Grinding Circuit at Mouteh Gold Mine

Document Type : Research Article

Authors

Abstract

This study was conducted in Mouteh grinding circuit. Mouteh gold processing plant is located in Esfahan province,center of Iran, close to Mouteh open pit mine. One of the main problems in this circuit is low efficiency grinding operation. In this study, first grinding circuit and its performance parameters are evaluated. Laboratory and corrected operating Bond work index subsequently were calculated to be 16.8 and 21.47 (kwh/t), respectively. Bond efficiency factor then estimated to be 78.24%. Low value of this index means that the grinding operation is inefficient. Finally, efficiency of hydrocyclones evaluated and its cut size was calculated to be 85 microns.

[1]     Napier-Munn, Lynch, A., Whiten,B. "Mineral comminution circuits, their operation and optimization", T.J. II. Julius Kruttschnitt Mineral Research Centre (JKMRC), 2000
[2]      Albertsson, J., Walter, M., Optimizing grinding control in the Boliden Aitik mine, Application of Computers and Operations Research in the Mineral Industry, 2006
[3]      Augustine B. Makokha, Michael H. Moys
[4]      Michael H. Moys, Towards optimizing ball-milling capacity: Effect of lifter design, Minerals Engineering, 2006
[5]      Per Svedensten, C. Magnus Evertsson, Crushing plant optimization by means of a genetic evolutionary algorithm; Minerals Engineering; 2005
[6]      Kwade, A., Mill selection and process optimization using a physical grinding model, International journal of mineral processing, 2004
[7]      Stephen Morrell, An alternative energy–size relationship to that proposed by Bond for the design and optimization of grinding circuits, International journal of mineral processing, 2004
[8]      Schnatz, R., Optimization of continuous ball mills used for finish-grinding of cement by varying the L/D ratio, ball charge filling ratio, ball size and residence time, International journal of mineral processing, 2004
[9]      Kawatra, S. K., Eisele, T. C., Walqui H.J., Optimization of Comminution Circuit Throughput and Product Size Distribution by Simulation and Control, International journal of mineral processing, 2002
[10]   Gupta, R., Shishodia, K.S., Sekhon, G.S., Optimization in grinding process parameters using enumeration method, materials processing technology, 2001
[11]   Loveday, B.K., Dong, H., Optimization of autogenous grinding, Minerals Engineering, 2000
[12]   Fernandes, C., Peres, A.E.C., Optimization of the grinding circuit at Arafertil, Brazil, Minerals Engineering, 1999
[13]   King, R.P., "Comminution Research – A success story that has not yet ended", Proceedings XVIII, International Mineral Processing Congress, the Australasian IMM, 39-45 (1993).
[14]   Rowland, C.A., "The Bond work index, a tool to measure grinding efficiency", SME-AIME meeting & exhibition Denver, Colorado, 1976
[15]   Wills, B.A., "Mineral processing technology", Pergamon international library, Camborne School of mines, Cornwall, England, first edition, 1979
[16]   Mosher, J.B., Tague C.B., Conduct and precision of Bond grindagility testing, Minerals engineering, 2001
[17]   Tüzün, M.A., TechnicaL note wet Bond mill test, Minerals engineering, 2000
[18]   Austin, L.G., Klimpel, R.P., Luckie P.T., "Process engineering of size reduction: Ball milling", Society of mining engineering of the American Institue of mining, metallurgical & Petroleum Engineering, Inc, New York, 1984
[19]   Mclvor, R.E., Lavallee, M.L., Wood K.R., Blythe, P.M., and Finch, J.A., "Functional performance characteristics of ball milling", 1976
[20]   Dunn, D.J., "Design of grinding balls", Mining Engineering, technical papers, 1989
[21]   Aidan Ryan, "Designing & Operating documents for Mouteh gold processing plant", BHP Engineering Company, 1991
[22]   M. Johnson, "metallurgical review of Mouteh gold plant, project report", HATCH woodmead office, Johannesburg, South Africa, 2005
[23]   Dunn, D.J., "Metal removal mechanisms comprising wear in mineral processing", Mining Engineering, 1987
[24]   Weiss, N.L., Editor,"SME Mineral Processing Handbook"