High wear-resistant silica molybdenum brick and its preparation method

A kind of silicon mulberry brick, high wear resistance technology, applied in the field of refractory materials, can solve the problem that the service life is only in the interval of half a year to one year, the fire resistance, wear resistance, corrosion resistance and thermal shock resistance are average, and the ability to resist the erosion of cement clinker. Weakness and other problems, to achieve the effect of compact structure, improved thermal shock resistance, high load soft temperature

Active Publication Date: 2016-01-20
JIANGSU SHUNXING REFRACTORY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of magnesia-aluminum spinel bricks are that they have weak resistance to cement clinker erosion, poor kiln skin hanging performance, and high thermal conductivity, which causes the surface temperature of the kiln body to increase, and forced cooling by blast is required to protect the kiln body and maintain Production
Ordinary silica-molybricks are made of ordinary bauxite raw materials and silicon carbide in the process of pressing and drying refractory bricks. The bonding strength is not enough, and the lack of firing temperature leads to incomplete development of mullite crystals, resulting in weak high-temperature performance, fire-resistant, wear-resistant and Corrosion and thermal shock resistance are relatively general
Generally, the service life of silica bricks is only in the range of half a year to one year.

Method used

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  • High wear-resistant silica molybdenum brick and its preparation method
  • High wear-resistant silica molybdenum brick and its preparation method
  • High wear-resistant silica molybdenum brick and its preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A high wear-resistant silica brick prepared from the following components in weight percentage:

[0030]

[0031]

[0032] Wherein, the high alumina bauxite is Al 2 o 3 Special grade high bauxite with a weight percentage of 89%; bauxite is Al 2 o 3 Special-grade alumina with a weight percentage of 86%; the main component of silicon carbide, SiC, has a content of 98%, a bulk density of 3.215g / cm3, and a particle size of ≤3mm; α-Al 2 o 3 The main component of micropowder is Al 2 o 3 The content of silicon dioxide is 99.0%, the bulk density is 3.99g / cm3, and the particle size is 2 content of 97%, specific surface area of ​​16m 2 / g, particle size <1μm, pH value 5.6.

[0033] The preparation method of high wear-resistant silica molybdenum brick comprises the following steps:

[0034] The first step, making mud: Weigh the above components according to the proportion, add pulp waste liquid with a total component weight of 6.0%, and mix and grind in a planetary m...

Embodiment 2

[0041] A high wear-resistant silica brick prepared from the following components in weight percentage:

[0042]

[0043]

[0044] Wherein, the high alumina bauxite is Al 2 o 3 Special grade high bauxite with 90% by weight; bauxite is Al 2 o 3 Special grade bauxite with a weight percentage of 87%; the main component of silicon carbide, SiC, with a content of 98%, a bulk density of 3.215g / cm3, and a particle size of ≤3mm; α-Al 2 o 3 The main component of micropowder is Al 2 o 3 The content of silicon dioxide is 99.3%, the bulk density is 3.98g / cm3, and the particle size is 2 content of 97%, specific surface area of ​​18m 2 / g, particle size <1μm, pH 6.3.

[0045] The preparation method of high wear-resistant silica molybdenum brick comprises the following steps:

[0046] The first step, making mud: weigh the above components according to the proportion, add pulp waste liquid with a total component weight of 5.0%, and mix and grind in a planetary mixer to make mud; ...

Embodiment 3

[0052] A high wear-resistant silica brick prepared from the following components in weight percentage:

[0053]

[0054] Wherein, the high alumina bauxite is Al 2 o 3 Special grade high bauxite with 92% by weight; bauxite is Al 2 o 3 Special-grade alumina with a weight percentage of 86%; the main component of silicon carbide, SiC, has a content of 98%, a bulk density of 3.215g / cm3, and a particle size of ≤3mm; α-Al 2 o 3 The main component of micropowder is Al 2 o 3 The content of silicon powder is 99.5%, the bulk density is 3.99g / cm3, and the particle size is less than 5μm; the main component of silicon micropowder is SiO 2 content of 97%, specific surface area of ​​26m 2 / g, particle size <1μm, pH value 7.5.

[0055] The preparation method of high wear-resistant silica molybdenum brick comprises the following steps:

[0056] The first step, making mud: weigh the above components according to the proportion, add pulp waste liquid with a total component weight of 4...

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Abstract

The invention discloses a high-wear-resistance Guimo brick and a preparation method thereof, belonging to the field of refractory materials. The high-wear-resistance Guimo brick is prepared from the following components in percentage by weight: 20-30% of bauxite with the particle size of smaller than 0.1mm, 5-15% of bauxite with the particle size of greater than or equal to 0.1mm and smaller than 1mm, 30-40% of bauxite with the particle size of greater than or equal to 1mm and smaller than 3mm, 5-8% of bauxite with the particle size of greater than or equal to 3mm, 15-20% of silicon carbide, 2-4% of alpha-Al2O3 micropowder, 3-4% of silicon micropowder and 3-5% of nano metal aluminum powder. The preparation method comprises the following steps: slurry making, forming, drying and firing. The high-wear-resistance Guimo brick has the advantages of balanced particle size proportion, compact structure, high bonding strength and firing strength, excellent wear resistance, favorable thermal shock resistance, low heat conductivity, high refractoriness under load and long service life.

Description

technical field [0001] The invention belongs to the field of refractory materials, and relates to a high-wear-resistant silica molybdenum brick and a preparation method thereof, in particular to a high-wear-resistant silica molybdenum brick and a high-wear-resistant silica molybdenum brick used in the decomposition zone and transition zone of a large-scale dry-process cement rotary kiln. Preparation. Background technique [0002] Magnesium-aluminum spinel bricks or ordinary silica molybdenum bricks are used in the decomposition zone and transition zone of the existing large-scale dry-process cement rotary kiln. The disadvantages of magnesia-aluminum spinel bricks are that they have weak resistance to cement clinker erosion, poor kiln skin hanging performance, and high thermal conductivity, which causes the surface temperature of the kiln body to increase, and forced cooling by blast is required to protect the kiln body and maintain Production. Ordinary silica-molybricks ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 吴俊亮沈驰钱利峰陈志福
Owner JIANGSU SHUNXING REFRACTORY TECH
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