添加剂对铜镍电镀污泥中重金属矿化的影响

Effect of additives on the mineralization of heavy metals in Cu-Ni electroplating sludge

采用矿化-分选工艺处理Cu、Ni含量分别为2.61%和2.28%的电镀污泥,研究了硫化剂、熔剂和助熔剂对铜镍电镀污泥中重金属矿化的影响.结果表明,适宜的硫化剂、熔剂分别为SJ和石英,两者适宜用量分别为20%,助熔剂硼砂适宜用量为2%.在上述添加剂条件下,当烟煤用量为15%、烧结温度为1 150℃、烧结时间为60 min时,精矿、尾矿产率分别为32.86%和59.48%,精矿铜、镍品位分别为6.96%和6.15%,回收率分别为87.63%和88.64%,尾矿铜、镍品位分别降低至0.54%和0.44%.

The heavy metal sludge with2.61%Cu and2.28%Ni was treated by mineralization-separation technology.It was studied systematically that the effects of sulfurizing agent,rhyolite and flux on the mineralization of heavy metals in Cu-Ni electroplating sludge.The results showed that the suitable sulfurizing agent,rhyolite and flux were SJ,quartz and borax respectively,and their suitable dosage were20%,20%and2%.Based on the above additives conditions and in the case of the bituminous coal dosage15%,the sintering temperature1150℃and the sintering time60min,the yields of concentrate and tailing were32.86%and59.48%respectively,and the grades of Cu and Ni in concentrates were6.96%and6.15%,and their recoveries were87.63%and88.64%,and the Cu and Ni grade in tailing reduced to0.54%and0.44%.