CN103539465B - A kind of high-performance magnesia carbon brick and preparation method thereof - Google Patents
A kind of high-performance magnesia carbon brick and preparation method thereof Download PDFInfo
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- CN103539465B CN103539465B CN201310454088.XA CN201310454088A CN103539465B CN 103539465 B CN103539465 B CN 103539465B CN 201310454088 A CN201310454088 A CN 201310454088A CN 103539465 B CN103539465 B CN 103539465B
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Abstract
The invention discloses a kind of steel-making converter, ladle magnesia carbon brick and preparation method thereof, magnesia carbon brick is formulated by following raw materials by weight: magnesite clinker 72 ~ 83%, granular graphite 3 ~ 15%, antioxidant 1 ~ 5%, bonding agent 2 ~ 5%; Preparation method comprises the following steps: (1), by block magnesia through carrying out Mechanical Crushing, then sends into ball mill and carries out the magnesia that five kinds of specifications are made in fine grinding; (2), weight percent is on request prepared burden, material through preparing is sent in mixer and is mixed, first add coarse grain magnesia, then heat-reactive phenolic resin bonding agent is added, add granular graphite again, finally add the powder mix of Fine magnesia and antioxidant, batch mixing be no less than 25 minutes total time; Last machine-shaping; The present invention substitutes crystalline flake graphite by adopting granular graphite, and the yield rate and the heat resistanceheat resistant that improve material are peeled off, structure spalling performance.
Description
Technical field
The present invention relates to technical field of refractory materials, particularly a kind of steelmaking system magnesia carbon brick and preparation method thereof.
Background technology
So far, magnesia carbon brick (MgO-C) be steel-making converter, the main inner lining material of ladle.From the Investigation on damage with rear converter, ladle, the damage of magnesia carbon brick mainly: on the one hand, the oxidation-resistance of carbon is poor, oxidizable, brings brick body slag corrosion resistance, resistance to flaking to be deteriorated thereupon; On the other hand, the carbon that magnesia carbon brick adopts mainly crystalline flake graphite, because the laminated structure of its uniqueness can when brick be body formed, parallel pressure forming direction produces elastic effect, brick laying structure is caused to occur accelerating slabbing and heat transfer anisotropy and the stress concentration that causes brick laying structure and destroy.
Summary of the invention
Instant invention overcomes above-mentioned the deficiencies in the prior art, provide the magnesia carbon brick that a kind of anti-oxidant, slag corrosion resistance and Spalling resistance can be strong, thus effectively improve converter and ladle work-ing life, be conducive to smelter cost efficiency.
Technical scheme of the present invention is achieved in that
A kind of high-performance magnesia carbon brick is formulated by following raw materials by weight: magnesite clinker 72 ~ 83%, granular graphite 3 ~ 15%, antioxidant 1 ~ 5%, bonding agent 2 ~ 5%, and each component ratio sum is 100%; In described granular graphite, the weight percent of C is more than or equal to 98%, and described granular graphite is synthetic graphite, barren rock electrode ink or useless graphite carbon sleeve roller; Described granular graphite processes like this: the particle being first broken into 1 ~ 0.045mm, and then these graphite granules form through Alumina gel or zirconium sol impregnation post-drying.
As preferably, described antioxidant is aluminium powder, silica flour or carborundum powder, and its granularity is 0.075 ~ 0.045mm.
As preferably, described bonding agent is heat-reactive phenolic resin.
A kind of preparation method of high-performance magnesia carbon brick, comprise the following steps: (1), block magnesite clinker is carried out Mechanical Crushing through jaw crusher, oppositely rolling roller crusher, cone crusher, send into ball mill again and carry out fine grinding, after sieved through sieve, make the magnesia that granularity is 6 ~ 3mm, 3 ~ 1mm, 1 ~ 0.5mm, 0.5 ~ 0.088mm, <0.088mm five kinds of specifications; (2), weight percent is on request prepared burden, material through preparing is sent in mixer and is mixed, its order of addition(of ingredients) is the magnesite clinker first adding 6 ~ 3mm, 3 ~ 1mm, 1 ~ 0.5mm, then heat-reactive phenolic resin bonding agent is added, add granular graphite again, finally add 0.5 ~ 0.088mm, the magnesite clinker of <0.088mm and the powder mix of antioxidant, batch mixing be no less than 25 minutes total time; (3), the material mixed is added in mould, carry out extrusion forming; (4), shaping blank is sent in drying room, toasts; (5), test after work in-process kiln discharge and pack.
Have employed the invention has the beneficial effects as follows of technique scheme:
A kind of steel-making converter that the present invention relates to, ladle magnesia brick, crystalline flake graphite is substituted by adopting granular graphite, the problem that the stress concentration caused because heat transfer anisotropy when slabbing, use appear in brick laying structure when efficiently solving shaping causes brick laying structure to destroy, the yield rate and the heat resistanceheat resistant that improve material are peeled off, structure spalling performance; Simultaneously, containing the magnesia carbon brick of graphite after sol impregnation, because of gel permeation and carbon coated particle, the antioxidant property of carbon greatly can be improved, the colloidal sol simultaneously adopted is high-melting-point, high erosion-resistant ceramic phase after the drying, can improve the anti-scour property of material further.
The present invention is through scientific and reasonable batching and thermal treatment process, anti-oxidant, the slag corrosion resistance of magnesia carbon brick of preparation and heat resistanceheat resistant is peeled off, structure spalling excellent property, high life, steel-making converter, ladle can be applicable to, particularly in oxidizable, easy scouring such as ladle slag lines and peel off position effect clearly.
Embodiment
The specific embodiment of the present invention is as follows:
Embodiment: the component of different material is carried out the Different Weight per-cent proportioning as following table:
Its performance such as following table gives to embody:
Scouring index:
Magnesia carbon brick is made the bar-shaped sample of 40 × 40 × 160, to adopt rotary slag-resistance method that sample is incubated 2 hours in 1650 DEG C of rotary kilns.Lateral dissection sample section, the scouring index of test samples.Each formula needs 3 samples, and averages.
Heat-shock resistance:
High Temperature Furnaces Heating Apparatus preheated to 1100 ± 10 DEG C and after being incubated 15min, rapidly sample moved in burner hearth, after insulation 20min, rapidly sample being immersed in 5 ~ 35 DEG C of flowing waters, take out immediately after quick refrigeration 3min, be no less than 5min storage period in atmosphere.Then sample is put into stove again, repeat said process, until large crackle appears in sample, till experiment can not be continued, record experiment number.Each formula needs 3 samples, and averages.
Oxidated layer thickness:
Magnesia carbon brick sample is put into High Temperature Furnaces Heating Apparatus, is heated to 1400 DEG C under air atmosphere and is incubated 3 hours, after naturally cooling, lateral dissection sample section, the oxidated layer thickness of test samples.Each formula needs 3 samples, and averages.
Anisotropic heat conductivity:
First laser heat conducting instrument is adopted to measure 2 direction thermal conductivitys of magnesia carbon brick sample, namely perpendicular to forming direction (K
⊥) and be parallel to forming direction (K
∥); Anisotropic heat conductivity=K
⊥/ K
∥.
Claims (3)
1. a high-performance magnesia carbon brick, is characterized in that by following raw materials by weight formulated: sintering magnesium
Sand 72 ~ 83%, granular graphite 3 ~ 15%, antioxidant 1 ~ 5%, bonding agent 2 ~ 5%, each component
Ratio sum is 100%; In described granular graphite, the weight percent of C is more than or equal to 98%,
And described granular graphite is synthetic graphite, barren rock electrode ink or useless graphite carbon sleeve roller; Described particle
Shape graphite processes like this: the particle being first broken into 1 ~ 0.045mm, then these graphite
Particle forms through Alumina gel or zirconium sol impregnation post-drying.
2. a kind of high-performance magnesia carbon brick according to claim 1, is characterized in that: described antioxidant is
Aluminium powder, silica flour or carborundum powder, its granularity is 0.075 ~ 0.045mm.
3. a kind of high-performance magnesia carbon brick according to claim 1, is characterized in that: described bonding agent is heat
Solidity resol.
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| CN201310454088.XA CN103539465B (en) | 2013-09-29 | 2013-09-29 | A kind of high-performance magnesia carbon brick and preparation method thereof |
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| CN201310454088.XA CN103539465B (en) | 2013-09-29 | 2013-09-29 | A kind of high-performance magnesia carbon brick and preparation method thereof |
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| CN103539465A CN103539465A (en) | 2014-01-29 |
| CN103539465B true CN103539465B (en) | 2016-01-06 |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104496492B (en) * | 2014-10-10 | 2016-08-24 | 长兴正发热电耐火材料有限公司 | A kind of compound magnesium carbon fire-clay crucible and preparation method thereof |
| CN104311082B (en) * | 2014-10-21 | 2016-05-04 | 安徽省萧县华龙耐火材料有限责任公司 | A kind of magnesium carbon ladle slag line brick and production method thereof |
| CN104529491B (en) * | 2014-12-26 | 2016-07-06 | 江苏苏嘉集团新材料有限公司 | The preparation method of the magnesia carbon brick of different carbon content compounds |
| CN105646003B (en) * | 2015-12-30 | 2018-06-19 | 苏州大学 | Anti-slag invades refractory material and its surface in situ forms the method that anti-slag invades coating |
| CN106631053B (en) * | 2016-09-29 | 2019-12-10 | 武汉科技大学 | Refractory material for converter steel tapping hole and preparation method thereof |
| CN108640694A (en) * | 2018-06-14 | 2018-10-12 | 营口石元耐火材料有限公司 | A kind of enhancing magnesia carbon brick and preparation method thereof introducing complex phase additive |
| CN108863313A (en) * | 2018-08-20 | 2018-11-23 | 安徽牛山新型材料科技有限公司 | A kind of low-carbon MgO-C refractory material and preparation method thereof |
| CN109796213A (en) * | 2019-03-25 | 2019-05-24 | 常州盛钢耐火材料有限公司 | A kind of magnesia carbon brick production method |
| CN111348902A (en) * | 2019-07-04 | 2020-06-30 | 营口石兴耐火材料科技有限公司 | Method for improving oxidation resistance of low-carbon magnesia carbon material |
| CN111517760A (en) * | 2020-04-03 | 2020-08-11 | 海城市军刚中档镁砂有限公司 | Periclase wear-resistant furnace lining for large magnesia light-burned shaft kiln |
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|---|---|---|---|---|
| CN101343188A (en) * | 2008-08-21 | 2009-01-14 | 武汉科技大学 | Low-carbon magnesium carbon brick and preparation thereof |
| CN102276275A (en) * | 2011-07-21 | 2011-12-14 | 辽宁科技大学 | Method for producing magnesium carbon bricks by using microwave heating technology |
| CN102584277A (en) * | 2012-01-12 | 2012-07-18 | 武汉科技大学 | Low-carbon magnesia carbon bricks and preparation method thereof |
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2013
- 2013-09-29 CN CN201310454088.XA patent/CN103539465B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101343188A (en) * | 2008-08-21 | 2009-01-14 | 武汉科技大学 | Low-carbon magnesium carbon brick and preparation thereof |
| CN102276275A (en) * | 2011-07-21 | 2011-12-14 | 辽宁科技大学 | Method for producing magnesium carbon bricks by using microwave heating technology |
| CN102584277A (en) * | 2012-01-12 | 2012-07-18 | 武汉科技大学 | Low-carbon magnesia carbon bricks and preparation method thereof |
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Effective date of registration: 20160705 Address after: 313220 No. 117 Longshan Road, Zhong tube Town, Huzhou, Zhejiang, Deqing County Patentee after: Zhejiang Jin Lei refractory material Co., Ltd. Address before: 313220 Zhejiang Jin Lei Industrial Zone, Deqing County, China Industrial Zone, Zhejiang, China,, Limited by Share Ltd Patentee before: Zhejiang Jinlei Refractories Co., Ltd. |
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Denomination of invention: High performance magnesia carbon brick and preparation method thereof Effective date of registration: 20210824 Granted publication date: 20160106 Pledgee: Zhejiang Deqing Rural Commercial Bank Co.,Ltd. Zhongguan sub branch Pledgor: Zhejiang Jin Lei refractory material Co.,Ltd. Registration number: Y2021330001228 |
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Date of cancellation: 20220510 Granted publication date: 20160106 Pledgee: Zhejiang Deqing Rural Commercial Bank Co.,Ltd. Zhongguan sub branch Pledgor: Zhejiang Jin Lei refractory material Co.,Ltd. Registration number: Y2021330001228 |
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