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Preparation method of efficient composite molten iron desulfurizing agent

A high-efficiency technology for desulfurization of molten iron, applied in the field of iron and steel metallurgical auxiliary materials, can solve the problems of high cost and low desulfurization efficiency, and achieve the effects of inhibiting deliquescence, improving desulfurization rate, and prolonging service life.

Inactive Publication Date: 2015-04-22
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 desulfurizer in the prior art, the present invention provides a preparation method of high-efficiency composite molten iron desulfurizer

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072]A preparation method of an efficient composite molten iron desulfurizer, the steps of which are:

[0073] (1) Ingredients, prepare materials according to the following components and mass fractions:

[0074] Zinc chloride 10 parts

[0075] 3 parts silicon manganese iron slag

[0076] Aluminum powder 30 parts

[0077] Bauxite 20 parts

[0078] Cyclic dimethyl silicone oil 5 parts

[0079] Hydraulic oil 5 parts

[0080] 5 parts soybean oil

[0081] Calcium aluminate 5 parts

[0082] 4 parts of formic acid. The role of formic acid is to increase the desulfurization activity of zinc.

[0083] (2) Preparation process:

[0084] a. above-mentioned zinc chloride is carried out passivation treatment, and its technique is as follows:

[0085] Spraying: Spray the additive on the surface of the zinc chloride powder in the container, and spray and mix evenly while spraying; among them, the additive is mixed with 5 parts of cyclic dimethyl silicone oil, 5 parts of hydraulic ...

Embodiment 2

[0098] A preparation method of an efficient composite molten iron desulfurizer, the steps of which are:

[0099] (1) Ingredients, prepare materials according to the following components and mass fractions:

[0100] Zinc chloride 12 parts

[0101] 8 parts of ferrosilicon manganese slag

[0102] Aluminum powder 32 parts

[0103] Bauxite 24 parts

[0104] Cyclic dimethyl silicone oil 6 parts

[0105] 7 parts of hydraulic oil

[0106] 8 servings of soybean oil

[0107] Calcium aluminate 7 parts

[0108] 6 parts of oxalic acid.

[0109] (2) Preparation process:

[0110] a. above-mentioned zinc chloride is carried out passivation treatment, and its technique is as follows:

[0111] Spraying: Spray the additive on the surface of the zinc chloride powder in the container, and spray and mix evenly by rotating while spraying; among them, the additive is mixed with 6 parts of cyclic dimethyl silicone oil, 7 parts of hydraulic oil and 8 parts of soybean oil made;

[0112] Heat ...

Embodiment 3

[0124] A preparation method of an efficient composite molten iron desulfurizer, the steps of which are:

[0125] (1) Ingredients, prepare materials according to the following components and mass fractions:

[0126] Zinc chloride 15 parts

[0127] 10 parts of ferrosilicon manganese slag

[0128] Aluminum powder 35 parts

[0129] Bauxite 25 parts

[0130] Cyclic dimethyl silicone oil 10 parts

[0131] 10 parts of hydraulic oil

[0132] 10 parts soybean oil

[0133] Calcium aluminate 8 parts

[0134] 8 parts of organic acid.

[0135] (2) Preparation process:

[0136] a. above-mentioned zinc chloride is carried out passivation treatment, and its technique is as follows:

[0137] Spraying: Spray the additive on the surface of the zinc chloride powder in the container, and spray and mix evenly while spraying; among them, the additive is mixed with 10 parts of cyclic dimethyl silicone oil, 10 parts of hydraulic oil and 10 parts of soybean oil made;

[0138] Heat preservati...

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Abstract

The invention discloses a preparation method of an efficient composite molten iron desulfurizing agent and belongs to the technical field of ferrous metallurgy auxiliary materials. The preparation method comprises the following steps: (1) burdening; (2) preparation process: a, performing passivation treatment on zinc chloride by virtue of a process which comprises spraying, namely spraying additives onto the surface of the zinc chloride powder in a container, and heat preservation, namely preserving heat for 4 minutes at a temperature ranging from 100 to 1050 DEG C so that the additives are boiled and completely volatilized to be absorbed by the cured zinc chloride to form a protective film; b, evenly mixing the materials with the material in the step a and performing drying pretreatment; pouring the passivation liquid into the materials, stirring, cooling naturally and grinding to obtain the powdery finished product; and (3) putting the powdery finished product into a damp-proof container or bag and sealing for later use. According to the preparation method of the efficient composite molten iron desulfurizing agent, high efficiency of molten iron desulfurization and energy conservation can be realized, the composite cost of molten iron desulfurization is not increased, the sulfur content in the desulfurized molten iron is less than 0.010%, and the desulfurization time is only 50% 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 preparation method of a high-efficiency composite 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 l...

Claims

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Application Information

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