Production process for firing alumina foamed ceramic filter board in roller kiln

A foamed ceramic filtration and production process technology, applied in ceramic products, other household appliances, household appliances, etc., can solve the problems of inverted kiln, large temperature difference in the kiln, uneven product quality, etc., and achieves low unit consumption and flue gas. The effect of reducing the amount and stable product quality

Inactive Publication Date: 2012-06-20
HANGZHOU ZHONGYA NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The defects of the tunnel kiln include: 1. The tunnel kiln adopts flame-trap firing, and the temperature uniformity in the kiln is poor, and the product quality is unstable; 2. The kiln is manually entered, which is labor-intensive and low in output; 3. Push plates need to be used as kiln furniture , invisibly wasting a lot of energy; 4. The service life of the push plate is short and needs to be replaced constantly; 5. The stacking of filter plates is cumbersome and easily leads to the kiln down
[0004] The disadvantages of the shuttle kiln include: 1. The kiln body is relatively high, the temperature difference in the kiln is large, and the product quality is not uniform; 2. Manually enter the kiln, which is labor-intensive and low in output; 3. The product is cooled with the furnace, and the firing cycle is long. Obvious waste of energy; 4. Intermittent production, and the need to use boron boards as kiln furniture, which wastes a lot of energy virtually; 5. Due to factors such as atmosphere and firing personnel, it is difficult to achieve consistent product quality in each kiln
At this stage, there is no successful case of using a wide-bodied and elongated roller kiln (the kiln length can reach 125 meters) to prepare alumina foam ceramic filter plates

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] (1) Weigh in order by weight percentage: 50% of α-alumina, 5% of scrap, 10% of kaolin, 10% of potassium feldspar, 3% of white corundum, 6% of silicon micropowder, 16% of aluminum dihydrogen phosphate, and then add Put water with 20% weight of dry powder together into the ball mill for ball milling; the ball milling time is 3 hours, and mix evenly to form a slurry;

[0024] (2) Cut the polyurethane mesh sponge into 508*508*50 block sponge with a slope of 17°, use a five-roller-to-roller machine to impregnate and sizing, so that the slurry is evenly distributed on the mesh line, and the excess slurry material extrusion. Put the sized green body on the flat and porous aluminum plate;

[0025] (3) Put the green body on the porous aluminum plate on the drying cart and push it into the drying room; the maximum temperature of the drying room is set at 110°C, the temperature rises slowly, and the drying time is 7 hours, and the green body is fully dried so that The moisture c...

example 2

[0029] (1) Weigh in order by weight percentage: α-alumina 52%, waste 8%, kaolin 8%, potassium feldspar 6%, white corundum 2%, silicon micropowder 4%, aluminum dihydrogen phosphate 20%, then add Put water with 25% weight of dry powder together into the ball mill for ball milling; ball milling time is 5 hours, and mix evenly to form a slurry;

[0030] (2) Cut the polyurethane mesh sponge into 508*508*50 block sponge with a slope of 17°, use a five-roller-to-roller machine to impregnate and sizing, so that the slurry is evenly distributed on the mesh line, and the excess slurry material extrusion. Put the sized green body on the flat and porous aluminum plate;

[0031] (3) Put the green body on the porous aluminum plate on the drying cart and push it into the drying room; the maximum temperature of the drying room is set at 110°C, the temperature rises slowly, and the drying time is 8 hours, and the green body is fully dried so that The moisture content of the dried green body ...

example 3

[0035] (1) Weigh in order by weight percentage: α-alumina 55%, scrap 10%, kaolin 5%, potassium feldspar 3%, white corundum 5%, silicon micropowder 8%, aluminum dihydrogen phosphate 14%, and then add 15% of dry powder weight Put water together into a ball mill for ball milling; the ball milling time is 6 hours, and mix evenly to form a slurry;

[0036] (2) Cut the polyurethane mesh sponge into 508*508*50 block sponge with a slope of 17°, use a five-roller-to-roller machine to dip and sizing, so that the slurry is evenly distributed on the mesh line, and the excess slurry material extrusion. Put the sized body on the flat and porous tiles;

[0037] (3) Put the green body on the porous ceramic tile on the drying cart and push it into the drying room; the maximum temperature of the drying room is set at 110°C, the temperature rises slowly, and the drying time is 6 hours, and the green body is fully dried so that The moisture content of the dried green body is ≤1.0%;

[0038] (4...

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PUM

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Abstract

The invention relates to the field of the production of foamed ceramic filter boards, and aims to provide a production process for firing an alumina foamed ceramic filter board in a roller kiln. The process comprises the following steps of: weighing according to a formula, performing ball-milling and mixing uniformly to form slurry; cutting sponge, impregnating the sponge and sizing; drying, and guniting; and sintering in the lengthened roller kiln. According to the production process, the alumina foamed ceramic filter board is fired by utilizing the lengthened roller kiln, so the process is small in unit consumption, gas amount required by the roller kiln is little under the condition of producing the same quantity of the filter boards, the amount of discharged flue gas is also reduced greatly, and compared with the conventional technology, the production process has the advantages of energy conservation and environment friendliness; and the quality of the fired foamed ceramic filterboard is more stable.

Description

technical field [0001] The invention relates to the production field of foam ceramic filter plates, in particular to a production process for firing alumina foam ceramic filter plates in a roller kiln. Background technique [0002] As the third-generation filter material, ceramic foam filter plate has been developed for more than 20 years and has become a relatively mature market product. Among them, the patent numbers "200710139289.5", "200710139286.1" and "200710139288.0" respectively introduce the preparation process of alumina, silicon carbide and zirconia foam ceramic filters. These processes are also the production of most domestic manufacturers firing foam ceramic filter plates At present, all the processes are mainly shuttle kiln and tunnel kiln, and the following defects will exist in the process of sintering ceramic foam filter plates in tunnel kiln or shuttle kiln. [0003] The defects of the tunnel kiln include: 1. The tunnel kiln adopts flame-trap firing, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00
Inventor 王霞王水富王建新孔亚琴
Owner HANGZHOU ZHONGYA NEW MATERIALS TECH
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