Desulfurization and slag adjustment agent for vanadium-containing titanium molten iron, its preparation method and desulfurization and slag adjustment method
A technology of slag adjusting agent and vanadium-titanium iron, which is applied in the field of hot metal desulfurization, can solve the problems that it is difficult to apply vanadium-titanium-containing hot metal, etc., and achieve the effects of reducing iron loss during slag removal, improving desulfurization efficiency, and reducing the amount of sulfur returned
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[0013] According to one aspect of the present invention, the preparation method of vanadium-titanium-containing molten iron with desulfurization and slagging agent comprises the following steps: 30 to 40 parts by weight of quartz sand, 5 to 10 parts of fluorite, 5 to 10 parts of soda ash, 30 parts by weight -40 parts of active lime and 10-20 parts of alumina (for example, aluminum ash, alumina powder, etc.) are ground into powder and mixed uniformly to obtain a desulfurization and slagging agent for vanadium-titanium molten iron. That is to say, the desulfurization and slagging agent for vanadium-titanium molten iron can be composed of 30-40 parts by weight of quartz sand powder, 5-10 parts of fluorite powder, 5-10 parts of soda ash powder, and 30-40 parts of active lime powder. It is evenly mixed with 10-20 parts of alumina powder. The preferred ratio can be 32-38 parts of quartz sand powder, 6-9 parts of fluorite powder, 6-9 parts of soda ash powder, 32-38 parts of active li...
example 1
[0023] Grind 38 parts of quartz sand, 6 parts of fluorite, 8 parts of soda ash, 32 parts of active lime and 16 parts of alumina powder by weight into fine powder, mix evenly, and control the particle size to ≤3mm. The composition of the obtained desulfurization and slagging agent is: S0.04%, P0.06%, SiO 2 37.6%, CaF 2 5.5%, Na 2 CO 3 8%, CaO31%, Al 2 o 3 17.8%.
[0024] Smelting vanadium-titanium-iron concentrate in a blast furnace yields vanadium-titanium-containing molten iron, in which the S content is 0.083% and the temperature is 1316°C. After the molten iron enters the desulfurization station, first add 3.5kg / tFe of the above-mentioned desulfurization and slagging agent to the vanadium-containing molten iron, stir with a slag rake for 20 seconds, and then spray passivated magnesium powder for desulfurization. The treatment time is 20 minutes. After the desulfurization is completed, the slag removal operation is carried out, and the amount of slag removal is 41kg / tF...
example 2
[0027] Grind 35 parts of quartz sand, 9 parts of fluorite, 6 parts of soda ash, 35 parts of active lime and 15 parts of aluminum ash by weight into fine powder, mix evenly, and control the particle size to ≤3mm. The composition of the obtained desulfurization and slagging agent is: S0.05%, P0.05%, SiO 2 34.8%, CaF 2 8.4%, Na 2 CO 3 5.5%, CaO34%, Al 2 o 3 17.2%.
[0028] 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 1308°C. After the molten iron enters the desulfurization station, first add 4.5kg / tFe of the above-mentioned desulfurization and slagging agent to the vanadium-containing molten iron, stir with a slag rake for 20 seconds, and then spray passivated magnesium powder for desulfurization. The treatment time is 24 minutes. After the desulfurization is completed, the slag removal operation is carried out, and the amount of slag removal is 43kg / tF...
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