The mining has continuously been cyclical yet with the current worldwide economic system a pattern of brief reliable occasions through prolonged classes of low costs, coupled with expanding shareholder call for for functionality in all elements of the cycle, has been visible. The convention subject matter used to be approximately evolution and working excellence changing into crucial for survival within the minerals undefined. those 2003 convention lawsuits comprise a various diversity of papers, together with the layout of the Telfer enlargement; ramp up of recent operations equivalent to Century, Lihir and Ridgeway; significant enhancements at Goldfields; sun drying of laterite ores at Yabulu and novel applied sciences reminiscent of the Acacia Reactor for gold restoration, and new moisture probe built in Canada. a 3rd of the papers got here from in another country operations. in line with the mill operations concentration, papers written or co-authored via an working web site have been in particular chosen via the organizing committee to make sure charm and relevance to such a lot delegates, and readers of those lawsuits. This quantity is a beneficial list of achievements in mill operations over the last 4 years.
desk of Contents
Section 1. Comminution 1. comparability of 1 degree and degree type - A Case research
2. extremely high quality Grinding - a realistic replacement to Oxidative therapy of Refractory Gold Ores
three. Fines Minimisation within the Comminution of Phosphate Rock
four. Evolution of SAG Milling functionality - A comparability of Alumbrera and Ernest Henry
Section 2. Flotation five. Flotation Circuit research at WMC Ltd Olympic Dam Operation
6. enlargement of the Mount Isa Mines Copper Concentrator part One purifier Circuit growth
7. layout and Commissioning of the Ridgeway Concentrator
eight. Bringing cut up Flotation to fact - The Cannington adventure
nine. The Floatability Characterisation try Rig as a Pilot Plant for Flotation trying out - An Operator's perspective
10. Advances in Flotation approach keep an eye on at Porgera Gold Mine utilizing JK FrothCam Imaging know-how
eleven. The Flotation potential undertaking to extend the restoration within the Mount Isa Mines Copper Concentrator
Section three. Operations 12. Telfer undertaking strategy Plant layout
thirteen. Lihir Gold 5 Years on - Maximising Throughput and Capital Utilisation
14. enhancing the pliability of the Mt Gordon Ferric Leaching approach
15. Thalanga Processing Plant - As Many Lives as a Cat and simply as Curious
sixteen. The Phased Metallurgical improve process at Gold Fields constrained South African Operations
17. Ramp Up of the Pasminco Century Concentrator to 500 000 tpa Zinc steel construction in focus
Section four. strategy development 18. Gravity Leaching with the Consep ACACIA Reactor - effects from AngloGold Union Reefs
19. Metallurgical functionality types to enhance Cut-off Grade decision at Mount Isa Mines
20. online Moisture decision of Ore Concentrates - A evaluate of conventional tools and advent of a unique resolution
21. PIMS - the line to effective, within your budget Plant Operation
22. Fluorine elimination from okay Tedi Copper/Gold Concentrates
23. Mineralogy Controlling Metallurgy at Ernest Henry Mining Revisited
Section five. Utilities 24. Commissioning and method improvement of Pipeline and Port Operations at Pasminco Century
25. sunlight Drying of Laterite Ores at QNI Yabulu Refinery
26. strategy regulate and Flocculant Optimisation of Tailings Thickeners at PT Freeport Indonesia
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Additional resources for Eighth Mill Operators' Conference Proceedings 2003 - Evolution and Survival in the Minerals Industry
Historical ball consumption data is shown in Table 7. TABLE 7 Media consumption rates. 17 Eighth Mill Operators’ Conference Hydrocyclone operation The cyclone cluster of eight inclined Krebs 840 mm (33”) hydrocyclones receives combined ball mill and sub – screen deck size SAG mill discharge material via a 20/18 Warman centrifugal pump running with a 1700 kW variable speed motor through a gearbox. The hydrocyclone circuit was designed based on a circulating load ranging from 200 per cent of new feed to a maximum of 350 per cent.
As a result ball mill overloads were becoming a more common event which necessitated a capping of the SAG mill tonnages. Coarser hydrocyclone underflows (80 per cent passing 1500-1700um) were observed necessitating a change back to 65 mm balls to overcome this. Ball charging/ball charge volume Balls are lifted to the top floor of the grinding building in 20 tonne half-height containers. A series of bins and air-operated jaws allows a weighed amount of balls to be periodically added to the mill.
As further wear life data was collected on other hydrocyclone components the lower cone liners have also been replaced with a lower grade ceramic than is used for the spigots. SAG Mill liner/lifter design The evolution of the Ernest Henry SAG mill liners is shown in Table 8. The SAG mill was initially supplied with ME International rail bar design liners as specified in Table 8. These liners cracked longitudinally along the liner plate portion adjacent to the lifter rail after approximately three months of operation.
Eighth Mill Operators' Conference Proceedings 2003 - Evolution and Survival in the Minerals Industry