摘要
开发了用NH3 NH4 Cl水溶液浸出炼铅炉渣烟化炉氧化锌烟灰制取高纯锌的新工艺。Zn的浸出率>96 % ,浸出液加H2 O2 后净化除Sb和As,然后采用加锌粉两段逆流除Cu ,Cd ,Pb ,电积过程中电能消耗 2 5 0 0～ 2 70 0kW·h/t。电锌含Zn >99.999% ,杂质元素Cu ,Cd ,Co ,Ni,Fe,As ,Sb均小于 0 .0 0 0 1% ,Pb <0 .0 0 0 3%。
A new process of using ammonia and ammonium chloride solution to leach zinc oxide fume dusts and electrowinning high purity zinc was explored successfully. The leaching rate of zinc was more than 96%. The As and Sb in the filtrate were removed by adding H 2O 2 and others, and Cu, Cd and Pb were removed by adding zinc powder with two stage countercurrent. During electowinning the electrical energy consumption ranged from 2?500 to 2?700?kW·h/t. The zinc content in the eletrowinned zinc is more than 99.999%, and the contents of impurities Cu, Cd, Co, Ni, Fe, As, Sb are all lower than 0.000?1%, but lead is lower than 0.000?3%?
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2001年第6期1110-1113,共4页
The Chinese Journal of Nonferrous Metals
关键词
高纯锌
氨
氯化铵
氧化锌烟灰
炼铅
high purity zinc
ammonia
ammonium chloride
zinc oxide fume dusts
