Silicon-based desulfurization slag-adjusting agent for vanadium and titanium containing molten iron and preparation method and desulfurization slag-adjusting method thereof
A technology of slagging agent and molten iron, which is applied in the field of silicon-based desulfurization slag adjusting agent for vanadium-titanium molten iron and its preparation, can solve the problems that it is difficult to apply vanadium-titanium molten iron, and achieve reduction of slagging iron loss and reduction of sulfur return Effect
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[0013] According to one aspect of the present invention, the preparation method of silicon-based desulfurization and slagging agent for vanadium-titanium-containing molten iron comprises the following steps: 60-80 parts by weight of quartz sand, 2-8 parts of fluorite, and 5-10 parts of soda ash and 10-20 parts of alumina (for example, aluminum ash) are ground into powder, and mixed evenly to obtain a silicon-based desulfurization and slagging agent for vanadium-titanium molten iron. That is to say, the silicon-based desulfurization and slagging agent for vanadium-titanium molten iron can be composed of 60-80 parts by weight of quartz sand powder, 2-8 parts of fluorite powder, 5-10 parts of soda ash powder and 10-20 parts of oxidized Aluminum powder is evenly mixed. The preferred ratio can be 65-75 parts of quartz sand powder, 4-6 parts of fluorite powder, 6-9 parts of soda ash powder and 12-17 parts of alumina powder. In addition, the particle size of quartz sand powder, fluo...
example 1
[0024] Grind 68 parts of quartz sand, 6 parts of fluorite, 8 parts of soda ash and 18 parts of aluminum ash by weight into fine powder, mix well, and control the particle size to ≤3mm. The obtained silicon-based desulfurization and slagging agent composition is: S0.09%, P0.09%, SiO 2 66.91%, CaF 2 5.6%, Na 2 CO 3 7.24%, CaO2.8%, Al 2 o 3 17.27%.
[0025] Smelting vanadium-titanium-iron concentrate in a blast furnace yields vanadium-titanium-containing molten iron, in which the S content is 0.092% and the temperature is 1305°C. After the molten iron enters the desulfurization station, it first sprays passivated magnesium powder for desulfurization, and the treatment time is 25 minutes. After the desulfurization is completed, 2.8kg / tFe of the above-mentioned silicon-based desulfurization slagging agent is added to the vanadium-containing iron water for slag adjustment. After stirring with a slag rake for 20 seconds, the slag removal operation is carried out, and the amoun...
example 2
[0028] Grind 75 parts of quartz sand, 5 parts of fluorite, 5 parts of soda ash and 15 parts of aluminum ash into fine powder, mix well, and control the particle size to ≤3mm. The obtained silicon-based desulfurization and slagging agent composition is: S0.04%, P0.06%, SiO 2 74%, CaF 2 5.2%, Na 2 CO 3 4.7%, CaO2.6%, Al 2 o 3 13.4%.
[0029] Smelting vanadium-titanium-iron concentrate in a blast furnace yields vanadium-titanium-containing molten iron, in which the S content is 0.095% and the temperature is 1310°C. After the molten iron enters the desulfurization station, it first sprays passivated magnesium powder for desulfurization, and the treatment time is 25 minutes. After the desulfurization is completed, add 3.2kg / tFe of the above-mentioned silicon-based desulfurization slagging agent to the vanadium-containing iron water for slag adjustment. After stirring with a slag rake for 20 seconds, the slag removal operation is carried out, and the amount of slag removal is...
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