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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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Efficient crushing and sorting of scrap steel is the premise and key to ensure the quality of EAF steelmaking raw materials, and it is very important for EAF steelmaking to achieve clean smelting. The scrap steel after crushing and sorting can greatly improve the cleanliness of raw materials, and provide clean and reliable raw material guarantee for electric arc furnace steelmaking.
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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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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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An electric furnace that uses the induction electric heating effect of the material to heat or melt the material. The basic component of the induction furnace is an induction coil wound with a copper tube. An alternating voltage is applied to both ends of the induction coil to generate an alternating electromagnetic field.
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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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The sliding nozzle tap can be used in electric furnaces and converters. Its structure is similar to that of the ladle sliding nozzle, but it is relatively large and the operation is basically the same. The sliding nozzle device developed by the British Sheffield company was successfully applied to the tapping nozzle in a 90t electric furnace for the first time.
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