CN114799096A - Horizontal continuous casting furnace and rapid furnace starting method - Google Patents
Horizontal continuous casting furnace and rapid furnace starting method Download PDFInfo
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- CN114799096A CN114799096A CN202210535966.XA CN202210535966A CN114799096A CN 114799096 A CN114799096 A CN 114799096A CN 202210535966 A CN202210535966 A CN 202210535966A CN 114799096 A CN114799096 A CN 114799096A
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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
- B22D11/045—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for horizontal casting
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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
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B15/00—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
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Abstract
The invention discloses a horizontal continuous casting furnace and a rapid furnace starting method, wherein the horizontal continuous casting furnace comprises a smelting furnace, a smelting channel and a holding furnace, wherein the smelting furnace is divided into a storage chamber and a smelting chamber, the storage chamber is sleeved with a column-shaped coil assembly, the smelting chamber is sleeved with a circular coil assembly, the upper end surface and the lower end surface of the smelting chamber are respectively provided with an upper disc-shaped coil assembly and a lower disc-shaped coil assembly, the smelting channel is sleeved with a first holding coil, the lower part of the holding furnace is sleeved with a second holding coil assembly, the upper part of the holding furnace is sleeved with a third holding coil assembly, a smelting furnace mouth and a holding furnace mouth are respectively provided with a first furnace cover and a second furnace cover, and the tail end of the holding furnace is provided with a crystallizer assembly. The invention adopts the superposed magnetic fields generated by the coils with different structures to replace the single magnetic field generated by the spiral coil, thereby weakening the erosion phenomenon of the incompletely melted metal solid-liquid mixture to the refractory layer in the smelting process, prolonging the service life of the horizontal continuous casting furnace and improving the working safety.
Description
Technical Field
The invention relates to the field of horizontal continuous casting, in particular to a horizontal continuous casting furnace and a rapid furnace starting method.
Background
Induction heating has the advantages of green and energy saving, so that an induction heating device is usually adopted to smelt raw materials in the horizontal continuous casting production process of copper pipes. The induction eddy current generates huge heat energy to melt solid raw materials, and meanwhile, the electromagnetic field has the function of stirring molten metal, so that the quality of the casting blank is improved. However, the induced eddy current has a skin effect, and therefore, the melting process of the raw materials is a heat conduction process requiring time, and all the raw materials cannot be melted at the same time, so that some metal particles and metal blocks inevitably appear in the melting process, and the metal particles and the metal blocks form a swirling motion under the action of the alternating magnetic field, so that the refractory layer is eroded continuously, the service life of the refractory layer is influenced, and the production cost is increased.
Disclosure of Invention
The main purpose of the present invention is to overcome at least one of the above drawbacks of the prior art, and to provide a horizontal continuous casting furnace and a rapid furnace start method, in which superimposed magnetic fields with different directions and/or different strengths generated by coils with different structures are used instead of a single magnetic field generated by a spiral coil, so as to reduce erosion of a refractory layer by an incompletely melted metal solid-liquid mixture during a melting process, thereby improving the service life and the working safety of the horizontal continuous casting furnace.
The purpose of the invention is realized by the following technical scheme: a horizontal continuous casting furnace mainly comprises a smelting furnace, a smelting channel and a heat preservation furnace, wherein the smelting furnace and the heat preservation furnace are communicated through the smelting channel, a furnace mouth of the smelting furnace is provided with a first furnace cover, a furnace mouth of the heat preservation furnace is provided with a second furnace cover, the first furnace cover and the second furnace cover are respectively provided with an inert gas pressurizing hole (a deoxidizer and an inert gas are applied to prevent copper liquid from being oxidized in the processes of smelting and heat preservation, the furnace pressure is controlled to be 100-250 bar), the smelting furnace is divided into a storage chamber and a smelting chamber, the storage chamber is sleeved with a column-shaped coil assembly, the smelting chamber is sleeved with a circular coil assembly, the upper end surface and the lower end surface of the smelting chamber are respectively provided with an upper disc-shaped coil assembly and a lower disc-shaped coil assembly, the smelting channel is sleeved with a first heat preservation coil, the lower part of the heat preservation furnace is sleeved with a second heat preservation coil assembly, the upper part of the heat preservation furnace is sleeved with a third heat preservation coil assembly, an X-ray camera is arranged under the smelting furnace, and a crystallizer component is arranged at the tail end of the heat preservation furnace.
Preferably, the columnar coil assembly is composed of a columnar coil, a first magnetizer, a first support and a sleeper, the first support and the sleeper are circular rings, the first support is sleeved on the upper portion and the lower portion of the columnar coil respectively, the first magnetizer is arrayed inside the columnar coil, the sleeper is arranged at the bottom of the columnar coil, and the columnar coil assembly is placed on the upper end face of the smelting chamber through the sleeper.
Preferably, the upper disc-shaped coil assembly is composed of a first disc-shaped coil, a second support, a second disc-shaped coil, a third support, a fourth support, a second magnetizer and a third magnetizer, the second support and the third support are ring-shaped, the fourth support is strip-shaped, the upper disc-shaped coil assembly sequentially comprises the first disc-shaped coil and the second disc-shaped coil from outside to inside, the first disc-shaped coil is arranged on the lower end face of the second support, the second magnetizer is arranged in the first disc-shaped coil, the second disc-shaped coil is arranged on the lower end face of the third support, the third magnetizer is arranged in the second disc-shaped coil, and the second support and the third support are connected through the two fourth supports.
Preferably, the circular coil assembly comprises a first circular coil, a gasket, a second circular coil, a third circular coil, a fourth circular coil, a fifth circular coil and a fifth support, the fifth support is in a strip shape, and the circular coil assembly sequentially comprises the first circular coil, the gasket, the second circular coil, the gasket, the third circular coil, the gasket, the fourth circular coil, the gasket and the fifth circular coil from top to bottom and is fixedly connected with the first circular coil, the gasket, the second circular coil, the gasket, the third circular coil, the gasket, the fourth circular coil, the gasket and the fifth circular coil through three fifth supports.
Preferably, the lower disc-shaped coil assembly is composed of a third disc-shaped coil, a sixth support, a fourth disc-shaped coil, a seventh support, an eighth support, a ninth support, a fifth disc-shaped coil, a tenth support, a sixth disc-shaped coil, a fourth magnetizer, a fifth magnetizer, a sixth magnetizer and a seventh magnetizer, the sixth support, the seventh support and the tenth support are ring-shaped, the eighth support is strip-shaped, the ninth support is disk-shaped, the lower disc-shaped coil assembly sequentially comprises the third disc-shaped coil, the fourth disc-shaped coil, the fifth disc-shaped coil and the sixth disc-shaped coil from outside to inside, the third disc-shaped coil is arranged on the lower end face of the sixth support, the fourth disc-shaped coil is arranged in the third disc-shaped coil, the fourth disc-shaped coil is arranged on the lower end face of the seventh support, the fifth disc-shaped coil is arranged in the fourth disc-shaped coil, the lower end face of the tenth support is provided with the fifth disc-shaped coil, a sixth magnetizer is arrayed inside the fifth disc-shaped coil, the lower end face of the ninth support is provided with the sixth disc-shaped coil, a seventh magnetizer is arranged inside the sixth disc-shaped coil, and the sixth support, the seventh support, the ninth support and the tenth support are connected through one eighth support.
Preferably, the second heat-insulating coil assembly is composed of a second heat-insulating coil and an eleventh bracket, the eleventh bracket is in a strip shape, the second heat-insulating coil assembly is in a symmetrical structure, and the symmetrical part is composed of one eleventh bracket and one second heat-insulating coil fixed on the eleventh bracket.
Preferably, the third heat-insulating coil assembly is composed of a third heat-insulating coil and a twelfth support, the third heat-insulating coil is spiral, the twelfth support is strip-shaped, and the third heat-insulating coil is fixed by four twelfth supports.
Preferably, the first bracket, the second bracket, the third bracket, the fourth bracket, the fifth bracket, the sixth bracket, the seventh bracket, the eighth bracket, the ninth bracket, the tenth bracket, the eleventh bracket, the twelfth bracket, the crosstie, and the spacer are made of a high temperature resistant insulating material.
Preferably, the column-shaped coil, the first disc-shaped coil, the second disc-shaped coil, the third disc-shaped coil, the fourth disc-shaped coil, the fifth disc-shaped coil, the sixth disc-shaped coil, the first circular coil, the second circular coil, the third circular coil, the fourth circular coil, the fifth circular coil, the first heat-insulating coil, the second heat-insulating coil and the third heat-insulating coil are all formed by winding hollow copper tubes, and are provided with a cooling water inlet, a cooling water outlet and a binding post.
The invention also provides a quick start method of the horizontal continuous casting furnace, which comprises the following steps:
s1, starting the smelting furnace cylindrical coil assembly, the upper disc type coil assembly, the circular coil assembly and the lower disc type coil assembly for coil cooling, setting the cooling water flow to be 80-120L/min, starting the first disc type coil of the upper disc type coil assembly and the third disc type coil of the lower disc type coil assembly, setting the power to be 225-250 kW, and rapidly melting the solid copper in the dangerous area;
s2, after the solid-liquid interface moves to the identification area, reducing the power of the first disc coil of the upper disc-type coil assembly and the power of the third disc coil of the lower disc-type coil assembly to 20-30 kW, reducing the flow of cooling water to 60-80L/min, starting the column-type coil assembly of the smelting furnace and the second disc coil of the upper disc-type coil assembly, and setting the power to 20-30 kW to form a copper liquid lubricating film of 4-8 mm between the whole copper block and the furnace wall;
s3, starting a fourth disc-shaped coil, a fifth disc-shaped coil, a sixth disc-shaped coil and a circular coil component of a lower disc-shaped coil component of the smelting furnace, gradually melting solid copper in an identification area and a safety area of the smelting chamber, moving a solid-liquid interface to the safety area, and forming an inverted cone-shaped solid-liquid interface;
s4, starting an X-ray camera, monitoring the sizes of the cracked copper blocks in the identification area and the dangerous area and the number of times of impact of the cracked copper blocks on the erosion area:
s41, judging whether a copper block with the diameter exceeding 60mm exists in the identification area, if so, sequentially reducing the power of each coil of the circular coil assembly by 30-50 kW, increasing the power of a second coil of the upper disc type coil assembly and the power of a fourth coil of the lower disc type coil assembly to 225-250 kW, continuing to step S42, and if not, turning to step S5;
s42, judging whether a copper block with the diameter exceeding 40mm exists in the dangerous area, if so, closing the circular coil assembly, increasing the power of the first coil of the upper disc-type coil assembly and the power of the third coil of the lower disc-type coil assembly to 200-225 kW, continuing to step S43, and if not, turning to step S5;
s43, judging whether the number of times that the refractory layer in the erosion area is impacted by the copper block with the diameter exceeding 40mm reaches 200 times, if so, starting an early warning program, stopping production, maintaining equipment, changing a smelting chamber, turning to the step S1, and if not, turning to the step S4;
s5, starting the first heat preservation coil of the melting channel and the coils of the second heat preservation coil assembly and the third heat preservation coil assembly of the heat preservation furnace to cool, setting the flow rate of cooling water to be 40-60L/min, starting the first heat preservation coil of the melting channel and the second heat preservation coil assembly and the third heat preservation coil assembly of the heat preservation furnace to preserve heat of copper liquid, setting the temperature of the heat preservation to be 1150-1350 ℃, preserving the heat for 0.4-0.8 h after the copper liquid level of the melting furnace and the heat preservation furnace is consistent, then carrying out horizontal continuous casting production, and starting to pull a casting billet when the temperature of the copper liquid in the crystallizer assembly reaches the casting temperature.
Preferably, in the step S3, the power of the first circular coil (501), the second circular coil (503), the third circular coil (504), the fourth circular coil (505) and the fifth circular coil (506) in the circular coil assembly (5) is set to 60 to 80kW, 80 to 100kW, 100 to 120kW, 120 to 140kW and 140 to 160kW in sequence.
Preferably, in step S3, the power of the third disc-shaped coil (601), the fourth disc-shaped coil (603), the fifth disc-shaped coil (607), and the sixth disc-shaped coil (609) in the lower disc-shaped coil assembly (6) is set to 20 to 30kW, and 10 to 20kW in this order.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention adopts the superposed magnetic fields with different directions generated by the coils with different structures to replace the single magnetic field generated by the spiral coil, and eliminates the large-size metal block threatening the refractory layer of the smelting furnace in time through the superposed magnetic fields, thereby weakening the erosion phenomenon of the metal solid-liquid mixture to the refractory layer, prolonging the service life of the smelting furnace and reducing the incidence rate of metal liquid leakage accidents.
2. The invention utilizes the superposed magnetic fields with different directions and strengths generated by the coils with different structures to enable the integral copper block to form a bullet head shape with a downward plumb, and the inverted cone-shaped solid-liquid interface enables the integral copper block to be pressed and cracked into small metal blocks under the action of self gravity, thereby greatly improving the solid-liquid contact area and the smelting speed, and further improving the starting speed of a horizontal continuous casting furnace.
3. The invention adopts an X-ray camera to monitor and identify the size of the cracked metal block in the molten metal in the area, thereby providing data reference for eliminating the cracked metal block with overlarge size by superposing a magnetic field and recording the number of times of the impact of the large-size metal block on the refractory layer in the erosion area in real time, thereby abandoning the production mode based on the experience of workers in the prior art and improving the safety of the horizontal continuous casting process of the copper pipe.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a flow chart of a method for quickly starting a horizontal continuous casting furnace disclosed by the invention;
FIG. 2 is a schematic view of a horizontal continuous casting furnace according to the present invention;
FIG. 3a is a schematic structural diagram of a cylindrical coil assembly of the horizontal continuous casting furnace disclosed by the invention;
FIG. 3b is a schematic structural diagram of a disc-shaped coil assembly of the horizontal continuous casting furnace according to the present invention;
FIG. 3c is a schematic view of a horizontal continuous casting furnace circular coil assembly according to the present disclosure;
FIG. 3d is a schematic structural view of a lower disc coil assembly of the horizontal continuous casting furnace according to the present invention;
FIG. 3e is a schematic structural view of a second heat-retaining coil assembly of the horizontal continuous casting furnace disclosed in the present invention;
FIG. 3f is a schematic structural view of a third heat-insulating coil assembly of the horizontal continuous casting furnace disclosed by the invention;
FIG. 4 is a schematic view of the disclosed method for rapidly starting the horizontal continuous casting furnace;
reference numbers in the figures: 1. a first furnace cover; 2. a cylindrical coil assembly; 201. a columnar coil; 202. a first magnetizer; 203. a first bracket; 204. crossties; 3. a smelting furnace; 301. a storage chamber; 302. a smelting chamber; 4. an upper disc coil assembly; 401. a first disk-shaped coil; 402. a second bracket; 403. a second disc-shaped coil; 404. a third support; 405. a fourth bracket; 406. a second magnetizer; 407. a third magnetizer; 5. a circular coil assembly; 501. a first circular coil; 502. a gasket; 503. a second circular coil; 504. a third circular coil; 505. a fourth circular coil; 506. a fifth circular coil; 507. a fifth support; 6. a lower disc type coil assembly; 601. a third disc-shaped coil; 602. a sixth support; 603. a fourth disk-shaped coil; 604. a seventh support; 605. an eighth bracket; 606. a ninth support; 607. a fifth disc-shaped coil; 608. a tenth bracket; 609. a sixth disc-shaped coil; 610. a fourth magnetizer; 611. a fifth magnetizer; 612. a sixth magnetizer; 613. a seventh magnetizer; 7. an X-ray camera; 8. a first heat-insulating coil; 9. melting; 10. a second heat-insulating coil assembly; 1001. a second heat-insulating coil; 1002. an eleventh bracket; 11. a crystallizer component; 12. a holding furnace; 13. a third heat-insulating coil assembly; 1301. a twelfth bracket; 1302. a third heat-insulating coil; 14. a second furnace cover; 15. an erosion zone; 16. a hazard zone; 17. an identification area; 18. a security zone.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate directions or positional relationships based on those shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
A horizontal continuous casting furnace is mainly composed of a smelting furnace 3, a melting channel 9 and a heat preservation furnace 12, wherein the smelting furnace 3 is communicated with the heat preservation furnace 12 through the melting channel 9, a first furnace cover 1 is arranged at a furnace mouth of the smelting furnace 3, a second furnace cover 14 is arranged at a furnace mouth of the heat preservation furnace 12, argon pressurizing holes (a deoxidizing agent and argon are conveniently applied in the smelting and heat preservation processes to prevent copper liquid from being oxidized, the furnace pressure is controlled to be 100-250 bar), the smelting furnace 3 is divided into a storage chamber 301 and a smelting chamber 302, the storage chamber 301 is sleeved with a column-shaped coil assembly 2, the smelting chamber 302 is sleeved with a circular coil assembly 5, the upper end face and the lower end face of the smelting chamber 302 are respectively provided with an upper disc-shaped coil assembly 4 and a lower disc-shaped coil assembly 6, the melting channel 9 is sleeved with a first heat preservation coil 8, the lower part of the heat preservation furnace 12 is sleeved with a second heat preservation coil assembly 10, the upper part of the heat preservation furnace 12 is sleeved with a third heat preservation coil assembly 13, an X-ray camera 7 is arranged under the smelting furnace 3, and a crystallizer component 11 is arranged at the tail end of the holding furnace 12.
As shown in fig. 3a, the columnar coil assembly 2 is composed of a columnar coil 201, a first magnetizer 202, a first support 203 and a tie 204, the first support 203 and the tie 204 are circular, the upper part and the lower part of the columnar coil 201 are respectively sleeved with the first support 203, the first magnetizer 202 is arrayed inside the columnar coil 201, the tie 204 is arranged at the bottom of the columnar coil 201, and the columnar coil assembly 2 is placed on the upper end surface of the melting chamber 302 through the tie 204.
As shown in fig. 3b, the upper disc coil assembly 4 is composed of a first disc coil 401, a second bracket 402, a second disc coil 403, a third bracket 404, a fourth bracket 405, a second magnetizer 406 and a third magnetizer 407, the second bracket 402 and the third bracket 404 are circular, the fourth bracket 405 is strip-shaped, the upper disc coil assembly 4 sequentially includes the first disc coil 401 and the second disc coil 403 from outside to inside, the lower end surface of the second bracket 402 is provided with the first disc coil 401, the second magnetizer 406 is arrayed inside the first disc coil 401, the lower end surface of the third bracket 404 is provided with the second disc coil 403, the third magnetizer 407 is arrayed inside the second disc coil 403, and the second bracket 402 and the third bracket 404 are connected by two fourth brackets 405.
As shown in fig. 3c, the circular coil assembly 5 is composed of a first circular coil 501, a spacer 502, a second circular coil 503, a third circular coil 504, a fourth circular coil 505, a fifth circular coil 506 and a fifth support 507, the fifth support 507 is a strip, the circular coil assembly 5 is composed of the first circular coil 501, the spacer 502, the second circular coil 503, the spacer 502, the third circular coil 504, the spacer 502, the fourth circular coil 505, the spacer 502 and the fifth circular coil 506 from top to bottom in sequence, and is fixedly connected by three fifth supports 507.
As shown in fig. 3d, the lower disc-type coil assembly 6 is composed of a third disc-type coil 601, a sixth support 602, a fourth disc-type coil 603, a seventh support 604, an eighth support 605, a ninth support 606, a fifth disc-type coil 607, a tenth support 608, a sixth disc-type coil 609, a fourth magnetizer 610, a fifth magnetizer 611, a sixth magnetizer 612, and a seventh magnetizer 613, the sixth support 602, the seventh support 604, and the tenth support 608 are circular ring-shaped, the eighth support 605 is strip-shaped, the ninth support 606 is circular pie-shaped, the lower disc-type coil assembly 6 is sequentially provided with the third disc-type coil 601, the fourth disc-type coil 603, the fifth disc-type coil 607, and the sixth disc-type coil 609 from the outside to the inside, the lower end surface of the sixth support 602 is provided with the third disc-type coil 601, the third disc-type coil 601 is arrayed with the fourth magnetizer 610 inside the seventh support 601, the fourth disc-type coil 603 is arranged with the fourth disc-type coil 603, and the fifth disc-type coil 603, a fifth disk-shaped coil 607 is arranged on the lower end surface of the tenth bracket 608, a sixth magnetizer 612 is arrayed inside the fifth disk-shaped coil 607, a sixth disk-shaped coil 609 is arranged on the lower end surface of the ninth bracket 606, a seventh magnetizer 613 is arranged inside the sixth disk-shaped coil 609, and the sixth bracket 602, the seventh bracket 604, the ninth bracket 606 and the tenth bracket 608 are connected through an eighth bracket 605.
As shown in fig. 3e, the second thermal insulation coil assembly 10 is composed of a second thermal insulation coil 1001 and an eleventh support 1002, the eleventh support 1002 is in a bar shape, the second thermal insulation coil assembly 10 is in a symmetrical structure, and the symmetrical portion is composed of one eleventh support 1002 and one second thermal insulation coil 1001 fixed thereon.
As shown in fig. 3f, the third thermal insulation coil assembly 13 is composed of a third thermal insulation coil 1302 and a twelfth support 1301, wherein the third thermal insulation coil 1302 is spiral, the twelfth support 1301 is strip-shaped, and the third thermal insulation coil 1302 is fixed by four twelfth supports 1301.
Specifically, the first bracket 203, the second bracket 402, the third bracket 404, the fourth bracket 405, the fifth bracket 507, the sixth bracket 602, the seventh bracket 604, the eighth bracket 605, the ninth bracket 606, the tenth bracket 608, the eleventh bracket 1002, the twelfth bracket 1301, and the crosstie 204 are made of a phenolic resin material, and the spacer 502 is made of a mica material.
More specifically, the cylindrical coil 201, the first disc-shaped coil 401, the second disc-shaped coil 403, the third disc-shaped coil 601, the fourth disc-shaped coil 603, the fifth disc-shaped coil 607, the sixth disc-shaped coil 609, the first circular coil 501, the second circular coil 503, the third circular coil 504, the fourth circular coil 505, the fifth circular coil 506, the first heat-insulating coil 8, the second heat-insulating coil 1001 and the third heat-insulating coil 1302 are all formed by winding hollow copper pipes, and are all provided with a cooling water inlet, a cooling water outlet and a binding post.
In a preferred embodiment of the present invention, a method for quickly starting a horizontal continuous casting furnace, as shown in fig. 1 and 4, comprises the following steps:
s1, starting a smelting furnace 3, cooling coils of the cylindrical coil assembly 2, the upper disc-type coil assembly 4, the circular coil assembly 5 and the lower disc-type coil assembly 6, setting the flow rate of cooling water to be 100L/min, starting a first disc-type coil 401 of the upper disc-type coil assembly 4 and a third disc-type coil 601 of the lower disc-type coil assembly 6, setting the power to be 230kW, and rapidly melting solid metal in the dangerous area 16;
s2, after the solid-liquid interface moves to the identification area 17, reducing the power of the first coil 401 of the upper coil assembly 4 and the third coil 601 of the lower coil assembly 6 to 25kW, reducing the cooling water flow to 70L/min, starting the smelting furnace 3 and the cylindrical coil assembly 2 of the upper coil assembly 4 and the second coil 403 of the upper coil assembly 4, wherein the power is set to 25kW, and forming a 6mm copper liquid lubricating film between the whole metal block and the furnace wall of the smelting furnace 3;
s3, starting the smelting furnace 3, namely, the lower disc type coil assembly 6, the fourth disc type coil 603, the fifth disc type coil 607, the sixth disc type coil 609 and the circular coil assembly 5, gradually melting the solid metal in the identification area 17 and the safety area 18 of the smelting chamber 302, moving the solid-liquid interface to the safety area 18, and forming an inverted cone-shaped solid-liquid interface;
s4, starting the X-ray camera 7, and monitoring the sizes of the fractured metal blocks in the identification area 17 and the dangerous area 16 and the times of the impact of the fractured metal blocks on the erosion area 15:
s41, judging whether a metal block with the diameter exceeding 60mm exists in the identification area 17, if so, sequentially reducing the power of each coil of the circular coil assembly 5 by 40kW, increasing the power of the second disc coil 403 of the upper disc type coil assembly 4 and the fourth disc coil 603 of the lower disc type coil assembly 6 to 230kW, continuing the step S42, and if not, turning to the step S5;
s42, judging whether a metal block with the diameter exceeding 40mm exists in the danger area 16, if so, closing the circular coil assembly 5, increasing the power of the first coil 401 of the upper disc-type coil assembly 4 and the third coil 601 of the lower disc-type coil assembly 6 to 210kW, continuing to step S43, and if not, turning to step S5;
s43, judging whether the number of times that the refractory layer of the erosion area 15 is impacted by the metal block with the diameter exceeding 40mm reaches 200 times, if so, starting an early warning program, stopping production, maintaining equipment, changing the smelting chamber 302, turning to the step S1, and if not, turning to the step S4;
s5, starting the first heat preservation coil 8 of the melting channel 9 and the coils of the second heat preservation coil assembly 10 and the third heat preservation coil assembly 13 of the heat preservation furnace 12 for cooling, setting the flow rate of cooling water to be 50L/min, starting the first heat preservation coil 8 of the melting channel 9 and the second heat preservation coil assembly 10 of the heat preservation furnace 12 and the third heat preservation coil assembly 13 of the heat preservation furnace 12, preserving heat of copper liquid, setting the heat preservation temperature to be 1150-1350 ℃, preserving heat for 0.6h after the copper liquid level heights of the melting furnace 3 and the heat preservation furnace 12 are consistent, then carrying out horizontal continuous casting production of a copper pipe, and starting to pull a casting ingot when the copper liquid temperature in the crystallizer assembly 11 reaches the casting temperature.
Further, in step S3, the power of the first circular coil 501, the second circular coil 503, the third circular coil 504, the fourth circular coil 505, and the fifth circular coil 506 in the circular coil assembly 5 is sequentially set to 70kW, 90kW, 110kW, 130kW, and 150kW to provide a magnetic field whose strength is gradually increased from top to bottom, so that the erosion of the solid-liquid interface by the molten metal is gradually increased to form an inverted cone-shaped solid-liquid interface.
Further, in step S3, the power of the third disc-shaped coil 601, the fourth disc-shaped coil 603, the fifth disc-shaped coil 607, and the sixth disc-shaped coil 609 in the lower disc-shaped coil assembly 6 is set to 25kW, and 15kW in this order to assist the solid-liquid interface to form the reverse taper type.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A horizontal continuous casting furnace comprises a smelting furnace (3), a smelting channel (9) and a heat preservation furnace (12), and is characterized in that the smelting furnace (3) and the heat preservation furnace (12) are communicated through the smelting channel (9), a first furnace cover (1) is arranged at a furnace mouth of the smelting furnace (3), a second furnace cover (14) is arranged at a furnace mouth of the heat preservation furnace (12), inert gas pressurizing holes are formed in the first furnace cover (1) and the second furnace cover (14), the smelting furnace (3) is divided into a storage chamber (301) and a smelting chamber (302), a column-shaped coil assembly (2) is sleeved on the storage chamber (301), a circular coil assembly (5) is sleeved on the smelting chamber (302), an upper disc-shaped coil assembly (4) and a lower disc-shaped coil assembly (6) are respectively arranged on the upper end surface and the lower end surface of the smelting chamber (302), a first heat preservation coil (8) is sleeved on the smelting channel (9), the lower part of the holding furnace (12) is sleeved with a second holding coil assembly (10), the upper part of the holding furnace (12) is sleeved with a third holding coil assembly (13), an X-ray camera (7) is arranged under the smelting furnace (3), and the tail end of the holding furnace (12) is provided with a crystallizer assembly (11).
2. The horizontal continuous casting furnace according to claim 1, wherein the columnar coil assembly (2) is composed of a columnar coil (201), a first magnetizer (202), a first bracket (203) and a sleeper (204), the first bracket (203) and the sleeper (204) are circular, the first bracket (203) is sleeved on the upper portion and the lower portion of the columnar coil (201), the first magnetizer (202) is arrayed inside the columnar coil (201), the sleeper (204) is arranged at the bottom of the columnar coil (201), and the columnar coil assembly (2) is placed on the upper end face of the smelting chamber (302) through the sleeper (204).
3. The horizontal continuous casting furnace according to claim 1, wherein the upper disc-shaped coil assembly (4) is composed of a first disc-shaped coil (401), a second bracket (402), a second disc-shaped coil (403), a third bracket (404), a fourth bracket (405), a second magnetizer (406) and a third magnetizer (407), the second bracket (402) and the third bracket (404) are circular ring-shaped, the fourth bracket (405) is strip-shaped, the upper disc-shaped coil assembly (4) is composed of the first disc-shaped coil (401) and the second disc-shaped coil (403) in sequence from outside to inside, the lower end surface of the second bracket (402) is provided with the first disc-shaped coil (401), the first disc-shaped coil (401) is internally provided with the second magnetizer (406), the lower end surface of the third bracket (404) is provided with the second disc-shaped coil (403), a third magnetizer (407) is arrayed inside the second disc-shaped coil (403), and the second bracket (402) is connected with the third bracket (404) through two fourth brackets (405);
the lower disc-type coil assembly (6) consists of a third disc-type coil (601), a sixth support (602), a fourth disc-type coil (603), a seventh support (604), an eighth support (605), a ninth support (606), a fifth disc-type coil (607), a tenth support (608), a sixth disc-type coil (609), a fourth magnetizer (610), a fifth magnetizer (611), a sixth magnetizer (612) and a seventh magnetizer (613), the sixth support (602), the seventh support (604) and the tenth support (608) are of a circular ring type, the eighth support (605) is of a strip type, the ninth support (606) is of a circular-disc type, and the lower disc-type coil assembly (6) sequentially comprises the third disc-type coil (601), the fourth disc-type coil (603), the fifth disc-type coil (607) and the sixth disc-type coil (609) from outside to inside, the lower end surface of the sixth bracket (602) is provided with the third disc-shaped coil (601), a fourth magnetizer (610) is arrayed inside the third disc-shaped coil (601), the lower end surface of the seventh bracket (604) is provided with the fourth disc-shaped coil (603), a fifth magnetizer (611) is arrayed inside the fourth disc-shaped coil (603), the lower end surface of the tenth bracket (608) is provided with the fifth disc-shaped coil (607), a sixth magnetizer (612) is arrayed inside the fifth disc-shaped coil (607), the lower end surface of the ninth bracket (606) is provided with the sixth disc-shaped coil (609), a seventh magnetizer (613) is arranged inside the sixth disc-shaped coil (609), and the sixth bracket (602), the seventh bracket (604), the ninth bracket (606) and the tenth bracket (608) are connected through one eighth bracket (605).
4. The horizontal continuous casting furnace according to claim 1, wherein the circular coil assembly (5) is composed of a first circular coil (501), a spacer (502), a second circular coil (503), a third circular coil (504), a fourth circular coil (505), a fifth circular coil (506) and a fifth support (507), the fifth support (507) is a bar type, and the circular coil assembly (5) is composed of the first circular coil (501), the spacer (502), the second circular coil (503), the spacer (502), the third circular coil (504), the spacer (502), the fourth circular coil (505), the spacer (502) and the fifth circular coil (506) from top to bottom in sequence and is fixedly connected through three fifth supports (507).
5. The horizontal continuous casting furnace according to claim 1, wherein the second heat-insulating coil assembly (10) is composed of a second heat-insulating coil (1001) and an eleventh frame (1002), the eleventh frame (1002) is in the shape of a bar, the second heat-insulating coil assembly (10) is in a symmetrical structure, and the symmetrical portion is composed of one of the eleventh frames (1002) fixing one of the second heat-insulating coils (1001);
the third heat-preservation coil assembly (13) is composed of a third heat-preservation coil (1302) and a twelfth support (1301), the third heat-preservation coil (1302) is in a spiral shape, the twelfth support (1301) is in a strip shape, and the third heat-preservation coil (1302) is fixed by four twelfth supports (1301).
6. The horizontal continuous casting furnace according to claim 1, wherein the first bracket (203), the second bracket (402), the third bracket (404), the fourth bracket (405), the fifth bracket (507), the sixth bracket (602), the seventh bracket (604), the eighth bracket (605), the ninth bracket (606), the tenth bracket (608), the eleventh bracket (1002), the twelfth bracket (1301), the crosstie (204), and the gasket (502) are all made of a high temperature resistant insulating material.
7. The horizontal continuous casting furnace according to claim 1, wherein the column-shaped coil (201), the first disc-shaped coil (401), the second disc-shaped coil (403), the third disc-shaped coil (601), the fourth disc-shaped coil (603), the fifth disc-shaped coil (607), the sixth disc-shaped coil (609), the first circular coil (501), the second circular coil (503), the third circular coil (504), the fourth circular coil (505), the fifth circular coil (506), the first heat-insulating coil (8), the second heat-insulating coil (1001) and the third heat-insulating coil (1302) are all made of hollow copper tubes and are provided with cooling water inlets, cooling water outlets and binding posts.
8. The method for quickly starting a horizontal continuous casting furnace according to any one of claims 1 to 7, comprising the steps of:
s1, starting a smelting furnace (3), cooling the cylindrical coil assembly (2), the upper disc-shaped coil assembly (4), the circular coil assembly (5) and the lower disc-shaped coil assembly (6), setting the cooling water flow to be 80-120L/min, starting a first disc-shaped coil (401) of the upper disc-shaped coil assembly (4) and a third disc-shaped coil (601) of the lower disc-shaped coil assembly (6), setting the power to be 225-250 kW, and rapidly melting solid metal in the dangerous area (16);
s2, after the solid-liquid interface moves to the identification area (17), reducing the power of a first disc coil (401) of the upper disc-shaped coil assembly (4) and a third disc coil (601) of the lower disc-shaped coil assembly (6) to 20-30 kW, reducing the flow rate of cooling water to 60-80L/min, starting a columnar coil assembly (2) of the smelting furnace (3) and a second disc coil (403) of the upper disc-shaped coil assembly (4), and setting the power to 20-30 kW to form a copper liquid lubricating film of 4-8 mm between the whole metal block and the furnace wall of the smelting furnace (3);
s3, starting a smelting furnace (3), namely, starting a lower disc type coil assembly (6), namely, a fourth disc type coil (603), a fifth disc type coil (607), a sixth disc type coil (609) and a circular coil assembly (5), gradually melting solid metals in an identification area (17) and a safety area (18) of a smelting chamber (302), moving a solid-liquid interface to the safety area (18), and forming an inverted cone type solid-liquid interface;
s4, starting the X-ray camera (7), monitoring the sizes of the broken metal blocks of the identification area (17) and the danger area (16) and the number of times of the broken metal blocks of the erosion area (15):
s41, judging whether a metal block with the diameter exceeding 60mm exists in the identification area (17), if so, sequentially reducing the power of each coil of the circular coil assembly (5) by 30-50 kW, increasing the power of a second disk coil (403) of the upper disk-shaped coil assembly (4) and a fourth disk coil (603) of the lower disk-shaped coil assembly (6) to 225-250 kW, continuing the step S42, and if not, turning to the step S5;
s42, judging whether a metal block with the diameter exceeding 40mm exists in the dangerous area (16), if so, closing the circular coil assembly (5), increasing the power of a first disc coil (401) of the upper disc type coil assembly (4) and a third disc type coil (601) of the lower disc type coil assembly (6) to 200-225 kW, continuing to step S43, and if not, turning to step S5;
s43, judging whether the number of times that the refractory layer of the erosion area (15) is impacted by the metal block with the diameter exceeding 40mm reaches 200 times, if so, starting an early warning program, stopping production, maintaining equipment, and turning to the step S1 after the smelting chamber (302) is replaced, otherwise, turning to the step S4;
s5, starting a first heat preservation coil (8) of a melting channel (9), cooling coils of a second heat preservation coil assembly (10) and a third heat preservation coil assembly (13) of a heat preservation furnace (12), setting the flow rate of cooling water to be 40-60L/min, starting the first heat preservation coil (8) of the melting channel (9), the second heat preservation coil assembly (10) and the third heat preservation coil assembly (13) of the heat preservation furnace (12), preserving heat of copper liquid, setting the heat preservation temperature to be 1150-1350 ℃, preserving heat for 0.4-0.8 h when the height of the copper liquid level of a melting furnace (3) is consistent with that of the heat preservation furnace (12), then carrying out horizontal continuous casting production, and starting to pull a casting billet when the temperature of the copper liquid in a crystallizer assembly (11) reaches a casting temperature.
9. The method for quickly starting a horizontal continuous casting furnace according to claim 8, wherein in the step S3, the power of the first circular coil (501), the second circular coil (503), the third circular coil (504), the fourth circular coil (505) and the fifth circular coil (506) in the circular coil assembly (5) is set to 60-80 kW, 80-100 kW, 100-120 kW, 120-140 kW and 140-160 kW in sequence.
10. The method for quickly starting a horizontal continuous casting furnace according to claim 8, wherein in step S3, the power of the third disc-shaped coil (601), the fourth disc-shaped coil (603), the fifth disc-shaped coil (607) and the sixth disc-shaped coil (609) in the lower disc-shaped coil assembly (6) is set to 20-30 kW, 20-30 kW and 10-20 kW in sequence.
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| CN114309518A (en) * | 2021-11-22 | 2022-04-12 | 刘巍 | Intelligent control technology for online hot processing production line of metal liquid magnetic suspension continuous casting waste heat blank |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102489677A (en) * | 2011-12-26 | 2012-06-13 | 大连理工大学 | Block-type amorphous alloy plate continuous casting device and method thereof |
| CN203495173U (en) * | 2013-08-19 | 2014-03-26 | 江苏兴荣美乐铜业有限公司 | Large-diameter high-purity oxygen-free copper casting blank horizontal continuous casting conjoined furnace |
| CN204108253U (en) * | 2014-09-30 | 2015-01-21 | 江西中晟金属有限公司 | Horizontally continuous casting copper pipes processing unit (plant) |
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