用氧化锌烟灰制备饲料级氧化锌  

Preparation of Feed Grade Zinc Oxide from Zinc Oxide Fume Dust

作　　者：朱庆楼[1] 童张法[1] 陈志传[2] 

机构地区：[1]广西大学化学化工学院,广西南宁530004 [2]深圳市危险废物处理站有限公司,广东深圳518049

出　　处：《化工环保》2010年第3期250-253,共4页Environmental Protection of Chemical Industry

摘　　要：以锌冶炼厂氧化锌烟灰为原料,经NH3-NH4HCO3溶液浸取、Zn粉置换除杂、用自制偏钛酸吸附除A s等工序制备饲料级氧化锌。实验结果表明:氧化锌烟灰在NH3-NH4HCO3溶液中于40℃浸取2h,Zn浸出率可达96%~98%;当偏钛酸加入量为12.5g/L、吸附1h时,产品中A s的质量分数低于0.000 3%。采用该工艺制得的饲料级氧化锌符合HG/T2792—1996《饲料添加剂氧化锌》的质量标准。Using zinc oxide fume dust from zinc smeltery as raw material,the feed grade zinc oxide was prepared via NH3-NH4HCO3 solution leaching,zinc powder displacing purification and self-made metatitanic acid(TiO2·xH2O) adsorbing As.When NH3-NH4HCO3 solution temperature is 40 ℃ and leaching time is 2 h,zinc leaching rate is 96%-98%;When the dosage of metatitanic acid is 12.5 g/L and the adsorption time is 1 h,the mass fraction of As in the product is below 0.000 3%.The quality of the product can meet the standards of HG/T2792-1996.

关 键 词：氧化锌烟灰 偏钛酸 除砷 饲料级氧化锌 综合利用 

分 类 号：TQ132.4[化学工程—无机化工]