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Title: Process for removing copper in a recoverable form from solid scrap metal

A process for removing copper in a recoverable form from a copper/solid ferrous scrap metal mix is disclosed. The process begins by placing a copper/solid ferrous scrap metal mix into a reactor vessel. The atmosphere within the reactor vessel is purged with an inert gas or oxidizing while the reactor vessel is heated in the area of the copper/solid ferrous scrap metal mix to raise the temperature within the reactor vessel to a selected elevated temperature. Air is introduced into the reactor vessel and thereafter hydrogen chloride is introduced into the reactor vessel to obtain a desired air-hydrogen chloride mix. The air-hydrogen chloride mix is operable to form an oxidizing and chloridizing atmosphere which provides a protective oxide coating on the surface of the solid ferrous scrap metal in the mix and simultaneously oxidizes/chloridizes the copper in the mix to convert the copper to a copper monochloride gas for transport away from the solid ferrous scrap metal. After the copper is completely removed from the copper/solid ferrous scrap metal mix, the flows of air and hydrogen chloride are stopped and the copper monochloride gas is collected for conversion to a recoverable copper species.
Inventors:
 [1];  [1];  [1]
  1. (Albany, OR)
Issue Date:
OSTI Identifier:
869738
Assignee:
United States of America as represented by Secretary of (Washington, DC) NETL
Patent Number(s):
US 5387273
Research Org:
National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
Country of Publication:
United States
Language:
English
Subject:
process; removing; copper; recoverable; form; solid; scrap; metal; ferrous; mix; disclosed; begins; placing; reactor; vessel; atmosphere; purged; inert; gas; oxidizing; heated; raise; temperature; selected; elevated; air; introduced; thereafter; hydrogen; chloride; obtain; desired; air-hydrogen; operable; chloridizing; provides; protective; oxide; coating; surface; simultaneously; oxidizes; chloridizes; convert; monochloride; transport; completely; removed; flows; stopped; collected; conversion; species; solid ferrous; ferrous scrap; oxide coating; reactor vessel; elevated temperature; inert gas; hydrogen chloride; scrap metal; recoverable form; removing copper; metal mix; chloride gas; /75/