摘要
软锰矿烟气脱硫尾液的主要成分为硫酸锰,其中也含有Cu2+、Zn2+、Co2+、Ni 2+、Pb2+、Cd2+等重金属离子,在回收硫酸锰之前必须除杂。从理论上分析了用锰粉置换法去除重金属离子的可行性,探讨了温度、锰粉投加量及搅拌速度对重金属去除率的影响。结果表明:反应最佳温度为75℃,温度太高反而不利于反应进行;搅拌速度对重金属去除率的影响具有局限性,过快或过慢都不利于反应进行,最佳搅拌速度为250r/min;除Pb2+外,锰粉投加量越大,置换去除率越高。
The main composition of desulfurization solution of flue gas is manganese sulfate.In the solution,there are Cu2＋、Zn2＋、Co2＋、Ni 2＋、Pb2＋、Cd2＋and other heavy metal impurities which should be removed before recycling manganese sulfate.The of removing the heavy metal ions by replacement method using manganese powder was discussed.The influence of temperature,dosing of manganese powder and stirring speed on the removal rate of heavy metal ions were examined.The result shows that the optimal reaction temperature is 75℃,high temperature is not favorable for the reaction.The effect of stirring speed on removal rate of heavy metal ions is limited,both too fast or too slow stirring speed are not favorable for the reaction,the best stirring speed is 250r/min.Except for Pb2＋,the removal rate of other heavy metal ions increases with the increase of manganese power dosing quantity.
出处
《湿法冶金》
CAS
北大核心
2014年第4期317-319,327,共4页
Hydrometallurgy of China
基金
国家自然科学基金资助项目(51374150
51304140)
四川省杰出青年基金资助项目(2011JQ0008)
关键词
硫酸锰溶液
锰粉
重金属离子
置换反应
去除
sulfate manganese solution
manganese powder
heavy metal ion
replacement reaction
removing
