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Composite slag weir and preparation method thereof

A slag retaining weir and composite technology, which is applied in the field of slag retaining weir and its preparation, can solve the problem that the aluminum-magnesium slag retaining weir is not as cost-effective as the magnesium slag retaining weir, the aluminum-magnesium material pollutes molten steel, and the aluminum-magnesium material price Advanced problems, to achieve the effect of reducing production costs, synchronizing service life, and extending service life

Active Publication Date: 2010-03-03
浙江红鹰集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this reason, some steel mills use aluminum-magnesium materials with better corrosion resistance to make slag retaining weirs. Although this greatly improves the service life of slag retaining weirs, aluminum-magnesium materials have greater pollution to molten steel, and The price of aluminum and magnesium materials is very high, so the cost performance of aluminum and magnesium slag weir is not as good as that of magnesium slag weir

Method used

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  • Composite slag weir and preparation method thereof
  • Composite slag weir and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1, a composite slag retaining weir, the molten steel retaining part 2 at the lower part of the weir body is made of magnesia material, and its specific composition and composition ratio by weight percentage are: 85% fused magnesia, 8% silicon micropowder , alumina powder 6.48%, sodium tripolyphosphate 0.2%, organic polycarboxylate water reducer 0.15%, retarder 0.15%, organic explosion-proof fiber 0.02%; the slag retaining part 1 on the upper part of the weir is made of aluminum magnesium material Production, its specific composition and composition ratio by weight percentage are: bauxite 44%, fused magnesia 25%, silicon micropowder 1%, alumina powder 8%, corundum powder 15%, magnesium aluminum spinel 6.73% , 0.2% sodium tripolyphosphate, 0.05% sodium hexametaphosphate, 0.02% organic explosion-proof fiber. The retarder is potassium sodium tartrate, and the organic anti-explosion fiber is polyurethane fiber.

[0027] The preparation method adopts horizontal compo...

Embodiment 2

[0030] Example 2, a composite slag retaining weir, the molten steel retaining part 2 at the lower part of the weir body is made of magnesia material, and its specific composition and composition ratio by weight percentage are: 90% fused magnesia, 5% silicon micropowder , alumina powder 4.48%, sodium tripolyphosphate 0.2%, organic polycarboxylate water reducer 0.15%, retarder 0.15%, organic explosion-proof fiber 0.02%; the slag retaining part 1 on the upper part of the weir is made of aluminum magnesium Production, its specific composition and composition ratio by weight percentage are: bauxite 47%, fused magnesia 20%, silicon micropowder 2%, alumina powder 5%, corundum powder 17.73%, magnesium aluminum spinel 8% , 0.2% sodium tripolyphosphate, 0.05% sodium hexametaphosphate, 0.02% organic explosion-proof fiber. The retarder is sodium citrate, and the organic anti-explosion fiber is polyurethane fiber.

[0031] The preparation method adopts the upper and lower composite method...

Embodiment 3

[0034] Example 3, a composite slag retaining weir, the molten steel part at the lower part of the weir body is made of magnesia material, and its specific components and proportions by weight percentage are: fused magnesia 95%, silicon micropowder 2%, Alumina powder 2.48%, sodium tripolyphosphate 0.2%, organic polycarboxylate water reducer 0.15%, retarder 0.15%, organic explosion-proof fiber 0.02%; Its specific components and proportions by weight percentage are: bauxite 50%, fused magnesia 15%, silicon micropowder 3%, alumina powder 2%, corundum powder 20%, magnesium aluminum spinel 9.73%, three Sodium polyphosphate 0.2%, sodium hexametaphosphate 0.05%, organic explosion-proof fiber 0.02%. Among them, the retarder is sodium oxalate, and the organic anti-explosion fiber is polyurethane fiber.

[0035] The preparation method is the same as in Example 2.

[0036] The product has been physically tested: the bulk density is 2.70g / cm 3 , The flexural strength is 9.11MPa, the com...

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Abstract

The invention discloses a composite slag weir and a preparation method thereof; and a body of the slag weir is integrally and tightly connected by an upper slag baffling part and a lower molten steelbaffling part. The upper slag baffling part is manufactured by aluminum and magnesium materials; and the lower molten steel baffling part is manufactured by magnesium materials. Based on the situations that the lower part of the body of the slag weir is mainly contacted with the molten steel with more assuasive erosiveness; while the upper part of the body of the slag weir is mainly contacted withthe slag with stronger erosiveness, the magnesium materials with common corrosion resistance as well as the aluminum and magnesium materials with stronger corrosion resistance are respectively adopted as the manufacturing materials for the upper slag baffling part and the lower molten steel baffling part of the slag weir, and the upper part and the lower part of the body of the slag weir of different materials are organically connected into a whole through a preparation technique. The composite slag weir reasonably uses durable goods resources, which not only guarantees the slag weir not to generate pollution to the molten steel, but also greatly prolongs the service life of the slag weir, simultaneously, the service life of the upper part and the lower part of the slag weir is led to bebasically synchronous, thus most economically using the slag weir and effectively reducing the production cost.

Description

technical field [0001] The invention relates to a slag retaining weir for a metallurgical continuous casting tundish and a preparation method thereof. Background technique [0002] The purpose of setting up the slag weir in the continuous casting tundish is to change the movement track of the steel flow, so as to properly prolong the residence time of the molten steel in the tundish, so that the inclusions in it have enough time to fully collide, gather, and float up to purify the molten steel. Now steel mills implement continuous casting of blast furnaces. In practice, it is found that when the original magnesia slag retaining weir is used for more than 10 hours, the lower part of the slag retaining weir corresponding to the molten steel area is still intact, but its upper part corresponds to The slag retaining weir in the slag area above the molten steel has been eroded into a perforated shape and lost its due function as a slag retaining weir. For this reason, some steel...

Claims

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Application Information

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IPC IPC(8): B22D11/118
Inventor 虞炳泉叶小星严培忠唐宁
Owner 浙江红鹰集团股份有限公司
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