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Slag-metal reaction simulation test device and method for continuous casting crystallizer covering slag

A continuous casting mold and simulation test technology, applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems of weakening and difficulty in the degree of slag-gold reaction, and achieve the effect of reducing test losses and wide applicability of the process

Active Publication Date: 2020-05-29
宝武特种冶金有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the static test state, TiN floats up, TiN in the steel decreases in the later stage, and the degree of slag-gold reaction is weakened. However, in the actual continuous casting state, TiN inclusions in molten steel are continuously produced. Therefore, it is necessary to judge the influence of mold flux on TiN It is difficult to really distinguish the good and bad of the mold slag

Method used

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  • Slag-metal reaction simulation test device and method for continuous casting crystallizer covering slag
  • Slag-metal reaction simulation test device and method for continuous casting crystallizer covering slag

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] The layout of the medium frequency induction furnace is attached figure 1 , using a graphite crucible 3 with a hole in the bottom, with a capacity of 150kg of molten steel; installing a bottom gun 1, the selected bottom gun 1 has an aperture of 30mm, and is connected to Ar or nitrogen, and the argon and nitrogen can be switched freely; the top of the crucible is covered with a furnace roof cover , the external protective gas blowpipe 15 of the cover plate is blown into the furnace to form a protective atmosphere in the furnace by setting the air blowing hole groove inside;

[0052] According to the quality of molten steel for smelting, steel blocks of moderate size are added to the graphite crucible 3 in batches. The steel block is melted by electricity, the top cover and the bottom gun 1 are sprayed with argon, and the induction furnace is turned on to increase the power to melt the steel block rapidly;

[0053] After the molten steel is melted, take the original stee...

Embodiment 2

[0058] The layout of the medium frequency induction furnace is attached figure 1 , use a graphite crucible 3 with a hole in the bottom, with a molten steel capacity of 200kg; install a bottom gun 1, the selected bottom gun 1 has an aperture of 40mm, and connect to Ar or nitrogen, and the argon and nitrogen can be switched freely; the top of the crucible covers the furnace roof cover , the external protective gas blowpipe 15 of the cover plate is blown into the furnace to form a protective atmosphere in the furnace by setting the air blowing hole groove inside;

[0059] According to the quality of molten steel for smelting, steel blocks of moderate size are added to the crucible in batches. The steel block is melted by electricity, the top cover and the bottom gun 1 are sprayed with argon, and the induction furnace is turned on to increase the power to melt the steel block rapidly;

[0060] After the molten steel is melted, take the original steel sample with a sample spoon. ...

Embodiment 3

[0065] The layout of the medium frequency induction furnace is attached figure 1 , use a graphite crucible 3 with a hole in the bottom, with a molten steel capacity of 300kg; install a bottom gun 1, the selected bottom gun 1 has an aperture of 60mm, and connect to Ar or nitrogen, and the argon and nitrogen can be switched freely; the top of the crucible covers the furnace roof cover , the external protective gas blowpipe 15 of the cover plate is blown into the furnace to form a protective atmosphere in the furnace by setting the air blowing hole groove inside;

[0066] According to the quality of molten steel for smelting, steel blocks of moderate size are added to the crucible in batches. The steel block is melted by electricity, the top cover and the bottom gun 1 are sprayed with argon, and the induction furnace is turned on to increase the power to melt the steel block rapidly;

[0067] After the molten steel is melted, take the original steel sample with a sample spoon. ...

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Abstract

The invention discloses a slag-metal reaction simulation test device for continuous casting crystallizer covering slag. The device comprises a medium-frequency induction furnace and a bottom blowing device. The medium-frequency induction furnace comprises a graphite crucible, a furnace shell, an induction coil and a furnace cover. The furnace shell is arranged outside the graphite crucible, the induction coil is arranged between the graphite crucible and the furnace shell and arranged on the graphite crucible in a sleeving mode, and a feeding port is formed in the furnace cover and covers thetop of the graphite crucible; the bottom blowing device comprises a bottom gun and a protective gas source which are introduced into the bottom of the graphite crucible, and the bottom gun is externally connected to the protective gas source through a protective gas blowing pipe. The invention also discloses a simulation test method which can provide dynamic slag-metal reaction and can simulate continuous TiN precipitation and simulate the slag-metal reaction degree in production under the condition of continuous steel casting by switching a bottom blowing N method, thereby more accurately judging whether the crystallizer casting powder is applicable or not.

Description

technical field [0001] The invention relates to a slag-gold reaction simulation technology, and more specifically refers to a slag-gold reaction simulation test device and method for continuous casting mold flux, and is especially suitable for Al- and Ti-containing steel types. Background technique [0002] In the continuous casting process of molten steel, the continuous casting mold is an important part used to solidify and form the initial billet shell, and it is also the "heart" of the continuous casting process. In order to prevent the exposure and oxidation of the molten steel surface during continuous casting, the molten steel surface in the mold needs to be covered with mold slag. After the mold slag is added to the crystallizer, it absorbs the heat provided by the high-temperature molten steel, and quickly forms a liquid slag layer on the molten steel surface. When the mold slag near the liquid slag layer has not reached the melting temperature, it has been sintered...

Claims

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Application Information

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IPC IPC(8): G01N33/00G01N33/205
CPCG01N33/00
Inventor 陈家昶王大智张晨卢耀华
Owner 宝武特种冶金有限公司
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