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Recycling method for pulling ladles into refining slag

A technology for refining slag and ladle, applied in the field of smelting, can solve problems such as affecting the yield of steel materials, and achieve the effect of reducing costs

Inactive Publication Date: 2013-09-25
JIGANG GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The casting machine controls the slag, and the refining slag is accompanied by a certain amount of poured molten steel, which is discarded along with the refining slag, which seriously affects the yield of steel materials

Method used

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  • Recycling method for pulling ladles into refining slag
  • Recycling method for pulling ladles into refining slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In this embodiment, the steelmaking method is as follows:

[0054] Torpedo hot metal → ladle iron → KR hot metal pretreatment / KR slagging → converter smelting → LF refining → refined slag enters the caster → the surplus refined slag is poured into the iron ladle → the ladle is mixed with iron, repeat the above process.

[0055] During the process of ladle mixing with iron, the tapping speed is 20-25 tons / min. When the tapping reaches 75-80 tons, if a boiling reaction occurs, the tapping will be stopped immediately, and a small flow will be used after the liquid level is stable. For tapping, the flow rate of the small flow tapping is controlled at 15-20 tons / min;

[0056] If there is no boiling reaction, tap the iron at a rate of 18-20 tons / min to ensure that the molten iron can agitate the refining slag.

[0057] For example, after the molten iron is mixed with iron, after the KR slagging treatment, the KR slagging is divided into three levels according to the requirements of...

Embodiment 2

[0066] In this embodiment, the steelmaking method is as follows:

[0067] Torpedo hot metal → ladle iron → KR hot metal pretreatment / KR slagging → converter smelting → LF refining → refined slag enters the caster → the surplus refined slag is poured into the iron ladle → the ladle is mixed with iron, repeat the above process.

[0068] During the process of ladle ironing, the tapping speed is about 20 tons / min. When the tapping reaches about 75 tons, if boiling reaction occurs, the tapping will be stopped immediately. After the liquid level is stable, the tapping will be performed at a small flow rate. , The flow rate of the small flow rate of iron is controlled at 18 tons / min;

[0069] If there is no boiling reaction, tap the iron at a rate of about 20 tons / minute to ensure that the molten iron can stir the refining slag.

[0070] For example, after the molten iron is mixed with iron, after the KR slagging treatment, the KR slagging is divided into three levels according to the requ...

Embodiment 3

[0078] In this embodiment, the steelmaking method is as follows:

[0079] Torpedo hot metal → ladle iron → KR hot metal pretreatment / KR slagging → converter smelting → LF refining → refined slag enters the caster → the surplus refined slag is poured into the iron ladle → the ladle is mixed with iron, repeat the above process.

[0080] During the process of ladle to iron, the tapping speed is about 25 tons / min. When the tapping reaches about 78 tons, if a boiling reaction occurs, the tapping will be stopped immediately. After the liquid level is stable, the tapping at a small flow rate will be used. , The flow rate of the small flow rate of iron is controlled at 18 tons / min;

[0081] If there is no boiling reaction, tap the iron at a rate of about 20 tons / minute to ensure that the molten iron can stir the refining slag.

[0082] For example, after the molten iron is mixed with iron, after the KR slagging treatment, the KR slagging is divided into three levels according to the require...

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Abstract

The invention belongs to the technical field of smelting and specifically relates to a recycling method for putting ladles into refining slag. The recycling method for putting ladles into refining slag comprises following steps: melted iron in a torpedo ladle-adding iron into a iron ladle-pretreatment of KR melted iron / KR slagging off-smelting in a converter-LF refining-letting refining slag enter a chamber machine-recycling and putting the surplus refining slag into the iron ladle-adding iron into the iron ladle and repeating above processes. The method has beneficial effects that the refining slag is effectively recycled and relevant characteristics thereof are fully used for the second time, melted iron desulphurization is realized and KR desulphurization cost is effectively reduced; surplus molten steel in the refining slag during pouring is completely recycled, reducing the consumption of steel and iron materials; the refining slag has a certain temperature and floats on a slag iron interface in order to realize good isolation; the process flow is simplified. The desulphurization can be completed through the KR slagging-off treatment during the melted iron desulphurization in the refining slag, buying time for production and organization in the converter.

Description

Technical field [0001] The invention belongs to the technical field of smelting, and in particular relates to a method for recycling a molten iron ladle with refining slag. Background technique [0002] In the field of smelting technology, hot metal desulfurization has become one of the important components of modern steel and metallurgical enterprises to optimize the process flow. Hot metal desulfurization has become the improvement of steel quality, expansion of varieties, improvement of steelmaking operations, lightening of smelting burden, and reduction of slagging material consumption and smelting An important means of cost, reducing the sulfur content of steel grades is conducive to improving the mechanical and technological properties of steel. [0003] The existing smelting methods are: [0004] Torpedo molten iron → ladle iron → KR hot metal pretreatment → converter smelting → LF refining → refined slag enters the casting machine → refined slag dumping site. [0005] Current...

Claims

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Application Information

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IPC IPC(8): C21C7/064
CPCY02P10/20
Inventor 赵珉李长新李作鑫胡勤东张炳光徐学永曹运涛路长艳
Owner JIGANG GRP
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