CN109265144A - A kind of converter body brick and preparation method thereof adding titanium nitride - Google Patents

A kind of converter body brick and preparation method thereof adding titanium nitride Download PDF

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Publication number
CN109265144A
CN109265144A CN201810981921.9A CN201810981921A CN109265144A CN 109265144 A CN109265144 A CN 109265144A CN 201810981921 A CN201810981921 A CN 201810981921A CN 109265144 A CN109265144 A CN 109265144A
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titanium nitride
converter body
parts
body brick
mesh
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CN201810981921.9A
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Inventor
尹斌
王新杰
范玉龙
王志新
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Haicheng Lear Meg Materials Co Ltd Sita
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Haicheng Lear Meg Materials Co Ltd Sita
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Priority to CN201810981921.9A priority Critical patent/CN109265144A/en
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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
    • C04B35/0435—Refractories from grain sized mixtures containing refractory metal compounds other than chromium oxide or chrome ore
    • 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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/44—Refractory linings
    • 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
    • C04B2235/3821—Boron 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
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
    • C04B2235/3886—Refractory metal nitrides, e.g. vanadium nitride, tungsten nitride
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Structural Engineering (AREA)
  • Metallurgy (AREA)
  • Inorganic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The present invention relates to a kind of converter body brick for adding titanium nitride, the physical and chemical indexes of the converter body brick are as follows: MgO >=75.0%, bulk density >=2.98g/cm3 after 200 DEG C of bakings, apparent porosity≤4%, compressive resistance >=35MPa, Linear change rate 0~1.0%；High temperature break resistant intensity MPa >=12；Its component includes: 32~34 parts of fused magnesite particle more than or equal to 3mm less than 5mm by weight；Less than 16~20 parts of fused magnesite particle that 3mm is more than or equal to 1mm, 13~17 parts of fused magnesite particle less than 1mm, 200 10~12 parts of mesh fused magnesite fine powders, 200 mesh are carbonized 1~3 part of boron fine powder, 200 1~3 part of mesh titanium nitride fine powders, 100 10~13 parts of mesh crystalline flake graphites, 2~4 parts of bonding agent phenolic resin.The present invention adds compound additive boron carbide and titanium nitride, improves the inoxidizability of converter body brick, the service life of converter body brick is made to be significantly increased, to improve the steel-making efficiency of steel mill, reduces steel-making cost, guarantees steel-making quality and safety.

Description

A kind of converter body brick and preparation method thereof adding titanium nitride
Technical field
The present invention relates to a kind of refractory material, in particular to a kind of converter body brick for adding titanium nitride and its preparation side Method.
Background technique
Magnesia carbon brick is with high-melting-point alkalinity oxides magnesium (2800 DEG C of fusing point) and to be difficult to be invaded the high-melting-point of profit by clinker Carbon materials add various non-oxidized substance additives as raw material.Carbon composite fire is not burnt with what carbonaceous bonding agent was combined into Material.Magnesia carbon brick as a kind of composite refractory, efficiently utilize magnesia slag corrosion resistance ability is strong and the high thermal conductivity of carbon Property and low expansion, compensate for the disadvantage of magnesia spalling resistance difference.Its main feature has: 1 has good heat-resisting quantity Energy；2 anti-slag abilities are strong；3 good thermal shocks；4 high-temerature creeps are low.Magnesia carbon brick is mainly used for converter, ac arc furnace, direct-current arc The liner of furnace, the positions such as slag line of ladle.
For converter body brick, during steel-making, oxygen decarburization is essential link.The oxidation of carbon is The main reason for it is damaged.The oxidation of carbon will form decarburized layer, and in decarburized layer, institutional framework is loose, and stomata becomes larger, and make slag It is easier to enter inside product with oxygen, further causes product damage.Therefore, antioxidant is added in converter body tile product Product oxidation is prevented to be very important.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of converter body bricks for adding titanium nitride, prevent converter body Brick aoxidizes during steelmaking oxygen blowing, decarburized layer occurs.
To achieve the above object, the present invention is implemented with the following technical solutions:
A kind of converter body brick adding titanium nitride, the physical and chemical index of the converter body brick are as follows: MgO >=75.0%, 200 DEG C dry after bulk density >=2.98g/cm3, apparent porosity≤4%, compressive resistance >=35MPa, Linear change rate 0~1.0%；High temperature Flexural strength MPa >=12；Its component includes: 32~34 parts of fused magnesite particle more than or equal to 3mm less than 5mm by weight； Less than 16~20 parts of fused magnesite particle that 3mm is more than or equal to 1mm；13~17 parts of fused magnesite particle less than 1mm, 200 mesh 10~12 parts of fused magnesite fine powder, 200 mesh are carbonized 1~3 part of boron fine powder, 200 1~3 part of mesh titanium nitride fine powders, 100 mesh scale stones 10~13 parts, 2~4 parts of bonding agent phenolic resin of ink.
The physical and chemical index of the fused magnesite are as follows: MgO >=97.5, CaO≤1.5, SiO2≤ 1.2, Fe2O3≤ 0.6, body Close >=3.45g/ ㎝3。
C >=94.0% in the mass percent of the crystalline flake graphite chemical constituent.
B in the mass percent of the boron carbide chemical constituent4C >=97.0%.
TiN >=98.0% in the mass percent of the titanium nitride chemical constituent.
The phenolic resin index are as follows: solid content >=80%, carbon residue >=46%, free phenol≤10%, moisture≤3.0%, PH value 6~7.
A kind of converter body brick preparation method for adding titanium nitride, the specific steps are as follows:
1) ingredient: raw material is weighed by above-mentioned formula；
2) it is kneaded: opening high speed kolleroang, be first added particulate material dry-mixed 2~5 minutes in ingredient, it is then disposable slow It is added the wet mixing of bonding agent phenolic resin 2~3 minutes, adds 100 mesh crystalline flake graphites and mix 1~2 minute, be eventually adding remaining fine powder Material discharges after being kneaded 20~30 minutes together；
3) form: mixed pug being press-formed by 1100~1200t, quadrangle cloth is abided by when molding, first gently after The principle of weight is operated；
4) be heat-treated: the semi-finished product of compression moulding, which enter in dry kiln, to carry out heat treatment 24 hours or more, into kilneye temperature Must not be higher than 60 DEG C, preheating 8 hours or more, 110 DEG C~120 DEG C baking time 8 hours or more, 200~250 DEG C of baking times 8 Hour or more.
Compared with prior art, the beneficial effects of the present invention are:
1. adding the converter body brick of titanium nitride, main physical and chemical index is as follows: MgO >=75.0%,.Volume after 200 DEG C of bakings Density >=2.98g/cm3, apparent porosity (200 DEG C × for 24 hours)≤4%, compressive resistance (200 DEG C × for 24 hours) and >=35MPa, line variation Rate (1600 DEG C × 3h) 0~1.0%.High temperature break resistant intensity MPa (1400 × 0.5h) >=12.
2. the converter body brick of titanium nitride is added, using the fused magnesite of variable grain gradation as primary raw material, with phenolic aldehyde tree Rouge is bonding agent, by addition compound additive boron carbide and titanium nitride, improves the inoxidizability of converter body brick, makes Converter The service life of body brick is significantly increased, to improve the steel-making efficiency of steel mill, reduces steel-making cost, guarantees steel-making quality and peace Entirely.
3. this product is on probation in certain steel mill's converter, life of converter alreadys exceed 15000 heats, stability in use process Well, it does not find to crack, and steel quality is not influenced.
Specific embodiment
Below with reference to embodiment, the present invention is further described:
The present invention will be described in detail for following embodiment.These embodiments be only to preferred embodiment of the invention into Row description, does not limit the scope of the present invention.
Embodiment
3 kinds of Example formulations following tables；
1 converter body brick preparation method of embodiment, the specific steps are as follows:
1) ingredient: raw material is weighed by upper table formula；
2) kneading: opening high speed kolleroang, is first added particulate material dry-mixed 5 minutes in ingredient, then disposable slowly to add Enter bonding agent phenolic resin wet mixing 3 minutes, adds 100 mesh crystalline flake graphites and mix 2 minutes, be eventually adding remaining fine powder material and mix together White silk discharges after twenty minutes；
3) it forms: mixed pug being press-formed by 1100t, quadrangle cloth is abided by when molding, heavy original after first light Then operated；
4) be heat-treated: the semi-finished product of compression moulding, which enter in dry kiln, carries out heat treatment 24 hours, into 55 DEG C of kilneye temperature, Preheating time 8 hours, 110 DEG C baking time 9 hours, 200 DEG C baking time 10 hours.
2 converter body brick preparation method of embodiment, the specific steps are as follows:
1) ingredient: raw material is weighed by upper table formula；
2) kneading: opening high speed kolleroang, is first added particulate material dry-mixed 3 minutes in ingredient, then disposable slowly to add Enter bonding agent phenolic resin wet mixing 2 minutes, adds 100 mesh crystalline flake graphites and mix 2 minutes, be eventually adding remaining fine powder material and mix together It discharges after practicing 25 minutes；
3) it forms: mixed pug being press-formed by 1200t, quadrangle cloth is abided by when molding, heavy original after first light Then operated；
4) be heat-treated: the semi-finished product of compression moulding, which enter in dry kiln, carries out heat treatment 26 hours, into 58 DEG C of kilneye temperature, Preheating time 8 hours, 120 DEG C baking time 8 hours, 250 DEG C baking time 8 hours.
3 converter body brick preparation method of embodiment, the specific steps are as follows:
1) ingredient: raw material is weighed by upper table formula；
2) kneading: opening high speed kolleroang, is first added particulate material dry-mixed 3 minutes in ingredient, then disposable slowly to add Enter bonding agent phenolic resin wet mixing 3 minutes, adds 100 mesh crystalline flake graphites and mix 2 minutes, be eventually adding remaining fine powder material and mix together It discharges after practicing 25 minutes；
3) it forms: mixed pug being press-formed by 1100t, quadrangle cloth is abided by when molding, heavy original after first light Then operated；
4) be heat-treated: the semi-finished product of compression moulding, which enter in dry kiln, carries out heat treatment 24 hours, into 57 DEG C of kilneye temperature, Preheating time 10 hours, 120 DEG C baking time 10 hours, 250 DEG C baking time 8 hours.
The main physical and chemical index of Examples 1 to 3 is as follows: MgO >=75.0%,.Bulk density >=2.98g/cm after 200 DEG C of bakings3, Apparent porosity (200 DEG C × for 24 hours)≤4%, compressive resistance (200 DEG C × for 24 hours) >=35MPa, Linear change rate (1600 DEG C × 3h) 0~ 1.0%.High temperature break resistant intensity MPa (1400 × 0.5h) >=12.

Claims (7)

1. a kind of converter body brick for adding titanium nitride, which is characterized in that the physical and chemical index of the converter body brick are as follows: MgO >= 75.0%, bulk density >=2.98g/cm3 after 200 DEG C of bakings, apparent porosity≤4%, compressive resistance >=35MPa, Linear change rate 0~ 1.0%；High temperature break resistant intensity MPa >=12；Its component includes: the fused magnesite particle for being more than or equal to 3mm less than 5mm by weight 32~34 parts；Fused magnesite particle 13~17 less than 16~20 parts of fused magnesite particle that 3mm is more than or equal to 1mm, less than 1mm Part, 200 10~12 parts of mesh fused magnesite fine powders, 200 mesh are carbonized 1~3 part of boron fine powder, 200 1~3 part of mesh titanium nitride fine powders, and 100 10~13 parts of mesh crystalline flake graphite, 2~4 parts of bonding agent phenolic resin.
2. a kind of converter body brick for adding titanium nitride according to claim 1, which is characterized in that the fused magnesite Physical and chemical index are as follows: MgO >=97.5, CaO≤1.5, SiO2≤ 1.2, Fe2O3≤ 0.6, body is close >=3.45g/ ㎝3。
3. a kind of converter body brick for adding titanium nitride according to claim 1, which is characterized in that the crystalline flake graphite C >=94.0% in the mass percent of chemical constituent.
4. a kind of converter body brick for adding titanium nitride according to claim 1, which is characterized in that the carbonization boronation Learn B in the mass percent of component4C >=97.0%.
5. a kind of converter body brick for adding titanium nitride according to claim 1, which is characterized in that the nitridation titanizing Learn TiN >=98.0% in the mass percent of component.
6. a kind of converter body brick for adding titanium nitride according to claim 1, which is characterized in that the phenolic resin refers to It is designated as: solid content >=80%, carbon residue >=46%, free phenol≤10%, moisture≤3.0%, pH value 6~7.
7. a kind of converter body brick preparation method for adding titanium nitride according to claim 1, which is characterized in that specific step It is rapid as follows:
1) ingredient: raw material is weighed by above-mentioned formula；
2) it is kneaded: opening high speed kolleroang, be first added particulate material dry-mixed 2~5 minutes in ingredient, be then disposably slowly added to Bonding agent phenolic resin wet mixing 2~3 minutes adds 100 mesh crystalline flake graphites and mixes 1~2 minute, is eventually adding remaining fine powder material one It rises and discharges after being kneaded 20~30 minutes；
3) it forms: mixed pug being press-formed by 1100~1200t, quadrangle cloth is abided by when molding, it is heavy after first light Principle is operated；
4) be heat-treated: the semi-finished product of compression moulding, which enter in dry kiln, to carry out heat treatment 24 hours or more, must not into kilneye temperature Higher than 60 DEG C, preheating 8 hours or more, 110 DEG C~120 DEG C baking time 8 hours or more, 200~250 DEG C baking time 8 hours More than.
CN201810981921.9A 2018-08-27 2018-08-27 A kind of converter body brick and preparation method thereof adding titanium nitride Pending CN109265144A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114180941A (en) * 2022-02-15 2022-03-15 北京利尔高温材料股份有限公司 Oxidation-resistant low-carbon magnesia carbon brick and preparation method thereof
CN116199500A (en) * 2022-12-20 2023-06-02 鞍山钢铁冶金炉材科技有限公司 High-performance magnesia carbon brick for converter trunnion and slag line position and production process thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107311626A (en) * 2017-07-18 2017-11-03 海城市中兴高档镁质砖有限公司 A kind of magnesia carbon brick for adding aluminium nitride and preparation method thereof
CN107954697A (en) * 2017-11-22 2018-04-24 海城利尔麦格西塔材料有限公司 A kind of magnesia carbon brick for adding boron carbide and preparation method thereof
CN108383505A (en) * 2018-03-12 2018-08-10 海城利尔麦格西塔材料有限公司 A kind of magnesia carbon brick and its production method containing titanium carbide
CN108383504A (en) * 2018-03-12 2018-08-10 海城利尔麦格西塔材料有限公司 A kind of coverter pig magnesia carbon brick and preparation method thereof
CN108440001A (en) * 2018-03-12 2018-08-24 海城利尔麦格西塔材料有限公司 A kind of the converter body brick and its production method of addition titanium nitride

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107311626A (en) * 2017-07-18 2017-11-03 海城市中兴高档镁质砖有限公司 A kind of magnesia carbon brick for adding aluminium nitride and preparation method thereof
CN107954697A (en) * 2017-11-22 2018-04-24 海城利尔麦格西塔材料有限公司 A kind of magnesia carbon brick for adding boron carbide and preparation method thereof
CN108383505A (en) * 2018-03-12 2018-08-10 海城利尔麦格西塔材料有限公司 A kind of magnesia carbon brick and its production method containing titanium carbide
CN108383504A (en) * 2018-03-12 2018-08-10 海城利尔麦格西塔材料有限公司 A kind of coverter pig magnesia carbon brick and preparation method thereof
CN108440001A (en) * 2018-03-12 2018-08-24 海城利尔麦格西塔材料有限公司 A kind of the converter body brick and its production method of addition titanium nitride

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114180941A (en) * 2022-02-15 2022-03-15 北京利尔高温材料股份有限公司 Oxidation-resistant low-carbon magnesia carbon brick and preparation method thereof
CN116199500A (en) * 2022-12-20 2023-06-02 鞍山钢铁冶金炉材科技有限公司 High-performance magnesia carbon brick for converter trunnion and slag line position and production process thereof
CN116199500B (en) * 2022-12-20 2024-04-05 鞍山钢铁冶金炉材科技有限公司 High-performance magnesia carbon brick for converter trunnion and slag line position and production process thereof

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Application publication date: 20190125