Preparation method of composite ceramic filter core containing diatomite and charcoal

A technology of composite ceramics and diatomite, which is applied to ceramic products, clay preparation devices, chemical instruments and methods, etc., can solve the problems of diatomite filtration efficiency, filter water flux reduction, etc., so as to improve filtration efficiency and improve stability. , the effect of improving productivity

Active Publication Date: 2010-12-22
SANDA FILM SCI & TECH XIAMEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, Black During the preparation process of the black ceramic filter element, the sintering temperature is 1020-1200°C, which is higher than 1000°C. However, existing research has shown that when the sintering temperature is higher than 1000°C, the natural micropores in the diatomite will be damaged due to some Sintering and fusion will reduce the filtration efficiency of diatomaceous earth and the water flux of the filter element at the same time

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 1. Put 4000g of alumina balls (by weight ratio φ30mm: φ20mm: φ15mm = 1:2:1) into a 10-liter polyurethane ball mill tank, then add 1L of deionized water and 1000g of aluminum oxide balls with an average particle size of 30 μm Diatomite filter aid, 30g of food-grade cornstarch with an average particle size of 15 μm, 5g of water glass (modulus 3), 13g of anhydrous sodium carbonate and 3g of nano silver antibacterial agent. After the ball mill jar was sealed, ball milling was performed at a speed of 80 rpm for 8 hours to obtain a dispersed ceramic slurry.

[0025] 2. Open the ball mill tank, add 5g of carboxymethyl cellulose sodium salt and 30g of calcium bentonite, and then continue ball milling at a speed of 80rpm for 3 hours to obtain a partially flocculated and stable ceramic slurry.

[0026] 3. Let the partially flocculated ceramic slurry stand for 12 hours to ripen, then pour it into the plaster mold, let it stand for 15 minutes, then turn the plaster mold over and po...

Embodiment 2

[0031] 1. Put 4000g of alumina balls (by weight ratio φ30mm: φ20mm: φ15mm = 1:2:1) into a 5-liter polyurethane ball mill tank, then add 1.25L deionized water in turn, and the average particle size of 1000g is 30μm diatomite filter aid, 250g of food-grade cornstarch with an average particle size of 15 μm, 5g of water glass (modulus 3), 3g of anhydrous sodium carbonate and 3g of nano-silver antibacterial agent. After the ball mill jar was sealed, ball milling was performed at a speed of 80 rpm for 8 hours to obtain a dispersed ceramic slurry.

[0032] 2. Open the ball mill tank, add 30g of kaolin and 30g of calcium-based bentonite, and then continue ball milling at a speed of 80rpm for 3 hours to obtain a partially flocculated and stable ceramic slurry.

[0033] 3. Let the partially flocculated ceramic slurry stand for 48 hours to ripen, then pour it into the plaster mold, let it stand for 20 minutes, then turn the plaster mold over and pour out the remaining slurry; keep the mo...

Embodiment 3

[0038] 1. Put 4000g of alumina balls (by weight ratio φ30mm: φ20mm: φ15mm = 1:2:1) into a 10-liter polyurethane ball mill tank, then add 1.6L deionized water in turn, and the average particle size of 1000g is 30μm diatomite filter aid, 500g of food-grade cornstarch with an average particle size of 15μm, 5g of water glass (modulus 3), 4g of sodium carbonate and 13g of nano-silver antibacterial agent. After the ball mill jar was sealed, ball milling was performed at a speed of 60 rpm for 10 hours to obtain a dispersed ceramic slurry.

[0039] 2. Open the ball mill tank, add 5g of gum arabic and 50g of calcium-based bentonite, and then continue ball milling at a speed of 60rpm for 3 hours to obtain a partially flocculated and stable ceramic slurry.

[0040] 3. Let the partially flocculated ceramic slurry stand for 30 hours to ripen, then pour it into the plaster mold, let it stand for 35 minutes, then turn the plaster mold over and pour out the remaining slurry; keep the mold ups...

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PUM

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Abstract

The invention discloses a preparation method of a composite ceramic filter core containing diatomite and charcoal. In the preparation method, raw materials with high melting points are not used, and a mode of first dispersion and then partial flocculation is used for preparing a slurry for slip casting to enable raw materials and pores in a green body to be highly and uniformly dispersed, thus the sintering temperature is not higher than 950 DEG C, and natural micropores in the diatomite can not collapse because of high-temperature sintering.

Description

technical field [0001] The invention relates to a preparation method of a composite ceramic filter element, in particular to a preparation method of a high-precision composite ceramic filter element containing diatomite and carbon that can be used for direct drinking water filtering equipment. Background technique [0002] Pollutants in drinking water mainly include bacteria (such as Escherichia coli), organic matter (such as chlorinated hydrocarbons, benzene compounds) and heavy metal ions (such as lead, cadmium). During the sterilization process of the tap water we use daily, some organic matter and free chlorine combine to form carcinogenic organic chlorides (such as chloroform). In addition, microorganisms in the pipeline will reproduce again, which affects the quality of the water. Therefore, it is generally necessary to Drinkable after further purification. The water suitable for human drinking is not as pure as possible. Trace elements play a vital role in the develo...

Claims

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Application Information

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IPC IPC(8): B01D39/20C04B38/06B28B1/26B28C1/04
Inventor 蓝伟光洪昱斌罗文富
Owner SANDA FILM SCI & TECH XIAMEN
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