CN107716883A - Quick setting crystalline substance device - Google Patents
Quick setting crystalline substance device Download PDFInfo
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- CN107716883A CN107716883A CN201711262409.0A CN201711262409A CN107716883A CN 107716883 A CN107716883 A CN 107716883A CN 201711262409 A CN201711262409 A CN 201711262409A CN 107716883 A CN107716883 A CN 107716883A
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- Prior art keywords
- crystallizer
- cooling section
- cooling
- ripple
- molten steel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
- B22D11/055—Cooling the moulds
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
A kind of quick setting crystalline substance device, the top for the tubular crystallizer cooling section being made up of copper wall, connect the tubular crystallizer precooling zone that refractory material is formed；On the top of crystallizer cooling section, the complex intensifying type of cooling based on impinging cooling is used, the forced convertion type of cooling of water crack structure is still used in crystallizer cooling pars infrasegmentalis.Into the molten steel of quick setting crystalline substance device, after the slow cooling of crystallizer precooling zone and supercooling, into crystallizer cooling section by strong cold, the molten steel close to copper wall is set to be rapidly solidificated into green shell.The face crack of green shell is avoided because molten steel quickly solidifies, the efficiency of slab quality and continuous casting will be significantly improved；Molten steel quickly solidifies, and will also increase the thickness of green shell, is greatly decreased or even cancels secondary cooling of the conticaster to strand, improves the temperature of continuous casting steel billet.
Description
Technical field
The invention belongs to make steel continuously casting field, more particularly to a kind of quick setting crystalline substance device.
Background technology
The defects of slab surface crack is common in the continuous casting of steel, crackle Producing reason is intricate, and it is with tying
Brilliant the uneven of device cooling, mould reverse taper, the chemical composition of molten steel, the temperature of molten steel, the change of casting rate, covering slag
Performance, the insertion depth at the mouth of a river, the technological parameter such as discharge angle of spot hole at the mouth of a river are relevant with apparatus factor.
Influence slab surface crack factor it is relatively more, but its important factor be molten steel in crystallizer initial set due to coagulate
Solid the uneven generation stress of shell thickness, when stress is more than the intensity of green shell, generated in nascent green shell crackle or
Formation of crack, further expanded in process afterwards.
, will in conticaster at present because the problem of continuous casting technology in addition, though the temperature of molten steel and molten steel solidification is higher
Molten steel solidification is into after steel billet, and steel billet temperature is far below requirement of the hot rolling to steel billet temperature, and result in needs to enter steel billet before hot rolling
Row heating, the energy consumption of this heating is huge, accounts for the 10% of Steel Production Flow Chart total energy consumption, improves strand temperature, is that continuous casting technology needs
The major issue to be solved, it is significant to reduction steel production cost, the saving energy, reduction discharge.
To solve the problems, such as many of above-mentioned slab surface crack, prior art solution：It is above-mentioned except strictly controlling
It is the side that is generally used at present by controlling the heat flow of crystallizer outside the technological parameter and apparatus factor of steel-making and continuous casting
Case, for example, Chinese patent " CN104889358A " disclose it is a kind of control continuous plate blank surface crack method, this method according to
Different steel grades determine that the cracked heat flow density critical upper limit of slab is to the difference of crack sensitivity：Peritectic steel hot-fluid is close
Degree≤1.3MW/m2, medium carbon steel heat flow density≤1.45MW/m2, mild steel heat flow density≤1.65MW/m2Though this technical scheme
Strand crackle so can be effectively corresponded to, but limits crystallizer heat flow, also limits the production efficiency of conticaster.
To solve the problems, such as many of above-mentioned raising strand temperature, prior art solution：Domestic and international iron and steel enterprise
Hot-loading and hot-conveying technology is generally employed at present, is used to produce rod line for example, Chinese patent " CN104550237A " discloses one kind
The continuous casting of material and section bar-Direct Rolling device and method, the technical scheme are by the process after conticaster：Strand cuts, is defeated
Send organization of production that the equipment such as the roller-way of steel billet and steel billet convey etc. to undergo technological transformation, quickly, under heat-retaining condition by steel
Before base is delivered to hot-rolling mill, the temperature after steel billet is cast is preserved to greatest extent；Further to utilize the high temperature of molten steel, if changing
Enter molten steel solidification technology, cancel or significantly reduce cooling of the secondary cooling section of continuous caster to steel billet, then strand temperature will be improved from source
Degree, it is significant.
The content of the invention
Present invention aim to address the deficiency in above-mentioned technology, there is provided a kind of quick setting crystalline substance device, including be made up of copper wall
Tubulose crystallizer cooling section, it is characterised in that：The tubulose knot that the top of the crystallizer cooling section is formed with refractory material
Brilliant device precooling zone connection, cooling water jet nozzle is provided with the periphery of the crystallizer cooling section, outer with crystallizer cooling section
Surface interval is relative.
Above-mentioned crystallizer cooling section, it is characterised in that：The cross-sectional direction of described crystallizer cooling section, copper wall appearance
Face is shaped as groove.
Above-mentioned groove, it is characterised in that：The thickness of the bottom portion of groove copper wall is 4~160 mm, the height of recess sidewall
Spend for 1~400 mm, the thickness of recess sidewall is 1~60 mm.
Above-mentioned groove, it is characterised in that：The surface of the recess sidewall, ripple is provided with, the height of ripple is 0.1 ~ 2
Mm, the spacing of ripple is 2 ~ 25 mm.
Above-mentioned crystallizer cooling section, it is characterised in that：Cooling water jet nozzle is arranged on the crystallizer cooling section top
Periphery, it is relative with the groove interval of described crystallizer cooling section outer surface.
Water jet nozzle, the groove of crystallizer cooling section outer surface and the ripple of groove surfaces are cooled down, is formed with impinging cooling
Based on complex intensifying cooling structure.
In the periphery of crystallizer cooling pars infrasegmentalis, the water jacket being sleeved on outside crystallizer cooling section is provided with, is being crystallized
The water seam of flow of cooling water is formed between device cooling section Tong Bi outer surfaces and water jacket inner surface.
Above-mentioned crystallizer cooling section, it is characterised in that：In the crystallizer cooling section lower copper wall outer surface, it is provided with
Horizontal ripple, the height of ripple is 0.1 ~ 2 mm, and the spacing of ripple is 2 ~ 25 mm, ripple and the angle of crystallizer copper pipe axial direction
Spend for 45 ~ 90 degree.
In crystallizer cooling section outer surface, horizontal ripple is set, cooling of the cooling water to copper wall can be improved.
Above-mentioned crystallizer precooling zone, it is characterised in that：The length of the crystallizer precooling zone is 100 mm~1500
mm。
Above-mentioned crystallizer cooling section, it is characterised in that：The length of the crystallizer cooling section is 160 mm~1000
mm。
Above-mentioned crystallizer precooling zone, it is characterised in that：It can be used in the outer surface of the crystallizer precooling zone heat-insulated
Material is incubated.
It is incubated in the outer surface of crystallizer precooling zone using heat-barrier material, molten steel can be adjusted in crystallizer precooling zone
The situation that temperature reduces.
It is cold into crystallizer first in crystallizer precooling zone after slow cooling and supercooling into the molten steel of crystallizer
But section, on the top of crystallizer cooling section, due to the air gap that molten steel is not formed between green shell and green shell and copper wall, between molten steel and copper wall
Thermal resistance it is smaller, use the complex intensifying based on impinging cooling to cool down herein, strengthen cooler crystallizer in molten steel, make it is close
The molten steel of copper wall is rapidly solidificated into green shell.
The present invention has the positive effect that.
The quick setting crystalline substance device of the present invention avoids the production of crackle during molten steel solidification because molten steel is rapidly solidificated into green shell
It is raw；Fast due to solidifying, shell thickness when steel billet goes out crystallizer is big, intensity is high, can be greatly decreased or even cancel conticaster pair
The secondary cooling of strand, the temperature of continuous casting steel billet is improved from source, to realize that the direct hot rolling of continuous casting billet creates condition.
Brief description of the drawings
Fig. 1 is quick setting crystalline substance device longitudinal profile schematic diagram.
In figure, 1 is crystallizer precooling zone, and 2 be crystallizer cooling section, and 3 be cooling water jet nozzle, and 4 be water jacket, and 5 be molten steel,
6 be green shell, and arrow is flow of cooling water direction in figure.
Embodiment
The invention will be further described with reference to the accompanying drawings and detailed description.
Embodiment.
By taking 150 square blank crystallizers as an example, crystallizer precooling zone（1）Length for 300 mm, crystallizer cooling section（2）Length
Spend for 600 mm, in crystallizer cooling section（2）Heat flow maximum position in top uses compound based on slit impinging cooling
Strengthen cooling, crystallizer cooling section（2）Bottom is still cooled down using the forced convertion of water crack structure.
Fig. 1 is the quick setting crystalline substance device longitudinal profile schematic diagram of the present invention.
Quick setting crystalline substance device epimere is the tubular crystallizer precooling zone that refractory material is formed（1）, in crystallizer precooling zone（1）'s
Bottom, it is communicated with the crystallizer cooling section of the tubulose of copper wall composition（2）, in crystallizer cooling section（2）The cross-sectional direction on top,
Tong Bi outer surfaces are shaped as groove.
The thickness of bottom portion of groove is crystallizer cooling section（2）The thickness of tube wall, the height of recess sidewall is 100 mm, recessed
The thickness of groove sidewall is 16 mm, on the surface of recess sidewall, is provided with ripple, and the height of ripple is 0. 2 mm, between ripple
Away from for 6 mm.
In the crystallizer cooling section（2）The periphery on top, it is provided with cooling water jet nozzle（3）, with crystallizer cooling section
（2）The groove interval of outer surface is relative.
In the crystallizer cooling section（2）The periphery of bottom, it is provided with and is sleeved on crystallizer cooling section（2）Outer water jacket
（4）, in crystallizer cooling section（2）The water seam of flow of cooling water is formed between outer surface and water jacket inner surface, the width of water seam is
4.5 mm。
Crystallizer cooling section（2）Lower copper wall outer surface, is provided with horizontal ripple, to improve cooling water to the cold of copper wall
But, the height of ripple is 0.1 mm, and the spacing of ripple is 6 mm, and ripple is 90 degree with the axial angle of crystallizer copper pipe.
Into the molten steel of quick setting crystalline substance device（5）, first in crystallizer precooling zone（1）After slow cooling and supercooling, enter
Enter crystallizer cooling section（2）, in crystallizer cooling section（2）, cooling water is through supercooled water jet（3）Impacted in a manner of jet
Cooling is spaced relative Tong Bi outer surfaces therewith, strengthens the molten steel in cooler crystallizer（5）, make the fast rapid hardening of molten steel close to copper wall
Gu into green shell（6）.
Because molten steel is rapidly solidificated into green shell, the generation of crackle during molten steel solidification is avoided；Fast, the steel billet due to solidifying
Shell thickness when going out crystallizer is big, intensity is high, can be greatly decreased or even cancel secondary cooling of the conticaster to strand.
Claims (9)
1. a kind of quick setting crystalline substance device, include the crystallizer cooling section for the tubulose being made up of copper wall, it is characterised in that：The crystallizer
The top of cooling section connects with the tubular crystallizer precooling zone that refractory material is formed, and is set in the periphery of the crystallizer cooling section
There is cooling water jet nozzle, it is relative with the outer surface interval of crystallizer cooling section.
2. crystallizer cooling section according to claim 1, it is characterised in that：The cross section side of described crystallizer cooling section
To Tong Bi outer surfaces are shaped as groove.
3. groove according to claim 2, it is characterised in that：The thickness of the bottom portion of groove copper wall is that 4~160 mm are recessed
The height of groove sidewall is 1~400 mm, and the thickness of recess sidewall is 1~60 mm.
4. groove according to claim 2, it is characterised in that：The surface of the recess sidewall, ripple is provided with, ripple
It highly it is 0.1 ~ 2 millimeter, the spacing of ripple is 2 ~ 25 millimeters.
5. crystallizer cooling section according to claim 2, it is characterised in that：Cooling water jet nozzle is arranged on the crystallizer
The periphery on cooling section top, it is relative with the groove interval of described crystallizer cooling section outer surface；In the crystallizer cooling section
The periphery of bottom, the water jacket being sleeved on outside crystallizer cooling section is provided with, in crystallizer cooling section Tong Bi outer surfaces and water jacket
The water seam of flow of cooling water is formed between surface.
6. crystallizer cooling section according to claim 5, it is characterised in that：Outside the crystallizer cooling section lower copper wall
Surface, horizontal ripple is provided with, the height of ripple is 0.1 ~ 2 millimeter, and the spacing of ripple is 2 ~ 25 millimeters, ripple and crystallizer
The angle of copper pipe axial direction is 45 ~ 90 degree.
7. crystallizer precooling zone according to claim 1, it is characterised in that：The length of the crystallizer precooling zone is 100
The mm of mm~1500.
8. crystallizer cooling section according to claim 1, it is characterised in that：The length of the crystallizer cooling section is 160
The mm of mm~1000.
9. crystallizer precooling zone according to claim 1, it is characterised in that：Can in the outer surface of the crystallizer precooling zone
To be incubated using heat-barrier material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711262409.0A CN107716883A (en) | 2017-12-04 | 2017-12-04 | Quick setting crystalline substance device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711262409.0A CN107716883A (en) | 2017-12-04 | 2017-12-04 | Quick setting crystalline substance device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107716883A true CN107716883A (en) | 2018-02-23 |
Family
ID=61220915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711262409.0A Pending CN107716883A (en) | 2017-12-04 | 2017-12-04 | Quick setting crystalline substance device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107716883A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110681834A (en) * | 2019-11-05 | 2020-01-14 | 中冶赛迪重庆信息技术有限公司 | Square billet continuous casting crystallizer and cooling method |
-
2017
- 2017-12-04 CN CN201711262409.0A patent/CN107716883A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110681834A (en) * | 2019-11-05 | 2020-01-14 | 中冶赛迪重庆信息技术有限公司 | Square billet continuous casting crystallizer and cooling method |
| CN110681834B (en) * | 2019-11-05 | 2023-09-19 | 中冶赛迪信息技术(重庆)有限公司 | Square billet continuous casting crystallizer and cooling method |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180223 |
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| WD01 | Invention patent application deemed withdrawn after publication |