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A Pyrometallurgical Method for Processing Ni-cd Scrap Batteries.
MISSING :14 pages
As part of a continuing effort to maximize metal recovery from domestic secondary resources, the Bureau of Mines investigated a process for recovering the metallic portion of scrap alkaline batteries. A pyrometallurgical method for recovering nickel and cadmium from ni-cd scrap batteries previously developed on a laboratory scale, was scaled up to 25- and 43-pound charges. The method employed reduction and/or decomposition in a retort using a minimum of 2.5 percent carbon as a reductant. Metallic cadmium was distilled at atmospheric pressure and a minimum of 900 deg c. Purity of the recovered cadmium was 99.8 percent minimum and the nickel-iron residue contained less than 0.02 percent cadmium.
IH; Report of Investigation;
Page last reviewed: September 2, 2020
Content source: National Institute for Occupational Safety and Health Education and Information Division