PROCESS AND DEVICE FOR THE EXTRACTION OF VALUABLE SUBSTANCES

摘要

A process and melting furnace unit are provided for extracting valuable substances by reducing oxygen-bound metals which process includes exposing a charge in a first reaction zone of a furance vessel to heat energy so that a liquid slag floats on a metal melting bath, feeding the metal bath to a second reaction zone of the furnace vessel where the slag comes intemately into contact with a reducing agent, and feeding additional heat energy to the melt in the second reaction zone to prevent hardening.