皂化渣固化电解锰渣机理及毒性浸出研究

Study on mechanism and toxicity leaching of saponified slag solidified electrolytic manganese slag

基于“以废治废”思路,以皂化渣固化电解锰渣,不同固化方法的毒性浸出对比表明,30%皂化渣+3%生石灰复合,可实现对电解锰渣的无害化处理,SEM结果显示,经皂化渣和生石灰固化处理后,含锰的颗粒状矿物向更稳定的块状转变,有效的将各组分胶结在一起,从而抑制了Mn^(2+)的浸出。最后,通过柱浸试验验证了本研究固化方法的长期环保特性。

Based on the idea of“treating waste with waste”,the comparison of toxic leaching of electrolytic manganese slag with saponified slag curing by different curing methods shows that 30%saponified slag+3% quicklime could achieve harmless treatment for electrolytic manganese slag.The SEM results showed that after the saponified slag and quicklime were solidified,the manganese containing granular minerals are changing to more stable blocks,effectively cementing the components together,thus inhibiting the leaching of Mn^(2+).Finally,the long-term environmental protection characteristics of this curing method were verified by column immersion test.