(1. 中南大學(xué) 冶金科學(xué)與工程學(xué)院，長沙 410083；
2. 江西銅業(yè)公司 貴溪冶煉廠， 貴溪 335424)
摘 要: 對銅電解液碳酸鋇脫鉍工藝進(jìn)行研究， 提出機(jī)械活化鹽酸催化的銅電解液碳酸鋇脫鉍新工藝， 其工藝過程為： 將碳酸鋇粉末加水調(diào)和研磨制漿后， 再加入適量鹽酸到碳酸鋇漿料中作催化劑， 待銅電解液預(yù)熱到80 ℃左右加入碳酸鋇料漿， 攪拌1 h后過濾。 實(shí)驗(yàn)結(jié)果表明， 采用碳酸鋇脫鉍新工藝， 1 m3銅電解液加入10 kg碳酸鋇， 用0.1 L鹽酸(HCl 27%)作催化劑， Bi的脫除率可達(dá)70%， 脫鉍渣含Bi量大于4%。 與傳統(tǒng)碳酸鋇脫鉍工藝相比較， 新工藝凈化1 m3銅電解液節(jié)省碳酸鋇40 kg， 脫鉍渣中Bi含量增加3倍。
關(guān)鍵字: 碳酸鋇； 銅電解精煉； 溶液凈化
（1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;
2. Guixi Smelter, Jiangxi Copper Corp., Guixi 335424, China）
Abstract: 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 m3 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 m3 copper electrolyte is purified by the new process of bismuth removal, and the Bi content in the filter residue increases 3 times.
Key words: barium carbonate; copper electrorefining; solution purification
