CN103539465A - High-performance magnesia-carbon brick and production method thereof - Google Patents
High-performance magnesia-carbon brick and production method thereof Download PDFInfo
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- CN103539465A CN103539465A CN201310454088.XA CN201310454088A CN103539465A CN 103539465 A CN103539465 A CN 103539465A CN 201310454088 A CN201310454088 A CN 201310454088A CN 103539465 A CN103539465 A CN 103539465A
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Abstract
The invention discloses a magnesia-carbon brick for a steelmaking converter and a steel ladle and a production method of the magnesia-carbon brick. The magnesia-carbon brick is prepared from the raw materials in percentage by weight: 72-83 percent of sintered magnesia, 3-15 percent of graphite grain, 1-15 percent of antioxidant and 2-5 percent of binder. The preparation method comprises the steps: (1) carrying out mechanical crushing on massive magnesia, then sending the crushed massive magnesia into a ball mill, and carrying out fine grinding on the crushed massive magnesia to prepare the magnesia in five specifications; and (2) carrying out burdening according to the required weight percentage, sending the burdened materials into a mixer to carry out mulling, adding coarse-grained magnesia, a thermosetting phenol-formaldehyde resin binder, the graphite grains and a mixed powder of fine-grained magnesia and the antioxidant into the mixer sequentially, carrying out material mixing for more than 25 minutes, and carrying out processing forming finally. According to the magnesia-carbon brick and the production method disclosed by the invention, as the graphite grains are adopted to replace crystalline flake graphite, the material yield is increased, and the spalling resistance and the structure spalling resistance of the materials are improved.
Description
Technical field
The present invention relates to technical field of refractory materials, particularly magnesia carbon brick and preparation method thereof for a kind of steelmaking system.
Background technology
So far, magnesia carbon brick (MgO-C) is the main inner lining material of steel-making converter, 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, antistripping variation thereupon; On the other hand, the carbon that magnesia carbon brick adopts is mainly crystalline flake graphite, and because its unique laminated structure can be when brick be body formed, parallel pressure forming direction produces elastic effect, the stress concentration that causes brick laying structure to occur slabbing and heat transfer anisotropy and cause, accelerates brick laying structure and destroys.
Summary of the invention
The present invention has overcome above-mentioned the deficiencies in the prior art, and the magnesia carbon brick that a kind of anti-oxidant, slag corrosion resistance and Spalling resistance can be strong is provided, thereby has effectively improved converter and ladle work-ing life, is conducive to smelter cost efficiency.
Technical scheme of the present invention is achieved in that
A magnesia carbon brick, formulated by following raw materials by weight: magnesite clinker 72 ~ 83%, granular graphite 3 ~ 15%, antioxidant 1 ~ 5%, bonding agent 2 ~ 5%.
As preferably, described magnesite clinker size composition is: the magnesite clinker 7～14% of 6 ~ 3mm, the magnesite clinker 7～15% of 3 ~ 1mm, the magnesite clinker 8～14% of 1 ~ 0.5mm, the magnesite clinker 6～24% of the magnesite clinker 13～31% of 0.5 ~ 0.088mm, <0.088mm, wherein, in magnesia, MgO weight percent is more than or equal to 96%.
As preferably, 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.
As preferably, described granular graphite processes like this: be first broken into the particle of 1～0.045mm, then these particles form through aluminium colloidal sol 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 to Mechanical Crushing through jaw crusher, oppositely rolling roller crusher, cone crusher, send into again ball mill and carry out fine grinding, after screen cloth screening, making granularity is the magnesia of 6 ~ 3mm, 3 ~ 1mm, 1 ~ 0.5mm, 0.5 ~ 0.088mm, five kinds of specifications of <0.088mm; (2), weight percent is on request prepared burden, through the material preparing, send in mixer and mix, its order of addition(of ingredients) is for first adding the magnesite clinker of 6 ~ 3mm, 3 ~ 1mm, 1 ~ 0.5mm, then add heat-reactive phenolic resin bonding agent, add granular graphite again, finally add the magnesite clinker of 0.5 ~ 0.088mm, <0.088mm and the powder mix of antioxidant, the total time of batch mixing is no less than 25 minutes; (3), the material mixing is added in mould, carry out extrusion forming; (4), the blank of moulding is sent in drying room, toasted; (5), after work in-process kiln discharge, test and pack.
Adopted the invention has the beneficial effects as follows of technique scheme:
A kind of steel-making converter the present invention relates to, ladle magnesia brick, by adopting granular graphite to substitute crystalline flake graphite, the problem that the stress concentration causing because of heat transfer anisotropy when slabbing, use appear in brick laying structure while efficiently solving moulding causes brick laying structure to destroy, yield rate and the heat resistanceheat resistant that has improved material peeled off, structure spalling performance; Simultaneously, containing the magnesia carbon brick of graphite after sol impregnation, because of colloidal sol infiltration and carbon coated particle, can greatly improve the antioxidant property of carbon, the colloidal sol simultaneously adopting is high-melting-point, high erosion-resistant ceramic phase in oven dry afterwards, can further improve the anti-scour property of material.
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, can be applicable to steel-making converter, ladle, particularly in oxidizable, easy scouring such as ladle slag lines and to peel off position effect very obvious.
Embodiment
The specific embodiment of the present invention is as follows:
Embodiment: the component of different material is carried out to the Different Weight per-cent proportioning as following table:
Its performance gives to embody as following table:
scouring index:
Magnesia carbon brick is made to 40 * 40 * 160 bar-shaped sample, adopt revolution anti-slag method by sample in 1650 ℃ of rotary kilns and be incubated 2 hours.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 is preheated to 1100 ± 10 ℃ and be incubated after 15min, rapidly sample is moved in burner hearth, after insulation 20min, rapidly sample is immersed in 5～35 ℃ of flowing waters, sharply after cooling 3min, take out immediately, in air, be no less than 5min storage period.Then sample is put into stove again, repeat said process, until large crackle appears in sample, till can not continuing experiment, 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, under air atmosphere, be heated to 1400 ℃ and be 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 adopt laser heat conducting instrument to measure 2 direction thermal conductivitys of magnesia carbon brick sample, perpendicular to forming direction (K
⊥) and be parallel to forming direction (K
∥); Anisotropic heat conductivity=K
⊥/ K
∥.
Claims (7)
1. a high-performance magnesia carbon brick, is characterized in that by following raw materials by weight formulated: magnesite clinker 72 ~ 83%, granular graphite 3 ~ 15%, antioxidant 1 ~ 5%, bonding agent 2 ~ 5%.
2. a kind of high-performance magnesia carbon brick according to claim 1, it is characterized in that: described magnesite clinker size composition is: the magnesite clinker 7～14% of 6 ~ 3mm, the magnesite clinker 7～15% of 3 ~ 1mm, the magnesite clinker 8～14% of 1 ~ 0.5mm, the magnesite clinker 6～24% of the magnesite clinker 13～31% of 0.5 ~ 0.088mm, <0.088mm, wherein, in magnesia, MgO weight percent is more than or equal to 96%.
3. a kind of high-performance magnesia carbon brick according to claim 1, is characterized in that: 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.
4. a kind of high-performance magnesia carbon brick according to claim 3, is characterized in that: described granular graphite processes like this: be first broken into the particle of 1～0.045mm, then these graphite granules form through aluminium colloidal sol or zirconium sol impregnation post-drying.
5. 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, and its granularity is 0.075～0.045mm.
6. a kind of high-performance magnesia carbon brick according to claim 1, is characterized in that: described bonding agent is heat-reactive phenolic resin.
7. the preparation method of a high-performance magnesia carbon brick, it is characterized in that comprising the following steps: (1), block magnesite clinker is carried out to Mechanical Crushing through jaw crusher, oppositely rolling roller crusher, cone crusher, send into again ball mill and carry out fine grinding, after screen cloth screening, making granularity is the magnesia of 6 ~ 3mm, 3 ~ 1mm, 1 ~ 0.5mm, 0.5 ~ 0.088mm, five kinds of specifications of <0.088mm; (2), weight percent is on request prepared burden, through the material preparing, send in mixer and mix, its order of addition(of ingredients) is for first adding the magnesite clinker of 6 ~ 3mm, 3 ~ 1mm, 1 ~ 0.5mm, then add heat-reactive phenolic resin bonding agent, add granular graphite again, finally add the magnesite clinker of 0.5 ~ 0.088mm, <0.088mm and the powder mix of antioxidant, the total time of batch mixing is no less than 25 minutes; (3), the material mixing is added in mould, carry out extrusion forming; (4), the blank of moulding is sent in drying room, toasted; (5), after work in-process kiln discharge, test and pack.
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| CN103539465B CN103539465B (en) | 2016-01-06 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104311082A (en) * | 2014-10-21 | 2015-01-28 | 安徽省萧县华龙耐火材料有限责任公司 | Magnesia-carbon ladle slag line brick and production method thereof |
| CN104496492A (en) * | 2014-10-10 | 2015-04-08 | 长兴正发热电耐火材料有限公司 | Composite magnesium-carbon fireproof crucible and preparation method thereof |
| CN104529491A (en) * | 2014-12-26 | 2015-04-22 | 江苏苏嘉集团新材料有限公司 | Method for preparing composite magnesia carbon bricks of different carbon content |
| CN105646003A (en) * | 2015-12-30 | 2016-06-08 | 苏州大学 | Slag-corrosion-resisting refractory material and in-situ forming method of slag-corrosion-resisting coating on surface of slag-corrosion-resisting refractory material |
| CN106631053A (en) * | 2016-09-29 | 2017-05-10 | 武汉科技大学 | Refractory material for steel tapping hole of converter and preparation method for refractory material |
| 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
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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 |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104496492A (en) * | 2014-10-10 | 2015-04-08 | 长兴正发热电耐火材料有限公司 | Composite magnesium-carbon fireproof crucible and preparation method thereof |
| 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 |
| CN104311082A (en) * | 2014-10-21 | 2015-01-28 | 安徽省萧县华龙耐火材料有限责任公司 | Magnesia-carbon ladle slag line brick and production method thereof |
| CN104529491A (en) * | 2014-12-26 | 2015-04-22 | 江苏苏嘉集团新材料有限公司 | Method for preparing composite magnesia carbon bricks of different carbon content |
| 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 |
| CN105646003A (en) * | 2015-12-30 | 2016-06-08 | 苏州大学 | Slag-corrosion-resisting refractory material and in-situ forming method of slag-corrosion-resisting coating on surface of slag-corrosion-resisting refractory material |
| CN106631053A (en) * | 2016-09-29 | 2017-05-10 | 武汉科技大学 | Refractory material for steel tapping hole of converter and preparation method for refractory material |
| 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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| CN103539465B (en) | 2016-01-06 |
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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 |