Clean-iX Metals Recovery

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2 Clean-iX Metals Recovery Combining the most efficient extraction and purification technologies with the best resin to deliver optimum solutions to clients. The Clean-iX process, developed by Australian-based company Clean TeQ, is built on the foundations of continuous ion exchange, a process that has been used in the industry for over 50 years. While the continuous counter-current ion exchange platform is similar for both metals recovery and process water treatment, the technology has been branded using different names: Clean-iX for metals recovery and Ionic Filtration ( ) for process water treatment. Counter-Current Ion Exchange Clean-iX for metals recovery for process water treatment crip Resin-in-Pulp cril Resin-in-Leach clx Liquid Extraction U-Column Concentration Desorption Dealkalisation and Target Species Removal DeSALx Brackish and Sulphate Dominant Desalination HiROx High Brackish High Recovery Reverse Osmosis

3 Clean-iX for Metals Recovery The modular full-scale and mobile Clean-iX range for metals recovery consists of continuous resin-in-pulp (crip), continuous resin-in-leach (cril) and continuous liquid extraction (clx) to recover ionic species from feed solutions, as well as U-Column concentration desorption for the production of high purity eluate. Leachant Slurry Tails To Elution Make-up Pulp / Slurry / Solution Leaching crip/cril/clx Elution Wash Water Resin Solution / Slurry Resin Screening & Fluidised Wash Resin Elution Straight Column or U-Column Eluent Clean-iX Process Metal Rich Eluate crip: Direct metals extraction from leached slurries and pulps, eliminating costly solid / liquid separation operations. cril: Direct metals extraction from leach pulps combines leaching and extraction into one stage. clx: Extraction of metals from clarified leach liquors using a moving packed bed column, maximising adsorption. This method of extraction has the highest efficiency compared to conventional technologies. U-Column: Patented U-Column for concentration of target species in-column producing a product eluate of higher concentration and purity than any other available elution technology. C X Ion Exchange (Clean-iX ) Metals Recovery Recovering Gold Vanadium Platinum Scandium Rare Earth Nickel Silver Palladium Elements Copper Recovering Chromium Zinc Tantalum Titanium Uranium Thorium Molybdenum Cobalt Niobium Zirconium

4 for Process Water Treatment The process can be likened to the continuous sand filtration process, the principal differences being that in the former process, charged resins are used instead of sand, and the process continuously removes dissolved salts (TDS) in addition to solids (TSS) from mine water. The modular full-scale and mobile range for process water treatment consists of single stage, dual stage DeSALx and HiROx to remove both cations and anions from feed waters. Resin Solution / Slurry Recycle to Feed Brine, Waste or By-product Recovered to Desorption Feed Adsorption Resin Washing Desorption / Elution Final Washing Product Water Feed or Process Water Chemical or Brine Water Ionic Filtration: Mine process solution enters the bottom of the adsorption column and leaves via the top, ready for beneficial re-use or complementary processing. Fluidised Wash: Dirty loaded resin is washed from contaminant solids in a fluidised wash process. Regeneration: Loaded resin is introduced to application-specific regeneration solutions, alkalis, acids or salts. Final Wash: Regeneration solutions are washed from the regenerated resin for recovery and reuse in the Ionic Filtration column. C CIF Ionic Filtration ( ) Process Water Treatment: Filter, Separate and Purify with Lower Costs and Maintenance Removing Salinity Suspended Solids Scaling Nitrate Fluoride Silica Removing Arsenic Selenium Heavy Metals Hardness Alkalinity Organics & Fouling

5 C CIF Single Stage Applications: Elements Removed: Benefits: Dealkalisation Pre-treatment for membranes Target Ion Removal Scaling ions (Ca, Mg, Ba, Sr, Mn, Fe, carbonate, etc.), fouling species, heavy metals Suitable for a range of water qualities and applications Simple solution for agricultural water production Feed Water Acid / Alkali / Salt Ion Removal Resin Regeneration Product Water Salt By-product C DS DeSALx - Dual Stage Ionic Desalination Applications: Elements Removed: Desalination of Brackish Water TDS < 5000 mg/l Dissolved Salts Feed Water Cation Removal Anion Removal Product Water Benefits: Lower cost and power consumption when compared to RO Minimal to no pre-treatment required Sulphuric Acid Cation Resin Regeneration Anion Resin Regeneration Lime Production of potentially valuable by-products Crystallisation add-on to produce a solid salt by-product Salt By-product C HR HiROx - Enabled Hi-Recovery Reverse Osmosis Applications: Elements Removed: Benefits: Desalination of Brackish Water TDS > 5000 mg/l Dissolved Salts Higher recovery when compared to conventional UF(MF)RO systems Feed Water Cation Removal Reverse Osmosis Product Water Simple, single stage pre-treatment process Crystallisation add-on to produce a solid salt by-product Salt By-product Cation Resin Regeneration Evaporator

6 Technology Features + Counter-current = Ion Exchange Ion Exchange Counter-current Ion Exchange Resin and slurry / solution continuously moved High resin efficiency and minimised resin inventory Higher concentration product solutions Resin and slurry / solution moved counter-current to each other Maximised reaction driving force for high recoveries Allows for highly selective recovery of target metals The most efficient form of ion exchange available on the market Technology Benefits Counter-current Ion Exchange Optimised resin inventory Decreased footprint Reduced reagent consumption Low maintenance costs Low power consumption Clean-iX ( Ion Exchange) For Metals Recovery High product recovery High purity products Selective recovery of metals Reduction in size of downstream processing units ( Ionic Filtration) For Process Water Treatment High water recovery Reduced brine production High solids handling Minimum pre-treatment requirements

7 Testwork and Piloting Facilities Laboratory Testwork Multotec has the facilities available to conduct upfront laboratory testwork including: Resin Screening Tests Ion Exchange Equilibrium Isotherms and Kinetics Column Loading and Elution Tests Pilot Work Multotec has invested in a 1 m 3 /h two-stage test rig, which is available for piloting the Clean-iX / technology. Clean TeQ Clients Metals Recovery Barrick BHP Paladin Energy Limited Rio Tinto ASSA ABLOY Process Water Treatment Water Corporation QGC (A BG Group Business)

8 Your Clean TeQ Representative in Africa Office: +27 (0) / +27 (0) Canada Germany Russia USA Turkey China Sierra Leone Burkina Faso Ghana India Peru Chile Brazil Botswana Namibia DRC Zambia South Africa Zimbabwe Mozambique Australia Branches Representatives MPE MRWT CVW 0315 CVW Rev.0