某难处理金矿生物预氧化
Biological Preoxidation of a Refractory Gold Ore
谭巧义 1高立强 2贾先兵 1贾炎 1孙和云 1牛晓鹏 1赵海平 3阮仁满1
作者信息
- 1. 中国科学院 过程工程研究所,北京 100190;战略金属资源绿色循环利用国家工程研究中心,北京 100190
- 2. 北方矿业有限责任公司,北京 100053
- 3. 北方矿业有限责任公司,北京 100053;中关村科技园区西城园管理委员会,博士后科研工作站,北方矿业有限责任公司分站,北京 100053
- 折叠
摘要
某金矿石中黄铁矿含量 5.31%、氧化率 6.02%,直接氰化金浸出率仅 27.78%,属典型的低品位硫化物包裹型难处理金矿.为评估生物堆浸预氧化工艺对该矿石的工业化应用前景,开展了直接氰化试验、生物搅拌预氧化-氰化试验和生物柱浸预氧化-氰化试验,考察了黄铁矿氧化率和金浸出率的关系以及温度对黄铁矿氧化率和金浸出率的影响.生物柱浸试验获得良好指标:原生矿破碎至D80=5.5 mm,在室温条件下(8～30℃)预氧化 221 d后,黄铁矿氧化率 52.30%,金的浸出率为 62.70%,氰化渣金品位为 0.47 g/t,较直接氰化浸出金浸出率(27.78%)提高 34.92 个百分点.
Abstract
A gold ore with high pyrite content(5.31%)and low oxidation rate(6.02%)belongs to a typical low-grade refractory sulfidic gold-bearing ore,the gold leaching rate by a direct cyanide-leaching was only 27.78%.In order to evaluate the industrial application prospect of bio-preoxidation heap leaching process,direct cyanide leaching test,bio-stirring pre-oxidation test and bio-column leaching test were carried out to investigate the relationship between pyrite oxidation rate and gold leaching rate and the effect of temperature on pyrite oxidation rate and gold leaching rate.The results of bio-column leaching test showed that under the conditions of D80=5.5 mm and at room temperature(8-30℃),about 52.30%of the pyrite was oxidized after 221 days,the leaching rate of gold came to 62.70%,which was 34.92 percentage points higher than that of direct cyanide leaching(27.78%),and the gold grade of leaching residue can be decreased to 0.47 g/t.
关键词
难处理金矿/生物预氧化/黄铁矿/柱浸Key words
refractory gold ores/biological preoxidation/pyrite/column leaching tests引用本文复制引用
基金项目
国家自然科学基金资助项目(51674231)
出版年
2024
NETL
NSTL
万方数据