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Metallurgy type refining slag special for ladle and manufacture method thereof

A technology for refining slag and metallurgy, which is applied in the field of special metallurgical refining slag for ladle and its preparation, can solve the problems of affecting the internal quality and mechanical properties of steel plates, reducing the purity of molten steel, and internal defects of casting damage. Improved mechanical properties and good fluidity

Active Publication Date: 2009-01-14
XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as the market has higher and higher requirements for product quality, if the amount of slag in the converter is large, the molten iron is not pretreated, and the smelting pace is fast, the purity of molten steel will be reduced, and the phosphorus and sulfur content will be high, resulting in casting failure and solidification process. Intensification of internal segregation and enrichment of harmful substances will cause defects in the casting, which will eventually affect the improvement of the internal quality and mechanical properties of the steel plate, affect the use of customers, restrict product sales, and thus affect the profit of the enterprise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0022] The preparation method that the present invention takes is as follows:

[0023] Various qualified raw materials such as highly active lime, fluorite powder, AD 30 , magnesia, and pre-melted refining slag are crushed to the specified particle size, and then crushed into granular shapes of 6-12 mm, and then the various raw materials are measured and dosed according to the stated ratio, and the prepared raw materials are put into the mixer and mixed for 40-40 mm. After 60 minutes, put the stirred powder into the mixing tank and stir for 30-50 minutes; test, and the qualified products are sealed and packaged for storage.

[0024] The grade of the high active lime is higher than 95%, and the effect is better.

[0025] The raw materials described are highly active lime, fluorite powder, AD 30 , magnesia, and pre-melted refining slag are available on the market.

Embodiment 1

[0026] Embodiment 1: The special metallurgical refining slag for ladle of the present invention is composed of the following substances in weight percentage: 50% highly active lime, 8% fluorite powder, AD 30 12%, magnesia powder 1%, pre-melted refining slag 29%.

[0027] The preparation method that the present invention takes is as follows:

[0028] Various qualified raw materials such as highly active lime, fluorite powder, AD 30 , magnesia, and pre-melted refining slag are crushed to the specified particle size, and broken into granular shapes of 6-12 mm. The particle size of various materials must be appropriate, so as to ensure that the products are melted evenly and have less smoke and dust after being put into the ladle. In order to ensure the refining effect At the same time, it is beneficial to environmental protection; then the various raw materials are measured and proportioned according to the ratio, the prepared raw materials are put into the mixer and mixed for 4...

Embodiment 2

[0029] Embodiment 2: The special metallurgical type refining slag for ladle of the present invention is made up of the following substances by weight percentage: high active lime 58%, fluorite powder 7%, AD 30 15%, magnesia powder 3%, pre-melted refining slag 17%.

[0030] The preparation method that the present invention takes is as follows:

[0031] Various qualified raw materials such as highly active lime, fluorite powder, AD 30 , magnesia, and pre-melted refining slag are crushed to the specified particle size, and broken into granular shapes of 6-12 mm. The particle size of various materials must be appropriate, so as to ensure that the products are melted evenly and have less smoke and dust after being put into the ladle. In order to ensure the refining effect At the same time, it is beneficial to environmental protection; then the various raw materials are measured and proportioned according to the ratio, the prepared raw materials are put into the mixer and mixed for...

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Abstract

The invention relates metallurgical auxiliary materials used for molten steel refinement in the metallurgy field, in particular to metallurgy type steel ladle refining slag used for deeply desulfurizing and strongly absorbing various impurities in molten steel. The metallurgy type steel ladle refining slag is characterized in that the metallurgy type steel ladle refining slag is composed of the substances according to the weight percentages, namely, high activity lime accounting for 50 percent to 65 percent, fluorite powder accounting for 5 percent to 10 percent, AD30 accounting for 10 percent to 20 percent, magnesia powder accounting for 1 percent to 5 percent and pre-melting type refining slag accounting for 15 percent to 35 percent. The metallurgy type steel ladle refining slag adopts the preparation method that the high activity lime stone, good quality fluorite, AD30, pre-melting type refining slag and magnesia powder are selected as raw material, which are broken into particles of 6 mm to 12 mm according to the component range of the metallurgy type steel ladle refining slag to blend the ratio, and then the particles are packed into finished products according to the weight requirement. The metallurgy type steel ladle refining slag is mainly used for secondary refining for the molten steel without being treated through the refining furnace, the purposes of the effective absorbing of various impurities in the molten steel, the deep desulphurization, and the like in a short time and the refinement of the molten steel are achieved, and the cost of using the refining furnace is saved.

Description

[0001] The technical field [0002] The invention relates to a steelmaking mold slag, in particular to a special metallurgical refining slag for ladle that can quickly change the performance of ladle slag and improve the ability of ladle slag to absorb inclusions, thereby purifying molten steel and its preparation method; In the case of equipment processing, the refining effect is achieved by adding special metallurgical refining slag for the ladle. It is a special metallurgical auxiliary material product and is suitable for ladle refining. Background technique [0003] At present, most of the ladle refining slag used in my country's steel mills is used in the refining furnace, there are pre-melted and non-pre-melted, and after being added, it is refined in the refining furnace for 30-50 minutes to refine the molten steel and balance the composition of the molten steel. . However, many steel mills are reluctant to go through the refining furnace for some steel grades with low ...

Claims

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Application Information

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IPC IPC(8): C21C7/076
CPCY02P10/20
Inventor 李晓阳秦教武陈永艳吴彦
Owner XIXIA LONGCHENG METALLURGICAL MATERIALS CO LTD
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