CN102503470A - High thermal state breaking strength high alumina prefabticated member containing simple substance silicon - Google Patents
High thermal state breaking strength high alumina prefabticated member containing simple substance silicon Download PDFInfo
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- CN102503470A CN102503470A CN2011103295913A CN201110329591A CN102503470A CN 102503470 A CN102503470 A CN 102503470A CN 2011103295913 A CN2011103295913 A CN 2011103295913A CN 201110329591 A CN201110329591 A CN 201110329591A CN 102503470 A CN102503470 A CN 102503470A
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- prefab
- thermal state
- high thermal
- elemental silicon
- high alumina
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Abstract
The invention discloses a high thermal state breaking strength high alumina prefabticated member containing simple substance silicon. A preparation method of the prefabticated member is that the prefabticated member considers bauxite chamotte, the simple substance silicon and a binding agent as base materials, firstly a dispersing agent is added in the three base materials to be evenly stirred and mixed in a dry mode, then water is added to be evenly mixed the evenly-mixed materials to inject in a mould for vibration moulding, maintenance are carried out after moulded, the prefabticated member is roasted in a roasting kiln, the roasted prefabticated member is then roasted at high temperature and cooled to reach the room temperature after sintered to obtain the high thermal state breaking strength high alumina prefabticated member containing the simple substance silicon. The high thermal state breaking strength high alumina prefabticated member solves the problem that a common high alumina prefabticated member is poor in high-temperature behavior and high-temperature volume stability and the like and improves normal temperature strength, and the product of the high thermal state breaking strength high alumina prefabticated member has better high-temperature behavior, thermal shock stability and volume stability than the common high alumina prefabticated member.
Description
Technical field
The present invention relates to a kind of refractory materials, particularly relate to a kind of intensity of high thermal state high alumina matter prefab that contains elemental silicon.
Background technology
At present, refractory materials is main with oxide material and carbon composite mainly on material.Be that the main common fragility of refractory materials is bigger with the oxide compound, be difficult to satisfy simultaneously the requirement of HS and good thermal shock resistance.The carbon composite refractory is in oxide-based refractory materials, to introduce carbonaceous component such as graphite, improves the brittle purpose of oxide-based refractory materials thereby reach.But shortcoming such as this type of material exists that oxidation-resistance is poor, thermal conductivity is too high and use range is limited.On this basis, in oxide system, introduce metal A l, Si or Si
3N
4, non-oxidized substance phase such as Sialon way become a new research focus of fire resisting material field.
Numerous researchs show that oxide compound-non-oxidized substance matrix material has higher high temperature strength and antioxidant property, and good heat-shock resistance, erosion-resisting characteristics are expected to become the high-quality high-performance refractory material of new generation that the hot industry key position uses.
High alumina matter prefab adopts the prefabricated shaping of method of mould material usually, and individual product needs to burn till through high temperature again.The over-all properties of common high alumina matter prefab is not high enough, and for example: hot strength is low, fragility is big, is difficult to satisfy request for utilization, is of limited application, and added value of product is low.Therefore, the preform product of exploitation excellent performance, and controlled to the quality product realization, be a kind of approach of effective assurance user industry stably manufactured, also be the present urgent problem of refractories industry.
Summary of the invention
The technical problem that the present invention will solve provides a kind of intensity of high thermal state high alumina matter prefab that contains elemental silicon.That utilizes technical scheme of the present invention preparation contains elemental silicon intensity of high thermal state high alumina matter prefab, and its high-temperature behavior, thermal shock resistance and volume stability all are superior to common high alumina matter prefab.
In order to address the above problem, the technical scheme that the present invention adopts is:
The present invention provides a kind of intensity of high thermal state high alumina matter prefab that contains elemental silicon, and said intensity of high thermal state high alumina matter prefab is to be prepared from through following method:
A, raw material form: represent with weight percentage, contain alumine 80～90%, elemental silicon 1～10% and wedding agent 5～10% in the said raw material that contains elemental silicon intensity of high thermal state high alumina matter prefab; Said wedding agent is the mixture of any two or three kinds among hydrated aluminum oxide, aluminous cement and the silicon ash three, and the weight blending ratio the when three mixes is 1:1～2:1.5～3;
B, form according to the described raw material that contains elemental silicon intensity of high thermal state high alumina matter prefab of step a and to take by weighing various raw materials; Add dispersion agent in addition; The add-on of dispersion agent is 0.1～0.5% of a raw material gross weight described in the step a; Adopt stirrer dried mixed various raw materials and dispersion agent then, obtain doing mixed material to evenly;
C, dried the mixing that obtains at step b add the water that accounts for dried mixed material gross weight 6～8% in the material, stir, and inject mould then, on shaking table or by vibrating head vibratory compaction, obtain prefab after the moulding;
D, prefab that step c is obtained in mould in 25 ℃ of following maintenances of room temperature 1 day; The demoulding then again in 25 ℃ of following natural curings of room temperature 1 day, is put into roasting kiln with the prefab after the natural curing and is toasted after the demoulding; Storing temperature is 100～150 ℃, and storing time is 24～72 hours;
E, the prefab after the steps d baking is put into the high temperature kiln; Burn till at 1350～1500 ℃ of following high temperature; Soaking time is 16～48 hours when reaching 1350～1500 ℃, stops kiln after burning till, and is cooled to room temperature; Kiln discharge is rechecked and vanning, obtains the intensity of high thermal state high alumina matter prefab that product contains elemental silicon.
According to the above-mentioned intensity of high thermal state high alumina matter prefab that contains elemental silicon, Al in the alumine described in the step a
2O
3Content>=75%; Said alumine is that 8～5mm alumine 15～25%, 5～3mm alumine 10～20%, 3～1mm alumine 10～20%, 1～0.1mm alumine, 15～25%, 180 height of eye bauxitic clays 5～15% and 320 height of eye bauxitic clays 1～10% are formed by granularity.
According to the above-mentioned intensity of high thermal state high alumina matter prefab that contains elemental silicon, Si content >=98% in the elemental silicon described in the step a; Said elemental silicon is that granularity is the mixture of any or two kinds in 150 order elemental silicons and the 200 order elemental silicons; Mixed weight ratio during two kinds of mixing of said 150 order elemental silicons and 200 order elemental silicons is 1:1～3.
According to the above-mentioned intensity of high thermal state high alumina matter prefab that contains elemental silicon, dispersion agent described in the step b mixes 0.1～0.5% of material gross weight for mineral-type dispersion agent commonly used or organic type of dispersion agent commonly used, add-on for doing.
According to the above-mentioned intensity of high thermal state high alumina matter prefab that contains elemental silicon, said mineral-type dispersion agent commonly used is water glass, tripoly phosphate sodium STPP or Sodium hexametaphosphate 99.
According to the above-mentioned intensity of high thermal state high alumina matter prefab that contains elemental silicon, said organic type of dispersion agent commonly used is any in triethyl hexyl phosphoric acid, sodium lauryl sulphate, sodium laurylsulfonate and the SEPIGEL 305.
Positive beneficial effect of the present invention:
1, product of the present invention is on the basis of traditional high alumina matter prefab, to introduce elemental silicon, and high temperature burns till under the oxidizing atmosphere condition, and elemental silicon wherein at first oxidation generates highly active SiO
2, these highly active SiO
2Again can with the Al in the system
2O
3Reaction in taking place, generate the mullite phase of pin column decussate texture, thereby play the effect of reinforcing and toughening, helps to improve normal temperature performance, high-temperature behavior and the thermal shock resistance of product.Elemental silicon generates SiO under oxidizing atmosphere
2The reaction of oxidizing reaction and original position mullite all follow certain volumetric expansion, help improving product volume stability at high temperature.
2, product of the present invention has solved knotty problems such as common high alumina matter prefab high-temperature behavior is bad, high volume less stable, and has improved normal temperature strength.Performance of products of the present invention detects data and sees table 1 for details.
The technical feature of table 1 product of the present invention detects data
| Project | Index |
| Al 2O 3，% | ≥ 50 |
| Apparent porosity, % | ≤ 16 |
| Volume density, g/cm 3 | ≥ 2.45 |
| 1200 ℃ of hot modulus of rupture, MPa | ≥ 9 |
Embodiment:
Following examples have been merely and have further specified the present invention, do not limit content of the present invention.
Embodiment 1: a kind of intensity of high thermal state high alumina matter prefab that contains elemental silicon
The intensity of high thermal state high alumina matter prefab that the present invention contains elemental silicon is to be prepared from through following method:
A, raw material form: represent with weight percentage, contain alumine 87%, elemental silicon 3%, wedding agent 10% in the said raw material that contains elemental silicon intensity of high thermal state high alumina matter prefab;
Al in the said alumine
2O
3Content>=75%; Said alumine 87% is that 8～5mm alumine 20%, 5～3mm alumine 12%, 3～1mm alumine 16%, 1～0.1mm alumine 18%, 180 height of eye bauxitic clays 12% and 320 height of eye bauxitic clays 9% are formed by granularity;
Si content >=98% in the said elemental silicon, said elemental silicon are that granularity is 150 purpose elemental silicons;
Aluminous cement is 4% in the said wedding agent, and the silicon ash is 6%;
B, form according to the described raw material that contains elemental silicon intensity of high thermal state high alumina matter prefab of step a and to take by weighing various raw materials; Add the mineral-type sodium hexametaphosphate dispersant in addition; The dispersion agent add-on is 0.3% of a raw material gross weight described in the step a; Adopt stirrer dried mixed various raw materials and dispersion agent then, obtain doing mixed material to evenly;
C, do to mix to add in the material to account for to do and mix the material gross weight what step b obtained
8%Water stirs after adding entry, injects mould then, on shaking table or by vibrating head vibratory compaction, obtains prefab after the moulding;
D, prefab that step c is obtained in mould in 25 ℃ of following maintenances of room temperature 1 day; The demoulding then again in 25 ℃ of following natural curings of room temperature 1 day, is put into roasting kiln with the prefab after the natural curing and is toasted after the demoulding; Storing temperature is 120 ℃, and storing time is 40 hours;
E, the prefab after the steps d baking is put into the high temperature kiln, burn till at 1450 ℃ of following high temperature, soaking time is 24 hours when reaching 1450 ℃; Stop kiln after burning till; Be cooled to room temperature, kiln discharge is rechecked and vanning, obtains the intensity of high thermal state high alumina matter prefab that product contains elemental silicon.
Embodiment 2: basic identical with embodiment 1, difference is:
Step a: contain alumine 81%, elemental silicon 9%, wedding agent 10% in the said raw material that contains elemental silicon intensity of high thermal state high alumina matter prefab;
Al in the said alumine
2O
3Content>=75%; Said alumine 81% is that 8～5mm alumine 18%, 5～3mm alumine 17%, 3～1mm alumine 13%, 1～0.1mm alumine 20%, 180 height of eye bauxitic clays 8% and 320 height of eye bauxitic clays 5% are formed by granularity;
Si content >=98% in the said elemental silicon, said elemental silicon are that granularity is 200 purpose elemental silicons;
Aluminous cement is 5% in the said wedding agent, and hydrated aluminum oxide is 5%;
Step b: add the mineral-type pentasodium triphosphate of dispersing agent in addition, the add-on of dispersion agent is 0.4% of a raw material gross weight described in the step a;
Among the step c: in the dried mixed material that step b obtains, add to account for to do and mix the material gross weight
7%Water;
Steps d: the prefab after the natural curing is put into roasting kiln toast, storing temperature is 150 ℃, and storing time is 24 hours;
Step e: the prefab after the steps d baking is put into the high temperature kiln, burn till at 1400 ℃ of following high temperature, soaking time is 30 hours when reaching 1400 ℃.
Embodiment 3: basic identical with embodiment 1, difference is:
Step a: contain alumine 89%, elemental silicon 4%, wedding agent 7% in the said raw material that contains elemental silicon intensity of high thermal state high alumina matter prefab;
Al in the said alumine
2O
3Content>=75%; Said alumine 89% is that 8～5mm alumine 25%, 5～3mm alumine 20%, 3～1mm alumine 20%, 1～0.1mm alumine 15%, 180 height of eye bauxitic clays 5% and 320 height of eye bauxitic clays 4% are formed by granularity;
Si content >=98% in the said elemental silicon, said elemental silicon are the mixtures of 150 order elemental silicons and two kinds of materials of 200 order elemental silicons, and the blending ratio of the two is 1:1;
Aluminous cement is 3% in the said wedding agent, and the silicon ash is 4%;
Step b: add organic type of dispersion agent sodium lauryl sulphate in addition, the add-on of dispersion agent is 0.25% of a raw material gross weight described in the step a;
Among the step c: in the dried mixed material that step b obtains, add to account for to do and mix the material gross weight
6%Water;
Steps d: the prefab after the natural curing is put into roasting kiln toast, storing temperature is 100 ℃, and storing time is 48 hours;
Step e: the prefab after the steps d baking is put into the high temperature kiln, burn till at 1500 ℃ of following high temperature, soaking time is 16 hours when reaching 1500 ℃.
Embodiment 4: basic identical with embodiment 1, difference is:
Step a: contain alumine 80%, elemental silicon 10%, wedding agent 10% in the said raw material that contains elemental silicon intensity of high thermal state high alumina matter prefab;
Al in the said alumine
2O
3Content>=75%; Said alumine 80% is that 8～5mm alumine 15%, 5～3mm alumine 15%, 3～1mm alumine 10%, 1～0.1mm alumine 25%, 180 height of eye bauxitic clays 5% and 320 height of eye bauxitic clays 10% are formed by granularity;
Si content >=98% in the said elemental silicon, said elemental silicon are 200 orders;
Hydrated aluminum oxide is 3% in the said wedding agent, and aluminous cement is 3%, and the silicon ash is 6%;
Step b: add organic type of dispersion agent SEPIGEL 305 in addition, the add-on of dispersion agent is 0.5% of a raw material gross weight described in the step a;
Steps d: the prefab after the natural curing is put into roasting kiln toast, storing temperature is 110 ℃, and storing time is 36 hours;
Step e: the prefab after the steps d baking is put into the high temperature kiln, burn till at 1350 ℃ of following high temperature, soaking time is 48 hours when reaching 1350 ℃.
Claims (6)
1. an intensity of high thermal state high alumina matter prefab that contains elemental silicon is characterized in that, said intensity of high thermal state high alumina matter prefab is to be prepared from through following method:
A, raw material form: represent with weight percentage, contain alumine 80～90%, elemental silicon 1～10% and wedding agent 5～10% in the said raw material that contains elemental silicon intensity of high thermal state high alumina matter prefab; Said wedding agent is the mixture of any two or three kinds among hydrated aluminum oxide, aluminous cement and the silicon ash three, and the weight blending ratio the when three mixes is 1:1～2:1.5～3;
B, form according to the described raw material that contains elemental silicon intensity of high thermal state high alumina matter prefab of step a and to take by weighing various raw materials; Add dispersion agent in addition; The add-on of dispersion agent is 0.1～0.5% of a raw material gross weight described in the step a; Adopt stirrer dried mixed various raw materials and dispersion agent then, obtain doing mixed material to evenly;
C, dried the mixing that obtains at step b add the water that accounts for dried mixed material gross weight 6～8% in the material, stir, and inject mould then, on shaking table or by vibrating head vibratory compaction, obtain prefab after the moulding;
D, prefab that step c is obtained in mould in 25 ℃ of following maintenances of room temperature 1 day; The demoulding then again in 25 ℃ of following natural curings of room temperature 1 day, is put into roasting kiln with the prefab after the natural curing and is toasted after the demoulding; Storing temperature is 100～150 ℃, and storing time is 24～72 hours;
E, the prefab after the steps d baking is put into the high temperature kiln; Burn till at 1350～1500 ℃ of following high temperature; Soaking time is 16～48 hours when reaching 1350～1500 ℃, stops kiln after burning till, and is cooled to room temperature; Kiln discharge is rechecked and vanning, obtains the intensity of high thermal state high alumina matter prefab that product contains elemental silicon.
2. the intensity of high thermal state high alumina matter prefab that contains elemental silicon according to claim 1 is characterized in that: Al in the alumine described in the step a
2O
3Content>=75%; Said alumine is that 8～5mm alumine 15～25%, 5～3mm alumine 10～20%, 3～1mm alumine 10～20%, 1～0.1mm alumine, 15～25%, 180 height of eye bauxitic clays 5～15% and 320 height of eye bauxitic clays 1～10% are formed by granularity.
3. the intensity of high thermal state high alumina matter prefab that contains elemental silicon according to claim 1 is characterized in that: Si content >=98% in the elemental silicon described in the step a; Said elemental silicon is that granularity is the mixture of any or two kinds in 150 order elemental silicons and the 200 order elemental silicons; Mixed weight ratio during two kinds of mixing of said 150 order elemental silicons and 200 order elemental silicons is 1:1～3.
4. the intensity of high thermal state high alumina matter prefab that contains elemental silicon according to claim 1 is characterized in that: dispersion agent described in the step b mixes 0.1～0.5% of material gross weight for mineral-type dispersion agent commonly used or organic type of dispersion agent commonly used, add-on for doing.
5. according to the intensity of high thermal state high alumina matter prefab that contains elemental silicon according to claim 4, it is characterized in that: said mineral-type dispersion agent commonly used is water glass, tripoly phosphate sodium STPP or Sodium hexametaphosphate 99.
6. according to the intensity of high thermal state high alumina matter prefab that contains elemental silicon according to claim 4, it is characterized in that: said organic type of dispersion agent commonly used is any in triethyl hexyl phosphoric acid, sodium lauryl sulphate, sodium laurylsulfonate and the SEPIGEL 305.
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|---|---|---|---|
| CN2011103295913A CN102503470A (en) | 2011-10-26 | 2011-10-26 | High thermal state breaking strength high alumina prefabticated member containing simple substance silicon |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101602595A (en) * | 2009-06-30 | 2009-12-16 | 河南省耕生耐火材料有限公司 | Silicasol-combined corundum castable and prepare the method for abrasion-proof prefabricated component |
| CN101607829A (en) * | 2009-07-24 | 2009-12-23 | 河南省耕生耐火材料有限公司 | Silicon composite ultra-low creep deformation high alumina casting material |
| CN102173843A (en) * | 2011-02-24 | 2011-09-07 | 宜兴市泰科耐火材料有限公司 | Prefabricated part of coal injection pipe head |
-
2011
- 2011-10-26 CN CN2011103295913A patent/CN102503470A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101602595A (en) * | 2009-06-30 | 2009-12-16 | 河南省耕生耐火材料有限公司 | Silicasol-combined corundum castable and prepare the method for abrasion-proof prefabricated component |
| CN101607829A (en) * | 2009-07-24 | 2009-12-23 | 河南省耕生耐火材料有限公司 | Silicon composite ultra-low creep deformation high alumina casting material |
| CN102173843A (en) * | 2011-02-24 | 2011-09-07 | 宜兴市泰科耐火材料有限公司 | Prefabricated part of coal injection pipe head |
Non-Patent Citations (2)
| Title |
|---|
| 周安宏等: "添加Si粉改善高铝浇注料抗蠕变性能的研究", 《耐火材料》 * |
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Application publication date: 20120620 |