【摘 要】
：
The microwave is a clean and environmentally acceptable energy.Various microwaveassisted metal extraction processes have been developed.The novel applicatio
【机 构】
：
School of Materials and Metallurgy Engineering, Northeastern University, Shenyang 110004, China
【出 处】
：
第五届国际湿法冶金学术会议(5th International Conference on Hydrometallurg
论文部分内容阅读
The microwave is a clean and environmentally acceptable energy.Various microwaveassisted metal extraction processes have been developed.The novel application of microwave irradiation for sulphation of the nickel laterite ore prior to pressure acid leaching has been investigated.Under the optimum conditions, 99% of the nickel can be extracted from the ore.Above 90% of the iron precipitates as hematite and the residual acid content in the leachate is lower than 31 g/L.The microwave sulphation proceeds rapidly and a relative low leaching temperature and low mass ratio of sulfuric acid to ore can be used in the subsequent pressure leaching to achieve a satisfied nickel extraction.This may potentially reduce the subsequent heavy capital and operation cost of the pressure acid leaching process.
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