氨-硫酸铵法生产饲料级氧化锌中除砷工艺研究  

Study on arsenic removal in the preparation of feed grade zinc oxide by ammonia-ammonium sulfate method

作　　者：刘厚凡[1] 潘庆辉[1] 周新木[1] 夏国强 高长华[1] 

机构地区：[1]南昌大学化学系,江西南昌330031 [2]江西筐庐科技有限公司

出　　处：《无机盐工业》2008年第3期46-48,共3页Inorganic Chemicals Industry

基　　金：江西省教委基金资助项目(200048)

摘　　要：以锌焙砂和氨-硫酸铵溶液为原料生产饲料级高纯氧化锌,对除砷进行了重点研究。采用沉淀混凝吸附法,先用氧化剂氧化砷(Ⅲ)成砷(Ⅴ),再用沉淀吸附剂沉淀砷(Ⅴ)。结果表明,温度为60℃,砷与氧化剂及沉淀吸附剂的物质的量比为1.0∶1.2∶1.2,搅拌浸出2 h,静置1 h,除砷效果最好。通过除砷所得氧化锌产品各项指标都符合HG 2792—1996标准。革新了氨法生产氧化锌的除砷工艺。This paper primarily studied the removal of arsenic in the preparation of high -purity feed -grade zinc oxide with zinc calcine and ammonia - ammonium sulfate solution as raw materials. In this process the sedimentationflocculation - adsorption technology is adopted to oxidize As^3＋ into As^5＋ at first, which is then deposited under the action of absorption precipitant. The results showed that arsenic is utmost removed under the following conditions： temperature is 60℃ ,amount - of - substance ratio of arsenic to oxidant to absorption precipitant is 1： 1.2： 1.2, leaching time （ under stirring） is 2 h and settling time is 1 h. This process produced qualified zinc oxide which is in compliance with standards of HG 2792--1996. The arsenic removal technique is thereby renovated in the preparation of zinc oxide with ammonia method.

关 键 词：氨-硫酸铵 氧化锌 沉淀昆凝吸附 除砷 

分 类 号：TQ132.41[化学工程—无机化工]