稀硫酸浸出结合生物氧化硫酸铁沉淀法处理铜砷滤饼废渣  

Dilute sulfuric acid leaching combined with bio-oxidation of ferric sulfate precipitation to handle Cu-As filter cake waste

作　　者：杨巧[1,2] 李媛媛[1] 张广积[1] 杨超[1] 

机构地区：[1]中国科学院过程工程研究所,湿法冶金清洁生产技术国家工程实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《计算机与应用化学》2013年第6期587-590,共4页Computers and Applied Chemistry

基　　金：国家自然科学基金项目(51174185);北京市自然科学基金(2112038);国家重点基础研究发展计划(973)资质项目(2010CB630904);国家高技术研究发展计划(863)资助项目(2011AA060704)

摘　　要：提出了一种处理铜砷滤饼的简易方法,首先在弱酸条件下直接浸出铜砷滤饼中的砷,将含铜浸出渣返回冶炼流程;使用生物氧化产生的硫酸铁溶液对浸出液进行吸附沉淀,将砷转化为稳定的固体废渣。研究了铜砷滤饼的浸出条件,包括处理时间、温度、pH等,结合对浸出渣的XRD、SEM及能谱分析,确定了最佳浸出条件;随后添加硫酸铁溶液沉砷并用石灰中和,并比较了采用生物氧化法制得的硫酸铁溶液与化学试剂溶解产生的硫酸铁溶液的除砷效果,证明采用生物氧化三价铁溶液沉砷效果要好于普通化学试剂溶解产生的三价铁溶液。A simple method was proposed to treat Cu-As-bearing filter cake. First of all, the cake was leached in the diluted sulfuric acid and the residue containing copper can be reused as a raw material in the smelting process. Secondly, the dissolved arsenic was converted to a stable solid residue co-precipitated with biogenetic Fe2（SO4）3. In this study, the leaching conditions of Cu-As-bearing filter cake, including temperature and pH of solution, were investigated, combined with the analysis by XRD, SEM, EDS, and the optimal conditions were determined. The dissolved arsenic was removed by precipitation with Fe2（804）3 and the solution was neutralized with lime. Comparing the biogenetic Fe2（SO4）3 to the chemical Fe2（SO4）3 in the arsenic removal efficiency, it can be found that the biogenetic Fe2（SO4）3 was a better precipitator.

关 键 词：铜砷滤饼 浸出 生物氧化 沉淀 

分 类 号：TQ015.9[化学工程] TP391.9[自动化与计算机技术—计算机应用技术]