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现代矿业 ›› 2022, Vol. 38 ›› Issue (07): 155-.

• 矿物加工工程 • 上一篇    下一篇

某高砷高硫难处理金矿生物氧化新工艺研究

高军雷1 伍红强2 辛金秀3 杨晓奇3 杜胜涛3 郭永超3   

  1. 1. 招金矿业股份有限公司;2. 中钢集团马鞍山矿山研究总院股份有限公司; 3. 额济纳旗圆通矿业有限责任公司
  • 出版日期:2022-07-25 发布日期:2023-06-09

A New Biological Oxidation Process of High Arsenic and High Sulfur Refractory Gold Mine

GAO Junlei1 WU Hongqiang2 XIN Jinxiu3 YANG Xiaoqi3 DU Shengtao3 GUO Yongchao3   

  1. 1. Zhaojin Mining Industry Co.,Ltd.;2. Sinosteel Maanshan General Institute of Mining Research Co., Ltd.;3. Ejina Yuantong Mining Industry Co.,Ltd.
  • Online:2022-07-25 Published:2023-06-09

摘要: 为了提高内蒙古某高砷高硫难处理金矿石的回收率,针对该矿石金银品位低、砷硫 含量高、目的矿物微细粒包裹等特点,进行了工艺矿物学分析,并进行了菌种驯化、细菌堆浸氧化、 氧化渣提金等探索试验研究。研究确定了细菌堆浸预处理—氰化浸出工艺路线,该难处理金矿最 终获得了砷氧化率60.45%,铁氧化率23.40%,硫氧化率48.32%,金浸出率77.10%,银浸出率 72.73%的工艺技术指标;与常规选冶工艺相比,采用该方案金浸出率可提高20 个百分点以上,为 此类矿石金、银有价元素的回收提供了可行的技术路线。

关键词: 高硫高砷, 难处理矿石, 堆浸, 生物氧化

Abstract: In order to improve the recovery rate of a high-arsenic and high-sulfur refractory gold ore in Inner Mongolia,in view of the characteristics of low gold and silver grade,high arsenic-sulfur content, and fine-grained inclusion of the target minerals,the process mineralogy was analyzed,and the strains were domesticated. Bacterial heap leaching oxidation,oxidation slag gold extraction and other exploratory experimental research. The research has determined the bacterial heap leaching pretreatment-cyanide leaching process route. The refractory gold ore resource finally obtained arsenic oxidation rate of 60.45%, iron oxidation rate of 23.40%,sulfur oxidation rate of 48.32%,gold leaching rate of 77.10%,and silver leaching rate 72.73%. Compared with the conventional beneficiation and smelting process,the gold leach⁃ ing rate can be increased by more than 20 percentage points,which provides a feasible technical route for the recovery of such ore gold and silver valuable elements.

Key words: high sulfur and high arsenic, refractory ore, heap dipping, biological oxidation