Intensified alkaline leaching pretreatment of refractory gold concentrates at common temperature and pressure

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	Intensified alkaline leaching pretreatment of refractory gold concentrates at common temperature and pressure
	Y. Q. Meng; M. J. Wu; S. L. Su; L. B. Wang
	2003
发表期刊	Transactions of Nonferrous Metals Society of China
ISSN	1003-6326
卷号	13 期号:2 页码:426-430
摘要	A new process for the hydrometallurgy of refractory gold concentrates was presented. The process comprises grinding-leaching, intensified alkaline leaching (IAL), cyanidation and adsorption. In a stirring-type pulverizing-leaching tower mill, the concentrate is ground to <35. 6 μm of 95. 5 % while simultaneously leached by NaOH of 12 kg/t, then carried out intensified alkaline leaching for 48 h by NaOH of 108 kg/t in enhanced agitation tanks with the pulp concentration of 40% solids at the environmental temperature of 9. 5 &SIM; 13. 5 &DEG;C and the environmental pressure of 10(5) Pa. The oxidation rate of As is 94. 9%, and 47. 6% for S. The total consumption of NaOH is only 20% of that theoretically calculated under the conditions of full oxidation at the same oxidation rates of arsenic to arsenate and sulfur to sulfate. The gold leaching rate by NaCN in 24 h is increased from 9. 2% before pretreatment to 94. 2%. The consumption of NaCN is 7. 5 kg/t, which is one times less than that before pretreatment. The extraction cost of gold is about 422 Yuan/t.
部门归属	chinese acad sci, inst met res, lab special preparing & proc technol, shenyang 110016, peoples r china.
关键词	Refractory Gold Concentrates Grinding-leaching Intensified Alkaline Leaching (Ial) Pretreatment Common Temperature And Pressure
URL	查看原文
WOS记录号	WOS:000182726000040
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/35969
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. Q. Meng,M. J. Wu,S. L. Su,et al. Intensified alkaline leaching pretreatment of refractory gold concentrates at common temperature and pressure[J]. Transactions of Nonferrous Metals Society of China,2003,13(2):426-430.
APA	Y. Q. Meng,M. J. Wu,S. L. Su,&L. B. Wang.(2003).Intensified alkaline leaching pretreatment of refractory gold concentrates at common temperature and pressure.Transactions of Nonferrous Metals Society of China,13(2),426-430.
MLA	Y. Q. Meng,et al."Intensified alkaline leaching pretreatment of refractory gold concentrates at common temperature and pressure".Transactions of Nonferrous Metals Society of China 13.2(2003):426-430.