The Baker Mill start-up and early operation

Abstract The Baker Mine used a 100-ton per day conventional cyanide leach mill located in northern British Columbia. A production decision was made in early 1980 and the mill was on line in April 1981.
Ore reserves had been estimated at 100,000 tons averaging 0.9 oz gold per ton and 18 oz silver per ton. Mineralization consists ofelectrum (Au/Ag) and acanthite (Ag2S).
This paper will review plant design and focus on some problems associated with start-up and early operation with the intention of assisting other mine operators by indicating potential problem areas.
Keywords: Mineral processing, Plant design, Mill performance, Crushing, Grinding, Thickeners, Leaching, Filtration, Baker Mine.
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Publication: CIM Bulletin
Author(s): R. DEL VILLAR, A.R. LAPLANTE
Keywords: Mineral processing, Grinding circuits, Modelling, Mathematical simulation, Computer control, Ball mills.
Issue: 883
Volume: 78
Year: 1985
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Summary: The paper examines the role of gravity concentration in both an historical context and within the modern mineral processing industry. It discusses the principles of the process on both a theoretical and practical level. The importance of more mineralogy and its effect on the choice of the wide range of equipment available is discussed. The paper concludes with a discussion on the relative merits of gravity concentration with other forms of processing.
Publication: CIM Bulletin
Author(s): P.O. BURT, C. MILLS
Keywords: Mineral processing, Gravity concentration, Liquid separation, Beneficiation, Feed preparation, Concentrators, Middling products.
Issue: 883
Volume: 78
Year: 1985
Text
Summary: Fifty years of wear on the original carbon steel shaft of this hydro turbine necessitated repair operations in 1980. Both aus-tenitic and martensitic stainless steels have been used individually as journal materials in separate trials on an 80-inch long and 22-inch diameter radial bearing but neither one nor the other has been successful.
The wear and cracking problems of the stainless steels leading to the present abandonment of both classes of stainless steel are described. In particular...
Publication: CIM Bulletin
Author(s): J.C. THORNLEY, H.L.J. DRUMMOND
Keywords: Materials engineering, Metallurgy, Stainless Steels, Austenitic steel, Martensitic steel, Bearings, Cracking, Welding, Fracturing.
Issue: 883
Volume: 78
Year: 1985
Text
Summary: A sample of Hat Creek coal has been extracted using supercritical aromatic solvents in a laboratory-scale extraction unit. Extract yields in the range 21 to 27 per cent of dry-ash-free coal were obtained.
These yields are significantly lower than yields available from high-volatile bituminous coal and some lignites. Thus in a combined extraction/hydrocracking scheme for the production of liquid fuels from Hat Creek coal the char product would exceed that required to supply the energy and...
Publication: CIM Bulletin
Author(s): M.M. PAPIC
Keywords: Coal extraction, Supercritical Gas Extraction process, Hydrocracking process, Coal recovery, Lignites, Hat Creek coal.
Issue: 883
Volume: 78
Year: 1985
Text
Summary: The separation of hematite fines (100% -38 pm) from quartz fines (100% -75 /j.m) was investigated using coarse hematite (-212 +150 /j.m) as a carrier in an oleic acid collector system. Oleic acid additions, per cent coarse additions, combined conditioning time and ferric chloride additions were examined.
It was found that carrier flotation is a dominant mechanism for fine hematite recovery at oleic acid levels greater than 200 g/t and coarse additions of 10 per cent. Hetero-aggregation is...
Publication: CIM Bulletin
Author(s): IRENE E. CRISTOVEANU, JOHN A. MEECH
Keywords: Mineral processing, Carrier flotation, Hematite, Comminution, Flotation, Mechanical entrainment, Bubble attachment, Aggregation, Oleic acid.
Issue: 883
Volume: 78
Year: 1985
Text
Summary: This paper describes the successful pilot plant testing of a flowsheet, developed at Inco Ltd. 's J. Roy Gordon Research Laboratory (JRGRL), for improved separation of the constituent minerals in a bulk copper-nickel concentrate.
The flowsheet utilized the fact that xanthate concentration on the mineral surfaces is the most important variable affecting the high lime separation and that reduction of the xanthate concentration could be affected by an oxidative conditioning stage.
When the...
Publication: CIM Bulletin
Author(s): W.B. KIPKIE, G.E. AGAR, R.A. TENBERGEN
Keywords: Mineral processing, Copper-nickel separation, Copper concentrates, Pilot-plant testing, Nickel concentrates, Copper Cliff mill.
Issue: 883
Volume: 78
Year: 1985
Text
Summary: A laboratory test program was initiated by the Department of Energy, Mines and Resources as part of the National Uranium Tailings Program to investigate the applicability of a radium-selective ion exchange complexer for removing radium from Canadian uranium mining effluents. The test program was carried out by Melis Consulting Engineers Ltd. under contract to the Department of Supply and Services using the Saskatchewan Research Council facilities located in Saskatoon, Saskatchewan. The...
Publication: CIM Bulletin
Author(s): LA. MELIS
Keywords: Metallurgy, Uranium, Uranium tailings, Radium, Ion exchange, Tailings disposal, Waste treatment, Radium-selective complexer, Radon daughters, Radiation.
Issue: 883
Volume: 78
Year: 1985
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