WO2009084484A1 - 炭化珪素質流し込み材 - Google Patents
炭化珪素質流し込み材 Download PDFInfo
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- WO2009084484A1 WO2009084484A1 PCT/JP2008/073217 JP2008073217W WO2009084484A1 WO 2009084484 A1 WO2009084484 A1 WO 2009084484A1 JP 2008073217 W JP2008073217 W JP 2008073217W WO 2009084484 A1 WO2009084484 A1 WO 2009084484A1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
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Definitions
- the present invention relates to a silicon carbide casting material used for a lining for blast furnace discharge.
- the blast furnace discharge is a flow path through which the hot metal discharged from the blast furnace outlet passes, and since it is susceptible to chemical erosion due to slag, etc., it is lined with a silicon carbide casting material excellent in corrosion resistance. Has been performed conventionally.
- Patent Document 1 discloses a high silicon carbide-containing amorphous refractory material containing 55 to 90% by mass of silicon carbide in a refractory material, which improves corrosion resistance.
- JP 2002-20177 A discloses a high silicon carbide-containing amorphous refractory material containing 55 to 90% by mass of silicon carbide in a refractory material, which improves corrosion resistance.
- an object of the present invention is to provide a silicon carbide casting material having excellent corrosion resistance and workability.
- the object of the present invention is characterized in that 0.1 to 2.5 parts by weight of kaolin clay is added as an outer coat to 100 parts by weight of refractory powder containing 60 to 95% by weight of silicon carbide. This is achieved with a silicon casting material.
- the silicon carbide casting material of the present embodiment is particularly suitable for lining for blast furnace discharge.
- This silicon carbide casting material contains 60 to 95% by weight of silicon carbide in the refractory powder. In order to obtain good corrosion resistance, a content of 60% by weight or more is necessary. On the other hand, when the content is higher than 95% by weight, the fluidity decreases and it is difficult to adjust other additives such as a binder. become.
- a commercially available silicon carbide can be used, and a silicon carbide having a purity of 90% or more is preferable. Moreover, it is preferable that silicon carbide has a particle size distribution from ultrafine powder to about 12 mm in order to increase the filling degree.
- the refractory powder includes, for example, refractory raw materials such as alumina, carbon raw materials such as pitch, graphite powder, and carbon black, binders such as alumina cement, antioxidants such as boron carbide, and metal silicon powder.
- binders such as alumina cement
- antioxidants such as boron carbide
- metal silicon powder A sintering aid such as can be added.
- the silicon carbide casting material of the present invention is characterized in that 0.1 to 2.5 parts by weight of kaolin-based clay is added as an outer cover to 100 parts by weight of the refractory powder. Good fluidity and oxidation resistance.
- Kaolin clay is a clay represented by the chemical formula Al2O3 ⁇ 2SiO2 ⁇ 2H2O, and can be exemplified by those mainly composed of minerals such as kaolinite, dickite, nacrite, halloysite, etc. Can also be used.
- the above silicon carbide casting material can be kneaded with water at the time of construction, and cast using a mold to form a blast furnace lining.
- a dispersant may be appropriately added to the refractory powder.
- the amount of kaolin clay added greatly affects the fluidity of the hydrated kneaded product. That is, when the amount is less than 0.1 parts by weight with respect to 100 parts by weight of the refractory powder, the effect of adding kaolin-based clay cannot be sufficiently obtained, and the necessary fluidity cannot be ensured. When the amount is too large, the viscosity tends to increase and the fluidity tends to decrease. Therefore, by making the amount of kaolin clay added in the above numerical range, it is possible to improve the workability while minimizing the amount of water added, and form a dense lining layer suitable for blast furnace tapping. be able to.
- the amount of kaolin clay added is most preferably about 1.5 parts by weight based on 100 parts by weight of the refractory powder.
- the silicon carbide casting material of the present invention can ensure fluidity by adding a small amount of kaolin-based clay, so that addition of finely divided silica is unnecessary, and from this point, corrosion resistance can be improved.
- the proportion (wt%) of silicon carbide in the refractory powder is three types of 60, 80, and 92.5, and the particle size of alumina that occupies the remainder of the blend and The ratio was adjusted.
- the result of measuring the flow value for a part of this kneaded product is shown in FIG.
- the flow value was measured according to JIS R 5201 (Cement physical test method).
- the flow value for performing the pouring work should be 120 or more.
- the results show good fluidity when the amount of kaolin clay added (outer coating) is in the range of 0.1 to 2.5 parts by weight with respect to 100 parts by weight of the refractory powder.
- the fluidity was particularly good at about 1.5 parts by weight.
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Abstract
Description
Claims (2)
- 炭化珪素を60~95重量%含む耐火性粉体100重量部に対し、カオリン系粘土0.1~2.5重量部を外掛けで添加したことを特徴とする炭化珪素質流し込み材。
- 炭化珪素を60~95重量%含む耐火性粉体100重量部に対し、カオリン系粘土約1.5重量部を外掛けで添加したことを特徴とする炭化珪素質流し込み材。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP08868744.7A EP2248788B1 (en) | 2007-12-28 | 2008-12-19 | Casting material based on silicon carbide |
CN200880123352.9A CN101910091B (zh) | 2007-12-28 | 2008-12-19 | 基于碳化硅的浇注料 |
BRPI0821485-9A BRPI0821485B1 (pt) | 2007-12-28 | 2008-12-19 | Material de fundição à base de carboneto de silício |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2007340358A JP5294624B2 (ja) | 2007-12-28 | 2007-12-28 | 炭化珪素質流し込み材 |
JP2007-340358 | 2007-12-28 |
Publications (1)
Publication Number | Publication Date |
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WO2009084484A1 true WO2009084484A1 (ja) | 2009-07-09 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2008/073217 WO2009084484A1 (ja) | 2007-12-28 | 2008-12-19 | 炭化珪素質流し込み材 |
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Country | Link |
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EP (1) | EP2248788B1 (ja) |
JP (1) | JP5294624B2 (ja) |
CN (1) | CN101910091B (ja) |
BR (1) | BRPI0821485B1 (ja) |
WO (1) | WO2009084484A1 (ja) |
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CN108117376A (zh) * | 2017-12-29 | 2018-06-05 | 黑龙江省寒地建筑科学研究院 | 一种烧结多孔砖的制备方法 |
CN108341656A (zh) * | 2017-01-23 | 2018-07-31 | 广东省生态环境技术研究所 | 一种阴极射线管玻璃无害化制备陶瓷的方法 |
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BRPI0821485B1 (pt) | 2019-08-20 |
JP2009161375A (ja) | 2009-07-23 |
CN101910091A (zh) | 2010-12-08 |
BRPI0821485A2 (pt) | 2015-09-08 |
EP2248788A4 (en) | 2012-04-25 |
EP2248788A1 (en) | 2010-11-10 |
JP5294624B2 (ja) | 2013-09-18 |
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CN101910091B (zh) | 2015-07-08 |
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