CN104761268A - Homogenized corundum refractory castable and preparation method thereof - Google Patents
Homogenized corundum refractory castable and preparation method thereof Download PDFInfo
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- CN104761268A CN104761268A CN201510121809.4A CN201510121809A CN104761268A CN 104761268 A CN104761268 A CN 104761268A CN 201510121809 A CN201510121809 A CN 201510121809A CN 104761268 A CN104761268 A CN 104761268A
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Abstract
The invention discloses a homogenized corundum refractory castable and a preparation method thereof, and belongs to the technical filed of high temperature refractory materials. The homogenized corundum refractory castable comprises the following raw materials, by mass, 15-25% of homogenized corundum with the particle size of greater than 5mm and not greater than 8mm, 10-20% of homogenized corundum with the particle size of greater than 3mm and not greater than 5mm, 10-20% of homogenized corundum with the particle size of greater than 1mm and not greater than 3mm, 10-15% of homogenized corundum with the particle size of greater than 0.088mm and not greater than 1mm, 5-10% of homogenized corundum with the particle size of not greater than 0.088mm, 10-20% of 97 silicon carbide, 2-5% of pure calcium aluminate cement, 0-10% of alumina micro-powder, 1-3% of silicon micro-powder, 2-3% of a composite carbon material and 2-3% of an antioxidant, and also comprises 0.1-0.3wt% of an additive. The homogenized corundum refractory castable can effectively prolong the service life of a tapping yard main channel castable, and reduces the cost of ton of iron.
Description
Technical field
The invention belongs to high-temperature refractory technical field, particularly a kind of homogenizing corundum refractory castable and preparation method thereof.Particularly relate to one and prepare main trough of blast furnace homogenizing corundum-silicon carbide-carbon matter mould material and preparation method thereof.The present invention adopts that structure is homogeneous, principal crystalline phase is that synthetic homogenizing corundum that corundum, purity and cost performance are high substitutes fused brown corundum or sintering plate corundum is aggregate, produces the homogenizing corundum-silicon carbide-carbon matter mould material of constant product quality.
Background technology
Current system for blast furnace ironmaking refractory materials mainly uses aluminum oxide, aluminium silicon carbide (carbon) fire resistant materials, mainly based on fused white corundum, fused brown corundum, sintering plate corundum that alumine, aluminum oxide powder are prepared through oversintering or melting for main raw material, aluminum oxide, that aluminium silicon carbide (carbon) fire resistant materials demand accounts for refractory materials total amount is larger.Along with raw materials cost goes up and ton iron cost falling pressure, Al
2o
3the fused white corundum of>=98% and sintering plate corundum, do not have competitive edge in the resistance to material of system for blast furnace ironmaking system, and Al
2o
3although the Brown Alundum alumina content of>=94% is relatively low, but because cost performance reason, its market requirement is comparatively large, is widely used in the key positions such as blast furnace iron outlet groove, blast furnace ceramic cup, hot metal mixer, and such as current most of iron runner castable adopts fused brown corundum to be aggregate.Brown Alundum raw material is by higher-grade bauxitic clay through electric smelting explained hereafter gained, and its technique is typical high energy consumption industry, and along with the increasing of Environmental, high energy consumption management, fused brown corundum raw material supply market is severe gradually.
Homogeneous material properity and quality stable, homogeneous compared with natural bauxite raw material.The domestic utilization about synthetic homogenization material at present launches, but mainly adopts Al
2o
3the homogenization material of content 70% ~ 90% substitutes traditional sintering bauxite clinker and is used in the lower occasion of the use temperature such as cement kiln and electric power, be aggregate as CN102850063A discloses a kind of with homogenization material, take pure calcium aluminate cement as bonding agent, main material is the dry-process cement rotary kiln kilneye mould material of aluminum-silicon carbide, but because blast furnace in metallurgical industry main iron hook resistant to corrosion and performance of flushing require high, use common homogenization material to be difficult to meet onsite application.
Synthetic homogenizing corundum produces gained to existing alumina natural matter by advanced homogenizing process and high-temperature calcination system, has homogeneous, the stay-in-grade feature of structure, belong to commercially available product.Compared with Brown Alundum, synthetic homogenizing corundum raw materials cost is cheap, Stability Analysis of Structures, and energy-conserving and environment-protective, wide market, the applied research about synthetic homogenizing corundum is less, does not more adopt synthetic homogenizing corundum to develop the relevant report of Refractory Castables for BF Troughs and Runners.
Summary of the invention
The object of the invention is to provide a kind of homogenizing corundum refractory castable and preparation method thereof, solves the problem of former use raw material height power consumption high cost.Improve refractory castable quality, reduce the consumption of on-the-spot ton iron.
A kind of homogenizing corundum refractory castable, the feed composition comprised is as follows: the homogenizing corundum 15wt% ~ 25wt% of 5mm < particle diameter≤8mm, the homogenizing corundum 10wt% ~ 20wt% of 3mm < particle diameter≤5mm, the homogenizing corundum 10wt% ~ 20wt% of 1mm < particle diameter≤3mm, the homogenizing corundum 10wt% ~ 15wt% of 0.088mm < particle diameter≤1mm, the homogenizing corundum 5wt% ~ 10wt% of≤0.088mm, 97 silicon carbide 10wt% ~ 20wt%, pure calcium aluminate cement 2wt% ~ 5wt%, alumina powder 0wt% ~ 10wt%, silicon powder 1wt% ~ 3wt%, composite carbon element material 2wt% ~ 3wt%, oxidation inhibitor 2wt% ~ 3wt%, separately add admixture 0.1wt% ~ 0.3wt%.
Homogenizing corundum is synthetic, and chemical composition requires Al
2o
3>=94wt%, Fe
2o
3≤ 0.5wt%; Volume density is at>=3.45gcm
-3, water-intake rate≤1%; Principal crystalline phase is corundum phase.
Composite carbon element material is one or more in crystalline flake graphite, amorphous graphite and pelletted pitch.
Oxidation inhibitor is metallic aluminium powder.
Admixture is one or more in explosion-proof fiber, metallic aluminium powder, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99.
A preparation method for homogenizing corundum refractory castable, concrete steps and parameter as follows:
1, by the homogenizing corundum 15wt% ~ 25wt% of 5mm < particle diameter≤8mm, the homogenizing corundum 10wt% ~ 20wt% of 3mm < particle diameter≤5mm, the homogenizing corundum 10wt% ~ 20wt% of 1mm < particle diameter≤3mm, the homogenizing corundum 10wt% ~ 15wt% of 0.088mm < particle diameter≤1mm, the homogenizing corundum 5wt% ~ 10wt% of≤0.088mm, mixes.
Its chemical composition requires Al
2o
3>=94wt%, Fe
2o
3≤ 0.5wt%; Volume density is at>=3.45gcm
-3, water-intake rate≤1%; Principal crystalline phase is corundum phase.
2,97 silicon carbide 10wt% ~ 20wt% are added successively, pure calcium aluminate cement 2wt% ~ 5wt%, alumina powder 0wt% ~ 10wt%, silicon powder 1wt% ~ 3wt%, composite carbon element material 2wt% ~ 3wt%, oxidation inhibitor 2wt% ~ 3wt%.
Wherein composite carbon element material is one or more in crystalline flake graphite, amorphous graphite and pelletted pitch, and oxidation inhibitor is metallic aluminium powder.
3, add the admixture of mentioned component 0.1wt% ~ 0.3wt% again, after mixing, pack.
The size controlling of 97 silicon carbide, pure calcium aluminate cement, alumina powder, silicon powder, oxidation inhibitor, admixture is at below 0.088mm;
The size controlling of composite carbon element material is between 0.088mm ~ 1mm.
The main trough of blast furnace homogenizing corundum-purposes of silicon carbide-carbon matter mould material on blast furnace discharge yard main iron hook, pour main trough of blast furnace homogenizing corundum-silicon carbide-carbon matter mould material into stirrer, the water adding 4wt% ~ 6wt% is uniformly mixed, the slurry stirred obtained, through casting, vibratory compaction, dries.
The invention has the advantages that: this material adopts pouring construction at the scene, anti-erosion, resistance to erosion, thermal shock performance are good.Blast furnace discharge yard main iron hook etc. can be widely used in wash away scouring, material and require the position of thermal shock performance.Try out through scene, the present invention adopts that structure is homogeneous, the synthetic homogenizing corundum raw material substitution high energy consumption Brown Alundum raw material of stable performance, effectively can extend the work-ing life of casting house castable in main trough, reduce a ton iron cost, have wide market outlook.
Embodiment
Note: to state admixture be additionally add outside all the other components.
Claims (8)
1. a homogenizing corundum refractory castable, it is characterized in that, the feed composition comprised is as follows: the homogenizing corundum 15wt% ~ 25wt% of 5mm < particle diameter≤8mm, the homogenizing corundum 10wt% ~ 20wt% of 3mm < particle diameter≤5mm, the homogenizing corundum 10wt% ~ 20wt% of 1mm < particle diameter≤3mm, the homogenizing corundum 10wt% ~ 15wt% of 0.088mm < particle diameter≤1mm, the homogenizing corundum 5wt% ~ 10wt% of≤0.088mm, 97 silicon carbide 10wt% ~ 20wt%, pure calcium aluminate cement 2wt% ~ 5wt%, alumina powder 0wt% ~ 10wt%, silicon powder 1wt% ~ 3wt%, composite carbon element material 2wt% ~ 3wt%, oxidation inhibitor 2wt% ~ 3wt%, separately add admixture 0.1wt% ~ 0.3wt%.
2. mould material according to claim 1, is characterized in that, described homogenizing corundum is synthetic, and chemical composition requires Al
2o
3>=94wt%, Fe
2o
3≤ 0.5wt%; Volume density is at>=3.45gcm
-3, water-intake rate≤1%; Principal crystalline phase is corundum phase.
3. mould material according to claim 1, is characterized in that, described composite carbon element material is one or more in crystalline flake graphite, amorphous graphite and pelletted pitch.
4. mould material according to claim 1, is characterized in that, described oxidation inhibitor is metallic aluminium powder.
5. mould material according to claim 1, is characterized in that, described admixture is one or more in explosion-proof fiber, metallic aluminium powder, tripoly phosphate sodium STPP and Sodium hexametaphosphate 99.
6. a preparation method for mould material described in claim 1, is characterized in that, concrete steps and parameter as follows:
1) by the homogenizing corundum 15wt% ~ 25wt% of 5mm < particle diameter≤8mm, the homogenizing corundum 10wt% ~ 20wt% of 3mm < particle diameter≤5mm, the homogenizing corundum 10wt% ~ 20wt% of 1mm < particle diameter≤3mm, the homogenizing corundum 10wt% ~ 15wt% of 0.088mm < particle diameter≤1mm, the homogenizing corundum 5wt% ~ 10wt% of≤0.088mm, mixes;
2) 97 silicon carbide 10wt% ~ 20wt% are added successively, pure calcium aluminate cement 2wt% ~ 5wt%, alumina powder 0wt% ~ 10wt%, silicon powder 1wt% ~ 3wt%, composite carbon element material 2wt% ~ 3wt%, oxidation inhibitor 2wt% ~ 3wt%;
3) add the admixture of mentioned component 0.1wt% ~ 0.3wt% again, after mixing, pack.
7. preparation method according to claim 6, it is characterized in that, step 2) described in 97 silicon carbide, pure calcium aluminate cement, alumina powder, silicon powder, oxidation inhibitor and step 3) described in the particle diameter of admixture all at below 0.088mm.
8. preparation method according to claim 6, is characterized in that, step 2) described in the particle diameter of composite carbon element material between 0.088mm ~ 1mm.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106045530A (en) * | 2016-05-31 | 2016-10-26 | 浙江汇力胶囊有限公司 | Refractory material for blast-furnace tapping iron runner adopting waste refractory materials |
| CN106220208A (en) * | 2016-08-30 | 2016-12-14 | 长兴云峰炉料有限公司 | A kind of long-life iron runner castable |
| CN107162605A (en) * | 2017-05-02 | 2017-09-15 | 长兴县煤山工业炉料有限公司 | A kind of preparation method of iron runner casting unshape refractory |
| CN108472722A (en) * | 2015-12-16 | 2018-08-31 | 凯得力法国公司 | Including zeolite type micro-structure pours refractory assemblies and application thereof |
| CN110282990A (en) * | 2019-08-06 | 2019-09-27 | 北京瑞尔非金属材料有限公司 | A kind of cheek inner liner of blast furnace hearth of blast furnace crucibe castable and composition |
| CN111003954A (en) * | 2019-12-30 | 2020-04-14 | 河南和成无机新材料股份有限公司 | High-purity calcium aluminate cement, preparation method and application thereof |
| CN111099883A (en) * | 2019-12-27 | 2020-05-05 | 江苏国窑科技有限公司 | Corundum brick for hazardous waste rotary kiln and preparation method thereof |
| CN111348926A (en) * | 2019-07-04 | 2020-06-30 | 营口石兴耐火材料科技有限公司 | Low-cost alumina-silicon carbide-carbonaceous castable and preparation method thereof |
| CN111484347A (en) * | 2020-06-01 | 2020-08-04 | 无锡市宝宜耐火材料有限公司 | High-strength Al2O3-SiC-C refractory castable and preparation method thereof |
| CN111646784A (en) * | 2020-06-01 | 2020-09-11 | 无锡市宝宜耐火材料有限公司 | Al (aluminum)2O3-SiC-C refractory castable and preparation method thereof |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108472722A (en) * | 2015-12-16 | 2018-08-31 | 凯得力法国公司 | Including zeolite type micro-structure pours refractory assemblies and application thereof |
| US11130711B2 (en) | 2015-12-16 | 2021-09-28 | Imertech Sas | Castable refractory compositions comprising zeolithic microstructures and uses thereof |
| CN106045530B (en) * | 2016-05-31 | 2021-01-12 | 浙江汇力胶囊有限公司 | Refractory material for blast furnace tapping channel by adopting waste refractory material |
| CN106045530A (en) * | 2016-05-31 | 2016-10-26 | 浙江汇力胶囊有限公司 | Refractory material for blast-furnace tapping iron runner adopting waste refractory materials |
| CN106220208A (en) * | 2016-08-30 | 2016-12-14 | 长兴云峰炉料有限公司 | A kind of long-life iron runner castable |
| CN107162605A (en) * | 2017-05-02 | 2017-09-15 | 长兴县煤山工业炉料有限公司 | A kind of preparation method of iron runner casting unshape refractory |
| CN111348926A (en) * | 2019-07-04 | 2020-06-30 | 营口石兴耐火材料科技有限公司 | Low-cost alumina-silicon carbide-carbonaceous castable and preparation method thereof |
| CN110282990A (en) * | 2019-08-06 | 2019-09-27 | 北京瑞尔非金属材料有限公司 | A kind of cheek inner liner of blast furnace hearth of blast furnace crucibe castable and composition |
| CN111099883A (en) * | 2019-12-27 | 2020-05-05 | 江苏国窑科技有限公司 | Corundum brick for hazardous waste rotary kiln and preparation method thereof |
| CN111003954A (en) * | 2019-12-30 | 2020-04-14 | 河南和成无机新材料股份有限公司 | High-purity calcium aluminate cement, preparation method and application thereof |
| CN111003954B (en) * | 2019-12-30 | 2021-11-16 | 河南和成无机新材料股份有限公司 | High-purity calcium aluminate cement, preparation method and application thereof |
| CN111646784A (en) * | 2020-06-01 | 2020-09-11 | 无锡市宝宜耐火材料有限公司 | Al (aluminum)2O3-SiC-C refractory castable and preparation method thereof |
| CN111484347A (en) * | 2020-06-01 | 2020-08-04 | 无锡市宝宜耐火材料有限公司 | High-strength Al2O3-SiC-C refractory castable and preparation method thereof |
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