Artificial graphite electrode machining pretreatment method

Abstract

The invention belongs to the technical field of graphite electrodes, and particularly relates to an artificial graphite electrode machining pretreatment method which comprises the following steps of 1, calcining raw materials: calcining carbonaceous raw materials under the condition of isolating air to obtain paste, 2, extrusion forming: specifically, enabling the paste to pass through a cylindrical die nozzle under pressure, and enabling the paste to become a cylindrical blank, 3, roasting the blank: roasting the blank under the condition of isolating air, and 4, blank dipping: dipping the roasted blank into engine oil to enable the engine oil to permeate into the blank. In the impregnation process of the artificial graphite electrode blank, the artificial graphite electrode blank is prevented from being damaged; in the process of taking out the artificial graphite electrode blank, an external lifting appliance is not needed, and the operation is convenient; according to the method, the speed that engine oil permeates into gaps in the artificial graphite electrode blank is increased, and the pretreatment efficiency is improved.

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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