CN102718506A - Refractory composition for pure hydrogen atmosphere high temperature furnace - Google Patents
Refractory composition for pure hydrogen atmosphere high temperature furnace Download PDFInfo
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- CN102718506A CN102718506A CN201110080199XA CN201110080199A CN102718506A CN 102718506 A CN102718506 A CN 102718506A CN 201110080199X A CN201110080199X A CN 201110080199XA CN 201110080199 A CN201110080199 A CN 201110080199A CN 102718506 A CN102718506 A CN 102718506A
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- high temperature
- silicon carbide
- silicon nitride
- temperature furnace
- refractory
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Abstract
The invention relates to a high temperature heat treatment furnace, especially relates to a refractory composition for a pure hydrogen atmosphere high temperature furnace. The refractory composition is prepared by letting raw materials be subject to mixing, high-pressure forming and high temperature nitridation sintering, wherein the raw materials comprise 10-30 % of silicon powder, 0.1-5 % of medium-low temperature sintering agent, 1-10 % of binder, and the balance of refractory aggregate. The Si3N4-conjugated silicon carbide refractory material provided by the invention can be used in pure hydrogen atmosphere at the ambient temperature of higher than 1300 DEG C.
Description
Technical field
The present invention relates to refractory materials, relate in particular to the fire proofing composition that the metallurgy high temperature stove is used.
Background technology
The high-temperature ring stove is master operation and the equipment that silicon steel is produced and since ring furnace be perhydro atmosphere and temperature up to more than 1200 ℃, the fire-resistant strut member of its chassis is because of long-time bearing coil of strip weight well damage.At present in the HS high alumina brick refractory materials of the usefulness easy deterioration of performance in use; The table planeness and the levelness that cause supporting coil of strip occur than large deviation; Cause the coil of strip defective obviously to increase, can produce " impression " defective and " elephant pin " defective etc. in a large number like the band steel, the side cut amount of oriented silicon steel significantly increases, rejection number increases; Lumber recovery reduces, and ton steel cost significantly increases.Therefore be necessary high-temperature ring stove table is improved with anti-material, with raising silicon steel lumber recovery and table work-ing life.The silicon steel ring furnace will be towards low cost, long lifetime, low service direction development.
Silicon nitride combined silicon carbide material adds industrial silica fume by the SiC aggregate of synthetic, as Si and N
2At high temperature press 2N
2+ 3Si → Si
3N
4Reaction, the Si of generation
3N
4(matrix combination phase) is white crystal, and it can closely combine SiC particle (aggregate) effectively, forms spacial framework, thereby makes Si
3N
4Has the incomparable characteristic of some other refractory materialss in conjunction with the SiC material.
Yet because this material has the multicomponent mineral composition, chemicalstability is relatively poor, on the use field, is restricted.
Summary of the invention
The present invention is intended to address the above problem, and provides a kind of perhydro atmosphere high temperature furnace used fire proofing composition.The present invention can let silicon nitride combined silicon carbide material that chemical reaction does not take place under nitrogen atmosphere, makes material structure stable, reaches the purpose of life-time service.
For addressing the above problem, the high temperature furnace used fire proofing composition of a kind of perhydro atmosphere, it comprises the silica flour of the material of following weight percentage part: 10-30%; The low temperature sintering agent of 0.1-5%; The wedding agent of 1-10%; Surplus is a refractory aggregate, and said low temperature sintering agent comprises micro powder grade titanium slag, metallic aluminium, carbon dust, La
2O
3And Y
2O
3In one or more; Said wedding agent comprises one or more in phosphoric salt, resol or the refinery coke of sulfuric acid based salt, aluminium of silicic acid class salt sodium or aluminium, sodium, and said refractory aggregate comprises one or more in electric smelting black silicon carbide, electric smelting green silicon carbide, silicon nitride combined silicon carbide or the sintered silicon nitride.
The high temperature furnace used fire proofing composition of described a kind of perhydro atmosphere, said silica flour is the silicon single crystal micro mist of Si >=99%, meta (D50) 10-20 μ m.
Said refractory aggregate is the electric smelting silit of SiC>=99%, Si
3N
4The silicon nitride combined silicon carbide of+SiC>=95%, Si
3N
4In>=98% sintered silicon nitride one or more.
The present invention adopts Si
3N
4Based on silicon carbide is introduced aggregate and high-purity ultra micro powder of high-purity high-density degree, and is added the low-temperature sintering agent, thereby makes it in the time of 800～1000 ℃, form initial combination in the batching, form pyroceramic when being higher than 1400～1500 ℃ and combine Si
3N
4A series of premium propertiess such as carborundum refractory material has hot strength height, good thermal shock stability, chemicalstability is strong, thermal conductivity is big (thermal capacity is little) and thermal expansivity is low; These premium propertiess are to improving table work-ing life and silicon steel quality and lumber recovery, improve thermal conductivity great help is all arranged, and this material and suitable basically with HS high alumina brick cost.Therefore, the application of carborundum refractory on silicon steel annular High Temperature Furnaces Heating Apparatus table can keep the low cost of the table of anti-the material can prolong table work-ing life again, improve oriented silicon steel quality and lumber recovery, have strong actual value and meaning.
Embodiment
Below, in conjunction with embodiment the present invention is further described:
The high temperature furnace used fire proofing composition of a kind of perhydro atmosphere of the present invention, it comprises the silica flour of the material of following weight percentage part: 10-30%; The low temperature sintering agent of 0.1-5%; The wedding agent of 1-10%; Surplus is a refractory aggregate, and said low temperature sintering agent comprises micro powder grade titanium slag, metallic aluminium, carbon dust, La
2O
3And Y
2O
3In one or more; Said wedding agent comprises one or more in silicate, vitriol, phosphoric acid salt, resin or the refinery coke, and said refractory aggregate comprises one or more in electric smelting black silicon carbide, electric smelting green silicon carbide, silicon nitride combined silicon carbide or the sintered silicon nitride.
The high temperature furnace used fire proofing composition of described a kind of perhydro atmosphere, said refractory aggregate is high pure raw material, avoids impurity composition such as Fe
2O
3Deng issue biochemical reaction in nitrogen atmosphere.Said refractory aggregate is the electric smelting silit of SiC>=99%, Si
3N
4The silicon nitride combined silicon carbide of+SiC>=95%, Si
3N
4In>=98% sintered silicon nitride one or more.
Said silica flour is the silicon single crystal micro mist of Si>=99%, meso-position radius (D
50) 10-20 μ m.Silica flour is Si as a kind of component
3N
4Carborundum refractory material is able to produce the major cause of sintering and intensity.Add-on is lower than 10%, and the material sintering is relatively poor, and intensity is too low; Add-on is higher than 30%, and material is difficult to tight burning again, influences its high-temperature behavior.Therefore, silica flour content 10-30% of the present invention.
The low temperature sintering agent can make Si as a kind of agglomerated material that helps
3N
4Carborundum refractory material is sintering in the time of 1400～1500 ℃.Because the component of introducing is many, forms more low-melting material easily in the use and make the material use temperature reduce.Therefore low temperature sintering agent content of the present invention is 0.1-5%.
Wedding agent belongs to bond material, and their existence makes each component raw material after preparing burden, mixing, accomplish mechanical pressing, and adobe can produce higher-strength through subzero treatment, is beneficial to its high temperature and burns till.The wedding agent add-on is lower than 1%, and agglutinating intensity is low, is unfavorable for moulding; The wedding agent add-on is higher than 10%, because itself density is less, makes sintered density reduce, and then influences the material sintering strength.Therefore, wedding agent content 1-10% of the present invention.
Si
3N
4Refractory aggregate in the carborundum refractory material can be one or more in electric smelting black silicon carbide, electric smelting green silicon carbide, silicon nitride combined silicon carbide or the sintered silicon nitride, pays the utmost attention to well-crystallized, high-purity electric smelting silit of SiC>=99%.
Embodiment
| Component | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| Silica flour | 10 | 17 | 22 | 30 |
| The micro powder grade titanium slag | 0.05 | 2 | 4.5 | 1.0 |
| Aluminium powder | 0.05 | ? | 0.5 | 1 |
| Carbon dust | ? | 1.5 | 1.5 | ? |
| La 2O 3 | ? | 2 | 0.5 | 1 |
| Y 2O 3 | ? | ? | 1.0 | 2 |
| Silicon nitride combined silicon carbide | 61 | 50 | 30 | 25 |
| The electric smelting green silicon carbide | 8.9 | 20 | ? | 25 |
| Sintered silicon nitride | 15 | 3.5 | 30 | 14 |
| Water glass | 0.5 | ? | ? | 0.5 |
| Aluminum oxide | 0.5 | 1 | 2 | ? |
| Sodium sulfate | ? | 1 | ? | 0.25 |
| Sodium pyrosulfate | 2 | ? | 2 | ? |
| Phosphagel phosphaljel | ? | 1 | 2 | ? |
| Refinery coke | 1 | ? | 2 | 0.25 |
| Resol | 1 | 1 | 2 | ? |
According to above-mentioned prescription through prepare burden, mix, mechanical pressing, baking, the nitridation sintered refractory brick that forms carried out compatibility test under the atmospheric condition of silicon steel high-temperature ring ring border, i.e. 1300 ℃ of temperature in the stove, perhydro atmosphere is with 9 Si
3N
4The based on silicon carbide brick is placed on 4 weeks of actual motion, 6 weeks, 9 weeks in the stove, has carried out the physicochemical property check to its corresponding former brick of these 9 test bricks subsequently.Test result analysis shows, Si
3N
4After the use of different time of based on silicon carbide brick process, the Si in its brick body
3N
4+ SiC content does not have to change basically, and Si is described
3N
4The based on silicon carbide brick is stable components under existing ambiance condition, and the also increase to some extent (increasing～10%) of the compressive strength of brick body, and according to the related data analysis, the increase of brick body compressive strength is because the interior constantly H of variation of stove
2, N
2Atmosphere can be so that remaining metal Si be continued to be nitrided into Si in the brick body
3N
4, this makes that the combination of brick body is tightr, weave construction is more perfect.Therefore, Si of the present invention
3N
4Carborundum refractory material can in envrionment temperature more than 1300 ℃, be used safely under the perhydro atmosphere.
Claims (3)
1. the high temperature furnace used fire proofing composition of perhydro atmosphere is characterized in that it comprises the silica flour of the material of following weight percentage part: 10-30%; The low temperature sintering agent of 0.1-5%; The wedding agent of 1-10%; Surplus is a refractory aggregate, and said low temperature sintering agent comprises micro powder grade titanium slag, metallic aluminium, carbon dust, La
2O
3And Y
2O
3In one or more; Said wedding agent comprises one or more in phosphoric salt, resol or the refinery coke of sulfuric acid based salt, aluminium of silicic acid class salt sodium or aluminium, sodium, and said refractory aggregate comprises one or more in electric smelting black silicon carbide, electric smelting green silicon carbide, silicon nitride combined silicon carbide or the sintered silicon nitride.
2. the high temperature furnace used fire proofing composition of a kind of perhydro atmosphere according to claim 1 is characterized in that said silica flour is the silicon single crystal micro mist of Si >=99%, meso-position radius (D50) 10-20 μ m.
3. the high temperature furnace used fire proofing composition of a kind of perhydro atmosphere according to claim 1 is characterized in that said refractory aggregate is the electric smelting silit of SiC>=99%, Si
3N
4The silicon nitride combined silicon carbide of+SiC>=95%, Si
3N
4In>=98% sintered silicon nitride one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110080199XA CN102718506A (en) | 2011-03-31 | 2011-03-31 | Refractory composition for pure hydrogen atmosphere high temperature furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110080199XA CN102718506A (en) | 2011-03-31 | 2011-03-31 | Refractory composition for pure hydrogen atmosphere high temperature furnace |
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|---|---|
| CN102718506A true CN102718506A (en) | 2012-10-10 |
Family
ID=46944413
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|---|---|---|---|
| CN201110080199XA Pending CN102718506A (en) | 2011-03-31 | 2011-03-31 | Refractory composition for pure hydrogen atmosphere high temperature furnace |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106631069A (en) * | 2016-12-29 | 2017-05-10 | 辽宁久星钛业有限责任公司 | Titanium carbon based hot stamping material as well as preparation method and application thereof |
| CN106631070A (en) * | 2016-12-29 | 2017-05-10 | 辽宁久星钛业有限责任公司 | Titanium carbon based cold stamping material as well as preparation method and application thereof |
| CN109608209A (en) * | 2018-12-21 | 2019-04-12 | 郑州安联凯实业有限公司 | A kind of production method of high thermal conductivity high abrasion refractory material |
| CN112341219A (en) * | 2020-11-06 | 2021-02-09 | 鞍山市和丰耐火材料有限公司 | Environment-friendly converter fettling sand using schreyerite as sintering agent and production method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219902A (en) * | 2007-11-16 | 2008-07-16 | 攀枝花顺腾集团冶金材料有限公司 | Environment-protection dry type vibrating material and production method thereof |
| CN101591187A (en) * | 2009-03-19 | 2009-12-02 | 宜兴新威利成耐火材料有限公司 | High strength silicon nitride combined silicon carbide material and preparation method thereof |
-
2011
- 2011-03-31 CN CN201110080199XA patent/CN102718506A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101219902A (en) * | 2007-11-16 | 2008-07-16 | 攀枝花顺腾集团冶金材料有限公司 | Environment-protection dry type vibrating material and production method thereof |
| CN101591187A (en) * | 2009-03-19 | 2009-12-02 | 宜兴新威利成耐火材料有限公司 | High strength silicon nitride combined silicon carbide material and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106631069A (en) * | 2016-12-29 | 2017-05-10 | 辽宁久星钛业有限责任公司 | Titanium carbon based hot stamping material as well as preparation method and application thereof |
| CN106631070A (en) * | 2016-12-29 | 2017-05-10 | 辽宁久星钛业有限责任公司 | Titanium carbon based cold stamping material as well as preparation method and application thereof |
| CN106631070B (en) * | 2016-12-29 | 2019-05-24 | 辽宁久星钛业有限责任公司 | A kind of titanium carbon base is cold to make material and its preparation method and application firm by ramming |
| CN106631069B (en) * | 2016-12-29 | 2019-05-24 | 辽宁久星钛业有限责任公司 | A kind of titanium carbon base heat makes material and its preparation method and application firm by ramming |
| CN109608209A (en) * | 2018-12-21 | 2019-04-12 | 郑州安联凯实业有限公司 | A kind of production method of high thermal conductivity high abrasion refractory material |
| CN112341219A (en) * | 2020-11-06 | 2021-02-09 | 鞍山市和丰耐火材料有限公司 | Environment-friendly converter fettling sand using schreyerite as sintering agent and production method thereof |
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Address after: 201900 Shanghai city Baoshan District Meipu Road No. 335 Applicant after: SHANGHAI BAOSTEEL INDUSTRY TECHNOLOGICAL SERVICE Co.,Ltd. Address before: 201900 Shanghai city Baoshan District Meipu Road No. 335 Applicant before: Shanghai Baosteel Industrial Inspection Co.,Ltd. Address after: 201900 Shanghai city Baoshan District Meipu Road No. 335 Applicant after: Shanghai Baosteel Industrial Inspection Co.,Ltd. Address before: 201900 Shanghai city Baoshan District Meipu Road No. 335 Applicant before: Shanghai Baosteel Industry Inspection Corp. |
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Application publication date: 20121010 |