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:
Jun. 21, 1994
Filed:
Sep. 03, 1992
Werner Hofmann, Feldstrasse, DE;
Franz-Rudolf Block, Kalfstrasse, DE;
Mannesmann Aktiengesellschaft, Dusseldorf, DE;
Abstract
An anode of a direct-current arc furnace is provided in the region of the bottom of the vessel, characterized in that a metallic, broom-like element, having bristles directed towards the interior of the vessel, is positioned in a region of the furnace vessel which is free of refractory material and subsequently, at least in the region of the broom-like element, refractory gunite is applied thereto and a metallic composition is admixed during the guniting, and as the thickness of the applied gunite increases, the ratio of the metallic composition to the refractory composition is reduced, gunite only being sprayed exclusively in the region of the inner edge of the ladle. The practice of the method results in a metallurgical vessel for direct-current arc equipment, which has a cathode protruding into the vessel and at least one anode disposed in the refractory lining of the vessel characterized in that, in the refractory lining at the bottom adjacent to the vessel shell, a metallic, broom-like element connected to the positive pole of the electrical energy equipment. The bristles are embedded in the refractory lining and are directed toward the interior of the vessel and the refractory lining has metallic embedments adjacent the bristles. The proportion by volume of metal embedments to refractory material is less in the part of the furnace lining facing the interior of the vessel than in the lining adjacent the shell. There are no metal embedments at the interior surface of the lining in the wear layer which contacts the melt.