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Refractory brick and preparation method thereof

A technology of refractory bricks and fused spinel is applied in the field of iron and steel smelting, which can solve the problems of environmental protection and strength, and achieve the effects of good thermal shock resistance, firm skeleton structure, and improvement of medium temperature strength and normal temperature strength.

Active Publication Date: 2016-01-27
SHOUGANG JINGTANG IRON & STEEL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention solves the technical problem that the refractory bricks in the prior art cannot have both environmental protection and strength by providing a refractory brick and a preparation method of the refractory brick

Method used

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  • Refractory brick and preparation method thereof
  • Refractory brick and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0042] In this embodiment, a kind of refractory brick is provided, and the components included in the refractory brick and the weight percentage of the components are:

[0043] Fused magnesia sand 50-60%, fused magnesia powder 0-15%, fused spinel particles 0-20%, fused spinel powder 0-20%, fused spinel micropowder 0-9% and compound admixture 1-6%;

[0044] Wherein, the refractory brick is prepared by pressing the components and then drying at high temperature; through the combination of the fused spinel powder and the sintering activity of the components during high-temperature use, self-sintering inside the adobe occurs , to produce secondary spinel, thereby avoiding the volume expansion caused by the electric melting method or sintering method, and improving the medium temperature strength and normal temperature strength of the refractory brick;

[0045] Wherein, the fused magnesia sand particles and the fused spinel particles are both particle size materials, which increas...

Embodiment 2

[0056] In this embodiment, a method for preparing a refractory brick is provided, the method comprising:

[0057] Weigh by weight percentage:

[0058] Fused magnesia sand 50-60%, fused magnesia powder 0-15%, fused spinel particles 0-20%, fused spinel powder 0-20%, fused spinel micropowder 0-9% , Composite admixture 1-6% and phenolic resin 2-6%;

[0059] dry the aggregates of the fused magnesia sand, the fused magnesia powder, the fused spinel particles, the fused spinel powder, and the fused spinel fine powder with a particle size larger than the first particle size Mix for the first time, then add the phenolic resin, and wet mix for the second time to form the first mixture;

[0060] The fused magnesia sand particles, the fused magnesia sand powder, the fused spinel particles, the fused spinel powder and the fused spinel fine powder have a particle size smaller than or equal to the first particle size The powder and the compound additive are added to the first mixture, mix...

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Abstract

The invention discloses a refractory brick and a preparation method thereof. The refractory brick is prepared from, by weight, 50-60% of fused magnesia particles, 0-15% of fused magnesia powder, 0-20% of fused spinel particles, 0-20% of fused spinel powder, 0-9% of fused spinel micro powder and 1-6% of compound admixtures; secondary spinel is generated through the amphigama of the fused spinel micro powder and sintering activity in the high-temperature use process, volume expansion caused by an electric smelting method or a sintering method is avoided, and the medium-temperature strength and normal-temperature strength are improved; the critical grain size of the components is increased, a firm framework structure is provided for the refractory brick, and high-temperature strength is improved; the refractory brick and the preparation method thereof are used for solving the technical problem that in the prior art, an refractory brick cannot integrate environmental protection and strength; the refractory brick is environmentally friendly and high in strength.

Description

technical field [0001] The invention relates to the technical field of iron and steel smelting, in particular to a refractory brick and a method for preparing the refractory brick. Background technique [0002] The vacuum smelting furnace has the characteristics of strong refining function, large processing capacity, short processing cycle, and high cleanliness of molten steel after treatment. It has been widely used in steel mills all over the world. Conditions were dire. Especially the dipping pipe and the lower tank, not only the inner wall is washed by high-speed airflow and molten steel, but also the outer wall is eroded by molten slag and rapidly cooled and rapidly heated, so the material is required to have excellent corrosion resistance to molten steel and slag, and good At the same time, the material is also required to have sufficient thermal shock stability. Magnesium-chromium products fired at ultra-high temperature, because of their excellent performance in al...

Claims

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Application Information

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IPC IPC(8): C04B35/66
Inventor 张启东钟凯王崇崔园园彭国仲祝少军李勇曹勇卢家凯沙远洋
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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