摘要:
锰渣是电解金属锰过程产生的固体废弃物,年产量大,占用土地,危害环境,难以治理.为能大批量综合利用电解锰渣,实验研究了锰渣浸出液的污染物类型,考查了洗涤次数、搅拌时间、反应温度和液固比等对可溶性氨、硫和锰的去除效果.研究结果表明:锰渣中氨、硫和锰为主要污染物,毒性浸出液中氨含量为2873mg/l,硫含量为5357mg/l,锰含量为2417mg/l,在洗涤次数为4次、搅拌温度为室温、搅拌时间为40min、液固比为3∶1的条件下,锰渣内的可溶性氨、硫和锰洗出率为92.51%、88.12%、91.94%,为后续无害化处理过程奠定基础.
关键词:
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电解锰渣
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氨
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硫
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锰
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去除
Abstract:
Manganese tailing slags were generated by the process of electrolytic production of manganese metal,which took up lots of land yearly and were hard to be disposed,so they would do harm to environment.To use manganese tailing slag largely,the systematic research was carried on.The kinds of pollutants in the manganese tailing slags were disclosed,and the effect of water-washing times,stiring time,reaction temperature and liquid to solid phase ratio on the removal of ammonia,sulphur and manganese from manganese tailing slag had been done.Test results showed that the main pollutants (ammonia,sulphur and manganese),the ammonia content was 2873mg/L,sulphur content was 5357mg/L,and the manganese content was 2417mg/L in the toxic leaching solution.When the reaction temperature was 25℃,stirring time was 40mins,water-washing times was 4,and liquid to solid phase ratio was 3∶1,the removal rate of pollutants (ammonia,sulphur and manganese) arrived at 92.51%,88.12% and 91.94% respectively,which would provide solid foundation for subsequent process of harmless treatment.
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