摘要
对某锌厂含钴废渣硫酸化焙砂浸出液进行了钴与铁、锰分离工艺研究。研究表明 ,焙砂用水浸出时延长时间为 3.5h,可使大量铁以黄铁矾的形式除去 ,再控制溶液 p H3～ 3.5,温度 1 0 0°C,时间 1 h的条件下 ,采用针铁矿法除铁 ,铁的去除率可达 99.5% ,然后控制溶液 p H4～ 4.5,温度1 0 0°C,用 1 0 % ( NH4 ) 2 S2 O8溶液氧化 Mn2 + 为沉淀而除去 ,锰的去除率为 99.8% ,同时还可氧化Fe2 +达到深度除铁的目的 ,铁的总去除率达 99.9%。在此过程中 ,钴的损失率仅为 2 .5% 。
A new process was developed for the separation of cobalt, iron and manganese in the leach solution of zinc plant residue after sulphated calcination. In the water leach stage, large amount of iron could be separated in the form of ammonium jarosite if the leach time was prolonged to 3.5 h, then under pH 3~3.5 and 100°C for 1 h, more iron was eliminated in goethite form, the separation efficiency of the two process was 99.5%. A total of 99.8% of manganese was removed by 10% (NH 4) 2S 2O 8 solution under pH 4~4.5 and 100°C. In the meanwhile, ferrous iron was oxidized to goethite and the total separation efficiency of iron could reach 99.9%. The loss of cobalt in the process was only 2.5%.
出处
《化学世界》
CAS
CSCD
北大核心
2001年第6期289-290,305,共3页
Chemical World
