CN103691902A - Device and process for centrifugal continuous casting of metal - Google Patents
Device and process for centrifugal continuous casting of metal Download PDFInfo
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- CN103691902A CN103691902A CN201310752789.1A CN201310752789A CN103691902A CN 103691902 A CN103691902 A CN 103691902A CN 201310752789 A CN201310752789 A CN 201310752789A CN 103691902 A CN103691902 A CN 103691902A
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Abstract
The invention relates to a process and a device for centrifugal continuous casting of metal. When molten steel is poured, a round billet crystallizer performs rotary motion around a center axis at a certain rotary speed. In the process of casting, argon is fed into an argon shroud continuously, and the molten steel is injected into a uniflow tundish and then is eccentrically injected into the crystallizer via a gate. An initial solidified billet shell and a non-solidified part are drawn out from the crystallizer prior to entering a secondary cooling zone, and a supporting roll set plays a role in supporting as well as keeps cast billets to continue performing rotary motion until the cast billets are completely solidified. The device mainly comprises a steel ladle, the uniflow tundish, the pouring gate, the sealed argon shroud, a pouring platform, the round billet crystallizer, cooling jets, the supporting roll set and a billet drawing device. By the aid of the process, inclusions and segregation elements in the molten steel can be pushed to central zones of the cast billet under the action of centrifugal force, quality of the rest part of cast billets is improved, and quality of steel for the purposes of wheel steel, oil casings and the like can be improved greatly.
Description
Technical field
The method that the present invention relates to the casting of circle base, belongs to metallurgical technology field.Thereby the method is utilized crystallizer, rotation produces centrifugal force in molten steel, can make the field trash in molten steel assemble to the heart portion of strand, and the cleanliness factor at strand limit portion and middle part is improved, and organizes finer and close
metal centrifugal continuous casting device and technique thereof.
Background technology
Continuous casting technology is an advanced technology that molten steel direct pouring is shaped, and compares with traditional die casting, and continuous casting technology has the recovery rate of iron of increasing substantially, and saves the advantages such as the energy.Production high added value, high-end steel products are the important goals of steel industry always, and the quality of continuous casting billet plays an important role to the quality of following process and final products.China is iron and steel big producing country at present, but the production of high-end product is still had to a lot of weak points.For example, concerning the production of circle base, the removal of field trash can not get effective control, cannot meet the requirement that high-quality strand is produced.
Summary of the invention
In order to address the above problem, the object of this invention is to provide and a kind ofly in the molten steel solidifying, produce centrifugal force, utilize the difference of the centrifugal force that molten steel and field trash and segregation element be subject to, after making casting blank solidification completely, field trash and segregation element are finally all enriched in strand central area, and the slab quality of remainder is greatly improved
metal centrifugal continuous casting device and technique thereof.
Technical scheme of the present invention is:
metal centrifugal continuous casting device, this device comprises single current tundish, the casting mouth of a river, argon gas-sealed protective cover, casting platform, round mold, cooling jet, backing roll group, drawing device and drive unit;
The bottom eccentric position of described single current tundish arranges the described casting mouth of a river, and the inlet radius of upper end, the described casting mouth of a river is greater than the port radius that of lower end, described argon gas-sealed protective cover is arranged on the below of described single current tundish, described casting platform and described argon gas-sealed protective cover connect to form a protective cover, protective cover is arranged on the upper end of described round mold, the described casting mouth of a river extend into the porch of described round mold through described argon gas-sealed protective cover, the below of described round mold arranges described drawing device, at least one group of described cooling jet for cooling casting embryo and at least one group are set for casting the backing roll group of embryo forming between described drawing device setting and described round mold, described cooling jet and described backing roll group are set in distance, described drive unit and described round mold, backing roll group is connected with drawing device, realize described round mold, backing roll group and drawing device rotate simultaneously.
Further, described round mold is copper water mold.
Further, described backing roll group is 120 ° of angle distribution backing rolls by 3 around central shaft and forms, and described in each, backing roll is all connected and realizes rotation with described drive unit.
Another object of the present invention is to provide the casting continuous casting of molten steel technique of said apparatus, specifically comprises the following steps:
1) single current tundish and the casting mouth of a river are preheating to more than 900 ℃ opening before watering, and toast the complete casting platform top that is placed on and wait for opening and water;
2) the dummy bar dolly on casting platform is opened to round mold place, and in employing, the mode of dress is put into round mold by dummy bar, when dummy bar head arrives apart from appropriate location, round mold top, carries out dummy bar head sealing;
3) the single current tundish that molten steel is housed is placed on casting platform, and molten steel overheat is controlled between 10-50 ℃;
4) take flow continues to pass into argon gas in as 10-100L/min to argon gas-sealed protective cover,
5) start drive unit, drive round mold and drawing device to take rotating speed as 40-5000 revs/min of rotations, drive the backing roll of backing roll group to take rotating speed as 40-5000 rev/min of rotation;
6) after opening and watering, in single current tundish, molten steel is by the eccentric round mold that injects rotation in the casting mouth of a river, when its liquid level is during apart from round mold top 80mm, open stopper, while is slow pull dummy bar downwards, gradually the steel billet of moulding through cooling jet, carry out cooling, through backing roll group to the further moulding of strand, simultaneously by pulling rate rising to normal pulling rate 0.3-2.0m/min;
7) after moulding, strand departs from dummy bar after arriving drawing device, enters cutting area.
The invention has the beneficial effects as follows: owing to adopting technique scheme, the present invention overcomes existing continuous casting process cannot realize the distribution control to field trash in continuous casting of molten steel process, utilization produces centrifugal force in the molten steel solidifying, utilize the difference of the centrifugal force that molten steel and field trash and segregation element be subject to, after making casting blank solidification completely, field trash and segregation element are finally all enriched in strand central area, and the slab quality of remainder is greatly improved, and organize finer and close.
Accompanying drawing explanation
Fig. 1 is the present invention
the structural representation of metal centrifugal continuous casting device.
Fig. 2 is the A-A cross-sectional schematic of Fig. 1.
In figure:
1-ladle; 2-single current tundish; The 3-mouth of a river of casting; 4-argon gas-sealed protective cover; 5-casting platform; 6-round mold; 7-cooling jet; 8-backing roll group; 9-drawing device.
specific implementation method
below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described further.
as shown in Figure 1, metal centrifugal continuous casting device of the present invention, this device comprises single current tundish, the casting mouth of a river, argon gas-sealed protective cover, casting platform, round mold, cooling jet, backing roll group, drawing device and drive unit;
Described single current tundish, the casting mouth of a river, argon gas-sealed protective cover, casting platform, round mold and drawing device set gradually from top to bottom;
The casting mouth of a river arranges the eccentric position of single current tundish bottom, the inlet radius of casting upper end, the mouth of a river is greater than the port radius that of lower end, described argon gas-sealed protective cover is arranged on the below of described single current tundish, described casting platform and described argon gas-sealed protective cover connect to form a protective cover, the upper end that covers on round mold avoids molten steel oxidized in casting cycle, the casting mouth of a river extend into the porch of round mold through argon gas-sealed protective cover, the be set in distance lower end in round mold exit of many group cooling jets and backing roll group, drawing device is arranged on the lower end of round mold, described drive unit and described round mold, backing roll group is connected with drawing device, realize described round mold, backing roll group and drawing device rotate simultaneously.Described backing roll group is 120 ° of angle distribution backing rolls by 3 around central shaft and forms, and described in each, backing roll is all connected and realizes rotation with described drive unit.
Another object of the present invention is to provide the casting continuous casting of molten steel technique of said apparatus, specifically comprises the following steps:
1) single current tundish and the casting mouth of a river are preheating to more than 900 ℃ opening before watering, and toast the complete casting platform top that is placed on and wait for opening and water;
2) the dummy bar dolly on casting platform is opened to round mold place, and in employing, the mode of dress is put into round mold by dummy bar, when dummy bar head arrives apart from appropriate location, round mold top, carries out dummy bar head sealing;
3) the single current tundish that molten steel is housed is placed on casting platform, and molten steel overheat is controlled at 10-50 ℃;
4) take flow continues to pass into argon gas in as 10-100L/min to argon gas-sealed protective cover,
5) start drive unit, drive round mold and drawing device to take rotating speed as 40-5000 revs/min of rotations, drive the backing roll of backing roll group to take rotating speed as 40-5000 rev/min of rotation;
6) after opening and watering, in single current tundish, molten steel is by building the eccentric round mold that injects rotation in the mouth of a river, when its liquid level is during apart from round mold top 80mm, open stopper, simultaneously downward pull dummy bar is pulled out the steel billet of moulding gradually from round mold, tentatively cooling through cooling jet 7, through 8 pairs of further moulding of strand of backing roll group, simultaneously by the extremely normal pulling rate 0.3-2.0m/min of pulling rate rising;
7) after moulding, strand arrives drawing device 9 afterwards and dummy bar disengaging, enters cutting area and cuts apart through row.
Embodiment 1:
The casting spring steel (C content approximately 0.5% ~ 0.6%) of take is example, and concrete implementation step is as follows,
1) single current tundish 2 and the casting mouth of a river 3 are preheating to more than 900 ℃ opening before watering, and toast the complete casting platform top that is placed on and wait for opening and water;
2) the dummy bar dolly on casting platform is opened to round mold place, and in employing, the mode of dress is put into round mold by dummy bar, when dummy bar head arrives apart from appropriate location, round mold top, carries out dummy bar head sealing;
3) ladle 1 that molten steel is housed is placed on casting platform, and molten steel overheat is controlled at 25-35 ℃;
4) argon gas-sealed protective cover 4 is installed in casting crystallizer top 6, continues to pass into argon gas, and flow-control is in 20 L/min left and right;
5) the backing roll group 8 of round mold 6 and two cold-zones now starts rotation, and rotating speed remains on 300 revs/min.
6) after opening and watering, the molten steel in ladle 1 enters in single current tundish 2, by the eccentric round mold that injects rotation in the casting mouth of a river 3, when its liquid level is during apart from round mold top 80mm, opens stopper, pull dummy bar downwards simultaneously,
7) cooling jet 7 is started working, and now pulling rate rising is to normal pulling rate 0.5m/min;
8) strand arrives drawing device 9 afterwards and dummy bar disengaging, enters cutting area.During work, keep upper and lower rotating speed consistent, 300 revs/min of drawing device rotating speeds.
Embodiment 2:
The casting Properties of Heavy Rail Steel (the about 0.70%-0.80% of C content) of take is example, and concrete implementation step is as follows,
1) single current tundish 2 and the casting mouth of a river 3 are preheating to more than 900 ℃ opening before watering, and toast the complete casting platform top that is placed on and wait for opening and water;
2) the dummy bar dolly on casting platform is opened to crystallizer place, and in employing, the mode of dress is put into crystallizer by dummy bar, when dummy bar head arrives apart from appropriate location, crystallizer top, carries out dummy bar head sealing;
3) ladle 1 that molten steel is housed is placed on casting platform, and molten steel overheat is controlled at 20-30 ℃;
4) argon gas-sealed protective cover 4 is installed in casting crystallizer top 6, continues to pass into argon gas, and flow-control is in 50 L/min left and right;
5) the backing roll group 8 of round mold 6 and two cold-zones now starts rotation, and rotating speed remains on 1000 revs/min.
6) after opening and watering, the molten steel in ladle 1 enters in single current tundish 2, by the eccentric round mold that injects rotation in the casting mouth of a river 3, when its liquid level is during apart from round mold top 80mm, opens stopper, pull dummy bar downwards simultaneously,
7) downward pull dummy bar, cooling jet 7 is started working, and now pulling rate rising is to normal pulling rate 0.7m/min;
8) strand arrives drawing device 9 afterwards and dummy bar disengaging, enters cutting area.During work, keep upper and lower rotating speed consistent, 500 revs/min of drawing device rotating speeds.
?
Claims (4)
1. one kind
metal centrifugal continuous casting device, it is characterized in that, this device comprises single current tundish, the casting mouth of a river, argon gas-sealed protective cover, casting platform, round mold, cooling jet, backing roll group, drawing device and drive unit;
The bottom eccentric position of described single current tundish arranges the described casting mouth of a river, and the inlet radius of upper end, the described casting mouth of a river is greater than the port radius that of lower end, described argon gas-sealed protective cover is arranged on the below of described single current tundish, described casting platform and described argon gas-sealed protective cover connect to form a protective cover, protective cover is arranged on the upper end of described round mold, the described casting mouth of a river extend into the porch of described round mold through described argon gas-sealed protective cover, the below of described round mold arranges described drawing device, at least one group of described cooling jet for cooling casting embryo and at least one group are set for casting the backing roll group of embryo forming between described drawing device setting and described round mold, described cooling jet and described backing roll group are set in distance, described drive unit and described round mold, backing roll group is connected with drawing device, realize described round mold, backing roll group and drawing device rotate simultaneously.
2. as claimed in claim 1
metal centrifugal continuous casting device, it is characterized in that, described round mold is copper water mold.
3. as claimed in claim 1
metal centrifugal continuous casting device, it is characterized in that, described backing roll group is 120 ° of angle distribution backing rolls by 3 around central shaft and forms, and described in each, backing roll is all connected and realizes rotation with described drive unit.
4. the casting continuous casting of molten steel technique that use is installed as described in claim 1-3, is characterized in that, specifically comprises the following steps:
1) single current tundish and the casting mouth of a river are preheating to more than 900 ℃ opening before watering, and toast the complete casting platform top that is placed on and wait for opening and water;
2) the dummy bar dolly on casting platform is opened to round mold place, and in employing, the mode of dress is put into round mold by dummy bar, when dummy bar head arrives apart from appropriate location, round mold top, carries out dummy bar head sealing;
3) the single current tundish that molten steel is housed is placed on casting platform, and molten steel overheat is controlled at 10-50 ℃;
4) take flow continues to pass into argon gas in as 10-100L/min to argon gas-sealed protective cover,
5) start drive unit, drive round mold and drawing device to take rotating speed as 40-5000 rev/min of rotation, drive the backing roll of backing roll group to take rotating speed as 40-5000 rev/min of rotation;
6) after opening and watering, in single current tundish, molten steel is by the eccentric round mold that injects rotation in the casting mouth of a river, when its liquid level is during apart from round mold top 80mm, open stopper, simultaneously downward pull dummy bar, the strand of moulding is cooling through cooling jet gradually, and the backing roll group through rotating is to the further moulding of strand, simultaneously by the extremely normal pulling rate 0.3-2.0m/min of pulling rate rising;
7) after strand arrives drawing device, depart from dummy bar, enter cutting area and cut apart through row.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310752789.1A CN103691902A (en) | 2013-12-31 | 2013-12-31 | Device and process for centrifugal continuous casting of metal |
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| CN201310752789.1A CN103691902A (en) | 2013-12-31 | 2013-12-31 | Device and process for centrifugal continuous casting of metal |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493122A (en) * | 2014-12-05 | 2015-04-08 | 华南理工大学 | Semi-continuous casting method and device for gas pressure mould filling |
| CN108607967A (en) * | 2018-03-20 | 2018-10-02 | 昆明贵金属研究所 | A kind of preparation method of high-density iridium ingot casting |
| CN114603097A (en) * | 2022-03-22 | 2022-06-10 | 南京航空航天大学 | Low-pressure centrifugal continuous casting device and method for metal pipe |
| CN114799100A (en) * | 2022-05-05 | 2022-07-29 | 芜湖新兴铸管有限责任公司 | Continuous casting large round billet casting method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104493122A (en) * | 2014-12-05 | 2015-04-08 | 华南理工大学 | Semi-continuous casting method and device for gas pressure mould filling |
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| CN114603097A (en) * | 2022-03-22 | 2022-06-10 | 南京航空航天大学 | Low-pressure centrifugal continuous casting device and method for metal pipe |
| CN114603097B (en) * | 2022-03-22 | 2022-11-18 | 南京航空航天大学 | Low-pressure centrifugal continuous casting device and method for metal pipe |
| CN114799100A (en) * | 2022-05-05 | 2022-07-29 | 芜湖新兴铸管有限责任公司 | Continuous casting large round billet casting method |
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Application publication date: 20140402 |