CN208495790U - A kind of sealing structure using the submersed nozzle containing expanded graphite meterial - Google Patents
A kind of sealing structure using the submersed nozzle containing expanded graphite meterial Download PDFInfo
- Publication number
- CN208495790U CN208495790U CN201821172275.3U CN201821172275U CN208495790U CN 208495790 U CN208495790 U CN 208495790U CN 201821172275 U CN201821172275 U CN 201821172275U CN 208495790 U CN208495790 U CN 208495790U
- Authority
- CN
- China
- Prior art keywords
- submersed nozzle
- ramming
- ramming mass
- expanded graphite
- annular groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
A kind of sealing structure using the submersed nozzle containing expanded graphite meterial of the utility model, 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 lower than submersed nozzle upper surface 3-4mm.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 utility model 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 the 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 middle position occurs, the sealing performance at the mouth of a river is improved, guarantees the safe direct motion of Metal in Tundish casting.
Description
Technical field
The utility model relates to steel mill tundish immersion nozzle for continuously casting refractory materials more particularly to one kind to adopt
With the sealing structure of the submersed nozzle containing expanded graphite meterial.
Background technique
Submersed nozzle is that tundish bottom is mounted in continuous casting equipment, 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 casting 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 and heat flux distribution in brilliant device.The sheet billet continuous casting and bloom continuous casting of countries in the world all use this immersion at present
The mouth of a river is poured.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 into crystallizer from tundish by ventilating filling pipe end and submersed nozzle, 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
Airtightness quality between two planes, can directly influence molten steel be oxidized at this position.And actual conditions are, due to
The mechanism that is slidably installed has to from the point of view of being poured from safety, 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 of lower planes is locked, often will cause plane deformation bending, middle position goes out
Now certain gap, will lead to air-breathing, secondary oxidation of steel, resistance to material abrupt oxidization and damage, the safety for influencing pouring molten steel is raw
It produces, steel quality.
And currently, often the plate face processing at the mouth of a river is ground as the refractory material producer for producing submersed nozzle
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 generally can all generate the gap of 0.2-0.6mm between two planes, arrive during practical pouring molten steel,
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 still will cause, cause secondary oxidation of steel, resistance to material sharply oxygen
Change and damages.As shown in Fig. 2, g is 6 < 0.03mm of sliding surface gap before locking；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.
Utility model content
The purpose of the utility model is to overcome the defects of the prior art, provide a kind of using the immersion containing expanded graphite meterial
The sealing structure at the formula mouth of a river, optimized by the shape to existing submersed nozzle and production technology improve, make its
When steel mill's applied at elevated temperature, the existing locking mode of mechanism that is slidably installed is adapted to, it is preset in the privileged sites of submersed nozzle plane
The special refractory of the expanded graphite containing certain proportion is immersed when by applied at elevated temperature using the performance of expanded graphite high-temperature expansion
The bending of formula mouth of a river plane deformation, the gap that middle position occurs effectively are closed, and the sealing performance at the mouth of a river is improved, and are guaranteed intermediate
The safe direct motion of packet pouring molten steel.
In order to achieve the above object, the utility model is implemented with the following technical solutions:
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 lower 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.
Compared with prior art, the utility model has the beneficial effects that
The utility model utilizes different refractory materials, the contraction of appearance and swelling in different temperatures section, by right
Ramming mass A, the ramming mass B of different performance are developed in the calculating of its constriction coefficient and the coefficient of expansion, and in the flat of submersed nozzle
It being pre-designed on face and processes annular groove, then fill ramming mass B in annular groove lower layer respectively, upper layer fills ramming mass A,
Every layer is made firm by ramming closely knit, dry, milling surface treatment, finished product packing.
The product is under the conditions of applied at elevated temperature, and ramming mass B volume expansion in annular groove pushes up ramming mass A, makes
Protrusion submersed nozzle plane 0.6-1.2mm, one week of inner hole 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 guarantee smoothly completing for Metal in Tundish casting.
Detailed description of the invention
Fig. 1 is immersion type water nozzle structure schematic diagram.
Fig. 2 is submersed nozzle sliding surface deformation air-breathing schematic diagram.
Fig. 3 is the top view of submersed nozzle sliding surface annular groove.
Fig. 4 is the main 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: 1- sliding surface, 3- slag line, 4- steel flow port, is wrapped between the mouth of a river, 6- sliding surface in 5- 2- submersed nozzle ontology
Gap, 7- submersed nozzle, 8- annular groove, 9- plate face material, 10- steel shell, 11- steel outlet hole, the 12- expansion ramming bed of material, 13- are non-swollen
The swollen ramming bed of material, 14- confined space.
Specific embodiment
Specific embodiment of the present utility model is described further with reference to the accompanying drawing:
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 lower 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 that Fig. 3, Fig. 4, the width of the annular groove 8 are 3-10mm, depth 7-12mm, radius R are 60-130mm.
A kind of sealing material of the 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 the ramming 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 the 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, the crystalline flake graphite, active oxidation in ramming mass A
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 mixing 3-6 minutes, being then added at one time temperature is 35-40 DEG C of liquid resin, and 80-120 revs/min is 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 discharging, pack is stand-by, mark 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, 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 mixing 3-6 minutes, being then added at one time temperature is 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 mixing 5-10 minutes, be mixed when pug, 48-52 DEG C of temperature when discharging, pack is stand-by, marks ramming mass B.
See Fig. 5, a kind of user of the sealing material of the sealing structure using the submersed nozzle containing expanded graphite meterial
Method, the specific method is as follows:
1) it is qualified to be sorted, and the submersed nozzle 7 for processing annular groove 8 is fixed on dedicated 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 lower 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 surface ramming mass B in annular groove 8 ramming mass A, is made firm by ramming closely knit, guaranteed 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, from room temperature to 200 DEG C, heat up 20-25 DEG C per hour, 200 DEG C heat preservation 4-5 hours, kiln discharge after cooling down；
3) it by the submersed nozzle 7 of cooling kiln discharge, is processed on milling face grinding machine, smashing higher than 7 plane of submersed nozzle
Dnockout A is ground off；Guarantee 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 volume 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 online install and use before immersion filling pipe end need to toast 1-2 hour, temperature is 500-550 DEG C.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 expansion 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 inner hole 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 guarantee smoothly completing for Metal in Tundish casting.Effect picture 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, for the quality for guaranteeing 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
It seals, argon flow is 5v/h between plate, and back pressure is higher than 0.2Bar between plate, and the production technology of existing submersed nozzle is unable to satisfy this
The requirement of sample.
The utility model utilizes the characteristic of expanded graphite high-temperature expansion, by submersed nozzle and ventilating filling pipe end for pouring box two
The plate face of person, 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
The annular groove 8 of width 7mm out, depth 9mm, radius 110mm.
2) production groove filling ramming mass A, ramming mass B, two kinds of ramming mass proportions are shown in Table 2:
Table 2: 1 ramming material formula of embodiment
Two kinds of ramming masses specifically produce and construction technological process 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, the crystalline flake graphite, active oxidation in ramming mass A
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 mixing 5-6 minutes, being then added at one time temperature is 35-40 DEG C of liquid resin, and 80-120 revs/min is 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 discharging, pack is stand-by, mark 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, 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 mixing 5-6 minutes, being then added at one time temperature is 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 mixing 8-10 minutes, be mixed when pug, temperature 50 C when discharging, pack is stand-by, marks ramming mass B.
3) it is qualified to be sorted, and the submersed nozzle for processing annular groove is fixed on dedicated 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 lower than the plane 4mm of submersed nozzle；Then a certain amount of ramming mass A is weighed, it is uniformly flat
Be layered on the upper surface ramming mass B in annular groove, made firm by ramming with tool it is closely knit, guarantee last ramming mass A upper plane be higher than immerse
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 heat preservation 4-5 hours, can kiln discharge after cooling.
4) it by the submersed nozzle of cooling kiln discharge, is processed on milling face grinding machine, the ramming for being higher than submersed nozzle plane
Material A is ground off, and is guaranteed 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, it is online install and use before need baking 2 hours, 500 DEG C of temperature or so, 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 expansion, push up ramming mass A, be allowed to protrude submersed nozzle plane 0.8-1.0mm, in mouth of a river inner hole
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 guarantee smoothly completing for Metal in Tundish casting.
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 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 5v/h, and back pressure value is lower than between plate
0.1Bar, it can be seen that, the submersed nozzle of the utility model meets the technique requirement of the high-quality molten steel of steel mill's continuous casting well.Mesh
Preceding this kind of submersed nozzle is being promoted.
Claims (3)
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 lower 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821172275.3U CN208495790U (en) | 2018-07-24 | 2018-07-24 | A kind of sealing structure using the submersed nozzle containing expanded graphite meterial |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821172275.3U CN208495790U (en) | 2018-07-24 | 2018-07-24 | A kind of sealing structure using the submersed nozzle containing expanded graphite meterial |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208495790U true CN208495790U (en) | 2019-02-15 |
Family
ID=65290735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821172275.3U Active CN208495790U (en) | 2018-07-24 | 2018-07-24 | A kind of sealing structure using the submersed nozzle containing expanded graphite meterial |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208495790U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672693A (en) * | 2018-07-24 | 2018-10-19 | 鞍山市和丰耐火材料有限公司 | A kind of sealing structure and method using the submersed nozzle containing expanded graphite meterial |
-
2018
- 2018-07-24 CN CN201821172275.3U patent/CN208495790U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672693A (en) * | 2018-07-24 | 2018-10-19 | 鞍山市和丰耐火材料有限公司 | A kind of sealing structure and method using the submersed nozzle containing expanded graphite meterial |
| CN108672693B (en) * | 2018-07-24 | 2024-02-13 | 鞍山市和丰耐火材料有限公司 | Sealing structure and method for submerged nozzle with expanded graphite material |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108672693A (en) | A kind of sealing structure and method using the submersed nozzle containing expanded graphite meterial | |
| CN104148625B (en) | A kind of preparation method of refining chromium matter stuffing sand | |
| CN208495790U (en) | A kind of sealing structure using the submersed nozzle containing expanded graphite meterial | |
| CN104493150B (en) | A kind of alumina-silica drainage agent and preparation method thereof | |
| CN104674108A (en) | Tungsten carbide ceramic particle/high-chromium cast iron composite wear-resistant lining plate and manufacturing method thereof | |
| CN102603322A (en) | Unfired aluminum-zirconium-carbon slide plate added with silica micro-powder and method for preparing unfired aluminum-zirconium-carbon slide plate | |
| CN102335738A (en) | Composite submerged nozzle and manufacturing method thereof | |
| CN107695285A (en) | The sand mulling craft of jacket core in diesel engine cylinder cover cast blank | |
| CN104177108A (en) | Continuous-casting flow-control refractory material and application thereof | |
| CN100475387C (en) | White olivine ladle draining sand and method for preparing the same | |
| CN103804004B (en) | A kind of high-Mg low-Si stuffing sand used for ultra-low-carbon steel | |
| CN106220206A (en) | A kind of castable | |
| CN106631050A (en) | Cleaning-free air brick with uniform structure and manufacturing method thereof | |
| CN104646656B (en) | A kind of middle water containing opening preparation method | |
| CN106521297A (en) | Method for reducing internal defects of high-nickel austenite ductile iron turbine shell | |
| CN104193353A (en) | Plate-shaped corundum ladle filler sand and preparation method thereof | |
| CN112500135A (en) | Magnesium-calcium tundish dry working lining material and preparation method thereof | |
| CN116003108B (en) | Preparation method of forming crucible with desulfurization and rare earth element addition functions | |
| CN211248314U (en) | Continuous casting tundish upper nozzle molten steel plugging tool | |
| CN109825736A (en) | A kind of Al-Ti-B refiner and preparation method thereof | |
| CN109133951A (en) | A kind of thermal resistance drainage agent and preparation method thereof | |
| TWI593657B (en) | Chromium-based stuffing sand for steel ladle | |
| CN106145979A (en) | A kind of pouring materialfor steel ladle | |
| CN103992123A (en) | Brushing-resistant submerged-nozzle inner wall for continuously casting high-manganese high-oxygen steel | |
| CN101565598A (en) | High-temperature sealant for immersion nozzle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |