graphite electrode scrap paste
The consumption mechanism of graphite electrode scrap paste in steelmaking
The consumption of graphite electrode scrap paste in electric furnace steelmaking is mainly related to the quality of the electrode itself, electric furnace conditions and steelmaking operations.
Modern steelmaking methods mainly include converter steelmaking, open hearth steelmaking and electrical steelmaking. The open-hearth steelmaking method has been basically cancelled. The most fundamental difference between the electric furnace steelmaking method and the converter steelmaking method is that the electric furnace steelmaking method uses electric energy as the heat source, while the electric arc furnace steelmaking method is the most widely used electric furnace steelmaking method. What we usually call electric furnace steelmaking mainly refers to electric arc furnace steelmaking, because other types of electric furnaces, such as induction furnaces, electroslag furnaces, etc., consume less steel.
Electric arc furnace (electric furnace) steelmaking is a steelmaking method that releases an electric arc between the electrode and the charge, and then heats and melts the metal and slag through the direct action of radiation and electric arc, thereby converting electric energy into heat in the electric arc light. Various steels and alloys. The consumption of graphite electrode scrap paste in electrical steelmaking is mainly related to the quality of the electrode itself and the condition of the furnace (such as new and old furnaces, whether there are mechanical failures, whether continuous production, etc.). ) And steelmaking operations (such as steel smelting, oxygen blowing time, charging conditions, etc.).
The consumption of graphite electrode scrap paste itself is only discussed here, and its consumption mechanism has the following aspects:
1. The final consumption includes the sublimation of the graphite material caused by the high temperature of the arc, and the loss of the chemical reaction between the electrode end part and the molten steel and slag. The final high-temperature sublimation rate mainly depends on the current density through the electrode, and is related to the oxidized diameter of the side of the electrode.
2. The chemical composition of the side oxidation electrode is carbon, which will react with air, water vapor and carbon dioxide under certain conditions. The amount of oxidation on the electrode side is related to the unit oxidation rate and the exposed area. Generally, oxidation on the electrode side should account for about 50% of the total consumption of the electrode. In recent years, in order to increase the smelting speed of the electric furnace, the frequency of oxygen blowing operations has been increased, which has led to an increase in electrode oxidation loss. During the steelmaking process, redness of the electrode harness and taper at the lower end are often observed.
3. Joint loss When the electrode is continuously used for the connection of the upper and lower electrodes, a small part of the electrode or the joint (that is, the remaining object) will be broken due to the oxidation and thinning of the electrode or the penetration of cracks. The magnitude of the residual loss is related to the bending of the joint shape, the internal structure of the electrode, and the vibration and impact of the electrode column.
4. Surface peeling During the smelting process, the electrode itself has poor thermal shock resistance. 5. Electrode fractures include electrode torso fracture and joint fracture. Electrode fracture is related to the quality and processing of graphite electrode scrap paste, joints, and steelmaking operations.
[CGM Carbon] CGM Carbon is a leading graphite electrode scrap paste enterprise in China. It mainly produces and sells carbon metallurgical materials. According to industrial standards and customer requirements, it provides fast quotations, reliable quality and competitive price products. Group companies that deliver services as quickly as possible. Founded in 1992 in Zhengzhou in the east-central part of China. In order to play a greater role in the entire production and supply chain, we work closely with our customers. With more than 20 years of professional experience and expertise in the carbon metallurgy industry, the company is committed to research and development, and provides a series of high-quality, innovative, and cost-effective carbon and metallurgical products and solutions. At present, the main products are graphite electrode scrap paste, electrode paste, forged petroleum coke and refractory materials. The product line includes carbon materials, graphite materials, refractory materials and water treatment materials. With an annual output of 200,000 tons of electrode paste, 50,000 tons of graphite electrode scrap paste, 250,000 tons of calcined coke, 20,000 tons of refractory materials, etc.
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