CN106977181A - A kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick and preparation method thereof - Google Patents
A kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick and preparation method thereof Download PDFInfo
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C04B2235/3231—Refractory metal oxides, their mixed metal oxides, or oxide-forming salts thereof
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Abstract
The present invention relates to technical field of refractory materials, more particularly to a kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick and preparation method thereof.A kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick, includes the raw material of following parts by weight：20~60 parts of titanium calcium aluminate waste particle；96 10~80 parts of highly-purity magnesite particles；It is milled 25~40 parts altogether；2~4 parts of bonding agent.Add and kneaded in high speed kolleroang after each raw material is mixed by proportioning, it is compressing in addition punching block after mixing to obtain adobe, produce BOF Hood magnesium-aluminum-calcium titanium carbon brick finally by heat treatment.Titanium calcium aluminate waste particle that the present invention is matched somebody with somebody using variable grain level, 96 highly-purity magnesite particles is primary raw materials, using bonding agent, by addition milling altogether, good thermal shock stability, resistance to mechanical is made and impacts strong BOF Hood magnesium-aluminum-calcium titanium carbon brick.The present invention has excellent thermal shock resistance, outstanding impact resistance and good corrosion resistance；Cost is low, environmental pollution is small, economic and environment-friendly.
Description
Technical field
The present invention relates to technical field of refractory materials, more particularly to a kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick and its preparation
Method.
Background technology
With developing rapidly for steel and iron industry, converter has efficiency high, and rhythm of production is fast, and raw material adaptability waits well special
Point, has been the industrial furnaces of steel-making that current steel-making enterprise is extremely praised highly.Converter is responsible for the dephosphorization of molten steel, and decarburization etc. is complicated to appoint
Business.BOF Hood is the important component of converter, and slag cryogenic nitrogen is splashed in high-temperature gas impact and tapping when being not only subjected to smelting
The thermal shock repeatedly that cold air is caused when gas and tapping, and to carry the mechanical shock that the cleaning a large amount of dry slags of fire door are caused.Furnace crown
Refractory material will have excellent thermal shock resistance, outstanding impact resistance and good erosion resisting.
Converter current furnace crown is generally made using magnesia carbon brick, and magnesia carbon brick thermal shock resistance is poor, resistance to mechanical impacts poor, raw material
Price is high, environmental pollution is serious.Because magnesia carbon brick thermal shock resistance is poor, resistance to mechanical impact is poor, Converter labour later stage furnace crown portion
Position needs substantial amounts of manpower and materials to safeguard, influences the efficiency and cost of converter.
The content of the invention
To overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick and its system
Preparation Method.Good thermal shock stability of the present invention, resistance to mechanical impact is strong, the cost of raw material is low, environmental pollution is small.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick, includes the raw material of following parts by weight：
20~60 parts of titanium calcium aluminate waste particle；
96 10~80 parts of highly-purity magnesite particles；
It is milled 25~40 parts altogether；
2~4 parts of bonding agent；
It is described it is common milling for 96 electric smelting fine powders, Brown Alundum fine powder, electric smelting spinelle fine powder, alumina powder, metallic aluminium powder,
One or more in metallic silicon power, boron carbide micro powder, silicon carbide micro-powder, graphite, hard pitch, methenamine.
The titanium calcium aluminate waste particle, its AL2O3Weight/mass percentage composition is that 73~78%, CaO weight/mass percentage compositions are 8
~12%, TiO2Weight/mass percentage composition be 8~12%, bulk density >=3.33g/cm3；By the variable grain of following parts by weight
The titanium calcium aluminate waste particle of rank is mixed：0~30 part of 1~3mm titanium calcium aluminate waste particle, 40~60 parts of 3~5mm
Titanium calcium aluminate waste particle.
Described its MgO weight/mass percentage composition of 96 highly-purity magnesite particle is 95~96%, SiO2Weight/mass percentage composition≤5%,
Bulk density >=3.33g/cm3；Mixed by 96 highly-purity magnesite particles of the variable grain rank of following parts by weight：15~25
0~1mm of part 96 highly-purity magnesite particles, 35~50 parts of 1~3mm 96 highly-purity magnesite particles, the 96 of 40~80 parts of 3~5mm are high
Pure magnesia particle.
The common milling includes the 96 electric smelting fine powders, the hard pitch powder of 1~2 parts by weight, 1~3 weight of 2~4 parts by weight
The graphite, the metallic silicon power of 0.1~1.5 parts by weight, the silicon carbide micro-powder of 0.1~1.5 parts by weight, the gold of 0.1~1 parts by weight of part
Belong to aluminium powder, the methenamine of 0.1~1 parts by weight.
Described its MgO weight/mass percentage composition >=95%, SiO of 96 electric smelting fine powder2Weight/mass percentage composition≤3.4%, volume is close
Degree >=3.30g/cm3；The granularity of the 96 electric smelting fine powder is 180~200 mesh.
The granularity of the graphite is 80~100 mesh, weight/mass percentage composition >=95.0% of solid content, the quality percentage of ash
Content≤4.5%, weight/mass percentage composition≤1.2% of fugitive constituent, weight/mass percentage composition≤0.05% of moisture content.
The granularity of the metallic aluminium powder is 300~320 mesh, AL weight/mass percentage composition >=99.9%.
The granularity of the silicon carbide micro-powder is 3 μ -5 μ, SiC weight/mass percentage composition >=99.0%.
A kind of BOF Hood preparation method of magnesium-aluminum-calcium titanium carbon brick, specifically includes following steps：
(1) by aggregate is broken, screening, fine grinding：By titanium calcium aluminate waste particle is broken, screening, fine grinding, separate 1~3mm, 3
The titanium calcium aluminate waste particle of~5mm two kinds of particles ranks；By 96 highly-purity magnesite Particle Breakages, screening, fine grinding, separate 0~
1mm, 1~3mm, the other 96 highly-purity magnesite particle of 3~5mm, tri- kinds of granular-grades；
(2) dispensing：Raw material is weighed by above-mentioned formula；
(3) knead：Mixing facilities are high speed kolleroang, and granulated aggregate is first added after start and is kneaded 2~5 minutes, Ran Houyi
Secondary property is slowly added to bonding agent wet mixing 2~3 minutes, adds crystalline flake graphite and mixes 1~2 minute, until flying without substantial amounts of graphite
Raise, be eventually adding all millings altogether and discharged after 20~30 minutes；
(4) it is molded：Semi-finished product are molded on 1000 tons of brick machines, and press requires outer brick output, vacuum-pumping type, and forming operation will
Ask and take off material in accordance with corner, the principle of first light rear weight is operated；
(5) it is heat-treated：It is heat-treated, enters kilneye temperature less than 60 DEG C, 200 DEG C of baking times are more than 8 hours.
Compared with prior art, the beneficial effects of the invention are as follows：
The titanium calcium aluminate waste particle of the invention matched somebody with somebody using variable grain level, 96 highly-purity magnesite particles are used as primary raw material
Environmentally friendly bonding agent, is milled altogether by addition, and good thermal shock stability, resistance to mechanical is made and impacts strong BOF Hood magnesium-aluminum-calcium titanium carbon
Brick.Cost of the present invention is low, environmental pollution is small, economic and environment-friendly.
Embodiment
The embodiment to the present invention is described further below, but is not limited to the scope of the present invention：
It is exemplified below three embodiments to illustrate as to the specific embodiment of the invention is raw materials used, particular content
As shown in table 1.
Table 1：Embodiment 1, embodiment 2, a kind of list of ingredients (unit of the BOF Hood of embodiment 3 magnesium-aluminum-calcium titanium carbon brick：Weight
Measure percentage composition %)
A kind of BOF Hood preparation method of magnesium-aluminum-calcium titanium carbon brick of the present invention, specifically includes following steps：
(1) by aggregate is broken, screening, fine grinding：By titanium calcium aluminate waste particle is broken, screening, fine grinding, separate 1~3mm, 3
The titanium calcium aluminate waste particle of~5mm two kinds of particles ranks；By 96 highly-purity magnesite Particle Breakages, screening, fine grinding, separate 0~
1mm, 1~3mm, the other 96 highly-purity magnesite particle of 3~5mm, tri- kinds of granular-grades；
(2) dispensing：Formula weighs raw material as described in table 1；
(3) knead：Mixing facilities are high speed kolleroang, and granulated aggregate is first added after start and is kneaded 2~5 minutes, Ran Houyi
Secondary property is slowly added to bonding agent wet mixing 2~3 minutes, adds crystalline flake graphite and mixes 1~2 minute, until flying without substantial amounts of graphite
Raise, be eventually adding all millings altogether and discharged after 20~30 minutes；
(4) it is molded：Semi-finished product are molded on 1000 tons of brick machines, and press requires outer brick output, vacuum-pumping type, and forming operation will
Ask and take off material in accordance with corner, the principle of first light rear weight is operated；
(5) it is heat-treated：It is heat-treated, enters kilneye temperature less than 60 DEG C, 200 DEG C of baking times are more than 8 hours.
Traditional converter cap brick thermal shock resistance is poor, resistance to mechanical impact is poor, the prices of raw materials are high, environmental pollution is serious.
In order to make up the deficiency of traditional converter cap brick, Haicheng Zhongxing High-Grade Magnesia Brick Co., Ltd. has researched and developed a kind of Converter
Cap magnesium-aluminum-calcium titanium carbon brick.Magnesia carbon brick thermal shock resistance, impact resistance are poor by force, the thermal shock resistance that the introducing of aluminium can reach
And anti-mechanical shock resistance, but the price of raw material high grade bauxite, Brown Alundum, white fused alumina is above 3500 yuan/ton, in order to save
Cost, the invention using variable grain level match somebody with somebody titanium calcium aluminate waste particle, 96 highly-purity magnesite particles as primary raw material,
Using environmentally friendly bonding agent, it is milled altogether by addition, good thermal shock stability, resistance to mechanical is made and impacts strong BOF Hood magnesium-aluminum-calcium
Titanium carbon brick.Cost of the present invention is low, environmental pollution is small, with reduction cost of material, the reduction wasting of resources, weakens environmental pollution
Significance.
The main physical and chemical index of magnesium-aluminum-calcium titanium carbon brick of the present invention is as follows：MgO >=35%, Al2O3>=40%, CaO >=
5%, TiO2>=5%, C >=10%.Bulk density >=3.05g/cm after 200 DEG C of bakings3, apparent porosity (200 DEG C × 24h)≤5%,
Compressive resistance (200 DEG C × 24h) >=50MPa, Linear change rate (1600 DEG C × 3h) 0~0.5%.Good thermal shock stability of the present invention,
Resistance to mechanical impact is strong.This product of the present invention is tried out by 100 tons of converters, and the furnace crown brick life-span is better than conventional furnace crown brick, and the later stage need not
Safeguard, service life >=10000 time.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto,
Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its
Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.
Claims (9)
1. a kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick, it is characterised in that include the raw material of following parts by weight：
20~60 parts of titanium calcium aluminate waste particle；
96 10~80 parts of highly-purity magnesite particles；
It is milled 25~40 parts altogether；
2~4 parts of bonding agent；
The common milling is 96 electric smelting fine powders, Brown Alundum fine powder, electric smelting spinelle fine powder, alumina powder, metallic aluminium powder, metal
One or more in silica flour, boron carbide micro powder, silicon carbide micro-powder, graphite, hard pitch, methenamine.
2. a kind of BOF Hood according to claim 1 magnesium-aluminum-calcium titanium carbon brick, it is characterised in that the titanium calcium aluminate gives up
Solid impurity particle, its AL2O3Weight/mass percentage composition is that 73~78%, CaO weight/mass percentage compositions are 8~12%, TiO2Quality percentage contain
Measure as 8~12%, bulk density >=3.33g/cm3；By the titanium calcium aluminate waste particle of the variable grain rank of following parts by weight
Mix：0~30 part of 1~3mm titanium calcium aluminate waste particle, 40~60 parts of 3~5mm titanium calcium aluminate waste particle.
3. a kind of BOF Hood according to claim 1 magnesium-aluminum-calcium titanium carbon brick, it is characterised in that 96 highly-purity magnesite
Its MgO weight/mass percentage composition of particle is 95~96%, SiO2Weight/mass percentage composition≤5%, bulk density >=3.33g/cm3；By with
96 highly-purity magnesite particles of the variable grain rank of lower parts by weight are mixed：15~25 parts of 0~1mm 96 highly-purity magnesites
Grain, 35~50 parts of 1~3mm 96 highly-purity magnesite particles, 40~80 parts of 3~5mm 96 highly-purity magnesite particles.
4. a kind of BOF Hood according to claim 1 magnesium-aluminum-calcium titanium carbon brick, it is characterised in that the common milling includes
96 electric smelting fine powders of 2~4 parts by weight, the hard pitch powder of 1~2 parts by weight, the graphite of 1~3 parts by weight, 0.1~1.5 parts by weight
Metallic silicon power, the silicon carbide micro-powder of 0.1~1.5 parts by weight, the metallic aluminium powder of 0.1~1 parts by weight, the crow of 0.1~1 parts by weight
Lip river tropine.
5. a kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick according to claim 1 or 4, it is characterised in that 96 electric smelting
Its MgO weight/mass percentage composition >=95%, SiO of fine powder2Weight/mass percentage composition≤3.4%, bulk density >=3.30g/cm3；Described 96
The granularity of electric smelting fine powder is 180~200 mesh.
6. a kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick according to claim 1 or 4, it is characterised in that the graphite
Granularity is 80~100 mesh, weight/mass percentage composition >=95.0% of solid content, weight/mass percentage composition≤4.5% of ash, fugitive constituent
Weight/mass percentage composition≤1.2%, weight/mass percentage composition≤0.05% of moisture content.
7. a kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick according to claim 1 or 4, it is characterised in that the metallic aluminium
The granularity of powder is 300~320 mesh, AL weight/mass percentage composition >=99.9%.
8. a kind of BOF Hood magnesium-aluminum-calcium titanium carbon brick according to claim 1 or 4, it is characterised in that the carborundum
The granularity of micro mist is 3 μ -5 μ, SiC weight/mass percentage composition >=99.0%.
9. a kind of preparation method of BOF Hood according to claim 1 magnesium-aluminum-calcium titanium carbon brick, it is characterised in that specific
Comprise the following steps：
(1) by aggregate is broken, screening, fine grinding：By titanium calcium aluminate waste particle is broken, screening, fine grinding, separate 1~3mm, 3~
The titanium calcium aluminate waste particle of 5mm two kinds of particles ranks；By 96 highly-purity magnesite Particle Breakages, screening, fine grinding, 0~1mm, 1 are separated
~3mm, the other 96 highly-purity magnesite particle of 3~5mm, tri- kinds of granular-grades；
(2) dispensing：Formula weighs raw material as described in claim 1-8；
(3) knead：Mixing facilities are high speed kolleroang, granulated aggregate mixing 2~5 minutes are first added after start, then disposably
It is slowly added to bonding agent wet mixing 2~3 minutes, adds crystalline flake graphite and mix 1~2 minute, until is flown upward without substantial amounts of graphite, most
After add it is all altogether be milled 20~30 minutes after discharge；
(4) it is molded：Semi-finished product are molded on 1000 tons of brick machines, and press requires outer brick output, vacuum-pumping type, and forming operation requirement is abided by
Keep corner and take off material, the principle of first light rear weight is operated；
(5) it is heat-treated：It is heat-treated, enters kilneye temperature less than 60 DEG C, 200 DEG C of baking times are more than 8 hours.
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|---|---|---|---|---|
| CN111205098A (en) * | 2020-01-14 | 2020-05-29 | 辽宁欣立耐火材料科技集团有限公司 | High-aluminum ladle wall brick for steel ladle and preparation method thereof |
| CN111499357A (en) * | 2020-04-23 | 2020-08-07 | 北京利尔高温材料股份有限公司 | Unfired magnesia-alumina-carbon brick added with ferrovanadium slag and used for ladle wall and preparation method thereof |
| CN111499357B (en) * | 2020-04-23 | 2022-04-22 | 北京利尔高温材料股份有限公司 | Unfired magnesia-alumina-carbon brick added with ferrovanadium slag and used for ladle wall and preparation method thereof |
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Address after: 114206 Liaoning City, Anshan Province, Haicheng City, the town of Wang Village, the village of eight Applicant after: Haicheng Lear MEG Materials Co. Ltd. Sita Address before: 114206 Wangjia village, eight Li Town, Haicheng City, Liaoning Province, Anshan, Liaoning Applicant before: Haicheng Zhongxing High-Grade Magnesia Brick Co., Ltd. |
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Application publication date: 20170725 |