Abstract: 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 (1, 2). 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 (1) constructed as an AC electric furnace or a DC electric furnace, and the melt is introduced from the first furnace (1) into a second furnace (2) 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.
Type:
Grant
Filed:
June 8, 2006
Date of Patent:
August 15, 2017
Assignee:
SMS GROUP GMBH
Inventors:
Jürgen Kunze, Rolf Degel, Dieter Borgwardt, Andrzej Warczok, Gabriel Angel Riveros Urzua
Abstract: A process for treating a metal sulphide concentrate which includes the steps of: a) roasting the concentrate to reduce the sulphide content of the concentrate, to a negligible value and b) melting the concentrate, under reducing conditions, in an electrically stabilized open-arc furnace, in particular a DC arc furnace.
Type:
Grant
Filed:
November 29, 2001
Date of Patent:
March 2, 2004
Assignee:
Mintek
Inventors:
Rodney T Jones, Nicholas A. Barcza, Gary Kaiura, Gary O'Connell, Anthony Hannaford