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Aluminum/zinc composite ultralow-carbon alumina-magnesite carbon brick for ladle lining

A carbon-magnesium-aluminum-carbon brick and lining technology, which is applied in the field of refractory materials, can solve problems such as pollution, and achieve the effects of reducing pollution, reducing heat loss, and good performance at high temperatures

Inactive Publication Date: 2013-03-06
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the aluminum-magnesium ladle lining material with high carbon content pollutes molten steel and improving the mechanical properties of the aluminum-magnesium ladle lining material, the purpose of the present invention is to provide an aluminum / zinc composite ultra-low carbon magnesium-aluminum alloy for ladle lining Carbon brick, the invention can significantly improve the high temperature strength and thermal shock resistance of the ladle refractory material, improve its oxidation resistance and slag resistance, and the price is moderate, and can realize the alkalinization, low carbonization and long life of the ladle refractory material. Very well meet the needs of clean steel and ultra-low carbon steel smelting

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] With 50% (percentage by weight, the same below) magnesia particles, 10% magnesia-aluminum spinel particles, 34% magnesia fine powder, 4% metal aluminum powder, 1% ultrafine spherical zinc powder, 0.5% Natural flake graphite, 0.5% boron carbide powder antioxidant, plus 3% thermosetting liquid phenolic resin, after mixing, trapping, molding, heat treatment at 200°C, and curing for 30 hours, the ladle lining is made Aluminum / zinc composite ultra-low carbon magnesium aluminum carbon brick.

[0022] Among them: the MgO weight percentage content of magnesia particles is 98%, the particle size is 5-0.088mm, the MgO weight percentage content of magnesia fine powder is 98%, the particle size is less than 0.088mm; the carbon weight percentage content of natural flake graphite The particle size is 97wt%, and the particle size is ≤0.15mm; the particle size of metal zinc powder is less than 0.044mm, and the particle size of metal aluminum powder and boron carbide powder is less than...

Embodiment 2

[0025] 60% magnesia particles, 5% magnesium aluminum spinel particles, 31% magnesia fine powder, 2.9% metal aluminum powder, 0.5% ultrafine spherical zinc powder, 0.5% zirconium boride powder antioxidant , plus 3% thermosetting liquid phenolic resin and 1% solid powdery phenolic resin, after mixing, trapping, molding, heat treatment at 180 ° C, after curing for 36 hours, the aluminum / zinc composite superstructure for ladle lining is obtained Low carbon magnesium aluminum carbon brick.

[0026] Among them: the MgO content of magnesia particles is 98%, the particle size is 5-0.088mm, the MgO content of magnesia fine powder is 98%, and the particle size is less than 0.088mm; the particle size of metal zinc powder is less than 0.044mm, metal aluminum powder and zirconium boride The powder particle size is less than 0.088mm.

[0027] The detection results of the aluminum / zinc composite ultra-low carbon magnesium-aluminum-carbon bricks for ladle lining prepared in this example are ...

Embodiment 3

[0029] 40% magnesia particles, 15% magnesium aluminum spinel particles, 35% magnesia fine powder, 6% metal aluminum powder, 1.5% ultrafine spherical zinc powder, 0.5% natural flake graphite, 2% Calcium boride powder antioxidant, plus 3% thermosetting liquid phenolic resin, after mixing, trapping, molding, heat treatment at 250 ° C, after curing for 16 hours, the aluminum / zinc composite ultra-low Carbon magnesium aluminum carbon brick.

[0030] Among them: the MgO content of magnesia particles is 98%, the particle size is 5-0.088mm, the MgO content of magnesia fine powder is 98%, and the particle size is less than 0.088mm; the carbon content of natural flake graphite is 97wt%, and the particle size is ≤0.15mm; The particle size of metal zinc powder is less than 0.044mm, and the particle size of metal aluminum powder and calcium boride powder is less than 0.088mm.

[0031] The detection results of the aluminum / zinc composite ultra-low carbon magnesium-aluminum-carbon brick for ...

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Abstract

The invention discloses an aluminum / zinc composite ultralow-carbon alumina-magnesite carbon brick for a ladle lining. The aluminum / zinc composite ultralow-carbon alumina-magnesite carbon brick is made by the following steps of: mixing raw materials, aging, molding, carrying out heat treatment at 180-250 DEG C and curing for 16-36 hours. The aluminum / zinc composite ultralow-carbon alumina-magnesite carbon brick comprises the following raw materials in percentage by weight: 40-60% of magnesite granule, 5-15% of magnesia alumina spinel granule, 25-35% of magnesite fine powder, 3-8% of aluminum / zinc metallic composite powder, 0-1% of crystalline flake graphite, 0.5-2% of boracic antioxidant and 3-4% of organic bond. The volume density of the aluminum / zinc composite ultralow-carbon alumina-magnesite carbon brick is greater than or equal to 3.0g / cm<3>, the apparent porosity is not more than 5%, the cold compressive strength is not lower than 45 Mpa, the carbon-embedded high-temperature folding strength at 1400 DEG C is not lower than 25MPa, the content of MgO is not less than 75%, and the carbon content is not more than 2%.

Description

technical field [0001] The invention relates to a refractory material with ultra-low carbon content, in particular to a magnesium-aluminum-carbon unfired brick for ladle lining in the field of steelmaking. Background technique [0002] With the structural adjustment of iron and steel enterprises, high-quality steel has become the leading product of large-scale enterprises, such as: the proportion of high-quality alloy steel, ultra-low carbon steel, clean steel, high-strength steel and other steel types is increasing year by year. The materials (wall cladding and bottom cladding) put forward higher requirements, not only requiring a longer service life, but also requiring less pollution and no pollution of molten steel, and it is best to play a certain role in purification. Studies have shown that basic refractory materials such as magnesia-calcium and magnesia-aluminum are beneficial to reduce phosphorus, sulfur and non-metallic inclusions in molten steel; for high-quality s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66B22D41/02
Inventor 钟香崇马成良任桢葛铁柱
Owner ZHENGZHOU UNIV
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