CN109396407A - A kind of high life tundish cover - Google Patents
A kind of high life tundish cover Download PDFInfo
- Publication number
- CN109396407A CN109396407A CN201811622127.1A CN201811622127A CN109396407A CN 109396407 A CN109396407 A CN 109396407A CN 201811622127 A CN201811622127 A CN 201811622127A CN 109396407 A CN109396407 A CN 109396407A
- Authority
- CN
- China
- Prior art keywords
- main structure
- tundish cover
- high life
- cover according
- life tundish
- 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.)
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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
-
- 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
- B22D41/02—Linings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ceramic Products (AREA)
Abstract
A kind of high life tundish cover; it is related to tundish manufacturing technology field; including main structure; main structure is refractory material formed body; it is equipped with skeleton structure inside main structure, is reserved with baking hole and stopper hole; the periphery of main structure is equipped with protection steel plate fence; two faces of main structure are non-working surface and following working face or the arc-shaped design of following working face above; the tundish cover of the structure; it is not susceptible to deformation or slump; safety in utilization is good, the service life is long, compares the existing plate tundish cover used and duration is used to improve 20% or more.
Description
Technical field
The present invention is the Optimal improvements to tundish cover, is related to tundish manufacturing technology field, and in particular to one kind makes
With the tundish cover that safety is good, the service life is long, while providing the preparation method of this tundish cover.
Background technique
Energy saving and sustainable development, is economic one of the important measures for keeping and being promoted development, and heat-insulation and heat-preservation is section
One of the important measure of energy, during continuous casting cast steel, the use of tundish cover has in terms of the heat-insulation and heat-preservation of continuous casting cast steel
There is consequence.Traditional tundish cover is to utilize integrally formed full cast steel or ironcasting, good integrity, but through height
It unevenly is also easy to produce biggish thermal stress (poor) by thermoae after warm radiation, especially under rapid heat cycle effect, steel-casting
Serious deformation and warpage easily occur for phase transformation repeatedly；Also easy dry slag steel bonding simultaneously, is not easily cleaned, influences its normal use.
Existing using backpack cover in extensive is mostly metal structure and the compound flat middle backpack cover of refractory material, Yi Fasheng
The damage such as metal structure ablation, bending deformation and castable refractory structure spalling.The ablation of metal structure is a high temeperature chemistry
The change procedure of corrosion and melting, the contact position between castable refractory and metal structure or backpack cover ontology is caused due to deformation
Poorly sealed, the flame and high-temp waste gas of high-temp combustion directly wash away, along with molten steel hyperthermia radiation makes backpack cover working face
Temperature rises rapidly, and causes exposed metal edge frame surface serious high-temperature oxydation corrode occur, causes the continuous of metal structure
Ablation；Secondly backpack cover uneven heating is even makes it that deformation, castable be caused to be peeled off because of thermal stress, in addition the Warm status of backpack cover loads and unloads
When metal structure mechanical behavior under high temperature it is low, and then enhance castable refractory peeling damage.Secondly, in continuous casting process
The impact that the gas etc. that the molten chemical effect of the coating of molten steel surface addition generates generates repeatedly backpack cover also exacerbates packet
The thermal stress of lid working face is uneven, becomes one of the major influence factors that its deformation is peeled off.
It is intermediate disclosed in Chinese patent CN205834198U, CN205834200U for the service life of backpack cover in improving
Packet backpack cover using auxiliary material adding mouth, the alternating pore structure in stopper hole, while being aided with reinforcing rib and Y type anchoring piece to increase fire resisting
Combination and stress relief intensity between castable and metal structure enhance insulation, and then improve service life.It is Chinese special
It is wrapped in a kind of continuous casting disclosed in sharp CN104588630A, metal outer frame cambering is carried out to molten steel impact zone position backpack cover, together
When be aided with V-type anchoring piece, with optimize in backpack cover service life.
It is more to tundish cover life-span upgrading using aforesaid way, but as resource is nervous, yield pressure and waste material are sharp
With slow multiple pressure, in use, more difficult task target is proposed to the service life of backpack cover.
Summary of the invention
Present invention aims to overcome that the deficiency of above-mentioned existing technology, provides one kind and is not susceptible to deformation or slump, makes
With the tundish cover that safety is good, the service life is long, compare the existing plate tundish cover used use duration raising 20% with
On.
Another object of the present invention is to provide a kind of preparation methods of above-mentioned tundish cover.
The main ability to bear by improving backpack cover thermal stress unevenness of the realization of the object of the invention and cooling alleviation high temperature
Reach.Main improvement direction first is that improving the surface structure of tundish cover main body, using arch-shaped design style, to work
Face and surface carry out cambered design, increase backpack cover ontology castable refractory prefabricated component to stress with the advantageous Curve Design of arc
Alleviate releasability.Specifically be implemented: a kind of high life tundish cover, including main structure, main structure are resistance to
Fiery material molded compact is equipped with skeleton structure inside main structure, is reserved with baking hole and stopper hole, the periphery of main structure are equipped with
Protect steel plate fence, it is characterised in that two faces of main structure i.e. non-working surface and following working face or following working face above
Arc-shaped design.This cambered design is the design pattern for imitating arch bridge, i.e. cambered design is in upward arch mode, from engineering
Amechanical angle considers, the power of arch can be played, to offset the slump pulling force of material under the high-temperature condition of part；Such design simultaneously
It plays in the extruding drag shown for staying the curve in deformation process and straightening line transient process, under material of main part
Couch deformation is in reversal of stress and reversed support, to inhibit the deformation of backpack cover.It makes and produces, inoperative above to simplify simultaneously
Face may be configured as plane, only relies on the arcuate structure of following working face to improve its stress release ability, delays deformation extent, mention
High life.
Further, the surrounding bottom surface of main structure is in same plane, to ensure that the steady sealing of backpack cover is placed.
Further, the spiral net muscle in skeleton structure is staggeredly interspersed in main structure inner space, is enhanced with this
Linking steady character between resistance to material castable and metal grain.
It further, include the circular metal pipe network of connection and Mulit-point Connection atmosphere, the circle in skeleton structure
Thickness of pipe wall 15-30mm, internal orifice dimension is not less than 10mm, to ensure it with enough resistance to compression resistance to deformation intensity；It is in refractory material
Inside forms the multidirectional arcwall face domain of perforation material internal in vertical or horizontal and crossed longitudinally arrangement, and multiple spot is connected to atmosphere.This
A little round tubular networks can play the role of supporting refractory material, ensure the whole uniformity of refractory material and using safe；
Secondly arc pipeline hollow mould formula has ensured the stress relief and release approach of material internal again, makes full use of outside the arc of pipeline
The arc for constructing the contact surface of resistance to material and metal tubes is seen, secondly these connect that open to atmosphere pipe network is hollow and company using air
Logical and flowing carries out heat exchange, and then radiating and cooling to backpack cover inside, reduces the influence of thermal stress and temperature to backpack cover.
Further, the thin circular metal ventilation pipe network of perforation, non-work above main structure are additionally comprised in skeleton structure
Make the air inlet single-point connection inert gas inleting pipe on face, single-point or multiple spot venthole are located at working face below main structure
On.Venthole is so that inert gas is passed through inert gas into middle packet.Such design forms the channel that cools in backpack cover, leads to
It crosses and is passed through continuous coo1ing gas, backpack cover is made to cool down, while gas overflows into middle packet from working face and is filled in steel fluid level gauge
Between layer covering agent material and backpack cover, it is equivalent to molten steel upper space in the tundish into continuous casting work and injects inert gas,
It can preferably reduce and prevent the influence of oxygen or air that may be present to molten steel.The shape in channel can be circle,
Can be other geometries, the outer diameter radial dimension of the pipeline of thin circular metal ventilation pipe network be not easy it is excessive, mainly from having
Conducive to ensuring that backpack cover intensity angle sets out, inert gas cooling line channel, diameter preferably 10-20mm is meticulous to imitate to cooling
Fruit is unfavorable, and slightly then influences the integral strength of resistance to material castable excessively, the fitness of metal component and resistance to material castable to backpack cover
It produces bigger effect.
The seam crossing of every piece of backpack cover of the present invention, it is contemplated that tundish length issue bring separate assembling tundish cover
Production and use process, seam crossing, which is easy to happen, leaps up fire and airflow scouring influences, and under restricting in the combined factors such as cost
High temperature corrode and deformation easily occur for the most metal component used, therefore wrap up metal structure in seam crossing design castable refractory
The protection steel plate fence of the mode of part, i.e. backpack cover splicing seam areas is wrapped up by castable refractory.Utilize protection steel plate fence
Support and skeleton function, while protection steel plate fence is protected using refractory material resistant to high temperature and (slows down and prevent component
Oxidation and high temperature deformation), to improve the service performance and heat insulation effect of seam crossing；Such design is also convenient for live use simultaneously
In seam crossing smearing sealing refractory material, (the adherency compactness of coating and castable refractory is much larger than remaining metal component to process
Adhesiveness, be convenient to clean simultaneously), leapt up the generation of fiery phenomenon with further prevention.
A kind of preparation method of high life tundish cover of the present invention includes shape-designing, skeleton structure production and resistance to
The moulding by casting of fiery castable, it is characterised in that the universal outer frame mould of production, bed die and backform before molding, according to layout design into
Then row inner skeleton structure fabrication adds castable refractory moulding by casting of the refractoriness at 1500 DEG C or more after composable mold,
Heating baking uses baking for the first time so that whole obtain enough working strengths.
Castable refractory used in preparation method of the present invention is mullite castable, because it is inner porosity,
Can be using thermal shock resistance of its porous structure enhancing tundish cover under rapid heat cycle state, while porous structure can also rise
To thermal insulation function.Bleed pore creating material is added in mullite castable (can decompose) 0.05wt%- under middle low temperature condition
0.5wt% can require be adjusted according to different thermal requirements and backpack cover bulk strength, the bleed pore creating material of addition can at
Type process introduces a small amount of gas, and (500 DEG C or more) burning mistakes leave more internal porosities under the conditions of first time using temperature, obtain
There must be the inner porosity of some strength structure, to ensure its job security.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment 1.
Fig. 2 is the side view of embodiment 1.
Fig. 3 is the structural schematic diagram of embodiment 2.
Fig. 4 is the side view of embodiment 2.
Specific embodiment
Embodiment 1
Referring to Fig. 1 and Fig. 2, a kind of high life tundish cover, two faces of main structure are non-working surface 7 and following work above
Face 8 is arch-shaped design, and surrounding bottom surface is in same plane, main structure be refractory material formed body 2, inside be equipped with
Skeleton structure is reserved with baking hole and stopper hole 3, and the periphery of main structure is equipped with protection steel plate fence 1, and backpack cover splices seam
The protection steel plate fence 1 of position is wrapped up by castable refractory.
Contain connection in skeleton structure and curved line interweaves, multiple spot connects open to atmosphere circular metal pipe network 5, it is round in design
Thickness of pipe wall 15-30mm, internal orifice dimension are not less than 10mm, and round tubular object makees skeleton bridge joint support (only perpendicular to intermediate packet length side
To)；The thin circular metal ventilation pipe network 6 of perforation is additionally comprised in skeleton structure, the pipe of thin circular metal ventilation pipe network in design
The diameter of paths is 10-20mm, and the air inlet single-point above main structure on non-working surface 7 connects inert gas inleting pipe,
It is passed through cooling air convenient for the inert gas inleting pipe at the scene of docking safely, centering backpack cover carries out timely continuous cooling, and then reduces
The bearing temperature of backpack cover, reduces influence of the rapid heat cycle to backpack cover, and single-point venthole is located at working face 8 below main structure
On, it is used to be passed through cold conditions inert gas (single-point discharge) cooling in using, with the prefabricated entirety of castable refractory moulding by casting
Tundish cover heats baking hardening and obtains intensity after molding；Spiral net muscle 4 in skeleton structure is inside main structure
Spatial intersecting is interspersed, while skeleton structure and castable refractory contact bit distribution V-type anchor studs (metallic object outer periphery threads appropriate
Shape), the linking steady character between resistance to material castable and metal grain is enhanced with this.
Embodiment 2
Referring to Fig. 3 and Fig. 4, a kind of high life tundish cover, the upper surface of main structure non-working surface 7 is plane, is worked below
Face 8 is arch-shaped design, and surrounding bottom surface be in same plane, and main structure is refractory material formed body 2, inside be equipped with bone
Frame structure is reserved with baking hole and stopper hole 3, and the periphery of main structure is equipped with protection steel plate fence 1, and backpack cover splices seam areas
Protection steel plate fence 1 wrapped up by castable refractory.
Contain connection in skeleton structure and curved line interweaves, multiple spot connects open to atmosphere circular metal pipe network 5, it is round in design
Thickness of pipe wall 15-30mm, internal orifice dimension are not less than 10mm, and round tubular object makees skeleton bridge joint support (vertical and parallel intermediate packet length
Direction is arranged in a crisscross manner)；The thin circular metal ventilation pipe network 6 of perforation, thin round gold in design are additionally comprised in skeleton structure
The diameter for belonging to the pipe passage of ventilation pipe network is 10-20mm, and the air inlet single-point connection above main structure on non-working surface 7 is lazy
Property gas inlet pipe, the inert gas inleting pipe convenient for the scene of docking safely is passed through cooling air, and centering backpack cover carries out continuous in time
Cooling, and then the bearing temperature of backpack cover is reduced, influence of the rapid heat cycle to backpack cover is reduced, multiple spot venthole is located at main structure
Below on working face 8, uses to be passed through cold conditions inert gas (single-point discharge) cooling in using, poured into castable refractory
The prefabricated whole tundish cover of type, heats baking hardening and obtains intensity after molding；It is suitably staggeredly interspersed with inside main structure
Spiral net muscle, while skeleton structure and castable refractory contact bit distribution V-type anchor studs (metallic object outer periphery threads appropriate
Shape), the linking steady character between resistance to material castable and metal grain is enhanced with this.
The preparation method of above-described embodiment includes shape-designing, skeleton structure production and Mullite refractory castable
The moulding by casting of (bleed pore creating material 0.05wt%-0.5wt% is added in castable), the universal outer frame mould of production, bottom before forming
Mould and backform carry out inner skeleton structure fabrication according to layout design, and refractoriness is then added after composable mold at 1500 DEG C or more
Castable refractory moulding by casting, heating baking or for the first time using baking, so that whole obtain enough working strengths.
To those skilled in the art, in the design of this patent and the design of exemplary thinking, the prior art is utilized
And the intercombination between feature, it can be extended out design, the skeleton arrangement, cooling duct mode and resistance to of various structures mode
The variation of fiery material protection metal component mode etc., can equally be applied, and can also be realized essentially identical with above-described embodiment
Function and effect, then this no longer one by one citing describe in detail, belong to the protection scope of this patent.
Claims (10)
1. a kind of high life tundish cover, including main structure, main structure is refractory material formed body, inside main structure
It is equipped with skeleton structure, is reserved with baking hole and stopper hole, the periphery of main structure is equipped with protection steel plate fence, it is characterised in that main
Two faces of body structure are non-working surface and following working face or the arc-shaped design of following working face above.
2. a kind of high life tundish cover according to claim 1, it is characterised in that cambered design is setting for arch bridge
Meter mode, i.e. cambered design are in upward arch mode.
3. a kind of high life tundish cover according to claim 1 or 2, it is characterised in that the surrounding bottom surface of main structure
In same plane.
4. a kind of high life tundish cover according to claim 1, it is characterised in that the spiral in skeleton structure
Net muscle is staggeredly interspersed in main structure inner space.
5. a kind of high life tundish cover according to claim 1, it is characterised in that include connection in skeleton structure
And multiple spot connects open to atmosphere circular metal managed network, round thickness of pipe wall 15-30mm, internal orifice dimension is not less than 10mm.
6. a kind of high life tundish cover according to claim 1, it is characterised in that additionally comprised and passed through in skeleton structure
Logical thin circular metal is ventilated pipe network, and the air inlet single-point above main structure on non-working surface connects inert gas inleting pipe,
Single-point or multiple spot venthole are located at below main structure on working face, the diameter of the pipe passage of thin circular metal ventilation pipe network
For 10-20mm.
7. a kind of high life tundish cover according to claim 1, it is characterised in that the guarantor of backpack cover splicing seam areas
Shield steel plate fence is wrapped up by castable refractory.
8. a kind of high life tundish cover described in one of -7 according to claim 1, it is characterised in that preparation method includes
The moulding by casting of shape-designing, skeleton structure production and castable refractory, it is characterised in that the universal outline border mould of production before molding
Tool, bed die and backform carry out inner skeleton structure fabrication according to layout design, and refractoriness is then added after composable mold at 1500 DEG C
Above castable refractory moulding by casting, heating baking or first time use baking, so that whole obtain enough working strengths.
9. a kind of high life tundish cover according to claim 8, it is characterised in that fire resisting used in preparation method
Castable is mullite castable.
10. a kind of high life tundish cover according to claim 9, it is characterised in that mullite pours in preparation method
Bleed pore creating material 0.05wt%-0.5wt% is added in material feeding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811622127.1A CN109396407A (en) | 2018-12-28 | 2018-12-28 | A kind of high life tundish cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811622127.1A CN109396407A (en) | 2018-12-28 | 2018-12-28 | A kind of high life tundish cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109396407A true CN109396407A (en) | 2019-03-01 |
Family
ID=65461937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811622127.1A Pending CN109396407A (en) | 2018-12-28 | 2018-12-28 | A kind of high life tundish cover |
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| CN (1) | CN109396407A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111822686A (en) * | 2020-07-25 | 2020-10-27 | 武钢集团昆明钢铁股份有限公司 | Die casting method for continuous casting tundish cover and manufacturing die thereof |
| CN113579219A (en) * | 2020-04-30 | 2021-11-02 | 宝山钢铁股份有限公司 | Detachable tank cover for torpedo type mixed iron car and manufacturing method thereof |
| CN115213390A (en) * | 2022-07-15 | 2022-10-21 | 武汉钢铁集团耐火材料有限责任公司 | Construction method for reinforced steel ladle lining |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113579219A (en) * | 2020-04-30 | 2021-11-02 | 宝山钢铁股份有限公司 | Detachable tank cover for torpedo type mixed iron car and manufacturing method thereof |
| CN111822686A (en) * | 2020-07-25 | 2020-10-27 | 武钢集团昆明钢铁股份有限公司 | Die casting method for continuous casting tundish cover and manufacturing die thereof |
| CN111822686B (en) * | 2020-07-25 | 2022-02-01 | 武钢集团昆明钢铁股份有限公司 | Die casting method for continuous casting tundish cover and manufacturing die thereof |
| CN115213390A (en) * | 2022-07-15 | 2022-10-21 | 武汉钢铁集团耐火材料有限责任公司 | Construction method for reinforced steel ladle lining |
| CN115213390B (en) * | 2022-07-15 | 2023-06-23 | 武汉钢铁集团耐火材料有限责任公司 | Reinforced steel ladle lining construction method |
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