CN103482992A - Fireproof material for steel ladle bottom and preparation method thereof - Google Patents
Fireproof material for steel ladle bottom and preparation method thereof Download PDFInfo
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- CN103482992A CN103482992A CN201310413342.1A CN201310413342A CN103482992A CN 103482992 A CN103482992 A CN 103482992A CN 201310413342 A CN201310413342 A CN 201310413342A CN 103482992 A CN103482992 A CN 103482992A
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- steel ladle
- castable
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Abstract
The invention discloses a fireproof material for a steel ladle bottom. The fireproof material is made of a framework and castable. The framework is made of large clinkers of which granularity ranges from 50mm to 400m, and the castable is made of aluminum-magnesium auto-flowing castable in which rho-aluminum oxide is used as a binding agent. According to the fireproof material, the large clinkers which are well sintered and are compact in structure are used as the ladle bottom refractory framework, and therefore molten steel washing resistance of the framework is effectively enhanced; the aluminum-magnesium auto-flowing castable in which rho-aluminum oxide is used as the binding agent belongs to non-cement castable, and the castable has the advantages that an integrative system is pure and liquid phase amount generated under high temperature is small; the aluminum-magnesium auto-flowing castable generates spinels in situ under the high temperature condition, the in-situ generated spinels are used as a binder phase, and then the castable has the advantages of being good in thermal shock stability performance and not prone to peeling in the using process, the castable and the framework are encapsulated and poured into a whole, and therefore the fireproof material has the advantages of being high in molten steel washing resistance, good in peeling resistance, long in service life and the like. The fireproof material can have the good using effect in various steel ladle bottoms.
Description
Technical field
The present invention relates to a kind of unshape refractory, refractory materials and preparation method thereof for especially a kind of bottom of steel ladle.
Background technology
The bottom of steel ladle refractory materials in use, not only bear the thermal shock damage that molten steel souring and temperature variation cause, and infiltration and oversintering occur under huge pressure at molten steel, thereby cause structure spalling, make the damage of bag end refractory materials far faster than bag wall and slag lining, this becomes the restriction ladle key factor in work-ing life, also to safety in production, brings hidden danger simultaneously.Therefore, improve the quality of bottom of steel ladle refractory materials and improve building method, becoming the emphasis of technical staff author's research.Existing bottom of steel ladle refractory materials is generally formed or is formed by laying fireproof bricks by the mould material cast.Publication number is that CN1680059A discloses " a kind of large-scale bottom of steel ladle refractory materials ", it is less than high grade bauxite 70～85wt% of 15mm with granularity, magnesia powder 3～15wt%, magnesium-aluminium spinel micro mist 3～10wt%, silicon powder 0.5～5wt%, magnesia wedding agent 1～5%, additional dispersion agent 0.1～0.2%, improve result of use by the refractoriness under load and the appropriate technical measures such as hot rate of expansion of control that reduce material; But the reduction of refractoriness under load also just means that material at high temperature intensity reduces, thereby cause the reduction of Anti-scouring high-temperature ability; Publication number is that CN1546258A discloses a kind of " micro expansion gravity flow pouring material for ladle bottoms ", it is with 0～15% spinel, 0～10% magnesia, 0～8% pure calcium aluminate cement, 0.5～5% silicon powder, 6～10% Alpha-alumina micro mist is matrix, alumine is aggregate, the content of magnesia, spinel and silicon powder in filling a prescription by adjustment, line velocity of variation and the sintering situation of regulating material, improve the use properties of material; But this mould material phase complicated component, CaO-Al2O3-MgO-SiO2 system in use eutectic is more, cause material in use corrosion resistance and erosion resistibility poor.
Summary of the invention
The technical problem to be solved in the present invention is to provide the bottom of steel ladle refractory materials that a kind of anti-molten steel scouring capability is strong, corrosion resistance is good; The invention also discloses the preparation method of bottom of steel ladle with refractory materials.
For solving the problems of the technologies described above, the technical solution used in the present invention is: it is made by skeleton and mould material, it is the bulk grog that 50mm～400mm distributes that described skeleton adopts granularity, and described mould material adopts take the magnalium gravity flow pouring material that ρ-aluminum oxide is wedding agent.
The critical granularity of magnalium gravity flow pouring material of the present invention is 8mm.
Magnalium gravity flow pouring material of the present invention is formed by following component configuration: alumina and/or corundum 60～88wt%, magnesia 1～16wt%, Alpha-alumina micro mist 5～14%, ρ-aluminum oxide 2～10wt% and silicon powder 0～2wt%.
The proportioning of bulk grog granularity of the present invention is: 400mm～250mm 10～30wt%, 250mm～100mm 20～60wt%, 100mm～50mm 30～50wt%.
Bulk grog of the present invention is one or more in Al2O3MgOC Bricks after bauxite clinker, corundum piece material, the rear high alumina brick of labour and labour.
Preparation method of the present invention adopts above-mentioned raw materials and proportioning thereof, the steps include: the bulk grog is evenly arranged in to bottom of steel ladle, forms skeleton; After each raw material of mould material is added to regulation water, mix; Mould material after mixing is poured in the skeleton gap, automatic levelling, the maintenance drying, can obtain the bottom of steel ladle refractory materials after baking.
Adopt the beneficial effect that technique scheme produces to be: the present invention selects that sintering is good, the bulk grog of compact structure is made skeleton, thereby effectively strengthened the anti-molten steel scouring capability of skeleton; The magnalium gravity flow pouring material that the ρ-aluminum oxide of take is wedding agent belongs to cement-free castable, has a coupling system pure, produces the few characteristics of amount of liquid phase under high temperature; The magnalium gravity flow pouring material forms original position and generates spinel under high-temperature situation, the original position of take like this generates spinel as in conjunction with phase, having thermal shock resistance can be better, be not prone to the characteristics such as peel off in use procedure, and and the aggregate embedding that the bulk grog is made is cast for one, therefore have that anti-molten steel scouring capability is strong, the antistripping ability is good, the advantages such as long service life, the result of use that all can obtain at various Ladle Bottoms.
The present invention further limits the critical granularity of magnalium gravity flow pouring material, and the granularity that makes mould material matches with the skeleton gap that the bulk grog forms, and makes it to reach better for effect, thereby effectively increases anti-molten steel scouring capability and the antistripping ability of product.
The present invention further limits the grain size proportion of bulk grog, and the size-grade distribution that makes to wrap the anti-material in the end more rationally, the conjugation of bulk grog and mould material is better, has further increased anti-molten steel scouring capability and the antistripping ability of product.
Embodiment
Below in conjunction with specific embodiment, the present invention is further detailed explanation.
Embodiment 1: this bottom of steel ladle adopts following raw material and method to be prepared from refractory materials.
(1) 120 tons of bottom of steel ladles are cleaned out, installed the slide plate brick cup, ventilating seat brick; The high grade bauxite grog of 400mm～250mm:20wt%, 250mm～100mm:40wt%, 100mm～50mm:40wt% size-grade distribution is evenly arranged in to the bag end, forms skeleton;
(2) be less than 8mm by critical granularity, brown corundum 78wt%, 97 electrosmelted magnesite clinker fine powder 6wt%, Alpha-alumina micro mist 11wt%, ρ-aluminum oxide 4wt%, silicon powder 1wt% preparation; The regulation water that adds the heavy 4.2wt% of above-mentioned material; Stir, be configured to the magnalium gravity flow pouring material;
(3) the magnalium gravity flow pouring material is poured in the skeleton gap, automatic levelling, the maintenance drying, can be made into this bottom of steel ladle refractory materials after baking.
It is smooth that refractory materials prepared by the present embodiment in use wraps the end, deteriorates even, without visible peeling phenomenon, wraps the about 1mm/ stove of end erosion rate, reaches and wrap the effect of the synchronous repairing of wall.
Embodiment 2: this bottom of steel ladle adopts following raw material and method to be prepared from refractory materials.
(1) 50 tons of bottom of steel ladles are cleaned out, installed the slide plate brick cup, ventilating seat brick; The one-level bauxite clinker of 400mm～250mm:10wt%, 250mm～100mm:60wt%, 100mm～50mm:30wt% size-grade distribution is evenly arranged in to the bag end, forms skeleton;
(2) be less than 8mm by critical granularity, high grade bauxite 70wt%, 97 highly-purity magnesite fine powder 13wt%, Alpha-alumina micro mist 7wt%, ρ-aluminum oxide 8wt%, silicon powder 2wt% preparation, add the water of the heavy 4.8wt% of above-mentioned material, stir, be configured to the magnalium gravity flow pouring material;
(3) the magnalium gravity flow pouring material is poured in the skeleton gap, automatic levelling, the maintenance drying, can be made into this bottom of steel ladle refractory materials after baking.
It is smooth that refractory materials prepared by the present embodiment in use wraps the end, deteriorates even, without visible peeling phenomenon, wraps the about 0.85mm/ stove of end erosion rate, reaches and wrap the effect of the synchronous repairing of wall.
Embodiment 3: this bottom of steel ladle adopts following raw material and method to be prepared from refractory materials.
(1) 75 tons of bottom of steel ladles are cleaned out, installed the slide plate brick cup, ventilating seat brick; Al2O3MgOC Bricks after the labour of 400mm～250mm:30wt%, 250mm～100mm:20wt%, 100mm～50mm:50wt% size-grade distribution is evenly arranged in to the bag end, forms skeleton;
(2) be less than 8mm by critical granularity, alumina 80wt%, highly-purity magnesite fine powder 9wt%, Alpha-alumina micro mist 5wt%, ρ-aluminum oxide 5wt%, silicon powder 1wt% preparation, add above-mentioned material to weigh the water of 5wt%, stirs, and is configured to the magnalium gravity flow pouring material;
(3) the magnalium gravity flow pouring material is poured in the skeleton gap, automatic levelling, the maintenance drying, can be made into this bottom of steel ladle refractory materials after baking.
It is smooth that refractory materials prepared by the present embodiment in use wraps the end, deteriorates even, without visible peeling phenomenon, wraps the about 0.87mm/ stove of end erosion rate, reaches and wrap the effect of the synchronous repairing of wall.
Embodiment 4: this bottom of steel ladle adopts following raw material and method to be prepared from refractory materials.
(1) 150 tons of bottom of steel ladles are cleaned out, installed the slide plate brick cup, ventilating seat brick; The corundum bulk material of 400mm～250mm:20wt%, 250mm～100mm:50wt%, 100mm～50mm:30wt% size-grade distribution is evenly arranged in to the bag end, forms skeleton;
(2) be less than 8mm corundum 40wt%, alumina 48wt%, highly-purity magnesite fine powder 1wt%, Alpha-alumina micro mist 7wt%, ρ-aluminum oxide 2wt%, silicon powder 2wt% preparation by critical granularity, the water that adds the heavy 4.2wt% of above-mentioned material, stir, be configured to the magnalium gravity flow pouring material;
(3) the magnalium gravity flow pouring material is poured in the skeleton gap, automatic levelling, the maintenance drying, can be made into this bottom of steel ladle refractory materials after baking.
It is smooth that refractory materials prepared by the present embodiment in use wraps the end, deteriorates even, without visible peeling phenomenon, wraps the about 1.02mm/ stove of end erosion rate, reaches and wrap the effect of the synchronous repairing of wall.
Embodiment 5: this bottom of steel ladle adopts following raw material and method to be prepared from refractory materials.
(1) 25 tons of bottom of steel ladles are cleaned out, installed the slide plate brick cup, ventilating seat brick; High alumina brick after the labour of 50mm～400mm size-grade distribution is evenly arranged in to the bag end, forms skeleton;
(2) be less than 8mm by critical granularity, alumina 60wt%, 97 highly-purity magnesite fine powder 16wt%, Alpha-alumina micro mist 14wt%, ρ-aluminum oxide 10wt% preparation, add above-mentioned material to weigh the water of 5wt%, stirs, and is configured to the magnalium gravity flow pouring material;
(3) the magnalium gravity flow pouring material is poured in the skeleton gap, automatic levelling, the maintenance drying, can be made into this bottom of steel ladle refractory materials after baking.
It is smooth that refractory materials prepared by the present embodiment in use wraps the end, deteriorates even, without visible peeling phenomenon, wraps the about 0.82mm/ stove of end erosion rate, reaches and wrap the effect of the synchronous repairing of wall.
Claims (6)
1. a bottom of steel ladle refractory materials, it is made by skeleton and mould material, it is characterized in that: it is the bulk grog that 50mm～400mm distributes that described skeleton adopts granularity, described mould material adopts take the magnalium gravity flow pouring material that ρ-aluminum oxide is wedding agent.
2. bottom of steel ladle refractory materials according to claim 1, it is characterized in that: the critical granularity of described magnalium gravity flow pouring material is 8mm.
3. bottom of steel ladle refractory materials according to claim 1 and 2, it is characterized in that, described magnalium gravity flow pouring material is formed by following component configuration: alumina and/or corundum 60～88wt%, magnesia 1～16wt%, Alpha-alumina micro mist 5～14%, ρ-aluminum oxide 2～10wt% and silicon powder 0～2wt%.
4. bottom of steel ladle refractory materials according to claim 1, is characterized in that, the proportioning of described bulk grog granularity is: 400mm～250mm 10～30wt%, 250mm～100mm 20～60wt%, 100mm～50mm 30～50wt%.
5. according to the described bottom of steel ladle refractory materials of claim 1 or 4, it is characterized in that: described bulk grog is one or more in Al2O3MgOC Bricks after bauxite clinker, corundum piece material, the rear high alumina brick of labour and labour.
6. the preparation method of refractory materials for the described bottom of steel ladle of claim 1, is characterized in that: the bulk grog is evenly arranged in to bottom of steel ladle, forms skeleton; Mould material is mixed to the additional regulation water yield by proportioning; Mould material after mixing is poured in the skeleton gap, automatic levelling, the maintenance drying, can obtain the bottom of steel ladle refractory materials after baking.
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| CN201310413342.1A CN103482992A (en) | 2013-09-12 | 2013-09-12 | Fireproof material for steel ladle bottom and preparation method thereof |
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| CN201310413342.1A CN103482992A (en) | 2013-09-12 | 2013-09-12 | Fireproof material for steel ladle bottom and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105439586A (en) * | 2015-12-02 | 2016-03-30 | 武汉如星科技有限公司 | Castable for large steel ladle |
| CN107739213A (en) * | 2017-08-24 | 2018-02-27 | 洛阳利尔耐火材料有限公司 | A kind of ladle material for repairing and preparation method thereof |
| CN114262232A (en) * | 2021-12-18 | 2022-04-01 | 河南竹林庆州耐火材料有限公司 | Preparation method of carbon-free castable added with graphite raw material for refining ladle working lining |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102718513A (en) * | 2012-06-28 | 2012-10-10 | 洛阳利尔耐火材料有限公司 | Aluminum-magnesium refractory castable material and preparation method thereof |
| CN103157783A (en) * | 2011-12-19 | 2013-06-19 | 攀钢集团攀枝花钢钒有限公司 | Masonry method of steel ladle bottom |
-
2013
- 2013-09-12 CN CN201310413342.1A patent/CN103482992A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103157783A (en) * | 2011-12-19 | 2013-06-19 | 攀钢集团攀枝花钢钒有限公司 | Masonry method of steel ladle bottom |
| CN102718513A (en) * | 2012-06-28 | 2012-10-10 | 洛阳利尔耐火材料有限公司 | Aluminum-magnesium refractory castable material and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105439586A (en) * | 2015-12-02 | 2016-03-30 | 武汉如星科技有限公司 | Castable for large steel ladle |
| CN107739213A (en) * | 2017-08-24 | 2018-02-27 | 洛阳利尔耐火材料有限公司 | A kind of ladle material for repairing and preparation method thereof |
| CN107739213B (en) * | 2017-08-24 | 2021-06-08 | 洛阳利尔功能材料有限公司 | Repairing material for steel ladle and preparation method thereof |
| CN114262232A (en) * | 2021-12-18 | 2022-04-01 | 河南竹林庆州耐火材料有限公司 | Preparation method of carbon-free castable added with graphite raw material for refining ladle working lining |
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Application publication date: 20140101 |