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Assessment and control of the gold leaching parameters at Kiena Mines

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Abstract

Kiena Mines process a free milling gold ore containing 4.21 g/t Au, 3.1% pyrite and 0.4% pyrrhotite. The throughput has been increased by 40% by tight control of the leaching parameters. The limiting factor of the process is the retention time in the leach circuit. A study was initiated to evaluate the level of control of parameters (grinding size, dissolved oxygen, pH, free cyanide and lead nitrate) to optimize the circuit efficiency. It was found that oxygen and lead nitrate addition are important to maintain gold extraction, while decreasing processing costs. The results indicated that some control levels could be modified. Some results are discussed in relation to models developed. An implementation strategy was elaborated. A decrease of reagent costs is expected after implementation of these changes. (author)
Authors:
Deschenes, G; Fulton, M; [1]  Lafontaine, M [2] 
  1. CANMET, Mining and Mineral Sciences Labs., Ottawa, Ontario (Canada)
  2. Kiena Mines, McWatters Mines Inc., Operation Val d'Or, Val d'Or, PQ (Canada)
Publication Date:
Jul 01, 1999
Product Type:
Conference
Reference Number:
EDB-01:102564
Resource Relation:
Conference: Control and optimization in minerals, metals and materials processing - 38. annual conference of metallurgists of CIM. Gateway to the 21st Century, Quebec City, Quebec (Canada), 22-26 Aug 1999; Other Information: 9 refs., 4 tabs., 6 figs; PBD: 1999; Related Information: In: Proceedings of the international symposium on control and optimization in minerals, metals and materials processing, by Hodouin, D.; Bazin, C.; Desbiens, A. (eds.) [Laval Univ., Quebec City, Quebec (Canada)], 523 pages.
Subject:
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; CONTROL SYSTEMS; ELECTRONIC CIRCUITS; GOLD; LEACHING; OPTIMIZATION; ORE PROCESSING; PARAMETRIC ANALYSIS; PROCESS CONTROL
OSTI ID:
20206384
Research Organizations:
Canadian Inst. of Mining, Metallurgy and Petroleum, Montreal, Quebec (Canada)
Country of Origin:
Canada
Language:
English
Other Identifying Numbers:
Other: ISBN 0-919086-88-8; TRN: CA0100321056109
Availability:
Canadian Inst. of Mining, Metallurgy and Petroleum, 3400 de Maisonneuve W, Montreal, Quebec H3Z 3B8 (Canada)
Submitting Site:
CANN
Size:
page(s) 469-488
Announcement Date:
Nov 29, 2001

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Citation Formats

Deschenes, G, Fulton, M, and Lafontaine, M. Assessment and control of the gold leaching parameters at Kiena Mines. Canada: N. p., 1999. Web.
Deschenes, G, Fulton, M, & Lafontaine, M. Assessment and control of the gold leaching parameters at Kiena Mines. Canada.
Deschenes, G, Fulton, M, and Lafontaine, M. 1999. "Assessment and control of the gold leaching parameters at Kiena Mines." Canada.
@misc{etde_20206384,
title = {Assessment and control of the gold leaching parameters at Kiena Mines}
 author = {Deschenes, G, Fulton, M, and Lafontaine, M}
 abstractNote = {Kiena Mines process a free milling gold ore containing 4.21 g/t Au, 3.1% pyrite and 0.4% pyrrhotite. The throughput has been increased by 40% by tight control of the leaching parameters. The limiting factor of the process is the retention time in the leach circuit. A study was initiated to evaluate the level of control of parameters (grinding size, dissolved oxygen, pH, free cyanide and lead nitrate) to optimize the circuit efficiency. It was found that oxygen and lead nitrate addition are important to maintain gold extraction, while decreasing processing costs. The results indicated that some control levels could be modified. Some results are discussed in relation to models developed. An implementation strategy was elaborated. A decrease of reagent costs is expected after implementation of these changes. (author)}
 place = {Canada}
 year = {1999}
 month = {Jul}
 }