High refractoriness under load and thermal shock resistant fireproof brick

A thermal shock-resistant and refractory brick technology, applied in the field of refractory materials, can solve the problems of spalling, low temperature, and less thermal shock stability, and achieve the effects of prolonging life, increasing the number of thermal shocks, and increasing the softening temperature under load.

Inactive Publication Date: 2009-05-27
郑州顺兴耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, such products we commonly use are mostly made of high-alumina bauxite clinker and mullite as aggregates, high-alumina bauxite clinker and cordierite as powder materials, and are mixed, mixed, machine-pressed, fired, etc. The disadvantage is that the starting temperature of load softening is low, generally around 1450°C, the number of times of thermal shock stability is small, generally around 40-50 times, and it often occurs due to rapid cooling and rapid heating during use. Peeling phenomenon

Method used

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  • High refractoriness under load and thermal shock resistant fireproof brick

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The high-load soft thermal shock-resistant refractory brick of the present invention is composed of 10% of high-alumina bauxite particles with a particle size of less than 3mm, 10% of fused corundum particles with a particle size of less than 3mm, and synthetic mullite with a particle size of less than 3mm 45% of the granular material is aggregate, add 15% of sillimanite powder with a particle size of 200 mesh, 10% of bonded clay with a particle size of 200 mesh, and add 30% of quartz sand powder with a particle size of less than 200 mesh and spodumene powder with a particle size of less than 200 mesh 10% cordierite powder with particle size less than 200 mesh 40% α-AI with particle size less than 500 mesh 2 o 3 Additive 10% compounded by powder 20% and appropriate amount of water are prepared according to the following method:

[0020] Weigh the above-mentioned high-alumina bauxite, fused corundum, and synthetic mullite granules in proportion and mix them evenly in a ...

Embodiment 2

[0022] The high-load soft thermal shock-resistant refractory brick of the present invention is composed of 15% of high-alumina bauxite particles with a particle size of less than 3mm, 15% of fused corundum particles with a particle size of less than 3mm, and synthetic mullite with a particle size of less than 3mm. 44% of the granular material is aggregate, add 15% of sillimanite powder with a particle size of 200 mesh, 5% of bonded clay with a particle size of 200 mesh, and add 30% of quartz sand powder with a particle size of less than 200 mesh and spodumene powder with a particle size of less than 200 mesh 10% cordierite powder with particle size less than 200 mesh 40% α-AI with particle size less than 500 mesh 2 o 3 6% of additives compounded with 20% powder and appropriate amount of water are prepared according to the following method:

[0023] Weigh the above-mentioned high-alumina bauxite, fused corundum, and synthetic mullite granules in proportion and mix them evenly ...

Embodiment 3

[0025] The high-load soft thermal shock-resistant refractory brick of the present invention is composed of 15% of high-alumina bauxite particles with a particle size of less than 3mm, 15% of fused corundum particles with a particle size of less than 3mm, and synthetic mullite with a particle size of less than 3mm. 35% of the granular material is aggregate, add 15% of sillimanite powder with a particle size of 200 mesh, 10% of bonded clay with a particle size of 200 mesh, and add 30% of quartz sand powder with a particle size of less than 200 mesh and spodumene powder with a particle size of less than 200 mesh 10% cordierite powder with particle size less than 200 mesh 40% α-AI with particle size less than 500 mesh 2 o 3 Additive 10% compounded by powder 20% and appropriate amount of water are prepared according to the following method:

[0026] Weigh the above-mentioned high-alumina bauxite, fused corundum, and synthetic mullite granules in proportion and mix them evenly in a...

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Abstract

The invention discloses a high-refractoriness under load thermal shock-resistant refractory brick, which is prepared from the raw materials of high alumina bauxite, electrically-fused corundum, synthetic mullite, sillimanite, bonding agent, additive and water according to the following mixture ratio by weight portion: 10 to 15 percent of high alumina bauxite granule, 10 to 15 percent of electrically-fused corundum granule, 35 to 45 percent of synthetic mullite granule, 10 to 15 percent of sillimanite powder, 5 to 10 percent of bonding agent, 6 to 10 percent of additive and a proper amount of water; and the brick is prepared by the method comprising the following steps: placing the weighed high alumina bauxite, electrically-fused corundum, synthetic mullite granule into a mixing mill for mixing; after the mixture is mixed uniformly, adding the sillimanite powder, the bonding agent, the additive and the proper amount of water into the mixing mill for mixing for 8 to 12 minutes and obtaining pug of which water content is controlled to be 3 percent; pressing the well mixed pug into green bricks on a brick molding press and placing molded green bodies of which the density is controlled to be 2.808kg / cm<3> into a tunnel kiln for drying; firing the green bricks at 1,460 to 1,480 DEG C and keeping the temperature for 8 to 10 hours; and obtaining finished bricks. The brick has a long service life and can prolong the service life of the kiln.

Description

technical field [0001] The invention relates to a refractory material, in particular to a high-load soft thermal shock-resistant refractory brick used on a ceramic burner of a hot blast stove. Background technique [0002] Refractory materials are subdivided into various types according to their specific scope of use, among which high-load soft heat-shock-resistant bricks are mainly used on ceramic burners of hot blast stoves. At present, such products we commonly use are mostly made of high-alumina bauxite clinker and mullite as aggregates, high-alumina bauxite clinker and cordierite as powder materials, and are mixed, mixed, machine-pressed, fired, etc. The disadvantage is that the starting temperature of load softening is low, generally around 1450°C, the number of times of thermal shock stability is small, generally around 40-50 times, and it often occurs due to rapid cooling and rapid heating during use. Peeling phenomenon. Contents of the invention [0003] The obj...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 樊曾峰樊惠阳高国涛钱伟东
Owner 郑州顺兴耐火材料有限公司
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