A kind of artificial graphite electrode machining pretreatment method

Abstract

The invention belongs to the technical field of graphite electrodes, and in particular relates to a method for machining pretreatment of artificial graphite electrodes, comprising the following steps: Step 1, raw material calcining: calcining carbonaceous raw materials under the condition of isolating air to obtain a paste; step 2. Extrusion molding: Make the paste pass through the cylindrical die under pressure, and the paste becomes a cylindrical blank; Step 3, Roasting the blank: Roast the blank under the condition of isolating the air; Step 4, Blank impregnation: immerse the roasted blank in engine oil, so that the engine oil penetrates into the inside of the blank. In the process of impregnating the artificial graphite electrode blank, the invention avoids damage to the artificial graphite electrode blank; in the process of taking out the artificial graphite electrode blank, there is no need to use an external hanger, and the operation is convenient; the invention accelerates the penetration of machine oil into the artificial graphite electrode The speed of the void inside the billet improves the efficiency of pretreatment.

Description

technical field [0001] The invention belongs to the technical field of graphite electrodes, and in particular relates to a machining pretreatment method for artificial graphite electrodes. Background technique [0002] Artificial graphite electrodes refer to petroleum coke and pitch coke as aggregates, coal tar pitch as binder, and are made by calcination of raw materials, crushing and grinding, batching, kneading, molding, roasting, impregnation, graphitization and mechanical processing. High temperature resistant graphite conductive material. The processing of artificial graphite electrodes mainly has three forms: pressurized vibration method, numerical control automatic forming method and mechanical processing method. Among them, the machining method is the main method used in the production of artificial graphite electrodes, usually by turning, milling and grinding methods; calcining, molding and roasting are required before machining. Because graphite materials are pr...

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Problems solved by technology

[0004] The invention provides a method for machining pretreatment of artificial graphite electrodes, the purpose of which is to solve the following problems currently existing in the process of machining pretreatment of artificial graphite electrodes: (1) During the impregnation process of artificial graphite electrode blanks, artificial When the graphite electrode blank is sent into the impregnation tank, it cannot buffer the artificial graphite electrode blank, which will easily cause the artificial graphite electrode blank to collide with the impregnation tank, and damage the artificial graphite electrode blank; In the process of taking out the artificial graphite electrode blank, it is necessary to use an external sling, which is inconvenient to operate; (2) Since the pore size inside the artificial graphite electrode blank is very small, it takes a lot of money to penetrate into the gap inside the artificial graphite electrode blank through the self-flow of the machine oil. Longer time, less efficient pretreatment

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