Method and apparatus for graphitization of carbon materials
AssigneeSigri Elektrographit GmbH
InventorsMartin Michels, Wilhelm Settele
Life of this patent
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Abstract
Continuous-type furnace for the graphitization of carbon bodies having a preheat zone, a cooling zone and a heating zone provided with an electric heating device, through which furnace the carbon bodies are cyclically transported either as a single body or in groups and are deposited between cycles on holding devices which are connected to the furnace. The motion in the direction of the length of the furnace is effected by gripping devices which reach into the furnace periodically. Graphitization of carbon bodies with considerable reduction of the energy requirements are achieved.
Claims12
Method for graphitization of carbon bodies in a continuous-type furnace which comprises transporting a charge of carbon containing at least one carbon body to be graphitized into a preheating zone of said furnace wherein said charge of carbon is retained by a holding device in said preheating zone and passing a hot inert gas in contact with said carbon charge, transporting said preheated carbon to a graphitization zone in said furnace wherein said preheated carbon is retained in said graphitization zone by a holding device in said zone and heating said preheated carbon by electrical heating means up to a temperature above 2200.degree. C in said graphitization zone to effect graphitization of preheated carbon, transporting said graphitized carbon to a cooling zone in said furnace wherein said graphitized carbon is retained in said cooling zone by a holding device in said zone and cooled in said cooling zone to a temperature below about 500.degree. C, said preheating, graphitization and cooling of said carbon body constituting a cycle of operation, simultaneously subjecting in furnace a carbon charge to preheating, another previously preheated carbon body to graphitization, and a third previously preheated and graphitized carbon body to cooling, and after each cycle removing the cooled graphite body from the holding device in the cooling zone and transporting it out of the cooling zone, removing the graphitized body from the holding device in the graphitizing zone and transporting it to the cooling zone, removing the preheated carbon from the holding device in the preheating zone and transporting it to the graphitizing zone, transporting a new charge of carbon into the preheating zone, and continuing the simultaneous preheating, graphitization and cooling of three different carbon charges and between cycles moving the carbon bodies from the holding devices and transporting the graphite carbon out of the cooling zone, transporting the graphitized carbon to the cooling zone, transporting the preheated carbon to the graphitization zone, and transporting a new charge to the preheating zone.
Method of graphitizing carbon bodies in a continuous-type furnace which comprises preheating a cyclical flow of groups of carbon bodies, respectively, consisting of at least one carbon body, counter to a flow of hot inert gas, heating the groups of carbon bodies in a graphetizing zone electrically heated to a temperature above 2200.degree. C, cooling the heated groups of carbon bodies, respectively, in a cooling zone to a temperature below 500.degree. C, and wherein in the graphitization zone each carbon body therein is held by two holding members which are connected electrically with a source of electric current thereby heating said carbon body.
A continuous-type furnace for graphitization of carbon bodies comprising a channel in said furnace through which a carbon body for graphitization may pass consecutively through a preheating zone, a graphitization zone and a cooling zone, holding means in each said zones for retaining carbon bodies in said zones, means for preheating said carbon body in said preheating zone, electrical heating means in said graphitization zone for graphitizing said carbon body, cooling means in said cooling zone for cooling said graphitized body, slot-shaped openings in said furnace, gripping devices extending through said slot-shaped openings into said zones in said furnace channel for gripping said carbon bodies in said zones and extending outside said channel, means connected to said gripping devices outside said channel to move the carbon bodies in said zones in horizontal and vertical directions.
Dependencies are inferred from the claim text.