A soft-solution process for recovering rare metals from metal/alloy-wastes by grinding and washing with water

Journal of Hazardous Materials
Qiwu ZhangFumio Saito

Abstract

We have developed a novel process for recovering metals from alloy-wastes by using a mechanochemical (MC) reaction. The process consists of co-grinding both alloy and polyvinyl chloride (PVC) samples, followed by washing with water and filtration. The co-grinding of the wastes causes a solid-state MC reaction to form metal chlorides and hydrocarbon in the product. The former products are soluble in water, so they can be recovered from the wastes by washing with water, followed by filtration. The PVC waste plays a significant role as a chlorine source in the MC reaction. After filtration, the solid residue can be used as a fuel, due to the absence of chlorine in the product, and the filtrate is subjected to hydrometallurgical process to extract metals from the solution.

References

Jan 5, 2002·Environmental Science & Technology·Q ZhangK Hatakeda

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Citations

Mar 6, 2012·Environmental Science & Technology·Wenyi YuanFumio Saito
Aug 19, 2015·Environmental Science. Processes & Impacts·Zhiyuan OuZhishi Wang
Apr 18, 2015·Environmental Science & Technology·Quanyin Tan, Jinhui Li

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