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Corundum micro-pore heat-insulating and fireproof material and preparation method thereof

A refractory material and corundum-based technology, which is applied in the field of corundum-based microporous heat-insulating refractory materials and its preparation, can solve the problems of high labor intensity, high energy consumption, and poor volume stability of the furnace lining, and achieve low labor intensity and low energy consumption. Low, improve the effect of erosion resistance and penetration ability

Inactive Publication Date: 2014-01-15
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the prepared composite brick has high refractoriness, high strength and good thermal insulation performance, the composite brick needs to be formed by machine pressing, which has high energy consumption, and when the composite brick is built, artificial The labor intensity is high, there are brick joints between the bricks, and the volume stability of the furnace lining is poor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A corundum-based microporous heat-insulating refractory material and a preparation method thereof. The raw materials and contents of the corundum-based microporous heat-insulating refractory material are: 40-45wt% corundum particles, 40-45wt% corundum fine powder, 8-10wt% active α-alumina powder, 7-10wt% The ρ-alumina micropowder; the admixture and its content are: 0.1-0.5wt% sodium tripolyphosphate of the above-mentioned raw materials, 0.1-0.5wt% of the above-mentioned raw materials of nano-alumina powder, and 5-10wt% of the above-mentioned raw materials of water.

[0016] The preparation method of this example is: firstly mix the ingredients according to the content of raw materials and admixtures, then mix the raw materials and dispersant to make a mixture, and disperse the nano-alumina powder in water, and disperse it under the condition of ultrasonic vibration for 1 ~5 minutes to prepare a uniform suspension; then add the suspension to the mixture drop by drop, sti...

Embodiment 2

[0020] A corundum-based microporous heat-insulating refractory material and a preparation method thereof. The raw materials and contents of the corundum microporous heat-insulating refractory material are: 45~50wt% corundum particles, 40~45wt% corundum fine powder, 5~8wt% active α-alumina powder, 5~7wt% The ρ-alumina micropowder; the admixture and its content are: 0.1-0.5wt% sodium hexametaphosphate of the above-mentioned raw materials, 0.5-1.0wt% of the above-mentioned raw materials of nano-alumina powder, and 5-10wt% of the above-mentioned raw materials of water.

[0021]The preparation method of this example is: firstly mix the ingredients according to the content of raw materials and admixtures, then mix the raw materials and dispersant to make a mixture, and disperse the nano-alumina powder in water, and disperse it under the condition of ultrasonic vibration for 1 ~5 minutes to prepare a uniform suspension; then add the suspension to the mixture drop by drop, stir evenly...

Embodiment 3

[0025] A corundum-based microporous heat-insulating refractory material and a preparation method thereof. The raw materials and contents of the corundum-based microporous heat-insulating refractory material are: 40-45wt% corundum particles, 40-45wt% corundum fine powder, 8-10wt% active α-alumina fine powder, 5-7wt% The ρ-alumina micropowder; the admixture and its content are: 0.1-0.5wt% polyethylene glycol of the above-mentioned raw materials, 1.0-1.5wt% of the above-mentioned raw materials of nano-alumina powder, and 5-10wt% of the above-mentioned raw materials of water.

[0026] The preparation method of this example is: firstly mix the ingredients according to the content of raw materials and admixtures, then mix the raw materials and dispersant to make a mixture, and disperse the nano-alumina powder in water, and disperse it under the condition of ultrasonic vibration for 1 ~5 minutes to prepare a uniform suspension; then add the suspension to the mixture drop by drop, sti...

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PUM

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Abstract

The invention relates to a corundum micro-pore heat-insulating and fireproof material and a preparation method thereof. The contents of raw materials of the corundum micro-pore heat-insulating and fireproof material are as follows: 40-50 wt% of corundum grain, 40-45 wt% of corundum fine powder, 5-10 wt% of active a-aluminum oxide micro-powder and 5-10 wt% r-aluminum oxide micro-powder, an additive, a dispersant account for 0.1-0.5 wt% of the above raw materials, nano aluminum oxide powder accounting for 0.1-1.5 wt% of the above materials and water accounting for 5-10 wt% of the above materials. The preparation method comprises the following steps of: dispersing the nano aluminum oxide powder into the water and dispersing under an ultrasonic vibration condition for 1-5 minutes to prepare a uniform suspension solution; then, gradually dropwise adding the suspension solution into a mixed material, and vibrating and molding; maintaining at a room temperature for 24-48 hours; de-molding and carrying out heat treatment at 1400-1600 DEG C; and keeping the heat for 1-5 hours. The corundum micro-pore heat-insulating and fireproof material and the preparation method thereof have the advantages of simple preparation process and lower energy consumption; a product has the advantages of small average hole diameter, high fireproof degree, great high-temperature resistance, low thermal conductivity and strong anti-corrosion resistance; and the product can be directly applied to a working layer of thermal equipment.

Description

technical field [0001] The invention belongs to the technical field of thermal insulation refractory materials. In particular, it relates to a corundum microporous heat-insulating refractory material and a preparation method thereof. Background technique [0002] With the country's increasing requirements for energy saving and consumption reduction, the research and development of thermal insulation refractory materials has developed rapidly. Traditional thermal insulation refractory materials such as lightweight corundum bricks, diatomite bricks and anorthite lightweight bricks usually reduce the thermal conductivity of the material by increasing the porosity. The higher the porosity of the material, the lower its mechanical strength. In addition, traditional heat-insulating refractory materials are usually shaped products, which require machine press molding, high energy consumption, and manual masonry during use, which is labor-intensive. Or other parts in direct contac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/101C04B35/622C04B38/00
Inventor 朱伯铨魏国平李享成
Owner WUHAN UNIV OF SCI & TECH
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