CN102989235B - Filter for filtering molten metals and manufacturing method thereof - Google Patents
Filter for filtering molten metals and manufacturing method thereof Download PDFInfo
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- CN102989235B CN102989235B CN201210573675.6A CN201210573675A CN102989235B CN 102989235 B CN102989235 B CN 102989235B CN 201210573675 A CN201210573675 A CN 201210573675A CN 102989235 B CN102989235 B CN 102989235B
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Abstract
The invention relates to a foam filter for filtering molten metals. The foam filter comprises bonding materials and ceramic materials bonded together by the bonding materials, wherein the bonding materials comprise carbon substrates connected with network-shaped carbon; and part of the ceramic materials is spherical granular materials. The foam filter has the beneficial effects that the thermal shock resistance and high-temperature impact resistance of the molten metal filter are unexpectedly improved by introducing part of the ceramic materials in the form of spherical granules; in other aspects, the thermal shock resistance and compressive strength are further improved by optimizing formulas, grain sizes and the like; in particular, not only is the cost reduced but also the specific heat capacity of the product is reduced by introducing the high-proportion carbon component to the product; and the filter is easy to start for filtration and does not cause crystallization of the molten metals during starting easily.
Description
Technical field
The present invention relates to the manufacture field of filter, more particularly, relate to a kind of filter for filtering molten metal and manufacture method thereof.
Background technology
The purification of molten metal plays an important role to the mechanical property improving foundry goods.Filter at present for molten metal purification is ceramic filter, can effectively intercept and capture the objectionable impurities in molten metal and make molten metal become laminar flow from turbulent flow, plays purification and homogeneous effect.Ceramic filter can be divided into ceramic foam filter and straight-bore ceramic filter according to structure.Filter at present for cast steel is all almost ceramic foam filter.In the middle of all motlten metal foam filters, the requirement for cast steel foam filter is the highest, and this is because cast steel motlten metal has higher melt temperature.At this temperature, filter needs to keep enough mechanical strength, thermal shock resistance and lower specific heat capacities.Wherein, the factor affecting thermal shock resistance comprises the thermal coefficient of expansion of material, thermal conductivity factor, material inherent strength, fracture toughness etc.Generally speaking, thermal coefficient of expansion is less, and the Volume Changes that material causes because of variations in temperature is little, and the temperature stress of corresponding generation is little, and thermal shock resistance is better; Thermal conductivity is large, and the temperature difference of material internal is less, and the stress difference caused by the temperature difference is less, and thermal shock resistance is better; Material inherent strength is higher, bears thermal stress and the intensity of unlikely destruction is larger, good thermal shock.For ceramic material, the internal organizational structure of material and geometry are also influence factors.Generally speaking, material structure is relatively loose, has certain porosity, has suitable micro-crack to exist, can improve energy to failure, makes material unlikely destroyed under thermal shock.But material structure is relatively loose, also can reduce the mechanical strength of material, therefore between the mechanical strength and thermal shock resistance of filter, easily there is contradiction.
The preparation of traditional foam filter for cast steel depends on zirconia.Such as namely CN200710139288.0 discloses a kind of Zirconium oxide foam ceramic filter.This is because zirconia has high mechanical strength, even if adopt the foaming structure of porous, also good mechanical performance can be kept, but, because zirconium is a kind of rare metal, although good filtration effect, its fancy price seriously limits its extensive use in cast steel and other high-temperature liquid metal filtration art, just for special steel or the steel of high added value or the casting of alloy.
CN201010511259.4 relates to a kind of yttria foamed ceramic filter and preparation method thereof, the same with zirconium oxide filter, and its high cost uses producer to be difficult to accept.
CN1449312A discloses a kind of filter for filtering molten metal, and filter comprises open cell porous material, and this material contains the refractory particles together with the adhesive bonds containing carbon structure.This invention requires the firing atmosphere of controlling filter, to control quality and the level of carbon-to-carbon bonding, namely when burning till beginning, air is injected in combustion chamber, then the reasonable level injected to ensure burning indoor oxygen is stopped, this method is difficult to control in production, easily causes the instability of product quality.In addition, if do not use zirconium in refractory material, there will be larger contraction in burning till, the mechanical strength of product can reduce, and can not produce large filter, and in burning till, have larger oxidation.In addition, according to the preparation method of this patent, for meeting the filtration needs of cast steel liquid, also must adopt zirconia, adopt other raw materials as ceramic material, the mechanical performance of obtained filter can not get requirement.
Summary of the invention
The object of the invention is the new technical scheme proposing a kind of thermal shock resistance for improvement of filter for molten metal and high temperature impact resistance.
Of the present invention general in, the ceramic material that foam filter for filtering molten metal comprises adhesives and bonded together by this adhesives, described adhesives comprises the carbon base body that network-like carbon connects, and in described ceramic material, a part is spherical granular material.
In a particular embodiment, described spherical particle material is main silicon oxide-containing, aluminium oxide, zirconia, titanium oxide, magnesia or the material containing two kinds of these oxides.
As preferred embodiment, silica spheroidal material addition is 1 ~ 10% of ceramic material gross weight.The usage ratio of other the spherical ceramic materials outside silicon can be ceramic material gross weight 10 ~ 35% between.
In another embodiment of the invention, the raw materials of filter comprises the ceramic material of 25-44%, the carbon-rich material of 56-75%, described carbon-rich material comprises above-mentioned adhesives and DIC, and the ceramic material of no more than 50% is introduced with form of spherical particles.
Further, this DIC is graphite, and content is no more than 20% of filter gross weight.
As further preferred, this DIC is the mixture of graphite and carbon black, and wherein content of carbon black is no more than 10% of filter gross weight.
As an optimization formula of the present invention, raw materials forms primarily of following ingredients in mass parts: corundum, 10-18; Alumina powder, 10-18; Graphite, 6-15; Lignin, 15-25; Carbon black, 6-15; And rich carbon binding agent, 20-40.Wherein, the consumption of carbon black is preferably more than the amount of graphite.Be more preferably 1/3 ~ 2/3 of quantity of graphite.
The invention still further relates to the method for above-mentioned filter, comprise the following steps: 1) ceramic material, adhesives and other composition liquid-carriers will be comprised be mixed with slurry; 2) slurry prepared is coated with hangs on open cell porous material and form at least one deck refractory coating; 3) open cell porous material forming refractory coating is optionally carried out impregnation process; 4) sinter under reducing atmosphere.
As preferred embodiment, described impregnated material is one or more in resin, lignin, cellulose, pitch or tar.
As further preferably, in step 2) and 3) between also comprise: between 100-200 DEG C, dry painting hangs with the open cell porous material of refractory coating.
The present invention, by a part for ceramic material being introduced with spheric granules form, unexpectedly improves thermal shock resistance and the high temperature impact resistance of filter for molten metal.In other aspects of the present invention, by carrying out formula, particle diameter etc. preferably, further improving thermal shock resistance and compression strength.Introduce a high proportion of carbon component particularly by product, not only reduce cost, and reduce the specific heat capacity of product, being easy to start and filtering, not easily causing the crystallization of motlten metal when starting.
Detailed description of the invention
Unless stated otherwise, calculate all by percentage to the quality when mentioning component ratio herein.
In the present invention, can be any known refractory ceramic material in this area by the ceramic material that adhesives is bonding, its provide required by filter to the corrosion function of motlten metal and the tolerance of high temperature.The example being applicable to refractory ceramic material of the present invention comprises alumina, aluminium oxide, zirconium English powder, magnesia, mullite, aluminium oxide, zirconia, titanium oxide, fused alumina zirconia, zirconium corundum, mullite, schmigel, clay, pyrophillite, wollastonite, kyanite, sillimanite, carborundum, zirconium carbide, titanium carbide, calcium carbide, aluminium carbide, spinelle, A Long, magnesium A Long, Sialon, Sialon-carborundum, Sialon-corundum-carborundum, olivine, mullite etc.The particle diameter of these materials usually below 200 orders, more preferably below 325 orders.
A feature of the present invention is, is introduced by the refractory ceramic material of part with spherical particle.Introduce spherical particle, thermal shock resistance and the high temperature impact resistance of product can be improved.The performance of the impact of described high temperature impact resistance refers at high temperature (such as filtration of liquid steel device, at such as 1100 DEG C) metals tolerant fused solution.In typical embodiment, spherical particle material is main silicon oxide-containing, aluminium oxide, zirconia, titanium oxide, magnesia or the material containing two kinds of aforesaid oxides.The possible reason that above-mentioned spherical ceramic materials has advantage is that spheroidal material has low-expansion coefficient, can improve the thermal shock resistance of product.Be beneficial to the tightly packed of material in product simultaneously, product high temperature thermal-shock resistance is improved.In application examples of the present invention, silica spheroidal material addition is 1 ~ 10% based on ceramic material gross weight, such as 5 ~ 8%.Inventor does not attempt adding more spherical silica, and this is owing to worrying to add the softening temperature that too much silica can reduce filter inadequately.The usage ratio of other ceramic materials can be ceramic material gross weight 10 ~ 35% between, such as, between 15 ~ 30%, more such as between 20 ~ 25%.
Adhesives comprises carbon base body, and refractory material bonds together by it.Adhesives is preferably the form of coke or semi-coke, and it by being heated to 500 ~ 1100 DEG C and obtaining under no oxygen condition by organic carbon-rich material.
The scope of ceramic material and adhesives relative scale can be the refractory material of at least 50%, the no more than adhesives of 50%; In a kind of detailed description of the invention, use the refractory material of at least 55%, the adhesives of no more than 45%, the refractory material of such as at least 60%, the adhesives of no more than 40%.
In another embodiment of the invention, the raw materials for the filter of filtering molten metal comprises the ceramic material of 25-44%, the carbon-rich material of 56-75%.Wherein, the ceramic material form of spherical particles of no more than 50% is introduced.Carbon-rich material comprises above-mentioned adhesives and DIC.In a kind of detailed description of the invention, this DIC is graphite, and content is no more than 20% of filter gross weight; In another embodiment, by graphite and carbon black with the use of having Advantageous Effects.Graphite has good heat conductivility, also has less density, good heat-resisting quantity and chemical stability, resistant to corrosion.But the granularity of graphite is comparatively large, and when being used alone, the mobility of gained slurry is not good, the carbon black that the present invention selects particle diameter less, uses together with the graphite that granularity is larger, between the gap that can be filled in graphite, be conducive to the being coated with property improving slurry.Carbon black belongs to amorphous carbon cellulosic material, and easy and metallic silicon reacts, and is difficult to dissolve, can improves the microstructure of product, improve mechanical performance and high-temperature behavior in steel.The Another reason introducing carbon black replaces graphite by carbon black part, can reduce the requirement to water when preparing slurry, improve the rheological property of slurry.
This high-carbon takes full advantage of high refractoriness, good thermal conductivity, low thermal coefficient of expansion, stable chemical nature and the erosion resisting of material with carbon element mutually, makes the product obtained have the performances such as good thermal shock resistance, thermal-shock resistance, high rupture strength.The wide material sources of carbon, cheap simultaneously, can reduce the cost of material of filter.
In a kind of better embodiment of the present invention, filter is made primarily of corundum, alumina powder, graphite, carbon black, lignin and above-mentioned adhesives.Here, by corundum and alumina powder collocation, for the formation of the non-carbon material in filter.Corundum has high Mohs' hardness, gives the higher rigidity of filter and mechanical strength.But inventor finds, uses corundum merely, it is poor that institute forms the being coated with property of slurry, is namely unfavorable for that slurry painting hangs over the surface of the foamed material hereafter mentioned.Mixing with alumina powder, then significantly improves the being coated with property of slurry.The particle diameter of corundum is preferably below 325 orders, and the particle diameter of alumina powder is preferably the scope of 1-10 microns.In the present invention, based on 100 parts of raw material total amounts (not comprising water), preferably introduce 10-18 part, the more preferably corundum of 13-16 part and the alumina powder of 10-18 part, more preferably 13-16 part.Inventor finds through great many of experiments, the introducing total amount of above-mentioned non-carbon material material is less than 40%, be not less than 20%, both the mechanical strength of filter can have been kept, also its weight and cost can be controlled, the most important thing is the specific heat capacity reducing product, be conducive to the quick startup of in use molten metal.Corundum and aluminium oxide reasonably combined, can improve the microstructure of product, effectively improve the properties of product.
In aforementioned better embodiment, based on 100 parts of raw material total amounts (not comprising water), preferably introduce the graphite of 6-15 part, more preferably 8-13 part, preferably introduce the carbon black of 6-15 part, more preferably 8-13 part.Preferably, the consumption of carbon black is no more than the amount of graphite, is preferably less than the consumption of graphite, and such as, its consumption is 1/3 ~ 2/3 of quantity of graphite.The consumption of carbon black exceedes graphite, may have a negative impact in some embodiments to the heat conductivility of filter, the final thermal shock resistance reducing filter.
The particle diameter of the graphite used in the present invention, usually below 200 orders, typically below 325 orders, like this, correspondingly uses particle diameter at the less carbon black of particle diameter.When using the graphite of average grain diameter about 100 μm, particle diameter can be used to be the carbon black of 10 ~ 50 μm.In a specific embodiment of the present invention, employ average grain diameter at the graphite of 50 ~ 70 μm, correspondingly use particle diameter at the carbon black of 5 ~ 15 μm of scopes.The present invention more preferably uses content to be greater than 99.0%, the carbon black that granularity is less than 10 microns.Inventor is surprised to find that, uses more short grained carbon black, and namely particle diameter is at 100 ~ 900nm, carbon black more preferably between 100 ~ 500nm, and the thermal shock resistance of gained filter is enhanced.Be not wishing to be bound by theory, a possible reason is the heat conductivility that less particle size carbon black improves filter.
In a preferred embodiment of the invention, in composition of raw materials, metallic silicon power and/or aluminium powder is introduced.Metallic silicon is conducive to the non-oxidizability improving product.Add cold crushing strength and high temperature break resistant intensity that a small amount of aluminium powder can improve product further.In addition, the silicon monoxide that metal A l/Si discharges, an aluminium oxide gas meet oxygen or carbon dioxide gas knows from experience reaction generation aluminium oxide and silica, is deposited on the surface of solids in pore, and blocking pore, is conducive to the raising of non-oxidizability.In the present invention, the introduction volume of silica flour and aluminium powder is aggregated between 1 ~ 5%.
When there is metallic silicon, preferably in carbon-rich material, comprise carbon black, carbon black granularity is preferably less than 10 microns.Carbon black belongs to amorphous carbon cellulosic material, and easy and metallic silicon reacts, and is difficult to dissolve, can improves the microstructure of product, improve mechanical performance and high-temperature behavior in steel.
Usually, above-mentioned each composition is mixed with liquid-carrier, form slurry.The liquid-carrier used can water, methyl alcohol, ethanol, benzinum etc., actual use in water be preferred.Other a small amount of auxiliary agents can also be comprised, such as suspending agent, defoamer, wetting agent, dispersant, activating agent etc. in slurry.These auxiliary agents are that prior art is known.
Next, the slurry prepared is coated with hangs on foamed material and form at least one deck refractory coating.Foamed material is such as polyurethane foam, and for providing porous for filter, make to comprise hole that is irregular or random distribution in the filter made, this some holes is as the passage of motlten metal.This some holes all or part of intercommunication maybe can have multiple passage, and motlten metal is passed through.
After being coated with, preferably dried by the foamed material scribbling slurry, the product after oven dry carries out impregnation process.Described impregnation process, refers to the base substrate with the drying in the weak solution dipping containing resin, lignin, cellulose, pitch or tar.Alternatively, this impregnation steps also can be carried out after the sintering.By impregnation technology, goods open pore is reduced, carbon residue improves, thus the normal temperature/elevated temperature strength of raising product, thermal shock resistance and thermal-shock resistance.For better improving pickling efficiency, Special vacuum-pressure oil immersion equipment can be adopted.The product being about to dry puts into container, covered container lid, vacuumizes and injects impregnant and pressurize a period of time.
Next, sinter under inert atmosphere or reducing atmosphere, sintering temperature is suitable to be controlled at 500 DEG C ~ 1100 DEG C.Before sintering, between 100-200 DEG C, dry painting hangs with the open cell porous material of refractory coating alternatively.
Embodiment 1
By the pitch of 38wt% zirconium mullite powder, 38 wt %, the spherical alumina titanium of 20%, the metallic silicon power of 0.5% and 0.5% aluminium powder, add water in 1.5 wt % dispersants and 1.5 wt % activating agents and make slurry.
This slurry is used for apply 50*50*22,10PPI polyurethane foam of well cutting.Be coated with after spraying with the slurry of dilution after the foam hanging up properly slurry carries out drying dry again, dried product adopts the pitch of about 170 DEG C to flood under vacuum atmosphere, then sinters at 950 DEG C, obtains sample again.Sample is put into Muffle furnace 1100 DEG C of insulations 10 minutes, be placed on immediately in the water of normal temperature, carry out thermal shock resistance test, repeatedly operate after taking-up, after carrying out 8 times, filter ftractures.Cold crushing strength is 1.35Mpa.With 50kg, 1630 DEG C, pouring head is 500mm molten steel carries out pouring experiment, detecting sample, to withstand cast not damaged.
Comparative example 1
Repeat embodiment 1, difference is, titanium oxide is ordinary powder powder, and particle diameter is the powder of 1 ~ 4 μm.After carrying out 6 thermal shock resistance tests, filter ftractures.Cold crushing strength is 1.03Mpa.
Embodiment 2
By the spinel powder of 19%, 42% pitch, 35% schmigel (wherein half is sphere material), 3% Ludox, 0.5% metallic aluminium powder, 0.5% dispersant.With efficient blender, powder and water are mixed and made into slurry, this slurry is used for applying 50*50*22,10PPI polyurethane foam.Being coated with after the foam hung up properly carries out drying is coated with once dry again with the slurry of dilution again, and then product adopts liquid phenolic resin to carry out impregnation process, finally sinters at 1000 DEG C, obtains sample.Sample is incubated 10 minutes in Muffle furnace in 1100 DEG C, is placed on immediately in the water of normal temperature, carries out thermal shock resistance test, repeatedly operate after taking-up, after carrying out 8 times, filter ftractures.Cold crushing strength is 2.20Mpa.At 1630 DEG C, 50 kilograms of molten steel carry out pouring experiment, and product does not have fragmentation, and pouring head is 650mm.
Comparative example 2
Repeat embodiment 2, difference is, schmigel is ordinary powder.Particle diameter is the powder of 1 ~ 4 μm.After carrying out 3 thermal shock resistance tests, filter ftractures.Cold crushing strength is 1.55Mpa.Be 650mm at pouring head, at 1630 DEG C, 50 kilograms of molten steel carry out pouring experiment, and product occurs that local is broken.
Embodiment 3
By the Sialon-carborundum powder of 27%, 18% graphite, 42.5% pitch, 10% spherical zircite, 2% active silica, 0.5% dispersant.With an efficient blender, above-mentioned material and water are mixed and made into the slurry of certain viscosity.The slurry of mixed system is used for applying 50*50*22,10PPI polyurethane foam.Being coated with after the polyurethane foam hung up properly carries out drying sprays once dry again with the slurry of dilution again, and then product adopts tar to carry out impregnation process, sinters, obtain sample at 800 DEG C under oxygen-free atmosphere.Sample is incubated 10 minutes in Muffle furnace in 1100 DEG C, is placed on immediately in the water of normal temperature, carries out thermal shock resistance test, repeatedly operate after taking-up, after carrying out 10 times, filter ftractures.Cold crushing strength is 1.63Mpa.At 1630 DEG C, carry out pouring molten steel test, product does not have fragmentation.
Comparative example 3
Repeat embodiment 3, difference is, zirconia is ordinary powder, and particle diameter is 5 ~ 10 μm.After carrying out 3 thermal shock resistance tests, filter ftractures.Cold crushing strength is 1.43Mpa.At 1630 DEG C, carry out pouring molten steel test, there is crackle in product.
Embodiment 4
By the nanometer fused alumina zirconia powder of 20%, the spherical alumina aluminium powder of 19%, graphite, the carbon black of 10%, the pitch of 34% of 15%, 1% metallic silicon power, the dispersant of 0.5% and the mixture water of 0.5% activating agent form slurry.The slurry of mixed system is used for applying 50*50*22,10PPI polyurethane foam.Being coated with after the polyurethane foam hung up properly carries out drying sprays once dry again with the slurry of dilution again, and then product adopts tar to carry out impregnation process, sinters, obtain sample at 800 DEG C under oxygen-free atmosphere.Sample is incubated 10 minutes in Muffle furnace in 1100 DEG C, is placed on immediately in the water of normal temperature, carries out thermal shock resistance test, repeatedly operate after taking-up, after carrying out 12 times, filter ftractures.Cold crushing strength is 2.10Mpa.At 1630 DEG C, carry out pouring molten steel test, product does not have fragmentation.
Comparative example 4
Repeat embodiment 4, difference is, uses common alumina powder, and particle diameter is 3 ~ 6 μm.After sample carries out 5 thermal shock resistance tests, filter ftractures.Cold crushing strength is 1.82Mpa.At 1630 DEG C, carry out pouring molten steel test, product local is broken.
Embodiment 5
Adopt nanometer pyrophillite 40%(wherein half be spheric granules), graphite 15%, pitch 40%, Ludox 2%, polyvinyl alcohol 1%, spherical molten silicon micro mist 4%, above-mentioned powder is added successively and water makes slurry in a high speed mixer, then be coated with on the polyurethane sponge being hung on 50*50*22,10PPI dry, finally sinter under 900 DEG C of oxygen-free atmospheres, obtain sample.Sample is incubated 10 minutes in Muffle furnace in 1100 DEG C, is placed on immediately in the water of normal temperature, carries out thermal shock resistance test, repeatedly operate after taking-up, after carrying out 6 times, filter ftractures.Cold crushing strength is 1.35Mpa.At 1630 DEG C, carry out pouring molten steel test, product does not have fragmentation.
Comparative example 5
Repeat embodiment 5, difference is, pyrophillite is ordinary powder, and particle diameter is 2 ~ 10 μm.After carrying out 3 thermal shock resistance tests, filter ftractures.Cold crushing strength is 1.02Mpa.At 1630 DEG C, carry out pouring molten steel test, product occurs broken.
Embodiment 6-13
By table 1 be formula make the filter being of a size of 50*50*15mm, test gained filter, test result is in table 2.
In table 2, cold crushing strength records according to GB/T25139-2010, the mechanical strength of reflection filter.Cold crushing strength is higher, and filter is more not cracky in transport and use procedure.In addition, as a rule, cold crushing strength is higher, and the crushing strength under high temperature of filter can be higher.The specific heat capacity of density reflection filter.Density is less, and the heat that filter absorbs when filter motlten metal can be less, and the possibility that motlten metal solidifies can be less.
Table 1 embodiment 6-13 pulp furnish table
| Embodiment | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Corundum | 11 | 18 | 15 | 28 | — | 15 | 15 | 15 |
| Alumina powder | 17 | 17 | 15 | — | 35 | 15 | 15 | 15 |
| Graphite | 7 | 14 | 13 | 7 | 7 | 20 | — | 23 |
| Carbon black | 7 | 10 | 7 | 7 | 7 | — | 20 | 17 |
| Lignin | 22 | 18 | 20 | 22 | 22 | 20 | 20 | — |
| Binding agent | 36 | 23 | 30 | 36 | 36 | 30 | 30 | 30 |
In table 1, the particle diameter of corundum is 325 orders; The particle diameter of alumina powder is 2-5 microns; The particle diameter of graphite is 270 orders; The particle diameter of carbon black is 100 ~ 500nm.
The test result of table 2 embodiment 6-13 gained filter
| Embodiment | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Cold crushing strength (Mpa) | 1.34 | 1.23 | 1.69 | 1.09 | 1.21 | 0.99 | 1.02 | 1.10 |
| Density g/cm 3 | 0.46 | 0.47 | 0.45 | 0.44 | 0.44 | 0.41 | 0.43 | 0.42 |
| Cast test (1630 DEG C) | Pass through | Pass through | Pass through | Pass through | Pass through | Do not pass through | Do not pass through | Do not pass through |
Some samples are prepared with typical raw material and typical preparation method herein although disclose, and achieve Expected Results, but those skilled in the art it is expected to, adopt other raw material also may prepare product of the present invention, even achieve and be better than technique effect of the present invention, these are all encompassed within claims limited range.
Claims (12)
1. the foam filter for filtering molten metal, the ceramic material comprising adhesives and bonded together by this adhesives, described adhesives comprises the carbon base body that network-like carbon connects, in described ceramic material, a part of no more than 50% is spherical granular material, and, the raw materials of filter comprises the ceramic material of 25-44%, the carbon-rich material of 56-75%, described carbon-rich material comprises above-mentioned adhesives and DIC, this DIC is the mixture of graphite and carbon black, wherein content of carbon black is no more than 10% of filter gross weight, and the consumption of carbon black is no more than the amount of graphite.
2. filter as claimed in claim 1, described ceramic material be selected from alumina, aluminium oxide, zirconium English powder, magnesia, zirconium mullite, zirconia, titanium oxide, fused alumina zirconia, zirconium corundum, mullite, schmigel, clay, pyrophillite, wollastonite, kyanite, sillimanite, spinelle, A Long, magnesium A Long, Sialon, Sialon-carborundum, Sialon-corundum-carborundum and olivine one or more.
3. filter as claimed in claim 1, wherein, described spherical granular material is main silicon oxide-containing, aluminium oxide, zirconia, titanium oxide, magnesia or the material containing two kinds of these oxides.
4. filter as claimed in claim 3, wherein, silica spheroidal material addition is 1 ~ 10% of ceramic material gross weight.
5. filter as claimed in claim 3, wherein, the usage ratio of other the spherical ceramic materials outside silicon be ceramic material gross weight 10 ~ 35% between.
6. filter as claimed in claim 1, wherein, described adhesives is heated to 500-1100 DEG C under anaerobic by one or more of pitch, tar and rich carbon resin and is formed.
7. filter as claimed in claim 1, wherein, raw materials forms primarily of following ingredients in mass parts:
Corundum, 10-18;
Alumina powder, 10-18;
Graphite, 6-15;
Lignin, 15-25;
Carbon black, 6-15;
Rich carbon binding agent, 20-40.
8. filter as claimed in claim 1, it is characterized in that, the consumption of carbon black is 1/3 ~ 2/3 of quantity of graphite.
9. filter as claimed in claim 1, it is characterized in that, the particle diameter of carbon black is less than 10 microns.
10. filter as claimed in claim 1, it is characterized in that, the particle diameter of carbon black is between 100 ~ 900nm.
11. filters as claimed in claim 10, it is characterized in that, the particle diameter of carbon black is between 100 ~ 500nm.
12. filters as described in any one of claim 1 to 11, comprise silica flour and/or the aluminium powder of 1 ~ 5% further.
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| CN105727756B (en) * | 2014-12-09 | 2018-11-06 | 中国科学院金属研究所 | A kind of pair of gradient pore structured Sialon silicon carbide membrane tube and preparation method thereof |
| CN107522496A (en) * | 2017-06-15 | 2017-12-29 | 上海极率科技有限公司 | The preparation method of composite ceramic-based high temperature filtration diaphragm |
| CN111205072A (en) * | 2020-02-27 | 2020-05-29 | 辽宁科技大学 | Preparation method of 3D printing magnesium-aluminum molten metal filtering device |
| CN112692238B (en) * | 2020-12-18 | 2021-09-21 | 东北大学 | Method for filtering inclusions in steel by honeycomb ceramic under action of external electric field |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0593278A1 (en) * | 1992-10-13 | 1994-04-20 | Ngk Insulators, Ltd. | Filter for metal hot melt and process for production thereof |
| CN1449312A (en) * | 2000-08-31 | 2003-10-15 | 福塞科国际有限公司 | Refractory articles |
| CN101810973A (en) * | 2010-04-15 | 2010-08-25 | 济南圣泉倍进陶瓷过滤器有限公司 | Filter for filtering molten metal and manufacturing method thereof |
| CN102196850A (en) * | 2008-10-31 | 2011-09-21 | 美商绩优图科技股份有限公司 | Fibrous aluminum titanate substrates and methods of forming the same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8918048D0 (en) * | 1989-08-08 | 1989-09-20 | Foseco Int | Ceramic foam filters |
-
2012
- 2012-12-26 CN CN201210573675.6A patent/CN102989235B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0593278A1 (en) * | 1992-10-13 | 1994-04-20 | Ngk Insulators, Ltd. | Filter for metal hot melt and process for production thereof |
| CN1449312A (en) * | 2000-08-31 | 2003-10-15 | 福塞科国际有限公司 | Refractory articles |
| CN102196850A (en) * | 2008-10-31 | 2011-09-21 | 美商绩优图科技股份有限公司 | Fibrous aluminum titanate substrates and methods of forming the same |
| CN101810973A (en) * | 2010-04-15 | 2010-08-25 | 济南圣泉倍进陶瓷过滤器有限公司 | Filter for filtering molten metal and manufacturing method thereof |
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