CN104926354A - Honeycomb ceramic filter used for purifying and filtering molten metal liquid - Google Patents
Honeycomb ceramic filter used for purifying and filtering molten metal liquid Download PDFInfo
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- CN104926354A CN104926354A CN201510330881.8A CN201510330881A CN104926354A CN 104926354 A CN104926354 A CN 104926354A CN 201510330881 A CN201510330881 A CN 201510330881A CN 104926354 A CN104926354 A CN 104926354A
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Abstract
The invention relates to a honeycomb ceramic filter used for purifying and filtering molten metal liquid and a manufacturing method thereof. The manufacturing method is characterized by including the steps that andalusite, kaolin, superfine silicon dioxide, aluminum oxide, talc and titanium dioxide compose ceramic powder, then binding agents composed of glue, glycerol, deionized water and cellulose are added into the ceramic powder to form plasticity pug, and the honeycomb ceramic filter is manufactured through mixing, primary milling, fine milling, aging, vacuum pugging, forming, drying and high-temperature sintering. The honeycomb ceramic filter manufactured with the method is good in high-temperature strength and thermal shock resistance and has the advantages of being low in cost, easy to operate and suitable for industrial production.
Description
Technical field
The present invention relates to the ceramic honeycomb filter of the purification filtering for molten metal liquid, be particularly a ceramic honeycomb filter for ceramic main ingredient containing andaluzite, kaolin, superfine silicon dioxide, aluminum oxide, talcum and titanium dioxide, belong to the filtering and cleaning technique field of molten metal liquid.
The invention still further relates to the preparation method of this ceramic honeycomb filter.
Background technology
In the melting and casting process of various metal liquid alloy, the casting wasted product rate caused due to casting flaws such as non-metallic inclusion and contracting pores is generally up to 50 ~ 60% of waste product sum.Inclusion defect not only seriously reduces mechanical property and the castability of foundry goods, also to machining and the outward appearance generation harmful effect of foundry goods.Purify liquid casting alloy, reduce or eliminate the exhaust of wherein each kind of non-metallic inclusion, obtain the important technique measure of high quality casting beyond doubt.
Filtering technique is applied to the history that Foundry Production has decades, but is only insert in gating system with the simple strainer such as wire netting, steel plate with holes, porous loam core to carry out filtering bulk inclusion at first.From nineteen sixties, there is the two-dimensional structure type filtering nets such as aluminum silicate fiber matter, molybdenum filament matter, boron nitride fibre matter successively in Russia, American and Britain, medium country, and be applied aborning, achieved certain effect.But all these filtering nets can only by the bulk inclusion in mechanical grading effect filtering molten metal and the little inclusion of only a few.Due to the refractoriness of aluminum silicate fiber filtering net and intensity all lower, the filtration of non-ferrous alloy, cast iron and small casting steel can only be used for, be difficult to the impact of bearing hot metal fluid for a long time; Though the boron nitride fibre filtering net of the molybdenum filament matter of Britain's development and U.S.'s development can be used for filtering the superalloys such as cast steel, because it is expensive, make it apply and be restricted.The ceramic honeycomb filter that the early eighties U.S. succeeds in developing at first solves refractory particle strainer leakiness grain and inconvenient problem with use.
Ceramic honey comb straight hole strainer is for improving the quality of foundry goods, high-quality high-density straight hole mesh, product is made to have the characteristic of very high heat shock resistance and resistance to high fever casting temperature, straight hole type design ensure that the balance between fluence and intensity, effectively remove impurity and slag particle etc., foundry goods mechanical property, surface quality and conforming product rate are improved greatly.Ceramic honey comb straight hole strainer, has natural chemisorption (affine) ability to oxide compound, and the impurity (comprising the particulate being less than hole dimension) on the inwall in hole in adsorbing metal liquid, improves filter effect.Advanced extruding type production technique, make porcelain filter have the design of unique squares and triangles, its increases the contact area with pottery, improves the ability of strainer absorption and seizure fine impurities, better than non-extruding type metre filter effect, molten metal flowing steadily.Improve pouring speed and continuity; Reduce casting wasted product rate; Improve foundry goods mechanical property, increase the service life.Ceramic honey comb straight hole strainer obtains following effect by type inner filtration is desirable:
1. purifying molten metal, removes nonmetallic impurity and gas;
2. make liquid metal filling steady, reduce vortex;
3. simplify gating system, improve product yield;
4. reduce bleb, optimize fining metal tissue;
5. improve surface quality of continuous castings and mechanical property;
6. reduce casting wasted product rate; Reduce process redundancy and improve cutter life, reducing casting cost.
Ceramic honeycomb filter adopts strict batch formula, carries out ball milling to powder, adds binding agent, and sintering aid etc. carry out stirrings kneading, through Wetted constructures, pugging process, extrusion molding, shapes, cuts base high temperature sintering and form.
The profile that the ceramic honeycomb filter of current production has is irregular, and some use temperatures are low, and mostly thermal shock resistance is poor, in use easily break, and causes secondary slag inclusion.
Summary of the invention
Object of the present invention overcomes shortcoming that above-mentioned prior art exists just with not enough and provide a kind of product use temperature of profile rule high, and strainability is good, the ceramic honeycomb filter of good thermal shock, thus can improve the quality of products and yield rate.
The object of the invention is to be realized by following technical proposal:
For a ceramic honeycomb filter for molten metal liquid filtration, purification, it is made up of ceramic powder and binding agent, and ceramic powder and its weight proportion of binding agent are 70 ~ 75:25 ~ 30,
Described ceramic powder is made up of the raw material of following weight proportioning:
Andaluzite 40 ~ 74 parts
Kaolin 5 ~ 15 parts
Superfine silicon dioxide 3 ~ 10 parts
5 ~ 15 parts, aluminum oxide
10 ~ 15 parts, talcum
Titanium dioxide 3 ~ 5 parts
Described binding agent is made up of the raw material of following weight proportioning:
5 ~ 10 parts, glue
Glycerine 3 ~ 7 parts
Deionized water 5 ~ 10 parts
Mierocrystalline cellulose 3 ~ 5 parts.
The each raw material granularity of described ceramic powder is: andaluzite 200 ~ 400 order, kaolin 600 ~ 1250 order, superfine silicon dioxide 1250 order, 2 ~ 6 μm, aluminum oxide, talcum 600 ~ 1250 order, titanium dioxide≤2 μm, described ceramic honeycomb filter have uniform in logical straight hole.
The preparation method of described ceramic honeycomb filter, is characterized in that, it carries out in the steps below:
A) 200 ~ 400 object 40 ~ 74 weight (lower with) part andaluzite, 600 ~ 1250 object, 5 ~ 15 parts of kaolin, 1250 object, 3 ~ 10 parts of superfine silicon dioxides, 5 ~ 15 parts of aluminum oxide of 2 ~ 6 μm, 3 ~ 5 parts of titanium dioxides of 600 ~ 1250 object, 10 ~ 15 parts of talcums and≤2 μm are dry mixed 0.5 ~ 1.0 hour in mixer, then cross 100 eye mesh screens, under sieve, obtain ceramic powder;
B) again 5 ~ 10 parts of glue, 3 ~ 7 parts of glycerine, 5 ~ 10 parts of deionized waters and 3 ~ 5 parts of Mierocrystalline cellulose mixing are stirred kneading 1 ~ 1.5 hour with the ceramic powder of (a) item in kneader, practice into plasticity-pug, ceramic powder and its weight proportion of binding agent are 70 ~ 75:25 ~ 30, again through pug mill first white silk, concise after Installed enter to carry out old in airtight old frame, obtain old good pug;
C) old good pug is filtered pug in the pre-filtering pug mill that 60 eye mesh screens are housed, in vacuum tightness≤-0.09, MPa pug mill is extruded into cylindric segment, then segmentation is put into single-lead-screw extruding briquetting machine and extruded growth section youngster shape wet hair base;
D) again wet hair base at microwave oven dryness finalization, then in drying room, dry sclerosis in 24 hours in 100 ~ 110 DEG C, dried blank is thinly sliced youngster's shape by thickness requirement, in processing, logical straight hole, becomes complete ceramic honey comb base substrate;
E) the complete ceramic honey comb base substrate of processing is loaded sintering oven, be warming up to 1300 ~ 1450 DEG C of high temperature sinterings, obtain ceramic honeycomb filter.
Described high temperature sintering is warming up to 550 DEG C of low temperature binder removals with the heat-up rate of 60 DEG C/h, after to be bonded dose of volatilization, be rapidly heated to 1200 DEG C with the heat-up rate of 200 DEG C/h again, then be warming up to the sintering temperature of 1300 ~ 1450 DEG C with the heat-up rate of 40 DEG C/h, and be incubated 4 ~ 8h at this temperature.
The raw material that the present invention adopts is ceramic powder and binding agent, andaluzite in ceramic powder, kaolin, superfine silicon dioxide, aluminum oxide, talcum and titanium dioxide, andaluzite, for aggregate, another name " chrysanthemum stone, outer literary fame Andalusite, it is a kind of aluminium silicate mineral, it is the raw material manufacturing refractory materials in sparking plug and porcelain, it is high that andaluzite at high temperature can be converted into refractoriness, the mullite that mechanical behavior under high temperature is good, therefore, mullite synthesizing and goods thereof have density and purity is higher, thermal structure intensity is high, high temperature creep rate is low, coefficient of thermal expansion is little, resistance to chemical attack is strong, good thermal shock, and andaluzite is at high temperature attended by the volumetric expansion of 3 ~ 5% while crystal transition, this just in time can offset the volumetric shrinkage of goods in sintering process make product size change little, and it is not easy to crack, the present invention take andaluzite as aggregate, select can the starting material of synthesis of dichroite simultaneously, as their base portion, make base portion synthesis of dichroite phase, form mullite bonded cordierite crystalline phase, utilize the high thermostability of low thermal coefficient of expansion matrix and high thermal expansion coefficient aggregate, improve the heat-shock resistance of product.Add a small amount of titanium dioxide sintering agent, can under Low Temperature Solid-Phase condition acceleration of sintering, reduce the formation of liquid matrix, be conducive to improving goods use temperature and improving heat-shock resistance.
Kaolin, another name china clay, carclazyte, white clay, potter's clay, pavilion soil powder, outer literary fame kaolin-chemical formula Al2032Si022H20, has the physico-chemical properties such as good plasticity-and resistivity against fire.Can improve plasticity of slurry, superfine silicon dioxide, for filling space, forms matrix, improve density, the matrix that aluminum oxide and other material Heat of Formation pinkings are good, raising thermal shock resistance, talcum: generate matrix with Suzhou soil, aluminum oxide, improve heat-shock resistance, aluminum oxide: form matrix with talcum, Suzhou soil, improve heat-shock resistance, titanium dioxide: add titanium dioxide sintering agent, can promote that product sinters under Low Temperature Solid-Phase, thus can sintering temperature be reduced, improve the use temperature of product.
The glue of binding agent can increase blank intensity, glycerine lubricate, and Mierocrystalline cellulose can water conservation, binding agent can improve plasticity, slip, the water-retentivity of pug, enters and fully stirs and repeatedly after pugging, can make pug stable homogeneous, shapingly to be more prone to, to decrease scrap rate.
Owing to taking technique scheme, the technology of the present invention tool is had the following advantages and effect:
A () ceramic honeycomb filter of the present invention has normal temperature strength high, strong, the adsorbable trickle slag of stable chemical nature, anti-metal hydraulic shock power, product size precision are high, filter effect is obviously better than fibrous filter net, compared with ceramic foam filter, its high-precision size is more suitable for the production line laying strainer for automatic mechanical hand.And can Filtration Adsorption fine impurity, molten metal flow rate is stablized, and normal temperature strength height also has clear superiority;
B () starting material are easy to get, preparation method's science, and product cost is low, and quality is good.
Embodiment
Embodiment 1
Get 200 object 40kg andaluzites, 600 object 15kg kaolin, 1250 object 3kg superfine silicon dioxides, the 15kg aluminum oxide of 2 μm, the 5kg titanium dioxide of 1250 object 10kg talcums and≤2 μm is dry mixed 0.5 hour in mixer, then 100 eye mesh screens are crossed, ceramic powder is obtained under sieve, get 5kg glue again, 7kg glycerine, 10kg deionized water and 3kg Mierocrystalline cellulose are mixed with binding agent, get ceramic powder 70kg, binding agent 30kg stirs kneading 1 hour in kneader, practice into plasticity-pug, again through the first white silk of pug mill, after concise, Installed enter carry out in airtight old frame old, obtain old good pug, pug is filtered in the pre-filtering pug mill that 60 eye mesh screens are housed, in vacuum tightness≤-0.09, MPa pug mill is extruded into cylindric segment, segmentation is put into single-lead-screw extruding briquetting machine and is extruded growth section youngster shape wet hair base at microwave oven dryness finalization again, then in drying room, sclerosis in 24 hours is dried in 100 DEG C, dried blank is thinly sliced youngster's shape by thickness requirement, logical straight hole in processing, become complete ceramic honey comb base substrate, load sintering oven, 550 DEG C of low temperature binder removals are warming up to the heat-up rate of 60 DEG C/h, after to be bonded dose of volatilization, be rapidly heated to 1200 DEG C with the heat-up rate of 200 DEG C/h again, the sintering temperature of 1300 DEG C is warming up to again with the heat-up rate of 40 DEG C/h, and be incubated 8h at this temperature, obtain ceramic honeycomb filter.
Embodiment 2
Get 320 object 60kg andaluzites, 900 object 10kg kaolin, 1250 object 7kg superfine silicon dioxides, the 10kg aluminum oxide of 3 μm, the 4kg titanium dioxide of 800 object 12kg talcums and≤2 μm is dry mixed 0.8 hour in mixer, then 100 eye mesh screens are crossed, ceramic powder is obtained under sieve, get 7kg glue again, 6kg glycerine, 7kg deionized water and 4kg Mierocrystalline cellulose are mixed with binding agent, get ceramic powder 73kg binding agent 27kg and in kneader, stir kneading 1.2 hours, practice into plasticity-pug, again through the first white silk of pug mill, after concise, Installed enter carry out in airtight old frame old, obtain old good pug, pug is filtered in the pre-filtering pug mill that 60 eye mesh screens are housed, in vacuum tightness≤-0.09, MPa pug mill is extruded into cylindric segment, segmentation is put into single-lead-screw extruding briquetting machine and is extruded growth section youngster shape wet hair base at microwave oven dryness finalization again, then in drying room, sclerosis in 24 hours is dried in 105 DEG C, dried blank is thinly sliced youngster's shape by thickness requirement, logical straight hole in processing, become complete ceramic honey comb base substrate, load sintering oven, 550 DEG C of low temperature binder removals are warming up to the heat-up rate of 60 DEG C/h, after to be bonded dose of volatilization, be rapidly heated to 1200 DEG C with the heat-up rate of 200 DEG C/h again, the sintering temperature of 1350 DEG C is warming up to again with the heat-up rate of 40 DEG C/h, and be incubated 6h at this temperature, obtain ceramic honeycomb filter.
Embodiment 3
Get 400 object 74kg andaluzites, 1250 object 5kg kaolin, 1250 object 10kg superfine silicon dioxides, the 5kg aluminum oxide of 6 μm, the 3kg titanium dioxide of 600 object 15kg talcums and≤2 μm is dry mixed 1.0 hours in mixer, then 100 eye mesh screens are crossed, ceramic powder is obtained under sieve, get 10kg glue again, 3kg glycerine, 5kg deionized water and 5kg Mierocrystalline cellulose are mixed with binding agent, get ceramic powder 75kg binding agent 25kg and in kneader, stir kneading 1.5 hours, practice into plasticity-pug, again through the first white silk of pug mill, after concise, Installed enter carry out in airtight old frame old, obtain old good pug, pug is filtered in the pre-filtering pug mill that 60 eye mesh screens are housed, in vacuum tightness≤-0.09, MPa pug mill is extruded into cylindric segment, segmentation is put into single-lead-screw extruding briquetting machine and is extruded growth section youngster shape wet hair base at microwave oven dryness finalization again, then in drying room, sclerosis in 24 hours is dried in 110 DEG C, dried blank is thinly sliced youngster's shape by thickness requirement, logical straight hole in processing, become complete ceramic honey comb base substrate, load sintering oven, 550 DEG C of low temperature binder removals are warming up to the heat-up rate of 60 DEG C/h, after to be bonded dose of volatilization, be rapidly heated to 1200 DEG C with the heat-up rate of 200 DEG C/h again, the sintering temperature of 1450 DEG C is warming up to again with the heat-up rate of 40 DEG C/h, and be incubated 4h at this temperature, obtain ceramic honeycomb filter.
Claims (5)
1. for a ceramic honeycomb filter for molten metal liquid filtration, purification, it is characterized in that: it is made up of ceramic powder and binding agent, ceramic powder and its weight proportion of binding agent are 70 ~ 75:25 ~ 30;
Described ceramic powder is made up of the raw material of following weight proportioning:
Andaluzite 40 ~ 74 parts
Kaolin 5 ~ 15 parts
Superfine silicon dioxide 3 ~ 10 parts
5 ~ 15 parts, aluminum oxide
10 ~ 15 parts, talcum
Titanium dioxide 3 ~ 5 parts,
Described binding agent is made up of the raw material of following weight proportioning:
5 ~ 10 parts, glue
Glycerine 3 ~ 7 parts
Deionized water 5 ~ 10 parts
Mierocrystalline cellulose 3 ~ 5 parts.
2. Cordierite-mullite honeycomb ceramic heat accumulator according to claim 1, it is levied and is: each raw material granularity of described ceramic powder is: andaluzite 200 ~ 400 order, kaolin 600 ~ 1250 order, superfine silicon dioxide 1250 order, 2 ~ 6 μm, aluminum oxide, talcum 600 ~ 1250 order, titanium dioxide≤2 μm.
3. ceramic honeycomb filter according to claim 1, is characterized in that: described ceramic honeycomb filter have uniform in logical straight hole.
4. the preparation method of ceramic honeycomb filter as claimed in claim 1 or 2, it is characterized in that, it carries out in the steps below:
A) 200 ~ 400 object 40 ~ 74 weight (lower with) part andaluzite, 600 ~ 1250 object, 5 ~ 15 parts of kaolin, 1250 object, 3 ~ 10 parts of superfine silicon dioxides, 5 ~ 15 parts of aluminum oxide of 2 ~ 6 μm, 3 ~ 5 parts of titanium dioxides of 600 ~ 1250 object, 10 ~ 15 parts of talcums and≤2 μm are dry mixed 0.5 ~ 1.0 hour in mixer, then cross 100 eye mesh screens, under sieve, obtain ceramic powder;
B) again 5 ~ 10 parts of glue, 3 ~ 7 parts of glycerine, 5 ~ 10 parts of deionized waters and 3 ~ 5 parts of Mierocrystalline cellulose mixing are stirred kneading 1 ~ 1.5 hour with the ceramic powder of (a) item in kneader, practice into plasticity-pug, ceramic powder and its weight proportion of binding agent are 70 ~ 75:25 ~ 30, again through pug mill first white silk, concise after Installed enter to carry out old in airtight old frame, obtain old good pug;
C) old good pug is filtered pug in the pre-filtering pug mill that 60 eye mesh screens are housed, in vacuum tightness≤-0.09, MPa pug mill is extruded into cylindric segment, then segmentation is put into single-lead-screw extruding briquetting machine and extruded growth section youngster shape wet hair base;
D) again wet hair base at microwave oven dryness finalization, then in drying room, dry sclerosis in 24 hours in 100 ~ 110 DEG C, dried blank is thinly sliced youngster's shape by thickness requirement, in processing, logical straight hole, becomes complete ceramic honey comb base substrate;
E) the complete ceramic honey comb base substrate of processing is loaded sintering oven, be warming up to 1300 ~ 1450 DEG C of high temperature sinterings, obtain ceramic honeycomb filter.
5. the preparation method of the ceramic honeycomb filter described in 4 is wanted according to right, it is characterized in that described high temperature sintering is warming up to 550 DEG C of low temperature binder removals with the heat-up rate of 60 DEG C/h, after to be bonded dose of volatilization, be rapidly heated to 1200 DEG C with the heat-up rate of 200 DEG C/h again, be warming up to the sintering temperature of 1300 ~ 1450 DEG C again with the heat-up rate of 40 DEG C/h, and be incubated 4 ~ 8h at this temperature.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109053218A (en) * | 2018-10-18 | 2018-12-21 | 江西鸿司远特种泡沫材料有限公司 | A kind of sewage treatment ceramic foam filter and preparation method thereof |
| CN110540409A (en) * | 2018-05-29 | 2019-12-06 | 山东工业陶瓷研究设计院有限公司 | Powder of alumina ceramic part and preparation method thereof |
| CN114920541A (en) * | 2022-05-28 | 2022-08-19 | 河北浩锐陶瓷制品有限公司 | High-wear-resistance ceramic material for ceramic tiles, preparation method of high-wear-resistance ceramic material and high-wear-resistance ceramic tiles |
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| CN101857447A (en) * | 2010-06-01 | 2010-10-13 | 刘光文 | Andalusite honeycomb heat accumulator and preparation method |
| CN102137828A (en) * | 2008-08-01 | 2011-07-27 | 康宁股份有限公司 | Ceramic precursor having improved manufacturability |
| CN102320841A (en) * | 2011-06-14 | 2012-01-18 | 武汉理工大学 | Method for preparing honeycomb ceramic cast filter sheet from andalusite |
| CN102910930A (en) * | 2011-08-04 | 2013-02-06 | 晋城市富基新材料股份有限公司 | Honeycomb ceramic filter and preparation method thereof |
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2015
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Patent Citations (4)
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| CN102137828A (en) * | 2008-08-01 | 2011-07-27 | 康宁股份有限公司 | Ceramic precursor having improved manufacturability |
| CN101857447A (en) * | 2010-06-01 | 2010-10-13 | 刘光文 | Andalusite honeycomb heat accumulator and preparation method |
| CN102320841A (en) * | 2011-06-14 | 2012-01-18 | 武汉理工大学 | Method for preparing honeycomb ceramic cast filter sheet from andalusite |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110540409A (en) * | 2018-05-29 | 2019-12-06 | 山东工业陶瓷研究设计院有限公司 | Powder of alumina ceramic part and preparation method thereof |
| CN110540409B (en) * | 2018-05-29 | 2022-02-01 | 山东工业陶瓷研究设计院有限公司 | Powder of alumina ceramic part and preparation method thereof |
| CN109053218A (en) * | 2018-10-18 | 2018-12-21 | 江西鸿司远特种泡沫材料有限公司 | A kind of sewage treatment ceramic foam filter and preparation method thereof |
| CN114920541A (en) * | 2022-05-28 | 2022-08-19 | 河北浩锐陶瓷制品有限公司 | High-wear-resistance ceramic material for ceramic tiles, preparation method of high-wear-resistance ceramic material and high-wear-resistance ceramic tiles |
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Application publication date: 20150923 |