Process and arrangement for extracting a metal from slag...

Details Process and arrangement for extracting a metal from slag... Process and arrangement for extracting a metal from slag...

F - Mech Eng,Light,Heat,Weapons

27

B

F27B 3/04 (2006.01) C22B 15/00 (2006.01)

Patent

CA 2598571

The invention concerns a method for extracting a metal from a slag containing the metal, in which the liquefied metal-containing slag is heated in at least one arc furnace (1, 2). In order to develop an improved method for extracting, in particular, copper from slag, the invention provides for the metal- containing slag to be heated in a first furnace (1) in the form of an AC or DC electric furnace and for the melt from the first furnace (1) to be transferred to a second furnace (2) in the form of a DC electric furnace. The invention also concerns a device for extracting a metal from a slag containing the metal.

L'invention concerne un procédé pour extraire un métal d'un laitier contenant ce métal, selon lequel ledit laitier liquéfié à teneur en métal est chauffé dans au moins un four à arc (1, 2). L'invention vise à réaliser un procédé amélioré pour récupérer notamment du cuivre à partir de laitiers. A cet effet, le laitier à teneur en métal est chauffé dans un premier four (1), qui est un four électrique à courant alternatif ou continu, puis le laitier est transféré de ce premier four (1) dans un deuxième four électrique à courant continu (2). La présente invention porte également sur un dispositif pour extraire un métal d'un laitier contenant ce métal.

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