共 17 条
The use of zinc for gold cementation from ammoniacal-thiosulphate solutions
被引:46
作者:
Navarro, P
Alvarez, R
Vargas, C
Alguacil, FJ
机构:
[1] CSIC, Ctr Nacl Invest Met, Madrid 28040, Spain
[2] Univ Santiago Chile, Dept Ingn Met, Santiago 10233, Chile
关键词:
cementation;
gold ores;
hydrometallurgy;
D O I:
10.1016/j.mineng.2004.02.001
中图分类号:
TQ [化学工业];
学科分类号:
0817 ;
摘要:
The use of zinc as a cementation agent for gold from ammoniacal-thiosulphate solutions has been studied. The experimental variables investigated were: (i) pH (9-10.5), (ii) thiosulphate concentration (0.05-0.4 M), (iii) temperature (5-50 degreesC), (iv) presence of zinc in the system (both as cementation agent and in the gold solution), (v) presence of Cu(II) (0-0.05 M) in the solution, and (vi) [NH3]/[S2O32-] molar ratio in the aqueous solution. The cementation process was considered to be under diffusion control. A generalmechanism for gold cementation is proposed. (C) 2004 Elsevier Ltd. All rights reserved.
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页码:825 / 831
页数:7
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