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Foamed ceramic filter and making method thereof

A technology of foam ceramics and filters, which is applied in the direction of membrane filters, ceramic products, chemical instruments and methods, etc., can solve the problems of high price and unsatisfactory filtration of molten steel, and achieve good porosity, good filtration and adsorption capacity , The effect of simple preparation process

Inactive Publication Date: 2016-12-14
JINAN SHENGQUAN DOUBLE SURPLUS CERAMIC FILTER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN102173856A can only handle molten metal below 1550°C
The first two cannot meet the filtration of molten steel, and the latter two are more expensive

Method used

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  • Foamed ceramic filter and making method thereof
  • Foamed ceramic filter and making method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0142] Silicon carbide powder: 25%; zircon powder: 40%; silicon oxide: 10%; calcium lignosulfonate: 4%; aluminum phosphate solution (containing aluminum phosphate 7.5%) 15%. The above-mentioned materials are all commercially available materials, and the stated ratios are all percentages by weight. In the above powder, 0.1% xanthan gum and 5.9% water need to be added. Slurry is made by mixing powder and water with a high-efficiency mixer. This slurry is used to coat polyurethane foam. After the foam is coated with the slurry, remove the blocked holes with air, then put it into a microwave drying oven, keep it warm at 100-120°C for 1 hour, put it into a sintering furnace, and then sinter at 1450°C. The polyurethane foam therein is also a commercially available material.

[0143] The size of the filter made according to this formula is 50×50×15mm, and the porosity is 82%. 50kg of molten steel was filtered at 1610°C. As a result, the filter withstood the test conditions and fi...

Embodiment 2

[0146] Silicon carbide powder: 20%; zirconia powder: 40%; silicon oxide: 17%; aluminum sol: 10%. The above-mentioned materials are all commercially available materials, and the stated ratios are all percentages by weight. In the above powder, 1% of bentonite and 12% of water need to be added. Slurry is made by mixing powder and water with a high-efficiency mixer. This slurry is used to coat polyurethane foam. After the foam is coated with the slurry, remove the blocked holes with air, then put it into a hot air drying furnace, keep it warm at 100-120°C for 2 hours, put it into a sintering furnace, and then sinter at 1300°C. The polyurethane foam therein is also a commercially available material.

[0147] The size of the filter made according to this formula is 50×50×15mm, and the porosity is 83%. 50kg of molten steel was filtered at 1610°C. As a result, the filter withstood the test conditions and filtered the molten steel as required.

[0148] The chemical composition of...

Embodiment 3

[0150] Silicon carbide powder: 35%; zirconia powder: 30%; silicon oxide: 10%; silica sol: 10%. The above-mentioned materials are all commercially available materials, and the proportions are all percentages by weight. In the above powder, 15% water needs to be added. Slurry is made by mixing powder and water with a high-efficiency mixer. This slurry is used to coat polyurethane foam. After the foam is coated with the slurry, remove the blocked holes with air, then put it into a hot air drying furnace, keep it warm at 100-120°C for 1 hour, put it into a sintering furnace, and then sinter at 1100°C. The polyurethane foam therein is also a commercially available material.

[0151] The size of the filter made according to this formula is 50×50×15mm, and the porosity is 84%. 50kg of molten steel was filtered at 1610°C. As a result, the filter withstood the test conditions and filtered the molten steel as required.

[0152] The chemical composition of the manufactured filter is...

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Abstract

The invention relates to a foamed ceramic filter and a making method thereof. The foamed ceramic filter is prepared from, by weight, 20%-50% of silicon carbide, 20%-55% of zirconium oxide and 10%-36% of silicon oxide, and the quantities of the materials are all based on the total weight of the foamed ceramic filter. The invention further relates to the method for making the foamed ceramic filter. The method includes the following steps that a, slurry of the silicon carbide, the zirconium oxide or zirconium oxide precursors, silicon oxide or silicon oxide precursors, a bonder, an optional additive and liquid carriers is provided; b, porous organic foam is coated with the slurry; c, the porous organic foam coated with the slurry is dried, and a blank is obtained; d, the blank is sintered in oxygen containing atmosphere, and the foamed ceramic filter is obtained. The foamed ceramic filter has the advantages of being resistant to high temperature, low in cost and the like.

Description

technical field [0001] The invention relates to the field of manufacturing high-temperature filters used in the foundry industry, and more particularly relates to a ceramic foam filter for filtering molten metal and a manufacturing method thereof. Background technique [0002] The purification of molten metal plays an important role in improving the mechanical properties of castings. At present, the filter device used for the purification of molten metal is mainly a ceramic filter, which can effectively intercept harmful impurities in the molten metal and change the molten metal from turbulent flow to laminar flow, eradicate large inclusions in the molten metal, and remove impurities in the molten metal. Small inclusions can improve the organizational structure, effectively reduce the gas and harmful elements in the molten metal, and play a role in purifying and homogenizing the molten metal. [0003] Chinese patent application CN101164655A relates to a kind of silicon carb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/06C04B35/48C04B35/565B01D39/20
CPCB01D39/2093C04B35/481C04B35/565C04B38/0615C04B2235/3418C04B2235/3427C04B2235/447C04B2235/3218C04B2235/96C04B38/0003C04B38/0074C04B38/0067B01D39/20C04B35/48C04B2235/3244C04B2235/3826C04B2235/402C04B2235/48C04B2235/656C04B2235/9676C04B35/488C04B35/6306C04B35/6316C04B35/6365C04B38/00C04B2111/0087C04B2111/00793C04B2111/2084C04B2111/26C04B2111/40C04B38/0051B01D2239/10C22B9/023C04B38/06
Inventor 祝建勋刘敬浩杨淑金
Owner JINAN SHENGQUAN DOUBLE SURPLUS CERAMIC FILTER
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