Recovery of Molybdenum from Copper Slag
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- Category: Molybdenum knowledge
- Published on 20 June 2013
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The feasibility of the recovery of molybdenum from copper slag as Fe-Mo alloys by carbon reduction is investigated in the present work. Molybdenum in copper slag is found to be fully recovered as Fe rich alloy. The recovered Fe rich alloy contains about 0.65mass% molybdenum and 2.4 mass% copper.
Slag as by-product of copper making has been produced in large amounts in Chile, and around 5 million tons of slag are estimated to be disposed every year and 40 to 45 million tons have been accumulated.
Typical Chilean Cu slag contains about 0.3 mass% molybdenum which is the grade of primary mine production of molybdenite and it also contains about 40 mass% of Fe and I mass% Cu. Recovery of ivlo from Chilean copper slag is quite attractive to secure a stable molybdenum supply.
In addition, to use the recovered Fe-Mo alloy in the special steel industry, which is the most important market for molybdenum, Cu in the produced Fe-Mo alloy is successfully decreased from 2.4 mass% to 0.1 mass% by using FeS-Na2S flux. Thus, molybdenum recovery from Chilean copper slag can be promising.
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