As-NaOH-ClO-体系脱砷试验

Study on Removal of Arsenic in As-NaOH-ClO~- System

提出了在As-NaOH-ClO体系脱砷的方法,并以含砷镍烟灰为原料,系统研究了该体系下的脱砷效果。结果表明:在液固比L/S=10、NaClO浓度4.1%、NaOH浓度3%、反应温度50℃、反应时间1h的最优条件下,砷脱除率达到75%以上,镍损失率小于0.03%,可实现砷的无害化处理和金属镍的回收。

A method to remove arsenic in As-NaOH-ClO~-system was proposed.Arsenic removal effect was investigated with arsenic-bearing nickel dust as raw material.The results show that arsenic removal rate is 75%above and nickel loss ratio is 0.03% below under the optimum conditions including L/S=10,NaClO concentration of 4.1%,NaOH concentration of 3%,reaction temperature of 50 ℃,and reaction time of 1 h.Harmless treatment of arsenic and recovery of nickel metal are realized.