含钴废渣硫酸化焙砂浸出液中钴_铁_锰分离研究.pdf

6 289 , ( , 410083) : 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 , 焙砂用水 浸出时延长时间为3. 5 h, 可使大量铁以黄铁矾的形式除去, 再控制溶液pH 3 ～3. 5, 温度100°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pH 4 ～4. 5, 温度 2+ 100°C, 用 10% ( NH4) 2S2 O8 溶液氧化Mn 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%, 取得了令 人满意的结果。 4 2 2 8 : 黄铁矾法除铁; 针铁矿法除铁; ( NH ) S O 氧化沉淀法除锰 : TF 816. 03; T F 803. 25: A : 0367 6358( 2001) 06 0289 03 Study on the Separation of Cobalt Iron and Manganese from, the Leach Solution of Sulphated Calcined Cobalt Residue WANG Yan, ZHOU Chun shan ( Cent ral S out h Unive rs ity of T echnol ogy , H unan Chang sha 410083, Ch ina) Abstract: A new process was developed for the separation of cobalt, iron and manganese in the leach solu tion of zinc plant residue after sulphated calcination In the water leach stage large amount of iron could. , 3. 5 , 3 be separated in the form of ammonium jarosite if the leach time was prolonged to h then under pH 3. 5 and 100 C for 1h, more iron was eliminated in goethite form, the separation efficiency of the two pro 4 2 2 8 cess was 99. 5%. A total of 99. 8% of manganese was removed by 10% ( NH ) S O 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% . T he loss of cobalt in the process was only 2. 5% . Key words : separation of iron in ammonium jarosite form separation of iron in goethite form se