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A kind of winding preparation method of high porosity porous ceramic tube

A porous ceramic, high porosity technology, applied in ceramic products, ceramic molding machines, manufacturing tools, etc., can solve the problems of large compression deformation, low strength, application limitations, etc., and achieve the effect of low filtration pressure drop and high porosity

Active Publication Date: 2019-08-16
江苏省陶瓷研究所有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its existing problems are also obvious. On the one hand, its strength is low, and it has a large compression deformation, which requires additional support during use. On the other hand, its ability to resist the erosion of solid particles is weak, and it is not suitable for high flux for a long time. use, its application is very limited

Method used

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  • A kind of winding preparation method of high porosity porous ceramic tube

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation method of the described high-porosity porous ceramic tube comprises the following steps:

[0021] a. Preparation of suspension: put 85 parts of deionized water into the mixer, start stirring, weigh 0.3 parts of ammonium polyacrylate, 2 parts of aluminum silicate polycrystalline fiber with fiber length ≥ 40 mm, and 3 parts of 10% PVA solution, 10 parts of silica sol, and added in order at intervals of 1.0min, mixed evenly to make a slurry suspension;

[0022] b. Fibrous film forming: pass the first water-based slurry evenly through a 30-mesh stainless steel screen, so that the aluminum silicate polycrystalline fiber is evenly spread on the surface of the screen, forming a two-dimensionally stretched aluminum silicate polycrystalline fiber film. Remove the film from the sieve, place it on a flat plate, and flatten it with a winding drum to obtain a film with a thickness of 2.3mm, and dry it at room temperature at 50°C for 5 hours;

[0023] c. Preparation ...

Embodiment 2

[0028] The preparation method of the described high-porosity porous ceramic tube comprises the following steps:

[0029] a. Preparation of suspension: put 80 parts of deionized water into the mixer, start stirring, weigh 0.4 parts of ammonium polyacrylate, 0.5 parts of aluminum silicate polycrystalline fiber with fiber length ≥ 20 mm, and 4 parts of 10% PVA solution, 15 parts of aluminum sol, and added sequentially at intervals of 1.0 min, mixed evenly to make a slurry suspension;

[0030] b. Fibrous film formation: pass the first water-based slurry evenly through a 40-mesh stainless steel screen, so that the aluminum silicate polycrystalline fiber is evenly spread on the surface of the screen to form a two-dimensionally stretched aluminum silicate polycrystalline fiber film. Remove the film from the sieve, place it on a flat plate and flatten it with a winding drum to obtain a film with a thickness of 0.7mm, and dry it at room temperature at 60°C for 1 hour;

[0031] c. Prep...

Embodiment 3

[0036] The preparation method of the described high-porosity porous ceramic tube comprises the following steps:

[0037] a. Preparation of the suspension: Put 78 parts of deionized water into the mixer, start stirring, weigh 0.4 parts of ammonium polyacrylate, 1.5 parts of aluminum silicate polycrystalline fiber with a fiber length ≥ 30 mm, and 2 parts of 10% PVA solution. 18 parts of aluminum sol, and added sequentially at intervals of 1.0min, mixed evenly to make a slurry suspension

[0038]b. Fibrous film formation: pass the first water-based slurry evenly through a 30-mesh stainless steel screen, so that the aluminum silicate polycrystalline fiber is evenly spread on the surface of the screen, forming an aluminum silicate polycrystalline fiber film stretched in the two-dimensional direction. Remove the film from the sieve, place it on a flat plate, and flatten it with a winding drum to obtain a film with a thickness of 1.5mm, and dry it at room temperature at 60°C for 2 ho...

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Abstract

The invention relates to a winding preparation method of a high-porosity porous ceramic pipe. The winding preparation method comprises: adding aluminum silicate polycrystalline fiber, a binder and the like into water to prepare a slurry, and preparing a paper-like fiber film having fibers extending in a two-dimensional direction by using a papermaking molding method; uniformly coating the slurry prepared from the chopped aluminum silicate polycrystalline fiber, the aluminum silicate ceramic fine powder and the binder on the surface of the fiber film; winding under a certain external force to form a pipe billet having a predetermined size and a predetermined bulk density; and finally carrying out low temperature drying and high temperature firing to prepare the porous ceramic pipe. According to the present invention, the porous ceramic pipe has high porosity, and has low filtration pressure drop during solid-liquid separation or solid-gas separation; and the ordered arrangement of the fibers and the granular crystal is achieved by using the multi-layer winding method, and the fibers and the crystal are connected to form the grid structure through the firing, such that the material has the high porosity and the low filtration pressure drop, and further has good mechanical property and good economy.

Description

technical field [0001] The invention relates to a winding preparation method of a high-porosity porous ceramic tube, which is mainly used for the preparation of ceramic membrane products for solid-liquid and solid-gas separation. Background technique [0002] Due to the corrosion resistance and high temperature resistance of ceramic materials, porous ceramic membrane tubes are widely used in some environments with harsh working conditions, mainly for solid-liquid separation or solid-gas separation. Traditional porous ceramic membranes are made of ceramic powders such as silicon carbide, silicon nitride, mullite, and cordierite. Relatively low (generally ≤40%), the resistance of fluid passing is high, not suitable for applications under low pressure or high flux. [0003] In order to reduce the filtration pressure drop, a new class of ceramic membrane tubes has been invented. It is made of ceramic fiber, formed by pressing, weaving or suction filtration, and fired at high t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/80C04B35/18B28B19/00B28B21/48C04B38/00
CPCB28B19/0092B28B21/48C04B35/18C04B35/803C04B38/00C04B2235/608C04B2235/612C04B2235/94C04B2235/96C04B38/0067C04B38/0074
Inventor 徐泽跃沈云进陆丽芳朱军伦文山许小静
Owner 江苏省陶瓷研究所有限公司
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