The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 07, 1982
Filed:
May. 23, 1980
Horst Weigel, Cologne, DE;
Gerhard Melcher, Cologne, DE;
Klockner-Humboldt-Deutz AG, , DE;
Abstract
Method and apparatus for smelting an ore concentrate or the like in which the concentrate is first melted in an oxidizing atmosphere and the smelt is thereafter treated with reducing gases to recover the metal values. One of the features of the present invention resides in conducting the after-treatment by means of blowing reducing gases into the smelt with a plurality of separate lances to provide a lighter slag phase and a heavier metal-containing phase, and separately withdrawing the slag phase and the metal containing phase from the furnace. In a particularly preferred embodiment of the invention, the smelt is aftertreated in the sequence involving first blowing an oxidizing gas thereon, then blowing a neutral gas thereon, and finally blowing a reducing gas thereon prior to separating the slag phase from the metal phase.