CN109553397A - A kind of converter fettling big fabric and preparation method thereof - Google Patents
A kind of converter fettling big fabric and preparation method thereof Download PDFInfo
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- CN109553397A CN109553397A CN201811623852.0A CN201811623852A CN109553397A CN 109553397 A CN109553397 A CN 109553397A CN 201811623852 A CN201811623852 A CN 201811623852A CN 109553397 A CN109553397 A CN 109553397A
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- magnesia
- partial size
- speed rail
- converter
- magnesium carbon
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- 239000004744 fabric Substances 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000004519 manufacturing process Methods 0.000 title abstract description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 106
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 59
- RWDBMHZWXLUGIB-UHFFFAOYSA-N [C].[Mg] Chemical group [C].[Mg] RWDBMHZWXLUGIB-UHFFFAOYSA-N 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 35
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 25
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 24
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 12
- 239000004411 aluminium Substances 0.000 claims abstract description 12
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000011300 coal pitch Substances 0.000 claims abstract description 12
- 229910052742 iron Inorganic materials 0.000 claims abstract description 12
- 239000000843 powder Substances 0.000 claims abstract description 12
- 230000036961 partial effect Effects 0.000 claims description 56
- 239000002210 silicon-based material Substances 0.000 claims description 16
- 238000003763 carbonization Methods 0.000 claims description 15
- 229910052799 carbon Inorganic materials 0.000 claims description 14
- 239000011449 brick Substances 0.000 claims description 12
- 239000003575 carbonaceous material Substances 0.000 claims description 9
- 230000001172 regenerating effect Effects 0.000 claims description 9
- 239000003595 mist Substances 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 230000008929 regeneration Effects 0.000 claims description 5
- 238000011069 regeneration method Methods 0.000 claims description 5
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 19
- 238000005245 sintering Methods 0.000 abstract description 11
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000853 adhesive Substances 0.000 abstract description 4
- 230000001070 adhesive effect Effects 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007423 decrease Effects 0.000 abstract description 4
- 238000011049 filling Methods 0.000 abstract description 4
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 4
- 239000011707 mineral Substances 0.000 abstract description 4
- 230000002411 adverse Effects 0.000 abstract description 3
- 238000010276 construction Methods 0.000 abstract description 3
- 239000011819 refractory material Substances 0.000 abstract description 3
- 238000005272 metallurgy Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 3
- 229910003978 SiClx Inorganic materials 0.000 description 3
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004523 agglutinating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052681 coesite Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052906 cristobalite Inorganic materials 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229910052839 forsterite Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- HCWCAKKEBCNQJP-UHFFFAOYSA-N magnesium orthosilicate Chemical compound [Mg+2].[Mg+2].[O-][Si]([O-])([O-])[O-] HCWCAKKEBCNQJP-UHFFFAOYSA-N 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000505 pernicious effect Effects 0.000 description 1
- 230000033764 rhythmic process Effects 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 229910052682 stishovite Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229910052905 tridymite Inorganic materials 0.000 description 1
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
- 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
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- 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
- C04B35/62204—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products using waste materials or refuse
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- 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
- C04B2235/3232—Titanium oxides or titanates, e.g. rutile or anatase
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- 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
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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- 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
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- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
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- C04B2235/402—Aluminium
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- C04B35/71—Ceramic products containing macroscopic reinforcing agents
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- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The present invention relates to field of metallurgy and converter repairing Material Field more particularly to a kind of converter fettling big fabric and preparation method thereof.Composed of the following components and each component mass percent are as follows: secondary magnesium carbon: 25wt%；High-speed rail magnesia: 30wt%；Silicon carbide: 25wt%；Medium temperature coal pitch: 10wt%；Aluminium powder: 2wt%；Iron scale: 4wt%；SD80:3wt%；Caprolactam: 3wt%.The big application of dress material of the converter fettling of formula production is to have the advantages that adhesive rate is high, resistance to flaking is good, sintering velocity is fast, resistant to corrosion, antiscour, high-temperature expansion are small, and adherence rate reaches 97% or more on converter installation.Magnesia raw material rich in mineral resources, auxiliary material output can get, and formula is simple, reduces the inventory cost of raw material, the high-adhesiveness of product not only realizes the decline of production cost, and reduces adverse effect of the residue to molten steel.Meanwhile construction speed is accelerated, the filling time is shortened, kiln service life is extended, reduces the consumption of refractory material.
Description
Technical field
The present invention relates to field of metallurgy and converter repairing Material Field more particularly to a kind of big fabric of converter fettling and its
Preparation method.
Background technique
Pneumatic steelmaking equipment because work, and loss is very serious under high temperature environment for a long time, so needing using
It is lost part using mending material after a period of time to repair, with the needs for maintaining pneumatic steelmaking to work normally.Converter is big
Face sintering material for repairing is a kind of important materials for improving life of converter, and it is unapproachable that big face sintering material for repairing can make up material spray
Durability is suitable for loading side furnace wall, furnace bottom, tapping wing furnace wall, furnace crown inflection point etc., and the combination of the more obvious material for repairing of effect is light
Degree directly affects the impact resistance of furnace retaining effect and big face, sintering time then directly affects rhythm of production, this two indexs are such as
It controls and bad directly affects converter yield.It improves converter smelting efficiency and reduces refractory consumption rate important in inhibiting, by
Most attention both domestic and external.
Currently, the product category of the big fabric of converter fettling is various, although all having certain repair efficiency, it is used
The performances such as time, the cost of raw material and agglutinating property have many deficiencies, are in particular in: 1, sintering time is long: now making steel
The big fabric of the fettling used generally once launches 0.8~1.5 ton, and sintering time needs 80~100 minutes, seriously affects production and wants
It asks；2, used material needs to consume a large amount of mineral resources based on magnesia and forsterite, is not only unfavorable for environmental protection, and
Cost is very high, is unfavorable for the popularization and application of big fabric；3, service life is short: a fettling service life is about 10 hours.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of converter fettling big fabric and preparation method thereof.This
Inventive structure is simple, reduces cost of material, realizes in fettling Fast Sintering, reduces working strength, improves a fettling and uses
Service life.
A kind of big fabric of converter fettling, composed of the following components and each component mass percent are as follows: secondary magnesium carbon:
25wt%；High-speed rail magnesia: 30wt%；Silicon carbide: 25wt%；Medium temperature coal pitch: 10wt%；Aluminium powder: 2wt%；Iron scale: 4wt%；
SD80:3wt%；Caprolactam: 3wt%.
In secondary magnesium carbon, partial size is the regenerative magnesia-carbon brick material of 0.3~1mm: 15wt%；Partial size is the regeneration of 0.088mm
Magnesia carbon brick material: 10wt%.
In high-speed rail magnesia, partial size is the high-speed rail magnesia of 1~3mm: 14wt%；Partial size is the high-speed rail magnesia of 0.3~1mm:
16wt%.
In silicon carbide, partial size is the carbonization silicon material of 1~3mm: 10wt%；Partial size is the carbonization silicon material of 0.3~1mm:
15wt%.
Ti in the high-speed rail magnesia2O3The content of+MgO is 92% or more.
A kind of converter fettling preparation method of big fabric, specifically comprises the following steps:
A) it carries out secondary magnesium carbon, silicon carbide, high-speed rail magnesia to be broken into bulky grain with jaw crusher respectively；
B) secondary magnesium carbon, silicon carbide, high-speed rail magnesia are broken into the micro mist of 0.3~1mm respectively with kibbler roll；
C) partial regeneration magnesium carbon material micro mist is finely ground into partial size with ball mill is that 0.088mm seals magnesium micropowder again；
D) medium temperature coal pitch is weighed: 10wt%；Aluminium powder: 2wt%；Iron scale: 4wt%；SD80:3wt%；Caprolactam:
3wt%；It pours into blender stirring to be pre-mixed for 30 minutes, is then sent to hybrid system；
E) it is sieved by partial size difference, taking partial size is the secondary magnesium carbon material of 0.3~1mm: 15wt%；Partial size is
The secondary magnesium carbon material of 0.088mm: 10wt%；Partial size is the high-speed rail magnesia of 1~3mm: 14wt%；Partial size is the high-speed rail of 0.3~1mm
Magnesia: 16wt%；Partial size is the carbonization silicon material of 1~3mm: 10wt%；Partial size is the carbonization silicon material of 0.3~1mm: 15wt%；It will
Above-mentioned raw materials are put into mixing system tank, and mixing was delivered to hybrid system after 6~8 minutes；
F) above-mentioned material stirs to 5 in hybrid system~it is dispensed to obtain big fabric finished product after ten minutes.
Compared with prior art, the beneficial effects of the present invention are:
The present invention uses secondary magnesium carbon, high-speed rail magnesia and silicon carbide for primary raw material, by secondary magnesium carbon, high-speed rail magnesia and carbon
It is sieved after SiClx is broken, medium temperature coal pitch, aluminium powder, iron scale, SD80, caprolactam is added by obtained, the formula is sufficiently stirred
The big application of dress material of the converter fettling of production is with adhesive rate is high, resistance to flaking is good, sintering velocity is fast, resistance on converter installation
The small advantage of erosion, antiscour, high-temperature expansion, and adherence rate reaches 97% or more.Magnesia raw material rich in mineral resources, auxiliary
Raw material output can get, and formula is simple, reduce the inventory cost of raw material, the high-adhesiveness of product, which not only realizes, to be produced into
This decline, and reduce adverse effect of the residue to molten steel.Meanwhile reducing working strength, construction speed is accelerated,
The filling time is shortened, kiln service life is extended, reduces the consumption of refractory material.
Specific embodiment
Embodiment is implemented under the premise of the technical scheme 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.
Embodiment 1:
A kind of big fabric of converter fettling, composed of the following components and each component mass percent are as follows: secondary magnesium carbon:
25wt%；High-speed rail magnesia: 30wt%；Silicon carbide: 25wt%；Medium temperature coal pitch: 10wt%；Aluminium powder: 2wt%；Iron scale: 4wt%；
SD80:3wt%；Caprolactam: 3wt%.
In secondary magnesium carbon, partial size is the regenerative magnesia-carbon brick material of 0.8mm: 15wt%；Partial size is the secondary magnesium carbon of 0.088mm
The material of brick: 10wt%.
In high-speed rail magnesia, partial size is the high-speed rail magnesia of 2mm: 14wt%；Partial size is the high-speed rail magnesia of 0.8mm: 16wt%.
In silicon carbide, partial size is the carbonization silicon material of 2mm: 10wt%；Partial size is the carbonization silicon material of 0.7mm: 15wt%.
Ti in the high-speed rail magnesia2O3The content of+MgO is 93%.
It uses secondary magnesium carbon, high-speed rail magnesia and silicon carbide for primary raw material, secondary magnesium carbon, silicon carbide and high-speed rail magnesia is broken
Screening after broken, addition medium temperature coal pitch, aluminium powder, iron scale, SD80, caprolactam are obtained by being sufficiently stirred, formula production
The big application of dress material of converter fettling be on converter installation with adhesive rate is high, resistance to flaking is good, sintering velocity is fast, resistant to corrosion,
The small advantage of antiscour, high-temperature expansion.Currently, fettling additional amount of similar product is in 800kg -1500kg etc. in the market；
Sintering time is generally at 90 minutes or more, and filling time of longest is 10 hours or more, and product of the present invention utilizes high-speed rail magnesia
High-intensitive with high-compactness, high corrosion-resistant is the ideal sorting for producing EAF bottom ramming mass and ripe material for repairing, utilizes carbon
The thermal conductivity of SiClx is very high, about the 2 of silicon nitride times；Its coefficient of expansion is the half of aluminum oxide；Bending strength is close
Silicon nitride material, nitrogen fracture toughness are smaller than silicon nitride.Not soluble in water and general acid.Its chemistry is that stability is good, has chemistry
Inertia.It is not reacted with the nitration mixture of hydrofluoric acid, nitric acid；It has excellent high temperature strength and high temperature creep-resisting ability, hot pressing silicon carbide
Material is essentially identical in 1600 DEG C of high-temperature bending strength and room temperature；Using secondary magnesium carbon material have excellent resistance to slag corrosion,
The ability of slag penetration, thermal shock resistance and thermal conductivity；Product is in elder brother's steel, water steel, the steel mills open hearth, electric furnace to converter such as climb steel
Upper progress fettling experiment, a fettling averagely use the time 30 hours or more.Refractory raw material it is limited, by refractory raw material raw material
Being changed into refractory raw material clinker need could generally obtain by mine locating, classification exploitation, exercise or the processes such as melting, broken, need
A large amount of manpower, finance and material resources are expended, using secondary magnesium carbon material and silicon carbide as primary raw material, realize the reasonable of resource
Using, recycle, reduce discharge.The decline of production cost is not only realized, and reduces residue to the bad of molten steel
It influences.Toxic, pernicious gas, energy conservation and environmental protection are not generated when product use.
A kind of converter fettling preparation method of big fabric, specifically comprises the following steps:
A) it carries out secondary magnesium carbon, silicon carbide, high-speed rail magnesia to be broken into bulky grain with jaw crusher respectively；
B) secondary magnesium carbon, silicon carbide, high-speed rail magnesia are broken into the micro mist of 0.3~1mm respectively with kibbler roll；
C) partial regeneration magnesium carbon material micro mist is finely ground into partial size with ball mill is that 0.088mm seals magnesium micropowder again；
D) medium temperature coal pitch is weighed: 10wt%；Aluminium powder: 2wt%；Iron scale: 4wt%；SD80:3wt%；Caprolactam:
3wt%；It pours into blender stirring to be pre-mixed for 30 minutes, is then sent to hybrid system；
E) it is sieved by partial size difference, in secondary magnesium carbon, partial size is the regenerative magnesia-carbon brick material of 0.8mm: 15wt%；Grain
Diameter is the regenerative magnesia-carbon brick material of 0.088mm: 10wt%.In high-speed rail magnesia, partial size is the high-speed rail magnesia of 2mm: 14wt%；Partial size
For the high-speed rail magnesia of 0.8mm: 16wt%.In silicon carbide, partial size is the carbonization silicon material of 2mm: 10wt%；Partial size is 0.7mm's
Be carbonized silicon material: 15wt%.Ti in the high-speed rail magnesia2O 3The content of+MgO is 93%.Above-mentioned raw materials are put into mixing system tank
In, mixing was delivered to hybrid system after 6~8 minutes；
F) above-mentioned material stirs to 5 in hybrid system~it is dispensed to obtain big fabric finished product after ten minutes.
The big fabric produced using the formula and method 110 DEG C of * for 24 hours under the conditions of, each parameter value are as follows: MgO >=55%,
C >=8%, SiC < 6%, SiO2 < 8%, bulk density >=2.0/cm3, product refractoriness >=1730 DEG C.
Embodiment 2:
A kind of big fabric of converter fettling, composed of the following components and each component mass percent are as follows: secondary magnesium carbon:
25wt%；High-speed rail magnesia: 30wt%；Silicon carbide: 25wt%；Medium temperature coal pitch: 10wt%；Aluminium powder: 2wt%；Iron scale: 4wt%；
SD80:3wt%；Caprolactam: 3wt%.
In secondary magnesium carbon, partial size is the regenerative magnesia-carbon brick material of 0.5mm: 15wt%；Partial size is the secondary magnesium carbon of 0.088mm
The material of brick: 10wt%.
In high-speed rail magnesia, partial size is the high-speed rail magnesia of 1mm: 14wt%；Partial size is the high-speed rail magnesia of 0.3mm: 16wt%.
In silicon carbide, partial size is the carbonization silicon material of 1mm: 10wt%；Partial size is the carbonization silicon material of 0.3mm: 15wt%.
Ti in the high-speed rail magnesia2O3The content of+MgO is 92%.
Embodiment 3:
A kind of big fabric of converter fettling, composed of the following components and each component mass percent are as follows: secondary magnesium carbon:
25wt%；High-speed rail magnesia: 30wt%；Silicon carbide: 25wt%；Medium temperature coal pitch: 10wt%；Aluminium powder: 2wt%；Iron scale: 4wt%；
SD80:3wt%；Caprolactam: 3wt%.
In secondary magnesium carbon, partial size is the regenerative magnesia-carbon brick material of 1mm: 15wt%；Partial size is the regenerative magnesia-carbon brick of 0.088mm
Material: 10wt%.
In high-speed rail magnesia, partial size is the high-speed rail magnesia of 3mm: 14wt%；Partial size is the high-speed rail magnesia of 1mm: 16wt%.
In silicon carbide, partial size is the carbonization silicon material of 3mm: 10wt%；Partial size is the carbonization silicon material of 1mm: 15wt%.
Ti in the high-speed rail magnesia2O3The content of+MgO is 92% or more.
The present invention uses secondary magnesium carbon, high-speed rail magnesia and silicon carbide for primary raw material, by secondary magnesium carbon, high-speed rail magnesia and carbon
It is sieved after SiClx is broken, medium temperature coal pitch, aluminium powder, iron scale, SD80, caprolactam is added by obtained, the formula is sufficiently stirred
The big application of dress material of the converter fettling of production is with adhesive rate is high, resistance to flaking is good, sintering velocity is fast, resistance on converter installation
The small advantage of erosion, antiscour, high-temperature expansion, and adherence rate reaches 97% or more.Magnesia raw material rich in mineral resources, auxiliary
Raw material output can get, and formula is simple, reduce the inventory cost of raw material, the high-adhesiveness of product, which not only realizes, to be produced into
This decline, and reduce adverse effect of the residue to molten steel.Meanwhile reducing working strength, construction speed is accelerated,
The filling time is shortened, kiln service life is extended, reduces the consumption of refractory material.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of big fabric of converter fettling, which is characterized in that composed of the following components and each component mass percent are as follows: regeneration
Magnesium carbon: 25wt%；High-speed rail magnesia: 30wt%；Silicon carbide: 25wt%；Medium temperature coal pitch: 10wt%；Aluminium powder: 2wt%；Iron scale:
4wt%；SD80:3wt%；Caprolactam: 3wt%.
2. a kind of big fabric of converter fettling according to claim 1, which is characterized in that in secondary magnesium carbon, partial size is
The regenerative magnesia-carbon brick material of 0.3~1mm: 15wt%；Partial size is the regenerative magnesia-carbon brick material of 0.088mm: 10wt%.
3. a kind of big fabric of converter fettling according to claim 1, which is characterized in that in high-speed rail magnesia, partial size 1
The high-speed rail magnesia of~3mm: 14wt%；Partial size is the high-speed rail magnesia of 0.3~1mm: 16wt%.
4. a kind of big fabric of converter fettling according to claim 1, which is characterized in that in silicon carbide, partial size be 1~
The carbonization silicon material of 3mm: 10wt%；Partial size is the carbonization silicon material of 0.3~1mm: 15wt%.
5. a kind of big fabric of converter fettling according to claim 1, which is characterized in that Ti in the high-speed rail magnesia2O3+
The content of MgO is 92% or more.
6. a kind of preparation method of the big fabric of converter fettling described in claim 1, which is characterized in that specifically include following step
It is rapid:
A) it carries out secondary magnesium carbon, silicon carbide, high-speed rail magnesia to be broken into bulky grain with jaw crusher respectively；
B) secondary magnesium carbon, silicon carbide, high-speed rail magnesia are broken into the micro mist of 0.3~1mm respectively with kibbler roll；
C) partial regeneration magnesium carbon material micro mist is finely ground into partial size with ball mill is that 0.088mm seals magnesium micropowder again；
D) medium temperature coal pitch is weighed: 10wt%；Aluminium powder: 2wt%；Iron scale: 4wt%；SD80:3wt%；Caprolactam: 3wt%；
It pours into blender stirring to be pre-mixed for 30 minutes, is then sent to hybrid system；
E) it is sieved by partial size difference, taking partial size is the secondary magnesium carbon material of 0.3~1mm: 15wt%；Partial size is 0.088mm's
Secondary magnesium carbon material: 10wt%；Partial size is the high-speed rail magnesia of 1~3mm: 14wt%；Partial size is the high-speed rail magnesia of 0.3~1mm:
16wt%；Partial size is the carbonization silicon material of 1~3mm: 10wt%；Partial size is the carbonization silicon material of 0.3~1mm: 15wt%；By above-mentioned original
Material is put into mixing system tank, and mixing was delivered to hybrid system after 6~8 minutes；
F) above-mentioned material stirs to 5 in hybrid system~it is dispensed to obtain big fabric finished product after ten minutes.
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| CN110451934A (en) * | 2019-08-27 | 2019-11-15 | 北京利尔高温材料股份有限公司 | A kind of Large face repair material of converter |
| CN111333409A (en) * | 2020-03-11 | 2020-06-26 | 天津瑞利鑫环保科技有限公司 | Regenerated magnesia-carbon tundish dry material and preparation method thereof |
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Application publication date: 20190402 |