CN1216831C - Making process of porous ceraimc filter element - Google Patents
Making process of porous ceraimc filter element Download PDFInfo
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- CN1216831C CN1216831C CN 03126598 CN03126598A CN1216831C CN 1216831 C CN1216831 C CN 1216831C CN 03126598 CN03126598 CN 03126598 CN 03126598 A CN03126598 A CN 03126598A CN 1216831 C CN1216831 C CN 1216831C
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Abstract
The present invention discloses a method for making the ceramic filter core of a water purifier by the process of adding hole forming agents, which comprises the following steps: a material composed of a base body material, a fused block and grain starch is compounded; ball milling while adding water, vacuum defoaming, molding, preparing biscuit, drying biscuit and calcining biscuit are carried out, wherein in the process of calcining biscuit, a furnace chamber adopts a temperature control mode through a program; the furnace chamber adopts an anoxic dry distillation mode at the room temperature of-700 DEG C with 20 DEG C more or less, and then air is introduced into the furnace chamber, and the biscuit is oxidized and calcined. The present invention uses the grain starch as a hole forming agent and an adhesive, and a product with a complicated shape can be made by injecting slurry or punch forming. The product has high product size precision. The prefabricated fused block is used as a binding agent. The present invention has the advantages of simplified formula, low sintering temperature and high finished product rate (90%). The present invention is suitable for various base body materials and is a production process with low cost.
Description
Technical field
The present invention relates to the manufacture method of porous ceramic articles, relate more specifically to add the method that pore-forming material technology is made the water purifier porous ceramic filter element.
Background technology
Adding pore-forming material technology manufacturing porous ceramics is to add pore-forming material in ceramic batch, utilizes pore-forming material to occupy certain space in base substrate, and then by sintering, matrix is left in pore-forming material gasification or oxidation to be become pore and obtain porous ceramics.It is body material with quartz, aluminum oxide powder, trichroite, silicon carbide etc. generally that batching is formed, eutectic composition with compositions such as feldspar, clays is a wedding agent, as pore-forming material, need a certain amount of binding agent to make material be easy to moulding with gac, wood sawdust etc. in addition.
Porous ceramics is widely used in each field as filtration, separation, sound-absorbing, catalyzer etc., the requirement that different purposes are had nothing in common with each other to indexs such as the aperture of porous ceramics, folding strength, void content, resistances to elevated temperatures.Ceramic Filter Coundles for Water Purifier is mainly used in the filtration of pure water or drinkable water, general is used at normal temperature, requirement to intensity and resistance to elevated temperatures is lower, is requiring to guarantee under the prerequisite of filtering accuracy big as far as possible filtration velocity and alap manufacturing cost to be arranged on the product performance.Yet by prior art, because prescription is complicated, calcination time is long or sintering finished rate is low, the manufacturing cost of Ceramic Filter Coundles for Water Purifier is obviously too high.
Summary of the invention
The purpose of this invention is to provide a kind of sintering temperature and low, the low-cost method of making the small-bore filter element of water purifier.
The inventive method may further comprise the steps:
A. preparation is prepared burden: batching is formed and content (weight) is: body material 60～70%, frit 5～12%, cereal starch 20～30%, wherein, body material is silica powder, medical stone powder, aluminum oxide powder, carborundum powder, mullite powder or trichroite powder, and the composition of frit and content (weight) are: SiO
260～80%, Al
2O
31～10%, CaO 2～10%, and MgO 0～5%, Na
2O 5～15%, K
2O 0～5%.
B. add water for ball milling: the ratio in batching gross weight 1: 0.4～0.7 in above-mentioned batching adds water, and ball milling formed slurry in 10～16 hours, tailed over below 2% after ball milling disposed slurry fineness preferably is controlled at 320 mesh sieves.
C. froth in vacuum: place vacuum to remove bubble in the slurry behind the ball milling.
D. biscuit and dry biscuit are produced in moulding: the slurry that will remove behind the bubble becomes biscuit by the shape need moulding of finished product, then biscuit is dried or is being lower than 100 ℃ of oven dry down.
E. calcine biscuit: calcining biscuit process burner hearth adopts following programed temperature: temperature rising speed is 1.1～1.8 ℃/minute between room temperature～200 ℃, temperature rising speed is 1.6～2.7 ℃/minute between 200～600 ℃, temperature rising speed is 0.6～1.1 ℃/minute between 600～700 ℃, with 1000～1200 ℃ to terminal of 1.3～2.7 ℃/minute speed elevated temperatures, under terminal temperature, be incubated 0.5～1.5 hour more than 700 ℃.
In calcining biscuit process, burner hearth burner hearth between room temperature～700 ± 20 ℃ adopts anoxic destructive distillation mode to calcine biscuit, to the burner hearth bubbling air biscuit is carried out oxidizing roasting then.
Preferably 1020～1100 ℃ of the terminal temperatures of above-mentioned calcination process.
Among the present invention, frit is that natural mineral and/or the industrial chemicals that will contain mentioned component mix, and 1300 ℃ of congruent meltings, shrend forms.It is preferably formed and content (weight) is: SiO
267.5～74.1%, Al
2O
32.8～9.5%, CaO 7.5～8.8%, MgO 0.5～2.1%, Na
2O 9.3～12.4%, K
2O 1.4～4.5%.
Cereal starch is preferably selected one or more in Semen Maydis powder, ground rice, flour, the sorghum flour.
The present invention can in crushing mill spreading granulation, produce biscuit with the punching block impact briquetting with the slurry drying behind the ball milling to water ratio 10～14% (weight) in hydropress.
The present invention also can the ratio in slurry gross weight 0.1～2% add 45～50% (weight) Na in slurry
2SiO
3The aqueous solution, 40～45% (weight) Na
2CO
3The aqueous solution or 3 5～40% (weight) the NaOH aqueous solution is cast in slurry in the gypsum mold behind the uniform mixing, and biscuit is produced in the dehydration moulding.
Among the present invention, the temperature control program of room temperature～700 ℃ burner hearth is preferably in the calcining biscuit process: temperature rising speed is 1.2～1.6 ℃/minute between room temperature～200 ℃, temperature rising speed is 1.7～2.3 ℃/minute between 200～600 ℃, and temperature rising speed is 0.7～0.9 ℃/minute between 600～700 ℃.The temperature increase rate of burner hearth is preferably 1.4～2 ℃/minute between 700 ℃～terminal temperature.
The present invention with cereal starch as pore-forming material and binding agent, can use slip casting or impact forming method to make complex-shaped goods, the product's dimensional precision height, wedding agent adopts the ready-formed frit, simplify prescription, adapt to multiple body material, firing temperature is low, yield rate can reach 90%, is a production technique cheaply.Product aperture 2～20 μ m that the present invention makes, void content 50～55%, about folding strength 10Mpa, filtration velocity 16～20ml/hrcm
2(height of water 200mm), degerming rate 97～99% meets the service requirements of filter element of water purifier, better solves the contradiction of the big infiltration capacity in ceramic element small-bore.The present invention can be by body material and cereal starch the aperture of particle size adjustment finished product.
Embodiment
Embodiment 1: get silica powder 66kg, frit 8kg and ground rice 26kg, add the water glass solution of 43kg water and 0.8kg concentration 50% (weight), ball milling tailed over less than 0.5% after ball milling disposed slurry fineness is controlled at 320 mesh sieves about 16 hours in ball mill.Slurry is removed bubble in a vacuum, and injection forming is made biscuit in gypsum mold, dries.Biscuit is placed the normal pressure firing furnace, and burner hearth is with 1.3 ℃/minute speed elevated temperature to 200 ℃, and the back is increased to 600 ℃ with 2 ℃/minute speed, is increased to 700 ℃ with 0.8 ℃/minute speed again.Burner hearth heats biscuit in anoxic destructive distillation mode before 700 ℃, the air that feeds preheating to burner hearth after 700 ℃ is by the burning of the combustiblesubstance in the biscuit, and controlled temperature is increased to 1020 ℃ with 1.8 ℃/minute speed simultaneously, be incubated 1 hour postcooling down at 1020 ℃, become finished product through post-treatment again.The products obtained therefrom outward appearance is pure white, mean pore size 2 μ m, maximum diameter of hole 5 μ m, void content 50.3%, filtration velocity 16ml/hrcm
2(height of water 200mm) is about folding strength 7.4Mpa.Wherein, frit composition and content (weight) are: SiO
274.01%, Al
2O
32.82%, CaO 8.78%, and MgO 0.56%, Na
2O 12.38%, K
2O 1.45%.
Embodiment 2: get medical stone powder 65kg, frit 6kg, ground rice 20kg and Semen Maydis powder 9kg, adding 45kg water and 0.4kg concentration is the Na of 40% (weight)
2CO
3Solution, ball milling tailed over less than 0.5% after ball milling disposed slurry fineness is controlled at 320 mesh sieves about 14 hours in ball mill.Place vacuum to remove bubble in slurry, injection forming is made biscuit in gypsum mold, dries.Biscuit is placed the normal pressure firing furnace, and burner hearth is with 1.6 ℃/minute speed elevated temperature to 200 ℃, and the back is increased to 600 ℃ with 2.3 ℃/minute speed, is increased to 700 ℃ with 0.7 ℃/minute speed again.Burner hearth heats biscuit in anoxic destructive distillation mode before 700 ℃, the air that feeds preheating to burner hearth after 700 ℃ is by the burning of the combustiblesubstance in the biscuit, and controlled temperature is increased to 1100 ℃ with 2 ℃/minute speed simultaneously, be incubated 1 hour postcooling down at 1100 ℃, become finished product through post-treatment again.Make the mean pore size 2 μ m of product, maximum diameter of hole 8 μ m, void content 54.3%, filtration velocity 17.3ml/hrcm
2(height of water 200mm) is about folding strength 9.1Mpa.Wherein, frit composition and content (weight) are: SiO
270.48%, Al
2O
35.34%, CaO 8.28%, and MgO 2.07%, Na
2O 10.44%, K
2O 3.39%.
Embodiment 3: batching is formed: aluminum oxide powder 64kg, frit 10kg, flour 20kg and Semen Maydis powder 6kg, add 60kg water, and ball milling tailed over less than 0.5% after ball milling disposed slurry fineness is controlled at 320 mesh sieves about 14 hours in ball mill.Place vacuum to remove bubble in slurry, filter-press dehydration is dried to about water ratio 12% (weight), uses the crushing mill granulation, and biscuit is made in impact briquetting in the hydropress punching block, dries.Biscuit is placed the normal pressure firing furnace, and burner hearth is with 1.2 ℃/minute speed elevated temperature to 200 ℃, and the back is increased to 600 ℃ with 2 ℃/minute speed, is increased to 700 ℃ with 0.9 ℃/minute speed again.Burner hearth heats biscuit in anoxic destructive distillation mode before 700 ℃, the air that feeds preheating to burner hearth after 700 ℃ is by the burning of the combustiblesubstance in the biscuit, and controlled temperature is increased to 1200 ℃ with 2.5 ℃/minute speed simultaneously, be incubated 0.5 hour postcooling down at 1200 ℃, become finished product through post-treatment again.Make product mean pore size 2 μ m, maximum diameter of hole 12 μ m, void content 49.5%, filtration velocity 20ml/hrcm
2(height of water 200mm) is about folding strength 16.4Mpa.Wherein, frit composition and content (weight) are: SiO
267.58%, Al
2O
39.44%, CaO 7.56%, and MgO 1.62%, Na
2O 9.37%, K
2O 4.43%.
Claims (8)
1. the manufacture method of a porous ceramic filter element is characterized in that, may further comprise the steps:
A. preparation is prepared burden: batching is formed and weight percentage is: body material 60～70%, frit 5～12%, cereal starch 20～30%, wherein, body material is silica powder, medical stone powder, aluminum oxide powder, carborundum powder, mullite powder or trichroite powder, and the composition of frit and weight percentage are: SiO
260～80%, Al
2O
31～10%, CaO 2～10%, and MgO 0～5%, Na
2O 5～15%, K
2O 0～5%;
B. add water for ball milling and form slurry: the ratio in batching gross weight 1: 0.4～0.7 adds water, ball milling 10～16 hours;
C. deaeration: place vacuum to remove bubble in the slurry behind the ball milling;
D. sizing material forming is produced biscuit and dry biscuit;
E. calcine biscuit and become finished product by the mode of controlled temperature and control oxygen: calcining biscuit process fire box temperature rising program is: temperature rising speed is 1.1～1.8 ℃/minute between room temperature～200 ℃, temperature rising speed is 1.6～2.7 ℃/minute between 200～600 ℃, temperature rising speed is 0.6～1.1 ℃/minute between 600～700 ℃, speed with 1.3～2.7 ℃/minute more than 700 ℃ is increased to 1000～1200 ℃ of terminal temperatures, is incubated 0.5～1.5 hour under terminal temperature; The mode of control oxygen is: burner hearth adopts anoxic destructive distillation mode to calcine biscuit between room temperature～700 ± 20 ℃, to the burner hearth bubbling air biscuit is carried out oxidizing roasting then.
2. according to the described method of claim 1, it is characterized in that the terminal temperature of described calcination process is 1020～1100 ℃.
3. according to the described method of claim 1, it is characterized in that described moulding process is that to add weight percentage in the ratio of slurry gross weight 0.1～2% in slurry be 45～50% Na
2SiO
3The aqueous solution, weight percentage are 40～45% Na
2CO
3The aqueous solution or weight percentage are 35～40% the NaOH aqueous solution, behind the uniform mixing slurry are cast in the gypsum mold, and the dehydration moulding becomes biscuit.
4. according to the described method of claim 1, it is characterized in that, described moulding process be with slurry drying to weight moisture capacity 10～14%, after crushing mill spreading granulation, in hydropress, become biscuit with the punching block impact briquetting.
5. according to claim 1 or 2 described methods, it is characterized in that, the temperature control program of room temperature～700 ℃ burner hearth is in the described calcining biscuit process: temperature rising speed is 1.2～1.6 ℃/minute between room temperature～200 ℃, temperature rising speed is 1.7～2.3 ℃/minute between 200～600 ℃, and temperature rising speed is 0.7～0.9 ℃/minute between 600～700 ℃.
6. according to claim 1 or 2 described methods, it is characterized in that the temperature increase rate of described calcining biscuit process burner hearth between 700 ℃～terminal temperature is 1.4～2 ℃/minute.
7. according to the described method of claim 1, it is characterized in that the composition of described frit and weight percentage are: SiO
267.5～74.1%, Al
2O
32.8～9.5%, CaO 7.5～8.8%, MgO 0.5～2.1%, Na
2O 9.3～12.4%, K
2O 1.4～4.5%.
8. according to the described method of claim 1, it is characterized in that described cereal starch is one or more in Semen Maydis powder, ground rice, flour, the sorghum flour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03126598 CN1216831C (en) | 2003-05-14 | 2003-05-14 | Making process of porous ceraimc filter element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03126598 CN1216831C (en) | 2003-05-14 | 2003-05-14 | Making process of porous ceraimc filter element |
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| Publication Number | Publication Date |
|---|---|
| CN1548402A CN1548402A (en) | 2004-11-24 |
| CN1216831C true CN1216831C (en) | 2005-08-31 |
Family
ID=34321936
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|---|---|---|---|
| CN 03126598 Expired - Fee Related CN1216831C (en) | 2003-05-14 | 2003-05-14 | Making process of porous ceraimc filter element |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1216831C (en) |
Families Citing this family (22)
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| CN1299797C (en) * | 2004-12-31 | 2007-02-14 | 华南理工大学 | Porous inorganic microstraining core and preparation method thereof |
| CN100334041C (en) * | 2005-06-23 | 2007-08-29 | 华东理工大学 | Porous ceramics preparation method |
| CN100386150C (en) | 2005-08-17 | 2008-05-07 | 云南菲尔特环保科技有限公司 | Carrier of ceramics catalyst, and microparticles collection device of constituting the carrier and their preparation method |
| WO2010069097A1 (en) * | 2008-12-15 | 2010-06-24 | Fong King Leung | Ceramic material for purifying and activating water |
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| CN101786905A (en) * | 2010-03-23 | 2010-07-28 | 咸阳天隆玻璃制品有限公司 | High-aluminum fusion cake for high initial-melting temperature ceramic glaze |
| CN101851112B (en) * | 2010-06-08 | 2012-07-25 | 陕西科技大学 | Preparation method for andesite porous filter ceramic for filtration |
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| CN102643111B (en) * | 2012-05-14 | 2013-09-18 | 刘宗蒲 | Preparation method for porous ceramics |
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| CN103830965B (en) * | 2014-03-03 | 2015-09-09 | 芜湖市宝艺游乐科技设备有限公司 | Toughness reinforcing composite ceramic filter core of a kind of monkey grass and preparation method thereof |
| EP3142987B1 (en) * | 2014-05-15 | 2019-08-28 | Porvair Plc | Boron-free aluminum castshop ceramic foam filter |
| CN105536357A (en) * | 2016-02-01 | 2016-05-04 | 浙江赛亚环保科技有限公司 | Micro-porous ceramic filter plate |
| CN105642021A (en) * | 2016-02-01 | 2016-06-08 | 浙江赛亚环保科技有限公司 | Microporous ceramic filter element |
| CN106315706A (en) * | 2016-08-31 | 2017-01-11 | 朱心江 | Metasilicic acid ball filter element and preparation method thereof |
| CN107857559A (en) * | 2017-11-09 | 2018-03-30 | 平定县冠窑砂器陶艺有限公司 | A kind of sand device water purifier and preparation method thereof |
| CN108147837A (en) * | 2018-02-08 | 2018-06-12 | 福建贝迪陶瓷科技有限公司 | A kind of light porous ceramic filter material and preparation method thereof |
| CN112194477A (en) * | 2019-06-20 | 2021-01-08 | 深圳市合元科技有限公司 | Preparation method of porous ceramic material and porous material obtained by same |
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2003
- 2003-05-14 CN CN 03126598 patent/CN1216831C/en not_active Expired - Fee Related
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| CN1548402A (en) | 2004-11-24 |
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Assignee: Weiye Ceramics Co., Ltd. Assignor: Guangdong Fengxi Ceramics Industry Research Institute Contract fulfillment period: 2008.7.18 to 2014.7.17 Contract record no.: 2009440000646 Denomination of invention: Making process of porous ceraimc filter element Granted publication date: 20050831 License type: Exclusive license Record date: 2009.7.20 |
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Assignee: Meizhou Xinma Ceramic Co.,Ltd. Assignor: Guangdong Fengxi Ceramics Industry Research Institute Contract record no.: 2012440000256 Denomination of invention: Making process of porous ceraimc filter element Granted publication date: 20050831 License type: Exclusive License Open date: 20041124 Record date: 20120525 |
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