CN108672693A - A kind of sealing structure and method using the submersed nozzle containing expanded graphite meterial - Google Patents
A kind of sealing structure and method using the submersed nozzle containing expanded graphite meterial Download PDFInfo
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- CN108672693A CN108672693A CN201810816906.9A CN201810816906A CN108672693A CN 108672693 A CN108672693 A CN 108672693A CN 201810816906 A CN201810816906 A CN 201810816906A CN 108672693 A CN108672693 A CN 108672693A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 46
- 239000010439 graphite Substances 0.000 title claims abstract description 46
- 238000007789 sealing Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 32
- 239000010959 steel Substances 0.000 claims abstract description 32
- 239000000463 material Substances 0.000 claims abstract description 20
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 77
- 239000000843 powder Substances 0.000 claims description 55
- 229910003460 diamond Inorganic materials 0.000 claims description 42
- 239000010432 diamond Substances 0.000 claims description 42
- 238000002156 mixing Methods 0.000 claims description 33
- 239000011347 resin Substances 0.000 claims description 30
- 229920005989 resin Polymers 0.000 claims description 30
- 238000003723 Smelting Methods 0.000 claims description 24
- 239000004411 aluminium Substances 0.000 claims description 18
- 229910052782 aluminium Inorganic materials 0.000 claims description 18
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 18
- 235000013312 flour Nutrition 0.000 claims description 16
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000004927 clay Substances 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 14
- 229910052710 silicon Inorganic materials 0.000 claims description 14
- 239000010703 silicon Substances 0.000 claims description 14
- 239000002994 raw material Substances 0.000 claims description 12
- 238000002360 preparation method Methods 0.000 claims description 11
- 238000007654 immersion Methods 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 8
- 239000003566 sealing material Substances 0.000 claims description 8
- 229910052580 B4C Inorganic materials 0.000 claims description 7
- INAHAJYZKVIDIZ-UHFFFAOYSA-N boron carbide Chemical compound B12B3B4C32B41 INAHAJYZKVIDIZ-UHFFFAOYSA-N 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000007670 refining Methods 0.000 claims description 4
- 235000011194 food seasoning agent Nutrition 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 238000002386 leaching Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 7
- 230000007246 mechanism Effects 0.000 abstract description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 4
- 239000002184 metal Substances 0.000 abstract description 4
- 230000006978 adaptation Effects 0.000 abstract 1
- 238000011049 filling Methods 0.000 description 18
- 238000007254 oxidation reaction Methods 0.000 description 9
- 230000008602 contraction Effects 0.000 description 8
- 230000003647 oxidation Effects 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 238000009749 continuous casting Methods 0.000 description 5
- 239000011819 refractory material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000003595 mist Substances 0.000 description 4
- 238000012856 packing Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 229910052786 argon Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000003434 inspiratory effect Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 206010061619 Deformity Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000010431 corundum Substances 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/502—Connection arrangements; Sealing means therefor
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
A kind of sealing structure and method using the submersed nozzle containing expanded graphite meterial of the present invention, the upper surface of the submersed nozzle is provided with annular groove, upper layer and lower layer ramming mass is filled in the annular groove, the upper surface of lower layer's ramming mass is less than 3 4mm of submersed nozzle upper surface.Upper layer and lower layer ramming mass, upper layer are the unexpansive ramming bed of material, and lower layer is the expansion ramming bed of material.The present invention is optimized by the shape to existing submersed nozzle, it is improved with production technology, make it in steel mill's applied at elevated temperature, adaptation is slidably installed the existing locking mode of mechanism, the special refractory of the expanded graphite containing certain proportion in lower layer's ramming mass of annular groove in submersed nozzle plane, utilize the performance of expanded graphite high-temperature expansion, submersed nozzle plane deformation when applied at elevated temperature is bent, it is effectively closed in the gap that centre position occurs, the sealing performance at the mouth of a river is improved, ensures the safe direct motion of Metal in Tundish cast.
Description
Technical field
The present invention relates to steel mill tundish immersion nozzle for continuously casting refractory materials more particularly to a kind of use to contain
The sealing structure and method of the submersed nozzle of expanded graphite meterial.
Background technology
Submersed nozzle be in continuous casting equipment be mounted on tundish bottom, upwards with ventilating filling pipe end for pouring box pair
It connects, is downwardly into crystallizer molten steel surface hereinafter, being used for molten steel continuously cast thimble tube refractory material.Its major function is anti-
The only secondary oxidation of molten steel and splashing during tundish beam avoids crystallizer protecting residue from being involved in molten steel, improves beam and is tying
Flow regime in brilliant device and heat flux distribution.The sheet billet continuous casting and bloom continuous casting of countries in the world all use this immersion at present
It is poured into a mould at the mouth of a river.Submersed nozzle is as shown in Figure 1.
One critical function of submersed nozzle, exactly prevents the secondary oxidation of molten steel during tundish beam, then
Molten steel is flowed by ventilating filling pipe end and submersed nozzle in crystallizer from tundish, in the process, changes formula water in addition
For mouth mechanism, ventilating filling pipe end and submersed nozzle are docked in such a way that plane is to plane being slidably installed mechanism, that
Can the seal quality between two planes, directly influence molten steel and aoxidized at this position.And actual conditions are, due to
The mechanism that is slidably installed has to from the point of view of safety is poured into a mould, in the four corners position of plane, with hydraulic way by upper plane
(sliding surface of ventilating filling pipe end) is firmly locked with lower plane (sliding surface 1 of submersed nozzle), is avoided in high speed pour steel
It falls off in the process.Ventilating filling pipe end and submersed nozzle belong to the functional refractory material of higher gears time, with metal material phase
Seemingly, there is certain elasticity, once the both ends high pressure locking of lower planes, often causes plane deformation to be bent, centre position goes out
Now certain gap, can lead to air-breathing, secondary oxidation of steel, resistance to material abrupt oxidization and damage, the safety for influencing pouring molten steel is raw
Production, steel quality.
And currently, as the refractory material producer for producing submersed nozzle, often the processing of the plate face at the mouth of a river is ground
Very fine smooth, plate face distortion size is even less than 0.03mm, but after installation locking, ventilating filling pipe end and immersion
Mouth of a river plane deformation, the general gap that can all generate 0.2-0.6mm, has been arrived during practical pouring molten steel between two planes,
Due to high temperature action, ventilating filling pipe end and submersed nozzle plane deformation can be further exacerbated by, even up to 1.0-2.0mm, sternly
When weight, air-breathing between ventilating filling pipe end and submersed nozzle plane can be still caused, causes secondary oxidation of steel, resistance to material drastically oxygen
Change and damages.As shown in Fig. 2, g is before locking, sliding surface gap 6<0.03mm；H is sliding surface gap 60.2-0.6mm after locking.
Therefore, existing common submersed nozzle production technology has not adapted to making for steel mill's high-quality steel grade production
With condition, it is necessary to optimize existing submersed nozzle production technology, improve close between ventilating filling pipe end and submersed nozzle plane
Sealing property.
Invention content
The purpose of the present invention is overcoming the deficiencies of existing technologies, provide a kind of using the immersion water containing expanded graphite meterial
The sealing structure and method of mouth, are optimized by the shape to existing submersed nozzle and production technology is improved, and make it
In steel mill's applied at elevated temperature, the existing locking mode of mechanism that is slidably installed is adapted to, it is pre- in the privileged sites of submersed nozzle plane
The special refractory for setting the expanded graphite containing certain proportion is soaked using the performance of expanded graphite high-temperature expansion when by applied at elevated temperature
Enter the plane deformation bending of the formula mouth of a river, the gap that centre position occurs effectively is closed, and the sealing performance at the mouth of a river is improved, in guarantee
Between packet pouring molten steel safe direct motion.
In order to achieve the above object, the present invention is realized using following technical scheme：
A kind of sealing structure using the submersed nozzle containing expanded graphite meterial, in the upper surface of the submersed nozzle
It is provided with annular groove, upper layer and lower layer ramming mass is filled in the annular groove, the upper surface of lower layer's ramming mass is less than
Submersed nozzle upper surface 3-4mm.
The upper layer and lower layer ramming mass, upper layer are the unexpansive ramming bed of material, and lower layer is the expansion ramming bed of material.
The width of the annular groove is 3-10mm, depth 7-12mm, radius 60-130mm.
A kind of sealing material of sealing structure using the submersed nozzle containing expanded graphite meterial, including ramming mass A, smash
Dnockout B, the ramming mass A are upper layer ramming mass, are formulated by the raw material of following parts by weight：98 white fused alumina aggregates or palm fibre
Corundum or 8-20 parts of 36 mesh of plate diamond spar, 98 white fused alumina aggregates or Brown Alundum or 8-20 parts of 80 mesh of plate diamond spar, 98 white fused aluminas are thin
20-35 parts of powder or 180 mesh of Brown Alundum or plate diamond spar, 10-20 parts of crystalline flake graphite, 0-6 parts of Reactive alumina, metallic aluminium
0-4 parts of powder, 0-2 parts of metallic silicon power, 0-1 parts of boron carbide, 0-2 parts of hard resin powder, 7-10 parts of liquid resin；
The ramming mass B is lower layer's ramming mass, is formulated by the raw material of following parts by weight：98 white fused alumina aggregates or
Brown Alundum or 8-20 parts of 36 mesh of plate diamond spar, 98 white fused alumina aggregates or Brown Alundum or 8-20 parts of 80 mesh of plate diamond spar, 98 white fused aluminas
Fine powder or 20-35 parts of 180 mesh of Brown Alundum or plate diamond spar, 3-10 parts of 320 mesh of flint clay powder, 5-10 parts of crystalline flake graphite, expansion stone
5-15 parts black, 0-6 parts of clay powder, 0-4 parts of metallic aluminium powder, 0-2 parts of metallic silicon power, 0-1 parts of Boratex, 0-2 parts of hard resin powder,
7-10 parts of liquid resin.
A kind of preparation method of the sealing material of sealing structure using the submersed nozzle containing expanded graphite meterial, specifically
Method is as follows：
1) preparation of ramming mass A：
A) by 180 mesh of 98 white fused alumina fine powders or Brown Alundum or plate diamond spar in ramming mass A, crystalline flake graphite, active oxidation
It is mixed to be uniformly added to double helix according to above-mentioned parts by weight for aluminium micro mist, metallic aluminium powder, metallic silicon power, boron carbide, hard resin powder
In conjunction machine, is packed for use after mixing 15-25min, be named as premixing flour A；
B) inside of high speed mixing smelting machine is first heated to 30-45 DEG C, then by ramming mass A 98 white fused alumina aggregates or palm fibre just
Beautiful or 36 mesh of plate diamond spar, 98 white fused alumina aggregates or Brown Alundum or 80 mesh of plate diamond spar are added at one time in high speed mixing smelting machine,
40-60 revs/min is kneaded 3-6 minutes, is then added at one time the liquid resin that temperature is 35-40 DEG C, and 80-120 revs/min mixed
Refining 5-10 minutes, premixing flour A is added at one time in high speed mixing smelting machine, and 80-120 revs/min is kneaded 5-10 minutes, temperature
It discharges at 48-52 DEG C；
2) preparation of ramming mass B：
A) by 180 mesh of 98 white fused alumina fine powders or Brown Alundum or plate diamond spar, 320 mesh of flint clay powder, the scale in ramming mass B
Graphite, expanded graphite, clay powder, metallic aluminium powder, metallic silicon power, Boratex, hard resin powder are unified according to above-mentioned parts by weight
It is added in double worm mixer, is packed for use after mixing 15-25min, be named as premixing flour B；
B) inside of high speed mixing smelting machine is first heated to 30-45 DEG C, then by ramming mass B 98 white fused alumina aggregates or palm fibre just
Beautiful or 36 mesh of plate diamond spar, 98 white fused alumina aggregates or Brown Alundum or 80 mesh raw material of plate diamond spar are added at one time high speed mixing smelting machine
In, 40-60 revs/min is kneaded 3-6 minute, is then added at one time temperature as 35-40 DEG C of liquid resin, 80-120 revs/min
Clock is kneaded 5-10 minutes, and premixing flour B is added at one time in high speed mixing smelting machine, and 80-120 revs/min is kneaded 5-10 minutes, temperature
It discharges when spending 48-52 DEG C.
A kind of application method of the sealing material of sealing structure using the submersed nozzle containing expanded graphite meterial, specifically
Method is as follows：
1) submersed nozzle for processing annular groove is fixed on workbench, the mouth of a river plane with annular groove to
On, it is first that ramming mass B is evenly laid out in annular groove, it is made firm by ramming with tool closely knit, ensures that the upper plane of last ramming mass B is less than
The plane 3-4mm of submersed nozzle；
2) it by the evenly laid out upper surfaces ramming mass B in annular groove ramming mass A, is made firm by ramming closely knit, ensured most with tool
The upper plane of ramming mass A is higher than the plane 2.0-2.5mm of submersed nozzle afterwards；It is finally placed into drying in electric seasoning kiln, from room
Temperature heats up 20-25 DEG C per hour to 200 DEG C, and 200 DEG C keep the temperature 4-5 hours, kiln discharge after cooling；
3) the ramming mass A higher than submersed nozzle plane is ground off；
4) in steel mill, reach the standard grade baking 1-2 hours, 500-550 DEG C of temperature before installing and using.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention utilizes different refractory materials, the contraction occurred in different temperatures section and swelling, by being received to it
Ramming mass A, the ramming mass B of different performance are developed in the calculating of contracting coefficient and the coefficient of expansion, and in the plane of submersed nozzle
It is pre-designed and processes annular groove, then fill ramming mass B in annular groove lower layer respectively, upper layer fills ramming mass A, every layer
Make closely knit, dry, milling surface treatment, finished product packing firm by ramming.
Under the conditions of applied at elevated temperature, the ramming mass B volume expansions in annular groove push up ramming mass A, make the product
Protrusion submersed nozzle plane 0.6-1.2mm, one week of endoporus at the mouth of a river forms one of ring packing structure, will be ventilative on
The gap that the mouth of a river and submersed nozzle plane are generated due to high temperature deformation effectively blocks, and avoids the generation of inspiratory phenomenon, from
And ensure smoothly completing for Metal in Tundish cast.
Description of the drawings
Fig. 1 is immersion type water nozzle structure schematic diagram.
Fig. 2 is submersed nozzle sliding facial disfigurement air-breathing schematic diagram.
Fig. 3 is the vertical view of submersed nozzle sliding surface annular groove.
Fig. 4 is the front view of submersed nozzle sliding surface annular groove.
Fig. 5 is the filling schematic diagram of ramming mass A, ramming mass B in submersed nozzle plate face annular groove.
Fig. 6 is the submersed nozzle sliding surface using renderings using annular groove.
In figure：It is wrapped between the mouth of a river, 6- sliding surfaces in 1- sliding surfaces, 2- submersed nozzles ontology, 3- slag lines, 4- steel flow ports, 5-
Gap, 7- submersed nozzles, 8- annular grooves, 9- plate faces material, 10- box hats, 11- steel outlet holes, the 12- expansion rammings bed of material, 13- are non-swollen
The swollen ramming bed of material, 14- confined spaces.
Specific implementation mode
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings：
See Fig. 3-Fig. 6, a kind of sealing structure using the submersed nozzle containing expanded graphite meterial, in the immersion water
The upper surface of mouth 7 is provided with annular groove 8, and upper layer and lower layer ramming mass, lower layer's ramming mass are filled in the annular groove 8
Upper surface be less than 7 upper surface 3-4mm of submersed nozzle.
The upper layer and lower layer ramming mass, upper layer are the unexpansive ramming bed of material 13, and lower layer is the expansion ramming bed of material 12.
See Fig. 3, Fig. 4, the width of the annular groove 8 is 3-10mm, and depth 7-12mm, radius R are 60-130mm.
A kind of sealing material of sealing structure using the submersed nozzle containing expanded graphite meterial, including ramming mass A, smash
Dnockout B, the ramming mass A are upper layer ramming mass (the unexpansive ramming bed of material 13), be prepared by the raw material of following parts by weight and
At：98 white fused alumina aggregates or 8-20 parts of 36 mesh of Brown Alundum or plate diamond spar, 98 white fused alumina aggregates or Brown Alundum or plate diamond spar 80
8-20 parts of mesh, 98 white fused alumina fine powders or Brown Alundum or 20-35 parts of 180 mesh of plate diamond spar, 10-20 parts of crystalline flake graphite, active oxidation
0-6 parts of aluminium micro mist, 0-4 parts of metallic aluminium powder, 0-2 parts of metallic silicon power, 0-1 parts of boron carbide, 0-2 parts of hard resin powder, liquid resin
7-10 parts；
The ramming mass B is lower layer's ramming mass (expansion ramming the bed of material 12), be prepared by the raw material of following parts by weight and
At：98 white fused alumina aggregates or 8-20 parts of 36 mesh of Brown Alundum or plate diamond spar, 98 white fused alumina aggregates or Brown Alundum or plate diamond spar 80
8-20 parts of mesh, 98 white fused alumina fine powders or Brown Alundum or 20-35 parts of 180 mesh of plate diamond spar, 3-10 parts of 320 mesh of flint clay powder, scale
5-10 parts of graphite, 5-15 parts of expanded graphite, 0-6 parts of clay powder, 0-4 parts of metallic aluminium powder, 0-2 parts of metallic silicon power, Boratex 0-1
Part, 0-2 parts of hard resin powder, 7-10 parts of liquid resin.
A kind of preparation method of the sealing material of sealing structure using the submersed nozzle containing expanded graphite meterial, specifically
Method is as follows：
1) preparation of ramming mass A：
A) by 180 mesh of 98 white fused alumina fine powders or Brown Alundum or plate diamond spar in ramming mass A, crystalline flake graphite, active oxidation
It is mixed to be uniformly added to double helix according to above-mentioned parts by weight for aluminium micro mist, metallic aluminium powder, metallic silicon power, boron carbide, hard resin powder
In conjunction machine, is packed for use after mixing 15-25min, be named as premixing flour A；
B) inside of high speed mixing smelting machine is first heated to 30-45 DEG C, then by ramming mass A 98 white fused alumina aggregates or palm fibre just
Beautiful or 36 mesh of plate diamond spar, 98 white fused alumina aggregates or Brown Alundum or 80 mesh of plate diamond spar are added at one time in high speed mixing smelting machine,
40-60 revs/min is kneaded 3-6 minutes, is then added at one time the liquid resin that temperature is 35-40 DEG C, and 80-120 revs/min mixed
Refining 5-10 minutes, after allowing aggregate surface uniformly to overwork resin, premixing flour A is added at one time in high speed mixing smelting machine, 80-120
Rev/min be kneaded 5-10 minute, be mixed when pug, 48-52 DEG C of temperature when discharge, pack is for use, marks ramming mass A.
2) preparation of ramming mass B：
A) by 180 mesh of 98 white fused alumina fine powders or Brown Alundum or plate diamond spar, 320 mesh of flint clay powder, the scale in ramming mass B
Graphite, expanded graphite, clay powder, metallic aluminium powder, metallic silicon power, Boratex, hard resin powder are unified according to above-mentioned parts by weight
It is added in double worm mixer, is packed for use after mixing 15-25min, be named as premixing flour B；
B) inside of high speed mixing smelting machine is first heated to 30-45 DEG C, then by ramming mass B 98 white fused alumina aggregates or palm fibre just
Beautiful or 36 mesh of plate diamond spar, 98 white fused alumina aggregates or Brown Alundum or 80 mesh raw material of plate diamond spar are added at one time high speed mixing smelting machine
In, 40-60 revs/min is kneaded 3-6 minute, is then added at one time temperature as 35-40 DEG C of liquid resin, 80-120 revs/min
Clock is kneaded 5-10 minutes, after allowing aggregate surface uniformly to overwork resin, premixing flour B is added at one time in high speed mixing smelting machine, 80-
120 revs/min are kneaded 5-10 minute, be mixed when pug, 48-52 DEG C of temperature when discharge, pack is for use, marks ramming mass B.
See Fig. 5, a kind of user of the sealing material of sealing structure using the submersed nozzle containing expanded graphite meterial
Method, the specific method is as follows：
1) will be qualified through sorting, and the submersed nozzle 7 for processing annular groove 8 is fixed on special workbench, band
The mouth of a river plane of annular groove 8 is upward, first that ramming mass B is evenly laid out in annular groove 8, makes closely knit, guarantee firm by ramming with tool
The upper plane of last ramming mass B (the expansion ramming bed of material 12) is less than the plane 3-4mm of submersed nozzle 7；The filling of ramming mass B is deep
Degree is 4-8mm.
2) it by the evenly laid out upper surfaces ramming mass B in annular groove 8 ramming mass A, is made firm by ramming closely knit, ensured most with tool
The upper plane of ramming mass A (the unexpansive ramming bed of material 13) is higher than the plane 2.0-2.5mm of submersed nozzle 7 afterwards；Finally it is placed into
It is dry in electric seasoning kiln, it from room temperature to 200 DEG C, heats up 20-25 DEG C per hour, 200 DEG C keep the temperature 4-5 hours, kiln discharge after cooling；
3) it by the submersed nozzle 7 of cooling kiln discharge, is processed on the grinding machine of milling face, smashing higher than 7 plane of submersed nozzle
Dnockout A is ground off；Ensure that 7 plane integral smoothness of submersed nozzle meets the requirements, can be packed less than 0.03mm, cases, be sent to
Steel mill uses.
4) the bright ramming mass filled in annular groove 8 of this law is divided into two kinds, and ramming mass B is filled in bottom, 250-600
Existing expansion during DEG C, and have contraction, the two offsets, and embodies volume and is basically unchanged.And it is existing during 600-1000 DEG C
Expansion, and have contraction, but expansion is far longer than contraction, embodies ramming mass B volumes and gradually expands；Ramming mass A is filled in ramming
, there is some strength on the upper layer for expecting B, under the expanding against of ramming mass B, moves upwards, and blocks ventilating filling pipe end and immersion water
The gap of mouth plane.
In steel mill, it is 500-550 DEG C that immersion filling pipe end before installing and using of reaching the standard grade, which needs baking 1-2 hours, temperature,.At this
At a temperature of, the expanded graphite in ramming mass B has certain expansion, but due to the contraction of unclassified stores, the expansion is basic
It is cancelled, submersed nozzle plane keeps original flatness substantially, does not influence to install.
Under conditions of normal use, the temperature of submersed nozzle plane can reach 900-1000 DEG C, expand stone at this time
Ink continues to expand, and is far longer than the contraction of unclassified stores, the ramming mass B volume expansions being embodied in annular groove 8, upwards
Ramming mass A is pushed, is allowed to protrude submersed nozzle plane 0.6-1.2mm, one week of endoporus at the mouth of a river, forms one of ring packing
The gap that ventilating filling pipe end and submersed nozzle plane are generated due to high temperature deformation is effectively blocked, avoids air-breathing by structure
The generation of phenomenon, to ensure smoothly completing for Metal in Tundish cast.Design sketch is shown in Fig. 6.
Each raw material in ramming mass A and ramming mass B, main physical and chemical index or parameter are shown in Table 1
Table 1：The main physical and chemical index of ramming mass raw material or parameter
Embodiment 1：
By taking 912 type submersed nozzles of certain 2300 conticaster of iron company as an example, to ensure the quality of continuous casting steel, steel mill
It claims, i.e. the plate face contact site of both submersed nozzle and ventilating filling pipe end for pouring box, to combine closely, to reach close
Envelope, argon flow amount is 5v/h between plate, and back pressure is higher than 0.2Bar between plate, and the production technology of existing submersed nozzle cannot be satisfied this
The requirement of sample.
The present invention utilizes the characteristic of expanded graphite high-temperature expansion, by both submersed nozzle and ventilating filling pipe end for pouring box
Plate face, the gap generated at high temperature are closed.Concrete measure is as follows：
1) according to the size of the specification of submersed nozzle sliding surface 1, in the upper surface of submersed nozzle finished product, processing
Go out width 7mm, the annular groove 8 of depth 9mm, radius 110mm.
2) production groove filling ramming mass A, ramming mass B, two kinds of ramming mass proportionings are shown in Table 2：
Table 2：1 ramming material formula of embodiment
Specifically production and construction technological process are as follows for two kinds of ramming masses：
1) preparation of ramming mass A：
A) by 180 mesh of 98 white fused alumina fine powders or Brown Alundum or plate diamond spar in ramming mass A, crystalline flake graphite, active oxidation
Aluminium micro mist, metallic aluminium powder, metallic silicon power, boron carbide are uniformly added in double worm mixer according to above-mentioned parts by weight, mixing
It is packed for use after 20min, is named as premixing flour A；
B) inside of high speed mixing smelting machine is first heated to 30-45 DEG C, then by ramming mass A 98 white fused alumina aggregates or palm fibre just
Beautiful or 36 mesh of plate diamond spar, 98 white fused alumina aggregates or Brown Alundum or 80 mesh of plate diamond spar are added at one time in high speed mixing smelting machine,
40-60 revs/min is kneaded 5-6 minutes, is then added at one time the liquid resin that temperature is 35-40 DEG C, and 80-120 revs/min mixed
Refining 8-10 minutes, after allowing aggregate surface uniformly to overwork resin, premixing flour A is added at one time in high speed mixing smelting machine, 80-120
Rev/min be kneaded 8-10 minute, be mixed when pug, temperature 50 C when discharge, pack is for use, marks ramming mass A.
2) preparation of ramming mass B：
A) by 180 mesh of 98 white fused alumina fine powders or Brown Alundum or plate diamond spar, 320 mesh of flint clay powder, the scale in ramming mass B
Graphite, expanded graphite, clay powder, metallic aluminium powder, metallic silicon power, Boratex are uniformly added to double spiral shells according to above-mentioned parts by weight
It revolves in mixing machine, is packed for use after mixing 20min, be named as premixing flour B；
B) inside of high speed mixing smelting machine is first heated to 30-45 DEG C, then by ramming mass B 98 white fused alumina aggregates or palm fibre just
Beautiful or 36 mesh of plate diamond spar, 98 white fused alumina aggregates or Brown Alundum or 80 mesh raw material of plate diamond spar are added at one time high speed mixing smelting machine
In, 40-60 revs/min is kneaded 5-6 minute, is then added at one time temperature as 35-40 DEG C of liquid resin, 80-120 revs/min
Clock is kneaded 8-10 minutes, after allowing aggregate surface uniformly to overwork resin, premixing flour B is added at one time in high speed mixing smelting machine, 80-
120 revs/min are kneaded 8-10 minute, be mixed when pug, temperature 50 C when discharge, pack is for use, marks ramming mass B.
3) will be qualified through sorting, and the submersed nozzle for processing annular groove is fixed on special workbench, with recessed
The mouth of a river plane of slot is upward, weighs a certain amount of ramming mass B first, evenly laid out in groove, makes closely knit, guarantee firm by ramming with tool
The upper plane of last ramming mass B is less than the plane 4mm of submersed nozzle；Then a certain amount of ramming mass A is weighed, it is uniformly flat
The upper surfaces ramming mass B in annular groove are layered on, are made firm by ramming with tool closely knit, ensure the upper plane of last ramming mass A higher than immersing
The plane 2mm at the formula mouth of a river or so；It is finally placed into drying in a dry kiln, from room temperature to 200 DEG C, heat up 20- per hour
25 DEG C, 200 degree keep the temperature 4-5 hours, can kiln discharge after cooling.
4) it by the submersed nozzle of cooling kiln discharge, is processed on the grinding machine of milling face, the ramming higher than submersed nozzle plane
Material A is ground off, and is ensured that submersed nozzle plane integral smoothness meets the requirements, can be packed less than 0.03mm, cases, be sent to steel mill
It uses.
In steel mill, reaching the standard grade needs baking 2 hours before installing and using, 500 DEG C or so of temperature, the expanded graphite in ramming mass B exists
This temperature has certain expansion, but due to the contraction of unclassified stores, which is cancelled substantially, submersed nozzle plane
Substantially original flatness is kept, does not influence to install.Under conditions of normal use, the temperature of submersed nozzle plane can reach
To 900-1000 DEG C, expanded graphite continues to expand at this time, is far longer than the contraction of unclassified stores, is embodied in annular groove
Ramming mass B volume expansions, push up ramming mass A, be allowed to protrude submersed nozzle plane 0.8-1.0mm, in mouth of a river endoporus
One week, formed one of ring packing structure, ventilating filling pipe end and submersed nozzle plane are generated due to high temperature deformation
Gap effectively blocks, and avoids the generation of inspiratory phenomenon, to ensure smoothly completing for Metal in Tundish cast.
Between the 1-2 months in 2018, in certain 2300 conticaster of iron company, the 912 type submersed nozzles 20 of the present embodiment are used
Branch, 118 tank of molten steel, between plate under conditions of argon flow amount 5v/h, back pressure value is shown in Table 3 between plate：
Back pressure value between 3 embodiment of table, 1 plate
And the same period, common submersed nozzle is between plate under conditions of argon flow amount 5v/h, and back pressure value is less than between plate
0.1Bar, it can be seen that, submersed nozzle of the invention meets the technological requirement of the high-quality molten steel of steel mill's continuous casting well.At present should
Kind submersed nozzle is being promoted.
Claims (6)
1. a kind of sealing structure using the submersed nozzle containing expanded graphite meterial, which is characterized in that in the immersion water
The upper surface of mouth is provided with annular groove, and upper layer and lower layer ramming mass is filled in the annular groove, lower layer's ramming mass
Upper surface is less than submersed nozzle upper surface 3-4mm.
2. a kind of sealing structure using the submersed nozzle containing expanded graphite meterial according to claim 1, feature
It is, the upper layer and lower layer ramming mass, upper layer is the unexpansive ramming bed of material, and lower layer is the expansion ramming bed of material.
3. a kind of sealing structure using the submersed nozzle containing expanded graphite meterial according to claim 1, feature
It is, the width of the annular groove is 3-10mm, depth 7-12mm, radius 60-130mm.
4. a kind of sealing of the sealing structure as claimed in claim 1 or 2 using the submersed nozzle containing expanded graphite meterial
Material, which is characterized in that including ramming mass A, ramming mass B, the ramming mass A is upper layer ramming mass, is by following parts by weight
Raw material be formulated：98 white fused alumina aggregates or 8-20 parts of 36 mesh of Brown Alundum or plate diamond spar, 98 white fused alumina aggregates or Brown Alundum
Or 8-20 parts of 80 mesh of plate diamond spar, 98 white fused alumina fine powders or Brown Alundum or 20-35 parts of 180 mesh of plate diamond spar, crystalline flake graphite 10-20
Part, 0-6 parts of Reactive alumina, 0-4 parts of metallic aluminium powder, 0-2 parts of metallic silicon power, 0-1 parts of boron carbide, hard resin powder 0-2
Part, 7-10 parts of liquid resin；
The ramming mass B is lower layer's ramming mass, is formulated by the raw material of following parts by weight：98 white fused alumina aggregates or palm fibre are just
Beautiful or 8-20 parts of 36 mesh of plate diamond spar, 98 white fused alumina aggregates or Brown Alundum or 8-20 parts of 80 mesh of plate diamond spar, 98 white fused alumina fine powders
Or Brown Alundum or 20-35 parts of 180 mesh of plate diamond spar, 3-10 parts of 320 mesh of flint clay powder, 5-10 parts of crystalline flake graphite, expanded graphite 5-
15 parts, 0-6 parts of clay powder, 0-4 parts of metallic aluminium powder, 0-2 parts of metallic silicon power, 0-1 parts of Boratex, 0-2 parts of hard resin powder, liquid
7-10 parts of resin.
5. a kind of sealing material of the sealing structure as claimed in claim 3 using the submersed nozzle containing expanded graphite meterial
Preparation method, which is characterized in that the specific method is as follows：
1) preparation of ramming mass A：
A) 180 mesh of 98 white fused alumina fine powders or Brown Alundum or plate diamond spar, crystalline flake graphite, the activated alumina in ramming mass A is micro-
Powder, metallic aluminium powder, metallic silicon power, boron carbide, hard resin powder are uniformly added to double worm mixer according to above-mentioned parts by weight
In, it is packed for use after mixing 15-25min, is named as premixing flour A；
B) inside of high speed mixing smelting machine is first heated to 30-45 DEG C, then by ramming mass A 98 white fused alumina aggregates or Brown Alundum or
36 mesh of plate diamond spar, 98 white fused alumina aggregates or Brown Alundum or 80 mesh of plate diamond spar are added at one time in high speed mixing smelting machine, 40-60
It rev/min is kneaded 3-6 minute, it is 35-40 DEG C of liquid resin to be then added at one time temperature, and 80-120 revs/min is kneaded 5-
10 minutes, premixing flour A is added at one time in high speed mixing smelting machine, 80-120 revs/min is kneaded 5-10 minutes, temperature 48-52
DEG C when discharge；
2) preparation of ramming mass B：
A) by 180 mesh of 98 white fused alumina fine powders or Brown Alundum or plate diamond spar, 320 mesh of flint clay powder, the scale stone in ramming mass B
Ink, expanded graphite, clay powder, metallic aluminium powder, metallic silicon power, Boratex, hard resin powder add according to above-mentioned parts by weight are unified
Enter into double worm mixer, is packed for use after mixing 15-25min, be named as premixing flour B；
B) inside of high speed mixing smelting machine is first heated to 30-45 DEG C, then by ramming mass B 98 white fused alumina aggregates or Brown Alundum or
36 mesh of plate diamond spar, 98 white fused alumina aggregates or Brown Alundum or 80 mesh raw material of plate diamond spar are added at one time in high speed mixing smelting machine,
40-60 revs/min is kneaded 3-6 minutes, is then added at one time the liquid resin that temperature is 35-40 DEG C, and 80-120 revs/min mixed
Refining 5-10 minutes, premixing flour B is added at one time in high speed mixing smelting machine, and 80-120 revs/min is kneaded 5-10 minutes, temperature
It discharges at 48-52 DEG C.
6. a kind of sealing material of the sealing structure as claimed in claim 3 using the submersed nozzle containing expanded graphite meterial
Application method, which is characterized in that the specific method is as follows：
1) submersed nozzle for processing annular groove being fixed on workbench, the mouth of a river plane with annular groove is upward,
It is first that ramming mass B is evenly laid out in annular groove, it is made firm by ramming with tool closely knit, ensures the upper plane of last ramming mass B less than leaching
Enter the plane 3-4mm at the formula mouth of a river；
2) by the evenly laid out upper surfaces ramming mass B in annular groove ramming mass A, made firm by ramming with tool closely knit, guarantee is finally smash
The upper plane of dnockout A is higher than the plane 2.0-2.5mm of submersed nozzle；Finally be placed into electric seasoning kiln it is dry, from room temperature to
It 200 DEG C, heats up 20-25 DEG C per hour, 200 DEG C keep the temperature 4-5 hours, kiln discharge after cooling；
3) the ramming mass A higher than submersed nozzle plane is ground off；
4) in steel mill, reach the standard grade baking 1-2 hours, 500-550 DEG C of temperature before installing and using.
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| CN201810816906.9A CN108672693B (en) | 2018-07-24 | 2018-07-24 | Sealing structure and method for submerged nozzle with expanded graphite material |
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| CN201810816906.9A CN108672693B (en) | 2018-07-24 | 2018-07-24 | Sealing structure and method for submerged nozzle with expanded graphite material |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109454222A (en) * | 2018-12-07 | 2019-03-12 | 鞍钢股份有限公司 | A method of preventing secondary oxidation of steel |
| CN110606757A (en) * | 2019-09-23 | 2019-12-24 | 长兴兴鹰新型耐火建材有限公司 | Sulfur-alkali corrosion resistant wear-resistant castable for sludge incineration kiln and preparation process thereof |
| CN112876264A (en) * | 2021-01-13 | 2021-06-01 | 广东韶钢松山股份有限公司 | Application method of continuous casting machine immersion type water gap sealing material |
| CN113666760A (en) * | 2021-09-27 | 2021-11-19 | 江西友致高温陶瓷有限公司 | Device for sealing sliding surface of submerged nozzle and preparation method thereof |
| CN114213111A (en) * | 2021-12-30 | 2022-03-22 | 鞍山市和丰耐火材料有限公司 | Aluminum-carbon soaking water inlet for accidents and preparation method |
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| CN110606757B (en) * | 2019-09-23 | 2022-02-25 | 长兴兴鹰新型耐火建材有限公司 | Sulfur-alkali corrosion resistant wear-resistant castable for sludge incineration kiln and preparation process thereof |
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| CN113666760A (en) * | 2021-09-27 | 2021-11-19 | 江西友致高温陶瓷有限公司 | Device for sealing sliding surface of submerged nozzle and preparation method thereof |
| CN113666760B (en) * | 2021-09-27 | 2022-12-13 | 江西友致高温陶瓷有限公司 | Device for sealing sliding surface of submerged nozzle and preparation method thereof |
| CN114213111A (en) * | 2021-12-30 | 2022-03-22 | 鞍山市和丰耐火材料有限公司 | Aluminum-carbon soaking water inlet for accidents and preparation method |
| CN114213111B (en) * | 2021-12-30 | 2023-08-11 | 鞍山市和丰耐火材料有限公司 | Aluminum-carbon immersion nozzle for accidents and preparation method |
| CN114315391A (en) * | 2022-01-17 | 2022-04-12 | 浙江自立高温科技股份有限公司 | Expandable magnesium-carbon fire clay and preparation method and application thereof |
| CN114315391B (en) * | 2022-01-17 | 2023-03-03 | 浙江自立高温科技股份有限公司 | Expandable magnesium-carbon fire clay and preparation method and application thereof |
| CN116354723A (en) * | 2023-03-30 | 2023-06-30 | 鞍山市和丰耐火材料有限公司 | Sealing material between submerged nozzle plates and preparation method thereof |
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