高砷含锑难浸金精矿提金工艺的研究

J4 ›› 2001, Vol. 9 ›› Issue (3-4): 28-35.

高砷含锑难浸金精矿提金工艺的研究

方兆珩,夏光祥,石伟,韩宝玲

中国科学院化工冶金研究所, 北京　100080

收稿日期:2001-06-14 修回日期:2001-07-06 出版日期:2001-08-28 发布日期:2011-10-28
作者简介:方兆珩(1942-),男,研究员,从事矿物浸取科学与技术方面的研究.
基金资助:
国家自然科学基金资助项目(59974025)

Technological study on gold extraction from a refractory gold concentrate containing high As and Sb

FANG Zhao-heng,XIA Guang-xiang,SHI Wei,HAN Bao-ling

Institute of Chemical Metallurgy,Chinese A cademy of Science,Beijing 100080,China

Received:2001-06-14 Revised:2001-07-06 Online:2001-08-28 Published:2011-10-28

摘要/Abstract

摘要：

研究了高砷含锑难浸金精矿的中温低压氧化酸浸- 石灰液或氨浸氧化的联合预处理技术的工艺和优化操作条件,讨论了催化氧化酸浸、石灰液氧化浸出及氧化氨浸中主要影响因素的作用规律。预处理后, 金的氰化浸出率由未预处理时的几乎为零提高到90%以上。同时提出了一种酸浸渣直接氧压浸金的新过程,论述了酸浸渣中的元素硫在石灰液中氧压浸出的过程原理及主要条件因子的影响规律。结果表明, 金的浸出率基本上与联合预处理后金的氰化率相同。

关键词: 难浸金矿, 高砷含锑, 氧压酸浸, 石灰液氧化, 氧压浸金

Abstract:

A pretreating process of pressure leaching in acidic sulfate and nitrate solution and combined with sequent pressure leaching of the residue in a Ca(OH)₂ or ammonia solution for a refractory gold concentrate contain ing high As and Sb was proposed and investigated.The factors that affected pressure acidicor alkaline leaching were tested and discussed.Experimental results indicated that over 90% of gold was cyanided after pretreating by the combined process under optimized conditions.In contract,nearly zero percent of gold was extracted in direct cyanidation of the refrectory gold concentrate.On the other hand,a new extractive process of gold from the residue of acidic pressure leaching of the refractory concentrate was developed.In this extractive process the residue containing elemental sulfur was suffered by pressure leaching in a Ca(OH)₂ solution at a controlled pH range.The chemical process was described,and main factors affecting gold extracted yield was tested.The extracted gold in the process was near to the cyanidation after combined pretreating.

Key words: refractory gold, contain high As and Sb, leaching in acidic and combine with sequent pressure, pressure leaching in a Ca(OH)₂, pressure leaching of the refractory gold.

中图分类号:

TF831

方兆珩,夏光祥,石伟,韩宝玲. 高砷含锑难浸金精矿提金工艺的研究[J]. J4, 2001, 9(3-4): 28-35.

FANG Zhao-heng,XIA Guang-xiang,SHI Wei,HAN Bao-ling. Technological study on gold extraction from a refractory gold concentrate containing high As and Sb[J]. J4, 2001, 9(3-4): 28-35.

参考文献

[1] 夏光祥,方兆珩,石伟.难浸金矿的提金技术与展望[M].(有色金属科技进步与展望—记念‘有色金属’创刊50周年专辑).北京:冶金工业出版社,1999.256.
[2] 方兆珩,石伟,韩宝玲,等.高砷溶液中和脱砷过程[J].化工冶金,2000,21(4):359-362.
[3] Sparrow G J,Woodcock J T.Cyanide and other lixiviant leaching systems for gold with some practical applications[J].Mineral processing and Extractive Metallurgy Review,1995,(14):193-247.
[4] Block-Bolten A,Torma A E.Thiosulphate leaching of gold from sulphide wastes[J].Metall,1986,(40):687-689.
[5] Zhu Guocai,Fang Zhaoheng,Chen Jiayong.Leaching of gold from shuphide concentrate with thiosulphate/polysulphide produced by disproportionation of elemental sulphur in ammoniacal media[M].Hydromet allurgy. London:Chapman & Hall,1994.541-546.
[6] Zhang Jian,Lan Xinzhe,Yu Nengwen,et al.Leaching gold and platinum group metals by the LSSS method [M].Precious metals.Allentown:International Precious Metals Institute,1993.281-288.

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