CN109336627A - Aluminium melting furnace furnace lining castable and its preparation and application - Google Patents
Aluminium melting furnace furnace lining castable and its preparation and application Download PDFInfo
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- CN109336627A CN109336627A CN201811474906.1A CN201811474906A CN109336627A CN 109336627 A CN109336627 A CN 109336627A CN 201811474906 A CN201811474906 A CN 201811474906A CN 109336627 A CN109336627 A CN 109336627A
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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
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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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
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- 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
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
- C04B2235/5216—Inorganic
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- Ceramic Products (AREA)
Abstract
The invention belongs to refractory material development technique fields, and in particular to a kind of aluminium melting furnace furnace lining castable and its preparation and application.It easily loosened, fallen off using brick mode for existing aluminium melting furnace furnace lining, the problem of service life is low, high production cost, the present invention provides a kind of aluminium melting furnace furnace lining castables, composition includes: A ingredient and B component, A ingredient by weight percentage, fused brown corundum 68~70%, calcined bauxite in powder 18~20%, Alpha-alumina micro mist 4~6%, aluminous cement 2~4%, super silicon powder 2~4%；It is the stainless steel fibre for accounting for 1~2wt% of A ingredient that B, which becomes, accounts for the high efficiency water reducing agent of 0.2~0.4wt% of A ingredient and accounts for the explosion-proof fiber of 0.03~0.05wt% of A ingredient.The present invention also provides the preparation and application of above-mentioned castable, castable preparation furnace lining is high-densit, high-intensitive, good toughness, impact resistance, thermal shock performance are stablized, long service life has apparent economic benefit.
Description
Technical field
The invention belongs to refractory material development technique fields, and in particular to a kind of aluminium melting furnace furnace lining castable and its preparation
And application method.
Background technique
Currently, the aluminium melting furnace furnace lining for melting aluminium ingot production of most domestic aluminium melting furnace manufacturer design production is equal
It is built using high-alumina brick segmentation is carried out in punching block inner wall, the combination of scene segmentation abutting joint.The aluminium melting furnace was producing
Cheng Zhong, since raw materials for production (500Kg/ bucket is added in 20Kg/ block aluminium ingot, single) mention elevator from top adding manner using bucket,
Furnace lining is laid bricks the influence frequently corroded by the strong impaction of aluminium ingot, high temperature and molten aluminum, is caused furnace lining to lay bricks and is frequently loosened, is de-
It falls, molten aluminum leakage, furnace lining whole service life is low, influence rhythm of production, the protrusion of maintenance long construction period, high production cost is asked
Topic.
Summary of the invention
The technical problem to be solved in the present invention are as follows: existing aluminium melting furnace furnace lining is easily loosened, fallen off using brick mode, uses the longevity
The problem of ordering low, high production cost.
The technical solution of present invention solution above-mentioned technical problem are as follows: a kind of aluminium melting furnace furnace lining castable is provided.The casting
The composition of material includes: A ingredient and B component, A ingredient by weight percentage, fused brown corundum 68~70%, calcined bauxite in powder 18~
20%, Alpha-alumina micro mist 4~6%, aluminous cement 2~4%, super silicon powder 2~4%；B become for account for A ingredient 1~
The stainless steel fibre of 2wt% accounts for the high efficiency water reducing agent of 0.2~0.4wt% of A ingredient and accounts for the anti-of 0.03~0.05wt% of A ingredient
Quick-fried fiber.
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, the fused brown corundum includes 0~3mm of partial size, 3~8mm and
The fused brown corundum particle of 8~12mm.Further, the fused brown corundum particle of the 0~3mm accounts for 19~22%, 3~8mm
Fused brown corundum particle account for 18~21%, the fused brown corundum particle of 8~12mm accounts for 25~28%.
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, the calcined bauxite in powder is Al2O3The stunt alum of content >=88.0%
Native powder.Further, the high grade bauxite powder diameter≤0.088mm, bulk density >=3.45g/cm3, water absorption rate≤
2.5%.
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, the Alpha-alumina micro mist is Al2O3Content >=99.6%
Alumina powder.Further, the Alpha-alumina grain size of micropowder is 1.3~1.7 μm.
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, the aluminous cement model CA-71.
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, the super silicon powder model 94 surpasses silicon powder.
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, the stainless steel fibre is universal stainless steel fibre.
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, the water-reducing agent is MonaIadd P201 high efficiency composition diminishing
Agent.
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, the explosion-proof fiber is a kind of raising refractory material baking property
The specialty fibers of energy and whole service life.
The present invention also provides a kind of preparation methods of above-mentioned aluminium melting furnace furnace lining castable, comprising the following steps:
Raw material is weighed by weight ratio, and blender, mixing time >=5min/ is added by the descending sequence of raw material particle size
It fills, obtains aluminium melting furnace furnace lining castable.
The present invention also provides a kind of application methods of above-mentioned aluminium melting furnace furnace lining castable, comprising the following steps:
A, aluminium melting furnace is laid bricks overall pulling down, cleaning punching block covers inner wall sundries, and it is equal to drill out distribution on aluminium melting furnace punching block set
Even air hole, then anchoring piece is welded by spacing 30cm in punching block set inner wall, fire clay pastes thermal insulation cotton；
B, the water of 5~6wt% will be added in castable, stir evenly, inject in aluminium melting furnace die sleeve, vibratory compaction, it is natural
Maintenance 24~36 hours, demoulding spontaneously dry 4~5 days, are packed into step a treated aluminium melting furnace.
Wherein, in the application method of above-mentioned aluminium melting furnace furnace lining castable, between the transverse direction of air hole described in step a, longitudinal direction
Away from being 40cm, diameter 8cm.
Compared with prior art, the invention has the benefit that
The present invention provides a kind of aluminium melting furnace furnace lining castables, by selecting suitable raw material, and each raw material are carried out
Suitable proportion so that the aluminium melting furnace furnace lining of castable preparation have high-densit (low-porosity), it is high-intensitive (low temperature, medium temperature,
Elevated temperature strength is larger), good toughness, impact resistance, thermal shock performance stablize (volume stability at various temperatures), resistant to corrosion, impervious
Saturating effect.The present invention prepares castable and the method for furnace lining is easy to operate, effectively improves 2~3 times of lining durability, solves simultaneously
Past frequently, causes the problem that rhythm of production is nervous, production efficiency is not high, operating cost is high, economic benefit because of furnace lining maintenance
Significantly.
Specific embodiment
The present invention provides a kind of aluminium melting furnace furnace lining castable, composition includes: A ingredient and B component, and A ingredient is by weight
Percentages, fused brown corundum 68~70%, calcined bauxite in powder 18~20%, Alpha-alumina micro mist 4~6%, aluminous cement 2~
4%, super silicon powder 2~4%；It is the stainless steel fibre for accounting for 1~2wt% of A ingredient that B, which becomes, accounts for the height of 0.2~0.4wt% of A ingredient
Effect water-reducing agent and the explosion-proof fiber for accounting for 0.03~0.05wt% of A ingredient.
Wherein, it in above-mentioned aluminium melting furnace furnace lining castable, is not segregated and has in the construction process for guarantee castable
There is higher intensity, fused brown corundum partial size is formed and is determined as 0~3mm, the granularity of 3~8mm, 8~12mm, by weight ratio
0~3mm accounts for 19~22%, and 3~8mm accounts for 18~21%, and 8~12mm accounts for 25~28%% equal different materials grades and mixes.
For the scour resistance and higher volumes density for guaranteeing castable, the main physical and chemical index of the fused brown corundum is Al2O3≥
95.0%；Bulk density >=3.85g/cm3。
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, for the dispersion performance for guaranteeing powder in castable, the alumina
Powder diameter is≤0.088mm.
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, the partial size of the Alpha-alumina micro mist is 1.5 μm ± 0.2,
Al2O3>=99.6% Reactive alumina.
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, the aluminous cement model CA-71.
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, the super silicon powder model 94 surpasses silicon powder.
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, the stainless steel fibre is universal stainless steel fibre.
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, the water-reducing agent is MonaIadd P201 high efficiency water reducing agent.
Wherein, in above-mentioned aluminium melting furnace furnace lining castable, the explosion-proof fiber is a kind of raising refractory material baking property
The specialty fibers of energy and whole service life.
The present invention also provides a kind of preparation methods of above-mentioned aluminium melting furnace furnace lining castable, comprising the following steps:
Raw material is weighed by weight ratio, and blender, mixing time >=5min/ is added by the descending sequence of raw material particle size
It fills, obtains aluminium melting furnace furnace lining castable.
The present invention also provides a kind of application methods of above-mentioned aluminium melting furnace furnace lining castable, comprising the following steps:
A, aluminium melting furnace is laid bricks overall pulling down, cleaning punching block covers inner wall sundries, drills out on aluminium melting furnace punching block set lateral, vertical
It is the air hole that 8cm is evenly distributed to spacing 40cm, diameter, then in punching block set inner wall by lateral, longitudinal pitch 30cm weld anchor
Firmware, fire clay paste thermal insulation cotton；
B, the water of 5~6wt% will be added in castable, stir evenly, inject in aluminium melting furnace die sleeve, vibratory compaction, it is natural
Maintenance 24~36 hours, demoulding spontaneously dry 4~5 days, are packed into step a treated aluminium melting furnace.
Wherein, in the application method of above-mentioned aluminium melting furnace furnace lining castable, between the transverse direction of air hole described in step a, longitudinal direction
Away from for 40cm, diameter 8cm.
Explanation will be further explained to a specific embodiment of the invention by embodiment below, but do not indicated this
The protection scope of invention is limited in range described in embodiment.
Embodiment 1 prepares aluminium melting furnace furnace lining castable, laboratory test and physicochemical property detection of the present invention
It designs according to aluminium melting furnace furnace lining castable theory formula, is examined in labs little sample testing and physicochemical property
It surveys, this experimental design casting material formula composition are as follows: fused brown corundum 68.0%, calcined bauxite in powder 20.0%, Alpha-alumina micro mist
4.0%, aluminous cement 3.0%, super silicon powder 4.0%, stainless steel fibre 1.5%, high efficiency water reducing agent 0.25%, explosion-proof fiber
0.05%.
Specific operating procedure are as follows:
A, castable is prepared
After raw material is weighed, blender is added by the descending sequence of partial size, mixing time >=5min/ is filled, melted
Aluminium furnace furnace lining castable；And the chemical component of castable is detected.
B, prepared castable is mixed 2~3 minutes in pony mixer, the water of 5~6wt% is added, stirring is equal
It is even, its mobility is detected after discharging, then by vibratory compaction, sample in the mold of the castable injection ㎜ × 160 of 40 ㎜ × 40 ㎜
It demoulds after 24 hours, sample is put into baking oven through drying in 110 DEG C × 24 hours after demoulding, then the sample after drying is distinguished
Then calcination processing under the conditions of 800 DEG C × 3h, 1400 DEG C × 3h carries out bulk density, refractoriness, stomata to the sample of processing
Rate, normal temperature strength, medium temperature intensity, elevated temperature strength and refractoriness are detected.
C, sample physicochemical property testing result
The detection of 1 aluminium melting furnace furnace lining castable physicochemical property of table
The aluminium melting furnace furnace lining castable that embodiment 1 is prepared, during the test, the mobility of the castable is poor,
There is certain influence to site operation.Other physical and chemical indexes substantially meet design requirement, and further progress is needed to optimize and revise.
Embodiment 2 prepares aluminium melting furnace furnace lining castable, laboratory test and physicochemical property detection of the present invention
It designs according to aluminium melting furnace furnace lining castable theory formula, is examined in labs little sample testing and physicochemical property
It surveys, this experimental design casting material formula composition are as follows: fused brown corundum 70.0%, calcined bauxite in powder 18.0%, Alpha-alumina micro mist
6.0%, aluminous cement 3.0%, super silicon powder 3.0%, stainless steel fibre 1.0%, high efficiency water reducing agent 0.3%, explosion-proof fiber
0.03%.
Specific operating procedure are as follows:
A, castable is prepared
After raw material is weighed, blender is added by the descending sequence of partial size, mixing time >=5min/ is filled, melted
Aluminium furnace furnace lining castable；And the chemical component of castable is detected.
B, prepared castable is mixed 3 minutes in pony mixer, the water of 6wt% is added, stirs evenly, discharged
After detect its mobility, then by castable injection the ㎜ × 160 of 40 ㎜ × 40 ㎜ mold in vibratory compaction, sample was through 24 hours
After demould, sample is put into baking oven through drying in 110 DEG C × 24 hours, then by the sample after drying respectively at 800 DEG C after demoulding
Then calcination processing under the conditions of × 3h, 1400 DEG C × 3h carries out bulk density, refractoriness, the porosity, room temperature to the sample of processing
Intensity, medium temperature intensity, elevated temperature strength and refractoriness are detected.
C, sample physicochemical property testing result
The detection of 1 aluminium melting furnace furnace lining castable physicochemical property of table
The aluminium melting furnace furnace lining castable that embodiment 2 is prepared, during the test, the mobility of the castable are relatively implemented
Example 1 has certain improvement, but not very ideal, has certain influence to site operation quality.Other physical and chemical indexes substantially meet design
It is required that further progress is needed to optimize and revise.
Embodiment 3 prepares aluminium melting furnace furnace lining castable, laboratory test and physicochemical property detection of the present invention
It designs according to aluminium melting furnace furnace lining castable theory formula, is examined in labs little sample testing and physicochemical property
It surveys, this experimental design casting material formula composition are as follows: fused brown corundum 70.0%, calcined bauxite in powder 20.0%, Alpha-alumina micro mist
5.0%, aluminous cement 3.0%, super silicon powder 2.0%, stainless steel fibre 1.5%, high efficiency water reducing agent 0.2%, explosion-proof fiber
0.04%.
Specific operating procedure are as follows:
A, castable is prepared
After raw material is weighed, blender is added by the descending sequence of partial size, mixing time >=5min/ is filled, melted
Aluminium furnace furnace lining castable；And the chemical component of castable is detected.
B, prepared castable is mixed 3 minutes in pony mixer, the water of 6wt% is added, stirs evenly, discharged
After detect its mobility, then by castable injection the ㎜ × 160 of 40 ㎜ × 40 ㎜ mold in vibratory compaction, sample was through 24 hours
After demould, sample is put into baking oven through drying in 110 DEG C × 24 hours, then by the sample after drying respectively at 800 DEG C after demoulding
Then calcination processing under the conditions of × 3h, 1400 DEG C × 3h carries out bulk density, refractoriness, the porosity, room temperature to the sample of processing
Intensity, medium temperature intensity, elevated temperature strength and refractoriness are detected.
C, sample physicochemical property testing result
The detection of 1 aluminium melting furnace furnace lining castable physicochemical property of table
The aluminium melting furnace furnace lining castable that embodiment 3 is prepared, during laboratory test, the mobility of the castable
Preferably, meet site operation quality requirement.Other physical and chemical indexes are significantly improved compared with embodiment 1, embodiment 2, by comparing, most
Determine that this formula is aluminium melting furnace furnace lining commerical test casting material formula eventually.
Embodiment 4 prepares aluminium melting furnace furnace lining castable of the present invention, physicochemical property detection
The various raw material weight proportioning of soup processed compositions of castable are as follows: fused brown corundum 70.0%, calcined bauxite in powder 20.0%, Alpha-alumina is micro-
Powder 5.0%, aluminous cement 3.0%, super silicon powder 2.0%, stainless steel fibre 1.5% (additional), high efficiency water reducing agent 0.2%
(additional), explosion-proof fiber 0.03% (additional).
Specific operating procedure are as follows:
A, castable is prepared
After raw material is weighed, blender is added by the descending sequence of partial size, mixing time >=5min/ is filled, melted
Aluminium furnace furnace lining castable；
B, aluminium melting furnace is laid bricks overall pulling down, cleaning punching block covers inner wall sundries, on aluminium melting furnace punching block set by laterally, it is longitudinal
It is the air hole that 8cm is evenly distributed that spacing 40cm, which drills out diameter, then in punching block set inner wall by lateral, longitudinal pitch 30cm weld anchor
Firmware, fire clay paste thermal insulation cotton.
C, the clean water of 5.5wt% will be added in castable, stir evenly (4 minutes/tank of mixing time), obtain mobility
Moderate castable injects castable in aluminium melting furnace die sleeve, using vibrating head vibratory compaction, takes off after natural curing 36 hours
Mould observes cast bed of material any surface finish, closely knit after demoulding, after spontaneously drying 5 days, carry out handling installation using crane, install
Finish it is toasted after put into production use.
The aluminium melting furnace furnace lining castable that embodiment 4 is prepared is detected by sample, and physicochemical property see the table below shown in 1:
The detection of 1 aluminium melting furnace furnace lining castable physicochemical property of table
By the result of embodiment 1,2,3,4 it is found that the aluminium melting furnace furnace lining high alumina that the present invention is prepared using low cement, Ultramicro-powder
Castable, the physicochemical property of 1,2,3,4 castable of embodiment are able to satisfy product design technology requirement, and embodiment 1,2,3 is poured
For material in addition to mobility is relatively poor, remaining index meets product design requirement.But with embodiment 3,4 castable integral construction performances
And physicochemical property is optimal, and is verified in the integrated poured work progress of aluminium melting furnace furnace lining and use process.
The present invention is high using low cement, Ultramicro-powder by climbing steel aluminum products factory aluminium melting furnace furnace lining production application
The aluminium castable integrated poured aluminium melting furnace furnace lining continuous use service life is former 3 times using furnace lining of laying bricks, while being solved over
Frequently because of furnace lining maintenance, the difficulty that rhythm of production is nervous, production efficiency is not high, operating cost is high is caused to mention, using effect is used
Family favorable comment.
Claims (9)
1. aluminium melting furnace furnace lining castable, which is characterized in that composition includes: A ingredient and B component, and A ingredient is by weight percentage
Meter, fused brown corundum 68~70%, calcined bauxite in powder 18~20%, Alpha-alumina micro mist 4~6%, aluminous cement 2~4%, super silicon
Micro mist 2~4%；It is the stainless steel fibre for accounting for 1~2wt% of A ingredient that B, which becomes, accounts for the high efficiency water reducing agent of 0.2~0.4wt% of A ingredient
With the explosion-proof fiber for accounting for 0.03~0.05wt% of A ingredient.
2. aluminium melting furnace furnace lining castable according to claim 1, it is characterised in that: the fused brown corundum includes grain
The fused brown corundum particle of diameter 0~3mm, 3~8mm and 8~12mm.
3. aluminium melting furnace furnace lining castable according to claim 1, it is characterised in that: the fused brown corundum of the 0~3mm
Particle accounts for 19~22%, and the fused brown corundum particle of 3~8mm accounts for 18~21%, and the fused brown corundum particle of 8~12mm accounts for 25~
28%.
4. aluminium melting furnace furnace lining castable according to claim 1, it is characterised in that: the calcined bauxite in powder is Al2O3Content
>=88.0% stunt calcined bauxite in powder；Preferably, the high grade bauxite powder diameter≤0.088mm, bulk density >=3.45g/
cm3。
5. aluminium melting furnace furnace lining castable according to claim 1, it is characterised in that: the Alpha-alumina micro mist is
Al2O3The alumina powder of content >=99.6%；Preferably, the Alpha-alumina grain size of micropowder is 1.3~1.7 μm.
6. aluminium melting furnace furnace lining castable according to claim 1, it is characterised in that: meet it is at least one of following,
The aluminous cement model CA-71；
The super silicon powder model 94 surpasses silicon powder；
The stainless steel fibre is universal stainless steel fibre；
The water-reducing agent is MonaIadd P201 high efficiency composition water-reducing agent.
7. the preparation method of aluminium melting furnace furnace lining castable described in any one of claims 1-6, which is characterized in that including following
Step:
Raw material is weighed by weight ratio, and blender is added by the descending sequence of raw material particle size, mixing time >=5min/ is filled,
Obtain aluminium melting furnace furnace lining castable.
8. the application method of aluminium melting furnace furnace lining castable described in any one of claims 1-6, which is characterized in that including following
Step:
A, aluminium melting furnace is laid bricks overall pulling down, cleaning punching block covers inner wall sundries, drills out on aluminium melting furnace punching block set and to be evenly distributed
Air hole, then anchoring piece is welded by spacing 30cm in punching block set inner wall, fire clay pastes thermal insulation cotton；
B, the water of 5~6wt% will be added in castable, stir evenly, inject in aluminium melting furnace die sleeve, vibratory compaction, natural curing
24~36 hours, demoulding spontaneously dried 4~5 days, was packed into step a treated aluminium melting furnace.
9. application method described in step a according to claim 8, it is characterised in that: the transverse direction of air hole described in step a,
Longitudinal pitch is 40cm, diameter 8cm.
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Cited By (2)
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| CN111116218A (en) * | 2020-02-18 | 2020-05-08 | 巩义市瑞东耐火材料有限公司 | Acid-corrosion-resistant high-strength combined block for circulating fluidized bed boiler lining |
| CN115626815A (en) * | 2022-11-14 | 2023-01-20 | 天津泽希矿产加工有限公司 | Refractory castable based on spherical micro powder and preparation process thereof |
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