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Preparation method of porous silicon carbide flat plate ceramic support

A technology of porous silicon carbide and support body is applied in the field of inorganic membrane separation materials and inorganic porous materials, and can solve the problems of expensive sintering furnace, high sintering temperature and complicated sintering process.

Inactive Publication Date: 2018-10-16
台州利欧环保新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] A problem to be solved by the present invention is: the existing porous silicon carbide ceramics adopts the recrystallization sintering method, which needs to be sintered under a protective atmosphere, the sintering temperature is as high as 2400 ° C, the sintering furnace is expensive and the sintering process is complicated.

Method used

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  • Preparation method of porous silicon carbide flat plate ceramic support
  • Preparation method of porous silicon carbide flat plate ceramic support
  • Preparation method of porous silicon carbide flat plate ceramic support

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] 18μm silicon carbide particles, hot melt additives, methyl cellulose, starch, triglycerin, oleic acid, ammonium polyacrylate, and cooked tung oil are 80.0: 7.0: 4.0: 2.5: 1.5: 1.0: 1.5: 2.5 by mass percentage Blended in water and ethanol (V / V=3:1) mixed solvent, the mixed solvent accounted for 30wt% of the total, dry mixed in a strong mixer for 10 minutes, added solvent and wet mixed for 120 minutes, and then smelted once in vacuum, Put the trained mud base at 20°C for 24 hours, and vacuum train the mud again before extrusion. The extruded mud is 110mm wide, 6mm thick, the middle channel is a 3mm×3mm square hole, the distance between the channels is 1mm, the distance from the channel to the surface of the plate support is 1.5mm, and the cutting length set during extrusion is 516mm. Porous silicon carbide Flat ceramic support mud body, extrusion pressure 10Mpa, extrusion speed 25mm / s. The trolley speed of the mud billet in the continuous microwave is 1000mm / min, and the...

Embodiment 2

[0045] 45 μm silicon carbide particles, hot melt additives, methyl cellulose, starch, triglycerin, oleic acid, ammonium polyacrylate, and cooked tung oil are 75.0: 10.0: 4.0: 3.0: 1.5: 1.0: 1.5: 4.0 by mass percentage Blended in a mixed solvent of water and ethanol (V / V=4:1), the mixed solvent accounts for 30wt% of the total, dry mixed in a strong mixer for 10 minutes, added solvent and wet mixed for 180 minutes, and then smelted once in vacuum, Put the trained mud base at 20°C for 24 hours, and vacuum train the mud again before extrusion. The extruded mud is 110mm wide, 6mm thick, the middle channel is a round hole with a diameter of 3mm, the distance between the channels is 1mm, the distance from the channel to the surface of the flat support body is 1.5mm, and the cutting length set during extrusion is 516mm. Porous silicon carbide Flat ceramic support mud body, extrusion pressure 8Mpa, extrusion speed 20mm / s. The trolley speed of the mud billet in the continuous microwave...

Embodiment 3

[0047]82 μm silicon carbide particles, hot melt additives, methyl cellulose, starch, triglycerin, oleic acid, ammonium polyacrylate, and cooked tung oil are 70.0: 12.0: 4.0: 4.0: 2.5: 1.5: 2.5: 3.5 by mass percentage Blended in a mixed solvent of water and ethanol (V / V=5:1), the mixed solvent accounts for 30wt% of the total, dry mixed in a strong mixer for 10 minutes, added solvent and wet mixed for 240 minutes, and then smelted once in a vacuum, Put the trained mud base at 20°C for 24 hours, and vacuum train the mud again before extrusion. The extruded mud is 250mm wide, 6mm thick, the middle channel is a 3mm×3mm square hole, the distance between the channels is 1mm, the distance from the channel to the surface of the plate support is 1.5mm, and the cutting length set during extrusion is 1016mm. Porous silicon carbide Flat ceramic support mud body, extrusion pressure 6Mpa, extrusion speed 20mm / s. The trolley speed of the mud billet in the continuous microwave is 1000mm / min, ...

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Abstract

The invention discloses the technical field of inorganic porous materials, and particularly relates to the technical field of inorganic membrane separation, in particular to a porous silicon carbide flat plate ceramic support and a preparation method thereof. The preparation method includes the steps: (1) pug preparation; (2) extrusion; (3) microwave drying; (4) high temperature firing; finally, natural cooling to room temperature. Compared with a recrystallization sintering method, the preparation method has the advantages of low firing temperature, low energy consumption and production costand simple preparation process. Besides, diffusive flow of a filtering medium in a wider space is ensured, filtering resistance is reduced, back flushing effects can be remarkably improved, so that filtering flux is increased, production cycle is short, production and operation cost is low, and automatic control and stable product performances are easily realized. The porous silicon carbide flat plate ceramic support can be used for special separation in industries such as chemical engineering, biological fermentation, papermaking, food and beverages and mineral processing.

Description

technical field [0001] The patent of the present invention relates to the technical field of inorganic porous materials, in particular to the technical field of inorganic membrane separation materials, specifically a porous silicon carbide flat ceramic support and a preparation method thereof. Background technique [0002] Membrane bioreactor (MBR) is an efficient sewage treatment process that combines membrane separation technology and biologically activated sludge method in traditional biological treatment technology. Through the sieving effect of the membrane pores, under a certain negative pressure, the water after the oxidative decomposition of the activated sludge is drawn out from the membrane pores, and the activated sludge is intercepted by the filter layer of the membrane, so as to achieve the purpose of sludge-water separation. At the same time, because the treated water is continuously pumped out, the concentration of activated sludge in the aerobic tank is high,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/565C04B35/64C04B38/06C02F3/12
CPCC02F3/1268C04B35/565C04B35/64C04B38/0645C04B2235/3203C04B2235/3208C04B2235/321C04B2235/3215C04B2235/3217C04B2235/3244C04B2235/3284C04B2235/3418C04B2235/349C04B2235/6562C04B38/0074C04B38/0054Y02W10/10
Inventor 陈锋涛王壮利於华国苏新科陈锦奎周志阳
Owner 台州利欧环保新材料有限公司
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