CN110899684A - Online reconnection method for sizing nozzle of tundish - Google Patents
Online reconnection method for sizing nozzle of tundish Download PDFInfo
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- CN110899684A CN110899684A CN201911050498.1A CN201911050498A CN110899684A CN 110899684 A CN110899684 A CN 110899684A CN 201911050498 A CN201911050498 A CN 201911050498A CN 110899684 A CN110899684 A CN 110899684A
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- tundish
- nozzle
- blocking rod
- flow blocking
- damaged
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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
- B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention provides a method for reconnecting a fixed diameter nozzle of a tundish on line, which cuts off a damaged part on the damaged fixed diameter nozzle, continues to connect a section of nozzle on the section line, can continue normal pouring of the reconnected fixed diameter nozzle of the tundish without sinking or overflowing, has synchronous pouring time and service life of the tundish, solves the problem of forced flow blockage or unplanned tundish replacement caused by the damaged fixed diameter nozzle of the tundish, improves the production efficiency and saves the cost of refractory materials.
Description
Technical Field
The invention relates to an online reconnection method for a fixed diameter nozzle of a tundish.
Background
The metering nozzle is one of the refractory materials for continuous casting of small square billets and plays a role in controlling the flow of molten steel. The molten steel uniformly and stably flows through the metering nozzle into the crystallizer, which is a necessary condition for ensuring the normal running of continuous casting, therefore, the metering nozzle has good erosion resistance and thermal stability, and is not allowed to be blocked, fall off, cracked and expanded when in use. And the continuous casting process is influenced by factors such as frequent flow blockage reopening, serious water gap erosion, improper operation and the like, the lower half part (part exposed outside the tundish) of the fixed-diameter water gap of the tundish is easily damaged, and only the tundish can be forced to be subjected to flow blockage casting or unplanned replacement, so that the production rhythm is disordered, the production efficiency is reduced, and the cost of refractory materials is increased.
Disclosure of Invention
The technical problem to be solved is as follows: aiming at the technical problem, the invention provides an online reconnection method for a fixed diameter water gap of a tundish.
The technical scheme is as follows: the invention provides an online reconnection method for a fixed diameter nozzle of a tundish, which comprises the following steps:
firstly, cutting off the damaged lower part of a damaged tundish metering nozzle, and then leveling the section;
step two, taking the intact tundish sizing nozzle of the same model, cutting off the lower part of the intact tundish sizing nozzle, and leveling the section of the lower part (4), wherein the cutting-off position is the same as the cutting-off position on the damaged tundish sizing nozzle;
step three, manufacturing an iron ring with the inner diameter corresponding to the outer diameter of the section, and preparing refractory mortar and a flow blocking rod, wherein the flow blocking rod is formed by connecting a conical metal plug and a handle;
step four, blowing off oxygen generated by burning cold steel in the inner hole of the damaged tundish sizing nozzle, vertically bonding the lower part on the section of the damaged tundish sizing nozzle through refractory mortar, then sleeving an iron ring on a handle of a flow blocking rod, vertically pressing a metal plug of the flow blocking rod into the inner hole of the nozzle of the lower part, sleeving the iron ring on the periphery of the section, plugging a small gap between the iron ring and the outer wall of the nozzle by using a thin iron sheet, and then welding by using electric welding to ensure that the connected nozzle cannot overflow steel;
and step five, taking away the flow blocking rod, and burning oxygen to blow off cold steel in the inner hole of the sizing nozzle of the tundish, so that normal pouring can be continued.
Furthermore, in the fourth step, a lifting rope is tied in the middle of the flow blocking rod, a balance weight is hung at the tail end of the handle on the flow blocking rod, and then the metal plug of the flow blocking rod is vertically pressed into the inner hole of the water gap at the lower part.
Furthermore, in the fourth step, after a small gap between the iron ring and the outer wall of the water gap is plugged by a thin iron sheet and then is welded by electric welding, the iron ring and the tundish bottom shell are connected by a plurality of metal strips, so that the connected water gap is ensured not to sink.
Further, the number of the metal strips is 2-4.
Has the advantages that: the method of the invention can continue normal casting of the reconnected sizing nozzle of the tundish without sinking or steel overflow by continuously connecting a section of nozzle on the line at the damaged section of the sizing nozzle, and the casting time is synchronous with the service life of the tundish, thereby solving the problem of forced flow blockage or unplanned tundish replacement caused by the damaged sizing nozzle of the tundish, improving the production efficiency and saving the cost of refractory materials.
Drawings
Fig. 1 is a schematic structural view of a broken tundish metering nozzle.
Fig. 2 is a schematic structural view of a tundish metering nozzle after cross section leveling.
Fig. 3 is a schematic view of a complete tundish metering nozzle.
Fig. 4 is a schematic view of the lower part of a tundish metering nozzle taken in the middle of the tundish.
FIG. 5 is a flow chart showing the structure of the middle-lower part of the embodiment 2 after the online reconnection with the metering nozzle of the tundish.
In the figure, 1 is a damaged tundish metering nozzle, 2 is a section, 3 is a complete tundish metering nozzle, 4 is the lower half part of the complete tundish metering nozzle, 5 is an iron ring, 6 is a flow blocking rod, and 7 is a counterweight.
Detailed Description
The invention is further explained below with reference to the drawings.
Example 1
As shown in fig. 1-4, the invention provides an online reconnection method for a fixed diameter nozzle of a tundish, which comprises the following specific steps:
firstly, cutting off the damaged lower part of a damaged tundish metering nozzle 1, and then leveling a section 2 by iron rubbing;
step two, taking the same type of intact tundish sizing nozzle 3, cutting off the lower part 4 of the intact tundish sizing nozzle, and leveling the section of the lower part 4, wherein the cutting-off position is the same as the cutting-off position on the damaged tundish sizing nozzle;
step three, manufacturing an iron ring 5 with the inner diameter corresponding to the outer diameter of the section, and preparing refractory mortar and a flow blocking rod 6, wherein the flow blocking rod is formed by connecting a conical metal plug and a handle;
step four, blowing off oxygen from cold steel in the inner hole of the damaged tundish sizing nozzle 1, vertically bonding the lower part 4 on the section 2 of the damaged tundish sizing nozzle through refractory mortar, then sleeving an iron ring 5 on a handle of a flow blocking rod, vertically pressing a metal plug of the flow blocking rod 6 into the inner hole of the nozzle of the lower part 4, sleeving the iron ring 5 on the periphery of the section 2, plugging a small gap between the iron ring and the outer wall of the nozzle by a thin iron sheet and then welding the small gap by electric welding, thereby ensuring that the connected nozzle cannot overflow steel;
and step five, taking away the flow blocking rod, and burning oxygen to blow off cold steel in the inner hole of the sizing nozzle of the tundish, so that normal pouring can be continued.
In the fourth step of the method, the first step of the method,
example 2
As shown in FIG. 5, the invention provides an online reconnection method for a fixed diameter nozzle of a tundish, which comprises the following specific steps:
firstly, cutting off the damaged lower part of a damaged tundish metering nozzle 1, and then leveling a section 2 by iron rubbing;
step two, taking the same type of intact tundish sizing nozzle 3, cutting off the lower part 4 of the intact tundish sizing nozzle, and leveling the section of the lower part 4, wherein the cutting-off position is the same as the cutting-off position on the damaged tundish sizing nozzle;
step three, manufacturing an iron ring 5 with the inner diameter corresponding to the outer diameter of the section, and preparing refractory mortar and a flow blocking rod 6, wherein the flow blocking rod is formed by connecting a conical metal plug and a handle;
fourthly, blowing off oxygen generated by burning cold steel in an inner hole of a damaged tundish sizing nozzle 1, vertically bonding a lower part 4 on a section 2 of the damaged tundish sizing nozzle through refractory mortar, sleeving an iron ring 5 at one end of a plug of a flow blocking rod, tying the iron ring 5 in the middle of the flow blocking rod through a hanging rope, hanging a balance weight at the tail end of an upper handle of the flow blocking rod, vertically pressing a metal plug of the flow blocking rod into the inner hole of the nozzle of the lower part, sleeving the iron ring 5 on the periphery of the section 2, plugging a small gap between the iron ring and the outer wall of the nozzle by a thin iron sheet, and then welding the small gap by electric welding, thereby ensuring that the connected nozzle cannot overflow steel; and then 2-4 metal strips are used for connecting the iron ring with the tundish bottom shell (can be welded by electric welding), so that the connected water gap can not sink.
And step five, taking away the flow blocking rod, and burning oxygen to blow off cold steel in the inner hole of the sizing nozzle of the tundish, so that normal pouring can be continued.
The foregoing is merely a real-time illustration of the invention, which can be quickly understood and utilized by persons of ordinary skill in the art, and numerous modifications and adaptations can be made without departing from the principles of the invention.
Claims (4)
1. A method for reconnecting a fixed diameter nozzle of a tundish on line is characterized by comprising the following steps:
firstly, cutting off the damaged lower part of a damaged tundish metering nozzle (1), and then leveling a section (2);
step two, taking the same model of intact tundish sizing nozzle (3), cutting off the lower part (4) of the intact tundish sizing nozzle, and leveling the section of the lower part (4), wherein the cutting-off position is the same as the cutting-off position on the damaged tundish sizing nozzle;
step three, manufacturing an iron ring (5) with the inner diameter corresponding to the outer diameter of the section, and preparing refractory mortar and a flow blocking rod (6), wherein the flow blocking rod is formed by connecting a conical metal plug and a handle;
fourthly, blowing off oxygen generated by burning cold steel in an inner hole of the damaged tundish sizing nozzle (1), vertically bonding the lower part (4) on the section (2) of the damaged tundish sizing nozzle through refractory mortar, then sleeving the iron ring (5) on a handle of the flow blocking rod, vertically pressing a metal plug of the flow blocking rod (6) into the inner hole of the nozzle of the lower part (4), sleeving the iron ring (5) on the periphery of the section (2), and then plugging a small gap between the iron ring and the outer wall of the nozzle by using a thin iron sheet and then welding the small gap by using electric welding, thereby ensuring that the connected nozzle cannot overflow steel;
and step five, taking away the flow blocking rod, and burning oxygen to blow off cold steel in the inner hole of the sizing nozzle of the tundish, so that normal pouring can be continued.
2. The method for reconnecting metering nozzles of a tundish in-line according to claim 1, wherein the method comprises the following steps: in the fourth step, a lifting rope is tied in the middle of the flow blocking rod, a balance weight is hung at the tail end of the handle on the flow blocking rod, and then the metal plug of the flow blocking rod (6) is vertically pressed into the inner hole of the water gap of the lower part (4).
3. The method for reconnecting metering nozzles of a tundish in-line according to claim 1, wherein the method comprises the following steps: in the fourth step, after a small gap between the iron ring and the outer wall of the water gap is plugged by a thin iron sheet and then is welded by electric welding, the iron ring and the tundish bottom shell are connected by a plurality of metal strips, so that the connected water gap is ensured not to sink.
4. A method of in-line reconnecting metering nozzles for tundishes according to claim 3, wherein: the number of the metal strips is 2-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911050498.1A CN110899684A (en) | 2019-10-31 | 2019-10-31 | Online reconnection method for sizing nozzle of tundish |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911050498.1A CN110899684A (en) | 2019-10-31 | 2019-10-31 | Online reconnection method for sizing nozzle of tundish |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110899684A true CN110899684A (en) | 2020-03-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911050498.1A Pending CN110899684A (en) | 2019-10-31 | 2019-10-31 | Online reconnection method for sizing nozzle of tundish |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02123347U (en) * | 1989-03-15 | 1990-10-11 | ||
| JPH09225605A (en) * | 1996-02-23 | 1997-09-02 | Shinagawa Refract Co Ltd | Method for recovering nozzle and the like for continuous casting and recovered nozzle and stopper |
| CN2393671Y (en) * | 1999-09-01 | 2000-08-30 | 洛阳市洛华粉体工程特种耐火材料厂 | Bracket for replacing runner gates of pouring basket of continuous caster |
| CN201189558Y (en) * | 2008-04-30 | 2009-02-04 | 鞍山热能滑动机械有限责任公司 | Immersion type device for quick alternating runner |
| CN201889434U (en) * | 2010-12-01 | 2011-07-06 | 洛阳泽川高温陶瓷有限公司 | Device for quickly mounting iron case of submerged nozzle |
| CN205851866U (en) * | 2016-08-05 | 2017-01-04 | 马鞍山江润冶金有限责任公司 | A kind of continuous casting production fast replacement system |
| CN209094542U (en) * | 2018-11-27 | 2019-07-12 | 青岛正望钢水控制股份有限公司 | A kind of long nozzle for helping to reduce nonmetal inclusion in molten steel |
-
2019
- 2019-10-31 CN CN201911050498.1A patent/CN110899684A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02123347U (en) * | 1989-03-15 | 1990-10-11 | ||
| JPH09225605A (en) * | 1996-02-23 | 1997-09-02 | Shinagawa Refract Co Ltd | Method for recovering nozzle and the like for continuous casting and recovered nozzle and stopper |
| CN2393671Y (en) * | 1999-09-01 | 2000-08-30 | 洛阳市洛华粉体工程特种耐火材料厂 | Bracket for replacing runner gates of pouring basket of continuous caster |
| CN201189558Y (en) * | 2008-04-30 | 2009-02-04 | 鞍山热能滑动机械有限责任公司 | Immersion type device for quick alternating runner |
| CN201889434U (en) * | 2010-12-01 | 2011-07-06 | 洛阳泽川高温陶瓷有限公司 | Device for quickly mounting iron case of submerged nozzle |
| CN205851866U (en) * | 2016-08-05 | 2017-01-04 | 马鞍山江润冶金有限责任公司 | A kind of continuous casting production fast replacement system |
| CN209094542U (en) * | 2018-11-27 | 2019-07-12 | 青岛正望钢水控制股份有限公司 | A kind of long nozzle for helping to reduce nonmetal inclusion in molten steel |
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Application publication date: 20200324 |