Hot metal desulfurizer and its application

A technology for desulfurization of molten iron and vanadium titanomagnetite is applied in the field of molten iron smelting, which can solve the problems of high price, high use cost and prevent moisture absorption, and achieve the effects of good slag state, safe use and easy slag removal.

Active Publication Date: 2017-09-29
攀枝花钢城集团瑞矿工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the price of magnesium is relatively high, so moisture absorption must be prevented during storage, and the cost of use is relatively high.

Method used

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  • Hot metal desulfurizer and its application
  • Hot metal desulfurizer and its application
  • Hot metal desulfurizer and its application

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0029] Below in conjunction with embodiment the present invention is further described. However, the protection scope of the present invention is not limited to the scope of the embodiments.

[0030] Table 1 Ratio of molten iron desulfurizer

[0031] raw material name

chemical components

Example 1

Example 2

Example 3

Quartz sand

SiO 2 55%

60

67

75

quicklime

CaO40%

10

9

8

fluorite

CaF 2 78%

6

7

4

soda ash

Na 2 CO 3 98%

9

9

8

Aluminum oxide

Al 2 o 3 80%

15

8

5

[0032] The ratio of raw materials in Table 1 is the mass fraction.

[0033] The raw materials were weighed according to the ratio of raw materials in Table 1, crushed to a particle size of ≤1 mm, and mixed to obtain the molten iron desulfurizers of Examples 1, 2, and 3.

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Abstract

The invention belongs to the technical field of molten iron smelting, and particularly relates to a molten iron desulfurizer and application thereof. The technical problem to be solved by the present invention is to provide a molten iron desulfurizer with low production cost and safe use. In order to solve the above-mentioned technical problems, the molten iron desulfurizer of the present invention comprises the following components in parts by mass: SiO 33 parts-41 parts CaO 3.2 parts-4 parts, CaF 3.1 parts-5.5 parts, Na CO 7.8 parts-8.8 parts, Al O 4-12 parts, the rest are unavoidable impurities. The molten iron desulfurizer of the invention has better desulfurization effect, safe storage and use, good slag state, easy slag removal, can meet the desulfurization requirements of steel enterprises, and is especially suitable for vanadium titanomagnetite molten iron desulfurization.

Description

technical field [0001] The invention belongs to the field of molten iron smelting, and in particular relates to a molten iron desulfurizer and its application. Background technique [0002] At present, the hot metal desulfurizers commonly used in my country's ironmaking enterprises mainly include soda ash, lime powder, calcium carbide powder and metal magnesium. [0003] Soda ash desulfurization has a simple process and equipment, but its disadvantage is that the slag produced during the desulfurization process will corrode the lining of the treatment tank, and the smoke and dust produced will pollute the environment and be harmful to the human body. Few companies use this method for desulfurization. [0004] Lime powder desulfurization, lime is cheap and safe to use, but it is easy to form a dense layer of dicalcium silicate on the surface of lime powder particles, which limits the desulfurization reaction. Therefore, a large amount of lime is used, resulting in a large a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/064C21C1/02
Inventor 青光红陈涛田爽郑德明袁兵
Owner 攀枝花钢城集团瑞矿工业有限公司
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