铅锌尾矿库中黄药对水合氢氧化铁形成的影响

Effect of Xanthate on the Formation of Hydrous Ferric Oxide in Lead-zinc Tailings Reservoir

对铅锌尾矿库中的尾矿进行模拟淋溶实验,试验结果表明,当铁离子含量为200 mg/L、黄药含量为100 mg/L的淋滤溶液经过填充有颗粒物的淋溶柱后,浸出溶液中铁的含量分别<0.01 mg/L,黄药的含量<1 mg/L。加入黄药后的酸性含铁废水与尾矿中的具有酸缓冲能力的矿物发生中和反应,pH值升高,形成水合氢氧化铁沉淀,但形成的水合氢氧化铁与未加黄药形成的水合氢氧化铁在形成的位置和形成的形态上有所差异。

In this study,simulated leaching experiments were conducted on the tailings in lead-zinc tailings ponds.The experimental results showed that the leaching solution containing 200 mg/L ferric ion and 100 mg/L xanthate was filled with tailings particles.After the column was dissolved,the content of iron in the leached solution was less than 0.01 mg/L,and the content of xanthate was less than 1 mg/L.The acidic iron-containing wastewater after adding the xanthate underwent a neutralization reaction with minerals having acid buffering capacity in the tailings,and the pH value increased to form hydrated ferric hydroxide precipitate,but the formed hydrated ferric hydroxide was formed with no xanthate added.The hydrated ferric hydroxides differ in the formation position and morphology.