CN101423405A - Al8B4C7-Al4O4C composite refractory materials and preparation method thereof - Google Patents

Al8B4C7-Al4O4C composite refractory materials and preparation method thereof Download PDF

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CN101423405A
CN101423405A CNA2008101977422A CN200810197742A CN101423405A CN 101423405 A CN101423405 A CN 101423405A CN A2008101977422 A CNA2008101977422 A CN A2008101977422A CN 200810197742 A CN200810197742 A CN 200810197742A CN 101423405 A CN101423405 A CN 101423405A
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composite refractory
preparation
matter composite
powder
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邓承继
祝洪喜
白晨
余毅
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Wuhan University of Science and Engineering WUSE
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Wuhan University of Science and Engineering WUSE
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Abstract

The invention relates to a composite refractory material of Al8B4C7 and Al4O4C and a method for preparing the same. The adopted technical proposal is as follows: firstly, 20 to 30 weight percent of boron oxide, 20 to 40 weight percent of industrial carbon powder and 30 to 60 weight percent of metallic aluminium powder are mixed; and the mixture is added with 3 to 10 weight percent of bonding agent to be stirred for 5 to 25 minutes, is pressed to be shaped, and is dried for 12 to 36 hours under the condition of between 60 and 110 DEG C or naturally dried for 24 to 48 hours indoors; and secondly, the mixture is sintered for 2 to 6 hours under argon atmosphere and under the condition of between 1,400 and 1,800 DEG C, and is cooled naturally to obtain the composite refractory material of the Al8B4C7 and the Al4O4C. The composite refractory material has the characteristics of rich raw material resource, low production cost and easy industrialized production. The prepared composite refractory material of the Al8B4C7 and the Al4O4C not only has excellent performance, but also can prolong the service life.

Description

A kind of Al 8B 4C 7-Al 4O 4C matter composite refractory and preparation method thereof
Technical field
The invention belongs to the composite refractory technical field, be specifically related to a kind of Al 8B 4C 7-Al 4O 4C matter composite refractory and preparation method thereof.
Background technology
Al 8B 4C 7-Al 4O 4The multiple fire-resistant condensation material of C matter has good resistance to elevated temperatures and thermal stability, it is the raw material of the novel furnace lining material of preparation non-ferrous metal and steel smelting equipment, also be the antioxidant of the anti-oxidation of carbon containing refractory and Non oxide refractories, be particularly useful for producing ladle liner and the refining furnace lining of the clean steels such as mild steel and ultra-low-carbon steel; Al 8B 4C 7-Al 4O 4The multiple fire-resistant condensation material of C matter replaces the carbon composite refractory, is conducive to improve the quality of steel, has good result of use.
Al 8B 4C 7And Al 4O 4C has high-melting-point, high strength, low thermal coefficient of expansion and excellent anti-oxidant and hydration resistance, is a kind of high-temperature structural material and high-performance refractory material, also is the antioxidant of carbon containing refractory and Non oxide refractories.Synthesize at present Al both at home and abroad 8B 4C 7The main method of material is with B powder or B 4The C powder is compd A l 8B 4C 7Source and metal A l powder, C powder or the Al of middle B 4C 3Synthetic 1500-1800 ℃ of pyroreaction; Al 4O 4The C material mainly is Al 2O 3Powder and Al powder, C powder or Al 2O 3Powder and Al 4C 3Generate 1500～1800 ℃ of pyroreactions.Their synthetic costs are difficult to realize the industrialization of production than higher.
Summary of the invention
Task of the present invention provides that a kind of raw material resources are abundant, production cost is low and be easy to industrialized Al 8B 4C 7-Al 4O 4The preparation method of C matter composite refractory.With the standby Al of the party's legal system 8B 4C 7-Al 4O 4C matter composite refractory function admirable and service life prolong.
For realizing above-mentioned task, the technical solution adopted in the present invention is: earlier the boron oxide of 20～30wt%, the industrial carbon powder of 20～40wt% and the metallic aluminium powder of 30～60wt% are mixed, add the bond of said mixture 3～10wt%, stirred 5～25 minutes, compression moulding, under 60～110 ℃ of conditions dry 12～36 hours or Indoor Natural drying 24～48 hours; Under the condition of argon gas atmosphere and 1400～1800 ℃ * 2～6 hours, carry out sintering then, make Al through natural cooling 8B 4C 7-Al 4O 4C matter composite refractory.
Wherein: the B in the boron oxide 2O 3Content 〉=90wt%, particle diameter are 0.1～0mm; Al content 〉=the 90wt% of metallic aluminium powder, particle diameter are 0.1～0mm; C content 〉=the 80wt% of industrial carbon powder, particle diameter are 0.1～0mm; Bond or be in calcium lignosulfonate, sodium lignin sulfonate, lignosulfite, industrial dextrine powder, the polyvinyl alcohol more than one, or bond is phenolic resins.
Owing to adopt technique scheme, industrial carbon powder of the present invention, metallic aluminium powder and boron oxide wide material sources, the Al in the composite 8B 4C 7-Al 4O 4C is generated by boron oxide, metallic aluminium powder and C reaction at material internal, in conjunction with good, is conducive to improve the performance of material.Al 8B 4C 7-Al 4O 4C is not only very resistant to elevated temperatures material, has good anti-oxidant and slag resistance, and coefficient of thermal expansion is very low, can prevent that in use internal stress is excessive to be caused the cracking of furnace lining material and peel off owing to heating and cooling repeatedly produces.In addition, part A l at high temperature 8B 4C 7-Al 4O 4Borate glass is produced in the C oxidation, and the surface pore that can clog furnace lining material makes lining body material surface densified, stops oxygen to enter material internal on the one hand, and protective material is not oxidized; Stop on the other hand the infiltration of slag, slow down deteriorating of material, increase the service life.
Therefore, the present invention has the advantages that raw material resources are abundant, production cost is low and be easy to suitability for industrialized production.Al with the synthetic preparation of this method reaction 8B 4C 7-Al 4O 4C matter composite refractory is function admirable not only, and can increase the service life.The present invention is suitable for carbon containing refractory or Non oxide refractories uses as antioxidant, the novel furnace lining material that also is fit to preparation non-ferrous metal and steel smelting equipment, be particularly useful for producing ladle liner and the refining furnace lining of the clean steels such as low charcoal steel and ultra-low-carbon steel, be conducive to the raising of steel quality.
Specific embodiments
The present invention will be further described below in conjunction with embodiment, is not limiting the scope of the invention.
Embodiment 1
A kind of Al 8B 4C 7-Al 4O 4C matter composite refractory and preparation method thereof: earlier the boron oxide of 20～25wt%, the industrial carbon powder of 35～40wt% and the metallic aluminium powder of 40～45wt% are mixed, add the calcium lignosulfonate of said mixture 5～8wt%, calcium lignosulfonate is used further to batching after dissolving into earlier the aqueous solution; Stirred 5～15 minutes, compression moulding, drying is 12～24 hours under 90～110 ℃ of conditions; Under the condition of argon gas atmosphere and 1600～1700 ℃ * 5～6 hours, carry out sintering then, make Al through natural cooling 8B 4C 7-Al 4O 4C matter composite refractory.
The physical and chemical index of said mixture is: the B in the boron oxide 2O 3Content 〉=90wt%, particle diameter are 0.1～0mm; Al content 〉=the 90wt% of metallic aluminium powder, particle diameter are 0.1～0mm; C content 〉=the 80wt% of industrial carbon powder, particle diameter are 0.1～0mm.
Embodiment 2
A kind of Al 8B 4C 7-Al 4O 4C matter composite refractory and preparation method thereof: earlier the boron oxide of 25～30wt%, the industrial carbon powder of 30～35wt% and the metallic aluminium powder of 40～45wt% are mixed, add the sodium lignin sulfonate of said mixture 6～7wt%, sodium lignin sulfonate is used further to batching after dissolving into earlier the aqueous solution, stirred 10～20 minutes, compression moulding, drying is 18～30 hours under 90～110 ℃ of conditions; Sintering under argon gas atmosphere and under 1700～1800 ℃ * 5～6 hours condition makes Al through naturally cooling off then 8B 4C 7-Al 4O 4C matter composite refractory.
The physical and chemical index of said mixture is with embodiment 1.
Embodiment 3
A kind of Al 8B 4C 7-Al 4O 4C matter composite refractory and preparation method thereof: earlier the boron oxide of 25～30wt%, the industrial carbon powder of 25～30wt% and the metallic aluminium powder of 40～45wt% are mixed, add the lignosulfite of said mixture 3～6wt%, stirred 5～15 minutes, compression moulding, drying is 24～36 hours under 60～90 ℃ of conditions; Under the condition of argon gas atmosphere and 1500～1600 ℃ * 5～6 hours, carry out sintering then, make Al through natural cooling 8B 4C 7-Al 4O 4C matter composite refractory.
The physical and chemical index of said mixture is with embodiment 1.
Embodiment 4
A kind of Al 8B 4C 7-Al 4O 4C matter composite refractory and preparation method thereof: earlier the boron oxide of 25～30wt%, the industrial carbon powder of 30～35wt% and the metallic aluminium powder of 40～45wt% are mixed, add the industrial dextrine powder of said mixture 8～10wt%, stirred 5～15 minutes, compression moulding was Indoor Natural drying 24～26 hours; Under the condition of argon gas atmosphere and 1400～1500 ℃ * 5～6 hours, carry out sintering then, make Al through natural cooling 8B 4C 7-Al 4O 4C matter composite refractory.
The physical and chemical index of said mixture is with embodiment 1.
Embodiment 5
A kind of Al 8B 4C 7-Al 4O 4C matter composite refractory and preparation method thereof: earlier the boron oxide of 25～30wt%, the industrial carbon powder of 35～40wt% and the metallic aluminium powder of 35～40wt% are mixed, add the polyvinyl alcohol of said mixture 3～7wt%, stirred 15～25 minutes, compression moulding was Indoor Natural drying 36～48 hours; Under the condition of argon gas atmosphere and 1700～1800 ℃ * 2～3 hours, carry out sintering then, make Al through natural cooling 8B 4C 7-Al 4O 4C matter composite refractory.
The physical and chemical index of said mixture is with embodiment 1.
Embodiment 6
A kind of Al 8B 4C 7-Al 4O 4C matter composite refractory and preparation method thereof: earlier the boron oxide of 25～30wt%, the industrial carbon powder of 35～40wt% and the metallic aluminium powder of 30～35wt% are mixed, add the phenolic resins of said mixture 4～8wt%, stirred 5～15 minutes, compression moulding, drying is 12～24 hours under 90～110 ℃ of conditions; Carry out sintering in argon gas atmosphere with under 1750～1800 ℃ * 3～4 hours condition then, make Al through naturally cooling off 8B 4C 7-Al 4O 4C matter composite refractory.
The physical and chemical index of said mixture is with embodiment 1.
Embodiment 7
A kind of Al 8B 4C 7-Al 4O 4C matter composite refractory and preparation method thereof: earlier the boron oxide of 25～30wt%, the industrial carbon powder of 25～30wt% and the metallic aluminium powder of 45～50wt% are mixed, add industrial dextrine powder and the lignosulfite of said mixture 8～10wt%, stirred 15～25 minutes, compression moulding, drying is 24～36 hours under 80～110 ℃ of conditions; Under the condition of argon gas atmosphere and 1750～1800 ℃ * 4～6 hours, carry out sintering then, make Al through natural cooling 8B 4C 7-Al 4O 4C matter composite refractory.
The physical and chemical index of said mixture is with embodiment 1.
Embodiment 8
A kind of Al 8B 4C 7-Al 4O 4C matter composite refractory and preparation method thereof: earlier the boron oxide of 25～30wt%, the industrial carbon powder of 20～25wt% and the metallic aluminium powder of 50～55wt% are mixed, add sodium lignin sulfonate, lignosulfite and the industrial dextrine powder of said mixture 7～9wt%, stirred 10～20 minutes, compression moulding, drying is 24～36 hours under 60～80 ℃ of conditions; Under the condition of argon gas atmosphere and 1650～1750 ℃ * 4～6 hours, carry out sintering then, make Al through natural cooling 8B 4C 7-Al 4O 4C matter composite refractory.
The physical and chemical index of said mixture is with embodiment 1.
Embodiment 9
A kind of Al 8B 4C 7-Al 4O 4C matter composite refractory and preparation method thereof: earlier the boron oxide of 20～25wt%, the industrial carbon powder of 20～25wt% and the metallic aluminium powder of 55～60wt% are mixed, add industrial dextrine powder and the polyvinyl alcohol of said mixture 6～8wt%, stirred 5～15 minutes, compression moulding, drying is 24～36 hours under 90～110 ℃ of conditions; Under the condition of argon gas atmosphere and 1700～1750 ℃ * 2～4 hours, carry out sintering then, make Al through natural cooling 8B 4C 7-Al 4O 4C matter composite refractory.
The physical and chemical index of said mixture is with embodiment 1.
The raw material sources that this specific embodiment adopts are extensive, the Al in the composite 8B 4C 7-Al 4O 4C is generated by boron oxide, metallic aluminium powder and C reaction in inside, in conjunction with good, is conducive to improve the performance of material.Al 8B 4C 7-Al 4O 4C not only high temperature resistant, have good anti-oxidant and slag resistance, and coefficient of thermal expansion is very low, can prevent that in use internal stress is excessive to be caused the cracking of furnace lining material and peel off owing to heating and cooling repeatedly produces.In addition, part A l at high temperature 8B 4C 7-Al 4O 4Borate glass is produced in the C oxidation, and the surface pore that can clog furnace lining material makes lining body material surface densified, stops oxygen to enter material internal on the one hand, and protective material is not oxidized; Stop on the other hand the infiltration of slag, slow down deteriorating of material, increase the service life.
This embodiment has the advantages that raw material resources are abundant, production cost is low and be easy to suitability for industrialized production.Al with the synthetic preparation of this method reaction 8B 4C 7-Al 4O 4C matter composite refractory is function admirable not only, and can increase the service life.This specific embodiment is suitable for carbon containing refractory or Non oxide refractories uses as antioxidant, the novel furnace lining material that also is fit to preparation non-ferrous metal and steel smelting equipment, be particularly useful for producing ladle liner and the refining furnace lining of the clean steels such as low charcoal steel and ultra-low-carbon steel, be conducive to the raising of steel quality.

Claims (6)

1, a kind of Al 8B 4C 7-Al 4O 4The preparation method of C matter composite refractory is, it is characterized in that earlier the boron oxide of 20～30wt%, the industrial carbon powder of 20～40wt% and the metallic aluminium powder of 30～60wt% being mixed, add the bond of said mixture 3～10wt%, stirred 5～25 minutes, compression moulding, under 60～110 ℃ of conditions dry 12～36 hours or Indoor Natural drying 24～48 hours; Under the condition of argon gas atmosphere and 1400～1800 ℃ * 2～6 hours, carry out sintering then, make Al through natural cooling 8B 4C 7-Al 4O 4C matter composite refractory.
2, Al according to claim 1 8B 4C 7-Al 4O 4The preparation method of C matter composite refractory is characterized in that the B in the described boron oxide 2O 3Content 〉=90wt%, particle diameter are 0.1～0mm.
3, Al according to claim 1 8B 4C 7-Al 4O 4The preparation method of C matter composite refractory is characterized in that the Al content 〉=90wt% of described metallic aluminium powder, and particle diameter is 0.1～0mm.
4, Al according to claim 1 8B 4C 7-Al 4O 4The preparation method of C matter composite refractory is characterized in that the C content 〉=80wt% of described industrial carbon powder, and particle diameter is 0.1～0mm.
5, Al according to claim 1 8B 4C 7-Al 4O 4The preparation method of C matter composite refractory it is characterized in that described bond or be in the calcium lignosulfonate, sodium lignin sulfonate, lignosulfite, industrial dextrine powder, polyvinyl alcohol more than one, or bond is phenolic resins.
6, according to each described Al in the claim 1～5 8B 4C 7-Al 4O 4The prepared Al of preparation method of C matter composite refractory 8B 4C 7-Al 4O 4C matter composite refractory.
CNA2008101977422A 2008-11-20 2008-11-20 Al8B4C7-Al4O4C composite refractory materials and preparation method thereof Pending CN101423405A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101962726A (en) * 2010-11-15 2011-02-02 哈尔滨工业大学 Method for preparing composite material of pseudo-continuous netlike structure
CN102583424A (en) * 2012-02-16 2012-07-18 中国地质大学（北京） Al8B4C7 abrasive and preparation method thereof
CN103649009A (en) * 2011-09-02 2014-03-19 黑崎播磨株式会社 Aluminum oxycarbide composition and process for producing same, and refractory
CN104591760A (en) * 2015-02-11 2015-05-06 张婷 Burner preformed part for rotary kiln and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101962726A (en) * 2010-11-15 2011-02-02 哈尔滨工业大学 Method for preparing composite material of pseudo-continuous netlike structure
CN103649009A (en) * 2011-09-02 2014-03-19 黑崎播磨株式会社 Aluminum oxycarbide composition and process for producing same, and refractory
CN103649009B (en) * 2011-09-02 2016-08-17 黑崎播磨株式会社 Alumina carbide composition and manufacture method thereof and refractory body
CN102583424A (en) * 2012-02-16 2012-07-18 中国地质大学（北京） Al8B4C7 abrasive and preparation method thereof
CN104591760A (en) * 2015-02-11 2015-05-06 张婷 Burner preformed part for rotary kiln and preparation method thereof

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Open date: 20090506