Towards Minimum Impact Concentrators. PhD (Chem) Eija Saari Basf Innovation Day, Sept 13-14, 2018 Ludwigshafen

Transcription

1 Towards Minimum Impact Concentrators PhD (Chem) Eija Saari Basf Innovation Day, Sept 13-14, 2018 Ludwigshafen

2 Outotec - a process technology company 2

3 Minerals Processing Industry Will Face a Paradigm Shift How to stabilize /maximize flotation and dewatering performance Low ore grades Regulatory development TSF footprint and safety Water scarcity, quality and costs How to maximize profit Environmental legislation getting stricter Reduce TSF footprint Remove wet tailings dams Improve geotech. & -chem. stability Minimize environmental impacts Minimize TSF risks Manage entire site s water balance Increase process water recycling Minimize fresh water usage Minimize effluent volumes Reduce water related risks 3

4 A change from one way of thinking to another Surface Tailings Disposal Plant Solutions for footprint and risk reduction Dry-stacking Paste Thickened tailings Conventional tailings Low or no TSF embankments Smallest TSF footprint Stacking even in steep terrain Lowest risk of TSF failure Cheapest TSF rehabilitation Smaller footprint, higher capacity Smaller embankment needs None or very little seepage Minimized dusting Further reduced TSF failure risk Simplified closure Increased deposit strength Decreased deposit land footprint Reduced seepage Reduced risk of TSF failure Cost and liability reduction at closure Dry solids: 80-85% Footprint: 12% with cost 37% Water savings: up to 70 % Dry solids: 65-70% Footprint: 53% with cost 58% Water savings: up to 25 % Dry solids: 50-60% Footprint: 72% with cost 75% Water savings: - Dry solids: 30-40% Footprint: 100% with cost 100% Water savings: - Increase in Dry Content & Water Reuse 4

5 consequences Water Balance Changes Tailings Cu 20 Mt/a 5 11/12/2018 BASF Innovation Day Ludwigshafen

6 consequences Water Quality Changes Fines S- species Metals Fe, As, Ni, Cu Residual reagents Organics Biological activity Etc. 6

7 A change from one way of thinking to another Outotec Process Water Recycling Plant - Producing right water to right place Optimized solution, producing cost-effectively required quality water to enable higher and more stable flotation recovery For polymetallic, Cu, Au and Fe reverse flotation concentrators, where tailings dewatering takes place Pre-designed water treatment units and auxiliaries 7

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9 Application Development: Today and beyond SERENE Bring a WQQM solution to market to improve dynamic, predictive water balance management capability CYNCOR Electrochemical water treatment for cyanide and nitrogen compounds removal ITERAMS Develop and obtain a new paradigm proof of concept at mine sites to recycle water and valorise tailings for an improved environmental and economic result, to enable future sustainable mineral supply in Europe. 9

10 Application Development: Today and beyond Enabler for differentiated minimum impact concentrators World-class technologies Differentiated Application Development Engaged Customers Novel water treatment materials and methodologies Smart sensors & Advanced automation Novel flotation and water treatment chemistries Bacterial activity and its effects Geopolymers Data analytics, AI Containerized pilots Focusing resources to demonstrate how modular water treatment improves flotation performance 10

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