铜冶炼渣硫酸浸出回收铜试验研究

发布时间：2018-05-27 17:41

  本文选题：铜冶炼渣 + 硫酸浸出　； 参考：《矿产综合利用》2017年06期

【摘要】：以硫酸溶液为浸出剂,采用常压氧化浸出法处理铜冶炼渣以回收渣中有价金属铜。考察了浸出温度,浸出时间,硫酸浓度,浸出液固比,氧化剂(双氧水)添加量对铜浸出率的影响。试验结果表明:在未加入氧化剂时,主要发生的是铜氧化物的简单酸溶反应,硫化铜几乎不溶于浸出液,因此铜浸出率很低;而随着氧化剂添加量的增加硫化铜被氧化浸出,因此铜浸出率增加很明显。此外,铜浸出率随着浸出温度,浸出时间和浸出液固比的增大而增大。浸出过程最佳的条件为:浸出温度70℃,时间180 min,硫酸浓度2 mol/L,液固比8∶1,氧化剂(双氧水)添加量400 m L/kg。铜浸出率可达到91.2%。通过对浸出渣XRD和SEM-EDS分析可得浸出渣中主要的矿物为磁铁矿。在磁场为2T的条件下,浸出渣磁选可以得到品位53.15%的铁精矿。
[Abstract]:Copper smelting slag was treated with sulfuric acid solution as leaching agent and oxidized leaching method at atmospheric pressure to recover valuable metal copper from slag. The effects of leaching temperature, leaching time, sulfuric acid concentration, leaching liquid-solid ratio and the amount of oxidant (hydrogen peroxide) on the leaching rate of copper were investigated. The results show that the simple acid dissolution reaction of copper oxide occurs without adding oxidant, and copper sulfide is almost insoluble in leaching solution, so the leaching rate of copper is very low, but with the increase of oxidant content, copper sulfide is oxidized and leached. Therefore, the copper leaching rate increased obviously. In addition, the copper leaching rate increases with the increase of leaching temperature, leaching time and leaching liquid / solid ratio. The optimum conditions are as follows: leaching temperature 70 鈩，

本文编号：1943187