从除钼渣中回收铜、钼新工艺的研究

【作者】 唐忠阳；

【导师】 李洪桂； 霍广生；

【作者基本信息】 中南大学 ， 有色金属冶金， 2002， 硕士

【摘要】 本论文全面总结了从除钼渣中综合回收铜、钼、钨的研究成果,提出了处理除钼渣的碱分解—萃取新工艺。 在碱分解过程中,重点研究了碱用量对浸出率的影响,常压下、90°C、碱用量为理论量的1倍时,98%以上的钼进入溶液,99%以上的铜进入渣相,铜钼实现了有效分离。在萃取过程中,以N₂₃₅作为萃取剂的萃取体系对浸出液中钼的萃取率达99%以上。同时,还研究了氨水浓度和反萃时间对反萃率的影响,在氨水浓度为1:2,反萃时间20min时,反萃率达98%以上。 实验表明,碱分解—萃取工艺处理除钼渣是可行的,在一定条件下,铜和钼的总回收率分别达到99%以上和95.6%,该工艺对于探索用冶金方法从废料中回收钼等有价元素,保证我国钼冶金工业的可持续发展具有较大的意义。更多还原

【Abstract】 Recovery copper and molybdenum from low grade molybdenum slag has been studied, and a new NaOH digestion and liquid-liquid extraction process has been developed.In the stage of NaOH digestion, the infleunce of NaOH consumption and temperature on the recovery of Molybdenum has been studied .At 90℃ , and the NaOH comsuption of stiochiometric amount, more than 98% of the Molybdenum can be leached and more than 99% of the copper remained in the residue. In the stage of liquid-liquid extraction,the extraction rate of molybdenum up to 99% can be reached with the extractant N₂35. At the same time, the infleunce of ammonia concentration and strip time on the strip rate has also been studied. With ammonia concentration of 1:2,strip time 20 minutes,a strip rate of 98% has been obtained.It is indicated that the NaOH digestion and liquid-liquid extraction process is feasible, and the recovery of copper and molybdenum are more than 99% and 95.6% respectively. This process will make positive contribution to searching the way for recycling molybdenum from waste material and ensuring the continually development of Chinese molybdenum metallurgical industry.更多还原