Graphite electrode manufacturing process and production equipment
By:Win Nov 06, 2020
Graphite electrode manufacturing process from raw materials to finished products need more than ten processes, Graphite electrode manufacturing requires more equipment to run.
Graphite electrode manufacturing process
Graphite electrode production line process: raw materials - calcining - ingredients, kneading, molding, dipping - roasting - graphitized - machining process.
Graphite electrodes production process:
1. Raw Materials
Graphite electrode is mainly made of petroleum coke, with needle coke and coal pitch added.
Calcination can remove the moisture and volatiles contained in raw materials and improve the physical and chemical properties of raw materials. The equipment used includes tank calciner, rotary kiln and electrocalciner.
3. Extrusion molding
The mixed material is extruded and formed by horizontal hydraulic extruder and screw extruder. Extruded is called green.
Roasting can greatly improve the thermal stability, mechanical strength and electrical conductivity of the material.
Main types of roasting furnace:
Continuous operation: ring furnace (with cover, without cover), tunnel kiln
Batch operations: inverted kiln, car bottom type roaster, box type roaster
After calcination, it is put into a pressure vessel. Under certain pressure and temperature conditions, the liquid impregnating agent asphalt is immersed into the pores of the electrode.
The semi-finished electrode is heated to 2300-3000 ℃ above in the high temperature electric furnace. High temperature heat treatment process of transforming amorphous disordered structure carbon into three-dimensional ordered structure of stone inks. Graphitization is carried out by means of electric heating, using Acheson graphitization furnace and LWG furnace.
7. Mechanical processing
Electrode machining depends on automatic or semi-automatic nc machine cutting to reach the required size, shape, precision, etc., and is made to meet the requirements of the use of the electrode body and joint.
Graphite electrodes production equipment:
Graphite electrode producers and equipment of each graphite electrode manufacturer are different, so it is only for reference.