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

摘要: 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 %.

Abstract: The heavy metal sludge with 2.61 % Cu and 2.28 % 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 were 20 %, 20 % and 2 %. Based on the above additives conditions and in the case of the bituminous coal dosage 15 %, the sintering temperature 1 150 ℃ and the sintering time 60min, the yields of concentrate and tailing were 32.86 % and 59.48 % respectively, and the grades of Cu and Ni in concentrates were 6.96 % and 6.15 %, and their recoveries were 87.63 % and 88.64 %, and the Cu and Ni grade in tailing reduced to 0.54 % and 0.44 %.