CN101407410A - Method of preparing alumina ceramic prilling powder for sealed ring - Google Patents
Method of preparing alumina ceramic prilling powder for sealed ring Download PDFInfo
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- CN101407410A CN101407410A CNA2008102264422A CN200810226442A CN101407410A CN 101407410 A CN101407410 A CN 101407410A CN A2008102264422 A CNA2008102264422 A CN A2008102264422A CN 200810226442 A CN200810226442 A CN 200810226442A CN 101407410 A CN101407410 A CN 101407410A
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Abstract
The invention relates to a preparation method for alumina ceramic granulated powder used by a sealing ring, which is characterized in that the preparation process comprises: (1) weighting and mixing alpha alumina, silicon powder, light calcium carbonate, kaolin, burning talc magnesia and yttria, carrying out dry milling, crashing and uniformly mixing; (2) placing the uniformly mixed powder in a ball mill, diluting, adding a dispersant, a binder and a release agent and milling into slurry; (3) screening the milled slurry, removing iron, putting in a spray drying tower to carry out spray granulation; and (4) screening the spray granulated powder by a 40-mesh screen and a 200-mesh screen, taking the powder between the two screens as the finished product. The granulated powder prepared by the method of the invention has the advantages of solid granule, reasonably distributed granularity, large loose packed density, moderate strength, good fluidity and easy mold release. Moreover, the alumina sealing ring can be provided with microcrystalline structure only through the common dry pressing and sintering technology. The ceramic article has high tightness, and the surface of which has no pores found when being amplified by 20 times after abrasive polishing.
Description
Technical field
The present invention relates to a kind of preparation method of alumina ceramic prilling powder for sealed ring.
Background technology
Alumina-ceramic is because of having excellent technique performances such as physical strength height, hardness is big, chemical resistance is good, and raw material sources are wide, price is relatively cheap, processing and manufacturing technology advantage such as maturation comparatively, so be widely used in the wear ring manufacturing.The defective that the aluminum oxide wear ring of domestic production at present exists is difficult to adapt to the use needs of many special industries.Not only corrosion-resistant as industries such as medical machinery, chemical industry urgent need, and the wear ring that hardness is big, density is high.Adopt commercially available common alumina ceramic prilling powder, through follow-up unconventional complete processing, though can prepare satisfactory product, the huge cost that increases is that enterprise holds far away and can't stand.Thereby must start with from raw material, prepare a kind of alumina ceramic prilling powder of above-mentioned wear ring special use.
Summary of the invention
Purpose of the present invention is exactly the deficiency at above-mentioned prior art, provides a kind of and can satisfy that corrosion-resistant, hardness is big, the special industry alumina ceramic prilling powder for sealed ring preparation method of density high request.
The objective of the invention is to realize by the following technical solutions.
A kind of preparation method of alumina ceramic prilling powder for sealed ring is characterized in that its preparation process comprises:
(1) αYang Hualv, silicon powder, light calcium carbonate, kaolin, burning talcum magnesium oxide and yttrium oxide are carried out weigh batching, dry grind, pulverize and mix, batching scale weight consists of: αYang Hualv 90%～99%, silicon powder 0～2.5%, light calcium carbonate 0～2%, kaolin 0～3% burns talcum magnesium oxide 0.6%～3%, yttrium oxide 0.3%～0.5%;
(2) the above-mentioned powder that mixes is placed ball mill, with the weight ratio dilution of pure water by 1: 0.8, and press composition adding dispersion agent, binding agent and releasing agent, ball milling is made slip; Add dispersion agent and be 0.4%～0.6% of batching gross weight, binding agent is 1.2%～2.0% of the batching gross weight, and releasing agent is batching gross weight 0.5～1.0% weight;
(3) the ball milling finish mix was starched 100 mesh sieves, through deironing, spray-dried tower mist projection granulating;
(4) with the mist projection granulating powder, cross 40 orders and 200 mesh sieves, the powder of getting between the two-layer screen cloth is a finished product.
The preparation method of a kind of alumina ceramic prilling powder for sealed ring of the present invention is characterized in that its Al of described αYang Hualv
2O
3Content is 99.6%, and former grain fineness number is 1～2 μ m.
The preparation method of a kind of alumina ceramic prilling powder for sealed ring of the present invention is characterized in that described binding agent is a polyvinyl alcohol, and model is 17-88; Described releasing agent is an emulsifying wax.
The preparation method of a kind of alumina ceramic prilling powder for sealed ring of the present invention, real in the granulation powder particles of preparation, rational size distribution; Loose density is greater than 1.05g/cm
3Intensity is moderate, good fluidity, the easily demoulding.This granulation powder only need just can make the aluminum oxide wear ring have microlitic structure through conventional dry-pressing formed and firing process.Porcelain spare density height, the surface is amplified 20 times and is not found pore behind grinding and polishing.
Embodiment
A kind of preparation method of alumina ceramic prilling powder for sealed ring, its preparation process comprises:
(1) αYang Hualv, silicon powder, light calcium carbonate, kaolin, burning talcum magnesium oxide and yttrium oxide are carried out weigh batching, dry grind, pulverize and mix, batching scale weight consists of: αYang Hualv 90%～99%, silicon powder 0～2.5%, light calcium carbonate 0～2%, kaolin 0～3% burns talcum magnesium oxide 0.6%～3%, yttrium oxide 0.3%～0.5%;
(2) the above-mentioned powder that mixes is placed ball mill, with the weight ratio dilution of pure water by 1: 0.8, and press composition adding dispersion agent, binding agent and releasing agent, ball milling is made slip; Add dispersion agent and be 0.4%～0.6% of batching gross weight, binding agent is 1.2%～2.0% of the batching gross weight, and releasing agent is batching gross weight 0.5～1.0% weight;
(3) the ball milling finish mix was starched 100 mesh sieves, and deironing, spray-dried tower mist projection granulating, pump feed pressure are 1.8～2.2MPa, 350～380 ℃ of inlet temperatures, 105～120 ℃ of temperature outs;
(4) the mist projection granulating powder is placed mixer mixed 0.5 hour, cross 40 orders and 200 mesh sieves, the powder of getting between the two-layer screen cloth is a finished product.
Its Al of described αYang Hualv
2O
3Content is 99.6%, and former grain fineness number is 1～2 μ m.Described dispersion agent is a commercially available product, and code name is A15.Described binding agent is a polyvinyl alcohol, and model is 17-88.Described releasing agent is commercially available emulsifying wax.
Embodiment 1
Raw material composition: α-Al
2O
3Micro mist 90%, silicon powder 2.5%, light calcium carbonate 2%, kaolin 3%, burning talcum 2%, yttrium oxide 0.5%.
Pulverize and mix according to above-mentioned composition requirement weighing, dry grinding.The powder that mixes is placed ball mill, with the weight ratio dilution of pure water by 1: 0.8, and add dispersion agent 0.6%, binding agent 1.3% and releasing agent 0.5%, ball milling was made slip in 24 hours.Above-mentioned slip is crossed 100 mesh sieves and deironing, and spray-dried tower mist projection granulating, pump feed pressure are 1.8～2.2MPa, 350～380 ℃ of inlet temperatures, 105～120 ℃ of temperature outs.Place mixer to mix 0.5 hour in the mist projection granulating powder, cross 40 orders and 200 mesh sieves, get the powder between the two-layer screen cloth, check, packing warehouse-in.
Embodiment 2
Raw material composition: α-Al
2O
3Micro mist 93.5%, silicon powder 1%, light calcium carbonate 1.5%, kaolin 2%, burning talcum 1.5%, yttrium oxide 0.5%.
Pulverize and mix according to above-mentioned composition requirement weighing, dry grinding.The powder that mixes is placed ball mill, with the weight ratio dilution of pure water by 1: 0.8, and add dispersion agent 0.5%, binding agent 1.5% and releasing agent 0.5%, ball milling was made slip in 24 hours.Above-mentioned slip is crossed 100 mesh sieves and deironing, and spray-dried tower mist projection granulating, pump feed pressure are 1.8～2.2MPa, 350～380 ℃ of inlet temperatures, 105～120 ℃ of temperature outs.Place mixer to mix 0.5 hour in the mist projection granulating powder, cross 40 orders and 200 mesh sieves, get the powder between the two-layer screen cloth, check, packing warehouse-in.
Embodiment 3
Raw material composition: α-Al
2O
3Micro mist 96%, light calcium carbonate 1%, kaolin 1.5%, burning talcum 1%, yttrium oxide 0.5%.
Pulverize and mix according to above-mentioned composition requirement weighing, dry grinding.The powder that mixes is placed ball mill, with the weight ratio dilution of pure water by 1: 0.8, and add dispersion agent 0.5%, binding agent 1.7% and releasing agent 0.5%, ball milling was made slip in 24 hours.Above-mentioned slip is crossed 100 mesh sieves and deironing, and spray-dried tower mist projection granulating, pump feed pressure are 1.8～2.2MPa, 350～380 ℃ of inlet temperatures, 105～120 ℃ of temperature outs.Place mixer to mix 0.5 hour in the mist projection granulating powder, cross 40 orders and 200 mesh sieves, get the powder between the two-layer screen cloth, check, packing warehouse-in.
Embodiment 4
Raw material composition: α-Al
2O
3Micro mist 99%, burning talcum 0.6%, yttrium oxide 0.4%.
Pulverize and mix according to above-mentioned composition requirement weighing, dry grinding.The powder that mixes is placed ball mill, with the weight ratio dilution of pure water by 1: 0.8, and add dispersion agent 0.5%, binding agent 1.8% and releasing agent 0.5%, ball milling was made slip in 24 hours.Above-mentioned slip is crossed 100 mesh sieves and deironing, and spray-dried tower mist projection granulating, pump feed pressure are 1.8～2.2MPa, 350～380 ℃ of inlet temperatures, 105～120 ℃ of temperature outs.Place mixer to mix 0.5 hour in the mist projection granulating powder, cross 40 orders and 200 mesh sieves, get the powder between the two-layer screen cloth, check, packing warehouse-in.
Claims (3)
1. the preparation method of an alumina ceramic prilling powder for sealed ring is characterized in that its preparation process comprises:
(1) αYang Hualv, silicon powder, light calcium carbonate, kaolin, burning talcum magnesium oxide and yttrium oxide are carried out weigh batching, dry grind, pulverize and mix, batching scale weight consists of: αYang Hualv 90%～99%, silicon powder 0～2.5%, light calcium carbonate 0～2%, kaolin 0～3% burns talcum magnesium oxide 0.6%～3%, yttrium oxide 0.3%～0.5%;
(2) the above-mentioned powder that mixes is placed ball mill, with the weight ratio dilution of pure water by 1: 0.8, and press composition adding dispersion agent, binding agent and releasing agent, ball milling is made slip; Add dispersion agent and be 0.4%～0.6% of batching gross weight, binding agent is 1.2%～2.0% of the batching gross weight, and releasing agent is batching gross weight 0.5～1.0% weight;
(3) the ball milling finish mix was starched 100 mesh sieves, through deironing, spray-dried tower mist projection granulating;
(4) with the mist projection granulating powder, cross 40 orders and 200 mesh sieves, the powder of getting between the two-layer screen cloth is a finished product.
2. the preparation method of a kind of alumina ceramic prilling powder for sealed ring according to claim 1 is characterized in that its Al of described αYang Hualv
2O
3Content is 99.6%, and former grain fineness number is 1～2 μ m.
3. according to the preparation method of the described a kind of alumina ceramic prilling powder for sealed ring of claim 1, it is characterized in that described binding agent is a polyvinyl alcohol, model is 17-88; Described releasing agent is an emulsifying wax.
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| CN101941836A (en) * | 2010-08-30 | 2011-01-12 | 济源市更新瓷料有限公司 | Low-temperature ceramic-firing high-density alumina ceramic granulation powder and preparation method thereof |
| CN102432317A (en) * | 2011-09-20 | 2012-05-02 | 宜兴市九荣特种陶瓷有限公司 | Microcrystalline alumina wear resistant ceramics and preparation method thereof |
| CN102490253A (en) * | 2011-11-22 | 2012-06-13 | 中国铝业股份有限公司 | Forming method and forming mold for alumina ceramic crucible |
| CN102491736A (en) * | 2011-11-24 | 2012-06-13 | 中国铝业股份有限公司 | Manufacturing method of peraluminous ceramic rings for valves |
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| CN113173779A (en) * | 2021-04-29 | 2021-07-27 | 江西工陶院精细陶瓷有限公司 | Alumina filler particle, preparation method thereof and preparation method of alumina filler ball |
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| US5587346A (en) * | 1995-06-16 | 1996-12-24 | Osram Sylvania, Inc. | Translucent polycrystalline alumina |
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Effective date of registration: 20150430 Address after: 450041 Industrial Road, 118 street, Henan, Zhengzhou Patentee after: ZHENGZHOU HICER HIGH TECH CERAMICS Co.,Ltd. Address before: 100082 Beijing, Xizhimen, North Street, No. 62, No. Patentee before: ALUMINUM CORPORATION OF CHINA Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.118, Gongye Road, Shangjie District, Zhengzhou City, Henan Province, 450041 Patentee after: China Aluminum New Materials Zhengzhou Co.,Ltd. Address before: No.118, Gongye Road, Shangjie District, Zhengzhou City, Henan Province, 450041 Patentee before: ZHENGZHOU HICER HIGH TECH CERAMICS Co.,Ltd. |