Audi Ag

Sgl Carbon Se

Tokai Cobex Gmbh

Sgl Carbon Gmbh & Co.

Johann Daimer

Andreas Kienzle

Martin U Christ

Oswin Öttinger

Jens Rosenlöcher

Wilhelm Frohs

Rudi Beck

Otto Mederle

Matthieu Schwartz

Heribert Walter

Alfred Edlinger

Frank Hiltmann

Hubert Jaeger

Rainer Schmitt

Bernt Ketterer

Rudi Back

Franz Kals

Otto Mederie

Franz Kalchschmid

Walter Lhotzky

Franz Liebhart

Ivano Galbiati

Gerhard Putz

Hubert Putz

Stefan Gschwandtner

Coke including additives that are accumulated at the yield points or in the regions surrounded by the yield points. For homogeneous distribution, the additives are continuously dosed into the delayed coker during the filling time. The dosing can be carried out by powdery blowing with an inert gas (nitrogen) or also distributed in a slurry consisting of the reaction components and a partial flow of the coker feed (vacuum resid, pytar, decant oil or coal-tar distillates). According to an advantageous form of embodiment, the additives may optionally have a diameter of between 0.05 mm and 5 mm, preferably between 1 mm and 3 mm. Advantageously, the additives can be selected from at least one of acetylene coke, fluid coke, flexi coke, shot coke, carbon black, non-graphitisable carbons (chars), non-graphitic anthracite, silicon carbide, titanium carbide, titanium diboride or mixtures thereof.

Coke with additives

The invention relates to a method for producing graphite materials as well as the use thereof in lithium ion batteries.

Catalytically active additives for coke originating from petrol or coal

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, feeding liquid silicon to the porous carbon workpieces at an operating pressure pand an operating temperature T, and impregnating the porous carbon workpieces with liquid silicon, reaction of the liquid silicon in the workpiece at a temperature Twith the formation of silicon carbide that consists of carbon and silicon, gassing the workpiece with inert gas and cooling from the operating temperature Tto the conditioning temperature T, cooling the workpieces to room temperature, the temperature Tbeing greater than or equal to the temperature T, and the workpiece in step d of the method no longer being in contact with liquid silicon outside of the workpiece.

Method for siliconizing carbon-containing materials

In a method for processing used cathode material containing carbon, in particular used cathode troughs from aluminum production, the cathode material is put into a shaft furnace and, in order to gasify carbon, is subjected to a thermal treatment in the shaft furnace at a temperature above the ignition temperature of the carbon and above the evaporation temperature of toxic substances contained in the used cathode material. The reaction gases are conducted co-current with the carbon in a first longitudinal section of the shaft furnace and countercurrent to the carbon in a second longitudinal section of the shaft furnace. The reaction gases are drawn from a region of the shaft furnace having an enlarged cross-section between the longitudinal sections and are preferably subjected to an after-treatment.

Method for processing used carbon-containing cathode material

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, delivery of liquid silicon to the porous carbon workpieces at an operating pressure pand an operating temperature Tand impregnation of the porous carbon workpieces with liquid silicon, reaction of the liquid silicon in the workpiece at a temperature Twith formation of silicon carbide from carbon and silicon, gassing of the workpieces with inert gas, and cooling from the operating temperature Tto a conditioning temperature T, cooling of workpieces to room temperature, in step c the delivery of silicon and transport of the workpieces taking place over preferably cylindrical rolls which are porous at least in the exterior region and which are pivoted, and their speed of rotation determining the residence time for the delivery of silicon in step c, and the temperature Tbeing greater than or equal to the temperature T, and the workpieces for process step d no longer being in contact with liquid silicon outside the workpieces.

Method and device for siliconization of carbon-containing materials

Process for producing bodies from ceramic materials using silicon carbide, comprising the steps: configuration of fiber-reinforced porous bodies () that consist of carbon on a base () that is inert relative to liquid silicon, the bodies having cavities () that are accessible from the exterior or surface recesses ('), and the cavities () being closed at the bottom in the porous bodies or the surface recesses (&#x2032;) together with the base () forming a reservoir that is sealed at the bottom; heating the configuration by introduction of energy to melt the silicon () that is present in the reservoir; and infiltrating the melted silicon in the bodies () and reaction of the silicon with the carbon to form silicon carbide; and use of the thus produced bodies as brake disks and as clutch driving disks.

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 () that consist of carbon on a base () that is inert relative to liquid silicon, the bodies having cavities () that are accessible from the exterior or surface recesses (), and the cavities () being closed at the bottom in the porous bodies or the surface recesses () together with the base () forming a reservoir that is sealed at the bottom; heating the configuration by introduction of energy to melt the silicon () that is present in the reservoir; and infiltrating the melted silicon in the bodies () and reaction of the silicon with the carbon to form silicon carbide; and use of the thus produced bodies as brake disks and as clutch driving disks.

A graphite electrode for an electrothermic reduction furnace is formed from anode grade coke and graphitized at a graphitization temperature below 2700&#xb0; 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 &#x3bc;Ohm&#xb7;m, and a thermal conductivity of less than 150 W/m&#xb7;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&#xb0; C. for a time sufficient to cause the carbon atoms in the carbonized electrode to organize into the crystalline structure of graphite.

Graphite electrode for electrothermic reduction furnaces, electrode column, and method of producing graphite electrodes

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 T1, feeding liquid silicon to the porous carbon workpieces at an operating pressure p2 and an operating temperature T2, and impregnating the porous carbon workpieces with liquid silicon, reaction of the liquid silicon in the workpiece at a temperature T3 with the formation of silicon carbide that consists of carbon and silicon, gassing the workpiece with inert gas and cooling from the operating temperature T3 to the conditioning temperature T, cooling the workpieces to room temperature, the temperature T3 being greater than or equal to the temperature T2, and the workpiece in step d of the method no longer being in contact with liquid silicon outside of the workpiece.

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 &#x3bc;m 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. By using a complete range (continuum) of particle sizes in conjunction with an intensive mixer, the geometric packing of the particles is significantly improved, hence the material density is increased and thus a higher mechanical strength as well as improved electrical conductivity in comparison to conventional graphite electrodes is achieved.

Method for using fracture resistant electrodes in a carbothermic reduction furnace

A method rebakes and graphitizes pitch-impregnated carbon bodies in an encapsulated Castner-type lengthwise graphitization furnace in one step. A furnace shell is constructed of element modules and can carry out the method. A furnace utilizes the furnace shell. The oxygen content in the interior of the furnace is kept below 4% by volume. The method is carried out under atmospheric pressure or at pressures that differ only slightly from the atmospheric pressure.

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Mörfelden-Walldorf, Germany

Johann Daimer