CN110272266A - Aluminium-silicon carbide-carbon refractory material - Google Patents
Aluminium-silicon carbide-carbon refractory material Download PDFInfo
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- CN110272266A CN110272266A CN201810222100.7A CN201810222100A CN110272266A CN 110272266 A CN110272266 A CN 110272266A CN 201810222100 A CN201810222100 A CN 201810222100A CN 110272266 A CN110272266 A CN 110272266A
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- aluminium
- silicon carbide
- reclaimed materials
- refractory material
- aluminium oxide
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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
- C04B35/10—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
- C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
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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
- 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
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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
- 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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5427—Particle size related information expressed by the size of the particles or aggregates thereof millimeter or submillimeter sized, i.e. larger than 0,1 mm
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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
- 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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
- C04B2235/5436—Particle size related information expressed by the size of the particles or aggregates thereof micrometer sized, i.e. from 1 to 100 micron
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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
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/65—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes
- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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- Chemical & Material Sciences (AREA)
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- Compositions Of Oxide Ceramics (AREA)
Abstract
A kind of aluminium-silicon carbide-carbon refractory material, comprising using alumina, Brown Alundum, white sub- corundum as the aluminium oxide of carrier, silicon carbide and graphite, it is characterized by: using reclaimed materials part substitution alumina, Brown Alundum and Bai Ya corundum virgin material after impurity elimination is crushed by discarded furnace lining or interior gallbladder channel, the additional amount of reclaimed materials calculated with the aluminium oxide contained by it account for the refractory material total oxidation aluminium content≤30%, the granular size of the reclaimed materials is between 8~0mm, moisture content≤0.5%.Disclosure address how substituted part virgin material using discarded aluminum/silicon carbide-carbon brick, and kept for original furnace life.
Description
Technical field:
The present invention relates to the refractory materials of molten iron pretreatment smelting vessel, especially with respect to the fire resisting using waste
Material.
Background technique:
For the sublimate, advanced and reduce cost for realizing steel-making, steel mill uses molten iron pretreatment method, i.e., by molten iron from
Blast furnace carries out the pretreatment such as desiliconization, dephosphorization and desulfurization before being sent to furnace steel stove, pre-process used container (such as torpedo hot metal mixer car, iron
Water packet, fish torpedo ladle) inner lining refractory erosion caused by above-mentioned pretreatment must be taken into consideration.Aluminium-silicon carbide-carbon fire proofed wood
The unburned brick of material manufacture is a kind of excellent with its good chemical resistance of concrete, thermal shock resistance, resistance to mechanical erosion and wearability
Refractory material, it is instead of previously used leck brick and mullite brick, mainly by accounting for weight percent 60~75%
The Al2O3 (specially alumina, Brown Alundum, sub-white corundum) of left and right.5~20% or so silicon carbide, 6~18% or so graphite
With the agitated mixing of a small amount of bonding agent at pug, finally by the heat treatment of 200 DEG C or so temperature, make its solidifying and setting at brick.
The aluminium-silicon carbide-carbon refractory material is in use due to for a long time by the melting loss of the molten iron of high temperature, the change of mechanical erosion and slag
It learns and corrodes, there is certain service life namely so-called furnace life.After reaching furnace life, process container needs repairing, old under removing
Liner is discarded, and if things go on like this, pile up like a mountain for these discarded refractory materials, is not only taken up an area, but also meeting generation environment pollution, becomes steel
The big burden of iron enterprise one.Another aspect refractory factory is that cost of material, production cost raise up again, and opposite product sale price is pressed down again
Institute fall because disturbing.A part of virgin material can be substituted using discarded aluminum/silicon carbide-carbon brick into need solution to be studied
Problem.
Summary of the invention:
The present invention provides a kind of aluminium-silicon carbide-carbon refractory material, solve how to utilize discarded aluminum/silicon carbide-carbon
Brick is come the technical issues of substituting part virgin material, and keep original service life.
The technical scheme to solve the above technical problems is that
A kind of aluminium-silicon carbide-carbon refractory material, comprising using alumina, Brown Alundum, white sub- corundum as the aluminium oxide of carrier,
Silicon carbide and graphite, it is characterised in that: replaced using the reclaimed materials part crushed after impurity elimination by laying-in in discarded pretreating containers
For alumina, Brown Alundum and Bai Ya corundum virgin material, it is total that with contained by it the aluminium oxide calculating of the additional amount of reclaimed materials accounts for the refractory material
Body alumina content≤30%, the granular size of the reclaimed materials is between 8~0mm, moisture content≤0.5%.
It is characterized by: the reclaimed materials should remove iron-containing impurity.
It is characterized by: the additional amount of the reclaimed materials is 15~25% when the aluminium oxide virgin material is based on Brown Alundum.
It is characterized by: the aluminium oxide virgin material with containing 80~86% aluminium oxide high grade bauxite be it is main when, the reclaimed materials
Additional amount be 20~30%.
It is characterized by: the alumina support of the virgin material and reclaimed materials composition, the weight percent of granular size are as follows:
Advantages of the present invention are as follows:
1, due to reducing the investment of aluminium oxide virgin material, part has been used to crush de-iron and other miscellaneous by discarded interior laying-in
The reclaimed materials of matter screening, reduces the expense of refractory material, to make contributions to reduce the cost of ironmaking, steel.
2, its service life reduces compared with all using virgin material, not only not, also slightly improves, especially interim inspection
Repairing the period has extension.
3, so that discarded refractory material is obtained the approach re-used, saved mine resources, be conducive to soil-water protection.
4, it solves the problems, such as the stacking of steel-making enterprise obsolete material, eliminates a large amount of stacking place, and eliminate environment
It is many because of border to pollute bring.
Specific embodiment:
The present invention remove by existing aluminium-silicon carbide-carbon refractory material manufacturing technology prepare new aluminium oxide (Al2O3),
Outside silicon carbide and graphite raw material, should also by molten steel pretreatmenting container discard inner lining refractory first use pulverizer or manually into
Row crushes；And by impurity therein, it is especially stained with the composition removal of irony, the method for removal is pickling and washing, and
Artificial pickup or magnetic；It is dried (usually under the conditions of temperature is 100 DEG C) to moisture content≤0.5%, is finally pressed again
8~5mm of particle, 5~1mm, 1~0.5mm, 0.5~0.08mm and < 0.08mm size fractionation are spare as reclaimed materials, or measurement
Wherein 5~1mm, 1~0.5mm, 0.5~0.08mm and < 0.08mm Different Size Fractions ratio are as system material, as meter when ingredient
Calculate foundation.In above-mentioned new material, carrier as aluminium oxide is usually used be high grade bauxite containing 80~86% aluminium oxide,
Brown Alundum containing 95% or so aluminium oxide and the sub-white corundum containing 98% or so aluminium oxide, graphite use scale as the carrier of carbon
Based on graphite.
Refractory material of the invention presses the weight percent of its chemical component like the prior art are as follows: aluminium oxide accounts for 60-
75%, silicon carbide accounts for 5~20%, carbon and accounts for 6~18%, and other is a small amount of bonding agent and additive, such as now commonly used
It is special asphalt solid binder, phenolic resin made of raw material etc. using discarded gas generator low temperature tar；Specifically by
Depending on position of the refractory material in furnace or in molten iron or steel ladle.
Partially recycled material is substituted new alumina raw material by the present invention, and additional amount is with aluminium oxide possessed in reclaimed materials
Content≤30% refractory material whole alumina content calculates.Refractory material of the invention is specifically regarded to pre-process for various molten iron
Depending on the virgin material carrier main species at position and aluminium oxide in container, the refractory material being normally at container slag line, due to
The normal phase is immersed in molten slag and molten iron, is subjected to the long-term chemical erosion of slag and is easy damage, reclaimed materials dosage can be reduced suitably；
And it is used for iron wire brick then reclaimed materials dosage can suitably increase.When aluminium oxide virgin material is main with Brown Alundum, reclaimed materials additional amount is accounted for
The 15~25% of whole alumina contents are advisable, and when virgin material is main with high grade bauxite, reclaimed materials additional amount accounts for whole aluminium oxide
The 20~30% of content are advisable.
After reclaimed materials is added in aluminium oxide virgin material in the present invention, should keep its granular size that there is proportion appropriate:
5~1mm particle accounts for 45~65%；1~0.5mm particle accounts for 15~30%；
0.5~0.08mm particle accounts for 4~10%；< 0.08mm particle accounts for 6~15%.
Above-mentioned aluminium oxide virgin material, reclaimed materials are entered into blender together with silicon carbide, carbon and bonding agent after weighing
It is kneaded into uniformly plastic pug, heat cure processing is carried out after the mud material forming under the conditions of 200 DEG C of temperature, just obtains
With the aluminium-silicon carbide-carbon refractory material that should have intensity, service life is no less than all using the aluminum/silicon carbide-of virgin material
Carbide refractory.
Claims (5)
1. a kind of aluminium-silicon carbide-carbon refractory material, comprising using alumina, Brown Alundum, white sub- corundum as the aluminium oxide of carrier, carbon
SiClx and graphite, it is characterised in that: using crushed by discarded furnace lining or interior gallbladder channel the reclaimed materials part substitution alumina after impurity elimination,
Brown Alundum and Bai Ya corundum virgin material, the additional amount of reclaimed materials account for the refractory material total oxidation aluminium with the aluminium oxide calculating contained by it
Content≤30%, the granular size of the reclaimed materials is between 8~0mm, moisture content < 0.5%.
2. aluminium-silicon carbide-carbon refractory material according to claim 1, it is characterised in that: the reclaimed materials should remove iron content
Impurity.
3. aluminium-silicon carbide-carbon refractory material according to claim 1 or 2, it is characterised in that: the aluminium oxide virgin material with
When based on Brown Alundum, the additional amount of the reclaimed materials is 15~25%.
4. aluminium-silicon carbide-carbon refractory material according to claim 1 or 2, it is characterised in that: the aluminium oxide virgin material with
When high grade bauxite containing 80~86% aluminium oxide is main, the additional amount of the reclaimed materials is 20~30%.
5. aluminium-silicon carbide-carbon refractory material according to claim 1 or 2, it is characterised in that: the virgin material and reclaimed materials
The alumina support of composition, the weight percent of granular size are as follows:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810222100.7A CN110272266A (en) | 2018-03-18 | 2018-03-18 | Aluminium-silicon carbide-carbon refractory material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810222100.7A CN110272266A (en) | 2018-03-18 | 2018-03-18 | Aluminium-silicon carbide-carbon refractory material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110272266A true CN110272266A (en) | 2019-09-24 |
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ID=67957899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810222100.7A Pending CN110272266A (en) | 2018-03-18 | 2018-03-18 | Aluminium-silicon carbide-carbon refractory material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110272266A (en) |
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2018
- 2018-03-18 CN CN201810222100.7A patent/CN110272266A/en active Pending
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190924 |