Production method of high-purity silicon iron for production of silicon steel
A production method and ferrosilicon technology, applied in furnace types, furnaces, electric furnaces, etc., can solve the problems of high metallurgical coke ash, small surface area, long reduction reaction time, etc., and achieve the effect of reducing pollution and power consumption.
Inactive Publication Date: 2019-12-27
天津炜润达新材料科技有限公司
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Problems solved by technology
Its disadvantages are high metallurgical coke ash content, large coke particle size, small surface area and long reduction reaction time
Method used
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Embodiment 1
[0039] A production method for producing high-purity ferrosilicon for silicon steel, characterized in that the production steps are as follows:
[0040] A granulation drying
[0041] Mix and stir the silica mud and the binder, press the ball after mixing to produce silica mud particles, and then dry the silica mud particles. The mass percentage of the chemical composition of the silica mud is required to be SiO 2 >90.0%, Al 2 o 3 <0.03%, CaO<0.01%, the sum of other impurities except iron oxide is less than 0.02%;
[0042] B high temperature melting
[0043] After granulation and drying, the silicon mud particles and reduced iron powder are mixed. The weight ratio of silicon mud particles and reduced iron powder is 100:25. After the inert gas is used for protection, start to gradually add the mixed silicon mud particles and reduced iron powder into the furnace. Appropriately add slagging agent according to the situation, continuous smelting, intermittent furnace, sampling ...
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The invention provides a production method of high-purity silicon iron for production of silicon steel. Silicon mud and a binding agent are mixed, stirred, granulated and dried, and then are subjectedto high-temperature melting in a medium-frequency induction furnace, then ingot casting is conducted in a silicon iron tank, and cooling and crushing are conducted to prepare a high-purity silicon iron product. The silicon mud generated by the photovoltaic industry is utilized, proper raw materials and technological conditions are selected, and the high-purity silicon iron is produced for smelting the silicon steel. After the production method is implemented, pollution of the silicon mud to the environment is reduced, and by using the production method to produce the silicon iron, under the situation of normal electric power, electricity consumption is 2800-3500 kilowatt-hour per ton of silicon iron, that is, electricity consumption for producing the high-purity silicon iron through the production method is lowered by one half or above.
Description
technical field [0001] The invention relates to the technical field of alloy production, in particular to a production method for producing high-purity ferrosilicon for silicon steel. Background technique [0002] At present, ferrosilicon is smelted at home and abroad by using silica + metallurgical coke (petroleum coke + charcoal + coal, etc.) + steel shavings (or iron ore) to reduce in submerged arc furnaces, and some still use multi-component slag suction to remove parts outside the furnace. Impurities, complex process, high energy consumption. The traditional batching method is silica: coke: steel scrap = 100: (48-56): 26, silica containing SiO2 > 97% can be used, coke particle size is 5-18mm. Its disadvantages are high metallurgical coke ash content, large coke particle size, small surface area and long reduction reaction time. Contents of the invention [0003] The invention aims to solve the deficiencies in the prior art, and provides a production method for pr...
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Patent Timeline
Login to View More IPC IPC(8): C22C38/04C22C38/06C22C38/46C22C38/50C22C38/54C22C33/04C21C5/52
CPCC21C5/5264C22C33/04C22C38/002C22C38/004C22C38/04C22C38/06C22C38/46C22C38/50C22C38/54
Inventor 朱万政王三忠田博高波郝书棣于海阔高子旗朱文龙
Owner 天津炜润达新材料科技有限公司