CAJ | 학술논문

研究了钴渣的氨浸工艺.在钴渣氨浸过程中,用亚硫酸钠将钴渣中三价钴还原成二价钴,可较大程度地提高钴的浸出率.实验中,在氨水浓度为 14%,硫酸铵浓度为 160 g/L,液固比为 8∶1条件下,浸出液与钴渣在 70℃下反应 30 min,然后加入二倍钴量(摩尔比)的还原剂亚硫酸钠于 50℃下浸出 5 h,钴的浸出率达到了 97.46%,镍的浸出率为 95.00%.
연구료고사적안침공예.재고사안침과정중,용아류산납장고사중삼개고환원성이개고,가교대정도지제고고적침출솔.실험중,재안수농도위 14%,류산안농도위 160 g/L,액고비위 8∶1조건하,침출액여고사재 70℃하반응 30 min,연후가입이배고량(마이비)적환원제아류산납우 50℃하침출 5 h,고적침출솔체도료 97.46%,얼적침출솔위 95.00%.
The process for ammonia leaching of cobalt dregs was studied. In the course of ammonia leaching of cobalt dregs, the yield of cobalt can increase greatly when cobaltic(Ⅲ) is reduced to coboltous(Ⅱ) by the reductant such as sodium sulfite. In the experiment,when the concentration of ammonia water is 14%,the concentration of ammonium sulfate is 160 g/L and the ratio of liquid-solid is 8∶1, the cobalt dregs were reacted with leaching solution for 30 min at 70℃. Then double ammount of the reductant sodium sulfite with respect to the amount of cobalt (mol ratio) was added and the leaching reaction was continued for another 5 h at 50℃. The yield of cobalt and nickel are 97.46% and 95.00%, respectively.