| 软锰矿辅助含砷难处理金矿生物预氧化工艺过程分析 |
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| 引用本文： | 张旭,赵志强,王雅静,张小伟.软锰矿辅助含砷难处理金矿生物预氧化工艺过程分析[J].有色金属工程,2018,8(3). |
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| 作者姓名： | 张旭 赵志强 王雅静 张小伟 |
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| 作者单位： | 河北地质大学宝石与材料工艺学院;北京矿冶科技集团有限公司 |
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| 基金项目： | 河北省自然科学(E2015403017)；河北地质大学校内项目(BQ2017019) |
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| 摘 要： | 将软锰矿加入到含砷难处理金矿微生物浸出过程中,考察了p H值、矿浆浓度和接菌浓度对软锰矿辅助含砷难处理金矿生物预氧化过程的影响。结果表明,加入软锰矿辅助微生物浸出后可以显著提升含砷金矿中砷的浸出速率和浸出率,经过96 h生物预氧化后,砷浸出率可以达到90%以上。软锰矿的加入使得溶液中As O-2转化为H2As O-4,降低了微生物浸出过程中砷对微生物的毒性。
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| 关 键 词： | 含砷金矿 预氧化 软锰矿 生物处理 |
| 收稿时间： | 2017/6/12 0:00:00 |
| 修稿时间： | 2017/7/10 0:00:00 |
Technological process and analysis of biological preoxidation of refractory gold ore containing arsenic with pyrolusite added in the bioleaching |
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| ZHANG Xu,ZHAO Zhiqiang,WANG Yajing and ZHANG Xiaowei.Technological process and analysis of biological preoxidation of refractory gold ore containing arsenic with pyrolusite added in the bioleaching[J].Nonferrous Metals Engineering,2018,8(3). |
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| Authors: | ZHANG Xu ZHAO Zhiqiang WANG Yajing and ZHANG Xiaowei |
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| Affiliation: | HeBei GEO University Shijiazhuang,Beijing General Research Institute of Mining Metallurgy,Beijing,School of Gemology and Materials Technology,HeBei GEO University Shijiazhuang,School of Gemology and Materials Technology,HeBei GEO University Shijiazhuang |
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| Abstract: | Pyrolusite was added to the bioleaching process of refractory gold ore containing arsenic and the effects of pH, pulp concentration and inoculum concentration on the biological preoxidation were investigated with pyrolusite added in the bioleaching. The results show that pyrolusite added can significantly improve the As leaching rate and leaching efficiency from the refractory gold ore more than 15% compared with direct bioleaching. After 96 hours of biological pre oxidation, the leaching efficiency of As i from the refractory gold ore reached more than 90%. The addition of pyrolusite made the AsO2-oxidized to H2AsO4- and the toxicity of As was reduced during the bioleaching process. |
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| Keywords: | gold ore containing arsenic preoxidation pyrolusite biological treatment |
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