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):.
软锰矿辅助含砷难处理金矿生物预氧化工艺过程分析
Technological process and analysis of biological preoxidation of refractory gold ore containing arsenic with pyrolusite added in the bioleaching
投稿时间:2017-06-12  修订日期:2017-07-10
DOI:
中文关键词:  含砷金矿,预氧化,软锰矿,生物处理
英文关键词:gold  ore containing  arsenic, preoxidation, pyrolusite, biological  treatment
基金项目:河北省自然科学(E2015403017);河北地质大学校内项目(BQ2017019)
           
作者单位
张旭 河北地质大学
赵志强 北京矿冶研究总院
王雅静 河北地质大学
张小伟 河北地质大学
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中文摘要:
      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pH、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As的浸出速率和浸出率,较微生物直接浸出提高了15%以上。经过96小时生物预氧化后,含砷金矿中As的浸出率可以达到90%以上,软锰矿的加入使得溶液中AsO2-转化为H2AsO4-,降低了微生物浸出过程中As对微生物的毒性。
英文摘要:
      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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