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:
Sep. 16, 1986
Filed:
Nov. 10, 1983
Arthur H Griebel, III, Kokomo, IN (US);
Richard A Foster, Russiaville, IN (US);
Cabot Corporation, Boston, MA (US);
Abstract
A process for refining metal in a crucible containing a layer of molten slag, wherein molten metal passes downwardly through the slag and resolidifies as an ingot thereunder. The slag is kept molten by passing electrical current through the slag layer and between a first electrode and a second electrode. The second electrode has liquid or gas cooling means as an integral part thereof. Current is passed between the first electrode and the second electrode through at least one electrically conductive member interposed between the slag and the second electrode. The electrically conductive member has a melting temperature above the melting temperature and below the bulk temperature of the slag. A portion of the surface of the electrically conductive member that is in contact with the slag has a temperature above the freezing temperature of the slag. The first electrode may be a consumable electrode which is partially immersed in the layer of molten slag such that it gradually melts, and drops of metal move downwardly therefrom. The second electrode is usually the crucible but may be a non-consumable electrode which is partially immersed in the layer of molten slag.