某难处理金精矿焙烧—氰化提金工艺试验研究

doi:10.11872/j.issn.1005-2518.2014.06.077

Gold Science and Technology ›› 2014, Vol. 22 ›› Issue (6): 77-81.doi: 10.11872/j.issn.1005-2518.2014.06.077

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Extraction of Gold from Refractory Gold Concentrate by Roasting-Cyanide Leaching

WU Zhi¹，HUANG Zhongsheng¹，ZANG Hong¹，ZHONG Shuiping^1，2，WU Zengling^1，2

1.State Key Laboratory of Comprehensive Utilization of Low-Grade Refractory Gold Ores，Zijin Mining Group Co.，Ltd.，Shanghang 364200，Fujian，China；
2.College of Zijin Mining，Fuzhou University，Fuzhou 350116，Fujian，China

Received:2014-07-28 Revised:2014-09-05 Online:2014-12-28 Published:2015-01-14

Abstract

Abstract:

Focusing on the refractory gold concentrate in northwest region，the technology of roasting-cyanidation was studied and the optimized condition was obtained.Experimentation results show that the removal rate of S and As are 99.99% and 52.56% respectively，and the gold leaching rate is above 88.92% under these conditions：-0.043 mm was about 52.85%，the one stage roasting with the temperature of 450 ℃ and time of 1 hour，two stages roasting with the temperature of 700 ℃ and time of 0.5 hour.The best cyanide-leaching parameters are initial densities of sodium cyanide is 0.5‰，the liquid-solid ratio is 4 and time of 24 hours.

Key words: refractory gold concentrate, roasting, technology of gold extraction

CLC Number:

TF831

WU Zhi，HUANG Zhongsheng，ZANG Hong，ZHONG Shuiping，WU Zengling. Extraction of Gold from Refractory Gold Concentrate by Roasting-Cyanide Leaching[J].Gold Science and Technology, 2014, 22(6): 77-81.

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