CN1065260A - Foamed ceramic filter and manufacture method thereof - Google Patents

Foamed ceramic filter and manufacture method thereof Download PDF

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Publication number
CN1065260A
CN1065260A CN 92102883 CN92102883A CN1065260A CN 1065260 A CN1065260 A CN 1065260A CN 92102883 CN92102883 CN 92102883 CN 92102883 A CN92102883 A CN 92102883A CN 1065260 A CN1065260 A CN 1065260A
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China
Prior art keywords
sio
zro
mixture
strainer
perhaps
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CN 92102883
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CN1054361C (en
Inventor
陈巨乔
邓友仙
樊新淼
冯胜山
陈华兰
蒋枢
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HUBEI PROVINCIAL ELECTROMECHANICAL INST
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HUBEI PROVINCIAL ELECTROMECHANICAL INST
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Priority to CN92102883A priority Critical patent/CN1054361C/en
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00793—Uses not provided for elsewhere in C04B2111/00 as filters or diaphragms
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/0087—Uses not provided for elsewhere in C04B2111/00 for metallurgical applications

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Filtering Materials (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

A kind of foamed ceramic filter and manufacture method thereof are that 70～85% spumescence or vesicular stupalith are made by the front openings porosity.Described stupalith is by (weight percent) Al 2O 360～80%, SiO 220～40%, perhaps Al 2O 390～98%, SiO 22～10%, perhaps Al 2O 370～80%, SiO 25～10%, ZrO 215～20%, perhaps Al 2O 315～30%, ZrO 2At least and at the most one group of composition in 70～85%.Can be used for filtering high melting point liquid metal, steel alloy, cast iron and refractory metal or alloy.

Description

Foamed ceramic filter and manufacture method thereof
The present invention relates to strainer and the manufacture method thereof made with spumescence or vesicular stupalith.This strainer can be used for filtering liquid metal, especially for filtering high melting point metal, steel alloy, cast iron and refractory metal alloy.
In the Metal Melting field, a kind of strainer made from spumescence or vesicular foam ceramic material occurred in recent years, be used for removing the inclusion of metallic solution, so that improve the quality of foundry goods at casting cycle.
Chinese patent 87101800.4 discloses a kind of bubble-like ceramic material strainer and preparation technology and using method of filtering liquid metal.This foam ceramic material contains (weight percent): Al 2O 350～60%, SiO 210～20% and ZrO 220～40%.Its sintering temperature is 1650～1750 ℃.
Because strainer is to work in hot environment, this means that it not only will have the refractoriness that is higher than melting point metal, but also enough high temperature compression strengths and high temperature resistant ballistic ability should be arranged, simultaneously, because of strainer is in the extremely short time, by metallic solution it is heated to the temperature that approaches metallic solution from normal temperature,, promptly under the rapid heat cycle operating mode, did not lose efficacy so require it to have good heat-shock resistance again.
The weak point of above-mentioned patent is: 1, high temperature compression strength and shock resistance are not good enough; 2, during the open porosity when foam carrier lower (being lower than 50%), can not produce the desired open porosity of strainer.
First purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, and provide a kind of foamed ceramic filter and manufacture method thereof, it can not only be worked under the temperature about 1800 ℃, but also has good high-temperature ultimate compression strength, high temperature resistant impact and heat-shock resistance.
Second purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, and provide a kind of foamed ceramic filter and manufacture method thereof, it can produce the higher foamed ceramic filter of open porosity under the lower situation of foam carrier open porosity.
The 3rd purpose of the present invention is to overcome above-mentioned the deficiencies in the prior art, and a kind of foamed ceramic filter and manufacture method thereof are provided, and it has good sintering and comprehensive physicals, reduces sintering temperature and manufacturing cost simultaneously.
The technical solution that realizes the object of the invention is: a kind of foamed ceramic filter, it is characterized in that by the front openings porosity being that 70～85% spumescence or vesicular stupalith are made, and described stupalith is by (weight percent) Al 2O 360～80%, SiO 220～40%, perhaps Al 2O 390～98%, SiO 22～10%, perhaps Al 2O 370～80%, SiO 25～10%, ZrO 215～20%, perhaps Al 2O 315～30%, ZrO 2At least and at the most one group of composition in 70～85%.
The method of making above-mentioned foamed ceramic filter is:
A produces mixture, and its weight ratio is Al 2O 3/ SiO 2=60～80/20～40, or Al 2O 3/ SiO 2=90～98/2～10, or Al 2O 3/ SiO 2/ ZrO 2=70～80/5～10/15～20, or Al 2O 3/ ZrO 2=15～30/70～85, respectively sneaking into (per-cent that accounts for the mixture total weight amount) Y in this mixture respectively 2O 31～5%, a kind of in wilkinite 2～5%, carboxymethyl cellulose 1～3% and phosphoric acid 3～6% or the α starch 1～2%,
B adds water 25～35% by the per-cent of the described mixture total weight amount of preceding article respectively and evenly stirs into slurry,
C is that organic cavernous body of 70～85% is immersed in the above-mentioned arbitrary group of mixture paste with the front openings porosity, extrudes redundant sizing agent subsequently,
D will be stained with blank heating to 200～300 ℃ of mixture paste,
E makes blank sintering-curing under 1500～1650 ℃ of temperature,
The strainer that spumescence that f will make with aforesaid method or vesicular stupalith are processed into desired shape, this operation also can be carried out before sintering-curing.
And, before organic cavernous body be impregnated in mixture paste, earlier open porosity is lower than organic cavernous body of 70% and is placed in 90～100 ℃ of alkaline solutions of 30～40% and floods, remove alkaline solution with the clear water rinsing then, remove its water again.
Can realize purpose of the present invention by the strainer that above-mentioned chemical constitution and method are made.Selecting of its chemical constitution depends primarily under the prerequisite that satisfies the strainer working condition requirement, reduces manufacturing cost as much as possible.Generally speaking, along with Al in each component 2O 3Increase, refractoriness also is improved thereupon, but works as Al 2O 3Content descend to some extent again greater than 90% o'clock thermal shock resistance; SiO 2Though resistance to elevated temperatures not as good as Al 2O 3, but add an amount of SiO 2Can refinement stupalith crystalline structure, improve sintering-curing performance, it is a part and Al when high temperature 2O 3Reaction generates the netted mullite crystal of pin, thereby plays the effect that improves physical strength and chemical stability; ZrO 2The high temperature physicochemical property be better than Al 2O 3, add or suitably strengthen its content and can under the ultrahigh-temperature operating mode, show good physicochemical performance; In order to improve sintering character, improve the comprehensive physicals of strainer, can add an amount of Y by above-mentioned scope 2O 3, can reduce the sintering-solidification value of strainer self like this and (especially work as Al 2O 3When content is higher), play the effect that reduces manufacturing cost; The purpose that adds wilkinite, carboxymethyl cellulose and phosphoric acid (or α starch) is in preparation → sintering curing process, guarantees that mixture paste and even blank all have good cohesive action under normal temperature, the middle gentle condition of high temperature.
Guarantee that foam ceramic material has aforesaid open porosity, can be related to strainer tackle when work effectively, catch the inclusion in the metallic solution, and make the rectification of mobile solution, vortex washing away during with reduction solution flow at high speed to casting mold and core, by above-mentioned preparation method as can be known, the open porosity of foam ceramic material depends on organic cavernous body, as: the open porosity of polyurethane foam plastic, and the open porosity of this polyurethane foam plastic is generally less than 50%, especially the cheaper polyurethane foam plastic of present homemade price, at it by filament in the three-dimensional at random foams of structuring the formation, " hole " that have between its filament is actually thin film, if with this carrier as the dip compound slurry, then the foamed ceramic body that goes out of sintering is obstructed entity at the film place of correspondence.Therefore, when using the lower porous plastics of open porosity to make carrier, it be impregnated in earlier in 90～100 ℃ of alkaline solutions of 30～40%, just can scald effectively and remove the film between filament and do not injure the filament that intensity is higher than film again, thereby produce the higher ceramic foam filter of open porosity with the lower foam carrier of open porosity.
The best proportioning of making the stupalith of strainer is by (weight percent) Al 2O 375～78%, SiO 221～24%, perhaps Al 2O 395～96%, SiO 23～4%, perhaps Al 2O 374～76%, SiO 27～8%, ZrO 215～17%, perhaps Al 2O 320～25%, ZrO 2At least and at the most one group of composition in 74～79%, each is organized in the chemical constitution, and impurity generally is not more than 1%.
Strainer by technical scheme manufacturing of the present invention, through checking its refractoriness to be: 1650～1800 ℃ of (test basis: DIN51730), normal temperature ultimate compression strength is 2.0～6.5MPa(test basis: GB1448-83), high temperature (1000 ℃) ultimate compression strength is: 1～3MPa, heat-shock resistance (rapid heat cycle between 20～1000 ℃ changes): be no less than 30 times, the front openings porosity is: 70～85%.Every strainer (standard type: 100 * 100 * 22mm 3) manufacturing cost be 1/3rd of prior art.Use in addition and show through reality: this strainer effectively in the filtering metallic solution size be inclusion more than the 5 μ m.
The invention will be further described below with reference to embodiment:
Composition is weight percentage in following each embodiment mixture.The granularity of mixture powder is 200～320 orders.
Embodiment 1 Al 2O 360%, SiO 239.5%, all the other are impurity.
Embodiment 2 Al 2O 369.5%, SiO 230%, all the other are impurity.
Embodiment 3 Al 2O 379.5%, SiO 220%, all the other are impurity.
The gross weight of pressing said mixture adds Y 2O 31～5%, wilkinite 2～5%, carboxymethyl cellulose 1～3% and phosphoric acid 3～6%(or α starch 1～2%);
Add water 25～35% by the gross weight of said mixture and evenly stir into slurry;
With the front openings porosity is that organic cavernous body of 70～85% is immersed in the above-mentioned arbitrary group of mixture paste, extrudes redundant sizing agent subsequently;
To be stained with blank heating to 200～300 ℃ of slurry with infrared heating oven, make the foam carrier gasification, i.e. blank typing;
1500～1650 ℃ of sintering temperatures 1～6 hour, blank is solidified;
Spumescence or vesicular stupalith are processed into the strainer of desired shape, as: square, rectangle, circle and conical.This operation also can be carried out before sintering-curing.
In addition, if the front openings porosity of organic cavernous body is lower than 70%, can be before organic cavernous body be impregnated in mixture paste, it was flooded 2～20 minutes in 90～100 ℃ of alkaline solutions of 30～40%, alkaline solution is removed in rinsing in clear water then, remove its water again, so that make organic cavernous body reach desired open porosity.
Performance of making that strainer had and characteristic (effect) are as described in the 6th part.
Embodiment 4 Al 2O 390%, SiO 29.6%, all the other are impurity.
Embodiment 5 Al 2O 394%, SiO 25.5%, all the other are impurity.
Embodiment 6 Al 2O 397.5%, SiO 22%, all the other are impurity.
Adopt as embodiment 1～3 described manufacture method simultaneously, strainer is obtained as described performance of the 6th part and characteristic.
Embodiment 7 Al 2O 370%, SiO 210%, ZrO 219.5%, all the other are impurity.
Embodiment 8 Al 2O 375%, SiO 27.5%, ZrO 217%, all the other are impurity.
Embodiment 9 Al 2O 379.5%, SiO 25%, ZrO 215%, all the other are impurity.
Adopt as embodiment 1～3 described manufacture method simultaneously, strainer is obtained as described performance of the 6th part and characteristic.
Embodiment 10 Al 2O 315%, ZrO 284.5%, all the other are impurity.
Embodiment 11 Al 2O 322%, ZrO 277.5%, all the other are impurity.
Embodiment 12 Al 2O 384.3%, ZrO 215.2%, all the other are impurity.
Adopt as embodiment 1～3 described manufacture method simultaneously, strainer is obtained as described performance of the 6th part and characteristic.

Claims (3)

1, a kind of foamed ceramic filter is characterized in that by the front openings porosity being that 70～85% spumescence or vesicular stupalith are made, and described stupalith is by (weight percent) Al 2O 360～80%, SiO 220～40%, perhaps Al 2O 390～98%, SiO 22～10%, perhaps Al 2O 370～80%, SiO 25～10%, ZrO 215～20%, perhaps Al 2O 315～30%, ZrO 2At least and at the most one group of composition in 70～85%.
2, a kind of method of making the described strainer of claim 1 is characterized in that:
A, produce mixture, its weight ratio is Al 2O 3/ SiO 2=60～80/20～40; Or Al 2O 3/ SiO 2=90～98/2～10, or Al 2O 3/ SiO 2/ ZrO 2=70～80/5～10/15～20, or Al 2O 3/ ZrO 2=15～30/70～85, respectively sneaking into (per-cent that accounts for the mixture total weight amount) Y in this mixture respectively 2O 31～5%, a kind of in wilkinite 2～5%, carboxymethyl cellulose 1～3% and phosphoric acid 3～6% or the α starch 1～2%,
B adds water 25～35% by the per-cent of the described mixture total weight amount of preceding article respectively and evenly stirs into slurry,
C is that organic cavernous body of 70～85% is immersed in the above-mentioned arbitrary group of mixture paste with the front openings porosity, extrudes redundant sizing agent subsequently,
D will be stained with blank heating to 200～300 ℃ of mixture paste,
E makes blank sintering-curing under 1500～1650 ℃ of temperature,
The strainer that spumescence that f will make with aforesaid method or vesicular stupalith are processed into desired shape, this operation also can be carried out before sintering-curing.
3, the method for manufacturing strainer according to claim 2, organic cavernous body it is characterized in that: before be impregnated in mixture paste, earlier open porosity being lower than organic cavernous body of 70% is placed in 90～100 ℃ of alkaline solutions of 30～40% and floods, remove alkaline solution with the clear water rinsing then, remove its water again.
CN92102883A 1992-04-18 1992-04-18 Foamed ceramic filter and its manufacture Expired - Fee Related CN1054361C (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1063411C (en) * 1996-10-30 2001-03-21 大连理工大学 Method of preparing (ALxOx+Tibx) foamed ceramic filter by self-overgrowth high-temp. synthesis control
CN1063410C (en) * 1996-10-30 2001-03-21 大连理工大学 Method of preparing foamed ceramic material by self-overgrowth high-temp. synthesis control
CN101328074B (en) * 2007-06-22 2010-08-11 宝山钢铁股份有限公司 Ceramic particle adhesive, preparation thereof and method for preparing ceramic particle using the same
CN103030419A (en) * 2012-12-08 2013-04-10 佛山市简氏依立电器有限公司 Preparation method of purple sand foamed water filtering ceramic
CN105837241A (en) * 2015-01-16 2016-08-10 济南圣泉倍进陶瓷过滤器有限公司 Foam ceramic filter for cast steel and high temperature alloy and manufacturing method thereof
CN110449035A (en) * 2019-08-20 2019-11-15 广东工业大学 A kind of water-oil separationg film and preparation method thereof
CN110746179A (en) * 2019-11-18 2020-02-04 齐鲁工业大学 Alumina ceramic impregnated sucrose material with adjustable negative dielectric constant and preparation method thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101186490B (en) * 2007-12-07 2010-10-06 煤炭科学研究总院重庆研究院 Porous inert material and application thereof in thermal conduction element
CN101659543B (en) * 2009-09-11 2013-02-20 金建福 Zirconium-contained compound sintered ultralight inorganic material and preparation method thereof

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN85102359A (en) * 1985-04-01 1986-09-17 陕西机械学院 Special foamy ceramic filter for casting production
FR2599990B1 (en) * 1986-03-19 1993-03-26 Ceramiques Composites FILTER FOR LIQUID METALS BASED ON ALVEOLAR CERAMIC MATERIAL, ITS PREPARATION METHOD AND ITS APPLICATION TO THE FILTRATION OF METALS OR LIQUID ALLOYS OF VERY HIGH MELTING POINT
GB8912896D0 (en) * 1988-06-22 1989-07-26 Ici Plc Polymeric films

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1063411C (en) * 1996-10-30 2001-03-21 大连理工大学 Method of preparing (ALxOx+Tibx) foamed ceramic filter by self-overgrowth high-temp. synthesis control
CN1063410C (en) * 1996-10-30 2001-03-21 大连理工大学 Method of preparing foamed ceramic material by self-overgrowth high-temp. synthesis control
CN101328074B (en) * 2007-06-22 2010-08-11 宝山钢铁股份有限公司 Ceramic particle adhesive, preparation thereof and method for preparing ceramic particle using the same
CN103030419A (en) * 2012-12-08 2013-04-10 佛山市简氏依立电器有限公司 Preparation method of purple sand foamed water filtering ceramic
CN103030419B (en) * 2012-12-08 2014-10-08 佛山市简氏依立电器有限公司 Preparation method of purple sand foamed water filtering ceramic
CN105837241A (en) * 2015-01-16 2016-08-10 济南圣泉倍进陶瓷过滤器有限公司 Foam ceramic filter for cast steel and high temperature alloy and manufacturing method thereof
CN105837241B (en) * 2015-01-16 2018-12-14 济南圣泉倍进陶瓷过滤器有限公司 Cast steel and high temperature alloy ceramic foam filter and its manufacturing method
CN110449035A (en) * 2019-08-20 2019-11-15 广东工业大学 A kind of water-oil separationg film and preparation method thereof
CN110449035B (en) * 2019-08-20 2022-05-10 广东工业大学 Oil-water separation membrane and preparation method thereof
CN110746179A (en) * 2019-11-18 2020-02-04 齐鲁工业大学 Alumina ceramic impregnated sucrose material with adjustable negative dielectric constant and preparation method thereof

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