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Electric arc furnace is an electric furnace that uses the high temperature produced by electrode arc to melt ores and metals. The energy is very concentrated when the gas discharge forms the arc, and the temperature of the arc area is above 3000 ℃. For metal smelting, the electric arc furnace is more flexible than other steelmaking furnaces, which can effectively remove sulfur, phosphorus and other impurities. The furnace temperature is easy to control, and the equipment occupies a small area, which is suitable for smelting high-quality alloy steel.
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At present, the domestic electric arc furnace smelting of high carbon wear-resistant steel castings has developed rapidly, but its application in smelting high-end cast iron refractory castings is less.
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The tapping groove is connected to the furnace shell, and its masonry methods include ramming, pouring, bricklaying or comprehensive masonry.
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Compared with AC furnace, what are the advantages and disadvantages of DC furnace?
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Converter steelmaking is the process of converting molten iron from the blast furnace into oxygen. The furnace body can rotate. The steel plate is used as the shell, and the refractory material is used as the lining. During converter steelmaking, there is no need to heat the molten iron, because the molten iron itself is high temperature, and the oxidation reaction of heating continues inside.
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With the goal of "high efficiency, low consumption, green and intelligent", steel enterprises need to select appropriate electric furnace type and production technology. The raw material of converter process is mainly liquid molten iron, the raw material of electric furnace process is mainly solid scrap, and the final product form is liquid steel. The different transformation of physical and chemical forms determines the different control methods.
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In recent years, the annual output of crude steel in the world has ranged from 1.6 billion tons to 1.8 billion tons, including more than 400 million tons of electric furnace steel, accounting for about 25%. Except for China, the proportion of EAF steel in the global iron and steel industry has reached more than 40%. The proportion of electric furnace steel in the United States has reached 67%, which is the highest proportion of electric furnace steel in developed countries.
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The working principle of electric arc furnace is that the electrode forms an arc between itself and the metal surface to be melted. At the beginning of the operation, the scrap is transported to the scrap workshop at one end of the EAF building. There are many forms of waste, from smashed cars to white appliances, steel and plates used in the kitchen.
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