Communition Abstract. Fine grind attritional mills; can they or should they go coarser. D Capstick and B Currie

Size: px
Start display at page:

Download "Communition Abstract. Fine grind attritional mills; can they or should they go coarser. D Capstick and B Currie"

Transcription

1 Communition 2012 Abstract Fine grind attritional mills; can they or should they go coarser D Capstick and B Currie Since the introduction of fine grind attritional mills a number of years ago they have predominately been used for ultra fine and fine grind milling activities. The technology has been successfully applied extensively on regrind circuits, tailings and dump retreatment operations. Recently more interest has been shown on moving this technology further up the milling circuit to operate as a tertiary and secondary milling application downstream from the traditional ball mills. The move towards manufacturing much larger stirred mills has enabled the technology to be considered for run of mine processing. Is this a threat to traditional tumbling ball mills? Or can it been seen as complimentary? This paper investigates the experience of using the Deswik mills in coarse feed applications, the costs benefits in terms of OPEX and the implications of using what was thought to be a ultra and fine grind technology in a different milling environment.

2 Introduction Since the introduction of fine grind milling technology in the early eighties the application has constantly been evolving and seeking to find its niche in the minerals processing industry. Currently a number of manufacturers offer fine grind mills and they are used throughout the world in different commodities and conducting various milling duties. Many of the mills are now used in much coarser applications than the technology was previously intended. Speaking from our own experiences more process engineers are examining the potential of using the ceramic fine grind mills in coarser milling applications. Background The Deswik mill was initially designed as an ultra fine grind milling technology for the pigments industry. Over the last seven years the technology has been applied to a number of mining applications targeting ultra fine grind products. Clients in the precious metals commodities wish to mill refractory sulphide gold ores to between 10 and 25 microns from a fairly standard ball mill feed of 75 microns. The platinum and chrome industry has generally preferred to mill the end product to between 25 and 38 microns in their regrind circuits. Results Test results are available from a number of materials with a coarse feed size with our lab and pilot size mills and we have production mills that operate specifically on a coarse feed. One of the challenges of using 2 and 10 liter mills is that the coarser size feed material has a tendency to block the relatively small inlet apertures of lab size mills that are a ¾ inch diameter compared to that of a 2 inch to 6 inch inlet for a production mill. An opportunity to perform a grind tests on a magnetite material using a Deswik 10 mill was presented. The requirements for this material were for a product size of 45µm. As can be seen from the profiles below (fig 1) the magnetite ore was reduced from a feed of D90 372µm to a product of D90 41µm. The test work indicated that a very homogenous product can be produced. This is a critical requirement for the product specification as it is used in coal processing as a dewatering agent.

3 Figure 1 Test work here indicated that a production mill would be capable of producing 40 dry tonnes per hr operating at an estimated power consumption of 12.7 kwh/t. Similarly pilot test work on a gold mine where the testing examines the grind performance on both the final tailings and the feed from the primary cyclone. Figure 2

4 The Deswik 50 mill milled the 300µm feed to the target size of 69µm at a production rate of approximately 800 dry kgs/hr. A Deswik 250 mill has been operating for over nine months on a tertiary grind on a gold mine in Zimbabwe. The owners were convinced that an attritional mill was the best way to ensure a specific product size for a CIL circuit rather than having a larger recirculation load with the ball milling circuit. The Deswik 250 mills the ore in a cyanide solution passing the milled product to a leach circuit that has a leach time of 12 hours and maintains a tailings grade of 0.22 g/t. The mill produces 3.5 dry tonnes per hour milling a feed from a P80 350µm to a product of P80 110µm. Grinding media consumption does not seem to have been affected by the coarser nature of the feed material, though impellor wear of the third and fourth disc from the bottom is higher than with the finer feed. The mill lining is not exhibiting any additional wear from the coarser nature of the feed material. We continue to investigate other materials for the wear part components to reduce overall OPEX costs and maintenance time. Without doubt ceramic mills are being used on coarser feed material and their performance is comparable to ultilising a secondary or even tertiary ball mill in the circuit. As presented previously by Anglo Platinum, the M10, 000 IsaMill TM have been applied specifically to conduct coarser grind duties as tertiary grinding applications, producing pre-scavenging flotation products at an approximate P80 of 53 microns. The grind curves below (fig 3) from a chromite ore demonstrate the initial particle size reduction of coarse feed material is extremely rapid milling the D90 feed of 354µm to 44µm in five minutes of grinding, representing an eight fold reduction in particle size. It takes a further 10 minutes to reduce the 44um by half and then a further 15 minutes to mill the 22µm to 12µm. This is a considered to be a normal grind curve, and not particular to chromite ores. The rapid reduction of feed material to the standard P80 75µm ball mills products leads one to believe that these mills can offer a viable alternative to tumbling ball mills.

5 Figure 3 Table 1 below is generated from a grind test on a chromite ore with a feed of D80 200µm and milling to product of D90 106µm. Density water-kg/l 1.00 Density of solids-kg/l DRY 3.70 Throughput l/h 65,000 Density of slurry-kg/l 1.38 Slurry mass-kg/h / lph 89,700 % solids 38 Mass solids-kg 33,848 Amperage drawn-amps 400 Voltage-Volt 525 Root Motor efficiency-% 80 Power factor 0.95 kw-h consumed-kw-h 276 kw-h/ton 8.17 Table 1 Test work indicated that a 2500 mill would produce 33.8 dry tonnes per hour with an estimated power consumption 8.17kW-h/t. When comparing the performance of tumbling ball mills and attritional mills in secondary and tertiary milling circuits the OPEX costs are comparable, though this obviously depends upon the ore type, milling duties and operational performance.

6 Generally speaking the steel media consumption of the ball mills is much higher at over 1 kg/t rather than grams of ceramic grinding media per tonne processed. This is counter balanced by the higher cost of the ceramic media per tonne. Historical data suggests that the attritional mills are more efficient in terms of power consumption milling ore from 150um to 45um with power consumptions in the range of kwh/t. Whereas ball mills are estimated to operate within kwh/t range at similar milling duties. The operational advantages are increased when one considers that the attritional mills can be used in open circuit and generally produce a more normalized product than the ball mills. Furthermore in remote mining locations the costs of shipping and transporting many tonnes of steel for grinding purposes can be costly and add an element of risk in terms of guaranteed continuous grinding media supply to the operation. Developments Over the last few years the attritional mill manufacturers have started to design larger mills. This has been a direct response from the equipment industry to provide attritional mills/machines that can operate within the run of mine material. FLSmidth has a KD-VGM5000 under development and the product is in the detailed design phase. Three of these mills are committed to be manufacturer later this year, for a copper project in Mongolia. They will have an installed power of 1300kW and a design speed of 175 rpm, delivering an operating torque of 65, 000Nm and peak torque on start-up of up to 150%. Xstrata Technology on the back of their success with the M10, 000 mills have also announced that the M50, 0000 IsaMill TM is available to the industry. The limits to attritional mill design will probably be dictated by efficiencies of the drive systems. But if anything is to be learnt from the development of ball mills over the last few years then it seems inevitable that attritional mills are set to become larger and larger over time. Media manufactures are investigating the possibility of producing larger ceramic grinding media to accommodation the coarser grind requirements. Commonly the largest size beads available are 3.5mm we expect this to increase in future as some manufactures are looking to develop larger beads.

7 Conclusion Without doubt there is growing interest in using attritional grinding mills in coarser milling applications rather than merely as fine grinding technology on concentrates or tailings material. The technology can be seen as being complimentary to traditional ball mills whereby attritional mills act as secondary or tertiary milling equipment post ball milling, thus enabling the tumbling mills to concentrate on their areas of high efficiency. The mining industry will come under greater pressure both environmentally and commercially to explore every avenue to reduce energy consumption and costs. As noted in the Mining Industry Energy bandwidth study in 2007, the largest energy savings opportunity (70%) lies in improving the energy efficiency of the two most energy intensive processes grinding and materials handling. The study goes on to state that energy savings can be realised through best practices and research and development that develops more energy efficient technologies. I believe the application of attritional mills in more secondary and tertiary milling applications could form part of this initiative. Key words Ultra fine grinding Stirred Mills Attritional milling Acknowledgments Staff and management at ZMI Tannahill mine and New Dawn s Turk mine in Zimbabwe. FLSmidth colleagues References RULE CM Stirred milling new communition technology in the PGM industry Journal of the South African Institute of Mining and Metallurgy pages RULE CM and De Waal H IsaMill Design Improvements and Operational Performance at Anglo Platinum US Dept Energy - Mining Industry Energy bandwidth study

IsaMill Design Improvements and Operational Performance at Anglo Platinum

IsaMill Design Improvements and Operational Performance at Anglo Platinum IsaMill Design Improvements and Operational Performance at Anglo Platinum C Rule 1 and H de Waal 2 1. Head of Concentrators Technology, Anglo American Platinum, 55 Marshall Street, Marshall Town, Johannesburg,

More information

VXP2500 STIRRED MILL OPTIMIZATION AT CASMYN MINING TURK MINE

VXP2500 STIRRED MILL OPTIMIZATION AT CASMYN MINING TURK MINE VXP2500 STIRRED MILL OPTIMIZATION AT CASMYN MINING TURK MINE *S. Reddick 1, D. Rahal 1, B Hines 1, I. Shah 1 1 FLSmidth Minerals 7158 S FLSmidth Drive Midvale, UT, 84047 USA (*Corresponding author: scott.reddick@flsmidth.com)

More information

Stirred Milling machine development and application extension. Jon Allen Metso Global product manager, Stirred Mills

Stirred Milling machine development and application extension. Jon Allen Metso Global product manager, Stirred Mills Stirred Milling machine development and application extension Jon Allen Metso Global product manager, Stirred Mills Current technologies Efficiency and application range development Contents Machine development

More information

Energy considerations in the current PGM processing flowsheet utilizing new technologies

Energy considerations in the current PGM processing flowsheet utilizing new technologies Paper _Rule:text 9/2/0 1: PM Page 4 RULE, C.M. Energy considerations in the current PGM processing flowsheet utilizing new technologies. Third International Platinum Conference Platinum in Transformation,

More information

Fine grinding Developments in ceramic media technology and resulting improved plant performance at Anglo Platinum

Fine grinding Developments in ceramic media technology and resulting improved plant performance at Anglo Platinum Paper 83_Rule:Paper 83_Rule 9/26/08 1:59 PM Page 53 RULE, C.M., KNOPJES, L., CLERMONT, B. and PHILIPPE, C. Fine grinding developments in ceramic media technology and resulting improved plant performance

More information

An Overview of the HPGR and Fine Grinding Technologies to Characterize Ore Grindability

An Overview of the HPGR and Fine Grinding Technologies to Characterize Ore Grindability An Overview of the HPGR and Fine Grinding Technologies to Characterize Ore Grindability F.O. Verret Group Leader Metallurgy Québec City SGS Minerals Services, Québec, Qc, Canada. Outline Introduction Bench-scale

More information

Ultra fine grinding of intermediate flotation concentrates in the PGM industry at the Pt Mile operation on Anglo Platinum tailings

Ultra fine grinding of intermediate flotation concentrates in the PGM industry at the Pt Mile operation on Anglo Platinum tailings text:text 9/26/08 1:57 PM Page 37 RULE, C.M., KNOPJES, L., and ATKINSON, R.J. Ultra fine grinding of intermediate flotation concentrates in the PGM industry at the Pt Mile operation on Anglo Platinum tailings.

More information

From base metals and back IsaMills and their advantages in African base metal operations

From base metals and back IsaMills and their advantages in African base metal operations The Southern African Institute of Mining and Metallurgy Base Metals Conference 2013 H. de Waal, K. Barns, and J. Monama From base metals and back IsaMills and their advantages in African base metal operations

More information

PYTHON UNDERGROUND PROCESSING PLANT CRITICAL DESIGN

PYTHON UNDERGROUND PROCESSING PLANT CRITICAL DESIGN PYTHON UNDERGROUND PROCESSING PLANT CRITICAL DESIGN S Gray 1 ABSTRACT The use of continuous gravity recovery in combination with a controlled breakage fine crushing and screening system followed by flash

More information

Development and Implementation of the new 2240 kw (3000 HP) VERTIMILL Grinding Mill for Newcrest

Development and Implementation of the new 2240 kw (3000 HP) VERTIMILL Grinding Mill for Newcrest Development and Implementation of the new 2240 kw (3000 HP) VERTIMILL Grinding Mill for Newcrest Cadia Valley Operations Jonathan Allen and Brian Knorr Presenter: Raul Noriega Previous Scale Up Previous

More information

The Albion Process at the GPM Gold Project The success of a technology

The Albion Process at the GPM Gold Project The success of a technology The Albion Process at the GPM Gold Project The success of a technology Paul Voigt, Glencore Technology (paul.voigt@glencore.com.au) David Walker, Core Resources (dwalker@coreresources.com.au) CIM Conference

More information

SAG Page 1. Page 2

SAG Page 1. Page 2 Page 1 Page 2 SAG 2 0 0 6 DEPARTMENT OF MINING ENGINEERING UNIVERSITY OF BRITISH COLUMBIA Vancouver, B. C., Canada grade Cannington resource is classified at 42 million tonnes, 551ppm silver, 12.1% lead

More information

High pressure grinding rolls applications for the platinum industry

High pressure grinding rolls applications for the platinum industry KNECHT, J. and PATZELT, N. High pressure grinding rolls applications for the platinum industry. International Platinum Conference Platinum Adding Value, The South African Institute of Mining and Metallurgy,

More information

Flowsheet development for the Sukari gold project in Egypt

Flowsheet development for the Sukari gold project in Egypt RHODES, M. and PENNA, F. Flowsheet development for the Sukari gold project in Egypt. World Gold Conference 2009, The Southern African Institute of Mining and Metallurgy, 2009. Flowsheet development for

More information

Development of an Innovative Copper Flowsheet at Phu Kham. M F Young and I Crnkovic

Development of an Innovative Copper Flowsheet at Phu Kham. M F Young and I Crnkovic Development of an Innovative Copper Flowsheet at Phu Kham M F Young and I Crnkovic Phu Kham Location in Laos Phu Kham Plant Layout Plant Layout showing Primary Grinding Rougher Flotation IsaMill Regrinding

More information

Sustainable Mining through Continuous Operational Cost Control and Decrease of It Over the Mine Life Saso Kitanoski Director Sales and Service CEE

Sustainable Mining through Continuous Operational Cost Control and Decrease of It Over the Mine Life Saso Kitanoski Director Sales and Service CEE Sustainable Mining through Continuous Operational Cost Control and Decrease of It Over the Mine Life Saso Kitanoski Director Sales and Service CEE Making the big difference to our customers Mining Industry

More information

Company Introduction. Management Team & Experience. Company

Company Introduction. Management Team & Experience. Company Company profile Company Introduction AZMET Technology & Projects is a world class multi-disciplined Engineering Design and Project Management Company. AZMET s Industry knowledge and experience, linked

More information

New project in Russia with semiautogenous mill selected according to the results of SAGDesign testing

New project in Russia with semiautogenous mill selected according to the results of SAGDesign testing New project in Russia with semiautogenous mill selected according to the results of SAGDesign testing ABSTRACT 507 Yury V. Kulikov, Arkady Y. Senchenko* John Starkey TOMS institute, Ltd., Russia TOMS institute,

More information

A PROTOCOL FOR CONDUCTING AND ANALYSING PLANT TRIALS: TESTING OF HIGH-CHROME GRINDING MEDIA FOR IMPROVED METALLURGY

A PROTOCOL FOR CONDUCTING AND ANALYSING PLANT TRIALS: TESTING OF HIGH-CHROME GRINDING MEDIA FOR IMPROVED METALLURGY C. J. Greet A PROTOCOL FOR CONDUCTING AND ANALYSING PLANT TRIALS: TESTING OF HIGH-CHROME GRINDING MEDIA FOR IMPROVED METALLURGY C. J. Greet Magotteaux Australia Abstract It is widely accepted that the

More information

An overview of HPGR testwork program at Mintek

An overview of HPGR testwork program at Mintek Council for Mineral Technology An overview of HPGR testwork program at Mintek 5 th June 2009 Johnny T. Kalala Head of Comminution, Minerals Processing Division, Mintek Presentation overview Introduction

More information

TOWER FINE MILLING EXPERIENCE AT MOUNT ISA MINES

TOWER FINE MILLING EXPERIENCE AT MOUNT ISA MINES TOWER FINE MILLING EXPERIENCE AT MOUNT ISA MINES Aleksandar Jankovic, Michael Young, David Hinds Mount Isa Mines Ltd Mount Isa, Queensland 4825 Abstract -. Over the last ten years Tower mills were studied

More information

Stirred milling new comminution technology in the PGM industry

Stirred milling new comminution technology in the PGM industry RULE, C. Stirred milling new comminution technology in the PGM industry. The 4th International Platinum Conference, Platinum in transition Boom or Bust, The Southern African Institute of Mining and Metallurgy,

More information

Company Introduction. Management Team & Experience. Company

Company Introduction. Management Team & Experience. Company Company profile Company Introduction AZMET Technology & Projects is a world class multi-disciplined Engineering Design and Project Management Company. AZMET s Industry knowledge and experience, linked

More information

Resource Efficient Mining Processes of Tomorrow

Resource Efficient Mining Processes of Tomorrow Metso Process Technology & Innovation (PTI) Resource Efficient Mining Processes of Tomorrow R&D Project Authors: K Duffy W Valery A Jankovic P Holtham www.metso.com General PTI presentation 2014 2015 A

More information

CYCLOSIZER. For Sub-Sieve Sizing SEPOR INC 718 N. FRIES AVE P.O.BOX 578 WILMINGTON, CA PHONE: FAX :

CYCLOSIZER. For Sub-Sieve Sizing SEPOR INC 718 N. FRIES AVE P.O.BOX 578 WILMINGTON, CA PHONE: FAX : CYCLOSIZER For Sub-Sieve Sizing SEPOR INC 718 N. FRIES AVE P.O.BOX 578 WILMINGTON, CA 90748 PHONE: 310-830-6601 FAX : 310-830-9336 INTRODUCTION The Cyclosizer is a laboratory precision apparatus for the

More information

FLSmidth VXPmill. Delivering Value

FLSmidth VXPmill. Delivering Value FLSmidth VXPmill 2 FLSmidth VXPmill Delivering Value The VXPmill is designed as an efficient option for fine and ultra fine grinding applications and outperforms similar technologies in: Capital cost Flexible

More information

The implications of ore hardness variability on comminution circuit energy efficiency (and some other thoughts)

The implications of ore hardness variability on comminution circuit energy efficiency (and some other thoughts) The implications of ore hardness variability on comminution circuit energy efficiency (and some other thoughts) Peter Amelunxen Thursday 6 December 2012 Capital (Millions) Current Cu/Mo Mill Design (a

More information

Evaluation of Grade Engineering using Enterprise Optimization. Michael Scott, Nick Redwood

Evaluation of Grade Engineering using Enterprise Optimization. Michael Scott, Nick Redwood Evaluation of Grade Engineering using Enterprise Optimization Michael Scott, Nick Redwood Who we are Not for Profit Research Organization Site implementation of stepchange innovation Grade Engineering

More information

The Increased Recovery Project at the Phu Kham Copper-Gold Operation, Laos PDR. Authors: A Hoyle, D Bennett, and P Walker

The Increased Recovery Project at the Phu Kham Copper-Gold Operation, Laos PDR. Authors: A Hoyle, D Bennett, and P Walker The Increased Recovery Project at the Phu Kham Copper-Gold Operation, Laos PDR Authors: A Hoyle, D Bennett, and P Walker IRP Presentation Summary 1. Phu Kham mineralogy and implications for process design

More information

air classification UCX air classifier series

air classification UCX air classifier series UCX air classifier series The process of air classification is of critical importance for many grinding operations. Generally the overall energy consumption for grinding can be reduced drastically provided

More information

First Chalcopyrite Copper Concentrate Leaching using Albion Process TM Technology. Glenn Stieper

First Chalcopyrite Copper Concentrate Leaching using Albion Process TM Technology. Glenn Stieper First Chalcopyrite Copper Concentrate Leaching using Albion Process TM Technology Glenn Stieper BACKGROUND Glencore has an operating plant, Sable Zinc, in Zambia that was being un-utilised due to the lack

More information

Progressive grinding technology with Loesche VRM for the mining industry

Progressive grinding technology with Loesche VRM for the mining industry Progressive grinding technology with Loesche VRM for the mining industry Carsten Gerold, LOESCHE GmbH Roadshow Cement & Minerals Latin America, Lima 03-05-2013 Loesche: comminution expertise since more

More information

The TMAC Resources Inc. Hope Bay Project An Innovative Approach. Gerhard Bezuidenhout

The TMAC Resources Inc. Hope Bay Project An Innovative Approach. Gerhard Bezuidenhout The TMAC Resources Inc. Hope Bay Project An Innovative Approach Gerhard Bezuidenhout Gekko s mission Global Footprint Global & Gold/Silver Focused - increasing coal/polymetallic focus Total 150 staff Team

More information

HRC : Taking HPGR efficiency to the next level by reducing edge effect

HRC : Taking HPGR efficiency to the next level by reducing edge effect HRC : Taking HPGR efficiency to the next level by reducing edge effect High Pressure Grinding Roll (HPGR) technology has been accepted as an energy efficient alternative to conventional comminution circuits

More information

Kanowna Belle Pre-Oxidation Project

Kanowna Belle Pre-Oxidation Project Kanowna Belle Pre-Oxidation Project Kanowna Belle Processing Kanowna Belle treats both free milling and refractory ores with the free milling material being sourced predominantly from the East Kundana

More information

Improvements in bi-metal production at the Brunswick plant, Costerfield.

Improvements in bi-metal production at the Brunswick plant, Costerfield. 1 Improvements in bi-metal production at the Brunswick plant, Costerfield. D Buchanan 1, V Cullinan 2 1. MAusIMM, Processing Plant Manager, Mandalay Resources Costerfield Operations, 1024 Heathcote Nagambie

More information

Crushing. Comminution

Crushing. Comminution Comminution In order to separate the minerals from gangue (the waste minerals), it is necessary to crush and grind the rock to unlock, or liberate, valuable minerals so that they are partially or fully

More information

Increasing the Energy Efficiency of Processing

Increasing the Energy Efficiency of Processing Increasing the Energy Efficiency of Processing Joe Pease General Manager Xstrata Technology August 2007 1 Can we double the energy efficiency of grinding? Diminishing returns on research? Radical new technologies?

More information

IM 23. PRAGUE June Hosokawa Alpine Aktiengesellschaft, Augsburg, Germany Minerals & Metals Division Mr. Dietmar Alber

IM 23. PRAGUE June Hosokawa Alpine Aktiengesellschaft, Augsburg, Germany Minerals & Metals Division Mr. Dietmar Alber IM 23 PRAGUE 13-15 June 2016 Hosokawa Alpine Aktiengesellschaft, Augsburg, Germany Minerals & Metals Division Mr. Dietmar Alber 1 Topic & Discussion Processing developments: What are the innovations in

More information

IMAGING TECHNOLOGIES TO UNDERSTAND GRINDING AT PARTICLE SCALE IN A UG-2 PLATINUM ORE PROCESSING PLANT

IMAGING TECHNOLOGIES TO UNDERSTAND GRINDING AT PARTICLE SCALE IN A UG-2 PLATINUM ORE PROCESSING PLANT Paper No. 71 IMAGING TECHNOLOGIES TO UNDERSTAND GRINDING AT PARTICLE SCALE IN A UG-2 PLATINUM ORE PROCESSING PLANT S Leroy 1, * and E Pirard ABSTRACT Grinding is the most energy consuming step in mineral

More information

VertiMill Performance Updates in Secondary and Regrind Duties at Cannington Mine, BHP-B

VertiMill Performance Updates in Secondary and Regrind Duties at Cannington Mine, BHP-B VertiMill Performance Updates in Secondary and Regrind Duties at Cannington Mine, BHP-B Sam Palaniandy, Malcolm Powell and Marko Hilden (JKMRC) Jonathan Allen and Kamran Kermanshahi (Metso Minerals) Bill

More information

ASX ANNOUNCEMENT 12 MAY 2016

ASX ANNOUNCEMENT 12 MAY 2016 ASX ANNOUNCEMENT 12 MAY 2016 FÄBOLIDEN METALLURGICAL TEST WORK IMPROVES RECOVERY LEVELS Dragon Mining Limited (ASX:DRA) ( Dragon Mining or the Company ) is pleased to announce that the second phase of

More information

Sukari revise Gold production in Egypt

Sukari revise Gold production in Egypt Sukari revise Gold production in Egypt 1 2 Sukari Gold mines is located in the eastern desert of Egypt, 800 Km south of Cairo and about 25 Km west of The Red sea town Marsa Alam. Sukari gold is well located

More information

STIRRED MILLING TECHNOLOGY

STIRRED MILLING TECHNOLOGY STIRRED MILLING TECHNOLOGY Xstrata Technology Important expertise in Grinding, Flotation, Smelting, Leaching & Refining Technology Centre Sudbury North America Vancouver Tankhouse Technologies Townsville

More information

The benefit of separate milling of silicate and chromite particles for chromite-rich UG-2 ores

The benefit of separate milling of silicate and chromite particles for chromite-rich UG-2 ores The benefit of separate milling of silicate and chromite particles for chromite-rich UG-2 ores L. Maharaj *, B.K. Loveday, J. Pocock School of Chemical Engineering, University of KwaZulu-Natal, Durban,

More information

A CLOSER LOOK AT INCREASING HPGR EFFICIENCY VIA REDUCTIONS IN EDGE EFFECT

A CLOSER LOOK AT INCREASING HPGR EFFICIENCY VIA REDUCTIONS IN EDGE EFFECT A CLOSER LOOK AT INCREASING HPGR EFFICIENCY VIA REDUCTIONS IN EDGE EFFECT Brian Knorr, Metso, York, PA Victoria Herman, Metso, York, PA Devon Whalen, Freeport-McMoRan Inc., Phoenix, AZ Abstract Edge effect

More information

EMC FLOTATION TEST PROCEDURE 2 LABORATORY FLOTATION TEST PROCEDURE FOR MF1 AND MF2 TESTS AND REGRINDING OF CLEANER TAILINGS

EMC FLOTATION TEST PROCEDURE 2 LABORATORY FLOTATION TEST PROCEDURE FOR MF1 AND MF2 TESTS AND REGRINDING OF CLEANER TAILINGS EMC FLOTATION TEST PROCEDURE 2 LABORATORY FLOTATION TEST PROCEDURE FOR MF1 AND MF2 TESTS AND REGRINDING OF CLEANER TAILINGS SYNOPSIS Performing a flotation rate test characterises the ore. The results

More information

Comparison of grinding media Cylpebs versus balls

Comparison of grinding media Cylpebs versus balls Minerals Engineering 17 (4) 1259 1268 This article is also available online at: www.elsevier.com/locate/mineng Comparison of grinding media Cylpebs versus balls F. Shi * Julius Kruttschnitt Mineral Research

More information

EMC FLOTATION TEST PROCEDURE 2 LABORATORY FLOTATION TEST PROCEDURE FOR MF1 AND MF2 TESTS AND REGRINDING OF CLEANER TAILINGS

EMC FLOTATION TEST PROCEDURE 2 LABORATORY FLOTATION TEST PROCEDURE FOR MF1 AND MF2 TESTS AND REGRINDING OF CLEANER TAILINGS EMC FLOTATION TEST PROCEDURE 2 LABORATORY FLOTATION TEST PROCEDURE FOR MF1 AND MF2 TESTS AND REGRINDING OF CLEANER TAILINGS SYNOPSIS Performing a flotation rate test characterises the ore. The results

More information

Influence of Residence Time and Fine Grinding on PGMS Recovery and Grade Using a Float Characteristic Test Rig

Influence of Residence Time and Fine Grinding on PGMS Recovery and Grade Using a Float Characteristic Test Rig Influence of Residence Time and Fine Grinding on PGMS Recovery and Grade Using a Float Characteristic Test Rig Edison Muzenda, John Kabuba, Freeman Ntuli and Mansoor Mollagee Abstract This paper is a revised

More information

Minerals Enduron HPGR High Pressure Grinding Roll

Minerals Enduron HPGR High Pressure Grinding Roll Minerals Enduron HPGR High Pressure Grinding Roll *First choice for energy efficient grinding 1 High Pressure Grinding - proven technology High Pressure grinding has become the go to technology for size

More information

For personal use only

For personal use only 2 May 2018 ASX Announcement METALLURGICAL TESTWORK CONFIRMS WILUNA TRANSITIONAL RESERVES AMENABLE TO PROCESSING THROUGH THE EXISTING WILUNA CIL PLANT Highlights Expansion PFS published in Aug 17 includes

More information

Correction of Bond Ball Mill Work Index Test for Closing Mesh Sizes

Correction of Bond Ball Mill Work Index Test for Closing Mesh Sizes Correction of Bond Ball Mill Test for Closing Mesh Sizes Yardin Josefin 1 *, A.G. Doll 2 1. Student /University of British Columbia/ NBK Institute of Mining Engineering, Canada 2. Consultant/ SAGMILLING.com/

More information

Up-grades and Optimization of Crushing and Grinding Plants HPGRs for hard rock applications

Up-grades and Optimization of Crushing and Grinding Plants HPGRs for hard rock applications Up-grades and Optimization of Crushing and Grinding Plants HPGRs for hard rock applications AMM 2017 - The 8th Mining and Metallurgy Congress Astana, 25.05.2017 Roman Karl thyssenkrupp Industrial Solutions

More information

For personal use only

For personal use only ASX ANNOUNCEMENT / MEDIA RELEASE ASX: ABU 5th September, 2012 Old Pirate Metallurgical Test-Work delivers Exceptional Gold Recovery (up to 97.3%) from Two Different Gravity Methods ABM Resources NL ( ABM

More information

GRAVITY CONCENTRATION AND FLOTATION OF SPANISH MOUNTAIN COMPOSITES

GRAVITY CONCENTRATION AND FLOTATION OF SPANISH MOUNTAIN COMPOSITES GRAVITY CONCENTRATION AND FLOTATION OF SPANISH MOUNTAIN COMPOSITES SEPTEMBER 2010 2 1.0 SUMMARY 3 Gravity concentration and flotation testwork has been carried out on three composite samples from the Spanish

More information

20 June Pat Turner, President FLSmidth Krebs. Pumps and Cyclones. Capital Market Day 2017

20 June Pat Turner, President FLSmidth Krebs. Pumps and Cyclones. Capital Market Day 2017 20 June 2017 Pat Turner, President FLSmidth Krebs Pumps and Cyclones Pumps and Cyclones in a nutshell World leader in cyclones, strong player in slurry pumps Critical equipment for productivity in minerals

More information

Grinding Mills. NCP supplies new Grinding Mills and all ancillary equipment to clients across the globe

Grinding Mills. NCP supplies new Grinding Mills and all ancillary equipment to clients across the globe NCP supplies new Grinding Mills and all ancillary equipment to clients across the globe Grinding Mills New Concept Projects New Concept Projects (NCP), are highly regarded as leading manufacturers and

More information

PRE-FEASIBILITY METALLURGICAL TESTING GOLIATH GOLD PROJECT TREASURY METALS INCORPORATED KM2906. June 1, 2011

PRE-FEASIBILITY METALLURGICAL TESTING GOLIATH GOLD PROJECT TREASURY METALS INCORPORATED KM2906. June 1, 2011 PRE-FEASIBILITY METALLURGICAL TESTING GOLIATH GOLD PROJECT TREASURY METALS INCORPORATED KM2906 June 1, 2011 G&T METALLURGICAL SERVICES LTD. 2957 Bowers Place, Kamloops, B.C. Canada V1S 1W5 E-mail: info@gtmet.com,

More information

The Pre-Concentration Of Precious And Base Metal Deposits Using The Inline Pressure Jig (IPJ); Higher Feed Grades And More Metal.

The Pre-Concentration Of Precious And Base Metal Deposits Using The Inline Pressure Jig (IPJ); Higher Feed Grades And More Metal. IMPC Paper No. xxxxx The Pre-Concentration Of Precious And Base Metal Deposits Using The Inline Pressure Jig (IPJ); Higher Feed Grades And More Metal. Nigel J Grigg* & Georges J Delemontex Gekko Systems

More information

PHOSPHATE PRODUCERS IMPROVE PLANT PERFORMANCE USING C.P.T. INC FLOTATION TECHNOLOGY

PHOSPHATE PRODUCERS IMPROVE PLANT PERFORMANCE USING C.P.T. INC FLOTATION TECHNOLOGY PHOSPHATE PRODUCERS IMPROVE PLANT PERFORMANCE USING C.P.T. INC FLOTATION TECHNOLOGY Harold E. Wyslouzil - P.Eng President Canadian Process Technologies Inc. Vancouver, B.C. CANADA Column flotation cells

More information

Effect of Mineral Density for Milling Magnetite Ores

Effect of Mineral Density for Milling Magnetite Ores Effect of Mineral Density for Milling Magnetite Ores Alex Jankovic Phil Baguley Walter Valery Peter Holtham Metso Process Technology & Innovation IRON ORE 13 15 July Perth, Western Australia Overview Introduction

More information

Report No. A13575 Part 5

Report No. A13575 Part 5 CIL Extractive Testwork conducted upon Heap Leach (x2) and Drillhole (x2) Composites from the Mt Todd Gold Project for Vista Gold Australia Pty Ltd Report No. A13575 Part 5 April 2013 The results contained

More information

Extending the upper particle size limit for coal flotation

Extending the upper particle size limit for coal flotation Extending the upper particle size limit for coal flotation by R.-H. Yoon, G.H. Luttrell, and R. Asmatulu* Synopsis Novel flotation reagents were developed to improve the flotation of coarse particles.

More information

Water atomization of PGM-containing intermediate alloys

Water atomization of PGM-containing intermediate alloys text:text 9/26/08 2:22 PM Page 155 DUNKLEY, J.J., NORVAL, D., JONES, R.T., and CHENNELLS, P. Water atomization of PGM-containing intermediate alloys. Third International Platinum Conference Platinum in

More information

Figure 1: Schematic block-diagram of the project test work

Figure 1: Schematic block-diagram of the project test work METHODOLOGY A brief schematic diagram for the project test work is presented in Figure 1 and comprises the following main steps: sample collection, sample preparation, chemical characterization, grinding

More information

Energy Efficiency Comparison in Fine Grinding in the Mining Industry

Energy Efficiency Comparison in Fine Grinding in the Mining Industry Energy Efficiency Comparison in Fine Grinding in the Mining Industry Michel Brissette, M.Sc.A., Ing. VP Metallurgy John Starkey, B.Sc.A., P. Eng. Predident November 13 th, 2013 Outline 1. Fine Grinding

More information

16 July 2013 AIM:AMA / TSX:AMZ. Amara Mining plc ( Amara or the Company )

16 July 2013 AIM:AMA / TSX:AMZ. Amara Mining plc ( Amara or the Company ) 16 July 2013 AIM:AMA / TSX:AMZ Amara Mining plc ( Amara or the Company ) RESULTS OF METALLURGICAL TESTWORK AND FURTHER DRILLING RESULTS FROM YAOURE GOLD PROJECT Amara Mining plc, the dual AIM and TSX-listed

More information

Mintek, a national resource of minerals processing expertise for platinum ores

Mintek, a national resource of minerals processing expertise for platinum ores DEEPLAUL, V and BRYSON, M. Mintek, a national resource of minerals processing expertise for platinum ores. International Platinum Conference Platinum Adding Value, The South African Institute of Mining

More information

Influence of Lime Particle Size on Ph Modification of Gold Ores

Influence of Lime Particle Size on Ph Modification of Gold Ores International OPEN ACCESS Journal Of Modern Engineering Research (IJMER) Influence of Lime Particle Size on Ph Modification of Gold Ores W. K. Buah 1 and S. A. Ndur 2 Minerals Engineering Department, University

More information

From Tribulation to Triumph Flotation Improvements at the New Lac des Iles Concentrator

From Tribulation to Triumph Flotation Improvements at the New Lac des Iles Concentrator SGS MINERALS SERVICES TECHNICAL PAPER 2002-10 2002 From Tribulation to Triumph Flotation Improvements at the New Lac des Iles Concentrator Chris Martin - SGS; Tom Ohrling and Tom Olsen - North American

More information

Production of pelletizing concentrates from Zandrivierspoort magnetite/haematite ore by magnetic separation

Production of pelletizing concentrates from Zandrivierspoort magnetite/haematite ore by magnetic separation Production of pelletizing concentrates from Zandrivierspoort magnetite/haematite ore by magnetic separation by P. Muthaphuli* Synopsis Kumba Iron Ore s Zandrivierspoort (ZRP) magnetite-haematite project

More information

sepro product catalogue mineral systems mining mineral processing aggregates milling screening scrubbing gravity specialists

sepro product catalogue mineral systems mining mineral processing aggregates milling screening scrubbing gravity specialists sepro mineral systems mining mineral processing aggregates milling screening scrubbing gravity specialists product catalogue sepro mineral systems mining mineral processing aggregates milling sizing -

More information

For personal use only

For personal use only ASX Announcement 5 May 2014 COARSER GRIND SIZE TESTING DELIVERS VERY HIGH GOLD RECOVERIES FOR GRUYERE PROJECT Highlights Coarser grind size testing delivers very high gold recoveries Oxygen Sparging increases

More information

Metallurgium TM. Lessons Learned from the Copper Industry Applied to Gold Extraction. John O. Marsden

Metallurgium TM. Lessons Learned from the Copper Industry Applied to Gold Extraction. John O. Marsden Metallurgium TM Lessons Learned from the Copper Industry Applied to Gold Extraction John O. Marsden Keynote Presentation at World Gold 2009 Conference, Johannesburg, South Africa, October 30 th, 2009 Overview

More information

GETTING MORE FROM DRILL CORE PRELIMINARY SAG DESIGN

GETTING MORE FROM DRILL CORE PRELIMINARY SAG DESIGN GETTING MORE FROM DRILL CORE PRELIMINARY SAG DESIGN Randol Gold Forum, Monterey, California May 18-21, 1997 By John Starkey, P.Eng. Manager - Crushing and Grinding Minnovex Technologies Inc. 955 Wilson

More information

Lake Victoria Mining Co. Gravity, Flotation and Cyanide Leach Test Work. Prepared for:

Lake Victoria Mining Co. Gravity, Flotation and Cyanide Leach Test Work. Prepared for: Lake Victoria Mining Co. Gravity, Flotation and Cyanide Leach Test Work Prepared for: Dave Kalenuik Lake Victoria Mining Co. #810-675 West Hastings St. Vancouver, BC Canada V6B 1N2 (604) 719-2896 dkalenuik@gmail.com

More information

Ivanhoe Mines giant Kamoa copper discovery in the DRC a metallurgical perspective

Ivanhoe Mines giant Kamoa copper discovery in the DRC a metallurgical perspective http://dx.doi.org/10.17159/2411-9717/2016/v116n6a9 Ivanhoe Mines giant Kamoa copper discovery in the DRC a metallurgical perspective by V.L. Nkuna*, T. Naidoo*, and S.R. Amos* Ivanhoe Mines Kamoa copper

More information

PDAC 2015 MDM METALLURGICAL INNOVATION UNLOCKS CLIENT PROJECT VALUE. Listening with Care. Designing with Purpose. Delivering beyond Expectation.

PDAC 2015 MDM METALLURGICAL INNOVATION UNLOCKS CLIENT PROJECT VALUE. Listening with Care. Designing with Purpose. Delivering beyond Expectation. PDAC 2015 MDM METALLURGICAL INNOVATION UNLOCKS CLIENT PROJECT VALUE Listening with Care. Designing with Purpose. Delivering beyond Expectation. March 2015 Introduction MDM Engineering: o Process engineering

More information

A Review of Spiral Technology for Fine Gravity Beneficiation

A Review of Spiral Technology for Fine Gravity Beneficiation A Review of Spiral Technology for Fine Gravity Beneficiation D.K. HENDERSON and D.M. MacHUNTER MD mineral technologies, A division of Evans Deakin Industries Limited, PO Box 2569, Nerang Mail Delivery

More information

POLYCOM high-pressure grinding roll.

POLYCOM high-pressure grinding roll. POLYCOM high-pressure grinding roll. POLYCOM high-pressure grinding roll the proven, energy-saving grinding system. Outstanding results are obtained with the high-pressure grinding roll for the comminution

More information

FEASIBILITY METALLURGICAL TESTING GOLIATH GOLD PROJECT TREASURY METALS INCORPORATED KM3406. September 4, 2012

FEASIBILITY METALLURGICAL TESTING GOLIATH GOLD PROJECT TREASURY METALS INCORPORATED KM3406. September 4, 2012 FEASIBILITY METALLURGICAL TESTING GOLIATH GOLD PROJECT TREASURY METALS INCORPORATED KM346 September 4, 212 ISO 91:28 Certificate No. FS 6317 ALS Metallurgy G&T METALLURGICAL SERVICES ADDRESS 2957 Bowers

More information

Fine grinding, a refresher. *A.G. Doll 1

Fine grinding, a refresher. *A.G. Doll 1 Fine grinding, a refresher *A.G. Doll 1 1 Consultant, SAGMILLING.COM PO Box 1236 Logan Lake, B.C., Canada V0K 1W0 (*Corresponding author: alex.doll@sagmilling.com) ABSTRACT Many power-based grinding models

More information

For personal use only

For personal use only Positive Scoping Study: Aphrodite Gold Project 9 February 2012 Company Announcements Office Australian Securities Exchange Limited Positive Scoping Study for Aphrodite Gold Project Potential to Become

More information

STACK SIZER TM. Patented Technology. The highest capacity, most efficient, fine wet screening machine in the world

STACK SIZER TM. Patented Technology. The highest capacity, most efficient, fine wet screening machine in the world STACK SIZER TM Patented Technology The highest capacity, most efficient, fine wet screening machine in the world Patented Derrick Stack Sizer The Derrick Stack Sizer has redefined the concept of efficient,

More information

SAGDesign TM Using Open Technology for Mill Design and Performance Assessments

SAGDesign TM Using Open Technology for Mill Design and Performance Assessments SAGDesign TM Using Open Technology for Mill Design and Performance Assessments John Starkey and Kingsley Larbi Starkey & Associates Inc., Oakville, Ontario, Canada ABSTRACT The advent of direct measurement

More information

Implementing strategies to improve mill capacity and efficiency, with platinum references and case studies

Implementing strategies to improve mill capacity and efficiency, with platinum references and case studies BARKHUYSEN, N..J. Implementing strategies to improve mill capacity and efficiency, with platinum references and case studies. The 4th International Platinum Conference, Platinum in transition Boom or Bust,

More information

Sizing Methods Screening Classification

Sizing Methods Screening Classification Sizing Methods There are two methods of industrial sizing. i. Screening ii. Classification Screening is generally carried out on relatively coarse material, as the efficiency decreases rapidly with fineness.

More information

ENERGY SAVINGS AND TECHNOLOGY COMPARISON USING SMALL GRINDING MEDIA

ENERGY SAVINGS AND TECHNOLOGY COMPARISON USING SMALL GRINDING MEDIA ENERGY SAVINGS AND TECHNOLOGY COMPARISON USING SMALL GRINDING MEDIA M Brissette 1 ABSTRACT Considering the complexity of minerals, the need for finer grinding is increasing along with the energy cost.

More information

Laboratory and pilot scale testwork with 8 t ROM iron ore sample from Blötberget deposit (Sweden)

Laboratory and pilot scale testwork with 8 t ROM iron ore sample from Blötberget deposit (Sweden) Report on Laboratory and pilot scale testwork with 8 t ROM iron ore sample from Blötberget deposit (Sweden) for (Danderyd, Sweden) Liebenburg-Othfresen, 2016, May 25 th A7451_NordicIronOre_Blötberget_report.docx

More information

Duluth Metals Provides Metallurgical Update on Twin Metals Minnesota Project

Duluth Metals Provides Metallurgical Update on Twin Metals Minnesota Project Duluth Metals Provides Metallurgical Update on Twin Metals Minnesota Project Positive results from various metallurgical options considered for the Twin Metals Minnesota Project Good metal recoveries to

More information

Recent Studies on the Application of Fluidised-Bed Flotation for Treating Sulphide Ores at a Coarser Grind

Recent Studies on the Application of Fluidised-Bed Flotation for Treating Sulphide Ores at a Coarser Grind Recent Studies on the Application of Fluidised-Bed Flotation for Treating Sulphide Ores at a Coarser Grind Massimiliano Zanin 1, Bellson Awatey 1 and Jaisen Kohmuench 2 1. University of South Australia

More information

SIZE REDUCTION TECHNOLOGY

SIZE REDUCTION TECHNOLOGY SIZE REDUCTION TECHNOLOGY HOSOKAWA Alpine Size Reduction Technology Process Solutions for Granulation Requirements Alpine offers a variety of techniques tailored to meet the requirements of your business.

More information

Mining. Simulation of the Mineração Serra Grande Industrial Grinding Circuit. Mineração. Abstract. 1. Introduction. Thiago Oliveira Nunan

Mining. Simulation of the Mineração Serra Grande Industrial Grinding Circuit. Mineração. Abstract. 1. Introduction. Thiago Oliveira Nunan http://dx.doi.org/10.1590/0370-44672016700114 Thiago Oliveira Nunan Engenheiro de Processo AngloGold Ashanti Nova Lima Minas Gerais Brasil thiagonunan@gmail.com Homero Delboni Junior Professor Universidade

More information

Two-stage classification in one unit

Two-stage classification in one unit CAVEX ReCyclone Slurry Equipment Solutions Two-stage classification in one unit Cavex ReCyclone For many years Weir Minerals have applied their experience of slurry handling technology in the design and

More information

Maximizing the recovery of fine iron ore using magnetic separation

Maximizing the recovery of fine iron ore using magnetic separation Maximizing the recovery of fine iron ore using magnetic separation by M. Dworzanowski* Synopsis The beneficiation of fine iron ore will increase in importance in the future because most new iron ore resources

More information

TECHNOLOGICAL POSSIBILITIES FOR PULP DENSITY ALTERATION AT ELATZITE FLOTATION MILL

TECHNOLOGICAL POSSIBILITIES FOR PULP DENSITY ALTERATION AT ELATZITE FLOTATION MILL Annual of the University of Mining and Geology "t. Ivan Rilski" vol. 44-45, part II, Mining and Mineral Processing, ofia, 2002, pp. 61-65 TECHNOLOGICAL POIBILITIE FOR PULP DENITY ALTERATION AT ELATZITE

More information

Hummingbird Resources plc. Increased Metallurgical Recoveries for Tuzon Deposit

Hummingbird Resources plc. Increased Metallurgical Recoveries for Tuzon Deposit Increased Metallurgical Recoveries RNS Number : 7150F Hummingbird Resources PLC 29 April 2014 Hummingbird Resources plc ("Hummingbird" or the "Company") (AIM: HUM) Increased Metallurgical Recoveries for

More information

NEW APPROACH ON FLOTATION TAILINGS DEWATERING

NEW APPROACH ON FLOTATION TAILINGS DEWATERING NEW APPROACH ON FLOTATION TAILINGS DEWATERING Irena L. Grigorova, Ivan M. Nishkov University of Mining and Geology St. Ivan Rilski, Department of Mineral Processing and Recycling, 1700 Sofia, Bulgaria

More information

cavitation tube SPARGING SYSTEMS

cavitation tube SPARGING SYSTEMS cavitation tube SPARGING SYSTEMS FGB-103A CavTube Spargers Generate picobubbles to substantially improve flotation kinetics and increase recovery of ultrafines particles. Cavitation Tube spargers are the

More information