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Preparation method of thermal shock resistance filtering material

A technology of ceramic filtration and thermal shock resistance, which is applied in the direction of ceramic products, filtration separation, membrane filter, etc., and can solve the problems of low flexural strength and compressive strength, brittleness, poor thermal shock resistance, etc.

Pending Publication Date: 2019-10-25
魏炎梅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0020] The main technical problem to be solved by the present invention is to provide a preparation method of a thermal shock resistant ceramic filter material for the defects of brittleness, low flexural strength and compressive strength, and poor thermal shock resistance of the common high temperature resistant ceramic filter material at present.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0042] Preparation of ceramic slurry:

[0043] In parts by weight, weigh 20 parts of hydromica, 15 parts of kaolinite, 20 parts of montmorillonite, 10 parts of alumina and 80 parts of polyvinyl alcohol solution with a mass fraction of 10% and 2 parts of emulsifier OP-10 , at a temperature of 45°C and a rotational speed of 800r / min, high-speed stirring and mixing for 3 hours to obtain a ceramic slurry;

[0044] Preparation of homemade porous ceramics:

[0045] Inject the ceramic slurry into the mold, spray and freeze it with liquid nitrogen for 30 seconds, and then thaw it naturally at room temperature for 4 hours. After 3 cycles of freezing and thawing, vacuum freeze-dry at -40°C for 2 hours, and demould to obtain a ceramic blank. Then transfer the ceramic blank to a high-temperature sintering furnace, sinter for 2 hours at a temperature of 1450°C, cool to room temperature with the furnace, and discharge the material to obtain self-made porous ceramics;

[0046] Mold modific...

example 2

[0054] Preparation of ceramic slurry:

[0055] In parts by weight, weigh 25 parts of hydromica, 18 parts of kaolinite, 23 parts of montmorillonite, 11 parts of alumina and 90 parts of polyvinyl alcohol solution with a mass fraction of 10% and 3 parts of emulsifier OP-10 , at a temperature of 50°C and a rotational speed of 850r / min, high-speed stirring and mixing for 4 hours to obtain a ceramic slurry;

[0056] Preparation of homemade porous ceramics:

[0057] Inject the ceramic slurry into the mold, spray and freeze it with liquid nitrogen for 35 seconds, and then thaw it naturally at room temperature for 5 hours. After 4 cycles of freezing and thawing, vacuum freeze-dry at -35°C for 3 hours, and demould to obtain a ceramic blank. Then transfer the ceramic billet into a high-temperature sintering furnace, sinter for 2 hours at a temperature of 1480°C, cool to room temperature with the furnace, and discharge the material to obtain self-made porous ceramics;

[0058] Mold modi...

example 3

[0066] Preparation of ceramic slurry:

[0067] In parts by weight, weigh 30 parts of hydromica, 20 parts of kaolinite, 25 parts of montmorillonite, 12 parts of alumina and 100 parts of polyvinyl alcohol solution with a mass fraction of 10% and 4 parts of emulsifier OP-10 , at a temperature of 55°C and a rotational speed of 900r / min, high-speed stirring and mixing for 5 hours to obtain a ceramic slurry;

[0068] Preparation of homemade porous ceramics:

[0069] Inject the ceramic slurry into the mold, spray and freeze it with liquid nitrogen for 40 seconds, and then thaw it naturally at room temperature for 6 hours. After 5 cycles of freezing and thawing, vacuum freeze-dry at -30°C for 4 hours, and demould to obtain a ceramic blank. Then transfer the ceramic billet into a high-temperature sintering furnace, sinter for 3 hours at a temperature of 1500°C, cool to room temperature with the furnace, and discharge to obtain self-made porous ceramics;

[0070] Mold modification of ...

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Abstract

The invention relates to a preparation method of a thermal shock resistance filtering material, and belongs to the technical field of filtering material preparation. The preparation method of the thermal shock resistance filtering material comprises the steps that pot clay is used as a raw material to be mixed and stirred with a polyvinyl alcohol solution and a foaming agent to obtain a sizing agent, the sizing agent is subjected to freezing and thawing processing after being injected into a mold; then vacuum drying is carried out, and calcination is carried out to obtain porous ceramics; thenmildewing processing is carried out after the porous ceramics is mixed with trichoderma and wood dust; and then a mold material is filtered after high-speed stirring, obtained filter residue and a sodium silicate solution are mixed, ultrasonic reaction is carried out under the action of hydrochloric acid, discharging and calcination are carried out after the reaction is completed, and finally, the thermal shock resistance filtering material is prepared. The thermal shock resistance filtering material has good thermal shock resistance, high crush resistance and breaking strength, good filtering effect and wide application prospects.

Description

technical field [0001] The invention relates to a method for preparing a thermal shock-resistant ceramic filter material, which belongs to the technical field of filter material preparation. Background technique [0002] High-temperature ceramic filtration technology is an advanced hot gas purification technology developed in the 1980s. It has great application prospects in many industries, such as the purification of high-temperature smoke and dust in the metallurgical industry, chemical and ceramic industries, and the purification of high-temperature gases in the chemical industry. Purification and recovery of high-temperature catalysts, purification of medium-heat gases in the thermal power industry, etc. High-temperature ceramic filter material is the key to the entire high-temperature ceramic filter technology. The high-temperature resistance, high-pressure performance, acid and alkali corrosion resistance, thermal stability, filtration performance, cleaning and regener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B33/13C04B38/10B01D39/20
CPCB01D39/2068B01D2239/10C04B33/1305C04B33/131C04B38/10C04B2235/3217C04B2235/3427C04B2235/3463C04B2235/96C04B38/0074
Inventor 魏炎梅
Owner 魏炎梅
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