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Zirconium oxide foamed ceramic filter

A technology of zirconia ceramics and filters, applied in the direction of filtration and separation, ceramic products, chemical instruments and methods, etc., can solve the problems of high cost and large cost difference of zirconia, and achieve the effect of excellent product quality and low cost

Inactive Publication Date: 2008-09-10
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of processed zirconia is high, generally reaching about 40,000 yuan
The cost of monoclinic zirconia is only 20,000 yuan, and the cost varies greatly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 850 grams of fused monoclinic zirconia with an average particle size of 10 microns, 50 grams of -320 mesh calcium oxide, 25 grams each of aluminum oxide and silicon oxide, 50 grams of vinyl acetate and 120 grams of water, 0.5 grams The antifoaming agent is mixed into a slurry in a high-speed dispersing mixer, coated on a 55*55*22mm 10PPI polyurethane sponge, then dried, and fired at 1600°C for 3 hours to obtain a zirconia foam ceramic filter .

Embodiment 2

[0018] 950 grams of fused monoclinic zirconia with an average particle size of 10 microns, 30 grams of -200 mesh yttrium oxide, 20 grams of polyvinyl alcohol and 120 grams of water, 0.5 grams of defoaming agent, 0.5 grams of wetting and 0.5 grams of burning accelerator titanium oxide are mixed into a slurry in a high-speed dispersing mixer, coated on a 55*55*22mm 10PPI polyurethane sponge, then dried, and fired at 1570°C for 5 hours to obtain Zirconia ceramic foam filter.

Embodiment 3

[0020] 920 grams of chemical method monoclinic zirconia with an average particle diameter of 5 microns, 35 grams of -320 mesh magnesium oxide, 45 grams of silica-alumina gel and 110 grams of water, and 0.5 grams of defoamer are mixed into a slurry, coated with Hang it on a 110*110*25mm 10PPI polyurethane sponge, then dry it, heat it at 1680°C for 3 hours and burn it to obtain a zirconia foam ceramic filter.

[0021] For the zirconia foam ceramic filters of the above-mentioned Examples 1-3, the compressive strength at normal temperature is greater than 1.8Mpa. 5 pieces of filters were poured respectively, the pouring temperature was 1610--1640°C, the weights of molten steel were 50kg and 150kg respectively, and the pouring head was about 350mm. All the products passed the test without any breakage.

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Abstract

The invention relates a ceramic filter used in the foundry industry, in particular to a zirconium oxide ceramic foam filter with high resistance to heat shock and elevated temperature strength. The raw material of the zirconium oxide ceramic foam filter of the invention has the following ingredients by weight portions: 80-97 percent of oblique crystal zirconium, 2-10 percent of stabilizer and 1-10 percent of binder; the stabilizers are two or more of calcium oxide, aluminium oxide, silicon oxide, magnesium oxide, yttrium oxide, cerium oxide and other rare earth oxides; the binder is inorganic or / and organic ones. The zirconium oxide ceramic foam filter of the invention can be used in the filtering of high-temperature alloys, and has advantages of low cost and superior quality compared with the filters made from pre-made stabilized zirconium.

Description

(1) Technical field [0001] The invention belongs to a ceramic filter used in the foundry industry, in particular to a zirconia foam ceramic filter with thermal shock resistance and high temperature strength. (2) Background technology [0002] Ceramic filter is a new type of filter developed in the past ten or twenty years. Due to its good filtering effect, it has attracted widespread attention and can be used in casting, metallurgy, aluminum alloy profiles, and chemical industries. It can effectively eradicate large inclusions in molten metal, remove small inclusions in molten metal, improve organizational structure, and effectively reduce the content of gases and harmful elements in molten metal. [0003] Developed countries have researched and developed foam ceramic filter materials and corresponding products for cast steel and high-temperature alloys of various materials in the past two decades. The MgO partially stabilized zirconia ceramic filter from Consolidated Alumi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D39/20C04B38/06
Inventor 祝建勋沈淑丽刘敬浩徐传伟徐洪森王庆冀
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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