Study on new low-temperature smelting process of antimony bismuth slag
GAO Xiao-ting1,2, LU Su-jun1,2, OU Xiao-jian1,2, ZHANG Peng1,2, SUN Ge3, ZHAN Xin4
1. Nickel and Cobalt Resources Comprehensive Utilization of State Key Laboratory, Jinchang 737100, Gansu, China; 2. Metallurgy and Environmental Engineering Institute,Jinchuan Nickel and Cobalt Research and Design Institute, Jinchang 737100, Gansu, China; 3. Security Department, Lanzhou Jinchuan Science Park Co., Ltd., Jinchang 737100, Gansu, China; 4. Security Management Department, Engineering Construction Company of Jinchuan Group, Jinchang 737100, Gansu, China
Abstract：In order to solve the problems existing in the traditional smelting process of bismuth metal, such as long process flow, large discharge of high salt wastewater and low grade of bismuth products, a new method for treating antimony-bismuth slag by low-temperature smelting was put forward, and the laboratory study was carried out. The results showed that the new low-temperature smelting process can be used to treat antimony bismuth slag, which can effectively realize the separation of antimony and bismuth, and produce high bismuth alloy containing more than 77% bismuth and less than 3% antimony. Under the optimal technological conditions of flux rate of 30%, reducing agent rate of 3%, holding time of 60 min and reaction temperature of 1 050 ℃, the direct yield of bismuth reached more than 99%, and the removal rate of antimony was over 95%. The low-temperature smelting process was short and the metal direct yield was high, which can effectively solve the separation problem of antimony and bismuth, and provide a good idea for the resource utilization of bismuth-containing waste slag. A green, economical and environmentally friendly process for antimony and producing bismuth from bismuth slag was proposed.
高晓婷, 卢苏君, 欧晓健, 张鹏, 孙戈, 詹欣. 锑铋渣低温熔炼新工艺研究[J]. 中国冶金, 2021, 31(1): 64-67.
GAO Xiao-ting, LU Su-jun, OU Xiao-jian, ZHANG Peng, SUN Ge, ZHAN Xin. Study on new low-temperature smelting process of antimony bismuth slag[J]. China Metallurgy, 2021, 31(1): 64-67.
2021, Vol. 31 
