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Method for reclaiming aluminum oxide foamed ceramic wastes

A foamed ceramic and waste recycling technology, applied in chemical instruments and methods, ceramic products, separation methods, etc., can solve the problems of high price and cost, unfavorable environmental protection, consumption of new materials, etc.

Active Publication Date: 2011-08-17
HANGZHOU ZHONGYA NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the patent application number "200710139289.5" introduced a preparation method of alumina foam ceramics, and the patent application number "200610017435.2" also introduced a preparation method of a foam ceramic filter for casting, but in the final analysis, all new filters currently Product preparation must consume new materials, so the price and cost are high, and it is not conducive to environmental protection

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) The discarded alumina foam ceramic products are crushed by a ball mill;

[0028] The inner lining of the ball mill is made of 95 porcelain, and the inner grinding ball of the ball mill is 97 porcelain. The diameters of the grinding balls are 50mm, 30mm and 20mm respectively, and the weight ratio is 3:2:1. The ball milling process is direct dry milling, and the mass ratio of waste to ball weight is 1:1.2; it is milled to micron-level powder, and it is ready for use after passing through a 100-mesh sieve; the ball milling time is 15 hours.

[0029] (2) Weigh according to group distribution ratio;

[0030] The mass percentage of each component is: waste 10%, α-alumina 50%, calcined kaolin 15%, water-washed kaolin 15%, silica powder 4%, potash feldspar 6%. The binder is liquid aluminum dihydrogen phosphate, which is added at 22% of the total mass fraction of the slurry.

[0031] (3) Weigh the powders according to the proportion, mix them in a mixer and stir them evenly, and th...

Embodiment 2

[0036] (1) The discarded alumina foam ceramic products are pulverized by a ball mill;

[0037] The inner lining of the ball mill is made of 95 porcelain, and the inner grinding balls of the ball mill are 97 porcelain. The diameters of the grinding balls are 50mm, 30mm and 20mm respectively, and the weight ratio is 3:2:1. The ball milling process is direct dry milling, and the mass ratio of waste to ball weight is 1:1.5; it is milled to a micron-level powder, and it is ready to use after passing through a 100-mesh sieve; the ball milling time is 20 hours.

[0038] (2) Weigh according to the group distribution ratio;

[0039] The mass percentages of each component are: 20% waste, 50% α-alumina, 8% calcined kaolin, 8% water-washed kaolin, 4% silica powder, and 10% potash feldspar. The binder is liquid aluminum dihydrogen phosphate, which is added at 24% of the total mass fraction of the slurry.

[0040] (3)-(6) Same as Example 1.

Embodiment 3

[0042] (1) The discarded alumina foam ceramic products are pulverized by a ball mill;

[0043] The inner lining of the ball mill is made of 95 porcelain, and the inner grinding ball of the ball mill is 97 porcelain. The diameters of the grinding balls are 50mm, 30mm and 20mm respectively, and the weight ratio is 3:2:1. The ball milling process is wet milling with water, and the mass ratio of waste:ball:water is 1:1.5:0.8; it is milled to a micron-level powder, dried after passing through a 100-mesh sieve; the ball milling time is 15h.

[0044] (2) Weigh according to group distribution ratio;

[0045] The mass percentage of each component is: waste 12%, α-alumina 52%, calcined kaolin 10%,

[0046] Washed kaolin 10%, silica powder 8%, potassium feldspar 8%. The binder adopts liquid aluminum dihydrogen phosphate, which is added at 25% of the total mass fraction of the slurry.

[0047] (3)-(6) Same as Example 1.

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Abstract

The invention relates to the fields of formulas and preparation of aluminum oxide foamed ceramics, and aims to provide a method for reclaiming aluminum oxide foamed ceramic wastes. The method comprises the following steps of: firstly, ball-milling and crushing scrapped aluminum oxide foamed ceramic products into micro powder, and then weighing 10 to 20 percent of wastes, 50 to 60 percent of alpha-aluminum oxide, 7 to 15 percent of washed kaolin, 7 to 15 percent of calcined kaolin, 1 to 8 percent of silicon micro powder and 5 to 10 percent of potassium feldspar according to a proportion; adding an aluminum dihydrogen phosphate solution in an amount, which accounts for 22 to 32 mass percent of slurry, to prepare the slurry; uniformly dispersing the slurry on a foam network to prepare a blank; and drying and sintering the blank to obtain a new aluminum oxide foamed ceramic filter. By means of the method, the waste can be changed into valuable, the production cost is greatly reduced, and the environmental resource is well protected at the same time.

Description

Technical field [0001] The invention relates to the formulation and preparation field of alumina foam ceramics, in particular to a method for recycling alumina foam ceramics waste. Background technique [0002] As the pillar industry of the world's metal industrial materials, aluminum and aluminum alloy materials have a very large production output. From daily consumer products to aerospace high-tech products, the demand for aluminum and its alloy products is inseparable. Aluminum products are generally processed by melting and casting. Therefore, the quality of the aluminum melt used for casting directly affects the performance of the product after casting. [0003] In recent years, through the development of the third-generation filter material-ceramic foam filter, the qualification rate of aluminum products has been greatly improved, and the performance of aluminum and its alloy products has also been greatly improved. During the smelting process, because aluminum is a very a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/00C04B35/10C04B35/622B01D39/20
Inventor 王霞王水富王建新
Owner HANGZHOU ZHONGYA NEW MATERIALS TECH
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