Metallic composite low carbon magnesium carbon brick for ladle slag wire and manufacture method thereof

A metal composite, ladle slag wire technology, applied in the field of molded products, can solve the problems of polluted molten steel and other problems, and achieve the effects of prolonging life, obvious thermal shock resistance and less carbon increase

Inactive Publication Date: 2008-08-20
ZHENGZHOU UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a metal-composite low-carbon magnesia-carbon brick for ladle slag line and its preparation method in view of the high-carbon content of the material polluting molten steel and the problems in the above-mentioned improvement process. Reduce the carbon content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take 51% magnesia particles, 35% magnesia fine powder, 3.5% natural flake graphite, 6% metal aluminum powder, 4% magnesium aluminum alloy powder, 0.5% boron carbide powder, 4% thermosetting liquid A total of 500Kg of phenolic resin and 1% solid powdered phenolic resin are used as raw materials. Then the metal composite low-carbon magnesia-carbon brick for the ladle slag line is obtained through the following steps:

[0031] 1. Mixing: (1) First weigh 35% magnesia fine powder, 6% metal aluminum powder, 4% magnesium aluminum alloy powder, 0.5% boron carbide powder and 1% solid powdery phenolic resin Pre-mixed evenly, stand-by; (2) then add large, medium and small three particle size gradations totaling 51% magnesia particles in the wheel mill mixer and dry mix for 2 minutes; (3) add 4% thermosetting liquid For phenolic resin, add 3.5% natural flake graphite after mixing for 4 minutes, and mix for another 4 minutes; (4) finally add the pre-mixed fine powder in (1), mix fo...

Embodiment 2

[0038] Take 65% magnesia particles, 25% magnesia fine powder, 3% natural flake graphite, 4.5% metal aluminum powder, 2% silicon powder, 0.5% zirconium boride powder, 4.5% thermosetting liquid phenolic A total of 500Kg of resin and 1% solid powdered phenolic resin are used as raw materials. Then the metal composite low-carbon magnesia-carbon brick for the ladle slag line is obtained through the following steps:

[0039]1. Mixing: (1) first weigh 25% magnesia fine powder, 4.5% metal aluminum powder, 2% silicon powder, 0.5% zirconium boride powder and 1% solid powdery phenolic resin Mix evenly, stand-by; (2) then add large, medium and small magnesia particles with a total size of 65% in the wheel mill mixer and dry mix for 1 minute; (3) add 4.5% thermosetting liquid phenolic aldehyde Resin, after mixing for 2 minutes, add 3% natural flake graphite, and mix for another 2 minutes; (4) finally add the pre-mixed fine powder in (1), mix for 25 minutes and then discharge.

[0040] 2....

Embodiment 3

[0046] Take 58% magnesia particles, 30% magnesia fine powder, 4% natural flake graphite, 6% metal aluminum powder, 1% metal zinc powder, 1% calcium boride powder, 3% thermosetting liquid A total of 500Kg of phenolic resin and 1% solid powdered phenolic resin are used as raw materials. Then the metal composite low-carbon magnesia-carbon brick for the ladle slag line is obtained through the following steps:

[0047] 1. Mixing: (1) First weigh 30% magnesia fine powder, 6% metal aluminum powder, 1% metal zinc powder, 1% calcium boride powder and 1% solid powdery phenolic resin Pre-mixed evenly, stand-by; (2) then add large, medium and small magnesia particles with a total size of 58% in the wheel mill mixer and dry mix for 3 minutes; (3) add 3% thermosetting liquid For phenolic resin, add 4% natural flake graphite after mixing for 5 minutes, and mix for another 5 minutes; (4) finally add the pre-mixed fine powder in (1), mix for 35 minutes and discharge.

[0048] 2. Stuck materi...

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Abstract

The invention discloses a metal complex low-carbon magnesia carbon brick used for ladle slag lines, the weight percentage of the added materials is as following, 50 to 70 percent of magnesia particles, 25 to 35 percent of magnesia powder, and 3 to 6 percent of organic binder, furthermore, the following components are added which are produced by mixing, striating materials, forming and heat-treatment, 0 to 4 percent of flake graphite, 3 to 15 percent of metal powder, and 0.5 to 3 percent of antioxidant containing boron. The antioxidant properties, slag-resistance performance, high temperature strength and the thermal shock resistance of the ladle slag line used metal complex low-carbon magnesia carbon brick are greatly improved, the service life is prolonged, the consumption cost of each ton of refractories is lowered. The preparation method of ladle slag line used metal complex low-carbon magnesia carbon bricks is also disclosed, and the carbon content in the ladle slag line used metal complex low-carbon magnesia carbon bricks produced by the method is less than or equal to 6 percent, little carbon is added so as to reduce the pollution towards liquid steel, and residual strength ratio of the thermal shock resistance is kept at 70 to 80 percent.

Description

1. Technical field [0001] The invention relates to a shaped product characterized by low-carbon components, in particular to a magnesia-carbon brick for a ladle slag line in the field of steelmaking. 2. Background technology [0002] Entering the 21st century, the structure of iron and steel enterprises has been adjusted, and 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, etc. It is required to strictly control the carbon content in the refractory material to reduce the carbon increase of the molten steel, and the increase and decrease of the molten steel temperature in the secondary refining should be small, and the thermal conductivity of the ladle lining should be low, which leads to the use conditions of the ladle. It is more harsh and the working environment is more severe. There is an urgent need for the emergence of low-carbon m...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/043
Inventor 钟香崇马成良曹勇叶方保郭嘉林王京京邵雷
Owner ZHENGZHOU UNIV
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