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The electric arc furnace is mainly composed of electrode holder, electrode, furnace cover, molten bath, furnace door, tilting cradle, hydraulic steel and other components. The furnace bottom and furnace wall are constructed of acidic or alkaline refractory materials. First, the electric energy is transmitted to the furnace through the electrode, and then the electrode and furnace charge are used to generate electric arc to raise the temperature in the furnace. Finally, the high temperature makes the ore metal melt.
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In recent years, electric arc furnace steelmaking has made great progress in the field of intelligent smelting, and a series of advanced detection technologies and control models have been developed.
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At present, the domestic electric furnace equipment accounts for 85% of the domestic electric furnace capacity, and the imported electric furnace accounts for 15%. Although domestic manufacturers have certain strength in single equipment, and electric furnace equipment below 100 tons has basically been localized, Chinese scientific and technological workers have also been committed to developing complete sets of electric furnace equipment with independent intellectual property rights.
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Electric arc furnace melting uses the heat generated by the electric arc between graphite electrode and iron (molten iron) to melt iron and overheat molten iron. In the process of electric arc furnace smelting, when the iron is melted, the smelting operation of further increasing the temperature and adjusting the chemical composition is carried out under the condition that the molten iron is covered by the slag.
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The oxidation period of ordinary power electric arc furnace steelmaking usually refers to the process stage from the dissolution of the charge, sampling and analysis to the completion of the oxidation slag. Some think it started from blowing oxygen or adding ore to decarbonize.
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The proportion of scrap steel making steel is increasing, and the future development space is broad. my country is a big country of iron and steel production. The proportion of long-process steel making is as high as 90%. There is a huge demand for iron ore (745, 16.00, 2.19%). At the same time, the dependence on iron ore has also remained above 80%. The countries that import iron ore in my country are relatively concentrated, and most of the importing countries are in Australia, Brazil and South Africa. Among them, Australia's imports accounted for more than 60%. The total amount of Australian ore imported by China accounts for more than 70% of the country’s ore output. A large amount of dependence on imports has made our country very passive in international ore pricing. International iron ore prices have also risen all the way, which has also put pressure on domestic steelmaking costs.
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The electric arc furnace is a device that uses the arc generated between the electrode tip and the charge as heat energy to make steel.The development of electric arc furnace technology is the development of direct current electric arc furnace, furnace bottom gas agitation and furnace bottom tapping
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Electric arc furnaces use electric energy as their main energy source. Electric energy draws arcs through the discharge of graphite electrodes and the charge to generate a high temperature of 2000 ~ 6000 ℃ or more. The scrap steel raw materials are melted by arc radiation, temperature convection and
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