Method for working-up waste products containing valuable metals
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United States of America Patent
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Nov 10, 1987
Grant Date -
N/A
app pub date -
Oct 27, 1986
filing date -
Feb 27, 1985
priority date (Note) -
Expired
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Abstract
The invention relates to a method for working-up valuable metal-bearing waste products, particularly but not exclusively copper scrap, containing a substantial amount of organic constituents, to a product form suitable for recovering the valuable-metal content, while expelling the organic constituents by pyrolysis and/or combustion in a reactor which rotates about its longitudinal axis and which is provided with a common reactor charging and reactor emptying opening. This invention is characterized in that, subsequent to expelling at least the major part of the organic content, the resultant residual products in the reactor are brought into close contact with a molten bath which is obtained from any metal-sulphide material and which contains at least a metal-sulphide phase or a metallic phase capable of dissolving at least the valuable-metal content of the residual product. Subsequent to dissolving and expelling respectively substantially all the material originally charged to the reactor, the metal values are recovered from the metal-sulphide phase and/or the metallic phase, in a suitable conventional manner.
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