Aluminum magnesium continuous casting tundish slag-retaining wall and preparation method thereof

A continuous casting, aluminum-magnesium technology, applied in the field of refractory materials, can solve the problems of low cost performance and high manufacturing cost, etc., and achieve the effects of good resistance to molten steel erosion, long service life, and simple preparation methods

Inactive Publication Date: 2012-12-05
武钢集团有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The patent "a continuous casting tundish slag retaining wall made of composite material and its preparation process" (publication number CN101869970A) involves the preparation of aluminum-magnesium castables for tundish slag retaining walls, but it uses fused white corundum as the aggregate, plate Shaped corundum is fine powder, the manufacturing cost is very expensive, and it does not have the characteristics of high cost performance

Method used

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  • Aluminum magnesium continuous casting tundish slag-retaining wall and preparation method thereof

Examples

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Effect test

Embodiment 1

[0029] In this example, the parts by weight of the components of the slag retaining wall of the aluminum-magnesium continuous casting tundish are as follows: high alumina aggregate: 50, magnesium aggregate: 20, fine powder: 20, fine powder: 5, binder : 5, explosion-proof agent: 0.1, water reducing agent: 0.1. Among them, high alumina aggregates include: 8mm2 o 3 The first-grade bauxite with a content of ≥79% accounts for 28%, 17%, 20%, 20% and 15% by weight of the high-alumina aggregate. Magnesia aggregates include: 3mm2 micronized, the SiO 2 Micropowder, SiO 2 Content ≥ 92%, particle size ≤ 45μm. The binder is calcium aluminate cement, and in the calcium aluminate cement, Al 2 o 3 Content ≥ 69%, CaO content ≤ 30%. The explosion-proof agent is polypropylene fiber. The water reducer is a mixture of sodium tripolyphosphate and sodium hexametaphosphate.

Embodiment 2

[0031] In this example, the parts by weight of the components of the slag retaining wall of the aluminum-magnesium continuous casting tundish are as follows: high-alumina aggregate: 70, magnesium aggregate: 5, fine powder: 20, fine powder: 2, binder : 3, explosion-proof agent: 1, water reducing agent: 0.5. Among them, high alumina aggregates include: 8mm2 o 3The super-grade bauxite with a content ≥ 85% accounts for 30%, 15%, 18%, 22% and 15% by weight of the high-alumina aggregate. Magnesia aggregates include: sintered magnesia with MgO content ≥85% in three grades of 5mm2 Micropowder and α-Al 2 o 3 A mixture of micropowders, the SiO 2 Micropowder, SiO 2 Content ≥ 92%, particle size ≤ 45μm, the α-Al 2 o 3 In micropowder, α-Al 2 o 3 Content ≥ 99%, particle size ≤ 2μm. The binder is calcium aluminate cement, and in the calcium aluminate cement, Al 2 o 3 Content ≥ 69%, CaO content ≤ 30%. The explosion-proof agent is glass fiber. The water reducer is sodium tripolypho...

Embodiment 3

[0033] In this example, the parts by weight of the components of the slag retaining wall of the aluminum-magnesium continuous casting tundish are as follows: high alumina aggregate: 60, magnesium aggregate: 8, fine powder: 22, fine powder: 3, binder : 7. Anti-explosion agent: 3. Water reducing agent: 2. Among them, high alumina aggregates include: 8mm2 o 3 The super-grade bauxite with a content ≥ 85% accounts for 32%, 13%, 20%, 22% and 13% by weight of the high-alumina aggregate. Magnesia aggregates include: 8mm2 Micropowder and α-Al 2 o 3 A mixture of micropowders, the SiO 2 Micropowder, SiO 2 Content ≥ 92%, particle size ≤ 45μm, the α-Al 2 o 3 In micropowder, α-Al 2 o 3 Content ≥ 99%, particle size ≤ 2μm. The binder is calcium aluminate cement, and in the calcium aluminate cement, Al 2 o 3 Content ≥ 69%, CaO content ≤ 30%. The explosion-proof agent is stainless steel fiber. The water reducer is dispersed alumina (brand: ADS1 / ADW1, produced by Qingdao Anmai Alumi...

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Abstract

The invention discloses an aluminum magnesium continuous casting tundish slag-retaining wall. The aluminum magnesium continuous casting tundish slag-retaining wall consists of the following components by weight: 50 to 70 parts of high-aluminum aggregate, 5 to 20 parts of magnesium aggregate, 20 to 25 parts of fine powder, 0 to 8 parts of micropowder, 3 to 8 parts of bonding agent, 0.05 to 3 parts of antidetonant and 0.05 to 3 parts of water-reducing agent, wherein the sum of the weight parts of the high-aluminum aggregate, the magnesium aggregate, the fine powder, the micropowder and the bonding agent is 100; the fine powder is one or more of fused white corundum, fused brown corundum, superfine alumina with the Al2O3 content of more than or equal to 85 percent, fused magnesia with the MgO content of more than or equal to 95 percent and sintered magnesia with the MgO content of more than or equal to 85 percent and has the granularity of less than or equal to 0.088 mm; the micropowder is one or two of SiO2 micropowder and active alpha-Al2O3 micropowder; in the SiO2 micropowder, the SiO2 content is more than or equal to 92 percent and the granularity is less than or equal to 45 microns; and in the alpha-Al2O3 micropowder, the alpha-Al2O3 content is more than or equal to 99 percent and the granularity is less than or equal to 2 microns. The invention also discloses a preparation method for the tundish slag-retaining wall. The preparation method is simple and low in cost. The prepared tundish slag-retaining wall has unobvious linear change and long service life.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to an aluminum-magnesium continuous casting tundish slag retaining wall and a preparation method thereof. Background technique [0002] The furnace age of the converter is an important technical and economic index in the converter steelmaking, and it is an important factor for the steelmaking plant to exert its benefits. Increasing the furnace life of the converter can not only improve the production efficiency of the converter, reduce the consumption of refractory materials, ensure the operation rate of the continuous casting machine, but also give full play to the comprehensive benefits of the blast furnace, steelmaking, steel rolling and other systems. [0003] The main function of setting the slag retaining wall in the tundish is to change the flow field of the molten steel, so as to properly prolong the residence time of the molten steel in the tundish,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 王志强洪学勤田先明郑吉红高永生曹志明曹一
Owner 武钢集团有限公司
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