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With the increasing requirements for the quality of special steel in the domestic manufacturing industry, improving EAF steelmaking process and equipment level has become the key to improving the quality of EAF steel products.
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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 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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The new furnace body usually needs to be dried to make the furnace body sinter and remove moisture. The alkaline electric arc furnace image is composed of magnesia, dolomite, asphalt, tar and other materials. After the volatiles in the asphalt and tar are removed at high temperature, the remaining solid carbon becomes the skeleton of the furnace lining refractory.
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Focusing on the objectives of high production efficiency, simple function, environmental friendliness, intelligent control and diversified raw materials, electric furnace steelmaking technology has been continuously developed. The goal of high efficiency of electric furnace smelting is to shorten the smelting cycle and power on time as much as possible and reduce the smelting power consumption as much as possible.
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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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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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