Sms Siemag Aktiengesellschaft

Sms Group Gmbh

Dieter Borgwardt

Jürgen Kunze

Rolf Degel

Gabriel Angel Riveros Urzua

Andrzej Warczok

Juergen Kunze

Thomas Pasch

Karl-Heinz Kummer

Roberto Marcelo Parada Araya

Marco Antonio Caceres Rivera

The invention is directed to a process for extracting a metal from a slag containing said metal, wherein the liquefied metal-containing slag is heated in at least one electric arc furnace (). In order provide an improved method for recovering especially copper from slags, the invention provides that the metal-containing slag is heated in a first furnace () constructed as an AC electric furnace or a DC electric furnace, and the melt is introduced from the first furnace () into a second furnace () which is constructed as a DC electric furnace. Further, the invention is directed to an arrangement for extracting a metal from a slag containing said metal.

Process and arrangement for extracting a metal from slag a containing said metal

The invention relates to a melting or reduction furnace (), in which the charge stock () is supplied using feed pipes (). Each feed pipe () has a mouthpiece () that is not cooled and is configured from an uncooled wear-resistant inner guide pipe () and an uncooled concentric, heat-resistant outer protective pipe ().

Smelting or reduction furnace, in particular electric arc furnace with an open, semi-closed or closed configuration

The invention relates to a method for reducing and/or refining a metal-containing slag. The aim of the invention is to improve reduction of the slag. For this purpose, calcium carbide (CaC) is added to the slag as the reducing agent.

Method for reducing and/or refining a metal-containing slag

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Dorsten, Germany

Dieter Borgwardt