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The electric arc furnace automation control system mainly includes three aspects: the electric arc furnace body system, the Consteel horizontal feeding system, and the furnace door furnace wall oxygen lance system.
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Electric furnace steelmaking mainly uses arc heat. In the arc action area, the temperature is as high as 4000 ℃. The smelting process is generally divided into melting period, oxidation period and reduction period. In the furnace, not only oxidation atmosphere but also reduction atmosphere can be caused. Therefore, the efficiency of dephosphorization and desulfurization is very high.
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Electric furnace equipment is usually a complete set, including electric furnace body, power equipment (electric furnace transformer, rectifier, frequency converter, etc.), switches, auxiliary auxiliary appliances (resistors, compensation capacitors, etc.), vacuum equipment, detection and control instruments (electrician Instrumentation, thermal instrumentation, etc.)
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EBT electric furnace can retain 10% ~ 15% steel and more than 95% slag through eccentric bottom tapping. EBT electric furnace realizes slag free tapping by leaving 10% ~ 15% steel, maintaining sufficient molten steel in the tapping box and rapid back tilting (3 °/s) of the furnace body during tapping and tilting.
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Rapid melting and heating are the most important functions of electric arc furnace, which begins after the first basket of scrap is added to the furnace. In order to melt the scrap steel and make the molten steel temperature reach the tapping temperature in the shortest possible time, the following operations are generally carried out in the EBT electric furnace: power supply at the maximum possible power, oxygen one burner nozzle melting, oxygen blowing and stirring, bottom blowing mixing, foam slag and other intensified smelting and heating technologies.
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An electric arc furnace is an electric furnace that smelts metals and ore at high temperatures generated by electrode arcs. When the gas discharge forms an arc, the energy is very concentrated, and the temperature of the arc zone is above 3000 ℃. For smelting metals, electric arc furnaces are more f
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The poor kinetic conditions of the metallurgical reaction in the molten pool have always been a technical problem in electric arc furnace steelmaking. The lack of agitation strength of the electric arc furnace steelmaking bath has a lot to do with the characteristics of the furnace type. The traditional electric arc furnace uses scrap steel as the basic raw material, mainly uses electricity, and is supplemented by chemical energy to produce qualified molten steel.
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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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