CN108358650A - A kind of preparation method of high-temperature refractory - Google Patents

A kind of preparation method of high-temperature refractory Download PDF

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Publication number
CN108358650A
CN108358650A CN201810174042.5A CN201810174042A CN108358650A CN 108358650 A CN108358650 A CN 108358650A CN 201810174042 A CN201810174042 A CN 201810174042A CN 108358650 A CN108358650 A CN 108358650A
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preparation
mixed
refractory
temperature refractory
temperature
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王虎
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Hefei Ming Yu High Temperature Technology Co Ltd
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Hefei Ming Yu High Temperature Technology Co Ltd
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Abstract

The present invention provides a kind of preparation method of high-temperature refractory, including following preparation process：A, carbonaceous material, fire resisting base material and aluminium oxide are mixed and imports ball milling in ball grinder, added organic solvent, stir to get slurry；B, partially stabilized zirconia, zirconium carbide particle, acrylic amine, methylene-bisacrylamide and ammonium persulfate are mixed, is imported in high mixer, stirring, sonic oscillation obtain material one；C, catalyst, bonding agent, stirring and dissolving are added into material one, then slurry is imported, heat and is stirred, obtains green body；D, by body drying, crushing, then redrying processing is carried out, carries out cooling, compression moulding later.Refractory material prepared by the present invention, compared with traditional refractory material, stomata is lower, and the close higher of body possesses smaller expansion rate and reheat linear change, and stability is more preferable, and thermal shock performance is more superior, and wearability is more preferable.

Description

A kind of preparation method of high-temperature refractory
Technical field
The invention belongs to technical field of refractory materials, and in particular to a kind of preparation method of high-temperature refractory.
Background technology
In traditional sense, refractory material refers to the inorganic non-metallic material that refractoriness is not less than 1580 DEG C, it is for height The basic material of temperature technique service is used as structural material and industrial high temperature container and the portion of the Thermal Equipments such as high temperature kiln The material of part, and corresponding physicochemical change and mechanism can be born.
Most of refractory material is with natural crystal（Such as fire clay, silica, magnesite, dolomite）It is manufactured for raw material , using certain raw materials of industry and artificial-synthetic material（Such as commercial alumina, silicon carbide, mullite synthesizing, synthetic spinel Deng）Also increasing, therefore, there are many type of refractory material.Refractory material can be divided into according to mineral composition aoxidizes siliceous, silicon Sour aluminum, olivine matter, spinel, contains carbonaceous, contains zirconia refractory and special refractory magnesia, dolomite matter；It presses It can be divided into natural crystal and artifact according to manufacturing method；It can be divided into block elements and unshape refractory by its mode； It can be divided into not burned product, burnt product and melt-cast products according to heat treatment mode；It can be divided into according to refractoriness common, advanced and special Grade refractory product；It can be divided into acid, neutral and basic refractory according to chemical property；It can be divided into lightweight and again according to its density Fire resistant materials；It can be divided into standard brick, special shaped brick, special special shaped brick, pipe and flame ware according to the shape and size of its product；Also Blast furnace use, cement kiln use, glass furnace use, ceramic kiln refractory etc. can be divided by its application.
It is a problem of generally existing in inorganic non-metallic and material that the mechanical tenacity of inorganic non-metallic material is poor, is made To belong to the refractory material of inorganic non-metallic material, mechanical tenacity is also poor, although refractory material is almost in use It need not be moved, but thermal shock resistance when its poor mechanical tenacity has also influenced its high temperature, in chilling urgency Gap that is hot and using is resistance to since the influences such as cracking, peeling easily occur under the effect of expanding with heat and contract with cold for larger temperature difference refractory material The case where fiery material integrity, reduces the service life of refractory material；The resistance to of movement is often carried out simultaneously for those needs Fiery material product, poor mechanical tenacity can then greatly increase the spoilage of refractory product, influence its routine use.
Invention content
The object of the present invention is to provide a kind of preparation method of high-temperature refractory, refractory material prepared by the present invention, with Traditional refractory material is compared, and stomata is lower, and the close higher of body possesses smaller expansion rate and reheat linear change, and stability is more preferable, Thermal shock performance is more superior, and wearability is more preferable.
The present invention provides the following technical solutions：
A kind of preparation method of high-temperature refractory, including following preparation process：
A, carbonaceous material, fire resisting base material and aluminium oxide are mixed and imports ball milling 3-5h in ball grinder, add organic solvent, stirred Uniformly, slurry is obtained；
B, partially stabilized zirconia, zirconium carbide particle, acrylic amine, methylene-bisacrylamide and ammonium persulfate are mixed, is led Enter in high mixer, 10-15min is stirred under the rotating speed of 2000-3000r/min, then use sonic oscillation 20-25min, dispersion is equal After even, material one is obtained；
C, catalyst, bonding agent, the stirring and dissolving 5-10min at 60-80 DEG C are added into material one, then slurry is imported, 20-25min is heated and stirred at 80-90 DEG C, obtains green body；
D, green body is placed in 60-70 DEG C of thermostatic drying chamber, after dry 15-20min, was crushed to 200-300 mesh and sieves, then into The processing of row redrying, carries out cooling, compression moulding, you can obtain finished product later.
Preferably, the carbonaceous material of the step a is that aluminum-carbon refractory material, magnesia-carbon refractory material and aluminum-spinel-carbon are resistance to Any one of fiery material or several mixing.
Preferably, the preparation method of the fire resisting base material of the step a is：By magnesia, magnesium aluminate spinel, alumina powder, two Oxidation manganese powder, manganese powder and additive are mixed to join in kneading machine, after mixing, are fitted into compression moulding in mold, then It is placed at 180-190 DEG C dry 6-8h and is sintered 2-3h at 800-950 DEG C, you can obtain fire resisting base material after dry.
Preferably, the magnesia is fused magnesite or magnesite clinker.
Preferably, the organic solvent of the step a is in dichloroethanes, toluene, dimethylbenzene, tetrahydrofuran and n-hexane It is any.
Preferably, the partially stabilized zirconia of the step b be stable calcium oxide zirconium oxide, stabilized magnesium hydroxide zirconium oxide and Any one of yttria-stabilized zirconia or several mixing.
Preferably, the bonding agent of the step c is in dextrin, spent pulping liquor, calcium lignosulfonate and methylcellulose Any one or several combinations.
Preferably, the method for the redrying processing of the step d is：Material is placed in hothouse, at 120-140 DEG C Lower dry 2-4h, is then passed through nitrogen in electrical kiln, is heated to 850-900 DEG C, keeps the temperature 5-7h.
The beneficial effects of the invention are as follows：
Refractory material prepared by the present invention, compared with traditional refractory material, stomata is lower, and the close higher of body possesses smaller swollen Swollen rate and reheat linear change, stability is more preferable, and thermal shock performance is more superior, and wearability is more preferable.
The partially stabilized zirconia added in the present invention can preferably be coated on zirconium carbide surface, because of the portion introduced Divide the fine size of stabilizing zirconia surmised compared with zirconium carbide, surface area is big, by controlling ratio between the two, ensure that part Stabilizing zirconia is evenly dispersed and wraps up zirconium carbide particle so that the refractory material of preparation itself can be sintered at high temperature, shape At zirconium oxide combination network, erosion resistibility is strong, at the same its oxidation after volume have certain expansion, avoid sintering cause compared with Big volume contraction.
Refractory material prepared by the present invention has very high tensile strength, higher thermal conductivity and lower thermal expansion system Number.High tensile strength can improve the limit of rupture stress of material；High thermal conductivity can quickly be passed in environment temperature violent change Heat conduction amount reduces material internal temperature gradient；Low coefficient of thermal expansion be unlikely to material internal there are when temperature gradient formed compared with The resistance to heat shocks energy of material can be improved in the comprehensive function of big internal stress, these three performances.
Specific implementation mode
Embodiment 1
A kind of preparation method of high-temperature refractory, including following preparation process：
A, carbonaceous material, fire resisting base material and aluminium oxide are mixed and imports ball milling 3h in ball grinder, add organic solvent, stirring is equal It is even, obtain slurry；
B, partially stabilized zirconia, zirconium carbide particle, acrylic amine, methylene-bisacrylamide and ammonium persulfate are mixed, is led Enter in high mixer, 10-15min is stirred under the rotating speed of 3000r/min, then use sonic oscillation 20min, after being uniformly dispersed, obtained To material one；
C, catalyst, bonding agent, the stirring and dissolving 10min at 60 DEG C are added into material one, then slurry is imported, at 90 DEG C 20min is heated and stirred, green body is obtained；
D, green body is placed in 70 DEG C of thermostatic drying chamber, after dry 20min, was crushed to 200 mesh sieve, then carry out redrying Processing carries out cooling, compression moulding, you can obtain finished product later.
The carbonaceous material of step a is in aluminum-carbon refractory material, magnesia-carbon refractory material and aluminum-spinel carbon refractory Any one or several mixing.
The preparation method of the fire resisting base material of step a is：By magnesia, magnesium aluminate spinel, alumina powder, manganese dioxide powder, gold Belong to manganese powder and additive is mixed to join in kneading machine, after mixing, is fitted into compression moulding in mold, then be placed at 180 DEG C Dry 8h is sintered 2h, you can obtain fire resisting base material after dry at 950 DEG C.
Magnesia is fused magnesite.
The organic solvent of step a is tetrahydrofuran.
The partially stabilized zirconia of step b is stable calcium oxide zirconium oxide, stabilized magnesium hydroxide zirconium oxide and stabilized with yttrium oxide The mixing of zirconium oxide.
The bonding agent of step c is the combination of dextrin, spent pulping liquor, calcium lignosulfonate and methylcellulose.
Step d redrying processing method be：Material is placed in hothouse, dry 2h, then exists at 140 DEG C It is passed through nitrogen in electrical kiln, is heated to 900 DEG C, keeps the temperature 5h.
Embodiment 2
A kind of preparation method of high-temperature refractory, including following preparation process：
A, carbonaceous material, fire resisting base material and aluminium oxide are mixed and imports ball milling 3h in ball grinder, add organic solvent, stirring is equal It is even, obtain slurry；
B, partially stabilized zirconia, zirconium carbide particle, acrylic amine, methylene-bisacrylamide and ammonium persulfate are mixed, is led Enter in high mixer, 10min is stirred under the rotating speed of 2000r/min, then use sonic oscillation 20min, after being uniformly dispersed, obtain material Material one；
C, catalyst, bonding agent, the stirring and dissolving 5min at 60 DEG C are added into material one, then slurry is imported, at 80 DEG C 20min is heated and stirred, green body is obtained；
D, green body is placed in 60 DEG C of thermostatic drying chamber, after dry 15min, was crushed to 200 mesh sieve, then carry out redrying Processing carries out cooling, compression moulding, you can obtain finished product later.
The carbonaceous material of step a is the mixed of aluminum-carbon refractory material, magnesia-carbon refractory material and aluminum-spinel carbon refractory It closes.
The preparation method of the fire resisting base material of step a is：By magnesia, magnesium aluminate spinel, alumina powder, manganese dioxide powder, gold Belong to manganese powder and additive is mixed to join in kneading machine, after mixing, is fitted into compression moulding in mold, then be placed at 180 DEG C Dry 6h is sintered 2h, you can obtain fire resisting base material after dry at 800 DEG C.
Magnesia is magnesite clinker.
The organic solvent of step a is n-hexane.
The partially stabilized zirconia of step b is stable calcium oxide zirconium oxide, stabilized magnesium hydroxide zirconium oxide and stabilized with yttrium oxide The mixing of zirconium oxide.
The bonding agent of step c is the combination of dextrin, spent pulping liquor, calcium lignosulfonate and methylcellulose.
Step d redrying processing method be：Material is placed in hothouse, dry 2h, then exists at 120 DEG C It is passed through nitrogen in electrical kiln, is heated to 850 DEG C, keeps the temperature 5h.
Embodiment 3
A kind of preparation method of high-temperature refractory, including following preparation process：
A, carbonaceous material, fire resisting base material and aluminium oxide are mixed and imports ball milling 5h in ball grinder, add organic solvent, stirring is equal It is even, obtain slurry；
B, partially stabilized zirconia, zirconium carbide particle, acrylic amine, methylene-bisacrylamide and ammonium persulfate are mixed, is led Enter in high mixer, 15min is stirred under the rotating speed of 3000r/min, then use sonic oscillation 25min, after being uniformly dispersed, obtain material Material one；
C, catalyst, bonding agent, the stirring and dissolving 10min at 80 DEG C are added into material one, then slurry is imported, at 90 DEG C 25min is heated and stirred, green body is obtained；
D, green body is placed in 70 DEG C of thermostatic drying chamber, after dry 20min, was crushed to 300 mesh sieve, then carry out redrying Processing carries out cooling, compression moulding, you can obtain finished product later.
The carbonaceous material of step a is the mixed of aluminum-carbon refractory material, magnesia-carbon refractory material and aluminum-spinel carbon refractory It closes.
The preparation method of the fire resisting base material of step a is：By magnesia, magnesium aluminate spinel, alumina powder, manganese dioxide powder, gold Belong to manganese powder and additive is mixed to join in kneading machine, after mixing, is fitted into compression moulding in mold, then be placed at 190 DEG C Dry 8h is sintered 3h, you can obtain fire resisting base material after dry at 950 DEG C.
Magnesia is fused magnesite.
The organic solvent of step a is dichloroethanes.
The partially stabilized zirconia of step b is stable calcium oxide zirconium oxide, stabilized magnesium hydroxide zirconium oxide and stabilized with yttrium oxide The mixing of zirconium oxide.
The bonding agent of step c is the combination of dextrin, spent pulping liquor, calcium lignosulfonate and methylcellulose.
Step d redrying processing method be：Material is placed in hothouse, dry 4h, then exists at 140 DEG C It is passed through nitrogen in electrical kiln, is heated to 900 DEG C, keeps the temperature 7h.
Finished product prepared by above example is detected, following detection data is obtained：
Table one：
Project Embodiment 1 Embodiment 2 Embodiment 3
Bulk density（g/cm3） 3.18 3.15 3.20
Compressive resistance（MPa） 102 105 105
Flexural strength（MPa） 18 17 18
Elasticity modulus（GPa） 64 63 63
Thermal conductivity（W/（m·k）） 5.235 5.431 5.385
1000 DEG C of thermal expansions（%） 1.05 1.02 1.02
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, although with reference to the foregoing embodiments Invention is explained in detail, for those skilled in the art, still can be to foregoing embodiments institute The technical solution of record is modified or equivalent replacement of some of the technical features.It is all the present invention spirit and Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.

Claims (8)

1. a kind of preparation method of high-temperature refractory, which is characterized in that including following preparation process：
A, carbonaceous material, fire resisting base material and aluminium oxide are mixed and imports ball milling 3-5h in ball grinder, add organic solvent, stirred Uniformly, slurry is obtained；
B, partially stabilized zirconia, zirconium carbide particle, acrylic amine, methylene-bisacrylamide and ammonium persulfate are mixed, is led Enter in high mixer, 10-15min is stirred under the rotating speed of 2000-3000r/min, then use sonic oscillation 20-25min, dispersion is equal After even, material one is obtained；
C, catalyst, bonding agent, the stirring and dissolving 5-10min at 60-80 DEG C are added into material one, then slurry is imported, 20-25min is heated and stirred at 80-90 DEG C, obtains green body；
D, green body is placed in 60-70 DEG C of thermostatic drying chamber, after dry 15-20min, was crushed to 200-300 mesh and sieves, then into The processing of row redrying, carries out cooling, compression moulding, you can obtain finished product later.
2. a kind of preparation method of high-temperature refractory according to claim 1, which is characterized in that the step a's contains Carbon material is any one of aluminum-carbon refractory material, magnesia-carbon refractory material and aluminum-spinel carbon refractory or several mixed It closes.
3. a kind of preparation method of high-temperature refractory according to claim 1, which is characterized in that the step a's is resistance to The preparation method of fiery base material is：Magnesia, magnesium aluminate spinel, alumina powder, manganese dioxide powder, manganese powder and additive are mixed It is added in kneading machine, after mixing, is fitted into compression moulding in mold, then be placed at 180-190 DEG C dry 6-8h, it is dry Afterwards, it is sintered 2-3h at 800-950 DEG C, you can obtain fire resisting base material.
4. a kind of preparation method of high-temperature refractory according to claim 3, which is characterized in that the magnesia is electric smelting Magnesia or magnesite clinker.
5. a kind of preparation method of high-temperature refractory according to claim 1, which is characterized in that the step a's has Solvent is any one of dichloroethanes, toluene, dimethylbenzene, tetrahydrofuran and n-hexane.
6. a kind of preparation method of high-temperature refractory according to claim 1, which is characterized in that the portion of the step b Point stabilizing zirconia be any one of stable calcium oxide zirconium oxide, stabilized magnesium hydroxide zirconium oxide and yttria-stabilized zirconia or Several mixing.
7. a kind of preparation method of high-temperature refractory according to claim 1, which is characterized in that the knot of the step c Mixture is any one of dextrin, spent pulping liquor, calcium lignosulfonate and methylcellulose or several combinations.
8. a kind of preparation method of high-temperature refractory according to claim 1, which is characterized in that the two of the step d The method of secondary drying process is：Material is placed in hothouse, dry 2-4h, is then passed through in electrical kiln at 120-140 DEG C Nitrogen is heated to 850-900 DEG C, keeps the temperature 5-7h.
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* Cited by examiner, † Cited by third party
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CN109265184A (en) * 2018-10-10 2019-01-25 湖州南浔研艺斋工艺品有限公司 A kind of preparation method of refractory material

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CN105777151A (en) * 2016-02-23 2016-07-20 鞍山市奥鞍耐火材料有限责任公司 Magnesium aluminate spinel refractory material containing manganese and preparing method thereof
CN107141003A (en) * 2017-06-12 2017-09-08 合肥铭佑高温技术有限公司 A kind of combined high temperature refractory material and preparation method thereof

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Publication number Priority date Publication date Assignee Title
CN105777151A (en) * 2016-02-23 2016-07-20 鞍山市奥鞍耐火材料有限责任公司 Magnesium aluminate spinel refractory material containing manganese and preparing method thereof
CN105753487A (en) * 2016-03-01 2016-07-13 中钢集团洛阳耐火材料研究院有限公司 Composite powder for improving scouring resistance of carbon-containing refractory material and preparation method of composite powder
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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