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Factors Research on the Influence of Leaching Rate of Nickel and Cobalt from Waste Superalloys with Sulfuric Acid
Kunming Institute of Precious Metals, Kunming, China
Sino-Platinum Metals Co. Ltd., Kunming, China
Sino-Platinum Metals Co. Ltd., Kunming, China
Sino-Platinum Metals Co. Ltd., Kunming, China
Kunming Institute of Precious Metals, Kunming, China
Sino-Platinum Metals Co. Ltd., Kunming, China
Kunming Institute of Precious Metals, Kunming, China
Kunming Institute of Precious Metals, Kunming, China
- 1 Kunming Institute of Precious Metals, Kunming, China
- 2 Sino-Platinum Metals Co. Ltd., Kunming, China
- 3 Sino-Platinum Metals Co. Ltd., Kunming, China
- 4 Sino-Platinum Metals Co. Ltd., Kunming, China
- 5 Kunming Institute of Precious Metals, Kunming, China
- 6 Sino-Platinum Metals Co. Ltd., Kunming, China
- 7 Kunming Institute of Precious Metals, Kunming, China
- 8 Kunming Institute of Precious Metals, Kunming, China
International Journal of Nonferrous Metallurgy·Volume 02 (2013)·Pages 63–67·Published 16 April 2013·DOI10.4236/ijnm.2013.22008
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Abstract
Unlike the reported leaching technologies of waste superalloys, the process of the “ atomized spray-sulfuric acid leach ing nickel and cobalt ” technology was put forward in the present work according to the compositions of waste superal loys. The effects of sulfuric acid temperature, concentration, leaching time, stirring speed and size of superalloys on leaching of Ni and Co from waste superalloys have been mainly investigated, and the optimum leaching conditions were determined and reported. The leaching rates for nickel and cobalt were 96.68% and 96.63%, respectively, and the contents of nickel and cobalt in leaching slag were 6.77% and 0.96%, respectively. The obtained leaching solution con taining Ni and Co could be used for production of Ni and Co products after removal.
KeywordsWaste SuperalloysAcid LeachingNickelCobaltLeaching Rate
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