电解锰渣的无害化处理实验

Electrolytic Manganese Slag Harmless Treatment Experiment

选取湖北某锰矿区的电解锰渣(EMR),通过稳定化实验和淋滤实验探究了电解锰渣两种无害化处理途径。稳定化实验结果表明:生石灰对EMR中Mn^(2+)和NH_(4)^(+)的去除效果优于高炉矿渣、市政污泥及各类磷酸盐,生石灰添加质量分数大于10%时才能将EMR中Mn^(2+)和NH_(4)^(+)的质量浓度降至标准限值以下,稳定化效率最高分别达到100%与99.17%,而EMR的pH会高于标准限值。淋滤实验结果表明:采用去离子水和柠檬酸作为浸提剂对EMR淋洗5 d后,EMR中Mn^(2+)和NH_(4)^(+)的质量浓度均低于标准限值,Mn^(2+)和NH_(4)^(+)去除率最高分别为99.95%与99.49%,同时保证EMR的pH在限值范围内。

Two harmless treatment methods for electrolytic manganese slag(EMR)from a manganese mine area in Hubei Province were explored through stabilization experiments and leaching experiments.The results of the stabilization experiment showed that the removal effect of quicklime on Mn^(2+)and NH_(4)^(+)in EMR was better than that of blast furnace slag,municipal sludge,and various phosphates.Only when the mass fraction of quicklime added was greater than 10%,could the mass concentration of Mn^(2+)and NH_(4)^(+)in EMR be reduced to below the standard limit.The highest stabilization efficiency reached 100%and 99.17%,respectively,while the pH of EMR would be higher than the standard limit.The results of the leaching experiment showed that after 5 days of leaching EMR with deionized water and citric acid as leaching agents,the mass concentrations of Mn^(2+)and NH_(4)^(+)in EMR were lower than the standard limit,and the highest removal rates of Mn^(2+)and NH_(4)^(+)were 99.95%and 99.49%,respectively,while ensuring that the pH of EMR was within the limit range.