CN106493347A - Continuous casting tundish quick-change nozzle and the method with its dross inclusion adsorption - Google Patents
Continuous casting tundish quick-change nozzle and the method with its dross inclusion adsorption Download PDFInfo
- Publication number
- CN106493347A CN106493347A CN201610934554.8A CN201610934554A CN106493347A CN 106493347 A CN106493347 A CN 106493347A CN 201610934554 A CN201610934554 A CN 201610934554A CN 106493347 A CN106493347 A CN 106493347A
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- tundish
- module
- fast sprue
- replacing
- replacing module
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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
- B22D41/507—Pouring-nozzles giving a rotating motion to the issuing molten metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle
Abstract
A kind of continuous casting tundish quick-change nozzle and with the method for its dross inclusion adsorption, tundish quick-change nozzle includes tundish upper nozzle and fast sprue-replacing module, tundish upper nozzle is arranged on tundish bottom, fast sprue-replacing module is plugged with the middle part of tundish upper nozzle, fast sprue-replacing module is changed mechanism with the machinery being located at beside tundish upper nozzle and is connected, and the inner-cavity structure of fast sprue-replacing module is multiple geometric types according to the performance for making material.Fast sprue-replacing module is plugged in tundish upper nozzle before baking of tundish, adsorb molten steel with which in casting process to be mingled with, after fast sprue-replacing module internal cavity adsorbs a certain amount of field trash, under the driving of link gear, the baked new fast sprue-replacing module of insertion, old fast sprue-replacing module is extruded, continues cast molten steel.This programme improves molten steel cleanness, reduces dross rate of the field trash in mouth of a river inwall, reduces improper adjustment operation during basket pouring.Can repeatedly, quickly and easily change fast sprue-replacing module.
Description
Technical field
The present invention relates to improving the device of molten steel cleanness, more particularly to a kind of continuous casting in a kind of conticaster casting process
With tundish quick-change nozzle and the method with its dross inclusion adsorption, strengthen aditus laryngis inner chamber using the fast fast sprue-replacing module of larynx formula is expanded
High-temperature molten steel turbulent motion, using field trash in aditus laryngis inwall absorption molten steel.
Background technology
In continuous casting, the removal of field trash becomes the key of clean steel production.Molten steel is by tundish through water on tundish
Mouthful injection crystallizer, if can in the mouth of a river further removal of inclusions, which can be avoided to enter in crystallizer, improve steel beam clean
Degree, while can reduce field trash is deposited on mouth of a river inwall, reduces nozzle clogging and even blocks.
Generally reduced using technology such as Calcium treatment, tundish structure optimization, argon blowings in actual production and flow through the mouth of a river
Field trash, improves the removal efficiency of the inclusion of early stage, improves molten steel cleanness, reduces the dross at the mouth of a river.Modern smelter
In usually through improving gate structure, reduce nozzle clogging using the methods such as the mouth of a river material of dross are difficult, serve preferably effect
Really, the conventional aluminum carbonaceous mouth of a river is the one of the main reasons for causing dross, and the introducing at the zirconium matter mouth of a river reduces mouth of a river inwall field trash
Adhesion, reduce dross.Research is carried out to the adsorption mechanism of mouth of a river inwall field trash and shows that molten steel has side in wall in the mouth of a river
Interlayer, forms velocity gradient, and then promotes field trash to stick to wall by boundary region when causing mouth of a river inclusion to flow through.Double
The exploitation of the tundish upper nozzles of export structure such as hole, three holes and porous, reduces the generation of exit dross to a certain extent,
But also make the structure of tundish upper nozzle outlet become more complicated simultaneously.
At present steel plant need to improve the cleanliness factor for flowing through molten steel at the mouth of a river, tundish using to there is dross existing at the mouth of a river
As being problem demanding prompt solution.
Content of the invention
In order to solve the problems of prior art presence, the purpose of the present invention one is to provide on a kind of continuous casting tundish
Mouth of a river module, realizes simply and easily producing the mouth of a river for improving inclusion removal effect；Two are to provide one kind utilizes continuous casting
The method of tundish upper nozzle dross inclusion adsorption, the method are used for the steel plant for currently using tundish upper nozzle molding casting,
Dross inclusion adsorption is can reach, molten steel cleanness is improved, nozzle blocking is reduced, the purpose in mouth of a river life-span is improved.
Realize that above-mentioned purpose is employed the following technical solutions：
A kind of continuous casting tundish quick-change nozzle, including tundish upper nozzle and fast sprue-replacing module, water on described tundish
Mouthful installed in tundish bottom, in the middle part of tundish upper nozzle, be plugged with fast sprue-replacing module, fast sprue-replacing module be located at
Between the machinery wrapped beside the mouth of a river change mechanism and be connected, the inner-cavity structure of the fast sprue-replacing module according to the performance for making material is
Multiple geometric types.
Preferably, fast sprue-replacing module is at the easy dross of the upper position of tundish upper nozzle, according to continuous casting
The practical situation of equipment installs one or more fast sprue-replacing modules in the middle and upper part of tundish upper nozzle.
Preferably, described fast sprue-replacing module is made using the high-temperature refractory of unlike material, making material is
Magnesio, calcio, aluminium base, magnesium calcio or its combination producing.
Preferably, the inner-cavity structure type of fast sprue-replacing module be square, hook, wedge type, ellipse, bent camber or its
Connect in its circle polygonal.
Preferably, the fast sprue-replacing module internal cavity wall of different structure has different roughness, its roughness passes through
The concave pit on inner of different fine sizes, salient point or its combination producing.
A kind of method for adsorbing field trash in the molten steel for flowing through the mouth of a river with tundish quick-change nozzle, concretely comprises the following steps：
1）Fast sprue-replacing module is installed：By in fast sprue-replacing module plant tundish upper nozzle before baking of tundish, high temperature dries
Roasting, tundish is moved to continuous casting position after baking, starts continuous cast molten steel；
2）Absorption molten steel is mingled with：In casting process, high speed molten steel injects crystallizer by tundish upper nozzle, and molten steel is through quick change
Mouth of a river module, forms turbulent flow whirlpool in the inner chamber of fast sprue-replacing module, and the field trash in molten steel is resistance to fast sprue-replacing module wall
Concurrently biochemical absorption and the physical absorption of fiery material impacts, more and more in the inner chamber dross inclusion adsorption of fast sprue-replacing module；
3）Change fast sprue-replacing module：After fast sprue-replacing module internal cavity adsorbs a certain amount of field trash, in the drive of link gear
Under dynamic, baked new fast sprue-replacing module inserted, and old fast sprue-replacing module is extruded, fast online replacement, continue cast
Molten steel.
Using above-mentioned technical proposal, compared with prior art, the present invention has advantages below：
1）Improve molten steel cleanness
The field trash of tundish upper nozzle, particularly microinclusions is flowed through in molten steel, after adsorbing through fast sprue-replacing modular high-performance,
Greatly reduce field trash to enter in crystallizer, improve molten steel cleanness.
2）Reduce nozzle clogging rate
Fast sprue-replacing module increased the adsorption efficiency of field trash, reduce field trash in mouth of a river inwall dross rate, in reducing
Between bag cast when improper adjustment operation.
3）Improve tundish upper nozzle service life
Fast sprue-replacing module can repeatedly, be quickly and easily changed, the replacing number of times of whole tundish upper nozzle is reduced, is improved which
Service life, transforms also fairly simple, the operation use such as suitable steel plant continuous casting on existing tundish upper nozzle equipment.
Description of the drawings
Fig. 1 is fast sprue-replacing module overall diagram of the present invention.
Fig. 2 is the Section A-A top view of Fig. 1.
Fig. 3 is hook inner chamber fast sprue-replacing module diagram.
Fig. 4 is wedge type inner chamber fast sprue-replacing module diagram.
Fig. 5 is ellipse inner chamber fast sprue-replacing module diagram.
Fig. 6 is the square inner chamber fast sprue-replacing module diagram with pit.
Labelling in figure, tundish upper nozzle 1, molten steel 2 expand larynx formula fast sprue-replacing module 3, hook inner chamber mouth of a river module 4, wedge
Type inner chamber mouth of a river module 5, ellipse inner chamber mouth of a river module 6, square inner chamber mouth of a river module 7, pit 8.
Specific embodiment
Below in conjunction with the accompanying drawings and specific embodiment the present invention will be further described.
A kind of continuous casting tundish quick-change nozzle, tundish upper nozzle 1 are arranged on tundish bottom, and its structure is shown in Fig. 1-figure
2, fast sprue-replacing module is fitted with the easy dross of the upper position of tundish upper nozzle 1, as fast sprue-replacing module is arranged on
The middle and upper part of tundish upper nozzle 1, referred to as larynx formula fast sprue-replacing module 3 is expanded, expands larynx formula fast sprue-replacing module 3 and is located at
Machinery beside tundish upper nozzle is changed mechanism and is connected, and current mechanism of the mechanism for continuous casting installation for casting changed by machinery.Fast sprue-replacing
Module is made using the high-temperature refractory of unlike material, and material is magnesio, calcio, aluminium base, magnesium calcio or its combination producing.According to
According to the performance of the high-temperature refractory of unlike material, the inner-cavity structure of the expansion larynx formula fast sprue-replacing module 3 is according to making material
Performance can be multiple geometries, see Fig. 3-Fig. 6, and the inner-cavity structure type for expanding larynx formula fast sprue-replacing module 3 is square, hook
Connect in type, wedge type, ellipse, bent camber or other circles polygonal.The fast sprue-replacing module internal cavity wall of different structure has
Different roughness, its roughness is by the concave pit on inner of different fine sizes, salient point or its combination producing.According to continuous casting installation for casting
Practical situation determine install fast sprue-replacing module number, one or more.
Specific embodiment is as follows
Embodiment 1
A kind of continuous casting expands larynx formula fast sprue-replacing with 100t tundish, sees Fig. 1, Fig. 6, fast including tundish upper nozzle 1 and expansion larynx formula
Change mouth of a river module 3, tundish upper nozzle plants one installed in the bottom of tundish at the easy dross in the middle part of tundish upper nozzle 1
Individual expansion larynx formula fast sprue-replacing module 3, is expanded larynx formula fast sprue-replacing module 3 and is connected with the machinery replacing mechanism beside the mouth of a river.Expand larynx formula
Fast sprue-replacing module 3 adopts the high-temperature refractory containing CaO for 60% calcio material；See Fig. 6, expand larynx formula fast sprue-replacing module 3
Inner chamber is square, and referred to as square inner chamber mouth of a river module 7, square inner chamber collar extension is 80 × 100mm with internal orifice, deep
60mm；Square inner chamber wall is covered with the pit 8 of 3mm diameters.
The concrete step of field trash in 1600 DEG C of molten steel 2 of tundish upper nozzle is flowed through with the absorption of square inner chamber mouth of a river module 7
Suddenly it is：Square inner chamber mouth of a river module 7 is plugged in tundish upper nozzle before baking of tundish, starts high-temperature baking, after baking
Tundish is moved to continuous casting position, starts continuous cast；In casting process, high speed molten steel is injected by tundish upper nozzle 1
Crystallizer, through square inner chamber mouth of a river module 7, at the square inner chamber mouth of a river, 7 aditus laryngis inner chamber of module forms turbulent flow whirlpool, molten steel to molten steel
Interior field trash collides concurrently biochemical absorption and physical absorption, side with 7 inner chamber wall refractory material of square inner chamber mouth of a river module
The type inner chamber mouth of a river 7 inner chamber dross inclusion adsorptions of module are more and more；It is mingled with when the absorption of 7 inner chamber of square inner chamber mouth of a river module is a certain amount of
After thing, under the driving of link gear can insert baked new fast sprue-replacing module, and old fast sprue-replacing module extruded,
Quick online replacing is realized, continues cast.
Embodiment 2
A kind of continuous casting expands larynx formula fast sprue-replacing with 120t tundish, sees Fig. 1, Fig. 4, fast including tundish upper nozzle 1 and expansion larynx formula
Change mouth of a river module 3, tundish upper nozzle is arranged on tundish bottom, plant one at the easy dross in the middle part of tundish upper nozzle 1
Expand larynx formula fast sprue-replacing module 3, expand larynx formula fast sprue-replacing module 3 and be connected with the machinery replacing mechanism beside the mouth of a river.Expand larynx formula fast
Change mouth of a river module 3 and adopt the high-temperature refractory containing CaO for magnesium calcio material that 30%, MgO is 30%；See Fig. 4, expand larynx formula quick change
Mouth of a river module internal cavity is wedge type 5, and referred to as wedge type inner chamber mouth of a river module 5,5 80 × 120mm of collar extension of wedge type inner chamber mouth of a river module are interior
Mouth 60 × 100mm, deep 60mm；Module 5 inner chamber wall in the wedge type inner chamber mouth of a river is covered with the salient point of 5mm diameters.
Concretely comprising the following steps for field trash in 1600 DEG C of molten steel 2 at the mouth of a river is flowed through with the absorption of wedge type inner chamber mouth of a river module 5：Middle
Wedge type inner chamber mouth of a river module 5 is plugged in tundish upper nozzle before bag baking, starts high-temperature baking, tundish is moved after baking
To continuous casting position, start continuous cast；In casting process, high speed molten steel injects crystallizer, molten steel by tundish upper nozzle
Through wedge type inner chamber mouth of a river module 5, at the wedge type inner chamber mouth of a river, module 5 forms turbulent flow whirlpool, and the field trash in molten steel is resistance in wall
Concurrently biochemical absorption and the physical absorption of fiery material impacts, the wedge type inner chamber mouth of a river 5 dross inclusion adsorptions of module are more and more；Work as the mouth of a river
After module internal cavity adsorbs a certain amount of field trash, baked new mouth of a river module can be inserted under the driving of link gear, and will
Old module extrusion, realizes quick online replacing, continues cast.
Embodiment 3
A kind of continuous casting expands larynx formula fast sprue-replacing with 120t tundish, sees Fig. 1, Fig. 3, fast including tundish upper nozzle 1 and expansion larynx formula
Change mouth of a river module 3, described tundish upper nozzle is arranged on tundish bottom, insert at the easy dross in the middle part of tundish upper nozzle 1
Put one and expand larynx formula fast sprue-replacing module 3, expand larynx formula fast sprue-replacing module 3 and be connected with the machinery replacing mechanism beside the mouth of a river.Expand
Larynx formula fast sprue-replacing module adopts the high-temperature refractory containing MgO for 80% magnesio material；See Fig. 3, expand larynx formula fast sprue-replacing mould
Block inner chamber is that hook is referred to as hook inner chamber mouth of a river module 4, and module 4 collar extension in the hook inner chamber mouth of a river is 80 × 80mm with internal orifice,
Deep 60mm, 30 ° of the elevation angle；Expand the pit that larynx formula fast sprue-replacing module internal cavity wall is covered with 4mm diameters.
Concretely comprising the following steps for field trash in 1600 DEG C of molten steel 2 at the mouth of a river is flowed through with the absorption of hook inner chamber mouth of a river module 4：Middle
Hook inner chamber mouth of a river module 4 is plugged in tundish upper nozzle before bag baking, starts high-temperature baking, tundish is moved after baking
To continuous casting position, start continuous cast；In casting process, high speed molten steel injects crystallizer, molten steel by tundish upper nozzle
Through hook inner chamber mouth of a river module 4, at the hook inner chamber mouth of a river, module 4 forms turbulent flow whirlpool, and the field trash in molten steel is resistance in wall
Concurrently biochemical absorption and the physical absorption of fiery material impacts, the hook inner chamber mouth of a river 4 dross inclusion adsorptions of module are more and more；Work as the mouth of a river
After module internal cavity adsorbs a certain amount of field trash, baked new mouth of a river module can be inserted under the driving of link gear, and will
Old module extrusion, realizes quick online replacing, continues cast.
Embodiment 4
A kind of continuous casting expands larynx formula fast sprue-replacing with 100t tundish, sees Fig. 1, Fig. 5, fast including tundish upper nozzle 1 and expansion larynx formula
Change mouth of a river module 3, described tundish upper nozzle is arranged on tundish bottom, insert at the easy dross in the middle part of tundish upper nozzle 1
Put one and expand larynx formula fast sprue-replacing module 3, expand larynx formula fast sprue-replacing module 3 and be connected with the machinery replacing mechanism beside the mouth of a river.Expand
Larynx formula fast sprue-replacing module adopts the high-temperature refractory containing MgO for 60% magnesio material；See Fig. 5, expand larynx formula fast sprue-replacing mould
Block inner chamber is ellipse, and module 6 major semiaxis in the ellipse inner chamber mouth of a river is 60mm, and semi-minor axis is 40mm；Expand larynx formula fast sprue-replacing mould
Block inner chamber wall is covered with the salient point of 3mm diameters.
Concretely comprising the following steps for field trash in 1600 DEG C of molten steel 2 at the mouth of a river is flowed through with the absorption of ellipse inner chamber mouth of a river module 6：In
Between bag baking before ellipse inner chamber mouth of a river module 6 is plugged in tundish upper nozzle, beginning high-temperature baking, by centre after baking
Bag moves to continuous casting position, starts continuous cast；In casting process, high speed molten steel injects crystallizer by tundish upper nozzle,
Through expanding larynx formula quick change ellipse inner chamber mouth of a river module 6, at the ellipse inner chamber mouth of a river, inner chamber forms turbulent flow whirlpool to molten steel, in molten steel
Field trash in wall refractory material collide concurrently biochemical absorption and physical absorption, ellipse inner chamber mouth of a river module 6 absorption folder
Debris are more and more；After mouth of a river module internal cavity adsorbs a certain amount of field trash, baking can be inserted under the driving of link gear
Good new mouth of a river module, and old module is extruded, realize quickly changing online, continue cast.
What the arrow shown in figure referred to molten steel flows through direction.
Although, above the present invention is described in detail with a general description of the specific embodiments,
On the basis of the present invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Cause
This, these modifications or improvements, belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.
Claims (6)
1. a kind of continuous casting tundish quick-change nozzle, including tundish upper nozzle and fast sprue-replacing module, on described tundish
The mouth of a river is arranged on tundish bottom, it is characterised in that be plugged with fast sprue-replacing module, fast sprue-replacing in the middle part of tundish upper nozzle
Module is changed mechanism with the machinery being located at beside tundish upper nozzle and is connected, and the inner-cavity structure of the fast sprue-replacing module is according to making
The performance of material is multiple geometric types.
2. continuous casting tundish quick-change nozzle according to claim 1, it is characterised in that during fast sprue-replacing module is arranged on
Between wrap the mouth of a river upper position easy dross at, pacified in the middle and upper part of tundish upper nozzle according to the practical situation of continuous casting installation for casting
Fill one or more fast sprue-replacing modules.
3. continuous casting tundish quick-change nozzle according to claim 1 and 2, it is characterised in that described fast sprue-replacing mould
Block is made using the high-temperature refractory of unlike material, and material is magnesio, calcio, aluminium base, magnesium calcio or its combination producing.
4. continuous casting tundish quick-change nozzle according to claim 1, it is characterised in that the inner chamber knot of fast sprue-replacing module
Structure type be square, hook, wedge type, ellipse, bent camber or other circles in connect polygonal.
5. the continuous casting tundish quick-change nozzle according to claim 1 or 4, it is characterised in that the quick change water of different structure
Mouth mold block internal chamber wall face has different roughness, and its roughness is by the concave pit on inner of different fine sizes, salient point or its group
Symphysis into.
6. a kind of continuous casting tundish quick-change nozzle with described in claim 1 adsorbs in the molten steel for flowing through tundish upper nozzle and presss from both sides
The method of debris, it is characterised in that concretely comprise the following steps：
1）Mouth of a river module is installed：The fast fast sprue-replacing module of larynx formula will be expanded to be plugged in tundish upper nozzle before baking of tundish, high
Tundish is moved to continuous casting position after baking by temperature baking, starts continuous cast molten steel；
2）Absorption molten steel is mingled with：In casting process, high speed molten steel injects crystallizer by tundish upper nozzle, and molten steel is through quick change
Mouth of a river module, forms turbulent flow whirlpool in the inner chamber of fast sprue-replacing module, and the field trash in molten steel is resistance to fast sprue-replacing module wall
Concurrently biochemical absorption and the physical absorption of fiery material impacts, more and more in the inner chamber dross inclusion adsorption of fast sprue-replacing module；
3）Change mouth of a river module：After fast sprue-replacing module internal cavity adsorbs a certain amount of field trash, under the driving of link gear,
What insertion was baked renews mouth of a river module, and old for fast sprue-replacing module module is extruded, fast online replacement, continues cast steel
Liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610934554.8A CN106493347B (en) | 2016-10-25 | 2016-10-25 | Continuous casting tundish quick-change nozzle and the method with its dross inclusion adsorption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610934554.8A CN106493347B (en) | 2016-10-25 | 2016-10-25 | Continuous casting tundish quick-change nozzle and the method with its dross inclusion adsorption |
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| CN106493347A true CN106493347A (en) | 2017-03-15 |
| CN106493347B CN106493347B (en) | 2018-07-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112024865A (en) * | 2020-11-03 | 2020-12-04 | 北京科技大学 | Stopper rod, tundish and method for removing inclusions in liquid metal |
| CN113399660A (en) * | 2021-06-24 | 2021-09-17 | 江苏沙钢集团有限公司 | Flow distribution type tundish and pouring system for thin strip continuous casting |
| CN116586597A (en) * | 2023-07-17 | 2023-08-15 | 联峰钢铁（张家港）有限公司 | Device and method for preventing tundish nozzle from nodulation |
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| CN112024865A (en) * | 2020-11-03 | 2020-12-04 | 北京科技大学 | Stopper rod, tundish and method for removing inclusions in liquid metal |
| CN113399660A (en) * | 2021-06-24 | 2021-09-17 | 江苏沙钢集团有限公司 | Flow distribution type tundish and pouring system for thin strip continuous casting |
| CN116586597A (en) * | 2023-07-17 | 2023-08-15 | 联峰钢铁（张家港）有限公司 | Device and method for preventing tundish nozzle from nodulation |
| CN116586597B (en) * | 2023-07-17 | 2023-10-17 | 联峰钢铁（张家港）有限公司 | Device and method for preventing tundish nozzle from nodulation |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106493347B (en) | 2018-07-06 |
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