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Gradient pore silicon carbide ceramic filter plate and preparation method thereof

A technology of silicon carbide ceramics and filter plates, which is applied in ceramic products, other household utensils, applications, etc., can solve the problems of easy blockage of pores, easy peeling of ceramsite, and low strength of filter plates, so as to reduce grain loss and improve mechanical strength , The effect of high opening porosity

Inactive Publication Date: 2017-10-20
常州市瑞泰物资有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention: Aiming at the disadvantages of low strength of the ceramic filter plate, easy peeling of ceramsite, and easy clogging of pores, a gradient pore silicon carbide ceramic filter plate and its preparation method are provided

Method used

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  • Gradient pore silicon carbide ceramic filter plate and preparation method thereof

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Effect test

example 1

[0025]Cut the flexible polyurethane foam with coarse, medium and fine pores into discs of the same size, soak them in 10% sodium hydroxide solution at 60°C for 2 hours, take out the flexible polyurethane foam and use After washing with deionized water for 2 times, transfer to mass fraction and soak in 2% sodium carboxymethylcellulose solution for 1h, take out the pretreated soft polyurethane foam, then weigh 450g silicon carbide, 100g kaolin, 110g potassium feldspar, Put 50g of bentonite, 50g of alumina, 30g of white corundum, 10g of talc powder, and 50g of silicon micropowder into a ball mill for ball milling, and screen out composite powders with particle sizes of 25-100 μm, 15-25 μm, and 0.5-15 μm, respectively. Take 100g of composite powder with different particle sizes and mix with 50g of deionized water, stir and mix evenly, then add 15g of aluminum dihydrogen phosphate, stir evenly to obtain ceramic slurry with different particle sizes, and immerse the coarse-pore pretre...

example 2

[0027] Cut the flexible polyurethane foam with coarse, medium and fine pores into discs of the same size, soak in 10% sodium hydroxide solution at 65°C for 3 hours, take out the flexible polyurethane foam and use After washing with deionized water for 3 times, transfer to mass fraction and soak in 2% sodium carboxymethyl cellulose solution for 2h, take out the pretreated soft polyurethane foam, then take by weighing 520g silicon carbide, 110g kaolin, 120g potassium feldspar, Put 55g of bentonite, 55g of alumina, 40g of white corundum, 15g of talc powder, and 65g of silicon micropowder into a ball mill for ball milling, and screen out composite powders with particle sizes of 25-100 μm, 15-25 μm, and 0.5-15 μm, respectively. Take 110g of composite powders with various particle sizes and mix them with 53g of deionized water, stir and mix evenly, then add 16g of aluminum dihydrogen phosphate, stir evenly to obtain ceramic slurry with various particle sizes, and immerse the coarse-p...

example 3

[0029] Cut the soft polyurethane foam with coarse, medium and fine pores into discs of the same size, soak in 10% sodium hydroxide solution at 70°C for 3 hours, take out the flexible polyurethane foam and use After washing with deionized water for 3 times, transfer to mass fraction and soak in 2% sodium carboxymethylcellulose solution for 2h, take out the pretreated soft polyurethane foam, then take by weighing 600g silicon carbide, 120g kaolin, 130g potassium feldspar, 60g of bentonite, 60g of alumina, 50g of white corundum, 20g of talcum powder, and 80g of silicon micropowder were put into a ball mill for ball milling, and the composite powders with a particle size of 25-100μm, 15-25μm, and 0.5-15μm were screened out, and 120g each Mix the composite powder with different particle sizes with 55g deionized water, stir and mix evenly, then add 16g of aluminum dihydrogen phosphate, stir evenly to get ceramic slurry with different particle sizes, and immerse the coarse-pore pretre...

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Abstract

The invention discloses a gradient pore silicon carbide ceramic filter plate and a preparation method thereof, and belongs to the field of filtering media. Coarse pore, medium pore and fine pore soft polyurethane foam bodies are cut into the same size of wafer shapes, the wafer shapes are in turn soaked with a sodium hydroxide solution and a sodium carboxymethyl cellulose solution to obtain coarse pore, medium pore and fine pore pretreated soft polyurethane foam bodies, silicon carbide, kaolin and the like are mixed by ball milling, all size levels of composite powder are screened, and respectively evenly mixed with deionized water and aluminium dihydrogen phosphate to obtain all size levels of ceramic slurry, the all size levels of ceramic slurry are added into respectively the coarse pore, medium pore and fine pore pretreated soft polyurethane foam bodies for soaking, rolling and stacking neatly according to the order of coarse pores, medium pores and fine pores to obtain a combined foam body, the combined foam body is dried, and the gradient pore silicon carbide ceramic filter plate is prepared by hanging slurry and drying of the combined foam body. The beneficial effects are that the gradient pore silicon carbide ceramic filter plate has high strength, ceramsite is not easy to flake off, the opening porosity is high, and the pores are not easy to be plugged.

Description

technical field [0001] The invention relates to a gradient pore silicon carbide ceramic filter plate and a preparation method thereof, belonging to the field of filter media. Background technique [0002] Ceramic filter plate, also known as ceramic filter membrane, ceramic plate, filter plate, etc., is a new type of filter medium made of corundum, silicon carbide, etc. through special processes. The ceramic filter plate also uses organic foam cotton with a three-dimensional network structure and connected pores as a carrier, which is invaded into a special ceramic slurry with thixotropy, and a special rolling process is adopted to make the ceramic slurry evenly coated with the skeleton of the carrier It is then dried and solidified, and then fired at high temperature. However, due to the many blind holes of the ceramic filter plate, the pores are easily blocked, thereby greatly reducing the filtering capacity of the ceramic filter plate. Chinese patent application number C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B35/565C04B35/622C04B35/64C04B35/63
CPCC04B38/0615C04B35/565C04B35/622C04B35/6309C04B35/64C04B2235/3217C04B2235/3418C04B2235/3472C04B2235/349C04B2235/5436C04B2235/5445C04B2235/6562C04B2235/6567C04B2235/96C04B2235/9607C04B38/007C04B38/0051C04B38/0074C04B38/0058
Inventor 陈刚方晓俊王之霖
Owner 常州市瑞泰物资有限公司
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