CN110255970A - A kind of sintering free low carbon magnesia carbon brick and preparation method thereof - Google Patents
A kind of sintering free low carbon magnesia carbon brick and preparation method thereof Download PDFInfo
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- CN110255970A CN110255970A CN201910579975.7A CN201910579975A CN110255970A CN 110255970 A CN110255970 A CN 110255970A CN 201910579975 A CN201910579975 A CN 201910579975A CN 110255970 A CN110255970 A CN 110255970A
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- Prior art keywords
- free low
- powder
- fused magnesite
- low carbon
- magnesia
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
- C04B26/02—Macromolecular compounds
- C04B26/10—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- C04B26/12—Condensation polymers of aldehydes or ketones
- C04B26/122—Phenol-formaldehyde condensation polymers
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/76—Use at unusual temperatures, e.g. sub-zero
- C04B2111/763—High temperatures
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The present invention relates to a kind of sintering free low carbon magnesia carbon bricks and preparation method thereof.Its technical solution is: using the crystalline flake graphite of the fused magnesite particle of 65~78wt%, the fused magnesite fine powder of 18~28wt% and 2~8wt% as raw material, the Cr of the additional 1~4wt% of raw material7C3The phenolic resin of powder and 2~6wt%.Under agitation, by the material content, the Cr7C3The magnesia particle is first uniformly mixed by powder content and the phenolic resin content by the size grading, sequentially adds half, the crystalline flake graphite, the fused magnesite fine powder, the Cr of the phenolic resin7C3Powder and the remaining phenolic resin, obtain mixture.By mixture compression moulding under the conditions of 120~200MPa, dry 12h, is made sintering free low carbon magnesia carbon brick under the conditions of 200 DEG C.Environmentally protective and simple process of the invention；Prepared sintering free low carbon magnesia carbon brick intensity is big, without cracking, consistency is high and oxidation resistant.
Description
Technical field
The invention belongs to low carbon magnesia carbon brick technical fields.More particularly to a kind of sintering free low carbon magnesia carbon brick and preparation method thereof.
Background technique
Magnesia carbon brick has good high temperature resistance, anti-slag ability and thermal shock resistance as a kind of composite refractory
Can, it is widely used in steel industry.Since traditional magnesia carbon brick is there are thermal conductivity height, causes thermal losses to increase, make material
Erosion degree increase, in the use of VOD furnace will lead to molten steel recarburization, graphite resource is largely consumed, therefore magnesia carbon brick is ground
Study carefully and is intended to low-carbon development.However as the reduction of carbon content in magnesia-carbon refractory material, protect carbon therein not oxidized aobvious
It obtains particularly important.Metal and non-metallic additive is added usually in magnesia carbon brick to prevent the oxidation of coal in magnesia carbon brick in people, has
A little scholar (Xu Hui adds the aerial oxidation foreign countries refractory material of MgO-C refractory material of aluminium and silicon, 2011,6 (26):
Continuous conversion zone 21-27) is formed on surface by the Al and Si of gasification as antioxidant using metal Al powder and Si powder,
Improve the oxidation resistance of magnesia carbon brick.Also some scholar (Yan Zhengguo, Chen Wei, Yu Jingkun .B4The synthesis of C-C composite granule and
It applies process engineering journal, 2009,9 (5): 1011-1016. in low carbon magnesia carbon brick) by introducing B4C powder, B4C oxygen
At B after change2O3, one layer of liquid phase is formed on the surface of sample, plugging material stomata reduces oxygen in the mass transfer speed of specimen surface
Degree, reduces the degree of oxidation of carbon in brick.
But there are still deficiencies for these antioxidants, as the life that reacts with magnesia in magnesia carbon brick is added after Al powder aoxidizes
At magnesium aluminate spinel, expansion is brought, magnesia carbon brick can be made to generate cracking；The mechanical properties decrease that can make magnesia carbon brick is added in Si powder；When
When temperature reaches 1400 DEG C or more, B is added4C aoxidizes the liquid phase film to be formed and destroys, and antioxygenic property reduces.
Summary of the invention
The present invention is directed to overcome prior art defect, and it is an object of the present invention to provide a kind of environmentally protective and simple process unburned low
The preparation method of carbon magnesia carbon brick, the sintering free low carbon magnesia carbon brick intensity prepared with this method are big, high and anti-oxidant without cracking, consistency
Property is excellent.
To achieve the above object, the technical solution adopted by the present invention is that:
With the fused magnesite particle of 65~78wt%, the scale stone of the fused magnesite fine powder of 18~28wt% and 2~8wt%
Ink is raw material, the Cr of the additional 1~4wt% of raw material7C3The phenolic resin of powder and 2~6wt%；Under agitation, by institute
State material content, the Cr7C3The magnesia particle is first pressed the size grading by powder content and the phenolic resin content
It is uniformly mixed, sequentially adds half, the crystalline flake graphite, the fused magnesite fine powder, the Cr of the phenolic resin7C3
Powder and the remaining phenolic resin, obtain mixture；By mixture compression moulding under the conditions of 120~200MPa,
Dry 12h, is made sintering free low carbon magnesia carbon brick under the conditions of 200 DEG C.
The size grading of the fused magnesite particle is: partial size < 5mm and >=3mm account for fused magnesite particle 34~
40wt%, partial size < 3mm and >=1mm account for fused magnesite 32~38wt% of particle, partial size < 1mm and >=0.088mm accounts for electric-melting magnesium
24~30wt% of sand particle.
Content of MgO >=95wt% of the fused magnesite；Partial size≤0.088mm of fused magnesite fine powder.
C content >=90wt% of the crystalline flake graphite, partial size≤0.074mm of crystalline flake graphite.
The Cr7C3The Cr of powder7C3>=88%wt%, Cr7C3Partial size≤0.088mm of powder.
Due to the adoption of the above technical scheme, compared with the prior art, the present invention has the following advantages:
1, the used Cr of the present invention7C3Powder does not generate Cr VI in use process as antioxidant, environmentally protective.
2, of the invention by fused magnesite particle, fused magnesite fine powder, crystalline flake graphite, antioxidant Cr7C3Powder and phenolic aldehyde tree
Rouge sequentially mixes, and is kneaded, compression moulding, dries 12h to get sintering free low carbon magnesia carbon brick is arrived.Simple process is suitble to industry
Metaplasia produces.
3, the Cr that antioxidant of the present invention uses7C3Powder is oxidized prior to C at high temperature, the oxygen that simultaneous oxidation generates
Change chromium to react with magnesia, form magnesia chrome spinel, make sintering free low carbon magnesia carbon brick finer and close to a certain extent, improves
The inoxidizability of sintering free low carbon magnesia carbon brick.Cr simultaneously7C3Powder is also used as carbon source, provides one for sintering free low carbon magnesia carbon brick
Divide carbon, maintains higher carbon content in sintering free low carbon magnesia carbon brick.
Sintering free low carbon magnesia carbon brick is through detecting prepared by the present invention: bulk density is 3.02~3.13gcm-3, anti-folding is by force
Degree is 10.8~13.9MPa, and compressive resistance is 48.7~59.6MPa；After 1600 DEG C of 3h Oxidation Resistance Tests: bulk density 2.82
~2.96gcm-3, practical decarburized depth is 3.8~5.5mm.
Therefore, the present invention has the characteristics that environmentally protective and simple process；Prepared sintering free low carbon magnesia carbon brick intensity is big,
Without cracking, consistency height and oxidation resistant.
Specific embodiment
The invention will be further described With reference to embodiment, not to the limitation of its protection scope.
It is first that material Unify legislation involved in present embodiment is as follows to avoid repeating, it is no longer superfluous in embodiment
It states:
Content of MgO >=95wt% of the fused magnesite；Partial size≤0.088mm of fused magnesite fine powder.
C content >=90wt% of the crystalline flake graphite, partial size≤0.074mm of crystalline flake graphite.
The Cr7C3The Cr of powder7C3>=88%wt%, Cr7C3Partial size≤0.088mm of powder.
Embodiment 1
A kind of sintering free low carbon magnesia carbon brick and preparation method thereof.Preparation method described in the present embodiment is:
With the fused magnesite particle of 65~69wt%, the scale stone of the fused magnesite fine powder of 24~28wt% and 5~8wt%
Ink is raw material, the Cr of the additional 1~2wt% of raw material7C3The phenolic resin of powder and 2~4wt%；Under agitation, by institute
State material content, the Cr7C3The magnesia particle is first pressed the size grading by powder content and the phenolic resin content
It is uniformly mixed, sequentially adds half, the crystalline flake graphite, the fused magnesite fine powder, the Cr of the phenolic resin7C3
Powder and the remaining phenolic resin, obtain mixture；By mixture compression moulding under the conditions of 120~140MPa,
Dry 12h, is made sintering free low carbon magnesia carbon brick under the conditions of 200 DEG C.
The size grading of the fused magnesite particle is: partial size < 5mm and >=3mm account for fused magnesite particle 34~
36wt%, partial size < 3mm and >=1mm account for fused magnesite 34~36wt% of particle, partial size < 1mm and >=0.088mm accounts for electric-melting magnesium
28~30wt% of sand particle.
Embodiment 2
A kind of sintering free low carbon magnesia carbon brick and preparation method thereof.Preparation method described in the present embodiment is:
With the fused magnesite particle of 68~72wt%, the scale stone of the fused magnesite fine powder of 22~26wt% and 4~7wt%
Ink is raw material, the Cr of the additional 2~3wt% of raw material7C3The phenolic resin of powder and 4~5wt%；Under agitation, by institute
State material content, the Cr7C3The magnesia particle is first pressed the size grading by powder content and the phenolic resin content
It is uniformly mixed, sequentially adds half, the crystalline flake graphite, the fused magnesite fine powder, the Cr of the phenolic resin7C3
Powder and the remaining phenolic resin, obtain mixture；By mixture compression moulding under the conditions of 140~160MPa,
Dry 12h, is made sintering free low carbon magnesia carbon brick under the conditions of 200 DEG C.
The size grading of the fused magnesite particle is: partial size < 5mm and >=3mm account for fused magnesite particle 35~
37wt%, partial size < 3mm and >=1mm account for fused magnesite 35~37wt% of particle, partial size < 1mm and >=0.088mm accounts for electric-melting magnesium
27~29wt% of sand particle.
Embodiment 3
A kind of sintering free low carbon magnesia carbon brick and preparation method thereof.Preparation method described in the present embodiment is:
With the fused magnesite particle of 71~75wt%, the scale stone of the fused magnesite fine powder of 20~24wt% and 3~6wt%
Ink is raw material, the Cr of the additional 3~4wt% of raw material7C3The phenolic resin of powder and 5~6wt%；Under agitation, by institute
State material content, the Cr7C3The magnesia particle is first pressed the size grading by powder content and the phenolic resin content
It is uniformly mixed, sequentially adds half, the crystalline flake graphite, the fused magnesite fine powder, the Cr of the phenolic resin7C3
Powder and the remaining phenolic resin, obtain mixture；By mixture compression moulding under the conditions of 160~180MPa,
Dry 12h, is made sintering free low carbon magnesia carbon brick under the conditions of 200 DEG C.
The size grading of the fused magnesite particle is: partial size < 5mm and >=3mm account for fused magnesite particle 36~
38wt%, partial size < 3mm and >=1mm account for fused magnesite 36~38wt% of particle, partial size < 1mm and >=0.088mm accounts for electric-melting magnesium
24~26wt% of sand particle.
Embodiment 4
A kind of sintering free low carbon magnesia carbon brick and preparation method thereof.Preparation method described in the present embodiment is:
With the fused magnesite particle of 74~78wt%, the scale stone of the fused magnesite fine powder of 18~22wt% and 2~5wt%
Ink is raw material, the Cr of the additional 2~3wt% of raw material7C3The phenolic resin of powder and 5~6wt%；Under agitation, by institute
State material content, the Cr7C3The magnesia particle is first pressed the size grading by powder content and the phenolic resin content
It is uniformly mixed, sequentially adds half, the crystalline flake graphite, the fused magnesite fine powder, the Cr of the phenolic resin7C3
Powder and the remaining phenolic resin, obtain mixture；By mixture compression moulding under the conditions of 180~200MPa,
Dry 12h, is made sintering free low carbon magnesia carbon brick under the conditions of 200 DEG C.
The size grading of the fused magnesite particle is: partial size < 5mm and >=3mm account for fused magnesite particle 38~
40wt%, partial size < 3mm and >=1mm account for fused magnesite 32~34wt% of particle, partial size < 1mm and >=0.088mm accounts for electric-melting magnesium
26~28wt% of sand particle.
Present embodiment has the advantage that compared with prior art
1, the used Cr of present embodiment7C3Powder does not generate Cr VI in use process as antioxidant, green
Colour circle is protected.
2, present embodiment is by fused magnesite particle, fused magnesite fine powder, crystalline flake graphite, antioxidant Cr7C3Powder
It sequentially mixes, is kneaded, compression moulding with phenolic resin, dry 12h to get sintering free low carbon magnesia carbon brick is arrived.Simple process,
It is suitble to industrialized production.
3, the Cr that present embodiment antioxidant uses7C3Powder is oxidized prior to C at high temperature, simultaneous oxidation
The chromium oxide of generation reacts with magnesia, forms magnesia chrome spinel, makes sintering free low carbon magnesia carbon brick to a certain extent more
Densification improves the inoxidizability of sintering free low carbon magnesia carbon brick.Cr simultaneously7C3Powder is also used as carbon source, mentions for sintering free low carbon magnesia carbon brick
A part of carbon has been supplied, higher carbon content in sintering free low carbon magnesia carbon brick is maintained.
The sintering free low carbon magnesia carbon brick of present embodiment preparation is through detecting: bulk density is 3.02~3.13gcm-3,
Flexural strength is 10.8~13.9MPa, and compressive resistance is 48.7~59.6MPa；After 1600 DEG C of 3h Oxidation Resistance Tests: bulk density
For 2.82~2.96gcm-3, practical decarburized depth is 3.8~5.5mm.
Therefore, present embodiment has the characteristics that environmentally protective and simple process；Prepared sintering free low carbon magnesium carbon
Brick intensity is big, without cracking, consistency is high and oxidation resistant.
Claims (5)
1. a kind of preparation method of sintering free low carbon magnesia carbon brick, it is characterised in that the preparation method is: with the electricity of 65~78wt%
The crystalline flake graphite of fused magnesia particle, the fused magnesite fine powder of 18~28wt% and 2~8wt% is raw material, the additional raw material 1~
The Cr of 4wt%7C3The phenolic resin of powder and 2~6wt%；Under agitation, by the material content, the Cr7C3Powder
The magnesia particle is first uniformly mixed by content and the phenolic resin content by the size grading, is sequentially added described
The half of phenolic resin, the crystalline flake graphite, the fused magnesite fine powder, the Cr7C3Powder and the remaining phenolic aldehyde tree
Rouge obtains mixture；By mixture compression moulding under the conditions of 120~200MPa, dry 12h, system under the conditions of 200 DEG C
Obtain sintering free low carbon magnesia carbon brick；
The size grading of the fused magnesite particle is: partial size < 5mm and >=3mm accounts for fused magnesite 34~40wt% of particle, grain
Diameter < 3mm and >=1mm account for fused magnesite 32~38wt% of particle, partial size < 1mm and >=0.088mm account for fused magnesite particle 24~
30wt%.
2. the preparation method of sintering free low carbon magnesia carbon brick according to claim 1, it is characterised in that the MgO of the fused magnesite
Content >=95wt%；Partial size≤0.088mm of fused magnesite fine powder.
3. the preparation method of sintering free low carbon magnesia carbon brick according to claim 1, it is characterised in that the C of the crystalline flake graphite contains
Amount >=90wt%, partial size≤0.074mm of crystalline flake graphite.
4. the preparation method of sintering free low carbon magnesia carbon brick according to claim 1, it is characterised in that the Cr7C3Powder
Cr7C3>=88%wt%, Cr7C3Partial size≤0.088mm of powder.
5. a kind of sintering free low carbon magnesia carbon brick, it is characterised in that the sintering free low carbon magnesia carbon brick is Xiang Zhongren according to claim 1~4
Sintering free low carbon magnesia carbon brick prepared by the preparation method of sintering free low carbon magnesia carbon brick described in one.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112341163A (en) * | 2020-11-17 | 2021-02-09 | 武汉科技大学 | Addition of C @ Cr3C2Low-carbon magnesia-carbon refractory material of composite powder and preparation method thereof |
| CN114409417A (en) * | 2022-01-17 | 2022-04-29 | 瑞泰马钢新材料科技有限公司 | Gate valve sliding plate brick for converter slag stopping and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102584277A (en) * | 2012-01-12 | 2012-07-18 | 武汉科技大学 | Low-carbon magnesia carbon bricks and preparation method thereof |
| CN105272320A (en) * | 2015-12-04 | 2016-01-27 | 武汉科技大学 | Unfired Al2O3-Cr7C3 brick for hot metal ladle wall and preparation method thereof |
| CN105906349A (en) * | 2016-04-15 | 2016-08-31 | 武汉科技大学 | Refractory castable for blast furnace tapping trough swing launder and preparation method thereof |
-
2019
- 2019-06-28 CN CN201910579975.7A patent/CN110255970A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102584277A (en) * | 2012-01-12 | 2012-07-18 | 武汉科技大学 | Low-carbon magnesia carbon bricks and preparation method thereof |
| CN105272320A (en) * | 2015-12-04 | 2016-01-27 | 武汉科技大学 | Unfired Al2O3-Cr7C3 brick for hot metal ladle wall and preparation method thereof |
| CN105906349A (en) * | 2016-04-15 | 2016-08-31 | 武汉科技大学 | Refractory castable for blast furnace tapping trough swing launder and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 冶金部氧气转炉顶底复合吹炼技术攻关专家组等: "《氧气转炉炼钢顶底复合吹炼技术 "七五"攻关资料汇编 1986-1990 第1册》", 31 December 1992 * |
| 王泽田等: "《复吹转炉炼钢用耐火材料基础研究论文集》", 31 October 1992 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112341163A (en) * | 2020-11-17 | 2021-02-09 | 武汉科技大学 | Addition of C @ Cr3C2Low-carbon magnesia-carbon refractory material of composite powder and preparation method thereof |
| CN114409417A (en) * | 2022-01-17 | 2022-04-29 | 瑞泰马钢新材料科技有限公司 | Gate valve sliding plate brick for converter slag stopping and preparation method thereof |
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