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银锌渣经HCl NaClO3 NaCl溶液浸取得到BiCl3 溶液 ,BiCl3 溶液中的Pb2 + 和Ag+ 含量分别高达 13 71.4mg/L和 46.1mg/L。在此BiCl3 溶液中 ,采用银锌渣除Pb2 + 、Nal除Ag+ ,当银锌渣除铅条件为液固比 10∶1、起始pH值 0 .3～ 0 .4、搅拌速度 10 0 0r/min、反应时间不超过 15min、加入NaI的量为理论量的 1.2～ 1.4倍除银铅时 ,溶液中的Pb2 + 和Ag+ 降到 1mg/L左右 ,将除Pb2 + 、Ag+ 后的BiCl3 溶液水解、转化可以制得高纯Bi2 O3 。
The results show that the content of Pb2 + and Ag + in BiCl3 solution is up to 13 71.4 mg / L and 46.1 mg / L, respectively. In this BiCl3 solution, the removal of Pb2 +, Nal addition of Ag + silver and zinc slag, when the silver and silver slag removal of lead-liquid-solid ratio of 10: 1, the initial pH value of 0 .3 ~ 0 .4, stirring speed 10 0r / min, the reaction time does not exceed 15min, the amount of added NaI 1.2 to 1.4 times the theoretical amount of silver and lead, the solution of Pb2 + and Ag + down to about 1mg / L, except Pb2 +, Ag + BiCl3 solution Hydrolysis, conversion can be obtained high purity Bi2 O3.