CN109175343A - A kind of continuous casting production protection technique - Google Patents
A kind of continuous casting production protection technique Download PDFInfo
- Publication number
- CN109175343A CN109175343A CN201810745448.4A CN201810745448A CN109175343A CN 109175343 A CN109175343 A CN 109175343A CN 201810745448 A CN201810745448 A CN 201810745448A CN 109175343 A CN109175343 A CN 109175343A
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- CN
- China
- Prior art keywords
- sleeve pipe
- protection sleeve
- tundish
- crystallizer
- continuous casting
- 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
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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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a kind of continuous casting production protection techniques, are related to process for making field, comprising the following steps: a toasts tundish in baking position, and baking terminates to be moved to casting position；B, the protection sleeve pipe of molten steel in crystallizer is immersed in installation at the tundish slide gate nozzle of tundish lower end；C injects molten steel into tundish from wrapping greatly；D, molten steel is poured via protection sleeve pipe into crystallizer in tundish；Protection sleeve pipe is replaced on time, is manually operated when replacing protection sleeve pipe by pulling rate disk and turns down crystallizer liquid steel level, is manually operated after the completion of protection sleeve pipe replacement by pulling rate disk and molten steel in mold liquid level is turned up.The present invention has replaced protection sleeve pipe in time; the damage and protection sleeve pipe for avoiding protection sleeve pipe caused by being subjected to the casting of long-time high temperature occur fractureing or phenomena such as chip off-fallings; it avoids the chip off-falling etc. that protection sleeve pipe goes out to fall into crystallizer, avoids the continuous casting billet slag inclusion that will appear in continuous casting production protection technical process.
Description
Technical field
The present invention relates to process for making field, especially a kind of tundish protection technique.
Background technique
In continuous casting process, it will appear continuous casting billet slag inclusion during drawing steel, and then form the broken material of breaking down in steel rolling, finally
It causes damages.Tundish is refractory material containers, and the molten steel to get off is poured from ladle and is assigned to each crystallization by the mouth of a river of tundish
In device.From the aspect of increasing economic efficiency and reducing energy consumption, it is necessary to propose some arrange for continuous casting production protection technique
It applies and improves.The main reason for causing slag inclusion breaking down to break material includes: that molten steel temperature in tundish is excessively high；Metal in Tundish liquid level mistake
It is low to cause slag；There is sundries to fall into molten steel at replacement protection sleeve pipe process crystallization device mouth；Protection sleeve pipe when replacing protection sleeve pipe
Appearance fractures or phenomena such as chip off-falling；Protection sleeve pipe insertion depth is too shallowly so as to cause slag；When tube drawing, casing certainly by pulling rate disk
Dynamic operation and and crystallizer liquid steel level is turned down, covering slag is not changed completely with regard to tube drawing, and covering slag is added after protection sleeve pipe insertion
Too early, liquid level is stablized not yet just adds covering slag etc..For avoid the broken material of slag inclusion breaking down need to control committed step temperature it is same
Protection of the Shi Jiaqiang to protection sleeve pipe, while needing the processing step of clear tundish.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of continuous casting production protection techniques, have replaced protection in time
Casing, fractureing occur in the damage and protection sleeve pipe for avoiding protection sleeve pipe caused by being subjected to the casting of long-time high temperature or chip off-falling etc. is existing
As avoiding the chip off-falling etc. that protection sleeve pipe goes out and falling into crystallizer, avoiding will appear in continuous casting production protection technical process
Continuous casting billet slag inclusion.
In order to solve the above technical problems, the technical scheme adopted by the invention is that:
A kind of continuous casting production protection technique, comprising the following steps:
A toasts tundish in baking position, and baking terminates to be moved to casting position；
B, the protection sleeve pipe of molten steel in crystallizer is immersed in installation lower end at the tundish slide gate nozzle of tundish lower end；
C injects molten steel into tundish from wrapping greatly；
D, molten steel is poured via protection sleeve pipe into crystallizer in tundish；
It is characterized in that, replacing protection sleeve pipe on time, it is manually operated by pulling rate disk by crystallizer molten steel when replacing protection sleeve pipe
Liquid level is turned down, and the interior liquid steel level of crystallizer (3) is turned up by the manual operation of pulling rate disk after the completion of protection sleeve pipe (2) replacement.
Technical solution of the present invention further improvement lies in that: control tundish in liquid level must be lower than 500mm.
Technical solution of the present invention further improvement lies in that: in tundish molten steel surface add carbonization rice husk covering agent,
Deslagging is carried out to tundish in time, control thickness of slag layer is lower than 100mm.
Technical solution of the present invention further improvement lies in that: replacement protection sleeve pipe before need to clear up crystallizer mouth and crystallizer
Interior sundries.
Technical solution of the present invention further improvement lies in that: adjustment protection sleeve pipe insertion depth, guarantee protection sleeve pipe insertion
Liquid level 80mm or more.
Technical solution of the present invention further improvement lies in that: molten steel in mold surface add crystallizer protecting residue.
Technical solution of the present invention further improvement lies in that: before disassembly protection sleeve pipe must first slugging, in slugging slag
Fishing is clean, and the device protection complete exposing liquid steel level of scorification to be crystallized dismantles protection sleeve pipe again, be installed after protection sleeve pipe (2) need to
Crystallizer protecting residue is added after liquid level stabilizing.
Technical solution of the present invention further improvement lies in that:
By adopting the above-described technical solution, the technological progress achieved by the present invention is: the protection sleeve pipe of replacement in every 4 hours.
The present invention avoids protection sleeve pipe caused by being subjected to the casting of long-time high temperature by replacing protection sleeve pipe in time
Damage and protection sleeve pipe occur fractureing or phenomena such as chip off-fallings, protect protection sleeve pipe, avoid the chip off-falling etc. that protection sleeve pipe goes out and fall
Enter in crystallizer, avoids the continuous casting billet slag inclusion that will appear in continuous casting production protection technical process.
Due to floating slag in time, thickness of slag layer avoids low liquid level casting from causing slag, the company of in turn resulting in no more than 100mm
Slab slag inclusion.Guarantee that protection sleeve pipe is inserted into liquid level 80mm or more, avoid protection sleeve pipe insertion depth it is too shallow caused by slag.
Crystallizer mouth is cleared up again before replacement protection sleeve pipe, has seen whether that sundries is fallen into wherein, it is therefore prevented that sundries is fallen into.
Change before protection sleeve pipe must first slugging avoid crystallizer protecting residue protection sleeve pipe influenced, extend the service life of protection sleeve pipe,
And slag fishing in crystallizer is completely reduced in slugging the possibility of secondary pollution.
It adjusts protection sleeve pipe and is inserted into Mold face 80mm or more, ensure that pouring temperature and further casting effect
Fruit.After equal liquid level stabilizings again plus crystallizer protecting residue prevents crystallizer protecting residue to be unevenly distributed, prevent crystallizer protecting residue compared with
Slag occurs for thin part.Replacement protection sleeve pipe avoids in casting when being broken or change protection sleeve pipe that protection sleeve pipe is disconnected, chip off-falling in time.
Detailed description of the invention
Fig. 1 is tundish, protection sleeve pipe and crystallizer connection schematic diagram of the present invention；
Wherein, 1, tundish, 2, protection sleeve pipe, 3, crystallizer, 4, crystallizer protecting residue, 5, tundish slide gate nozzle.
Specific embodiment
The present invention is described in further details below with reference to embodiment:
As shown in Figure 1, a kind of continuous casting production protection technique, comprising the following steps:
Tundish 1 is moved on to baking position by a, toasts tundish 1, and baking terminates to be moved to casting position, Ladle-casting apparatus be ceased fire, in
Between wrap and be laid with one layer of slag wool along edge, check whether have the gap between tundish backpack body and backpack cover, by the backpack cover lid of tundish 1
Close tundish 1 backpack body on along edge, smear gasket coating between the backpack cover of tundish 1 and the backpack body of tundish 1；
B, the protection sleeve pipe 2 of molten steel in crystallizer is immersed in installation at 1 lower end tundish slide gate nozzle 5 of tundish；
C wraps greatly revolving platform, and big packet, which is opened, to be poured, and molten steel is injected into tundish 1 from wrapping greatly, and molten steel enters tundish 1, in control
Between to wrap 1 mean temperature 15-30 DEG C higher than molten steel liquidus temperature, reduce molten steel viscosity, impurity made to be easy to float, while controlling big
Distance between packet and tundish 1, prevents impact force is excessive from causing slag, prevents immersion from opening to pour and cause steel of vomitting, in tundish 1
Carbonization rice husk covering agent is added, checks the thickness of slag blanket, carries out deslagging processing, by thickness of slag layer control within 100mm；
D opens tundish slide gate nozzle 5, and molten steel is poured via protection sleeve pipe 2 into crystallizer in tundish 1, then to crystallizer
Crystallizer protecting residue 4 is added, and waits slugging；
Replace protection sleeve pipe 2 on time in whole technical process, replacement in every 4 hours is primary.It is first carried out before disassembly protection sleeve pipe 2
Slugging processing, fishes out slag while slugging, dismantles protection sleeve pipe 2 after crystallizer protecting residue 4 all dissolves.Replace protection sleeve pipe
3 liquid steel level of crystallizer is turned down by pulling rate disk when 2, protection sleeve pipe 2 is installed and liquid level in crystallizer is turned up later, guarantee
Protection sleeve pipe 2 gos deep into the liquid level 80mm or more of crystallizer 3, and slugging again.By manual in 2 replacement process of entire protection sleeve pipe
Pulling rate disk is operated, pulling rate disk is in manual mode.The liquid level in tundish 1 is controlled in whole technical process, makes liquid
Face is not less than 500mm.
There are 44 breaking down using this workshop before this technique and breaks material, averagely monthly 7 to 8 times.Using after this technique
This workshop only occurs the broken material of 2 breaking down from November, 2017 in March, 2018, and defect and accident frequency greatly reduce.
Claims (8)
1. a kind of continuous casting production protection technique, comprising the following steps:
A toasts tundish (1) in baking position, and baking terminates to be moved to casting position；
B, the protection sleeve pipe of molten steel in crystallizer (3) is immersed in installation lower end at tundish (1) lower end tundish slide gate nozzle (5)
(2)；
C injects molten steel into tundish (1) from wrapping greatly；
D, the casting into crystallizer (3) via protection sleeve pipe (2) of tundish (1) interior molten steel；
It is characterized in that, protection sleeve pipe (2) are replaced on time, it will crystallization by the manual operation of pulling rate disk when replacing protection sleeve pipe (2)
Device (3) liquid steel level is turned down, and is manually operated by pulling rate disk by the interior molten steel liquid of crystallizer (3) after the completion of protection sleeve pipe (2) replacement
It is turned up in face.
2. a kind of continuous casting production protection technique according to claim 1, it is characterised in that: control tundish (1) interior liquid
Face must be lower than 500mm.
3. a kind of continuous casting production protection technique according to claim 1, it is characterised in that: in tundish (1) interior molten steel
Carbonization rice husk covering agent is added on surface, carries out deslagging to tundish (1) in time, and control thickness of slag layer is lower than 100mm.
4. a kind of continuous casting production protection technique according to claim 1, it is characterised in that: before replacement protection sleeve pipe (2)
Need to clear up crystallizer mouth and crystallizer (3) interior sundries.
5. a kind of continuous casting production protection technique according to claim 1, it is characterised in that: adjustment protection sleeve pipe (2) is inserted
Enter depth, guarantees that protection sleeve pipe (2) are inserted into liquid level 80mm or more.
6. a kind of continuous casting production protection technique according to claim 1, it is characterised in that: in crystallizer (3) interior molten steel
Add crystallizer protecting residue (4) in surface.
7. a kind of continuous casting production protection technique according to claim 6, it is characterised in that: before disassembly protection sleeve pipe (2)
Necessary elder generation's slugging, fishes out slag completely in slugging, and device covering slag (4) to be crystallized has changed exposing liquid steel level and dismantled protection sleeve pipe again
(2), it needs to add crystallizer protecting residue (4) after liquid level stabilizing after being installed protection sleeve pipe (2).
8. a kind of continuous casting production protection technique according to claim 1, it is characterised in that: replacement in every 4 hours is primary to be protected
Protecting pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810745448.4A CN109175343A (en) | 2018-07-09 | 2018-07-09 | A kind of continuous casting production protection technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810745448.4A CN109175343A (en) | 2018-07-09 | 2018-07-09 | A kind of continuous casting production protection technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109175343A true CN109175343A (en) | 2019-01-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810745448.4A Pending CN109175343A (en) | 2018-07-09 | 2018-07-09 | A kind of continuous casting production protection technique |
Country Status (1)
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| CN (1) | CN109175343A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63137553A (en) * | 1986-11-27 | 1988-06-09 | Kawasaki Steel Corp | Method for starting dipping of long nozzle |
| CN102941323A (en) * | 2012-12-12 | 2013-02-27 | 济钢集团有限公司 | Method for quickly replacing tundish at low liquid level of medium thin plate blank continuous casting machine crystallizer |
| CN103008639A (en) * | 2011-09-21 | 2013-04-03 | 山西太钢不锈钢股份有限公司 | Continuous casting protection pouring method for austenitic stainless steel |
| CN105710328A (en) * | 2014-12-05 | 2016-06-29 | 重庆永林机械设备有限公司 | 30MnSi continuous casting process |
| CN107282902A (en) * | 2016-04-04 | 2017-10-24 | 鞍钢股份有限公司 | A kind of replacing options of submersed nozzle |
-
2018
- 2018-07-09 CN CN201810745448.4A patent/CN109175343A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63137553A (en) * | 1986-11-27 | 1988-06-09 | Kawasaki Steel Corp | Method for starting dipping of long nozzle |
| CN103008639A (en) * | 2011-09-21 | 2013-04-03 | 山西太钢不锈钢股份有限公司 | Continuous casting protection pouring method for austenitic stainless steel |
| CN102941323A (en) * | 2012-12-12 | 2013-02-27 | 济钢集团有限公司 | Method for quickly replacing tundish at low liquid level of medium thin plate blank continuous casting machine crystallizer |
| CN105710328A (en) * | 2014-12-05 | 2016-06-29 | 重庆永林机械设备有限公司 | 30MnSi continuous casting process |
| CN107282902A (en) * | 2016-04-04 | 2017-10-24 | 鞍钢股份有限公司 | A kind of replacing options of submersed nozzle |
Non-Patent Citations (6)
| Title |
|---|
| 孙宁刚等: "连铸中间包快速更换定径水口技术的应用", 《河北冶金》 * |
| 本书编辑委员会: "《钢铁工业节能减排新技术5000问（中）（炼钢-连铸分册）》", 31 July 2009, 中国科学技术出版社 * |
| 朱苗勇等: "《现代冶金工艺学钢铁冶金卷》", 31 December 2016, 冶金工业出版社 * |
| 李殿明等: "《连铸结晶器保护渣应用技术》", 30 April 2008, 冶金工业出版社 * |
| 王洪富: "鄂钢4#机连铸机使用铯源型液面自动控制的实践", 《河南冶金》 * |
| 蔡开科: "《连铸坯质量控制》", 31 May 2010, 冶金工业出版社 * |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190111 |
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| RJ01 | Rejection of invention patent application after publication |