Calcium-based desulfurization slag-regulating agent for vanadium-titanium-containing molten iron, preparation method thereof and desulfurization slag-regulating method

A technology for slag conditioning agent and vanadium-titanium iron, which is applied in the field of calcium-based desulfurization slag conditioning agent for vanadium-titanium-containing molten iron and its preparation field, can solve problems such as difficulty in applying vanadium-titanium-containing molten iron, etc., so as to reduce slag scavenging iron loss and improve desulfurization Efficiency, the effect of reducing the amount of sulfur returned

Active Publication Date: 2014-03-19
PANGANG GROUP RESEARCH INSTITUTE CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned slagging agents are difficult to apply to molten iron containing vanadium and titanium

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0013] According to one aspect of the present invention, the preparation method of calcium-based desulfurization and slagging agent for vanadium-titanium-containing molten iron comprises the following steps: 60-80 parts by weight of active lime, 10-20 parts of fluorite and 10-15 parts of soda ash Grinding into powder and mixing uniformly to obtain a calcium-based desulfurization and slagging agent for molten iron containing vanadium and titanium. That is to say, the calcium-based desulfurization and slagging agent for molten iron containing vanadium and titanium can be prepared by uniformly mixing 60-80 parts by weight of active lime powder, 10-20 parts of fluorite powder and 10-15 parts of soda ash powder. Preferably, the proportion can be 71-79 parts of active lime powder, 12-18 parts of fluorite powder and 11-14 parts of soda ash powder. In addition, the particle size of active lime powder, fluorite powder and soda ash powder is preferably not greater than 3mm, so that bett...

example 1

[0023] Grind 73 parts of active lime, 15 parts of fluorite, and 12 parts of soda ash by weight into fine powder, mix evenly, and control the particle size to ≤3mm. The composition of the obtained calcium-based desulfurization and slagging agent is: S0.05%, P0.05%, CaO70%, CaF 2 14%, Na 2 CO 3 11%, SiO 2 4.4%, Al 2 o 3 0.5%.

[0024] Smelting vanadium-titanium-iron concentrate in a blast furnace yields vanadium-titanium-containing molten iron, in which the S content is 0.085% and the temperature is 1320°C. After the molten iron enters the desulfurization station, first add 2kg / tFe of the above-mentioned calcium-based 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 desulfurization treatment time is 23 minutes. After the desulfurization is completed, the slag removal operation is carried out, and the slag removal amount is 40kg / tFe.

[0025] ...

example 2

[0027] Grind 67 parts of active lime, 18 parts of fluorite, and 15 parts of soda ash into fine powder, mix well, and control the particle size to ≤3mm. The obtained calcium-based desulfurization and slagging agent composition is: S0.04%, P0.06%, CaO65%, CaF 2 17%, Na 2 CO 3 14%, SiO 2 3%, Al 2 o 3 0.6%.

[0028] Smelting vanadium-titanium-iron concentrate in a blast furnace yields vanadium-titanium-containing molten iron, in which the S content is 0.070% and the temperature is 1308°C. After the molten iron enters the desulfurization station, first add 2.5kg / tFe of the above-mentioned calcium-based desulfurization and slagging agent to the vanadium-containing molten iron, stir with a slag rake for 15 seconds, and then spray passivated magnesium powder for desulfurization. The desulfurization treatment time is 19 minutes . After the desulfurization is completed, the slag removal operation is carried out, and the amount of slag removal is 37kg / tFe.

[0029] After testing,...

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Abstract

The invention provides a calcium-based desulfurization slag-regulating agent for vanadium-titanium-containing molten iron, a preparation method thereof and a desulfurization slag-regulating method. The preparation method comprises the following step: uniformly mixing 60-80 parts by weight of active lime powder, 10-20 parts by weight of fluorite powder and 10-15 parts by weight of sodium carbonate powder, thus obtaining the calcium-based desulfurization slag-regulating agent. The calcium-based desulfurization slag-regulating agent comprises the following components in percentage by weight: no more than 0.10% of S, no more than 0.10% of P, 60-80% of CaO, 8-18% of CaF2, 10-15% of Na2CO3, 2-8% of SiO2 and no more than 1% of Al2O3. The desulfurization slag-regulating method comprises the following steps: adding the above-mentioned calcium-based desulfurization slag-regulating agent into vanadium-titanium-containing molten iron, and performing desulfurization slag regulation on the vanadium-titanium-containing molten iron. According to the invention, the desulfurization efficiency of vanadium-titanium-containing molten iron can be improved; the sulfur return amount after desulfurization of molten iron can be reduced; and the iron loss during slag removal can be reduced.

Description

technical field [0001] The invention relates to the technical field of molten iron desulfurization, more specifically, to a calcium-based desulfurization and slagging agent for vanadium-titanium-containing molten iron and a preparation method thereof, and a method for applying the calcium-based desulfurization and slag-adjusting agent to vanadium-titanium-containing molten iron The method of desulfurization and slag adjustment. Background technique [0002] Generally, for iron and steel enterprises using vanadium-containing ilmenite as raw materials, vanadium-containing ilmenite (for example, vanadium-titanium magnetite) will produce vanadium-titanium-containing molten iron after blast furnace ironmaking. When desulfurizing molten iron containing vanadium and titanium, there will be the following situations: because the blast furnace slag carried by the molten iron containing vanadium and titanium is blast furnace slag containing vanadium and titanium, the blast furnace slag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C1/02
Inventor 蒋龙奎戈文荪陈永杜丽华陈炼王建黄正华董克平施敏张家利
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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