摘要
依据沉淀浮选法的基本原理,提出了从废酸中回收RE_2O_3的方法.用Na_2SO_4作沉淀剂,与RE^(3+)形成溶解度小的RE_2(SO_4)_3·xNa_2SO_4·yH_2O复盐;用月桂胺作捕收剂浮选回收,RE_2O_3的回收率达98％以上。用(NH_4)_2SO_4作沉淀剂分离废酸中的Ca^(2+),去除率达99％,从而使浓度为2mol/L的HCl废酸能循环使用。
In water or acid liquid that containing RE3+ Na2SO4 was used as a precipitant, which would .react with RE and fom RE2(SO4)3.xNa2SO4.yH2O, a complex salt. Then by using lauric amine as a collector, RE2O3 was recove-red, the recovery rate got above 98%. In order to separate Ca2+ in waste acid, (NH4)2SO4 was used as a precipitant, by which the removal rate attained 99%. After revovering rare earth and removing Ca2+ in waste acid, the renewed acid can be reused.
出处
《环境科学》
EI
CAS
CSSCI
CSCD
北大核心
1991年第1期44-46,68,共4页
Environmental Science
关键词
稀土元素
沉淀浮选
捕收剂
recovery of rare earth, waste acid, precipitation, flotation.
