CN102584295B - Special pouring material for coal injection pipe - Google Patents
Special pouring material for coal injection pipe Download PDFInfo
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- CN102584295B CN102584295B CN 201210048028 CN201210048028A CN102584295B CN 102584295 B CN102584295 B CN 102584295B CN 201210048028 CN201210048028 CN 201210048028 CN 201210048028 A CN201210048028 A CN 201210048028A CN 102584295 B CN102584295 B CN 102584295B
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Abstract
The invention discloses a special pouring material for a kiln opening and belongs to the field of a refractory material. The special pouring material comprises the following components by weight percent: 10-25% of silicon carbide, 15-30% of andalusite, 20-35% of corundum, 5-15% of spinel powder, 5-10% of zircon mullite powder, 5-15% of aluminum oxide micro powder, 3-8% of silicon micro powder, 2-5% of pure calcium aluminate cement, and 0.5% and 0.2% of anti-explosion fibers and sodium tripolyphosphate serving as additives. The special pouring material is capable of efficiently improving the wear resistance and avoiding the hot peeling phenomenon of the cement kiln coal injection pipe, has the characteristics of high temperature resistance, heat vibration resistance, wear resistance, high strength, irreversible micro inflation, and the like, and is capable of greatly prolonging the service life of the cement kiln coal injection pipe.
Description
Technical field
The present invention relates to fire resisting material field, be specifically related to a kind of Special pouring material for coal injection pipe.
Background technology
China's new type nonaqueous cement production line development at present is rapid, so the use of refractory materials is had higher requirement.New dry cement production technology has extensively adopted raising intensity of combustion, enhancement of heat transfer effect, has reduced the new technologies such as heat lost by radiation and reduction environmental pollution, and the manufacture of cement level has been risen to a brand-new stage.Yet owing to bearing higher temperature, temperature variation more sharply, stronger chemical erosion and the effect of harsher mechanical stress, new type nonaqueous cement production line needs to have the refractory materials of excellent properties more.
The cement kiln coal injection pipe environment for use is abominable, coal injection pipe will be inserted into the inside of cement kiln, be subject to the high-temperature material of motion in cement kiln and washing away of high temperature hot gas stream, and will stand from the next secondary air of grate-cooler, so coal injection pipe must have good wear resistance, chemical resistance of concrete and good thermal shock performance.Due to above-mentioned harsher Working environment, coal injection pipe castable result of use all the time is all undesirable, and the life-span is all shorter, is restricting to a certain extent the normal operation of cement kiln, has affected the economic benefit of cement producer.Therefore, Main Refractory producer all improves technology constantly exploring new coal injection pipe refractory materials, and has obtained certain achievement.It is mould material (as patent CN101805195A), corundum-spinel castable (as patent CN101445379B) that present coal injection pipe castable is mainly aluminum/silicon carbide, spinel pouring material (as patent CN101514109B): patent CN101805195A aluminum/silicon carbide is that mould material is added ultrafine silica powder and silicon carbide in high aluminium material, improved the heat-shock resistance of material etc., extend its work-ing life, and patent CN101445379B adds Al in material
2O
3Powder and aluminium riched spinel fine powder have higher high temperature break resistant intensity, have also obtained certain result of use on coal injection pipe.Patent CN101514109B is take the rafifinal magnesia spinel as main raw material, adds the aluminum oxide super-fine powder, high refractoriness, high thermal shock resistance, strong alkali-resistivity, high strength, resistance to wear etc. several aspect the coordinating and unifying.The Application and Development of these New Products ﹠ New Technologies, bring up to present 6 ~ 8 month from before 3 ~ 4 months the work-ing life that makes coal injection pipe.But still can not meet customer need, special in the more abominable cement kiln of some environments for use, present cement kiln coal injection pipe castable is not wear-resisting, easy thermal spalling, has seriously restricted the raising of cement kiln production line rate, affects the economic benefit of the cement producer that knows clearly.
Summary of the invention
The object of the invention is effectively to improve the not wear-resisting of coal injection pipe, the generation of the phenomenons such as thermal spalling, provide a kind of have high temperature resistant, anti-thermal shock, wear-resisting, high-strength, the characteristics such as microdilatancy is irreversible can extend the coal injection pipe Special pouring material for coal injection pipe in work-ing life greatly.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs: a kind of Special pouring material for coal injection pipe, and it comprises the component of following weight percentage:
Silicon carbide 10 ~ 25%
Andaluzite 15 ~ 30%
Corundum 20 ~ 35%
Spinel powder 5 ~ 15%
Zirconium mullite powder 5 ~ 10%
Alumina powder 5 ~ 15%
Silicon powder 3 ~ 8%
Pure calcium aluminate cement 2 ~ 5%
And account for the explosion-proof fiber of said components gross weight 0.5% and 0.2% tripoly phosphate sodium STPP.
As an optimal way of the present invention, the weight percentage of the contained component of described Special pouring material for coal injection pipe is:
Silicon carbide 10 ~ 15%
Andaluzite 20 ~ 25%
Corundum 25 ~ 35%
Spinel powder 10 ~ 15%
Zirconium mullite powder 6 ~ 8%
Alumina powder 5 ~ 10%
Silicon powder 5 ~ 8%
Pure calcium aluminate cement 3 ~ 5%
And account for the explosion-proof fiber of said components gross weight 0.5% and 0.2% tripoly phosphate sodium STPP.
As another optimal way of the present invention, the weight percentage of the contained component of described Special pouring material for coal injection pipe is:
Silicon carbide 15 ~ 20%
Andaluzite 20 ~ 25%
Corundum 20 ~ 25%
Spinel powder 5 ~ 10%
Zirconium mullite powder 9%
Alumina powder 12%
Silicon powder 4%
Pure calcium aluminate cement 5%
And account for the explosion-proof fiber of said components gross weight 0.5% and 0.2% tripoly phosphate sodium STPP.
As another optimal way of the present invention, the weight percentage of the contained component of described Special pouring material for coal injection pipe is:
Silicon carbide 22%
Andaluzite 18%
Corundum 22%
Spinel powder 8%
Zirconium mullite powder 6%
Alumina powder 14%
Silicon powder 6%
Pure calcium aluminate cement 4%
And account for the explosion-proof fiber of said components gross weight 0.5% and 0.2% tripoly phosphate sodium STPP.
The technical indicator of Special castable for kiln outlet of the present invention is as follows:
In sum, the present invention compared with prior art, mould material of the present invention is comprised of materials such as silicon carbide, andaluzite, corundum, spinel powder, zirconium mullite powder, alumina powders, be the irreversible mould material of microdilatancy, be conducive to reduce material internal stress at high temperature, seismic stability, high thermal resistance, volume stability and the wear resistance of material have been improved, and has a high strength, improved the not wear-resisting of coal injection pipe, the defectives such as thermal spalling make bring up to 10 ~ 12 months by existing about 6 ~ 8 months the work-ing life of cement kiln coal injection pipe.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail.This specific embodiment is only explanation of the invention; it is not the restriction to invention; those skilled in the art can make any modification to the present embodiment as required after reading this specification sheets, but as long as all are subject to the protection of patent law in claim scope of the present invention.
Embodiment 1
A kind of Special pouring material for coal injection pipe, the weight percentage of its contained component is:
Silicon carbide 10%
Andaluzite 30%
Corundum 20%
Spinel powder 15%
Zirconium mullite powder 10%
Alumina powder 10%
Silicon powder 3%
Pure calcium aluminate cement 2%
And account for the explosion-proof fiber of said components gross weight 0.5% and 0.2% tripoly phosphate sodium STPP.
Embodiment 2
A kind of Special pouring material for coal injection pipe, the weight percentage of its contained component is:
Silicon carbide 25%
Andaluzite 15%
Corundum 35%
Spinel powder 5%
Zirconium mullite powder 5%
Alumina powder 5%
Silicon powder 6%
Pure calcium aluminate cement 4%
And account for the explosion-proof fiber of said components gross weight 0.5% and 0.2% tripoly phosphate sodium STPP.
Embodiment 3
A kind of Special pouring material for coal injection pipe, the weight percentage of its contained component is:
Silicon carbide 15%
Andaluzite 20%
Corundum 29%
Spinel powder 10%
Zirconium mullite powder 6%
Alumina powder 7%
Silicon powder 8%
Pure calcium aluminate cement 5%
And account for the explosion-proof fiber of said components gross weight 0.5% and 0.2% tripoly phosphate sodium STPP.
Embodiment 4
A kind of Special pouring material for coal injection pipe, the weight percentage of its contained component is:
Silicon carbide 18%
Andaluzite 22%
Corundum 22%
Spinel powder 8%
Zirconium mullite powder 9%
Alumina powder 12%
Silicon powder 4%
Pure calcium aluminate cement 5%
And account for the explosion-proof fiber of said components gross weight 0.5% and 0.2% tripoly phosphate sodium STPP.
Embodiment 5
Silicon carbide 22%
Andaluzite 18%
Corundum 22%
Spinel powder 8%
Zirconium mullite powder 6%
Alumina powder 14%
Silicon powder 6%
Pure calcium aluminate cement 4%
And account for the explosion-proof fiber of said components gross weight 0.5% and 0.2% tripoly phosphate sodium STPP.
Embodiment 6
Silicon carbide 12%
Andaluzite 25%
Corundum 25%
Spinel powder 5%
Zirconium mullite powder 8%
Alumina powder 15%
Silicon powder 6%
Pure calcium aluminate cement 4%
And account for the explosion-proof fiber of said components gross weight 0.5% and 0.2% tripoly phosphate sodium STPP.
each component used in above-described embodiment is to well known to a person skilled in the art product, all can buy on market, the wherein interpolation of corundum, the wear resistance that is conducive to mould material, and the compound rear generation alkali resistance of the aluminium silicon in silicon carbide and material, andaluzite has micro-expansibility, be used for improving the thermal shock resistance of mould material, guarantee its high volume stability, avoid the mould material cracking, the phenomenon such as drop, add simultaneously spinel powder, the zirconium mullite powder, alumina powder, greatly improved the over-all properties of mould material, make to extend to 10 ~ 12 months the work-ing life of mould material.
The Special pouring material for coal injection pipe of above-described embodiment 1 ~ 6 prepares by the following method: with each component and admixture mixing and stirring, then add appropriate water mixing strong stirring even, more then moulding, use after conventional maintenance and baking.
Comparative Examples 1
Embodiment 1 in patent CN101445379B corundum-spinel coal injection pipe castable in background technology comprises the component of following quality percentage composition:
Sintering plate corundum 5 ~ 8mm 10%
Sintering plate corundum 3 ~ 5mm 10%
Sintering plate corundum 1 ~ 3mm 6%
Sintering mullite synthesizing 5 ~ 8mm 10%
Sintering mullite synthesizing 3 ~ 5mm 8%
Sintering mullite synthesizing 1 ~ 3mm 10%
Chromium corundum 0 ~ 1mm 12%
Silicon carbide 200 orders following 8%
Silicon carbide super-fine powder 4 μ m following 3%
Magnesium-aluminium spinel 0 ~ 1mm 3%
Zircon sand 0.2 ~ 0.3mm 4%
Active A l
2O
3Micro mist 4 μ m following 3%
Silicon powder 4%
Pure calcium aluminate cement 4%
Synthetic zirconium mullite is abrasive dust 5% altogether
(adding) Stainless Steel Fibre 1.5%
(adding) compound additive 0.12%
(adding) explosion-proof fiber 0.1%
Comparative Examples 2
Embodiment in patent CN101514109B corundum-spinel coal injection pipe castable in background technology, the weight percent of each feed composition is:
Spinel particle 5 ~ 8mm 20 ~ 25%
Spinel particle 3 ~ 5mm 20 ~ 30%
Spinel particle 1 ~ 0mm 20 ~ 25%
Spinel fine powder＜0.045mm 8 ~ 15%
Alumina powder 3 ~ 5 μ m 7 ~ 10%
Alumina powder＜2 μ m 1 ~ 4%
Magnesia powder＜0.088mm 2 ~ 4%
Pure calcium aluminate cement 6 ~ 10%
The addition of admixture is:
Poly-phosphate 0.1%
Polyoxyethylene glycol 0.08%
Poly carboxylic acid ether 0.03%
Above-described embodiment 1 ~ 6 relatively sees the following form with the physical index of Comparative Examples 1 ~ 2:
Claims (3)
1. a Special pouring material for coal injection pipe, is characterized in that, the weight percentage of its contained component is:
Silicon carbide 10 ~ 15%
Andaluzite 20 ~ 25%
Corundum 25 ~ 35%
Spinel powder 10 ~ 15%
Zirconium mullite powder 6 ~ 8%
Alumina powder 5 ~ 10%
Silicon powder 5 ~ 8%
Pure calcium aluminate cement 3 ~ 5%
And account for the explosion-proof fiber of said components gross weight 0.5% and 0.2% tripoly phosphate sodium STPP.
2. a Special pouring material for coal injection pipe, is characterized in that, the weight percentage of its contained component is:
Silicon carbide 15 ~ 20%
Andaluzite 20 ~ 25%
Corundum 20 ~ 25%
Spinel powder 5 ~ 10%
Zirconium mullite powder 9%
Alumina powder 12%
Silicon powder 4%
Pure calcium aluminate cement 5%
And account for the explosion-proof fiber of said components gross weight 0.5% and 0.2% tripoly phosphate sodium STPP.
3. a Special pouring material for coal injection pipe, is characterized in that, the weight percentage of its contained component is:
Silicon carbide 22%
Andaluzite 18%
Corundum 22%
Spinel powder 8%
Zirconium mullite powder 6%
Alumina powder 14%
Silicon powder 6%
Pure calcium aluminate cement 4%
And account for the explosion-proof fiber of said components gross weight 0.5% and 0.2% tripoly phosphate sodium STPP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210048028 CN102584295B (en) | 2012-02-29 | 2012-02-29 | Special pouring material for coal injection pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210048028 CN102584295B (en) | 2012-02-29 | 2012-02-29 | Special pouring material for coal injection pipe |
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| Publication Number | Publication Date |
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| CN102584295A CN102584295A (en) | 2012-07-18 |
| CN102584295B true CN102584295B (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN103836916A (en) * | 2012-11-21 | 2014-06-04 | 宜兴市泰科耐火材料有限公司 | Novel special coal-injection duct head prefabricated part of dry process cement rotary kiln |
| CN103086729A (en) * | 2013-02-26 | 2013-05-08 | 西安秦翔科技股份有限公司 | Furnace lining pouring material composition for pressure pouring furnace |
| CN103265299A (en) * | 2013-04-17 | 2013-08-28 | 无锡远能耐火材料有限公司 | Andalusite corundum gunning mix |
| CN103553667A (en) * | 2013-10-25 | 2014-02-05 | 宁夏天纵泓光余热发电技术有限公司 | Special casting material of coal-injection duct |
| CN105314989A (en) * | 2014-07-17 | 2016-02-10 | 郑州大学 | Fireproof gunning material for working lining of foundry ladle and preparation method thereof |
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| CN104177105B (en) * | 2014-08-29 | 2016-04-27 | 长兴兴鹰新型耐火建材有限公司 | A kind of coal injection pipe castable and preparation method thereof |
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| CN105819874A (en) * | 2014-12-01 | 2016-08-03 | 张婷 | Castable special for 5000T cement kiln coal-injection duct |
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| CN105801096A (en) * | 2014-12-01 | 2016-07-27 | 张婷 | Pouring material special for coal-injection duct of cement kiln of 12,000 T |
| CN105837228B (en) * | 2014-12-01 | 2018-06-29 | 泉州市永工艺品研究有限公司 | A kind of Special pouring material for coal injection pipe |
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| CN105237018B (en) * | 2015-11-19 | 2018-01-05 | 长兴兴鹰新型耐火建材有限公司 | A kind of wear-resisting anti-erosion castable of triple air hose of cement kiln |
| CN105526804A (en) * | 2016-01-07 | 2016-04-27 | 无锡远能耐火材料有限公司 | Andalusite corundum anti-dropping gunning refractory |
| CN106927838B (en) * | 2017-02-17 | 2020-04-17 | 北京兰海金诚耐火材料有限责任公司 | Steel fiber reinforced wear-resistant explosion-proof castable |
| CN111978089B (en) * | 2020-08-21 | 2022-05-27 | 浙江锦诚新材料股份有限公司 | Dry-type spray coating for coal injection pipe and preparation method thereof |
| CN112608160B (en) * | 2020-12-31 | 2022-11-11 | 长兴兴鹰新型耐火建材有限公司 | High-strength wear-resistant castable special for cement kiln flashboard |
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| US5932506A (en) * | 1998-02-23 | 1999-08-03 | Bogan; Jeffrey E. | Alumina-silicon carbide-carbon refractory castable containing magnesium aluminate spinel |
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| CN102584295A (en) | 2012-07-18 |
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Address after: 313100 new industrial park, pheasant City, Huzhou, Zhejiang, Changxing County Patentee after: Zhejiang Jincheng new material Limited by Share Ltd Address before: 313100 new industrial park, pheasant City, Huzhou, Zhejiang, Changxing County Patentee before: Zhejiang Jincheng Refractories Co., Ltd. |