CN104761268B - Homogenized corundum refractory castable and preparation method thereof - Google Patents
Homogenized corundum refractory castable and preparation method thereof Download PDFInfo
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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, more particularly to a kind of homogenizing corundum refractory castable and its preparation
Method.More particularly to one kind prepares main trough of blast furnace homogenizing corundum-silicon carbide-carbon matter castable and preparation method thereof.This
It is bright adopt that structure is homogeneous, principal crystalline phase substitutes fused brown corundum for the high synthetic homogenizing corundum of corundum, purity and cost performance or
Person's sintering plate corundum is aggregate, produces the stable homogenizing corundum of product quality-silicon carbide-carbon matter castable.
Background technology
At present system for blast furnace ironmaking refractory material mainly uses aluminium oxide, aluminium silicon carbide (carbon) fire resistant materials, mainly
With fused white corundum, fused brown corundum, sintered plate that alumine, alumina powder are prepared as primary raw material through sintering or melting
Based on shape corundum, aluminium oxide, that aluminium silicon carbide (carbon) fire resistant materials demand accounts for refractory material total amount is larger.With cost of material
Go up and ton ferrum cost falling pressure, Al2O3>=98% fused white corundum and sintering plate corundum, in system for blast furnace ironmaking system
Unite in resistance to material without competitive advantage, and Al2O3Although >=94% Brown Alundum alumina content is relatively low, sexual valence is because
Than reason, its market demand is larger, is widely used in the key positions, such as mesh such as blast furnace iron outlet groove, blast furnace ceramic cup, mixed iron blast
Front most of iron runner castable adopts fused brown corundum for aggregate.Brown Alundum raw material is given birth to by high-grade bauxite Jing electric smelting technique
Gained is produced, its technique is typical high energy consumption industry, with Environmental, the increasing of high energy consumption management, electric smelting palm fibre is just
Beautiful raw material supply market is gradually severe.
Homogeneous material properity and quality are stable compared with natural bauxite raw material, homogeneous.At present the country is with regard to synthetic homogenizing
The utilization of material has launched, but mainly adopts Al2O3The homogenization material of content 70%～90% substitutes traditional sintering bauxite clinker
Cement kiln and electric power etc. are used in using the relatively low occasion of temperature, such as CN102850063A discloses one kind with homogenization material as bone
Material, with pure calcium aluminate cement as bonding agent, main material is the dry-process cement rotary kiln kilneye castable of aluminum-silicon carbide, but by
Have high demands in blast furnace in metallurgical industry sow resistant to corrosion and performance of flushing, be difficult to meet onsite application using common homogenization material.
Synthetic homogenizing corundum is by advanced homogenizing process and high-temperature calcination system to existing Alumina natural material
Production gained, with structure is homogeneous, steady quality the characteristics of, belong to commercially available product.Compared with Brown Alundum, synthetic homogenizing
Corundum cost of material is cheap, Stability Analysis of Structures, and energy-conserving and environment-protective, wide market, answering with regard to synthetic homogenizing corundum
It is less with studying, the relevant report of pouring refractories for tapping spout of blast furnace is not more developed using synthetic homogenizing corundum.
The content of the invention
Present invention aim at providing a kind of homogenizing corundum refractory castable and preparation method thereof, solve original and use raw material
The problem of high power consumption high cost.Castable refractory quality is improve, live ton ferrum consumption is reduced.
A kind of homogenizing corundum refractory castable, including raw material components it is as follows：The homogenizing corundum of 5mm ＜ particle diameters≤8mm
The homogenizing corundum 10wt%～20wt% of 15wt%～25wt%, 3mm ＜ particle diameters≤5mm, the homogenizing of 1mm ＜ particle diameters≤3mm is firm
The homogenizing corundum 10wt%～15wt% of beautiful 10wt%～20wt%, 0.088mm ＜ particle diameters≤1mm, the homogenizing of≤0.088mm is firm
Beautiful 5wt%～10wt%, 97 carborundum 10wt%～20wt%, pure calcium aluminate cement 2wt%～5wt%, alumina powder
0wt%～10wt%, silicon powder 1wt%～3wt%, composite carbon element material 2wt%～3wt%, antioxidant 2wt%～
3wt%；It is another to add additive 0.1wt%～0.3wt%.
Homogenizing corundum is synthetic, and chemical composition requires Al2O3>=94wt%, Fe2O3≤ 0.5wt%；Bulk density
In >=3.45gcm-3, water absorption 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.
Antioxidant is metallic aluminium powder.
Additive is one or more in explosion-proof fiber, metallic aluminium powder, sodium tripolyphosphate and sodium hexameta phosphate.
A kind of preparation method of homogenizing corundum refractory castable, concrete steps and parameter it is as follows：
1st, by the homogenizing corundum 15wt%～25wt% of 5mm ＜ particle diameters≤8mm, the homogenizing corundum of 3mm ＜ particle diameters≤5mm
The homogenizing corundum 10wt%～20wt% of 10wt%～20wt%, 1mm ＜ particle diameters≤3mm, 0.088mm ＜ particle diameters≤1mm's is equal
Change corundum 10wt%～15wt%, the homogenizing corundum 5wt%～10wt% of≤0.088mm, mix homogeneously.
Its chemical composition requires Al2O3>=94wt%, Fe2O3≤ 0.5wt%；Bulk density is in >=3.45gcm-3, water suction
Rate≤1%；Principal crystalline phase is corundum phase.
2nd, 97 carborundum 10wt%～20wt%, pure calcium aluminate cement 2wt%～5wt%, alumina powder are sequentially added
0wt%～10wt%, silicon powder 1wt%～3wt%, composite carbon element material 2wt%～3wt%, antioxidant 2wt%～
3wt%.
Wherein composite carbon element material is one or more in crystalline flake graphite, amorphous graphite and pelletted pitch, and oxygen
Agent is metallic aluminium powder.
3rd, the additive of mentioned component 0.1wt%～0.3wt% is added, after mix homogeneously, pack.
97 carborundums, pure calcium aluminate cement, alumina powder, silicon powder, antioxidant, the size controlling of additive exist
Below 0.088mm；
The size controlling of composite carbon element material is between 0.088mm～1mm.
Main trough of blast furnace homogenizing corundum-purposes of the silicon carbide-carbon matter castable on blast furnace discharge yard sow, by height
Stove sow homogenizing corundum-silicon carbide-carbon matter castable pours blender into, adds the water stirring mixing of 4wt%～6wt% equal
The slurry for stirring that is even, obtaining, Jing moulding by casting, vibration moulding, drying.
It is an advantage of the current invention that：The material adopts at the scene pouring construction, and anti-erosion, resistance to erosion, thermal shock performance are good.Can
It is widely used in the position that blast furnace discharge yard sow etc. washes away and require thermal shock performance to scouring, material.Jing scenes are on probation,
The present invention, can be effective using structure is homogeneous, stable performance synthetic homogenizing corundum raw material substitution high energy consumption Brown Alundum raw material
Extend the service life of cast house castable in main trough, a ton ferrum cost is reduced, with wide market prospect.
Specific embodiment
Note：Stated additive is additionally added outside remaining component.
Claims (2)
1. a kind of homogenizing corundum refractory castable, it is characterised in that the raw material components for including are as follows：5mm ＜ particle diameters≤8mm's is equal
Change corundum 15wt%～25wt%, the homogenizing corundum 10wt%～20wt% of 3mm ＜ particle diameters≤5mm, 1mm ＜ particle diameters≤3mm's
The homogenizing corundum 10wt%～15wt% of homogenizing corundum 10wt%～20wt%, 0.088mm ＜ particle diameter≤1mm ,≤0.088mm's
Homogenizing corundum 5wt%～10wt%, 97 carborundum 10wt%～20wt%, pure calcium aluminate cement 2wt%～5wt%, aluminium oxide
Micropowder 0wt%～10wt%, silicon powder 1wt%～3wt%, composite carbon element material 2wt%～3wt%, antioxidant 2wt%～
3wt%；Another to add additive 0.1wt%～0.3wt%, described homogenizing corundum is synthetic, and chemical composition is required
Al2O3>=94wt%, Fe2O3≤ 0.5wt%；Bulk density is in >=3.45gcm-3, water absorption rate≤1%；Principal crystalline phase is corundum
Phase, described composite carbon element material is one or more in crystalline flake graphite, amorphous graphite and pelletted pitch, described oxygen
Agent is metallic aluminium powder, and described additive is the one kind in explosion-proof fiber, metallic aluminium powder, sodium tripolyphosphate and sodium hexameta phosphate
Or it is various.
2. the preparation method of castable described in a kind of claim 1, it is characterised in that concrete steps and parameter are as follows：
1) by the homogenizing corundum 15wt%～25wt% of 5mm ＜ particle diameters≤8mm, the homogenizing corundum 10wt% of 3mm ＜ particle diameters≤5mm
The homogenizing corundum 10wt%～20wt% of～20wt%, 1mm ＜ particle diameters≤3mm, the homogenizing corundum of 0.088mm ＜ particle diameters≤1mm
The homogenizing corundum 5wt%～10wt% of 10wt%～15wt% ,≤0.088mm, mix homogeneously；
2) 97 carborundum 10wt%～20wt%, pure calcium aluminate cement 2wt%～5wt%, alumina powder 0wt% are sequentially added
～10wt%, silicon powder 1wt%～3wt%, composite carbon element material 2wt%～3wt%, antioxidant 2wt%～3wt%；Institute
97 carborundums, pure calcium aluminate cement, alumina powder, silicon powder, antioxidant and the step 3 stated) described in additive
Particle diameter is all in below 0.088mm；The particle diameter of described composite carbon element material is between 0.088mm～1mm；
3) additive of mentioned component 0.1wt%～0.3wt% is added, after mix homogeneously, pack；
Described composite carbon element material is one or more in crystalline flake graphite, amorphous graphite and pelletted pitch, and described is anti-
Oxidant is metallic aluminium powder, and described additive is in explosion-proof fiber, metallic aluminium powder, sodium tripolyphosphate and sodium hexameta phosphate
Plant or various.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| 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 |
| 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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| CN1030095A (en) * | 1988-05-09 | 1989-01-04 | 冶金工业部建筑研究总院 | Refractory Castables for BF Troughs and Runners |
| CN102093061A (en) * | 2009-12-10 | 2011-06-15 | 中冶建筑研究总院有限公司 | Tapping channel casting material with good oxidation resistance |
| CN101898897A (en) * | 2010-08-22 | 2010-12-01 | 卿如民 | Quick-drying self-flow iron runner castable material and application method thereof |
| CN102603274A (en) * | 2012-04-06 | 2012-07-25 | 武汉科技大学 | Cramp iron castable and preparation method thereof |
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Address after: 100085, Beijing, Haidian District Qinghe Anning East Road No. 1 hospital Patentee after: Beijing Jinyu Tongda refractory Technology Co.,Ltd. Address before: 100035, Qinghe Road, Qinghe, Beijing, Haidian District, No. 1 Patentee before: TONGDA REFRACTORY TECHNOLOGIES Co.,Ltd. |