Preparation process of porous ceramic adsorption material high in adhesion rate and easy to desorb

Abstract

The invention discloses a preparation process of a porous ceramic adsorption material high in adhesion rate and easy to desorb, belonging to the field of ceramic materials. According to the invention,a mode of adding pore-forming reserved soft capsules into ceramic slurry is adopted, so on one hand, the ceramic slurry is partially decomposed to generate gas in a ceramic sintering process to obtain the porous ceramic adsorption material with uniform pore diameter, and on the other hand, along with the generation of pores, the pore-forming reserved soft capsules partially go deep into pore walls, and after the decomposition of the soft capsulesis completed, a residual skeleton is dispersed and fixed on the inner walls of the pores in the form of cobweb; compared with an existing porous ceramic material with the same pore diameter and the same porosity, the cobweb type skeleton left by decomposition of the pore-forming reserved soft capsules can improve the adsorption rate of the pores to impurities and enhance the filtration and adsorption effects of the material; and when the material is backwashed, the cobweb type skeleton moves actively in the pores and collides and rubs with theinner walls of the pores continuously, so the impurities on the cobweb-type skeleton and the inner walls of the pores can be backwashed quickly.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a preparation process of a porous ceramic adsorption material with high adhesion rate and easy desorption. Background technique [0002] The porous ceramic material is a kind of porous ceramic material with open pore size and high open porosity, which is made of corundum sand, silicon carbide, cordierite and other high-quality raw materials as the main material, and is prepared by molding and special high-temperature sintering process. High temperature, high pressure, acid, alkali and organic medium corrosion resistance, good biological inertness, controllable pore structure and high opening porosity, long service life, good product regeneration performance, etc., can be applied to precision filtration of various media and separation, high-pressure gas exhaust silencer, gas distribution and electrolytic diaphragm, etc. [0003] There are many ways for porous ceramics to form mic...

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Problems solved by technology

[0007] The porous ceramic material used as a filter material has a narrow pore size distribution range and a high porosity and specific surface area. The filtered material is in full contact with the ceramic material, and the suspended solids, colloids and microorganisms are blocked in the filter. On the surface or inside of the medium, after a period of use, the porous ceramic filter material can be backwashed with gas or liquid to restore the original filtration capacity. However, when cleaning the porous ceramic filter material, due to the complex pore distribution of the material itself, When the gas or liquid reaches the internal pores, the flushing force has been greatly reduced, which makes cleaning the pores inside the material much more difficult than the surface of the material, and it is difficult to clean up

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