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Fireproof material, preparation method thereof and fireproof brick

A technology of refractory materials and granular materials, which is applied in the field of refractory materials, its preparation, and refractory bricks, can solve the problems of unsatisfactory creep resistance, unsuitable for industrial production, and high cost of mullite bricks, and achieve remarkable energy saving effects. The effect of saving maintenance cost, reducing material consumption and energy consumption

Active Publication Date: 2015-02-18
HUNAN XIANGGANG RUITAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the existence of a large amount of impurities in low-creep high-alumina bricks and high-alumina bricks added with "three stones" will generate a large amount of liquid phase at high temperature, which seriously affects product performance; mullite bricks are expensive and not suitable for industrialization Production
The andalusite brick has been developed in the last ten years and has good thermal shock stability, but the creep resistance is not ideal

Method used

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  • Fireproof material, preparation method thereof and fireproof brick
  • Fireproof material, preparation method thereof and fireproof brick
  • Fireproof material, preparation method thereof and fireproof brick

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preparation example Construction

[0042] The preparation raw material of the refractory material provided by the present invention includes andalusite, and the mass fraction of the andalusite in the preparation raw material is 48-62%, preferably 50-60%, more preferably 52-58%. In the present invention, the andalusite preferably includes a first andalusite granular material and a second andalusite granular material, and the particle size of the first andalusite granular material is preferably 3-1 mm, more preferably 2.5-1 mm. In the present invention, the particles with a wide particle size range are divided into several grades with a narrow particle size range. These grades are called particle grades. The particle size is 3mm, and the minimum particle size is 1mm; the particle size of the second andalusite granular material is preferably 1-0mm, more preferably 1-0.088mm; the first andalusite granular material and the second andalusite granular material The mass ratio of the materials is preferably (3-5):1, mor...

Embodiment 1

[0083] 13% sillimanite with a particle size of 0.2-0mm, 13.8% sillimanite with a particle size of 0.074-0mm, 5% calcined α-alumina, 7% tabular alumina and 3.5% Vero mud The premixing equipment is used for premixing, and the premixing time is 25 minutes. After premixing, the mixed materials are fully mixed and evenly mixed, and the premix is ​​made after premixing;

[0084] 1.5% microsilica powder, 1.0% pulp powder, 0.2% sodium tripolyphosphate and 1.5% water are pre-milled together in a ball mill for 2 hours to make a slurry, and the grinding medium in the ball mill is sea pebbles;

[0085] After adding 44% andalusite particles with a particle size of 3-1mm and 11% andalusite particles with a particle size of 1-0mm into the forced sand mixer, first dry mix for 2 minutes, then add mud and wet mix for 2 minutes, and finally add Obtained premix, after net mixing for 20 minutes, obtains refractory material;

[0086] The obtained refractory material is pressed into adobe by a fric...

Embodiment 2

[0102] Put 13% sillimanite with a particle size of 0.2-0mm, 15.8% sillimanite with a particle size of 0.074-0mm, 5% activated α-alumina, 7% white corundum and 3.5% Vero mud into the pre- The mixing equipment is used for premixing, and the premixing time is 25 minutes. After premixing, the mixed materials are fully mixed and evenly mixed, and a premix is ​​made after premixing;

[0103] 1.5% microsilica powder, 1.0% pulp powder, 0.2% sodium tripolyphosphate and 1.5% water are pre-milled together in a ball mill for 2 hours to make a slurry, and the grinding medium in the ball mill is sea pebbles;

[0104] After adding 42% andalusite particles with a particle size of 3-1mm and 11% andalusite particles with a particle size of 1-0mm into the forced sand mixer, first dry mix for 3 minutes, then add mud for wet mixing for 3 minutes, and finally add Obtained premix, after net mixing for 15 minutes, obtains refractory material;

[0105] The obtained refractory material is pressed into...

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Abstract

The invention provides a fireproof material. The fireproof material is prepared from the following components in percentage by mass: 48-62 percent of andalusite, 20-35 percent of sillimanite, 4-8 percent of aluminum oxide, 5-15 percent of corundum, 2-6 percent of combined clay, 1-3 percent of silica powder, 0.5-1.5 percent of paper pulp powder and 0.1-0.3 percent of a water reducing agent. In the fireproof material prepared from the high-purity andalusite and sillimanite, the high-purity corundum and the high-purity aluminum oxide are also added for strengthening a base material so that a main crystal phase mullite in the base material is columnar, long column-shaped or needle-shaped and a special network structure is formed; meanwhile, the needle-column-shaped mullite in the base material forms an interlaced network structure with the andalusite and the sillimanite, so the fireproof material disclosed by the invention is extremely good in thermal shock resistance and stability, relatively high in refractoriness under load (higher than 1700 DEG C) and relatively low in creep rate (0.125%). The invention also provides a preparation method of the fireproof material and a fireproof brick.

Description

technical field [0001] The invention belongs to the field of iron and steel smelting, and in particular relates to a refractory material, a preparation method thereof and a refractory brick. Background technique [0002] With the rapid development of my country's national economy, the demand for steel materials is increasing. The rapid growth of steel production in recent years is mainly due to the large-scale development of blast furnaces. The development of blast furnaces has also promoted the rapid development of the most important auxiliary thermal equipment of blast furnaces - hot blast stoves. Hot blast stoves are used as a regenerative heat exchange The device plays a very important role in achieving high production, low consumption and reducing the cost of pig iron in the blast furnace. [0003] In the past two decades, hot blast stoves have gradually developed in the direction of large size, high wind temperature and long life. The blast furnace is enlarged, and t...

Claims

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Application Information

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IPC IPC(8): C04B35/66
CPCC04B35/66
Inventor 朱新军章兴高曾立民刘利华
Owner HUNAN XIANGGANG RUITAI TECH
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