Title:
Process of manufacturing carbon electrodes for electric furnaces
United States Patent 1840491


Abstract:
359,990. Furnace electrodes. SIEMENS-PLANIAWERKE AKT.-GES. FœR KOHLEFABRIKATE, 128, Herzbergstrasse, Lichtenberg, Berlin. May 28, 1930, No. 16521. Convention date, Nov. 23, 1929. [Class 39 (iii).] Furnace electrodes are made by pouring powdered or ground coal or semi-coke into a container and heating it therein until it is completely coked. The mixture may be subjected to pressure, while still in the plastic state, by means of a weight placed thereon. Coarser pieces of coal or semi-coke, graphite, pitch, asphalt, bitumen, or resin may be added to the mixture. The container may be agitated to ensure a uniform density. The coal dust may be moistened with a small quantity of tar. The process may be employed in making " self-baking " electrodes. Reference has been directed by the Comptroller to Specifications 12434/00, [Class 39, Electric lamps &c.], 251,982, and 308,750, [both in Class 39 (iii), Heating by electricity].



Inventors:
Otto, Dietsche
Application Number:
US46009930A
Publication Date:
01/12/1932
Filing Date:
06/09/1930
Assignee:
SIEMENS PLANIAWERKE AG
Primary Class:
Other Classes:
252/502, 264/71, 264/105, 373/88
International Classes:
H05B7/085
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