Patent application number | Description | Published |
20080213155 | Method for siliconizing carbon-containing Materials - A method for treating workpieces that consist of porous carbon material with liquid silicon with the formation of silicon carbide, comprising the steps: Preheating porous carbon workpieces under inert gas to the selected operating temperature T | 09-04-2008 |
20080237058 | Method for Producing Aluminum and Method for Producing a Gas-Tight Electrode for Carbothermic Reduction Furnace - A method for producing aluminum and a method for producing a graphite electrode for a carbothermic reduction furnace, in which aluminum is produced by carbothermic reduction of alumina, render the graphite electrode substantially gas-impermeable. The graphite electrode is consumed during furnace operation and electrode columns connected by graphite pins are fed continuously fed in from the top into the furnace. The coating of the electrode withstands a temperature of up to 300° C. and more over a period of several hours without oxidation. Since the coating enters the furnace compartment at least partially, it is configured so that it will not contaminate the hot melt. That is, the chemistry of the coating materials is similar to the ingredients of the overall reaction or, at a minimum, the amount of foreign elements is very low. The coating is provided so that it does not increase the electrical contact resistance at the connection between the electrode columns and the electrode holding clamps. Where the electrode inlet area is cooled by water, the coating is insoluble in water. | 10-02-2008 |
20080317085 | Lining for Carbothermic Reduction Furnace - An inner lining for the steel shell of a carbothermic reduction furnace for the production of alumina has a base layer of graphite and a coating layer of refractory material. The refractory material is corundum (Al | 12-25-2008 |
20090000425 | Graphite Electrode for Electrothermic Reduction Furnaces, Electrode Column, and Method of Producing Graphite Electrodes - A graphite electrode for an electrothermic reduction furnace is formed from anode grade coke and graphitized at a graphitization temperature below 2700° C. The resulting electrode is particularly suited for carbothermal reduction of alumina. It has an iron content of about 0.05% by weight, a specific electrical resistivity of above 5 μOhm·m, and a thermal conductivity of less than 150 W/m·K. The graphite electrode is manufactured by first mixing calcined anode coke with a coal-tar pitch binder, and a green electrode is formed from the mixture at a temperature close to the softening point of the pitch binder. The green electrode is then baked to carbonize the pitch binder to solid coke. The resultant carbonized electrode, after further optional processing is then graphitized at a temperature below 2700° C. for a time sufficient to cause the carbon atoms in the carbonized electrode to organize into the crystalline structure of graphite. | 01-01-2009 |
20090007723 | METHOD FOR USING FRACTURE RESISTANT ELECTRODES IN A CARBOTHERMIC REDUCTION FURNACE - Graphite electrodes for the production of aluminum by carbothermic reduction of alumina are either submerged in the molten bath in the low temperature compartment or they are horizontally arranged in the side walls of the high temperature compartment. The electrodes are manufactured by using a mixture of coke particles covering the complete particle size range between 25 μm to 3 mm and by using an intensive mixer to effectively wet all coke particles with pitch. The electrodes have a flexural strength of at least 20 N/mm | 01-08-2009 |
20090149308 | Method and Device For Siliconization of Carbon-Containing Materials - Method for treatment of workpieces of porous carbon material with liquid silicon with the formation of silicon carbide, comprising the following steps: preheating of porous carbon workpieces under an inert gas to a selected operating temperature T | 06-11-2009 |
20100043699 | Method for Siliconizing Carbon-Containing Materials - A method for treating workpieces that consist of porous carbon material with liquid silicon with the formation of silicon carbide, comprising the steps: Preheating porous carbon workpieces under inert gas to the selected operating temperature T | 02-25-2010 |
20110002834 | Apparatus for Producing Silicone Carbide Articles and Articles Made Therewith - Method for treatment of workpieces of porous carbon material with liquid silicon with the formation of silicon carbide, comprising the following steps: Preheating of porous carbon workpieces under an inert gas to a selected operating temperature T | 01-06-2011 |
20110003138 | PROCESS FOR PRODUCING CERAMIC MATERIALS USING SILICON CARBIDE - Process for producing bodies from ceramic materials using silicon carbide, comprising the steps: configuration of fiber-reinforced porous bodies ( | 01-06-2011 |
20120247005 | METHOD AND REACTOR FOR PROCESSING BULK MATERIAL CONTAINING Li - The invention relates to a method for recovering lithium from a starting material comprising lithium. According to the invention, the starting material is heated with carbon in a reactor by carrying out direct inductive heating of the carbon. | 10-04-2012 |
20120251434 | METHOD AND REACTOR FOR TREATING BULK MATERIAL CONTAINING CARBON - The invention relates to a method for treating bulk material which contains carbon and impurities. According to the invention, bulk material is directly heated inductively inside a reactor. | 10-04-2012 |