CN103787676A - Slag line magnesia-carbon brick for steel ladle - Google Patents
Slag line magnesia-carbon brick for steel ladle Download PDFInfo
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- CN103787676A CN103787676A CN201210435914.1A CN201210435914A CN103787676A CN 103787676 A CN103787676 A CN 103787676A CN 201210435914 A CN201210435914 A CN 201210435914A CN 103787676 A CN103787676 A CN 103787676A
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Abstract
The invention discloses a slag line magnesia-carbon brick for a steel ladle. The magnesia-carbon brick is prepared from the following raw materials in parts by weight: 28-32 parts of low silicon fused magnesia with the granularity of 5-20 meshes, 22-26 parts of low silicon fused magnesia with the granularity of 20-50 meshes, 8-12 parts of low silicon fused magnesia with the granularity of 50-200 meshes, 1-3 parts of low silicon fused magnesia with the granularity of 200 meshes, 0.8-1.2 parts of graphite powder with the granularity of 20 meshes, 1-2 parts of zinc powder with the granularity of 100 meshes, 1-2 parts of aluminite powder with the granularity of 100 meshes, 0.5-1 part of boron nitride with the granularity of 200 meshes, 0.5-1 part of boron carbide with the granularity of 200 meshes, 1-2 parts of cerium oxide with the granularity of 200 meshes, 0.5-1.5 parts of asphalt powder and 3.5-4.5 parts of phenolic resin.
Description
Technical field
The present invention relates to technical field of ferrous metallurgy, relate in particular to a kind of ladle slag line magnesia carbon brick.
Background technology
Enter 21 century, iron and steel enterprise's structural adjustment, fine quality steel becomes the leading product of large-lot producer, as: superior alloy steel, ultra low-carbon steel, Clean Steel, the ratio of the steel grades such as high-strength steel increases year by year, fine quality steel requires strictly to control the carbon content in refractory materials in smelting process, to reduce the carburetting to molten steel, and liquid steel temperature raising and fall are little in secondary refining, the thermal conductivity of ladle lining is low, thereby cause the working conditions of ladle harsher, Working environment is more severe, in the urgent need to pollution-free to molten steel, the appearance of low carbon magnesia carbon brick for the high-quality ladle slag line of high durability.
Ladle slag line is generally 10～18wt% with the total carbon content of common magnesia carbon brick at present, and the one of the main reasons of magnesia carbon brick damage is the oxidation due to carbon in brick, thereby slag easily permeates, make to corrode aggravation, but the research of current ongoing low carbon magnesia carbon brick aspect mainly concentrates on the research of bonding agent and carbon raw, if: application number is that 200610046434.0 Chinese patents disclosed " magnesia carbon brick and the production method thereof of Containing antioxidants C-TiN composite granule " are respectively using C-TiN composite granule as oxidation inhibitor with graphite, electrosmelted magnesite clinker, bonding agent is through mixing, moulding, after thermal treatment, make, improve slag resistance, extend work-ing life, but because titanium material cost is higher, be difficult to promote the use of, and the carbon content of this magnesia carbon brick is high, will be to molten steel recarburization, application number is that 200710019767.9 Chinese patents disclosed " a kind of non-oxide composite low-carbon magnesia-carbon brick " have been introduced and in magnesia carbon brick, introduced non-oxidized substance (nitride or boride) and prepare carbon containing lower than 6% low carbon magnesia carbon brick, it has kept the performance of high-carbon magnesia carbon brick, what add due to it is the non-oxidized substance that pre-synthesis is good, cost is high, and hydration reaction may occur, and performance improves not obvious, application number is that 99107800.4 Chinese patents disclosed " antioxidant of carbon containing refractory " have been introduced a kind of antioxidant, at least one in its zinc powder by 0.15～10% (weight) or zinc powder and aluminium, magnesium, silicon, silicon calcium powder, silicon carbide, norbide, magnesium aluminum-alloy powder, silicon nitride powder forms, wherein zinc powder >=0.15%, granularity is less than 0.5mm, add metal powder to be only used for preventing the oxidation of carbon in carbon containing refractory, the mechanical behavior under high temperature of refractory materials is not affected.
Summary of the invention
The object of the invention is to propose a kind of ladle slag line magnesia carbon brick, this magnesia carbon brick can reduce ladle slag line magnesia carbon brick in use to molten steel recarburization, solves the magnesia carbon brick goods spalling resistance causing after carbon content reduces simultaneously and reduces.
For reaching this object, the present invention by the following technical solutions:
A kind of ladle slag line magnesia carbon brick, described magnesia carbon brick is made up of following raw materials according by weight: the low silicon electrosmelted magnesite clinker of 5-20 order 28-32 part, the low silicon electrosmelted magnesite clinker of 20-50 order 22-26 part, the low silicon electrosmelted magnesite clinker of 50-200 order 8-12 part, the low silicon electrosmelted magnesite clinker of-200 order 1-3 part,-20 order Graphite Powder 99 0.8-1.2 parts,-100 order zinc powder 1-2 parts,-100 order aluminium powder 1-2 parts,-200 order boron nitride 0.5-1 parts ,-200 order norbide 0.5-1 parts ,-200 order cerium oxide 1-2 parts, asphalt powder 0.5-1.5 part, resol 3.5-4.5 part.
Preferably, described magnesia carbon brick is made up of following raw materials according by weight: the low silicon electrosmelted magnesite clinker of 5-20 order 29-31 part, the low silicon electrosmelted magnesite clinker of 20-50 order 23-25 part, the low silicon electrosmelted magnesite clinker of 50-200 order 9-11 part, the low silicon electrosmelted magnesite clinker of-200 order 1.5-2.5 part,-20 order Graphite Powder 99 0.9-1.1 parts,-100 order zinc powder 1.2-1.7 parts,-100 order aluminium powder 1.2-1.7 parts,-200 order boron nitride 0.6-0.9 parts ,-200 order norbide 0.6-0.9 parts ,-200 order cerium oxide 1.2-1.7 parts, asphalt powder 0.8-1.2 part, resol 3.8-4.2 part.
Most preferably, described magnesia carbon brick is made up of following raw materials according by weight: 30 parts of the low silicon electrosmelted magnesite clinkers of 5-20 order, 24 parts of the low silicon electrosmelted magnesite clinkers of 20-50 order, 10 parts of the low silicon electrosmelted magnesite clinkers of 50-200 order, 2 parts of the low silicon electrosmelted magnesite clinkers of-200 order ,-20 1 part of order Graphite Powder 99 ,-100 1.5 parts of order zinc powders,-100 1.5 parts of order aluminium powders,-200 0.8 part of order boron nitride ,-200 0.8 part of order norbide ,-200 1.5 parts of order cerium oxide, 1 part of asphalt powder, 4 parts, resol.
In order to reduce molten steel recarburization, under the prerequisite that guarantees magnesia carbon brick antistripping and resistance to fouling, must further reduce the carbon content of the slag line magnesia carbon brick supporting with carbon-free molten bath brick.But it is that magnesia carbon brick anti-thermal shock stability is reduced that reduction magnesia carbon brick carbon content the most significantly affects magnesia carbon brick character, and spalling resistance and resistance to fouling reduce.
The present invention is by adding the combination of zinc powder and aluminium powder, not only play oxidation resistant effect, and be mainly reaction in－situ to occur in applied at elevated temperature process generate non-oxidized substance, then fill to intert and in periclasite skeleton structure, play enhancing toughening effect, thereby significantly improve hot strength and the heat-shock resistance of magnesia carbon brick, improve its oxidation-resistance and slag resistance
Norbide and boron nitride can effectively prevent the oxidation of graphite and non-oxidized substance, make magnesia carbon brick be difficult for being soaked by slag and permeating.
Cerium oxide guarantee matrix part realize best sintering, in conjunction with effect.Greatly improve the work-ing life of working lining, reduce carbon melting loss and be mingled with, reduce ladle carburetting.
Beneficial effect of the present invention is:
1) ladle of the present invention slag line magnesia carbon brick, carbon content≤3%, to molten steel recarburization≤3ppm, has reduced the pollution to molten steel.
2, the metal powder Main Function in component of the present invention is reaction in－situ to occur in magnesia carbon brick applied at elevated temperature process generate non-oxidized substance, then fill to intert and in periclasite skeleton structure, play enhancing toughening effect, thereby the hot strength and the heat-shock resistance that significantly improve magnesia carbon brick, improve its oxidation-resistance and slag resistance.
3, ladle slag line metallic composite low carbon magnesium carbon brick of the present invention, volume density>=3.05g/cm
3, apparent porosity≤5%, cold crushing strength>=53MPa, 1400 ℃ are buried carbon high-temp folding strength>=30Mpa, carbon content≤3%, MgO content>=85%.
4, ladle slag line metallic composite low carbon magnesium carbon brick of the present invention, it is 78～83% (now conventional magnesia carbon brick residual strength conservation rate is 50～60%) that 1100 ℃ of heat-shock resistance employings, air-cooled air quenching method are once measured residual strength conservation rate.
5, ladle slag line metallic composite low carbon magnesium carbon brick of the present invention, oxidation-resistance, slag resistance, hot strength, heat-shock resistance improve obviously, and ladle slag line refractory brick life extends, and ton steel refractory consumption rate cost declines.
Embodiment
Embodiment mono-
A kind of ladle slag line magnesia carbon brick, described magnesia carbon brick is made up of following raw materials according by weight: 28 parts of the low silicon electrosmelted magnesite clinkers of 5-20 order, 26 parts of the low silicon electrosmelted magnesite clinkers of 20-50 order, 8 parts of the low silicon electrosmelted magnesite clinkers of 50-200 order, 3 parts of the low silicon electrosmelted magnesite clinkers of-200 order ,-20 0.8 part of order Graphite Powder 99 ,-100 2 parts of order zinc powders,-100 1 part of order aluminium powder,-200 1 part of order boron nitride ,-200 0.5 part of order norbide ,-200 2 parts of order cerium oxide, 0.5 part of asphalt powder, 4.5 parts, resol.
Embodiment bis-
A kind of ladle slag line magnesia carbon brick, described magnesia carbon brick is made up of following raw materials according by weight: 32 parts of the low silicon electrosmelted magnesite clinkers of 5-20 order, 22 parts of the low silicon electrosmelted magnesite clinkers of 20-50 order, 12 parts of the low silicon electrosmelted magnesite clinkers of 50-200 order, 1 part of the low silicon electrosmelted magnesite clinker of-200 order ,-20 1.2 parts of order Graphite Powder 99s ,-100 1 part of order zinc powder,-100 2 parts of order aluminium powders,-200 0.5 part of order boron nitride ,-200 1 part of order norbide ,-200 1 part of order cerium oxide, 1.5 parts of asphalt powders, 3.5 parts, resol.
Embodiment tri-
A kind of ladle slag line magnesia carbon brick, described magnesia carbon brick is made up of following raw materials according by weight: 29 parts of the low silicon electrosmelted magnesite clinkers of 5-20 order, 25 parts of the low silicon electrosmelted magnesite clinkers of 20-50 order, 9 parts of the low silicon electrosmelted magnesite clinkers of 50-200 order, 2.5 parts of the low silicon electrosmelted magnesite clinkers of-200 order ,-20 0.9 part of order Graphite Powder 99 ,-100 1.7 parts of order zinc powders,-100 1.2 parts of order aluminium powders,-200 0.9 part of order boron nitride ,-200 0.6 part of order norbide ,-200 1.7 parts of order cerium oxide, 0.8 part of asphalt powder, 4.2 parts, resol.
Embodiment tetra-
A kind of ladle slag line magnesia carbon brick, described magnesia carbon brick is made up of following raw materials according by weight: 31 parts of the low silicon electrosmelted magnesite clinkers of 5-20 order, 23 parts of the low silicon electrosmelted magnesite clinkers of 20-50 order, 11 parts of the low silicon electrosmelted magnesite clinkers of 50-200 order, 1.5 parts of the low silicon electrosmelted magnesite clinkers of-200 order ,-20 1.1 parts of order Graphite Powder 99s ,-100 1.2 parts of order zinc powders,-100 1.7 parts of order aluminium powders,-200 0.6 part of order boron nitride ,-200 0.9 part of order norbide ,-200 1.2 parts of order cerium oxide, 1.2 parts of asphalt powders, 3.8 parts, resol.
Embodiment five
A kind of ladle slag line magnesia carbon brick, described magnesia carbon brick is made up of following raw materials according by weight: 30 parts of the low silicon electrosmelted magnesite clinkers of 5-20 order, 24 parts of the low silicon electrosmelted magnesite clinkers of 20-50 order, 10 parts of the low silicon electrosmelted magnesite clinkers of 50-200 order, 2 parts of the low silicon electrosmelted magnesite clinkers of-200 order ,-20 1.0 parts of order Graphite Powder 99s ,-100 1.5 parts of order zinc powders,-100 1.5 parts of order aluminium powders,-200 0.8 part of order boron nitride ,-200 0.8 part of order norbide ,-200 1.5 parts of order cerium oxide, 1 part of asphalt powder, 4 parts, resol.
Claims (3)
1. a ladle slag line magnesia carbon brick, it is characterized in that, described magnesia carbon brick is made up of following raw materials according by weight: the low silicon electrosmelted magnesite clinker of 5-20 order 28-32 part, the low silicon electrosmelted magnesite clinker of 20-50 order 22-26 part, the low silicon electrosmelted magnesite clinker of 50-200 order 8-12 part, the low silicon electrosmelted magnesite clinker of-200 order 1-3 part,-20 order Graphite Powder 99 0.8-1.2 parts,-100 order zinc powder 1-2 parts ,-100 order aluminium powder 1-2 parts ,-200 order boron nitride 0.5-1 parts,-200 order norbide 0.5-1 parts,-200 order cerium oxide 1-2 parts, asphalt powder 0.5-1.5 part, resol 3.5-4.5 part.
2. a kind of ladle slag line magnesia carbon brick as claimed in claim 1, it is characterized in that, described magnesia carbon brick is made up of following raw materials according by weight: the low silicon electrosmelted magnesite clinker of 5-20 order 29-31 part, the low silicon electrosmelted magnesite clinker of 20-50 order 23-25 part, the low silicon electrosmelted magnesite clinker of 50-200 order 9-11 part, the low silicon electrosmelted magnesite clinker of-200 order 1.5-2.5 part,-20 order Graphite Powder 99 0.9-1.1 parts,-100 order zinc powder 1.2-1.7 parts,-100 order aluminium powder 1.2-1.7 parts,-200 order boron nitride 0.6-0.9 parts,-200 order norbide 0.6-0.9 parts,-200 order cerium oxide 1.2-1.7 parts, asphalt powder 0.8-1.2 part, resol 3.8-4.2 part.
3. a kind of ladle slag line magnesia carbon brick as claimed in claim 2, it is characterized in that, described magnesia carbon brick is made up of following raw materials according by weight: 30 parts of the low silicon electrosmelted magnesite clinkers of 5-20 order, 24 parts of the low silicon electrosmelted magnesite clinkers of 20-50 order, 10 parts of the low silicon electrosmelted magnesite clinkers of 50-200 order, 2 parts of the low silicon electrosmelted magnesite clinkers of-200 order,-20 1 part of order Graphite Powder 99,-100 1.5 parts of order zinc powders ,-100 1.5 parts of order aluminium powders ,-200 0.8 part of order boron nitride,-200 0.8 part of order norbide,-200 1.5 parts of order cerium oxide, 1 part of asphalt powder, 4 parts, resol.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210435914.1A CN103787676A (en) | 2012-11-03 | 2012-11-03 | Slag line magnesia-carbon brick for steel ladle |
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| CN201210435914.1A CN103787676A (en) | 2012-11-03 | 2012-11-03 | Slag line magnesia-carbon brick for steel ladle |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109020571A (en) * | 2018-08-27 | 2018-12-18 | 海城利尔麦格西塔材料有限公司 | A kind of anti-erosion magnesia carbon brick and preparation method thereof |
| CN110698179A (en) * | 2019-10-15 | 2020-01-17 | 上海利尔耐火材料有限公司 | High-performance magnesia carbon brick and preparation method thereof |
| CN111704437A (en) * | 2020-07-09 | 2020-09-25 | 郑州市科源耐火材料有限公司 | Magnesia-carbon brick for smelting in Consteel electric furnace |
| CN114671668A (en) * | 2022-03-11 | 2022-06-28 | 钢铁研究总院有限公司 | Steel ladle refractory material for smelting rare earth steel and manufacturing method thereof |
-
2012
- 2012-11-03 CN CN201210435914.1A patent/CN103787676A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109020571A (en) * | 2018-08-27 | 2018-12-18 | 海城利尔麦格西塔材料有限公司 | A kind of anti-erosion magnesia carbon brick and preparation method thereof |
| CN110698179A (en) * | 2019-10-15 | 2020-01-17 | 上海利尔耐火材料有限公司 | High-performance magnesia carbon brick and preparation method thereof |
| CN111704437A (en) * | 2020-07-09 | 2020-09-25 | 郑州市科源耐火材料有限公司 | Magnesia-carbon brick for smelting in Consteel electric furnace |
| CN114671668A (en) * | 2022-03-11 | 2022-06-28 | 钢铁研究总院有限公司 | Steel ladle refractory material for smelting rare earth steel and manufacturing method thereof |
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Application publication date: 20140514 |