Aluminium oxide foam ceramic filter

A foamed ceramic and alumina technology, applied in filtration and separation, ceramic products, chemical instruments and methods, etc., can solve the problems of reducing the performance and processing performance of castings, unstable filtration effect, application limitations, etc., to achieve good filtration and Adsorption capacity, beneficial to environmental protection, good filtration and purification effect

Inactive Publication Date: 2008-04-23
晋城市富基新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, all these filters can only filter out large inclusions and very few small inclusions in molten metal through mechanical sieving
Due to the low refractoriness and strength of the aluminum silicate fiber filter, it can only be used for filtering non-ferrous alloys, cast iron and small steel castings, and it is difficult to withstand the impact of high-temperature metal fluid for a long time; the molybdenum wire and Although the boron nitride fibrous filter screen developed in the United States can be used to filter high-temperature alloys such as cast steel, its application is limited because of its high price.
There are also straight-hole core-type ceramic filters and refractory particle filters used for casting alloy filtration, but their porosity is small, and the filtration efficienc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] According to the weight ratio of 68.5:2 3:6.5:2, aluminum oxide, silicon dioxide, talc and kaolin are fully mixed to make ceramic powder.

[0051] Mix ceramic powder, carboxymethyl cellulose, polyvinyl alcohol, silica sol and water according to the weight ratio of 65:0.5:1:12:25, add to the mixer and stir for 2 to 3 hours to make the stirring evenly to make ceramic slurry .

[0052] Choose 10PPI soft polyurethane foam, process it into a size of 50mm×50mm×22mm, soak it in a 60°C alkali solution with a pH value of 7.5 for 20min to remove the film in the foam hole, and then rinse with water to remove the alkali solution, and then naturally dried to remove moisture, as a carrier for ceramic slurry.

[0053] Using the roll pressing and dipping process, add ceramic slurry to the foam plastic carrier, and then input the carrier into the slurry dipping machine for squeezing and dipping, and squeeze out excess slurry to make a foam ceramic filter blank.

[0054] Put the cerami...

Embodiment 2

[0057] According to the weight ratio of 70:20:5:5, aluminum oxide, silicon dioxide, talc and kaolin are fully mixed to make ceramic powder.

[0058] Mix ceramic powder, carboxymethyl cellulose, polyvinyl alcohol, silica sol and water according to the weight ratio of 72:0.8:0.6:13:18, add to the mixer and stir for 2 to 3 hours to make the stirring evenly to make ceramic slurry .

[0059] Choose 10PPI soft polyurethane foam, process it into a size of 50mm×50mm×22mm, soak it in a 50°C alkali solution with a pH value of 8.5 for 30min to remove the film in the foam hole, and then rinse with water to remove the alkali solution, and then naturally dried to remove moisture, as a carrier for ceramic slurry.

[0060] Using the roll pressing and dipping process, add ceramic slurry to the foam plastic carrier, and then input the carrier into the slurry dipping machine for squeezing and dipping, and squeeze out excess slurry to make a foam ceramic filter blank.

[0061] Put the ceramic f...

Embodiment 3

[0064] According to the weight ratio of 65:2 5:7:3, alumina, silicon dioxide, talc and kaolin are fully mixed to make ceramic powder.

[0065] Mix ceramic powder, carboxymethyl cellulose, polyvinyl alcohol, silica sol and water according to the weight ratio of 65:0.5:1:12:25, add to the mixer and stir for 2 to 3 hours to make the stirring evenly to make ceramic slurry .

[0066] Choose 10PPI soft polyurethane foam, process it into a size of 50mm×50mm×22mm, soak it in a 60°C alkali solution with a pH value of 8.5 for 30 minutes to remove the film in the foam plastic hole, and then rinse with water to remove the alkali solution, and then naturally dried to remove moisture, as a carrier for ceramic slurry.

[0067] Using the roll pressing and dipping process, add ceramic slurry to the foam plastic carrier, then input the carrier into the slurry dipping machine for extrusion and dipping, and squeeze out excess slurry to make a foam ceramic filter blank.

[0068] Put the ceramic ...

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PUM

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Abstract

The present invention relates to a aluminium oxide foamed ceramic filter for filtering and purifying molten aluminium, aluminium alloy and copper. Said invention uses aluminium oxide, silicon dioxide, talcum and kaoline clay to form ceramic powder, and adds carboxyl methyl cellulose, polyvinyl alcohol, silica sol and water to prepare slurry, uses soft polyurethane foamed plastics as carrier and makes them undergo the process of impregnating said carrier with slurry, extruding to obtain blank material, drying and sintering so as to obtain the invented aluminium oxide foamed ceramic filter. Said foamed ceramic filter has good high-temperature stability in the molten aluminium alloy, does not contaminate alloy and possesses good filtering and adsorption efficiency for removing oxide impurity and flux impurity form molten metal, so that it can obtain obvious filtering and purification effect.

Description

technical field [0001] The invention relates to the purification of molten metal, in particular to a foam ceramic filter. More specifically, the present invention relates to a ceramic foam filter containing alumina as a ceramic component, and the filter prepared by the present invention is used for filtering and purifying metal melts such as aluminum, aluminum alloy, and copper. Background technique [0002] During the smelting and pouring process of various metal liquid alloys, the casting reject rate caused by casting defects such as non-metallic inclusions and shrinkage holes is generally as high as 50-60% of the total rejects. Inclusion defects not only seriously reduce the mechanical properties and casting properties of castings, but also have harmful effects on the machining and appearance of castings. Purifying liquid casting alloys, reducing or eliminating various non-metallic inclusions and exhaust gases are undoubtedly important technical measures to obtain high-q...

Claims

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Application Information

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IPC IPC(8): B01D39/20C04B35/10C04B38/06B22D11/119
Inventor 李军虎关晋军逯文强刘志刚田建刚秦胜利
Owner 晋城市富基新材料股份有限公司
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