Mar. 06, 2020
The use of graphite is very widespread in our daily lives. Because graphite has excellent properties. Therefore, it is widely used in various fields and can be used as refractories. Graphite products retain the original chemical characteristics of flake graphite and have strong self-lubricating properties. Today Silicon Furnace Graphite Electrode Supplier introduces the relevant information of graphite electrode.
1. Raw material
The graphite electrode is produced using high-quality calcined needle coke.
2. Medium crushing and screening
Needle Coke is crushed in mechanical equipment and sieved and proportioned according to the formula.
The batched raw materials are mixed with a certain proportion of asphalt for heating and kneading to make a plastic paste.
After the kneaded paste is cooled to the process temperature, the press is pressed into shape according to the product specifications.
In the roasting furnace, the "green embryo" electrode is fired to the temperature according to the process requirements. The fired product is specially impregnated with asphalt, impregnated according to a specific process, with the product density and mechanical strength. Improve product performance.
The second-baked product is heated to 3000 ° C. in a graphitized resistance furnace, the carbon atom structure is rearranged to a specific crystal form, and the carbon is converted into graphite.
Graphite electrodes are widely used, mainly used in electric furnace steelmaking, mineral heat electric furnace, resistance furnace, etc. Next, I will introduce the use of graphite electrodes in detail.
1.Graphite electrode used in electric arc steelmaking furnace
Electric Arc Furnace Graphite Electrode is mainly used in electric furnace steelmaking. Electric furnace steelmaking uses graphite electrodes to introduce current into the furnace. A strong current generates an arc discharge through the gas at the lower end of the electrode. The heat generated by the arc is used for smelting. Size, equipped with graphite electrodes of different diameters. In order to use the electrodes continuously, the electrodes are connected by electrode screw joints. The graphite electrodes for steelmaking account for about% of the total amount of graphite electrodes.
Electric Arc Furnace Graphite Electrode
2.Customer's mining electric furnace
Mineral thermal electric furnaces are mainly used to produce ferroalloys, pure silicon, matte, and calcium carbide. Its characteristic is that the lower part of the conductive electrode is buried in the charge, so in addition to the heat generated by the arc between the electric plate and the charge, the current also generates heat from the resistance of the charge when passing through the charge. It takes about 40kg of graphite electrode per ton.
3.For resistance furnace
Graphite furnaces for the production of graphite products, melting furnaces for melting glass, and electric furnaces for the production of silicon carbide are all resistance furnaces. The boredom inside the furnace is both a resistance and a heated object. Generally, the graphite electrode for electric conduction is not continuously consumed in the hearth wall at the end of the hearth.
In addition, a large number of graphite electrode blanks are also used to process various shaped products such as crucibles, graphite boats, hot die casting molds, and vacuum electric furnace bodies. For example, in the quartz glass industry, graphite electrode blanks are used for each 1t of capacitor tubes, and 100kg of electrode blanks are consumed for every 1t of quartz bricks.
In addition, there are some precautions for the use and storage of graphite electrodes:
Shock is strictly prohibited. Graphite products are strictly prohibited. When storing, graphite products must be placed on a boring place or on a wooden stand. Excessive amount of pyrophoric agents and additives will reduce the life of graphite products. During use, graphite products should be transferred once a week. Extend the life of graphite products; prevent strong erosion of the front and bottom of direct injection graphite products; the characteristics of graphite powder are high strength acid resistance, corrosion resistance and high and low temperature resistance, graphite has good chemical stability at room temperature, It is not subject to any strong acid, strong alkali and erosion, so graphite products have very little loss even in use.
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