CN107098685A - A kind of electric furnace cover refractory material - Google Patents

A kind of electric furnace cover refractory material Download PDF

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Publication number
CN107098685A
CN107098685A CN201710353798.1A CN201710353798A CN107098685A CN 107098685 A CN107098685 A CN 107098685A CN 201710353798 A CN201710353798 A CN 201710353798A CN 107098685 A CN107098685 A CN 107098685A
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powder
electric furnace
furnace cover
refractory material
particle
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王杉杉
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Jiaxing New Building Materials Co Ltd
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Jiaxing New Building Materials Co Ltd
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    • 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
    • C04B35/10—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 aluminium oxide
    • C04B35/101—Refractories from grain sized mixtures
    • C04B35/105—Refractories from grain sized mixtures containing chromium oxide or chrome ore
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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
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    • 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
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303—Inorganic additives
    • 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
    • C21C5/52—Manufacture of steel in electric furnaces
    • C—CHEMISTRY; METALLURGY
    • 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
    • C04B2235/32—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
    • C04B2235/3241—Chromium oxides, chromates, or oxide-forming salts thereof
    • C04B2235/3243—Chromates or chromites, e.g. aluminum chromate, lanthanum strontium chromite
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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
    • C04B2235/3427—Silicates other than clay, e.g. water glass
    • C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
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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
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3852—Nitrides, e.g. oxynitrides, carbonitrides, oxycarbonitrides, lithium nitride, magnesium nitride
    • C04B2235/3865—Aluminium nitrides
    • C04B2235/3869—Aluminium oxynitrides, e.g. AlON, sialon
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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
    • C04B2235/38—Non-oxide ceramic constituents or additives
    • C04B2235/3891—Silicides, e.g. molybdenum disilicide, iron silicide
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    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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    • 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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    • 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
    • C04B2235/9623—Ceramic setters properties
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    • 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
    • C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
    • C04B2235/9676—Resistance against chemicals, e.g. against molten glass or molten salts against molten metals such as steel or aluminium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

The present invention is intended to provide a kind of electric furnace cover refractory material, includes the component of following percentage by weight：Pink fused alumina 18~33%, plate diamond spar particle 15~25%, electrofused mullite particle 8~12%, the , Xin Chrome spinel powders powder 3~8% of Sillimanite Particles 3~6%, aluminous cement 8~15%, α Al2O3Micro mist 2~6%, Fe3Si powder 5~8%, β Sialons powder 4~6%, additive 0.4 0.6%；The higher electric furnace environment of ratio is blended into suitable for molten iron, with good sintering character, iron-resistant scouring performance and heat-resistant knocking stability, antistrip performance is good in use.

Description

A kind of electric furnace cover refractory material
Technical field
The present invention relates to technical field of refractory materials, particularly a kind of electric furnace cover refractory material.
Background technology
The steelmaking equipment commonly used in STEELMAKING PRODUCTION is electric furnace arrangement for producing steel, electric furnace cover as electric furnace arrangement for producing steel important composition portion Divide, corroding for heat radiation, frequently thermal shock and the high-temperature slag splashings in steel-making by powerful high-temperature electric arc, is steel-making electricity The weak link of arc stove.
Under the conditions of early stage makes steel, steel-making intensity is small, smelting temperature is low, therefore conventional silica brick is built by laying bricks or stones as electric furnace cover, silica brick Light weight, intensity height, good thermal shock, creep efficiency are low, are widely applied；With the progress of Electric Furnace Steelmaking, steel-making Intensity increase, smelting temperature rise, silica brick is gradually by the refractory brick or castable refractory of the high aluminums such as mullite, high aluminate Substitution；With the increase of the molten iron amount of being blended into steel-making, the increase of oxygen blast intensity, electric furnace cover radiating effect are poor, cause aluminum within nearly 2 years Refractory brick or the service life of electric furnace cover that is made of castable refractory be greatly reduced.
Therefore, Chinese patent 200710052641.1 discloses a kind of high-alumina electric furnace cover pouring material and preparation method thereof, 75~90WT% of aluminium content, 3~15WT% of kyanite, are combined by aluminate cement and silicon-aluminum sol and pour shaping；It is Chinese special Profit 200710052640.7 announces a kind of aluminum oxide electric furnace cover pouring material and preparation method thereof, mainly using white fused alumina, high alumina Alumina, aggregate and the kyanite fine powder such as fused alumina zirconia, aluminum oxide fine powder etc. combines to pour by aluminous cement and silicon-aluminum sol to be built up Type.Above-mentioned patented technology is blended into the relatively low steelmaking operations of ratio in molten iron, with preferable iron-resistant scouring performance, still Molten iron be blended into ratio it is higher when, because molten iron slag is slant acidity slag, the resistance to material of High-Alumina is both sexes refractory material, therefore easily Corroded by molten iron slag.The resistance to material fragility of other High-Alumina is big, thermal shock resistance is poor, peels off serious in use, therefore in height Molten iron is blended under the conditions of ratio, and service life is not high.
The content of the invention
The present invention proposes a kind of electric furnace cover refractory material, it is desirable to provide the big fragility of the traditional corundum rigidity of one kind solution is big, Moulding poor defect is good there is provided a kind of corrosion resistance, moulding good, and thermal shock resistance is good, consistency is high, service life length, corrosion resistant The good electric furnace cover of corrosion.
A kind of electric furnace cover refractory material, includes the component of following percentage by weight：Pink fused alumina 18~33%, plate diamond spar Particle 15~25%, electrofused mullite particle 8~12%, Sillimanite Particles 3~6%, zinc chrome spinel powder 3~8%, calcium aluminate Cement 8~15%, α-Al2O3Micro mist 2~6%, Fe3Si powder 5~8%, β Sialons powder 4~6%, additive 0.4-0.6%.
The higher electric furnace environment of ratio is blended into present invention is particularly suitable for molten iron, with good sintering character, iron-resistant slag Erosion performance and heat-resistant knocking stability, antistrip performance is good in use.Compared with prior art, the present invention has as follows Beneficial effect：
1st, scour resistance is good, and thermal shock resistance is high.The aggregate of the present invention uses pink fused alumina and plate diamond spar, is favorably improved anti-invade Corrosion energy and resistance to slag corrosion, improve the resistance to flaking during use；By electrofused mullite particle and Sillimanite Particles, make Even in liquid phase is distributed in product under high temperature, on the one hand promotes high temperature sintering, improves elevated temperature strength, so that with preferably anti- Performance of flushing；On the other hand, the presence of a certain amount of liquid phase is remarkably improved the thermal shock resistance of product, prevents thermal shock effect from causing production The peeling damage of product；By introducing Fe3Si powder and β Sialon powder, can solve traditional corundum fragility greatly, poor toughness, thermal conductivity The defect of difference.
2nd, iron-resistant scouring performance is good.By adding aluminous cement and α-Al2O3Micro mist, improves electric furnace cover to slag Erosion-resisting characteristics, erosion rate of the slag to resistance to material can be slowed down, service life is improved；By adjusting Al2O3/SiO2Ratio, Promote product and molten iron or scum reaction production CaO6Al2O3And FeOAl2O3Spinelle, is conducive to resistance slag penetration to invade Lose internal refractories.
3rd, volume stability is good.The addition of Sillimanite Particles, mullite phase and liquid phase are started to decompose at 1500 DEG C or so With volumetric expansion, than the system that andalusite is more suitable for the present invention（Andalusite expansion temperature is more early）, there is product preferable Volume stability；3 kinds of additive melamine, Sai Ke-F and carboxymethyl cellulose are introduced simultaneously, can be very good to solve electric furnace The workability of lid.
It is preferred that, pink fused alumina weight percentage is 20%, electrofused mullite particle 8~12%.
It is preferred that, pink fused alumina grain graininess 8~20mm, Al2O3>=99wt%；Plate diamond spar particle 3~8mm, Al2O3≥ 98wt%；Electrofused mullite particle 1~3mm, Al2O3>=70wt%；Sillimanite Particles 0~1mm, Al2O3>=59.5wt%；Zinc Picotite powder 320 mesh of level, Al2O3>=99wt%； α-Al2O33 μm of micro mist grade, Al2O3>=99wt%；Aluminous cement Middle Al2O3>=80wt%.
Al in each material2O3With SiO2Content range selection, help further to adjust Al2O3/SiO2To most preferably matching somebody with somebody Than further promoting product and molten iron or scum reaction generation CaO6Al2O3And FeOAl2O3Spinelle, is conducive to resistance Slag penetration corrodes internal refractories.
It is preferred that, additive is 3 kinds of melamine, Sai Ke-F and carboxymethyl cellulose.
Aluminate cement used in the present invention, containing Pre-synthesized spinel, may advantageously facilitate the anti-of high-temperature electric bell Erosion performance.
It is preferred that, Sai Ke-F silica weight content 60-80%, alumina content is 10-30%.
It is preferred that, β Sialons purity >=90wt% and≤98wt%, Fe3Si purity >=90wt% and≤99 wt%；Greatly In or less than this scope, the change of the inside free composition and impurity can all have a strong impact on product during applied at elevated temperature Performance, can all largely effect on the invention effect of this product, cause electric furnace cover to shrink the big or rigid big and then lost of life.
Embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below in conjunction with following embodiments, shown So, described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based in the present invention Embodiment, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made, all Belong to the scope of protection of the invention.
Embodiment 1
Pink fused alumina 30%, plate diamond spar particle 25%, electrofused mullite particle 12%, Sillimanite Particles 3%, zinc chrome spinel powder 8%, aluminous cement 8%, α-Al2O3Micro mist 3%, Fe3Si powder 5%, β Sialons powder 6%, additive 0.4%.
Each component is weighed according to the part by weight in above, first by zinc chrome spinel powder, aluminous cement, α-Al2O3It is micro- Powder, Fe3Si powder, β Sialon powder, is made common milling；In production, plate diamond spar particle, electrofused mullite are added in common milling Premix is obtained after other surplus stocks, stirring 6min are added after particle, Sillimanite Particles, stir mixing 2min；Add appropriate Water, stirring 3 minutes after moulding by casting, after natural curing be stripped, dry.
It is preferred that, natural curing is stripped after 1 day, continues to conserve 3 days after the demoulding；When drying, enter 30 DEG C of kilneye temperature, dry Roasting time 80h, 300 DEG C of highest baking temperature.
Embodiment 2
Pink fused alumina 33%, plate diamond spar particle 22%, electrofused mullite particle 12%, Sillimanite Particles 3%, zinc chrome spinel powder 8%, aluminous cement 8%, α-Al2O3Micro mist 3%, Fe3Si powder 6%, β Sialons powder 5%, additive 0.5%.
Each component is weighed according to the part by weight in above, first by zinc chrome spinel powder, aluminous cement, α-Al2O3It is micro- Powder, Fe3Si powder, β Sialon powder, is made common milling；In production, plate diamond spar particle, electrofused mullite are added in common milling Premix is obtained after other surplus stocks, stirring 6min are added after particle, Sillimanite Particles, stir mixing 2min；Add appropriate Water, stirring 3 minutes after moulding by casting, after natural curing be stripped, dry.
It is preferred that, natural curing is stripped after 1 day, continues to conserve 3 days after the demoulding；When drying, enter 30 DEG C of kilneye temperature, dry Roasting time 80h, 600 DEG C of highest baking temperature.
Embodiment 3
Pink fused alumina 27%, plate diamond spar particle 25%, electrofused mullite particle 12%, Sillimanite Particles 3%, zinc chrome spinel powder 8%, aluminous cement 8%, α-Al2O3Micro mist 3%, Fe3Si powder 8%, β Sialons powder 6%, additive 0.6%.
Each component is weighed according to the part by weight in above, first by zinc chrome spinel powder, aluminous cement, α-Al2O3It is micro- Powder, Fe3Si powder, β Sialon powder, is made common milling；In production, plate diamond spar particle, electrofused mullite are added in common milling Premix is obtained after other surplus stocks, stirring 6min are added after particle, Sillimanite Particles, stir mixing 2min；Add appropriate Water, stirring 3 minutes after moulding by casting, after natural curing be stripped, dry.
It is preferred that, natural curing is stripped after 1 day, continues to conserve 3 days after the demoulding；When drying, enter 40 DEG C of kilneye temperature, toast Time 120h, 1200 DEG C of highest baking temperature.
After tested：The present invention is as follows according to the main physical and chemical index of product prepared by embodiment 1-3： Al2O3>=60%, SiO2≤ 10%.200 DEG C dry after the g/cm of bulk density >=2.73, apparent porosity (110 DEG C × 24h)≤15%, compressive resistance (110 DEG C × 24h) >=100MPa, Linear change rate (1500 DEG C × 3h) -0.5~+0.5%.The said goods are by 300 tons of electric furnaces It is on probation, molten iron proportion 70%, service life more than 160 times, stability is good in use；Used by 100 tons of electric furnaces, iron It is more than water ratio ＞ 80%, the stove of service life 100.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention God is with principle, and any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.

Claims (3)

1. a kind of electric furnace cover refractory material, includes the component of following percentage by weight：Pink fused alumina 18~33%, plate diamond spar Grain 15~25%, electrofused mullite particle 8~12%, Sillimanite Particles 3~6%, zinc chrome spinel powder 3~8%, calcium aluminate water Mud 8~15%, α-Al2O3Micro mist 2~6%, Fe3Si powder 5~8%, β Sialons powder 4~6%, additive 0.4-0.6%.
2. electric furnace cover refractory material according to claim 1, it is characterised in that：The pink fused alumina grain graininess 8~ 20mm, Al2O3>=99wt%；Plate diamond spar particle 3~8mm, Al2O3>=98wt%；Electrofused mullite particle 1~3mm, Al2O3 >=70wt%；Sillimanite Particles 0~1mm, Al2O3>=59.5wt%.
3. electric furnace cover refractory material according to claim 1, it is characterised in that：The fused white corundum fine powder grade 320 mesh, Al2O3>=99wt%； α-Al2O33 μm of micro mist grade, Al2O3>=99wt%；Al in aluminous cement2O3>=80wt%.
CN201710353798.1A 2017-05-18 2017-05-18 A kind of electric furnace cover refractory material Pending CN107098685A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111807849A (en) * 2020-07-21 2020-10-23 郑州长虹耐火材料有限公司 Long-life anti-erosion anti-stripping electric arc furnace cover and preparation method thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1552669A (en) * 2003-06-02 2004-12-08 贵州工业大学 Cylon-corundum powdery material and its production
CN104355634A (en) * 2014-10-28 2015-02-18 北京利尔高温材料股份有限公司 Alumina electric furnace cover and preparation method thereof
CN105272297A (en) * 2015-10-28 2016-01-27 河南科技大学 Fe-Sialon-corundum composite refractory material and preparation method thereof
CN105523751A (en) * 2015-12-21 2016-04-27 北京科技大学 Preparation method of brown corundum-ferrosilicon nitride composite material for cement kiln mouth

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1552669A (en) * 2003-06-02 2004-12-08 贵州工业大学 Cylon-corundum powdery material and its production
CN104355634A (en) * 2014-10-28 2015-02-18 北京利尔高温材料股份有限公司 Alumina electric furnace cover and preparation method thereof
CN105272297A (en) * 2015-10-28 2016-01-27 河南科技大学 Fe-Sialon-corundum composite refractory material and preparation method thereof
CN105523751A (en) * 2015-12-21 2016-04-27 北京科技大学 Preparation method of brown corundum-ferrosilicon nitride composite material for cement kiln mouth

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111807849A (en) * 2020-07-21 2020-10-23 郑州长虹耐火材料有限公司 Long-life anti-erosion anti-stripping electric arc furnace cover and preparation method thereof

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Application publication date: 20170829