CN104844239A - Environmental-friendly magnesia carbon brick and production method thereof - Google Patents
Environmental-friendly magnesia carbon brick and production method thereof Download PDFInfo
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- CN104844239A CN104844239A CN201510292633.9A CN201510292633A CN104844239A CN 104844239 A CN104844239 A CN 104844239A CN 201510292633 A CN201510292633 A CN 201510292633A CN 104844239 A CN104844239 A CN 104844239A
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Abstract
The invention relates to an environmental-friendly magnesia carbon brick and a production method thereof. The environmental-friendly magnesia carbon brick comprises the following components in percentage by weight: 55%-85% of magnesia granules, 5%-25% of fine magnesia powder, 0.01%-15% of carbon raw materials, 0.05%-5% of asphalt, 0.1%-10% of antioxidants and 2%-6% of organic bonding agents, wherein the softening point of the asphalt is 170-250 DEG C, and the content of benzopyrene is lower than 300 ppm. The production method comprises the following steps of co-grinding the fine magnesia powder, the carbon raw materials, the ultrahigh-temperature asphalt and the antioxidants according to the proportion to obtain prefabricated mixed powder; and then uniformly mixing the magnesia granules and the organic bonding agent, then adding the prefabricated mixed powder for uniform mixing, discharging, and forming. The production method disclosed by the invention can be used for introducing the environmental-friendly ultrahigh-temperature asphalt into the magnesia carbon brick, thereby reducing the influence on the health of working personnel and the environmental pollution and improving the high-temperature property of a refractory material.
Description
Technical field
The present invention relates to magnesia carbon brick field, specifically disclose a kind of environment friendly magnesium carbon brick and production method thereof.
Background technology
Magnesia carbon brick is the novel refractory that 20 century 70s rise, and it is with magnesia high temperature sintering, the good characteristic such as have that refractoriness is high, heat-shock resistance is excellent and corrosion resistance is strong and be widely used in iron and steel enterprise, as converter steelmaking and Electric furnace steel making.
Magnesia carbon brick is for raw material is not by obtained the burning or light-burned goods of manufacturing technique requirent with magnesia, carbon materials and antioxidant etc.Due to the unreactiveness of carbon materials, it is difficult to and magnesium oxide direct combination, so the quality of bonding agent directly affects the quality of magnesia carbon brick.The critical stage of carbon containing refractory development can think the stage finding bonding agent.The research of bonding agent is the research emphasis of carbon containing refractory always, and the bonding agent of current carbon containing refractory is mainly divided into three types: (1) bitumen; (2) resinous matter; (3) on the basis of pitch and resin, through the material that modification obtains.
Bitumen: pitch is a kind of thermoplastic material, have with graphite, magnesium oxide avidity large, after charing, Residual carbon is high, the feature that cost is low, and past attempts uses in a large number; But containing carcinogenic aromatic hydrocarbon in pitch, especially benzopyrene content is high, due to the reinforcement of environmental consciousness, the usage quantity of present pitch is in minimizing.
Resinous matter: resol has phenol and formaldehyde reaction to obtain, and just well can mix with fire resisting material particle at normal temperatures, after charing, Residual carbon is high, is the main bonding agent of current production magnesia carbon brick; But resol also also exists many deficiencies:
Middle temperature area intensity is low: due to the decomposition of resin-bonded, reduce intensity, therefore, produces oxidation when the position being in temperature area in this uses, " face is waste " equivalent damage;
Oxidisability is poor: resol carries out carbonization in solid phase, the normally isotropic vitreous carbon of carbonized product, after pyroprocessing, be difficult to greying, and in carbonized product, leave a large amount of fine pores structures, so the general comparatively asphalt carbonization product of resistance of oxidation is for poor.
The problem of prior art is: the carcinogens content of bitumen bonding agent is very high, can discharge toxic smog in bake process, causes personnel's somatic damage and environmental pollution; Be organized as vitreous texture after the carbonization of resinous matter bonding agent, to the heat-shock resistance of refractory materials and oxidation-resistance all undesirable.
Summary of the invention
The object of the invention is to: provide a kind of minimizing to Health Impact and environmental pollution, the environment friendly magnesium carbon brick improving high-temperature material fire performance and production method thereof for overcoming the above problems.
The technical solution adopted in the present invention is such:
A kind of environment friendly magnesium carbon brick, its moiety and weight percent as follows: magnesia particle 55 ~ 85%, magnesia powder 5 ~ 25%, carbon raw material 0.01 ~ 15%, pitch 0.05 ~ 5%, antioxidant 0.1 ~ 10%, organic bond 2 ~ 6%; The softening temperature of described pitch is 170 ~ 250 DEG C, and the content of benzopyrene is lower than 300ppm.
Further, in described magnesia particle the mass percent of MgO be 94 ~ 99%, granularity 0.088 ~ 5mm;
Further, the mass percent of the MgO of described magnesia powder is 94 ~ 99%, granularity is less than 0.088mm.
Further, described carbon raw material is one or more in graphite, carbon black, asphalt powder, resin-oatmeal.
Further, described antioxidant is Al powder, Si powder, Mg powder, B
4one or more mixtures in C powder, SiC powder, Al-Mg alloy powder.
Further, described organic bond is one or more mixtures in coal-tar pitch, solid, powdery resol, heat curing-type liquid phenolic resin, thermoplastic liquid phenolic resin.
The production method of above-mentioned a kind of environment friendly magnesium carbon brick,
Magnesia powder, carbon raw material, pitch, antioxidant are ground altogether, obtains prefabricated powder mix; Again magnesia particle, organic bond are mixed, then add prefabricated powder mix and mix, get final product discharging, shaping.
Further, the magnesia carbon brick after shaping need thermal treatment under 100 ~ 300 DEG C of conditions.
In sum, owing to adopting technique scheme, the invention has the beneficial effects as follows:
Environmental protection ultra-temperature pitch is incorporated in magnesia carbon brick by the present invention, Some substitute organic bond is also dispersed in refractory materials, on the one hand, the toxic smog formed when efficiently solving the baking of plain asphalt bonding agent, decreases the staff's somatic damage and environmental pollution that cause thus; On the other hand, form vitreous texture after efficiently solving the carbonization of resene bonding agent, after making bonding agent carbonization, can pattern structure be formed, improve refractory materials high-temperature behavior.
Embodiment
All features disclosed in this specification sheets, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Embodiment 1
A kind of environment friendly magnesium carbon brick, its moiety and weight percent as follows: magnesia particle 60%, magnesia powder 20%, carbon raw material 10%, pitch 2%, antioxidant 5%, organic bond 3%; The softening temperature of described pitch is 200 DEG C, and the content of benzopyrene is lower than 300ppm, and environmental protection ultrahigh-temperature, reduces the harm to human body and environment.
In described magnesia particle, the mass percent of MgO is 95%, in magnesia particle: the per-cent of granularity 3 ~ 5mm is 25%, and the per-cent of granularity 1 ~ 3mm is 20%, and the per-cent of granularity 0.088 ~ 1mm is 15%;
The mass percent of the MgO of described magnesia powder is 95%, granularity 0 ~ 0.088mm.
Described carbon raw material is the mixture of graphite, carbon black, asphalt powder, resin-oatmeal.
Described antioxidant is Al powder, Si powder, Mg powder, B
4the mixture of C powder.
Described organic bond is the mixture of coal-tar pitch, solid, powdery resol, thermoplastic liquid phenolic resin.
Embodiment 2
A kind of environment friendly magnesium carbon brick, its moiety and weight percent as follows: magnesia particle 72%, magnesia powder 9%, carbon raw material 13%, pitch 2%, antioxidant 2%, organic bond 2%; The softening temperature of described pitch is 200 DEG C, and the content of benzopyrene is lower than 300ppm, and environmental protection ultrahigh-temperature, reduces the harm to human body and environment.
In described magnesia particle, the mass percent of MgO is 95%, in magnesia particle: the per-cent of granularity 3 ~ 5mm is 25%, and the per-cent of granularity 1 ~ 3mm is 25%, and the per-cent of granularity 0.088 ~ 1mm is 22%;
The mass percent of the MgO of described magnesia powder is 95%, granularity 0 ~ 0.088mm.
Described carbon raw material is the mixture of carbon black, asphalt powder, resin-oatmeal.
Described antioxidant is the mixture of Si powder, Mg powder, SiC powder, Al-Mg alloy powder.
Described organic bond is thermoplastic liquid phenolic resin.
Embodiment 3
A kind of environment friendly magnesium carbon brick, its moiety and weight percent as follows: magnesia particle 70%, magnesia powder 15%, carbon raw material 5%, pitch 4%, antioxidant 3%, organic bond 3%; The softening temperature of described pitch is 220 DEG C, and the content of benzopyrene is lower than 300ppm, and environmental protection ultrahigh-temperature, reduces the harm to human body and environment.
In described magnesia particle, the mass percent of MgO is 95%, in magnesia particle: the per-cent of granularity 3 ~ 5mm is 25%, and the per-cent of granularity 1 ~ 3mm is 20%, and the per-cent of granularity 0.088 ~ 1mm is 25%;
The mass percent of the MgO of described magnesia powder is 95%, granularity 0 ~ 0.088mm.
Described carbon raw material is the mixture of asphalt powder, resin-oatmeal.
Described antioxidant is the mixture of Si powder, Mg powder, Al-Mg alloy powder.
Described organic bond is the mixture of coal-tar pitch, thermoplastic liquid phenolic resin.The moiety of magnesia carbon brick and degree difference, but its production method is identical, as follows:
A production method for environment friendly magnesium carbon brick,
According to the above ratio, magnesia powder, carbon raw material, pitch, antioxidant are ground altogether, obtain prefabricated powder mix; Again magnesia particle, organic bond are mixed, then add prefabricated powder mix and mix, get final product discharging, shaping.Magnesia carbon brick after shaping need thermal treatment under 100 ~ 300 DEG C of conditions.
Above-described specific embodiment, further describes object of the present invention, technical scheme and beneficial effect, and institute it should be understood that and the foregoing is only specific embodiments of the invention, is not limited to the present invention.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (8)
1. an environment friendly magnesium carbon brick, is characterized in that: its moiety and weight percent as follows: magnesia particle 55 ~ 85%, magnesia powder 5 ~ 25%, carbon raw material 0.01 ~ 15%, pitch 0.05 ~ 5%, antioxidant 0.1 ~ 10%, organic bond 2 ~ 6%; The softening temperature of described pitch is 170 ~ 250 DEG C, and the content of benzopyrene is lower than 300ppm.
2. a kind of environment friendly magnesium carbon brick according to claim 1, is characterized in that: in described magnesia particle the mass percent of MgO be 94 ~ 99%, granularity 0.088 ~ 5mm.
3. a kind of environment friendly magnesium carbon brick according to claim 1, is characterized in that: the mass percent of the MgO of described magnesia powder is 94 ~ 99%, granularity is less than 0.088mm.
4. a kind of environment friendly magnesium carbon brick according to claim 1, is characterized in that: described carbon raw material is one or more in graphite, carbon black, asphalt powder, resin-oatmeal.
5. a kind of environment friendly magnesium carbon brick according to claim 1, is characterized in that: described antioxidant is Al powder, Si powder, Mg powder, B
4one or more mixtures in C powder, SiC powder, Al-Mg alloy powder.
6. a kind of environment friendly magnesium carbon brick according to claim 1, is characterized in that: described organic bond is one or more mixtures in coal-tar pitch, solid, powdery resol, heat curing-type liquid phenolic resin, thermoplastic liquid phenolic resin.
7. a production method for environment friendly magnesium carbon brick as claimed in claim 1, is characterized in that:
Magnesia powder, carbon raw material, pitch, antioxidant are ground altogether, obtains prefabricated powder mix; Again magnesia particle, organic bond are mixed, then add prefabricated powder mix and mix, get final product discharging, shaping.
8. the production method of a kind of environment friendly magnesium carbon brick according to claim 7, is characterized in that: the magnesia carbon brick after shaping need thermal treatment under 100 ~ 300 DEG C of conditions.
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| CN201510292633.9A CN104844239A (en) | 2015-05-29 | 2015-05-29 | Environmental-friendly magnesia carbon brick and production method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967657A (en) * | 2016-05-04 | 2016-09-28 | 黄河科技学院 | Environmentally friendly refractory material and preparation method thereof |
| CN111517761A (en) * | 2020-04-16 | 2020-08-11 | 北京利尔高温材料股份有限公司 | Composite lining material and application method thereof |
| CN112028614A (en) * | 2020-09-02 | 2020-12-04 | 江苏苏嘉集团新材料有限公司 | Fracture-resistant high-strength-toughness magnesia carbon brick |
| CN113461407A (en) * | 2021-09-02 | 2021-10-01 | 北京利尔高温材料股份有限公司 | Low-carbon magnesia carbon brick with oxidation resistance and preparation method thereof |
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| US4912068A (en) * | 1988-11-21 | 1990-03-27 | Dresser Industries, Inc. | Magnesite-carbon refractories |
| CN102276997A (en) * | 2011-08-05 | 2011-12-14 | 上海应用技术学院 | Modified coal pitch material as well as preparation method and application thereof |
| CN103304248A (en) * | 2013-06-08 | 2013-09-18 | 常州苏瑞纳碳科技有限公司 | Low-carbon magnesia-carbon refractory material and preparation method thereof |
-
2015
- 2015-05-29 CN CN201510292633.9A patent/CN104844239A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4912068A (en) * | 1988-11-21 | 1990-03-27 | Dresser Industries, Inc. | Magnesite-carbon refractories |
| CN102276997A (en) * | 2011-08-05 | 2011-12-14 | 上海应用技术学院 | Modified coal pitch material as well as preparation method and application thereof |
| CN103304248A (en) * | 2013-06-08 | 2013-09-18 | 常州苏瑞纳碳科技有限公司 | Low-carbon magnesia-carbon refractory material and preparation method thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105967657A (en) * | 2016-05-04 | 2016-09-28 | 黄河科技学院 | Environmentally friendly refractory material and preparation method thereof |
| CN111517761A (en) * | 2020-04-16 | 2020-08-11 | 北京利尔高温材料股份有限公司 | Composite lining material and application method thereof |
| CN112028614A (en) * | 2020-09-02 | 2020-12-04 | 江苏苏嘉集团新材料有限公司 | Fracture-resistant high-strength-toughness magnesia carbon brick |
| CN113461407A (en) * | 2021-09-02 | 2021-10-01 | 北京利尔高温材料股份有限公司 | Low-carbon magnesia carbon brick with oxidation resistance and preparation method thereof |
| CN113461407B (en) * | 2021-09-02 | 2022-01-07 | 北京利尔高温材料股份有限公司 | Low-carbon magnesia carbon brick with oxidation resistance and preparation method thereof |
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Application publication date: 20150819 |