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Using method of electroslag remelting refining slag by efficiently using returned slag

A technology of electroslag remelting and returning slag, which is applied in the field of electroslag remelting and refining slag, can solve the problems of unfavorable hydrogen content of electroslag ingots, unreasonable solutions, cumbersome preparation process, etc., and achieve uniform distribution of chemical components, surface The effect of good quality and cost reduction

Active Publication Date: 2015-04-29
ANHUI FUKAI STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent with the publication number CN101899579 uses the slag system developed by the returned slag, which is mainly used for the remelting of titanium-containing steel, and the utilization ratio of the returned slag is 21.8-48.5%. ~30%, but the preparation process is cumbersome, and the liquid slag will be broken after natural cooling, resulting in uneven particle size of the slag. At the same time, the pre-melted slag contains high CaO, and the slag will further absorb moisture after it is completely cooled, which is not conducive to electroslag Control of ingot hydrogen content
According to the existing technology of electroslag remelting and returning slag, how to efficiently use (the utilization ratio reaches more than 50%) the existing electroslag remelting and returning slag, and how to prepare new electroslag remelting and refining The various requirements of remelting are the key difficulties in resource utilization of electroslag remelting and returning slag, and no reasonable solution has been given in the prior art

Method used

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  • Using method of electroslag remelting refining slag by efficiently using returned slag
  • Using method of electroslag remelting refining slag by efficiently using returned slag
  • Using method of electroslag remelting refining slag by efficiently using returned slag

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Embodiment 1

[0029] A kind of electroslag remelting refining slag with high efficiency utilization of returned slag in this embodiment is composed of the following components in mass percentage: 50% of electroslag remelting returned slag, 35% of fluorite, 10% of alumina powder, and 5% of lime . Among them, CaF in fluorite 2 The mass percentage content of not less than 85%, SiO 2 The mass percentage content is 5 to 10%, and the Al in alumina powder 2 o 3 The mass percentage of CaO in lime is greater than 99%, and the mass percentage of CaO in lime is greater than 99%.

[0030] In this embodiment, a method for preparing electroslag remelting refining slag efficiently utilizing returned slag, the specific steps are as follows:

[0031] Step 1. Weigh the electroslag remelting return slag, fluorite, alumina powder, and lime according to the mass percentage, and crush the electroslag remelting return slag, fluorite, alumina powder, and lime into particle sizes of 10-30 mm granules, wherein:...

Embodiment 2

[0045] A kind of electroslag remelting refining slag with high efficiency utilization of returned slag in this embodiment is composed of the following components in mass percentage: 60% of electroslag remelting returned slag, 30% of fluorite, 8% of alumina powder, and 2% of lime . Among them, CaF in fluorite 2 The mass percentage content of not less than 85%, SiO 2 The mass percentage content is 5 to 10%, and the Al in alumina powder 2 o 3 The mass percentage of CaO in lime is greater than 99%, and the mass percentage of CaO in lime is greater than 99%.

[0046] In this embodiment, a method for preparing electroslag remelting refining slag efficiently utilizing returned slag, the specific steps are as follows:

[0047] Step 1. Weigh the electroslag remelting return slag, fluorite, alumina powder, and lime according to the mass percentage, and crush the electroslag remelting return slag, fluorite, alumina powder, and lime into particle sizes of 10-30 mm granules, wherein: ...

Embodiment 3

[0059] The electroslag remelting refining slag of this embodiment with high efficiency utilization of returned slag is composed of the following components in mass percentage: 70% of electroslag remelting returned slag, 24% of fluorite, and 6% of alumina powder. Among them, CaF in fluorite 2 The mass percentage content of not less than 85%, SiO 2 The mass percentage content is 5 to 10%, and the Al in alumina powder 2 o 3 The mass percentage content is greater than 99%.

[0060] In this embodiment, a method for preparing electroslag remelting refining slag efficiently utilizing returned slag, the specific steps are as follows:

[0061] Step 1. Weigh the returned slag from electroslag remelting, fluorite, and alumina powder according to the mass percentage, and break the returned slag from electroslag remelting, fluorite, and alumina powder into particles with a particle size of 10-30 mm, of which : The mass percentage of each component is: electroslag remelting return slag ...

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Abstract

The invention discloses a using method of electroslag remelting refining slag by efficiently using returned slag and belongs to the technical field of electroslag remelting refining slag. The electroslag remelting refining slag is prepared from the following components in percentage by mass: 50-80% of electroslag remelting refining slag, 16-35% of fluorite, 4-10% of aluminum oxide powder and 0-5% of lime. A preparation method comprises the following steps: after uniformly mixing a novel slag system formed by the components, pre-melting in a slagging furnace; and then, crushing liquid slag by virtue of an air quenching method. The using method comprises the following steps: roasting the electroslag remelting refining slag prepared by using the returned slag; and then by using coke as an arc striking agent, doping aluminum metallic particles into the electroslag remelting refining slag, wherein the slagging time is controlled at 30 minutes. The remelting technical process of electroslag remelting refining slag is stable, and a steel ingot is good in surface quality and uniform in chemical component distribution. The cost of the slag system is **yuan / ton which is lowered by 55-78%, so that the efficient utilization of the returned slag is realized.

Description

[0001] The patent application of the present invention is a divisional application with the application number: 2013104509800. The filing date of the original application is: September 25, 2013. The name of the invention is: an electroslag remelting refining slag and its Methods of preparation and methods of use. technical field [0002] The invention belongs to the technical field of electroslag remelting and refining slag, and in particular relates to a method for using electroslag remelting and refining slag to efficiently utilize returned slag. Background technique [0003] As a new technology of special metallurgy, electroslag metallurgy plays a pivotal role in the special steel industry. Steel ingots smelted by electroslag have high purity, low sulfur content, less non-metallic inclusions, smooth surface of steel ingots, uniform and dense crystallization, uniform metallographic structure and chemical composition, and this technology is being used more and more widely. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B9/18
Inventor 常立忠施晓芳蒋春风
Owner ANHUI FUKAI STAINLESS STEEL
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