The graphite electrode is an important high-temperature conductive material for electric steelmaking, and the electric energy is input to the electric furnace through the graphite electrode. How is Graphite Electrode Made? RS Graphite Electrode Supplier will talk about the question.
The preparation process of graphite electrodes has been continuously developed with the improvement of steelmaking requirements. In general, graphite electrode manufacturers use petroleum coke and needle coke as aggregate, and coal asphalt as binder. A high temperature resistant graphite conductive material produced by a series of processes such as kneading, molding, baking, dipping, graphitization, and mechanical processing.
Graphite Electrode Production Process
1.Calcination
The carbonaceous raw material is heat-treated at a high temperature to discharge the moisture and volatile matter contained therein, and the production process for improving the original cooking performance is called calcination. Generally, the carbonaceous raw material is calcined by using gas and its own volatile matter as a heat source, and the maximum temperature is 1250-1350 °C.
Through calcination, the microstructure and physicochemical properties of the carbonaceous raw materials have undergone profound changes. Mainly reflected in the increase of coke density, mechanical strength and electrical conductivity, improve the chemical stability and oxidation resistance of coke, laid the foundation for the subsequent process.
2.Kneading
At a certain temperature, the quantitative carbonaceous pellets and powders of various sizes are stirred and uniformly mixed with the quantitative binder, and the process of kneading the plastic paste is called kneading.
3.Molding
The molding of the carbon material refers to a kneaded carbon paste which is plastically deformed under an external force applied by the molding apparatus. The process of forming a green body (or raw product) having a certain shape, size, density, and strength.
4.The Operation of Extrusion
Discharge the volatiles and reduce to a suitable temperature (90-120 ° C) to increase the adhesion, so that the blockiness of the paste is evenly favorable for molding. After molding, the green body needs to be inspected: bulk density, appearance tapping, profiling, and the like.
5.Baking
Calcination is a process in which a green product of a carbon product is placed under a protection of a filler and charged into a specially designed heating furnace for high-temperature heat treatment to carbonize the coal pitch in the green body. The bitumen coke formed after the coal pitch is carbonized, and the carbonaceous aggregate and the powder particles are consolidated together. The charcoal after calcination has high mechanical strength, low electrical resistivity, good thermal stability and chemical stability.
RS Graphite Electrode Supplier
Because of graphite electrodes have a wide range of applications in electric steelmaking. Although the graphite electrodes production process is complicated, the production cycle is relatively long. However, RS graphite electrode suppliers strictly review each production process and lay a solid foundation for the production of high quality graphite electrodes.
The RS graphite electrode supplier has undergone a rigorous graphite electrode production process. It has a high quality and is a graphite electrode product that can meet the high quality steelmaking needs. Feel free to contact us for more information on graphite electrodes. Want to learn more info about graphite electrode price, please mailto us now. We will get back to you as soon as possible.