Recovery and Refining of Precious Metals

This book is the product of forty years of hands-on physiochemical work with both ferrous and nonferrous metals and with the metallurgy of refining. extracting. and casting. Its purpose is to cover the various methods of recovery and refining of precious metals. Both primary sources-placer gold. black sand. and ores-and secondary sources­ scrap jewelry. electronic scrap. old films. buffings. spent plating and stripping solutions. catalytic automobile converters. and old eyeglass frames-are cove

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