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Blast furnace Process engineering and chemistry A blast furnace is a metallurgical furnace used to smelt and produce industrial metals, usually pig iron but also other metals such as lead or copper. Blast is the provision of combustion air above atmospheric pressure. [1]In a blast furnace, fuel (cok
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Smaller arc furnaces may be adequately cooled by circulation of air over structural elements of the shell and roof, but larger installations require intensive forced cooling to maintain the structure within safe operating limits. The furnace shell and roof may be cooled either by water circulated th
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Producing one ton of steel in an electric arc furnace requires about 400 kWh per short ton (1.44 gigajoules) or about 440 kWh per ton (1.6 GJ); the theoretical minimum energy required to melt one ton of scrap is 300 kWh (1.09 GJ) (melting point 1,520 °C (2,768 °F)). Thus, a 300-ton, 300-MVA EAF woul
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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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Saving production costs is a major advantage of continuous charging EAF. The production cost savings brought by the continuous charging EAF smelting process mainly comes from continuous charging and stable smelting state. These factors determine that less total energy (electrical and chemical) needs to be consumed in the smelting process, and can use energy better and more efficient.
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The Consteel electric furnace smelting process is a new process developed by the Italian Dexing Group in the 1990s.
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Low voltage and small current must be used to slowly heat up the brine furnace (carbon free furnace lining). If the temperature rises rapidly, the brine will vaporize violently and cause furnace bottom cracking and furnace wall cracking. In the process of furnace drying, it is necessary to arrange an interval to cut off power, check the electrode position of furnace drying, furnace lining sintering, equipment and water cooling system
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