CN110342949A - Swinging sliding nozzle Anti-cracking castable and pouring technology - Google Patents
Swinging sliding nozzle Anti-cracking castable and pouring technology Download PDFInfo
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- CN110342949A CN110342949A CN201910741597.8A CN201910741597A CN110342949A CN 110342949 A CN110342949 A CN 110342949A CN 201910741597 A CN201910741597 A CN 201910741597A CN 110342949 A CN110342949 A CN 110342949A
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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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/14—Charging or discharging liquid or molten material
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- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Ceramic Products (AREA)
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Abstract
The invention discloses a kind of swinging sliding nozzle Anti-cracking castables and pouring technology, according to parts by weight include following components: alumina 25-30 part Brown Alundum 15-20 part silicon carbide 25-47 part bonding agent 5 part of the aluminum oxide content 88% or more；The silicon carbide and 325 mesh silicon carbide of 10-12 part that wherein silicon carbide is 0-3 μm by 15-35 parts of granularities form.This programme improves accounting of the silicon carbide in entire pouring material, improves the heat vibration property of castable to a certain extent；Simultaneously to the specific granularity selection of silicon carbide, the silicon carbide of suitable particle size is selected, and controls the ratio of different grain size silicon carbide further to improve heat vibration property, further promotes the service life of castable.
Description
Technical field
The present invention relates to pouring molten steel fields, in particular to swinging sliding nozzle Anti-cracking castable and pouring technology.
Background technique
The effect of swinging sliding nozzle device is that the molten iron of trough outflow is passed through to switching, the transition of this equipment, is collected into finger
In fixed 140t hot-metal ladle and carriage.
Swinging sliding nozzle device by swinging sliding nozzle, swing set a roof beam in place, transmission mechanism, power device, chute bracket etc. form.Power
Device realizes the angle swinging of chute bracket by transmission mechanism, so that control is located at the swinging sliding nozzle on chute bracket.
Swinging sliding nozzle is used because itself is often exposed in air, causes swinging sliding nozzle castable because thermal shock resistance is poor, and is produced
Raw crackle, influences the service life of product.
Summary of the invention
It is poured in view of the deficienciess of the prior art, the first object of the present invention is to provide a kind of swinging sliding nozzle with Anti-cracking
Material feeding is conducive to promote swinging sliding nozzle service life.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of swinging sliding nozzle Anti-cracking castable includes following components according to parts by weight:
Aluminum oxide content is at 25-30 parts of alumina of 88% or more
15-20 parts of Brown Alundum
25-47 parts of silicon carbide
5 parts of bonding agent；
The silicon carbide and 325 mesh silicon carbide of 10-12 part that wherein silicon carbide is 0-3 μm by 15-35 parts of granularities form.
Firstly, this programme improves accounting of the silicon carbide in entire castable, castable is improved to a certain extent
Heat vibration property；Simultaneously to the specific granularity selection of silicon carbide, the silicon carbide of suitable particle size is selected, and controls different grain size silicon carbide
Ratio come further improve heat vibration property, further promoted castable service life.
Further, the castable further includes 0.5-1.5 parts of steel fibres.
Castable expansion rate can be improved in the addition of steel fibre, reduces and goes out because castable and pendulum mouth shell expansion are inconsistent
The probability of existing crackle, promotes swinging sliding nozzle service life.
Further, bonding agent selects aluminium dihydrogen phosphate.
Above-mentioned substance is combined by aluminium dihydrogen phosphate, and aluminium dihydrogen phosphate mobility is stronger, and associativity is more preferable.
Further, the silicon carbide of 0-3 μm of granularity is 15-20 parts.
It is 15-20 parts in the silicon carbide of 0-3 μm of granularity, and 325 mesh silicon carbide are 10-12 parts, the ratio of the former with the latter
Range is between 1.25-2, and above-mentioned the two is varigrained, and silicon carbide is in aforementioned proportion and silicon carbide total amount reaches certain numerical value
When, the cracking resistance of castable is best.
The second object of the present invention is to provide a kind of pouring technology of swinging sliding nozzle Anti-cracking castable.
A kind of pouring technology of swinging sliding nozzle Anti-cracking castable includes the following steps: that step 1) cleans swinging sliding nozzle
Steel shell；Step 2) by each component add water carry out be mixed form wet feed；The wet feed is coated in swinging sliding nozzle by step 3)
It carries out spontaneously drying solidification 12h on steel shell；Step 4) toasts the swinging sliding nozzle after step 3).
Further, baking be made of two stages, the first stage be swinging sliding nozzle is put at 200 DEG C carry out baking and
With 20 DEG C/min of speed increase to 500 DEG C, stop 5 minutes at 500 DEG C: second stage is to slip the swing under 500 degrees Celsius
Mouth is directly placed into 1000 DEG C of oven, and toasts 1h.
By in 200 DEG C -500 DEG C of gradually drying, and stablized at 500 DEG C, is directly jumped to later from 500 DEG C
In 1000 DEG C of oven environment, the thermal shock resistance of swinging sliding nozzle is on the one hand examined, on the other hand accelerates baking speed.
In conclusion the invention has the following advantages: 1) promoting castable by increasing silicon carbide proportion
Anti crack performance；2) proportion for carrying out selection and different grain size silicon carbide to the granularity of silicon carbide further promotes the anti-of castable
Fragility energy；3) anti crack performance of castable is further promoted by increasing steel fibre；4) it by selecting suitable bonding agent, is promoted
The anti crack performance of castable.
Specific embodiment
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Embodiment 1: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 25 parts of alumina of 88% or more
15 parts of Brown Alundum
5 parts of bonding agent；
The silicon carbide and 10 part of 325 mesh silicon carbide that 15 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 2: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 30 parts of alumina of 88% or more
20 parts of Brown Alundum
5 parts of bonding agent；
The silicon carbide and 12 part of 325 mesh silicon carbide that 35 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 3: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 25 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 4: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 13 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 5: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 14 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 6: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 15 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 7: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 16 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 8: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 17 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 9: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 18 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 10: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 19 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 11: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 20 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 12: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 21 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 13: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 22 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 14: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 25 parts of alumina of 88% or more
15 parts of Brown Alundum
1 part of steel fibre
5 parts of bonding agent；
The silicon carbide and 10 part of 325 mesh silicon carbide that 15 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 15: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 30 parts of alumina of 88% or more
20 parts of Brown Alundum
1 part of steel fibre
5 parts of bonding agent；
The silicon carbide and 12 part of 325 mesh silicon carbide that 35 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 16: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
1 part of steel fibre
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 25 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 17: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
1 part of steel fibre
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 13 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 18: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
1 part of steel fibre
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 14 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 19: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
1 part of steel fibre
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 15 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 20: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
1 part of steel fibre
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 16 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 21: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
1 part of steel fibre
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 17 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 22: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
1 part of steel fibre
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 18 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 23: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
1 part of steel fibre
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 19 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 24: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
1 part of steel fibre
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 20 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 25: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
1 part of steel fibre
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 21 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Embodiment 26: swinging sliding nozzle Anti-cracking castable and pouring technology include following components: three according to parts by weight
Al 2 O content is at 27 parts of alumina of 88% or more
17 parts of Brown Alundum
1 part of steel fibre
5 parts of bonding agent；
The silicon carbide and 11 part of 325 mesh silicon carbide that 22 parts of granularities are 0-3 μm, bonding agent select aluminium dihydrogen phosphate.
Comparative example 1: the difference with embodiment 16 is: 325 mesh silicon carbide are substituted for 325 mesh silicon powders.
Comparative example 2: the difference with embodiment 16 is: silicon carbide is only made of the silicon carbide that 36 parts of granularities are 0-3 μm.
Comparative example 3: the difference with embodiment 16 is: silicon carbide is only made of the silicon carbide that 36 parts of granularities are 325 mesh.
Comparative example 4: the difference with embodiment 16 is: silicon carbide is 3-5 μm of silicon carbide and 11 part 325 by 25 parts of granularities
Mesh silicon carbide composition.
Comparative example 5: the difference with embodiment 16 is: silicon carbide is 5-7 μm of silicon carbide and 11 part 325 by 25 parts of granularities
Mesh silicon carbide composition.
Comparative example 6: the difference with embodiment 16 is: silicon carbide is 7-10 μm of silicon carbide and 11 parts by 25 parts of granularities
325 mesh silicon carbide composition.
Comparative example 7: the difference with embodiment 16 is: silicon carbide is 10-13 μm of silicon carbide and 11 parts by 25 parts of granularities
325 mesh silicon carbide composition.
Comparative example 8: the difference with embodiment 16 is: silicon carbide is 13-16 μm of silicon carbide and 11 parts by 25 parts of granularities
325 mesh silicon carbide composition.
Comparative example 9: the difference with embodiment 16 is: silicon carbide is 0-3 μm of silicon carbide and 11 part 270 by 25 parts of granularities
Mesh (53 microns) silicon carbide composition.
Comparative example 10: the difference with embodiment 16 is: silicon carbide is 0-3 μm of silicon carbide and 11 parts by 25 parts of granularities
230 mesh (61 microns) silicon carbide composition.
Comparative example 11: the difference with embodiment 16 is: silicon carbide is 0-3 μm of silicon carbide and 11 parts by 25 parts of granularities
400 mesh (38 microns) silicon carbide composition.
Comparative example 12: the difference with embodiment 16 is: silicon carbide is 0-3 μm of silicon carbide and 11 parts by 25 parts of granularities
460 mesh (30 microns) silicon carbide composition.
Comparative example 13: the difference with embodiment 16 is: silicon carbide is 0-3 μm of silicon carbide and 11 parts by 25 parts of granularities
540 mesh (26 microns) silicon carbide composition.
Comparative example 14: the difference with embodiment 16 is: silicon carbide is 7-10 μm of silicon carbide and 11 parts by 25 parts of granularities
400 mesh (38 microns) silicon carbide composition.
Comparative example 15: the difference with embodiment 16 is: silicon carbide is 7-10 μm of silicon carbide and 11 parts by 25 parts of granularities
460 mesh (30 microns) silicon carbide composition.
Comparative example 16: the difference with embodiment 16 is: silicon carbide is 5-7 μm of silicon carbide and 11 parts by 25 parts of granularities
540 mesh (26 microns) silicon carbide composition.
Illustrate: 325 mesh are 44 microns.
Test: above-described embodiment and comparative example are all made of following method preparation.The steel shell of step 1) cleaning swinging sliding nozzle；Step
It is rapid 2) by each component add water carry out be mixed form wet feed；The wet feed is coated on the steel shell of swinging sliding nozzle and carries out by step 3)
Spontaneously dry solidification 12h；Step 4) toasts the swinging sliding nozzle after step 3).Baking is made of two stages, the
One stage was that swinging sliding nozzle is put at 200 DEG C to carry out baking and with 20 DEG C/min of speed increase to 500 DEG C, was stopped at 500 DEG C
Stay 5 minutes: second stage is in the oven for be directly placed into the swinging sliding nozzle under 500 degrees Celsius 1000 DEG C, and toasts 1h.
Test the service life number of swinging sliding nozzle.
It is obtained by comparative example 2-12 and embodiment 16, the partial size selection of silicon carbide selects ratio to the cracking resistance of castable
It is more crucial, it is best using 0-3 μm of silicon carbide and 325 mesh silicon carbide effects.
Comparative example 1-13 and embodiment 14-26 illustrates that the addition of steel fibre helps to promote castable cracking resistance.
It can be seen that the particular number selection of 0-3 μm of silicon carbide and 325 mesh silicon carbide by comparative example 1-13,
And the Ratio control of the two, existing on the cracking resistance of castable influences.
Claims (6)
1. a kind of swinging sliding nozzle Anti-cracking castable, which is characterized in that according to parts by weight include following components:
Aluminum oxide content is at 25-30 parts of alumina of 88% or more
15-20 parts of Brown Alundum
25-47 parts of silicon carbide
5 parts of bonding agent；
The silicon carbide and 325 mesh silicon carbide of 10-12 part that wherein silicon carbide is 0-3 μm by 15-35 parts of granularities form.
2. swinging sliding nozzle according to claim 1 Anti-cracking castable, it is characterized in that: the castable further includes 0.5-
1.5 parts of steel fibres.
3. swinging sliding nozzle according to claim 1 Anti-cracking castable, it is characterized in that: bonding agent selects biphosphate
Aluminium.
4. swinging sliding nozzle according to claim 1 Anti-cracking castable, it is characterized in that: the silicon carbide of 0-3 μm of granularity is
15-20 parts.
5. a kind of pouring technology of the swinging sliding nozzle Anti-cracking castable as described in claim 1-4 any one, characterized in that
Include the following steps: the steel shell of step 1) cleaning swinging sliding nozzle；Step 2 by each component add water carry out be mixed form wet feed；
The wet feed is coated in by step 3) to carry out spontaneously drying solidification 12h on the steel shell of swinging sliding nozzle；Step 4) will be after step 3)
Swinging sliding nozzle toasted.
6. the swinging sliding nozzle according to claim 5 pouring technology of Anti-cracking castable, it is characterized in that: baking is by two
Stage composition, first stage are that swinging sliding nozzle is put at 200 DEG C to carry out baking and with 20 DEG C/min of speed increase to 500
DEG C, stop 5 minutes at 500 DEG C: second stage is that the swinging sliding nozzle under 500 degrees Celsius is directly placed into 1000 DEG C of oven,
And toast 1h.
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