三种低品位氧化钴矿石浸出体系比较
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摘要
针对某铜钴矿区钴矿石 ,研究用硫酸、盐酸 -氯化钠、柠檬酸 -氟化氢铵浸出体系从低品位钴矿石中浸出钴。钴赋存于碳酸盐矿物、铁氧化物和具有吸附态的粘土矿物中。最佳浸出条件 :对硫酸体系是酸浓度 2 0 % ,浸出温度 70℃ ,浸出时间 8h ,固液比 1:5 ;对盐酸体系是酸浓度 10 % ,浸出温度 70℃ ,浸出时间 8h ,固液比 1:5 ,氯化钠加入量 5 % ;对柠檬酸—氟化氢铵体系是酸浓度 12 5 g/L ,浸出温度 15℃ ,浸出时间 4h ,固液比 1:10 ,氟化氢铵加入量 37 5 g/L。结果表明 :三体系的钴浸出率均可达到90 % ,其中柠檬酸 -氟化氢铵浸出体系具有省时、低温、对环境污染小等优点
The leaching process of cobalt from low grade cobalt ore in our country by using sulfuric acid, hydrochloric acid, and citric acid hydrofluoride as leaching reagents is studied The cobalt is in carbonate, ferric oxide and clay minerals The optimum leaching conditions for sulfuric acid system is acid concentration 20%, leaching temperature 70℃, retention time 8h, and ratio of solid to liquid 1∶5; for hydrochloric acid is acid concentration 10%, leaching temperature 70℃, retention time 8h, and ratio of solid to liquid 1∶5, salt addition 5%; and for citric acid fluoride is acid concentration 12 5g/L, leaching temperature 15℃, retention time 4h, and ratio of solid to liquid 1∶10, ammonium fluoride addition 37 5g/L The results show that the leaching rate of cobalt is up to 90% under optimum leaching conditions in three leaching systems The citric acid fluoride leaching system has advantages of saving time, low temperature and less pollution
The leaching process of cobalt from low grade cobalt ore in our country by using sulfuric acid, hydrochloric acid, and citric acid hydrofluoride as leaching reagents is studied The cobalt is in carbonate, ferric oxide and clay minerals The optimum leaching conditions for sulfuric acid system is acid concentration 20%, leaching temperature 70℃, retention time 8h, and ratio of solid to liquid 1∶5; for hydrochloric acid is acid concentration 10%, leaching temperature 70℃, retention time 8h, and ratio of solid to liquid 1∶5, salt addition 5%; and for citric acid fluoride is acid concentration 12 5g/L, leaching temperature 15℃, retention time 4h, and ratio of solid to liquid 1∶10, ammonium fluoride addition 37 5g/L The results show that the leaching rate of cobalt is up to 90% under optimum leaching conditions in three leaching systems The citric acid fluoride leaching system has advantages of saving time, low temperature and less pollution
引文
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