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A kind of molten iron desulfurizer

A technology for desulfurization and mass fraction of molten iron is applied in the field of iron and steel metallurgy auxiliary materials, which can solve the problems of high cost and low desulfurization efficiency, and achieve the effects of suppressing the degree of volatilization, improving the desulfurization rate, and shortening the desulfurization time.

Inactive Publication Date: 2017-01-18
WUHU JINLONG MOLD FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of high cost and low desulfurization efficiency of molten iron desulfurizers in the prior art, the present invention provides a molten iron desulfurizer

Method used

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  • A kind of molten iron desulfurizer
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] The preparation method of desulfurizing agent of the present invention, step is as follows:

[0062] (1) Take 80 parts of CaO for passivation treatment, the process is as follows:

[0063] a. Spraying: Mix 80 parts of water and 80 parts of CaO in a container, and then spray the additive (5 parts of cyclic dimethyl silicone oil, hydraulic oil and soybean oil) on the lime surface, and rotate while spraying Spray and mix in the same way;

[0064] Among them, the raw material parameters are as follows: lime containing CaO ≥ 70-88%, its S ≤ 0.05%, activity ≥ 250ml / 4N (HCl), loss of ignition < 0.5%, angle of repose < 35°, after passivation treatment, particle size 0.01 to 0.1mm.

[0065] b. Heat preservation: heat preservation at 100~1050°C for 4 minutes to make the additive boil and completely volatilize and be absorbed by slaked lime to form a protective film;

[0066] (2) After mixing the following ingredients with the materials prepared in step (1), dry pretreatment: ...

Embodiment 2

[0077] The preparation method of desulfurizing agent of the present invention, step is as follows:

[0078] (1) Take 82 parts of CaO for passivation treatment, the process is as follows:

[0079] a. Spraying: Mix water and CaO in a mass ratio of 1:1 in a container, then spray the additive on the lime surface, and spray and mix evenly while spraying; wherein, the additive is cyclic dimethyl silicone oil 8 parts, hydraulic oil 9 parts, soybean oil 5 parts;

[0080] b. Heat preservation: heat preservation at 100~1050°C for 4 minutes to make the additive boil and completely volatilize and be absorbed by slaked lime to form a protective film;

[0081] (2) After mixing the following ingredients with the materials prepared in step (1), dry the pretreatment;

[0082] C 7 copies

[0083] Mg 7 parts

[0084] Zn 6 parts

[0085] Calcium aluminate 7 parts

[0086] 8 parts of soda ash,

[0087] Then pour the passivation solution into the above materials, stir until the materials are...

Embodiment 3

[0091] The preparation method of desulfurizing agent of the present invention, step is as follows:

[0092] (1) Take 85 parts of CaO for passivation treatment, the process is as follows:

[0093] a. Spraying: Mix water and CaO in a mass ratio of 1:1 in a container, then spray the additive on the lime surface, and spray and mix evenly while spraying while rotating; wherein, the additive is cyclic dimethyl silicone oil 10 parts, hydraulic oil 10 parts, soybean oil 10 parts mixed;

[0094] b. Heat preservation: heat preservation at 100~1050°C for 4 minutes to make the additive boil and completely volatilize and be absorbed by slaked lime to form a protective film;

[0095] (2) After mixing the following ingredients with the materials prepared in step (1), dry the pretreatment;

[0096] C 10 copies

[0097] Mg 10 parts

[0098] Zn 10 parts

[0099] Calcium aluminate 8 parts

[0100] 10 parts of soda ash.

[0101] Among them, soda ash contains more than 90% Na 2 CO 3 , S w...

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Abstract

The invention discloses a hot metal desulfurizing agent and belongs to the technical field of auxiliary materials of ferrous metallurgy. Aiming at the problems in the prior art that the hot metal desulfurizing agent is high in cost and the desulfurization efficiency is low, the desulfurizing agent disclosed by the invention comprises the following components in parts by mass: 80-85 parts of CaO, 5-10 parts of C, 5-10 parts of Mg, 5-10 parts of Zn, 5-10 parts of cylic dimethyl organic silicone oil, 5-10 parts of hydraulic oil, 5-10 parts of soya-bean oil, 5-8 parts of calcium aluminate and 5-10 parts of sodium carbonate. According to the technical scheme disclosed by the invention, compared with the prior art, the amount of magnesium is reduced, the cost is reduced, and the magnesium is passivated, so that the usage rate is greatly improved. With the adoption of the technical scheme in the invention, the sulfur content of the hot metal after desulfurization can be less than 0.010 percent, and the desulfurization time is only 50 percent of the traditional desulfurization time.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgical auxiliary materials, and more specifically relates to a molten iron desulfurizer. Background technique [0002] Sulfur in steel has adverse effects on the properties of steel, reducing the plasticity and toughness of steel, and reducing the surface and microstructure of steel. The steel required by modern industry requires that the sulfur content should be <0.015%. In order to reduce the sulfur content in steel and improve the quality level of steel. The desulfurization technology of hot metal treatment outside the furnace has become an indispensable link in the steelmaking process. [0003] Hot metal desulfurizers are divided into four categories: lime, calcium carbide, soda, and magnesium. Some other substances, such as rare earth element cerium, have a strong affinity with sulfur, but their desulfurization ability is lower than that of magnesium, and the cost is high,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/064C21C1/02
Inventor 李大志
Owner WUHU JINLONG MOLD FORGING
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