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Silicon carbide porous ceramic filter and manufacturing method thereof

A technology of silicon carbide ceramic powder and porous ceramics, applied in chemical instruments and methods, filtration separation, separation methods, etc., to achieve high filtration efficiency, small thermal expansion coefficient, and rich pore structure

Inactive Publication Date: 2009-12-23
淄博鑫拓耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: to avoid the shortcomings of the above-mentioned prior art, to provide a gradient pore structure, low sintering temperature, high service temperature; high porosity, low pressure drop, large geometric surface area and tortuous flow path; high strength, long service life, low production cost; easy regeneration, reusable ideal silicon carbide porous ceramic filter

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] a. Preparation of Vitrified Bonding Agent: Accurately weigh 20 kilograms of aluminum hydroxide, 70 kilograms of kaolin, and 10 kilograms of methyl cellulose, put them into a mixer and stir and mix for 0.5-1 hour, mix well, and set aside;

[0061] b. Preparation of water reducer: Accurately weigh 0.2 kg of sodium tripolyphosphate, 9.8 kg of oleic acid, and 90 kg of water into a mixing tank, mix for 0.5-1 hour under stirring, and set aside;

[0062] c. Preparation of main body mud: accurately weigh 85 kg of silicon carbide ceramic powder with a particle size of 200 μm, 10 kg of vitrified binder, and 5 kg of carbon powder, put them into a ball mill, and mix them for 0.5-2 hours, then add reducing 30 kg of water agent, continue ball milling and mixing for 0.5-1 hour, and make the main body body mud, stand-by.

[0063] d. Preparation of transition layer slurry: Accurately weigh 90 kg of silicon carbide ceramic powder with a particle size of 14 μm, 5 kg of ceramic binder, 4.7...

Embodiment 2

[0071] According to the method and steps of embodiment 1, wherein:

[0072] a. The raw material formula of the ceramic bond is: 10 kg of aluminum hydroxide, 65 kg of kaolin, 20 kg of rock wool, and 5 kg of methyl cellulose:

[0073] b. The raw material formula of the water reducer is: 2 kg of sodium tripolyphosphate, 8 kg of oleic acid, and 90 kg of water;

[0074] c. The raw material formula of the main body mud is: 80 kg of silicon carbide ceramic powder with a particle size of 280 μm, 18 kg of ceramic binder, 2 kg of graphite powder, and 40 kg of water reducing agent.

[0075] d. The raw material formula of the transitional coating layer slurry is: 87.5 kg of silicon carbide ceramic powder with a particle size of 10 μm, 10 kg of ceramic binder, 2 kg of carbon powder, 0.5 kg of polyvinyl alcohol, and 50 kg of water;

[0076] e. The raw material formula of the surface coating layer is: 79.7 kg of mullite ceramic powder with a particle size of 5 μm, 15 kg of ceramic binder, 5...

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Abstract

The invention relates to a silicon carbide porous ceramic filter and a manufacturing method thereof, in particular to a filter material for high-temperature liquid or gaseous fluid. The ideal silicon carbide porous ceramic filter has the advantages of gradient pore structure, low sintering temperature, high use temperature, high porosity factor, low pressure drop, large geometric surface area, zigzag flow path, high intensity, long service life, low production cost, easy regeneration and repeated use. Moreover, the filter is formed by compounding and sintering a plurality of layers of ceramic materials of different pore structures, and comprises a main body billet layer, a transition compound film layer and a surface compound film layer. Therefore, the filter is suitable for filtration and purification of various high-temperature and low-temperature fluids such as molten metal, high-temperature flue gas, coking gas and automobile exhaust.

Description

technical field [0001] The invention relates to a silicon carbide porous ceramic filter and its manufacturing method, which relates to a filter material for high-temperature liquid or gaseous fluid, in particular to a silicon carbide porous ceramic filter and its manufacturing method. Background technique [0002] Porous ceramics have high temperature resistance, low density, and good chemical stability, and are widely used in high-temperature fluid filtration devices, catalyst carriers, burners, nozzles, turbine blades and other thermal engine heat-resistant parts. [0003] The stable covalent structure of silicon carbide endows it with many excellent properties such as high melting point, high temperature strength, high hardness, large elastic modulus, wear resistance, small thermal expansion coefficient, and good thermal stability. Suitable for high temperature, high pressure, high corrosion working environment. Therefore, silicon carbide porous ceramics are the preferre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/20
Inventor 张学山
Owner 淄博鑫拓耐火材料有限公司
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