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采用次氯酸钠浸出方法降低含砷铜矿中的砷含量。最佳工艺条件为:温度30℃、粒度54~74μm、NaClO浓度0.39mol/L、NaOH用量为矿样的1.67%、时间90min、液固比40∶1(mL/g),砷浸出率为47.53%。微波场和辉光放电等离子体场辅助次氯酸钠浸出,砷浸出率分别为66%、72.88%,处理后铜矿中砷含量分别降至0.15%、0.12%,均满足铜精矿二级品砷含量的指标要求。
Abstract：Arsenic content was reduced by leaching arsenic-bearing copper ore with sodium hypochlorite under alkaline oxidizing condition.The results show that arsenic leaching rate is 47.53% under the optimum conditions including temperature of 30 ℃,particle size of 54~74μm,sodium hypochlorite concentration of 0.39mol/L,sodium hydroxide dosage of 1.67% of sample ore,leaching time of 90 min,and ratio of liquid to solid of 40∶1(mL/g).Arsenic leaching rates of sodium hypochlorite leaching under microwave and low-pressure glow discharge plasmas are 66% and 72.88% respectively,while arsenic content in treated copper ore is reduced to 0.15% and 0.12% respectively,which meets arsenic index requirement of second grade copper concentrates.
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基本信息:
中图分类号:TF811
引用信息:
[1]赵卓英,齐越,杜冬云.微波和等离子体辅助次氯酸钠浸出含砷铜矿脱砷工艺[J].有色金属(冶炼部分),2015(07):8-12+16.
基金信息:
湖北省科技支撑计划(湖北省重金属污染控制技术工程中心平台项目)(2014BEC029)
2015-07-12
2015-07-12