Ceramic particle, and filtering element and preparation method thereof

A filter element and ceramic particle technology, which is applied in the direction of dispersed particle filtration, ceramic products, filtration and separation, etc., can solve the problems of reducing thermal stability, increasing thermal expansion coefficient of products, and uneven pore size, so as to increase crack diffusion resistance, Effect of lowering thermal expansion coefficient and improving thermal stability

Active Publication Date: 2020-03-10
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ceramic filter element prepared by this process has irregular shape and poor surface smoothness of the cordierite aggregate synthesized at high temperature. The uniformity of the pore size is poor, the porosity is low, and the air permeability resistance is large; even if the cordierite is crushed into nearly spherical particles, the uniformity of the particle size is improved, but it is still poor, and the surface of the particles is not smooth enough due to the crushing effect, which will also increase filtration. Resistance, not well applied to high temperature gas purification;
[0005] Both of the above two preparation methods, due to the poor shape of the aggregate particles constituting the micropo...

Method used

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  • Ceramic particle, and filtering element and preparation method thereof
  • Ceramic particle, and filtering element and preparation method thereof
  • Ceramic particle, and filtering element and preparation method thereof

Examples

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Embodiment 1

[0043] A kind of ceramic particles, prepared by the following method: kaolin, talc, bauxite, and spodumene are mixed, and the proportion is: 40 parts of kaolin, 35 parts of talc, 15 parts of bauxite, and 3 parts of spodumene. count. The spherical particles whose main crystal phase is cordierite are obtained by ball milling dry powder, rolling molding and firing. The ball milling time is 10 hours, and the ball rolling time is 1 hour. After sieving, spherical particles with a particle size range of 200-250 microns are produced.

[0044] After the particles are sintered at 1280°C, the water absorption rate is 2.5%, and the thermal expansion coefficient is 2.35*10 -6 / °C. Using the spherical particles as aggregates, the prepared ceramic filter element has the advantages of uniform pore size distribution, smooth pores, low filtration resistance, and small thermal expansion coefficient. Compared with ceramic filter elements in the prior art, under the same average pore size, the...

Embodiment 2

[0046] A kind of ceramic particles, prepared by the following steps: kaolin, talc, bauxite, and spodumene are mixed, and the proportion is: 50 parts of kaolin, 45 parts of talc, 25 parts of bauxite, and 8 parts of spodumene. count. The spherical particles whose main crystal phase is cordierite are obtained by ball milling dry powder, rolling molding and firing. The ball milling time is 10 hr, the ball rolling time is 1.5 hr, and the particle size range of the spherical particles obtained through sieving is 300-500 microns.

[0047] After the particles are sintered at 1370°C, the water absorption rate is 4%, and the thermal expansion coefficient is 2.4*10 -6 / °C. Using the spherical particles as aggregates, the ceramic filter element produced has the advantages of uniform pore size distribution, low filtration resistance, small thermal expansion coefficient, etc., and is especially suitable for high-temperature gas purification. Compared with ceramic filter elements in the...

Embodiment 3

[0049] Weigh 45kg of kaolin, 40kg of calcined talc, 20kg of high alumina bauxite, and 6kg of spodumene, put them into a ball mill and mill them for 10 hours, pass through a 200-mesh sieve after ball milling, and obtain powder for subsequent use.

[0050] Put the powder into the rolling ball machine and use the rolling ball process to roll until it becomes a ball. The rolling time is 2 hours, then put it in the drying room or drum dryer for drying, sieving, and finally put it in the high-temperature kiln Firing, the firing temperature is 1380° C., and the holding time is 3 hours, to produce spherical ceramic particles whose main crystal phase is cordierite phase, and the particle size is 800-1000 microns. The spherical particles prepared in this embodiment have a water absorption rate of 3.4%, and a crushing rate of the ball under 50KN is less than 8%.

[0051] Among them, spodumene can form a liquid phase at a lower temperature, which can increase the compactness of spherical ...

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Abstract

The invention discloses a ceramic particle, and a filtering element and a preparation method thereof, wherein the ceramic particle is prepared by the following steps: mixing kaolin, talc, bauxite andspodumene, carrying out dry-method powder preparation, carrying out roll forming, and firing to obtain spherical particles. According to the invention, the spherical particles are uniform in particlesize, smooth in surface and high in compressive strength, and the prepared filtering element is uniform in pore size, low in filtering resistance and capable of improving the filtering performance.

Description

technical field [0001] The invention relates to the field of ceramic filter materials among inorganic non-metallic materials, in particular to a ceramic particle, a filter element and a preparation method of the filter element. Background technique [0002] Ceramic filter materials have the advantages of high temperature resistance and good thermal stability, and can be widely used as hot gas purification materials, catalyst carriers, etc. In particular, the cordierite high-temperature ceramic filter material has the advantages of light weight and small thermal expansion coefficient, and is an excellent hot gas purification material; [0003] The traditional cordierite ceramic filter material is mainly prepared by two methods. One is to use clay and talc as the main raw materials, and by adding a part of cordierite clinker, it is formed by extrusion process and fired at high temperature to make a kind with relatively Small pore size cordierite ceramic filter element; [00...

Claims

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Application Information

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IPC IPC(8): C04B35/195C04B38/06C04B35/64B01D39/20B01D46/30
CPCB01D39/2075B01D46/0001B01D46/30C04B35/195C04B38/009C04B35/64B01D2239/1208B01D2239/1216B01D2239/1275B01D2273/20C04B2235/349C04B2235/3217C04B2235/3472C04B2235/9607C04B2235/77C04B2235/94C04B38/0675
Inventor 薛友祥唐钰栋赵世凯张久美李冰翠李小勇李杰
Owner SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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