银锌渣制备高纯氧化铋除铅银的研究  

Removal of Pb and Ag in Preparation of High Purity Bi_2O_3 from Silver-zinc Slag

作　　者：龚竹青[1] 李景升[1] 郑雅杰[1] 杨兴文 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083 [2]江西铜业公司,江西贵溪3354241

出　　处：《矿冶工程》2004年第5期45-48,共4页Mining and Metallurgical Engineering

摘　　要：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 。Bi 2O 3 solution was obtained by leaching silver-zinc slag with HCl-NaClO 3-NaCl solution. Pb 2+ and Ag+ were up to 1?371 mg/L and 46.1 mg/L in BiCl 3 solution respectively. Pb 2+ and Ag+ in the solution were removed respectively by silver-zine slag and NaI. Pb 2+ and Ag+ in the solution were decreased to about 1 mg/L under the conditions that the mass ration of BiCl 3 solution to silver-zine slag was 10∶1; the intial pH, 0.3～0.4; the agitation speed, 1?000 r/min; the reaction time, no more than 15 mins; and the addition amount of NaI, 1.2～1.4 times of the theoretical amount. High purity Bi 3O 2 was prepared from the deleaded and desilvered BiCl 3 solution by hydrolysis and conversion.

关 键 词：银锌渣 BiCl3溶液 除铅 除银 高纯三氧化二铋 

分 类 号：TF111[冶金工程—冶金物理化学]