CN107285744A - A kind of ladle low carbon magnesia carbon brick and preparation method thereof - Google Patents

A kind of ladle low carbon magnesia carbon brick and preparation method thereof Download PDF

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Publication number
CN107285744A
CN107285744A CN201710586908.9A CN201710586908A CN107285744A CN 107285744 A CN107285744 A CN 107285744A CN 201710586908 A CN201710586908 A CN 201710586908A CN 107285744 A CN107285744 A CN 107285744A
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parts
granularity
low carbon
granularities
mesh
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Inventor
张胜男
王新杰
张义先
尹斌
金钊
王健骁
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Haicheng Zhongxing High-Grade Magnesia Brick Co Ltd
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Haicheng Zhongxing High-Grade Magnesia Brick Co Ltd
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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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/03—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite
    • C04B35/04—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on magnesium oxide, calcium oxide or oxide mixtures derived from dolomite based on magnesium oxide
    • C04B35/043—Refractories from grain sized mixtures
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
    • C04B2235/3244—Zirconium oxides, zirconates, hafnium oxides, hafnates, or oxide-forming salts thereof
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3817—Carbides
    • C04B2235/3826—Silicon carbides
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/40—Metallic constituents or additives not added as binding phase
    • C04B2235/402—Aluminium
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422—Carbon
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/42—Non metallic elements added as constituents or additives, e.g. sulfur, phosphor, selenium or tellurium
    • C04B2235/422—Carbon
    • C04B2235/425—Graphite
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/74—Physical characteristics
    • C04B2235/77—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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • 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
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
    • C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
    • C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient

Abstract

The invention provides a kind of ladle low carbon magnesia carbon brick and preparation method thereof, it is to replace part fused magnesite to make low carbon magnesia carbon brick with magnesium zircon sand, using variable grain level fused magnesite, magnesium zircon sand and the crystalline flake graphite matched somebody with somebody as primary raw material, using phenolic resin, modified pitch as bonding agent, by adding antioxidant, heat-resistant knocking stability, the anti-permeability performance of low carbon magnesia carbon brick are improved.

Description

A kind of ladle low carbon magnesia carbon brick and preparation method thereof
Technical field
The present invention relates to a kind of ladle low carbon magnesia carbon brick and preparation method thereof.
Background technology
Carbon composite is the class novel refractory for starting 1980s to grow up, wherein Mg0-C fire resistings Material is one of most important of which kind, and converter, electric furnace, ladle and slide plate and external refining etc. are still widely used for so far Aspect.
With the progress of smelting technique, in recent years, furnace outer refining process is all being greatly developed in countries in the world, mild steel and super The yield more and more higher of mild steel, in order to improve the quality of steel, the problems such as traditional magnesia-carbon refractory material is due to carburetting can not Use requirement is met, in the case, the Low-carbon magnesia-carbon refractory material compared with low carbon content turns into the development of magnesia-carbon refractory material newly Focus.
For magnesia-carbon refractory material, its excellent performance essentially consists in carbon, reduces carbon content, certainly will cause material The decline of some performances：On the one hand, the thermal conductivity of material declines, modulus of elasticity increase, so that the thermal shock resistance of material is deteriorated, On the other hand, after carbon content reduction, making the wetability of slag and material strengthens, and the permeability resistance of material is deteriorated.
Therefore low carbon magnesium refractory material is produced, it is necessary to solve its thermal shock resistance variation, the problem of permeability resistance is deteriorated.
The content of the invention
It is to replace portion with magnesium zircon sand it is an object of the invention to provide a kind of ladle low carbon magnesia carbon brick and preparation method thereof Point fused magnesite makes low carbon magnesia carbon brick, fused magnesite, magnesium zircon sand and the crystalline flake graphite matched somebody with somebody using variable grain level as primary raw material, Using phenolic resin, modified pitch as bonding agent, by adding antioxidant, improve the heat-resistant knocking stability of low carbon magnesia carbon brick, resist Permeance property.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of ladle low carbon magnesia carbon brick, is prepared from by the raw material of following parts by weight：0<Granularity≤1mm magnesium zirconium 1-8 parts of sand, 1mm<Granularity≤3mm 2-10 parts of magnesium zircon sand, 3mm<Granularity≤4-12 parts of 5mm magnesium zircon sands, 5mm<Granularity≤8mm's 2-10 parts of magnesium zircon sand, 0<Granularity≤1mm 15-25 parts of fused magnesite, 1mm<Granularity≤3mm 15-30 parts of fused magnesite, 3mm< Granularity≤5mm 15-25 parts of fused magnesite, 5mm<10-35 parts of the fused magnesites of granularity≤8,18-28 parts of 200 mesh fused magnesite, Below 4 parts of crystalline flake graphite, below 0.5-5 parts of 325 mesh aluminium powder, 5 parts of 200 mesh carborundum powder, 0.5-10 parts of phenolic resin, modified drip It is blue or green less than 10 parts.
Described fused magnesite, the percentage by weight of its chemical constituent is：MgO >=96.5%, CaO≤1.5%, SiO2≤ 1.2%th, Fe2O3≤ 0.6%；Body is close >=3.45g/ ㎝3。
Described magnesium zircon sand, the percentage by weight of its chemical constituent is：MgO >=90.5%, ZrO2>=4.5%, CaO≤ 1.0%th, SiO2≤ 2.0%, Al2O3≤ 0.2%；Body is close >=3.4g/ ㎝3。
The granularity of the crystalline flake graphite is 100 mesh；C weight percent content >=95.0%.
The granularity of the metallic aluminium powder is 325 mesh；Al weight percent content >=99.0%.
The granularity of the carborundum powder is 200 mesh；SiC weight percent content >=97.0%.
The phenolic resin, the percentage by weight and index of its chemical constituent are：Solid content >=80%, carbon residue >=46%, Free phenol≤10%, moisture≤3.0%；PH value 6~7.
The index of the modified pitch is：Weight percent content >=71% of carbon residue, the weight percent content of ash content ≤ 0.1%.
A kind of preparation method of ladle low carbon magnesia carbon brick, comprises the following steps：
1) fused magnesite is crushed in jaw crusher, sieved as 0 ＜ granularities≤1mm, 1mm ＜ granularities≤3mm, 3mm Raw material below ＜ granularities≤5mm, 5mm ＜ granularities≤8mm, 200 mesh；
Magnesium zircon sand is crushed in jaw crusher, sieved as 0 ＜ granularities≤1mm, 1mm ＜ granularities≤3mm, 3mm ＜ Degree≤5mm, 5mm ＜ granularities≤8mm particulate material；
2) raw material is weighed by above-mentioned parts by weight, closed standby；
3) carborundum powder, aluminium powder, modified pitch are well mixed in dry type vibratory mill, common milling is made；
4) by above-mentioned steps 1) in obtained fused magnesite particle carry out mixing 2~5 minutes with magnesium zircon sand particle, disposably It is slowly added to phenolic resin wet mixing 2~3 minutes, adds crystalline flake graphite and mix 1~2 minute, be eventually adding above-mentioned steps 3) in The common milling arrived discharges after mixing 22~28 minutes；
5) it is molded on brick machine；
6) by the magnesia carbon brick after shaping, heat treatment more than 24 hours is dried, wherein entering kilneye temperature is not higher than 60 DEG C, the temperature The lower baking of degree more than 8 hours；110 DEG C are toasted more than 8 hours；150~250 DEG C are toasted more than 8 hours.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention replaces fused magnesite making low carbon magnesia carbon brick in part with magnesium zircon sand, using zirconium oxide chemical stability and The effect of its " phase transformation is given tough ", improves the thermal shock resistance and corrosion resistance of low carbon magnesia carbon brick.
Addition modified pitch can make to form AION, MgA1 in material204Nanometer rods and zyklopisch structure, to improving low-carbon magnesium The performance of carbon material is favourable.Because pitch carbonization temperature is high, still there is certain mobility at a higher temperature, tree can be penetrated into In the space of fat charcoal, combined well with phenolic resin carbon, mosaic texture formed after charing, improve the carbon bond strength of material, So as to improve the performance particularly high-temperature behavior of Magnesia-carbon material.In addition, the addition of pitch can promote what metal A1 was generated after aoxidizing A1203Reaction with Mg0 forms MgA1204, improve material property.
Embodiment
The embodiment to the present invention is described further below：
A kind of ladle low carbon magnesia carbon brick, is prepared from by the raw material of following parts by weight：0<Granularity≤1mm magnesium zirconium 1-8 parts of sand, 1mm<Granularity≤3mm 2-10 parts of magnesium zircon sand, 3mm<Granularity≤4-12 parts of 5mm magnesium zircon sands, 5mm<Granularity≤8mm's 2-10 parts of magnesium zircon sand, 0<Granularity≤1mm 15-25 parts of fused magnesite, 1mm<Granularity≤3mm 15-30 parts of fused magnesite, 3mm< Granularity≤5mm 15-25 parts of fused magnesite, 5mm<10-35 parts of fused magnesite, 200 mesh (the being less than 0.074mm) electricity of granularity≤8 Below 18-28 parts of fused magnesia, 4 parts of crystalline flake graphite, 325 mesh (be less than 0.045mm) 0.5-5 parts of aluminium powder, 200 mesh (are less than 0.074mm) below 5 parts of carborundum powder, below 0.5-10 parts of phenolic resin, 10 parts of modified pitch.
Described fused magnesite, the mass percent of its chemical constituent is：MgO >=96.5%, CaO≤1.5%, SiO2≤ 1.2%th, Fe2O3≤ 0.6%；Body is close >=3.45g/ ㎝3。
Described magnesium zircon sand, the mass percent of its chemical constituent is：MgO >=90.5%, ZrO2>=4.5%, CaO≤ 1.0%th, SiO2≤ 2.0%, Al2O3≤ 0.2%；Body is close >=3.4g/ ㎝3。
The granularity of the crystalline flake graphite is 100 mesh；C weight/mass percentage composition >=95.0%.
The granularity of the metallic aluminium powder is 325 mesh；Al weight/mass percentage composition >=99.0%.
The granularity of the carborundum powder is 200 mesh；SiC weight/mass percentage composition >=97.0%.
The phenolic resin, the mass percent and index of its chemical constituent are：Solid content >=80%, carbon residue >=46%, Free phenol≤10%, moisture≤3.0%；PH value 6~7.
The index of the modified pitch is：Weight/mass percentage composition >=71% of carbon residue, the weight/mass percentage composition of ash content≤ 0.1%.
A kind of preparation method of ladle low carbon magnesia carbon brick, comprises the following steps：
1) fused magnesite is crushed in jaw crusher, sieved as 0 ＜ granularities≤1mm, 1mm ＜ granularities≤3mm, 3mm Raw material below ＜ granularities≤5mm, 5mm ＜ granularities≤8mm, 200 mesh；
Magnesium zircon sand is crushed in jaw crusher, sieved as 0 ＜ granularities≤1mm, 1mm ＜ granularities≤3mm, 3mm ＜ Degree≤5mm, 5mm ＜ granularities≤8mm particulate material；
2) raw material is weighed by above-mentioned parts by weight, closed standby；
3) carborundum powder, aluminium powder, modified pitch are well mixed in dry type vibratory mill, common milling is made；
4) by above-mentioned steps 1) in obtained fused magnesite particle carry out mixing 2~5 minutes with magnesium zircon sand particle, disposably It is slowly added to phenolic resin wet mixing 2~3 minutes, adds crystalline flake graphite and mix 1~2 minute, be eventually adding above-mentioned steps 3) in The common milling arrived discharges after mixing 22~28 minutes.
5) it is molded on brick machine；Forming operation will observe three side clothes, and the principle of first light rear weight is operated.
6) by the magnesia carbon brick after shaping, heat treatment more than 24 hours is dried, wherein entering kilneye temperature is not higher than 60 DEG C, the temperature The lower baking of degree more than 8 hours；110 DEG C are toasted more than 8 hours；150~250 DEG C are toasted more than 8 hours.
After magnesia carbon brick comes out from dry kiln, treat that its temperature drops to room temperature, Quality Inspector inspects by random samples to the magnesia carbon brick, inspect by random samples Execution standard is shown in Table 1.
Table 1：The physical and chemical index of low carbon magnesia carbon brick
Project Physical and chemical index
W (MgO), % ≥92
w(SiO2), % ≤0.8
w(ZrO2), % ≥0.67
w(Al2O3), % ≤3
W (CaO), % ≤1
W (C), % ≤4
Igloss ≤5
Bulk density, g/cm3 ≥3.05
Apparent porosity, % ≤2.0
Line changes, % (1600 DEG C × 3h) ≤1
Rupture strength, MPa (1600 DEG C × 3h) ≥18
Compressive resistance, MPa (200 DEG C × 24h) ≥80
Check and accept and pack：
1 checks and accepts：
YB 367-75 are pressed in sampling, the examination of 1.1 material《Refractory product sampling, examination, keeping and transport rule》Carry out.
Chemical composition analysis is done in 1.2 grab sample.
2 packagings, transport, storage and quality certificate：
YB 367-75 are pressed in packaging, transport and the storage of 2.1 material《Refractory product sampling, examination, keeping and transport rule》Enter OK.
2.2 material must be accompanied by the quality certificate that technical supervision department signs and issues when dispatching from the factory, indicate supplier's title or emblem mark, need Square title, Shipping Date, contract number, standard number, name of product, the trade mark, lot number and physical and chemical index, wait result to report.
Embodiment is implemented lower premised on technical solution of the present invention, gives detailed embodiment and specific Operating process, but protection scope of the present invention is not limited to following embodiments.
Method therefor is conventional method unless otherwise instructed in following embodiments.
A kind of formulas of ladle low carbon magnesia carbon brick of 1-3 of the embodiment of the present invention are as shown in table 2：
Table 2：Formula (the unit of embodiment 1-3 low carbon magnesia carbon bricks：%)
Dispensing Embodiment 1 Embodiment 2 Embodiment 3 Embodiment 4 Embodiment 5
5mm-8mm fused magnesites 10 15 30 35 20
3mm-5mm fused magnesites 16 20 18 15 25
1mm-3mm fused magnesites 17 25 20 15 30
1mm-0 fused magnesites 20 22 18 15 25
200 mesh fused magnesites 22 23 25 18 28
5mm-8mm magnesium zircon sands 2 3 8 10 5
3mm-5mm magnesium zircon sands 5 7 10 4 12
1mm-3mm magnesium zircon sands 2 3 8 10 5
1mm-0 magnesium zircon sands 3 5 7 1 8
Crystalline flake graphite 2 3 1.5 4 1
Aluminium powder 2 3 4 0.5 5
Carborundum powder 1.5 1 3 5 4
Phenolic resin 3 5 8 10 0.5
Modified pitch 0.5 5 8.5 10 1
The preparation method of embodiment 1-3 ladle low carbon magnesia carbon brick, method and step is same as above.
A kind of ladle of the present invention uses 0 ＜ granularities≤1mm, 1mm ＜ granularities≤3mm, 3mm ＜ granularities with low carbon magnesia carbon brick ≤ 5mm, 5mm ＜ granularities≤8mm, the following fused magnesite particle of 200 mesh and 0 ＜ granularities≤1mm, 1mm ＜ granularities≤3mm, 3mm ＜ Granularity≤5mm, 5mm ＜ granularities≤8mm magnesium zircon sand particle is used as aggregate.Magnesium zircon sand generation is used compared to prior art For part fused magnesite, chemical stability and its effect of " phase transformation is given tough " using zirconium oxide improve the heat of low carbon magnesia carbon brick Shake stability and corrosion resistance.Phenolic resin and modified pitch are used in combination with agent, modified pitch carbonization temperature is high, higher At a temperature of still have certain mobility, in the space that resin carbon can be penetrated into, combined well with phenolic resin carbon, after charing Mosaic texture is formed, the carbon bond strength of material is improved, so as to improve the performance particularly high-temperature behavior of Magnesia-carbon material.

Claims (9)

1. a kind of ladle low carbon magnesia carbon brick, it is characterised in that be prepared from by the raw material of following parts by weight：0<Granularity≤ 1mm 1-8 parts of magnesium zircon sand, 1mm<Granularity≤3mm 2-10 parts of magnesium zircon sand, 3mm<Granularity≤4-12 parts of 5mm magnesium zircon sands, 5mm<Grain Degree≤8mm 2-10 parts of magnesium zircon sand, 0<Granularity≤1mm 15-25 parts of fused magnesite, 1mm<Granularity≤3mm fused magnesite 15- 30 parts, 3mm<Granularity≤5mm 15-25 parts of fused magnesite, 5mm<10-35 parts of the fused magnesite of granularity≤8,200 mesh electric-melting magnesiums Below 18-28 parts of sand, 4 parts of crystalline flake graphite, below 0.5-5 parts of 325 mesh aluminium powder, 5 parts of 200 mesh carborundum powder, phenolic resin 0.5- 10 parts, below 10 parts of modified pitch.
2. a kind of ladle low carbon magnesia carbon brick according to claim 1, it is characterised in that described fused magnesite, it is changed Learn component percentage by weight be：MgO >=96.5%, CaO≤1.5%, SiO2≤ 1.2%, Fe2O3≤ 0.6%；Body is close >= 3.45g/㎝3。
3. a kind of ladle low carbon magnesia carbon brick according to claim 1, it is characterised in that described magnesium zircon sand, its chemistry The percentage by weight of component is：MgO >=90.5%, ZrO2>=4.5%, CaO≤1.0%, SiO2≤ 2.0%, Al2O3≤ 0.2%；Body is close >=3.4g/ ㎝3。
4. a kind of ladle low carbon magnesia carbon brick according to claim 1, it is characterised in that the granularity of the crystalline flake graphite is 100 mesh；C weight percent content >=95.0%.
5. a kind of ladle low carbon magnesia carbon brick according to claim 1, it is characterised in that the granularity of the metallic aluminium powder is 325 mesh；Al weight percent content >=99.0%.
6. a kind of ladle low carbon magnesia carbon brick according to claim 1, it is characterised in that the granularity of the carborundum powder is 200 mesh；SiC weight percent content >=97.0%.
7. a kind of ladle low carbon magnesia carbon brick according to claim 1, it is characterised in that the phenolic resin, its chemistry The percentage by weight and index of component be：Solid content >=80%, carbon residue >=46%, free phenol≤10%, moisture≤3.0%；PH Value 6~7.
8. a kind of ladle low carbon magnesia carbon brick according to claim 1, it is characterised in that the index of the modified pitch For：Weight percent content >=71% of carbon residue, weight percent content≤0.1% of ash content.
9. a kind of preparation method of ladle low carbon magnesia carbon brick as claimed in claim 1, it is characterised in that including following step Suddenly：
1) fused magnesite is crushed in jaw crusher, sieved as 0 ＜ granularities≤1mm, 1mm ＜ granularities≤3mm, 3mm ＜ Raw material below degree≤5mm, 5mm ＜ granularities≤8mm, 200 mesh；
By magnesium zircon sand in jaw crusher crush, sieve for 0 ＜ granularities≤1mm, 1mm ＜ granularities≤3mm, 3mm ＜ granularities≤ 5mm, 5mm ＜ granularities≤8mm particulate material；
2) raw material is weighed by above-mentioned parts by weight, closed standby；
3) carborundum powder, aluminium powder, modified pitch are well mixed in dry type vibratory mill, common milling is made；
4) by above-mentioned steps 1) in obtained fused magnesite particle carry out mixing 2~5 minutes with magnesium zircon sand particle, it is disposable slow Add phenolic resin wet mixing 2~3 minutes, add that crystalline flake graphite is mixed 1~2 minute, be eventually adding above-mentioned steps 3) in obtain Discharged after milling is mixed 22~28 minutes altogether；
5) it is molded on brick machine；
6) by the magnesia carbon brick after shaping, heat treatment more than 24 hours is dried, wherein entering kilneye temperature is not higher than 60 DEG C, at this temperature Baking more than 8 hours；110 DEG C are toasted more than 8 hours；150~250 DEG C are toasted more than 8 hours.
CN201710586908.9A 2017-07-18 2017-07-18 A kind of ladle low carbon magnesia carbon brick and preparation method thereof Pending CN107285744A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109503128A (en) * 2018-12-28 2019-03-22 海城利尔麦格西塔材料有限公司 A kind of high intensity converter mouth castable and preparation method
CN111747733A (en) * 2020-06-28 2020-10-09 中科院过程工程研究所南京绿色制造产业创新研究院 Al-MgO-ZrO for top-bottom combined blowing process of steel-making furnace2-C gas supply element and method for producing the same
CN112408948A (en) * 2020-12-04 2021-02-26 北京利尔高温材料股份有限公司 Magnesium carbon brick for smelting low-alkalinity slag
CN112608135A (en) * 2020-12-30 2021-04-06 马鞍山利尔开元新材料有限公司 Low-cost magnesia-zirconia-carbon converter steel-tapping hole brick and preparation method thereof
CN117069480A (en) * 2023-08-15 2023-11-17 大石桥市冠诚耐火材料有限公司 Low-carbon magnesia carbon brick for producing stainless steel by converter and preparation process thereof
CN117362056A (en) * 2023-12-07 2024-01-09 山东海泰高温材料有限公司 Preparation method and application of magnesia carbon brick for steel ladle

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109503128A (en) * 2018-12-28 2019-03-22 海城利尔麦格西塔材料有限公司 A kind of high intensity converter mouth castable and preparation method
CN111747733A (en) * 2020-06-28 2020-10-09 中科院过程工程研究所南京绿色制造产业创新研究院 Al-MgO-ZrO for top-bottom combined blowing process of steel-making furnace2-C gas supply element and method for producing the same
CN112408948A (en) * 2020-12-04 2021-02-26 北京利尔高温材料股份有限公司 Magnesium carbon brick for smelting low-alkalinity slag
CN112608135A (en) * 2020-12-30 2021-04-06 马鞍山利尔开元新材料有限公司 Low-cost magnesia-zirconia-carbon converter steel-tapping hole brick and preparation method thereof
CN117069480A (en) * 2023-08-15 2023-11-17 大石桥市冠诚耐火材料有限公司 Low-carbon magnesia carbon brick for producing stainless steel by converter and preparation process thereof
CN117362056A (en) * 2023-12-07 2024-01-09 山东海泰高温材料有限公司 Preparation method and application of magnesia carbon brick for steel ladle
CN117362056B (en) * 2023-12-07 2024-02-20 山东海泰高温材料有限公司 Preparation method and application of magnesia carbon brick for steel ladle

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Application publication date: 20171024