| Patent Number |
Title Of Patent |
Date Issued |
| 4783790 |
Direct-current arc furnace for steelmaking |
November 8, 1988 |
| A DC arc furnace for steelmaking in which horizontal steel anodes without internal water cooling are used. The front portion of the anodes enters through holes in the walls into the furnace space and the lower level of the anodes reaches the furnace space in a level which is lower than t |
| 4750187 |
Graphitic electrode with protective coating |
June 7, 1988 |
| The protective coating consists of three layers. As alloying additives in the first and second layer or only in the second layer are used, nickel and iron or their oxides whereby the nickel content is from 0.05 to 0.95% and the iron content is, respectively, from 0.1 to 15% with regard t |
| 4740990 |
Graphite electrode with protective coating and method for its production |
April 26, 1988 |
| A graphite electrode with protective coating, consisting of a single- or multilayer metallic or metal-oxide coating, and a graphite layer containing graphite, vinyl-acetate as binder and methyl cellulose as thickener, this surface layer being compacted by means of a pressure roller o |
| 4703493 |
Seal for an electrode hole in an electric arc furnace |
October 27, 1987 |
| A sealing device which comprises a refractory portion consisting of high-alumina material with an Al.sub.2 O.sub.3 content higher than 80%. The internal portion of the sealing device is made up of refractory cement with an Al.sub.2 O.sub.3 content higher than 80% which is cast and vi |
