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A kind of ladle refining furnace refining slag recycling method

A technology for ladle refining furnace and refining slag, applied in the field of iron and steel metallurgy, can solve the problems of high cost of synthetic slag, LF refining slag cannot be reused, etc., and achieve the effect of high production stability

Active Publication Date: 2019-05-17
LAIWU STEEL YINSHAN SECTION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that LF refining slag cannot be reused in the prior art and the cost of using synthetic slag in the prior art is high, the present invention provides a method for recycling refining slag

Method used

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  • A kind of ladle refining furnace refining slag recycling method
  • A kind of ladle refining furnace refining slag recycling method
  • A kind of ladle refining furnace refining slag recycling method

Examples

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Effect test

Embodiment 1

[0035] The following examples are combined with figure 1 A method for recycling refining slag is further described.

[0036] Select the refining waste slag of aluminum-killed steel, and pour the refining slag into the slag basin through the following procedures—recover the refining slag in the slag yard—natural cooling—crushing to a particle size less than 100mm—magnetic separation—sieving—recovering blocks Shaped refining waste residue (≥10mm)——Recover powdery refining waste residue (﹤10mm)

[0037] Mix the massive refining waste slag and lime as synthetic slag. The mixing ratio of massive refining waste slag and lime is 1:2. It is added with the steel flow during the process of converter tapping, and the amount of addition is 6kg. slag / ton of steel, and aluminum deoxidizer is added during the tapping process, the addition amount is about 1kg aluminum / ton of steel, and the aluminum deoxidizer reacts to form Al 2 o 3 , the resulting deoxidation product Al 2 o 3 The amount...

Embodiment 2

[0040] The following examples are shown together with the device figure 1 A method for recycling refining slag is further described.

[0041] Select the refining waste slag of aluminum-killed steel, and pour the refining slag into the slag basin through the following procedures—recover the refining slag in the slag yard—natural cooling—crushing to a particle size less than 100mm—magnetic separation—sieving—recovering blocks Shaped refining waste residue (≥3mm)——Recover powdery refining waste residue (﹤3mm)

[0042] Mix the massive refining waste slag and lime as synthetic slag, the mixing ratio of massive refining waste slag and lime is 1:4, and add it with the steel stream during the process of converter tapping, and the addition amount is 8kg synthetic slag slag / ton of steel, and aluminum deoxidizer is added during the tapping process, the addition amount is about 1kg aluminum / ton of steel, and the aluminum deoxidizer reacts to form Al 2 o 3 , the resulting deoxidation pr...

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Abstract

The invention discloses a recycling method for refining slag of a ladle refining furnace. The recycling method comprises the steps that waste refining slag of aluminum killed steel is cooled naturally, the waste refining slag is further crushed after large cast steel residues are picked out, iron particles in the waste refining slag are magnetically separated out, the waste refining slag is screened through a meshed screen after magnetic separation is completed, and blocky waste refining slag and powdery waste refining slag are screened out and recovered. According to the recycling method for the refining slag of the ladle refining furnace, the waste refining slag is recycled in metallurgy, the problem that stacking of the waste refining slag occupies a large area of land is solved, the waste refining slag is turned into wealth and plays a role in replacing an auxiliary material for steelmaking, and resources are saved.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a method for recycling refining slag in a ladle refining furnace (LF furnace). Background technique [0002] LF furnace refining waste slag is the ladle top slag poured into the slag basin after the continuous casting of molten steel in the ladle. At present, the main treatment method for metallurgical refining waste slag is to mix it with ordinary converter waste slag and stack it in the slag yard for treatment. Occupies a lot of land resources. Due to the high content of CaO in metallurgical refining waste slag, it is difficult to use the slag on a large scale in cement, ceramics and other industries. At present, it is mainly used for road construction, and its selling price is about several yuan per ton. This treatment method not only seriously pollutes the environment, but also has extremely low utilization value and wastes a lot of resources. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/064
CPCC21C7/0645C21C2200/00Y02P10/20
Inventor 刘洪银郝帅杨波王孝科路峰胡增跃邹春峰亓伟伟孙建卫袁鹏举王奉县
Owner LAIWU STEEL YINSHAN SECTION CO LTD
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