CN1740114A - Refractory Sialon corundum brick material for blast flurnace and its prepn process - Google Patents
Refractory Sialon corundum brick material for blast flurnace and its prepn process Download PDFInfo
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- CN1740114A CN1740114A CNA2004100607665A CN200410060766A CN1740114A CN 1740114 A CN1740114 A CN 1740114A CN A2004100607665 A CNA2004100607665 A CN A2004100607665A CN 200410060766 A CN200410060766 A CN 200410060766A CN 1740114 A CN1740114 A CN 1740114A
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Abstract
The refractory sialon corundum brick material for blast furnace is prepared with corundum grain and powder 60-75 wt%, metal silicon powder 5-12 wt%, metal aluminum powder 10-15 wt%, titania powder 1-8 wt%, alumina powder 3-9 wt%, silica powder 0-2 wt%, clay 0-2 wt% temporary paper pulp or phnolic resin binding agent 2-5 wt%, and through mixing, forming, drying, sintering at nitrogen atmosphere. The refractory sialon corundum brick material has excellent alkali resistance, excellent slag resistance, high heat shock stability, high wear resistance and excellent molten iron fuse loss resistance. The refractory sialon corundum brick material may be used widely for large and medium sized blast furnaces.
Description
One, technical field
The invention belongs to technical field of refractory materials.Relate in particular to a kind of blast furnace with matching grand corundum brick multiple phase refractory material and preparation method thereof.
Two, background technology
The blast furnace lining material has heat conduction method (thermal solution) and two schools of refractory materials method (refractorysolution)." heat conduction method " guarantees blast furnace campaign by powerful cooling stave.Because of its practicality, two various during the last ten years high heat conduction carbon refractories (as greying, semi-graphited, microporous carbon brick etc.) and the development of carbonization siliceous (as silicon nitride combined silicon carbide, Sailong and silicon carbide combined etc.) refractory materials are rapidly.But these materials thermosteresis in use are bigger, and cooling system is had relatively high expectations; " refractory materials method " is based on carbonaceous material and stupalith combines, and guarantees blast furnace longevity with high-quality refractory material.This mode is at the bottom of covering one deck high alumina refractories is used for State of Blast Furnace on traditional carbonaceous material, afterwards this low heat conductivity material (high alumina brick, corundum-mullite brick, brown corundum prefabricated section etc.) was expanded to cupola well, furnace bosh, bosh and shaft part with the lining Design thought that high, medium thermally conductive material combine from furnace bottom, make positions such as blast furnace hearth, furnace bottom obtain a specific Isothermal Line Distribution, guaranteed to smelt and normally carried out, also improve the temperature of molten iron, saved the energy significantly.
β-Sai Long (Si
6-zAl
zO
zN
8-z, z=0-4.2) have and Si
3N
4Similar structure and performance are as high physical strength, low thermal expansivity, good wear resistance and chemical stability.Corundum then has high-melting-point, low heat conduction and characteristics such as good slag resistance and wear resistance.Therefore, Sai Long and corundum are made multiple phase refractory material, and to be considered on performance to combine with β-Sai Long the SiC refractory materials similar, have good alkali-resistivity, slag resistance, anti-thermal shock stability and wear resistance, the low thermally conductive material (Li Yawei of a kind of high-quality for thermal conductivity lower (1000 ℃ of 3.5w/mK), Li Nan, Li Huaiyuan etc. No. 1 blast furnace overhaul dilatation of the Wuhan Iron and Steel Plant production and the use [J] of sialon combined corundum brick. refractory materials, 2001,35 (3): 35-38; Zhang Zhiping, Huang Huihuang﹠amp; Huang Zhaohui.Sialon bonded SiC Refractories for blast furnaces[J] .Interceram, 1993,42 (5): 292-297; Low conductivity blast furnace Refractories[J] .Steel Times, January 1993,1:49; Li Yawei, Li Nan, Wang Binyao. β-Sai Long (sialon)/corundum multiple phase refractory material research [J]. Journal of Inorganic Materials, 2000,15 (4): 612-617.), the shaft of large and medium-sized blast furnace, furnace bosh, bosh and cupola well position are applied in the world, and have a better effect.But along with the raising of blast furnace technology with prolong the refractory materials needs in work-ing life, the use properties of these materials has been difficult to satisfy the requirements at the higher level of blast furnace ironmaking, especially anti-molten iron melting loss aspect.And compare with β-Sai Long, silicon nitride, boron nitride and aluminum nitride and other nitride, titanium nitride is except above-mentioned nitride has high-melting-point, high rigidity, good chemical stability characteristics, its anti-molten iron melting loss performance is the best, should have a good application prospect in refractory materials.
Three, summary of the invention
The purpose of this invention is to provide that a kind of to have excellent anti-molten iron melting loss, heat-shock resistance, resistance to slag corrosion and alkali-resisting, titanium nitride grand to match and corundum be refractory materials of essentially consist and preparation method thereof, this refractory materials can be widely used in large and medium-sized blast furnace stack middle and lower part, furnace bosh, bosh and cupola well position.
For achieving the above object, the technical solution adopted in the present invention is: corundum in granules and fine powder, metallic silicon power, metallic aluminium powder, alumina powder, titanium dioxide powder, silicon dioxide powder, clay are mixed, add wedding agent, through mix, moulding, drying, the segmentation insulation is burnt till under nitrogen atmosphere.
Each above-mentioned weight percentages of components is: corundum in granules and fine powder are 60～75%, metallic silicon power is 5～12%, metallic aluminium powder is 10～15%, titanium dioxide powder is 1～8%, alumina powder is 3～9%, silicon dioxide powder is 0～2%, clay 0～2%, to add wedding agent be 2～5%.
Described corundum is compact alumina or brown corundum or fused white corundum, in 65～75% corundum, grain composition and weight percent thereof are: 5～3mm accounts for 15～20%, 3～1mm accounts for 20～25%, 1～0mm accounts for 15～20%, accounts for 0～20% less than 0.088mm.
Described wedding agent is temporary pulping liquor or temporary resol.
Processing condition of the present invention are: through mixing, moulding, drying, burning till under nitrogen atmosphere.The temperature range of burning till is room temperature～1500 ℃, used nitrogen is industrial nitrogen, and the segmentation insulation is to be incubated 12～24 hours under 1000 ℃～1300 ℃ conditions, is warmed up to 1400～1500 ℃ then, be incubated 5～10 hours with this understanding, 0.5～1 ℃/minute of temperature rise rate.
The present invention directly adds a certain amount of titanium dioxide and metallic aluminium powder in the batch mixing process of producing the grand corundum multiple phase refractory material of match, adopt the thermit reduction original position to generate titanium nitride, for adding pre-synthetic titanium nitride, technology is simple, cost of material cheaply, easily forms scale operation, simultaneously, aluminothermy reaction in formation titanium nitride is evenly distributed in product.
Because the grand corundum multiple phase refractory material of match has good alkali-resistivity, slag resistance, anti-thermal shock stability and wear resistance, and titanium nitride is except high-melting-point with non-oxidized substance, high rigidity, well the chemical stability characteristics, its anti-molten iron melting loss is the most obvious, so titanium nitride is introduced in the grand corundum multiple phase refractory material of match, be can further improve the resistance to slag corrosion and the anti-molten iron melting loss of the grand corundum multiple phase refractory material of match.Sai Long/titanium nitride/the corundum of the present invention's preparation relatively sees Table 1 with the anti-molten iron melting loss performance of the grand corundum multiple phase refractory material of match.
Two kinds of anti-molten iron melting losses of material of table 1 performance relatively
| Sai Long/corundum | Sai Long/titanium nitride/corundum | |
| Anti-molten iron melting loss index (%) | 0.43～0.60 | 0.05～0.15 |
Adopt the prepared refractory materials of the present invention, can make that blast furnace temperature control stabilization, molten iron temperature obviously improve, the capacity factor of a blast furnace obviously increases.
Four, embodiment
Embodiment 1:
A certain amount of fused brown corundum particle and fine powder, metallic aluminium powder, metallic silicon power, alumina powder and titanium dioxide powder are mixed.By weight percentage: fused brown corundum is 60～70%, metallic silicon power 8～10%, metallic aluminium powder 12～15%, alumina powder 3～9%, titanium dioxide are 2～8%, adds 2～5% temporary pulping liquors.Above-mentioned brown corundum in granules grating and weight percent are: 5～3mm accounts for 15～20%, 3～1mm accounts for 20～25%, 1～0mm accounts for 15～20%, accounts for 1～20% less than 0.088mm.Its processing condition are, mix in mixing pan, burn till under the nitrogen atmosphere in nitriding furnace through moulding, after dry, and used nitrogen is industrial nitrogen.Firing temperature is room temperature～1450 ℃, 0.5～1 ℃/minute of temperature rise rate, and the segmentation insulation is to be incubated 10～12 hours under 1200～1300 ℃ of conditions, is warmed up to 1400～1450 ℃ then, is incubated 5～7 hours with this understanding.Dispose, the main thing in the X-ray diffraction test article be mutually β-Sai Long, titanium nitride and corundum mutually, the grand content 10～40% of match wherein, titanium nitride content is 5～10%.Detecting its performance is volume density 3.00～3.30g/cm
3, apparent porosity 13～15%, compressive strength 100～200Mpa, high temperature break resistant intensity 20～30Mpa, thermal conductivity 3.0～5.0 (w/m.k), alkali-resistivity and anti-molten iron melting loss are good.
Embodiment 2:
Certain electric smelting compact alumina particle and fine powder, metallic aluminium powder, metallic silicon power, alumina powder, clay and titanium dioxide powder are mixed.By weight percentage: the electric smelting compact alumina is 60～70%, metallic silicon power 8～10%, metallic aluminium powder 12～15%, alumina powder 3～9%, titanium dioxide 2～8%, clay 0～2%, adds 2～5% temporary pulping liquor.Electric smelting compact alumina grain composition and weight ratio are: 5～3mm accounts for 15～20%, 3～1mm accounts for 20～25%, 1～0mm accounts for 15-20%, accounts for 1～20% less than 0.088mm.Its processing condition are to mix in mixing pan, burn till under the nitrogen atmosphere in nitriding furnace after moulding, drying.Firing range is room temperature～1450 ℃, the segmentation insulation, and 0.5～1 ℃/minute of temperature rise rate 1000～1100 ℃ of insulations 18～20 hours, is warmed up to 1400～1450 ℃ of insulations 8～10 hours then, and used nitrogen is industrial nitrogen.Dispose, the main thing in the X-ray diffraction test article be mutually β-Sai Long, titanium nitride and corundum mutually, the grand content 10～40% of match wherein, titanium nitride content is 5～10%.Detecting its performance is volume density 3.10～3.35g/cm
3, apparent porosity 13～15%, compressive strength 110～200Mpa, high temperature break resistant intensity 20～30Mpa, thermal conductivity 3.0～5.0 (w/m.k), alkali-resistivity and anti-molten iron melting loss are good.
Embodiment 3:
A certain amount of fused white corundum particle and fine powder are mixed with metallic aluminium powder, metallic silicon power, alumina powder, silicon dioxide powder and titanium dioxide powder.By weight percentage: fused white corundum is 60～70%, and metallic silicon power is 8～10%, metallic aluminium powder is 12～15%, alumina powder is 3～9%, titanium dioxide is 2～8%, silicon dioxide powder is 0.5～2%, adds 2～5% temporary pulping liquor.Above-mentioned fused white corundum grain composition and weight percent thereof are: 5～3mm accounts for 15～20%, 3～1mm accounts for 20-25%, 1～0mm and accounts for 15-20%, accounts for 1～20% less than 0.088mm.Its processing condition are to mix in mixing pan, burn till under the nitrogen atmosphere in nitriding furnace after moulding, drying, and used nitrogen is industrial nitrogen.Firing range is room temperature～1450 ℃, and the segmentation insulation is to be incubated 12～15 hours under 1100～1200 ℃ of conditions, is warmed up to 1400～1450 ℃ then, is incubated 6～8 hours with this understanding, 0.5～1 ℃/minute of temperature rise rate.Dispose, the main thing in the X-ray diffraction test article be mutually β-Sai Long, titanium nitride and corundum mutually, the grand content 10～40% of match wherein, titanium nitride content is 5～10%.Detecting its performance is volume density 2.99～3.25g/cm
3, apparent porosity 14～17%, compressive strength 100～180Mpa, high temperature break resistant intensity 20～30Mpa, thermal conductivity 3.0～5.0 (w/m.k), alkali-resistivity and anti-molten iron melting loss are good.
Claims (6)
1, a kind of blast furnace preparation method of the grand corundum brick refractory materials of match, it is characterized in that corundum in granules and fine powder, metallic silicon power, metallic aluminium powder, alumina powder, titanium dioxide powder, silicon dioxide powder, clay mix, add wedding agent, through mix, moulding, drying, the segmentation insulation is burnt till under nitrogen atmosphere.
2, blast furnace according to claim 1 is characterized in that described each weight percentages of components is with the preparation method of the grand corundum brick refractory materials of match: corundum in granules and fine powder are 60～75%, metallic silicon power is 5～12%, metallic aluminium powder is 10～15%, titanium dioxide powder is 1～8%, alumina powder is 3～9%, silicon dioxide powder is 0～2%, clay 0～2%, to add wedding agent be 2～5%.
3, the blast furnace according to claim 2 preparation method of the grand corundum brick refractory materials of match is characterized in that described corundum is: or compact alumina or brown corundum or fused white corundum; In 65～75% corundum, grain composition and weight percent thereof are: 5～3mm accounts for 15～20%, 3～1mm accounts for 20～25%, 1～0mm accounts for 15～20%, accounts for 0～20% less than 0.088mm.
4, blast furnace according to claim 1 is characterized in that with the preparation method of the grand corundum brick refractory materials of match described wedding agent is temporary pulping liquor or temporary resol.
5, the blast furnace according to claim 1 preparation method of the grand corundum brick refractory materials of match, it is characterized in that the temperature range of burning till under the described nitrogen atmosphere is room temperature～1500 ℃, used nitrogen is industrial nitrogen, the segmentation insulation is to be incubated 12～24 hours under 1000 ℃～1300 ℃ conditions, be warmed up to 1400～1500 ℃ then, be incubated 5～10 hours with this understanding, 0.5～1 ℃/minute of temperature rise rate.
6, according to the preparation method prepared refractory materials of the described blast furnace of claim 1～5 with the grand corundum brick refractory materials of match.
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| CN101798232A (en) * | 2009-12-22 | 2010-08-11 | 山东宇佳新材料有限公司 | Preparation method of Sialon-carbofrax-corundum composite refractory material |
| CN101654376B (en) * | 2009-08-26 | 2012-11-28 | 武汉科技大学 | Porous light heat-insulation and heat-preservation material and preparation method thereof |
| CN102924097A (en) * | 2012-11-01 | 2013-02-13 | 李富朝 | Carbon titanium combining self-protection brick for blast furnace hearth and furnace bottom |
| CN103553669A (en) * | 2013-10-25 | 2014-02-05 | 李明建 | Method for preparing Sialon material inside blast furnace |
| CN104478457A (en) * | 2014-12-29 | 2015-04-01 | 张婷 | Tap-hole clay for blast furnace of 2200m3 |
| WO2015058723A1 (en) * | 2013-10-25 | 2015-04-30 | 李明建 | Preparation method of blast furnace or iron runner sialon lining |
| CN106565250A (en) * | 2016-07-30 | 2017-04-19 | 许星星 | High-strength alkali-resistant sialon-corundum composite refractory material and preparation method thereof |
| CN107473719A (en) * | 2017-08-24 | 2017-12-15 | 浙江科屹耐火材料有限公司 | A kind of low carbon high-strength refractory material and its preparation technology |
| CN107986804A (en) * | 2017-12-11 | 2018-05-04 | 洛阳名力科技开发有限公司 | A kind of neutral refractory |
| CN108373337A (en) * | 2018-03-05 | 2018-08-07 | 北京利尔高温材料股份有限公司 | A kind of wear-resisting gunning refractory of blast furnace lining |
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| CN101654376B (en) * | 2009-08-26 | 2012-11-28 | 武汉科技大学 | Porous light heat-insulation and heat-preservation material and preparation method thereof |
| CN101798232B (en) * | 2009-12-22 | 2012-09-26 | 山东宇佳新材料有限公司 | Preparation method of Sialon-carbofrax-corundum composite refractory material |
| CN101798232A (en) * | 2009-12-22 | 2010-08-11 | 山东宇佳新材料有限公司 | Preparation method of Sialon-carbofrax-corundum composite refractory material |
| CN102924097A (en) * | 2012-11-01 | 2013-02-13 | 李富朝 | Carbon titanium combining self-protection brick for blast furnace hearth and furnace bottom |
| CN102924097B (en) * | 2012-11-01 | 2014-05-14 | 郑州安耐克实业有限公司 | Carbon titanium combining self-protection brick for blast furnace hearth and furnace bottom |
| WO2015058723A1 (en) * | 2013-10-25 | 2015-04-30 | 李明建 | Preparation method of blast furnace or iron runner sialon lining |
| CN103553669A (en) * | 2013-10-25 | 2014-02-05 | 李明建 | Method for preparing Sialon material inside blast furnace |
| CN104478457A (en) * | 2014-12-29 | 2015-04-01 | 张婷 | Tap-hole clay for blast furnace of 2200m3 |
| CN106565250A (en) * | 2016-07-30 | 2017-04-19 | 许星星 | High-strength alkali-resistant sialon-corundum composite refractory material and preparation method thereof |
| CN110023268A (en) * | 2016-12-28 | 2019-07-16 | 黑崎播磨株式会社 | The manufacturing method of the State of Blast Furnace bed portions and State of Blast Furnace bed portions brick of State of Blast Furnace bed portions brick and use State of Blast Furnace bed portions brick |
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| CN112094512A (en) * | 2020-08-25 | 2020-12-18 | 贵阳明通炉料有限公司 | High-performance sialon corundum coating and preparation method thereof |
| CN113336563A (en) * | 2021-05-21 | 2021-09-03 | 景德镇陶瓷大学 | Sialon whisker-corundum composite ceramic material using natural mineral as raw material, preparation method thereof and prepared product |
| CN115259841A (en) * | 2022-07-18 | 2022-11-01 | 辽宁科技大学 | Refractory material, preparation method, lining brick and hazardous waste disposal equipment |
| CN115636679A (en) * | 2022-11-03 | 2023-01-24 | 中钢洛耐科技股份有限公司 | Sialon corundum mullite for firing electronic ceramic kiln |
| CN115636679B (en) * | 2022-11-03 | 2023-08-11 | 中钢洛耐科技股份有限公司 | Sialon corundum mullite for firing electronic ceramic kiln |
| CN115466105A (en) * | 2022-11-14 | 2022-12-13 | 北京利尔高温材料股份有限公司 | Blast furnace iron tap channel main channel castable and preparation method thereof |
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