铜电解液碳酸钡脱铋新工艺

New process of bismuth removal from copper electrolyte with barium carbonate

对铜电解液碳酸钡脱铋工艺进行研究,提出机械活化盐酸催化的铜电解液碳酸钡脱铋新工艺,其工艺过程为:将碳酸钡粉末加水调和研磨制浆后,再加入适量盐酸到碳酸钡浆料中作催化剂,待铜电解液预热到80℃左右加入碳酸钡料浆,搅拌1 h后过滤。实验结果表明,采用碳酸钡脱铋新工艺,1 m3铜电解液加入10 kg碳酸钡,用0.1 L盐酸(HCl 27%)作催化剂,Bi的脱除率可达70%,脱铋渣含Bi量大于4%。与传统碳酸钡脱铋工艺相比较,新工艺净化1 m3铜电解液节省碳酸钡40 kg,脱铋渣中Bi含量增加3倍。

The process of bismuth removal from copper electrolyte with barium carbonate was studied. The new process of bismuth removal from copper electrolyte with barium carbonate was proposed. In the process, barium carbonate powder was first ground with water in a colloid mill, then hydrochloric acid as catalyst was added into the slurry, which was added in the copper electrolyte heated to about 75 ℃ under stirring condition. After stirring for 1 h, filtration was performed. The experimental results show that, by the process, 10 kg barium carbonate with 0.1 L hydrochloric acid （HCl 27%） as catalyst is added in 1 ms copper electrolyte, 70% Bi can be removed from the electrolyte, and the Bi content in filter residue is more than 4%. Compared with the conventional process of bismuth removal from copper electrolyte with barium carbonate, 40 kg barium carbonate is saved when 1 m^3 copper electrolyte is purified by the new process of bismuth removal, and the Bi content in the filter residue increases 3 times.