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Refractory heat insulation material and preparation method thereof

A technology for refractory thermal insulation and thermal insulation materials, applied in the field of refractory thermal insulation materials, can solve the problems of strong splitting of the material matrix, reducing the strength of thermal insulation materials, easy cracking, etc.

Inactive Publication Date: 2015-12-09
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This thermal insulation material has a good thermal insulation effect, but if clay, refractory cement and phosphate are used at the same time, they will have a negative interaction and reduce the strength of the thermal insulation material. Since vermiculite has a thin sheet structure, it has a strong splitting effect on the material matrix. Easy to crack during repeated heating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Weigh 5 parts by weight of sodium-based bentonite and 32 parts by weight of water in proportion, put them into a mixer, set the speed of the mixer to 400r / min, stir for 20min, form a bentonite slurry, release it, and let it stand for 24 hours before use.

[0040] (2) Weigh 25 parts by weight of closed-cell perlite floating beads, 100 parts by weight of bauxite, 25 parts by weight of kaolin, 7 parts by weight of potassium feldspar and 6 parts by weight of pyrophyllite in a mixer, and set the The rotation speed is 30r / min, the dry powder is stirred for 5 minutes, and then the bentonite slurry is added and stirred for 15 minutes to obtain a uniform material.

[0041] (3) Take out the uniform material obtained in the previous step, and pour it into the mold to make the thermal insulation material forming blank. The forming of the thermal insulation material blank can be formed by machine pressing or manual forming.

[0042] (4) Put the thermal insulation material blank ...

Embodiment example 2

[0050] (1) Weigh 6 parts by weight of sodium-based bentonite and 44 parts by weight of water in proportion, put them into a mixer, set the speed of the mixer to 450r / min, stir for 25 minutes, form a bentonite slurry, release it, and let it stand for 24 hours before use.

[0051] (2) Weigh 45 parts by weight of closed-cell perlite floating beads, 110 parts by weight of bauxite, 45 parts by weight of kaolin, 10 parts by weight of potassium feldspar and 15 parts by weight of pyrophyllite and put them into a mixer, and set the The rotating speed is 35r / min, the dry powder is stirred for 8 minutes, and then the bentonite slurry is added and stirred for 18 minutes to obtain a uniform material.

[0052] (3) Take out the uniform material obtained in the previous step, and pour it into the mold to make the thermal insulation material forming blank. The forming of the thermal insulation material blank can be formed by machine pressing or manual forming.

[0053] (4) Put the thermal insu...

Embodiment example 3

[0061] (1) Weigh 5.5 parts by weight of sodium-based bentonite and 40 parts by weight of water in proportion, put them into a blender, set the speed of the blender to 500r / min, stir for 30 minutes, form a bentonite slurry, release it, and let it stand for 24 hours before use.

[0062] (2) Weigh 30 parts by weight of closed-cell perlite floating beads, 115 parts by weight of bauxite, 35 parts by weight of kaolin, 15 parts by weight of potassium feldspar and 10 parts by weight of pyrophyllite and put them into the mixer, and set the temperature of the mixer. The rotation speed is 40r / min, the dry powder is stirred for 10 minutes, and then the bentonite slurry is added and stirred for 20 minutes to obtain a uniform material.

[0063] (3) Take out the uniform material obtained in the previous step, and pour it into the mold to make the thermal insulation material forming blank. The forming of the thermal insulation material blank can be formed by machine pressing or manual forming....

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Abstract

The invention relates to a refractory heat insulation material and a preparation method thereof. According to raw materials of the refractory heat insulation material, hole-closed perlite floating beads serve as heat insulation aggregate, bauxite, kaolin and pyrophyllite serve as refractory aggregate, potassium feldspar serves as a sintering agent and sodium-based bentonite serves as a forming agent. The preparation method includes the steps of stirring the raw materials, forming a blank through a mould, air-drying the blank, performing demoulding after low-temperature drying, and performing high-temperature ceramization and sintering forming on the blank. By fully utilizing the physicochemical characteristics of all the components, the overall performance of the refractory heat insulation material is optimized, and the prepared refractory heat insulation material has the advantages of being high in refractoriness and strength, small in bulk density, low in heat conductivity coefficient, good in heat insulation effect, environmentally friendly and the like and can be applied to heat insulation of heating furnaces or heat equipment in the machinery industry, the metallurgy industry, the chemical industry and the like and slow down heat energy diffusion to save energy.

Description

technical field [0001] The invention belongs to the field of refractory and thermal insulation materials, and relates to a refractory and thermal insulation material for medium and high temperature industrial heating furnaces and heat insulation layers of thermal equipment, in particular to a refractory and thermal insulation material and a preparation method thereof. Background technique [0002] Refractory and thermal insulation materials are indispensable thermal insulation materials in industrial heating furnaces and thermal equipment. Their function is to slow down the heat loss rate in the process of high temperature work, so as to achieve the purpose of saving energy. Therefore, refractory and thermal insulation materials are widely used in metallurgy, machinery It is widely used in heating furnaces and thermal equipment in manufacturing, chemical and other fields. The thermal insulation principle of refractory thermal insulation materials is mainly to use the low the...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/101
Inventor 黄晋王小路张友寿夏露龙威
Owner HUBEI UNIV OF TECH
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