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Cooling tower is a comprehensive product integrating aerodynamics, thermodynamics, fluidics, chemistry, biochemistry, materials science, static and dynamic structural mechanics, processing technology and other disciplines.1. The closed cooling tower is a modification and development of the traditio
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The induction the vacuum degassing furnace can realize the following conventional processes:Melting solid materials in the atmosphere (vacuum melting can be an option). Melting solid materials in a controlled atmosphere. Make the alloy distribution uniform and adjust the chemical composition the va
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The electrode lifting hydraulic proportional valve speed automatic regulator adopts a control system composed of a Siemens programmable controller, which is simple and reliable to operate.Electrode lifting mechanism adopts oil cylinder transmission, which is flexible, safe and reliable.The tilting of the furnace body adopts the form of hydraulic transmission, and the integrated block hydraulic valve. The hydraulic station is equipped with two plunger pumps, one for use and one for backup, and is equipped with an energy storage tank, which has the function of maintaining pressure. Six large cross-section water-cooled cables, conductive cross arms, flexible compensators, copper bars, and energy-saving short nets arranged in a triangular space. The impedance value of the short network is ≤0.5+ j 2.3mΩ, and the unbalance of the three-phase impedance is ≤5%.
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In the modern steel production process, the main functions of secondary refining are: (1) Undertake part of the original refining function of the primary furnace, complete part of the steelmaking reaction under the best thermodynamic and kinetic conditions, and improve the production capacity of the
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Development of secondary refining technologyThe secondary refining has the functions of making the temperature and composition of the molten steel uniform, adjusting the composition of the molten steel, degassing (decarburization, denitrification, dehydrogenation), deoxidation, desulfurization, deph
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Refining to remove oxidesAt the end of the secondary refining, in order to obtain high purity molten steel, so-called "bubble floating purification" is required. Here, "bubble floating and purification" means the boiling of molten steel caused by small bubbles near the bottom of the ladle top slag r
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Denaturation of secondary refining inclusionsThe inclusions are denatured by adding calcium-containing materials, such as CaSi. CaSi can be blown into the furnace with a spray gun, or added to the furnace in the form of a core wire. The denaturation of inclusions can be studied with the CaO-Al2O3-Ca
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Dephosphorization of molten steelAt present, the single-use converter process can reach a phosphorus content of 40-100 ppm, which depends on the silicon and phosphorus content in the molten iron. According to the amount of slag to determine the silicon content of molten iron, P2O5 must be formed dur
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