CN114769523A - Tundish superconducting induction heating device - Google Patents
Tundish superconducting induction heating device Download PDFInfo
- Publication number
- CN114769523A CN114769523A CN202210294396.XA CN202210294396A CN114769523A CN 114769523 A CN114769523 A CN 114769523A CN 202210294396 A CN202210294396 A CN 202210294396A CN 114769523 A CN114769523 A CN 114769523A
- Authority
- CN
- China
- Prior art keywords
- air gap
- iron yoke
- superconducting
- tundish
- superconducting magnet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- 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
- B22D41/005—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like with heating or cooling means
- B22D41/01—Heating means
- B22D41/015—Heating means with external heating, i.e. the heat source not being a part of the ladle
-
- 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
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
- B22D2/006—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass for the temperature of the molten metal
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
The invention provides a tundish superconducting induction heating device which comprises a superconducting magnet system, an iron core, an iron yoke, an adjustable air gap iron yoke system, a through-flow guide pipe, a supporting rack, a water-cooling machine system and a remote operation platform. The strong static magnetic field generated by the superconducting magnet system is collected in the heating air gap space, the magnetic induction lines are cut through the flowing of the molten steel in the through-flow conduit, eddy current loss is generated, joule heat is generated, the molten steel is heated, and the heating air gap spaces with different sizes are formed by adjusting the adjustable air gap iron yoke system, so that the shape and size of the through-flow conduit can be changed, and meanwhile, the flow velocity of the molten steel is adjusted, and the overall heating effect on the molten steel is changed.
Description
Technical Field
The invention belongs to the field of metal heat treatment, and particularly relates to a tundish superconducting induction heating device which is used for a heat supplementing link for molten steel in a continuous casting steelmaking process.
Background
In the continuous casting process, the casting machine has high pulling speed, the funnel-shaped crystallizer has irregular shape, the requirement on the environment of the molten steel before the molten steel is solidified in the crystallizer is high, the requirement on the stability of superheat degree of the molten steel entering the crystallizer is high in order to obtain a product with uniform quality, in order to obtain a high-quality continuous casting billet, the molten steel is expected to be refined and temperature adjusted in a tundish continuously, the temperature of the molten steel is kept above or below the optimal superheat degree all the time, the smaller the fluctuation is, the better the fluctuation is, and the more important the heat supplementing process of the tundish is.
The temperature control of the tundish molten steel comprises the following three methods: 1) according to the maximum energy loss principle, tapping at the upper limit of tapping temperature → temperature regulation (such as scrap steel cooling) of a ladle station → a target temperature value of a tundish; 2) optimizing an energy loss principle, namely determining tapping temperature strictly according to temperature loss, and not cooling and heating at a ladle station to reach a temperature value required by a tundish target; 3) tapping according to the minimum energy loss principle, and supplementing a small amount of energy to a steel ladle or a tundish to reach a target temperature value. The method 1) is beneficial to the production organization, but the high tapping temperature causes the service life of the furnace and the ladle refractory material to be low, the consumption is increased, and the quality of steel is not good. The method 2) determines the tapping temperature according to the energy optimization principle in the steelmaking process, is an ideal state, and requires accurate control of the temperature drop of each procedure from tapping to pouring, which is difficult to realize due to the influence of various factors in the actual production. The method 3) provides external energy for the tundish, installs heating equipment, can prolong the service life of a furnace lining, can accurately control the temperature of molten steel in the tundish, ensures that the fluctuation range of the molten steel in the tundish is controlled within +/-5 ℃, obtains stable and proper molten steel in the tundish, and is favorable for realizing low-superheat-degree casting.
Various forms of tundish heating methods are currently developed, the most widely used being plasma heating and electromagnetic induction heating. The plasma heating method has the problems of difficult arc striking, large noise, low heating efficiency and the like, so the application effect is not satisfactory.
The tundish electromagnetic induction heating mode has the advantages of high heating speed, high electric heating efficiency and difficult contamination of molten steel; the electromagnetic stirring function can be achieved in the application process, the removal of impurities is facilitated, and the electromagnetic stirring device can be used for changing the flow rule of molten steel in the tundish to achieve a certain metallurgical effect; the process temperature is convenient to control, and the most important is that the superheat degree of the casting molten steel can be accurately controlled.
The casting temperature of the molten steel is an important technological parameter of continuous casting, and is the premise of smooth casting and the foundation for obtaining a good-quality casting blank, but the optimal superheat degree is obtained only by accurately controlling the temperature drop of the molten steel in the process from a steel ladle to a tundish, and a temperature compensation measure is required to be adopted. Among various tundish heating methods, electromagnetic induction heating is widely used with its remarkable advantage, and is the best temperature compensation measure. The current continuous casting machine has high drawing speed, the average drawing speed exceeds 4m/s, and the tundish induction heating technology is applied to continuous casting to adapt to the high-drawing-speed high-quality continuous casting effect. In conclusion, in the fierce market competition, only the quality can be used for winning, and the continuous casting machine needs to continuously perfect the process technology and improve the diversity and stability of the product by means of the unique advantages of the continuous casting machine, so that the sustainable development can be realized.
Disclosure of Invention
The invention aims to supplement heat of the tundish tap hole in the continuous casting and steelmaking process, thereby providing a tundish superconducting induction heating device, wherein the molten steel cuts magnetic induction lines in the flowing process, thereby generating joule heat to compensate the temperature.
In order to realize the purpose, the invention adopts the following technical scheme:
a tundish superconducting induction heating device comprises a superconducting magnet system, an iron yoke system, an adjustable air gap iron yoke system, a through-flow conduit, a supporting rack, a water cooling machine system, a remote operation platform and a heating air gap space;
the superconducting magnet system comprises a superconducting magnet coil, a low-temperature container, a vacuum container and a superconducting switch; the superconducting magnet coil is placed in a low-temperature container, the low-temperature container is fixed in a vacuum container through a pull rod, a required low-temperature environment is provided for the superconducting magnet coil through a refrigerator, and meanwhile, the low-temperature container is connected with the vacuum container and sealed;
a heating air gap space is formed between the outer adjustable air gap iron yoke system and the through-flow conduit;
the iron yoke system comprises an end iron yoke and an iron core structure, the iron core structure is positioned in a room temperature hole of the superconducting magnet system, and the iron yoke system is placed at two end positions of the room temperature hole and is used for transmitting a strong static magnetic field generated by the superconducting magnet system to a heating air gap space;
the adjustable air gap iron yoke system is connected with the iron yoke system, and the size of the heating air gap space can be adjusted by adjusting the position of the iron yoke of the adjustable air gap iron yoke system, so that the adjustable air gap iron yoke system is suitable for through-flow conduits with different diameters;
the supporting rack is positioned below the superconducting magnet system and the iron yoke system and is used for isolating the whole tundish superconducting induction heating device from the ground, so that the service life of the tundish superconducting induction heating device is prolonged;
the inside of the iron yoke system and the adjustable air gap iron yoke system is provided with a water cooling pipeline made of nonmagnetic materials, and when the superconducting magnet system works, the water cooling system reduces the high temperature generated on the iron yoke system and the adjustable air gap iron yoke system through the circulation of cooling water in the water cooling pipeline, so that the iron yoke system is protected;
the remote operation platform is used for monitoring the flowing condition of the molten steel in the through-flow guide pipe and the heating effect of the molten steel, and ensures that the molten steel has temperature compensation after flowing through the through-flow guide pipe.
Furthermore, the superconducting magnet coil is formed by winding a low-temperature superconducting material or a high-temperature superconducting material.
Further, when the superconducting magnet system operates, the vacuum container is vacuumized, and a low-temperature environment required by the operation of the superconducting magnet coil is provided through the refrigerator; and then the superconducting magnet coil is electrified and excited, and when the target current value is reached, the superconducting switch is closed, so that the superconducting magnet system operates in a closed loop without external power supply.
Furthermore, the iron yoke system and the adjustable air gap iron yoke system are made of DT4c electrical pure iron materials.
Further, a strong static magnetic field generated after the superconducting magnet coil is excited is transmitted to the heating air gap space through the iron yoke system and the adjustable air gap iron yoke system, and the magnetic induction line forms a closed loop through an iron core structure of the iron yoke system, an end iron yoke and the adjustable air gap iron yoke system.
Furthermore, the through-flow guide pipe is arranged in the middle of the heating air gap, is connected with the tundish and the crystallizer and is used for inputting the molten steel of the tundish into the crystallizer, and cutting the magnetic induction lines in the space of the heating air gap through the flowing of the molten steel in the through-flow guide pipe to generate eddy current loss and further generate joule heat, so that the molten steel is supplemented with heat.
Furthermore, the remote operation platform consists of a temperature sensor monitor, a displacement sensor monitor, a superconducting magnet excitation power supply and an upper computer, and is used for respectively monitoring the temperature changes of the molten steel and the superconducting magnet system, controlling the position of an iron yoke of the adjustable air gap iron yoke system and carrying out one-key excitation on the superconducting magnet system, and giving an alarm prompt when a fault occurs.
Furthermore, the adjustable air gap iron yoke system is composed of a plurality of rectangular iron yokes, is regulated and controlled by a control system of a remote operation platform, and realizes the adjustment of the size of the air gap of the heating air gap space by controlling the position and the distance of the independent iron yoke.
Further, the superconducting magnet coil adopts a solenoid-shaped magnet, a saddle-shaped coil or a runway-shaped coil.
Has the advantages that:
the invention aims to compensate the temperature of molten steel flowing into a crystallizer from a tundish in the continuous casting and steelmaking process, and the common heat compensation measures comprise plasma heating and electromagnetic induction heating, so that the plasma heating has more problems in heating mode and is difficult to strike; arc quenching is easy; the noise is large when the device is used, so that people cannot bear the device easily; electromagnetic radiation generated by the plasma has relatively large interference on a weak current system; the heating efficiency is low, and the actual use effect is poor; the superconducting electromagnetic induction heating mode has the advantages of high heating speed, high electric heating efficiency, electric energy consumption saving and difficult contamination of molten steel; certain types also have certain electromagnetic stirring effect, which is beneficial to removing the impurities and is convenient for controlling the process temperature.
Drawings
FIG. 1 is a schematic view showing the construction of a tundish superconducting induction heating apparatus of the present invention;
in the figure: 1 superconducting magnet system, 2 iron yoke system, 3 adjustable air gap iron yoke system, 4 through-flow conduit, 5 support rack, 6 water cooling machine system, 7 remote operation platform, 8 heating air gap space;
FIG. 2 is a schematic view of an adjustable air gap yoke system of the present invention;
FIG. 3 is a schematic view of the heating gap space of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
As shown in fig. 1, the tundish superconducting induction heating apparatus of the present invention comprises a superconducting magnet system 1, an iron yoke system 2, an adjustable air gap iron yoke system 3, a through-flow conduit 4, a support stand 5, a water cooler system 6, a remote operation platform 7 and a heating air gap space 8. The superconducting magnet system 1 and the iron yoke system 2 are placed on a support rack 5. The outer adjustable air gap yoke system 3 and the through-flow duct 4 form a heating air gap space 8, the through-flow duct 4 being located in the middle of the heating air gap space 8. The adjustable air gap iron yoke system 3 is composed of a plurality of rectangular iron yokes, and the position and the distance of each iron yoke can be controlled by regulating and controlling a control system of the remote operation platform 7, so that the air gap size of the heating air gap space 8 can be adjusted. The water cooling machine system 6 is positioned at the rear side of the superconducting magnet system 1, a through-flow conduit 4 is placed in a heating air gap space 8, and the configuration of the superconducting magnet system 1 is allocated by a remote operation platform 7.
The superconducting magnet system 1 comprises superconducting magnet coils, a low-temperature container, a vacuum container and a superconducting switch; the superconducting magnet coil can adopt a solenoid-shaped magnet, a saddle-shaped coil or a runway-type coil, and is placed in the low-temperature container. The low-temperature container is fixed in the vacuum container through a pull rod, a required low-temperature environment is provided for the superconducting magnet coil through the refrigerator, and meanwhile, the low-temperature container is connected with the vacuum container and sealed. The superconducting magnet coil can be formed by winding a low-temperature superconducting material or a high-temperature superconducting material. When the superconducting magnet system 1 is operated, the vacuum container needs to be vacuumized first, and a low-temperature environment required by the operation of the superconducting magnet coil is provided through the refrigerator; then the superconducting magnet coil is electrified and excited, and when the target current value is reached, the superconducting switch is closed, so that the superconducting magnet system operates in a closed loop without external power supply. After the superconducting magnet system 1 normally operates, a strong static magnetic field is generated in the heating air gap space 8, a tundish flow port is opened, molten steel flows through the through-flow conduit 4, the magnetic induction lines are cut, and joule heat is generated to supplement heat for the molten steel.
The iron yoke system 2 comprises an end iron yoke and an iron core structure, and the magnetic induction line forms a closed loop through the iron core structure, the end iron yoke and an iron yoke of the adjustable air gap iron yoke system 3. The iron core structure is positioned in a room temperature hole of the superconducting magnet system 1, the iron yoke systems 2 are placed at two end positions of the room temperature hole of the superconducting magnet system 1 and used for transmitting a strong static magnetic field generated by the superconducting magnet system 1 to the heating air gap space 8, the adjustable air gap iron yoke system 3 is connected with the iron yoke systems 2, and the size of the heating air gap space 8 can be adjusted by adjusting the positions of the iron yokes of the adjustable air gap iron yoke system 3, so that the adjustable air gap iron yoke system can adapt to through-flow guide pipes 4 with different diameters. The iron yoke system 2 and the adjustable air gap iron yoke system 3 comprise water cooling pipelines which are made of non-magnetic materials and are connected with a water cooling machine system 6. The water cooling machine system 6 is arranged near the tundish superconducting induction heating device, and cooling water flows through the water cooling machine system 6 and is used for cooling the superconducting magnet system 1, the iron yoke system 2 and the adjustable air gap iron yoke system 3. The iron yoke system 2 and the adjustable air gap iron yoke system 3 are made of DT4c electrical pure iron materials. The strong static magnetic field generated after the superconducting magnet coil is excited can be transferred to the heating air gap space 8 through the iron yoke system 2 and the adjustable air gap iron yoke 3.
The adjustable air gap iron yoke system 3 is regulated and controlled through the remote operation platform 7, the air gap space 8 can be heated according to actual temperature rising requirements, the position and the distance of an iron yoke of the adjustable air gap iron yoke system 3 are controlled, and the temperature rising of the molten steel is regulated in a heat supplementing mode.
The through-flow conduit 4 is arranged in the heating air gap space 8, the through-flow conduit 4 is connected with the tundish and the crystallizer and used for inputting molten steel in the tundish into the crystallizer, the molten steel flows in the through-flow conduit 4 to cut magnetic induction lines in the heating air gap space 8, eddy current loss is generated, and then joule heat is generated, so that the molten steel is supplemented with heat. The flow-through duct 4 consists of a refractory metal oxide ceramic.
The support rack 5 is located below the superconducting magnet system 1 and the iron yoke system 2 and used for isolating the whole superconducting magnet system from the ground, so that the service life of the tundish superconducting induction heating device can be prolonged.
The water-cooled machine system 6 is used for cooling the refrigerator, the iron yoke system 2 and the adjustable air gap iron yoke system 3 in the superconducting magnet system 1. The yoke system 2 comprises a nonmagnetic water cooling pipeline for protecting the yoke system 2 and avoiding damage caused by close approach of high-temperature molten steel. And water cooling pipelines made of nonmagnetic materials are arranged in the iron yoke system 2 and the adjustable air gap iron yoke system 3, and when the superconducting magnet system 1 works, the water cooling machine system 6 reduces the high temperature generated on the iron yoke system 2 and the adjustable air gap iron yoke system 3 through the circulation of cooling water in the water cooling pipelines, so that the iron yoke system 2 and the adjustable air gap iron yoke 3 are well protected.
The remote operation platform 7 is used for monitoring the flowing condition of the molten steel in the through-flow guide pipe 4 and the heating effect of the molten steel, and ensures that the molten steel can have better temperature compensation after flowing through the through-flow guide pipe 4. The remote operation platform 7 consists of a temperature sensor monitor, a displacement sensor monitor, a superconducting magnet excitation power supply and an upper computer, and is used for respectively monitoring the temperature change of the molten steel and the superconducting magnet system 1, controlling the iron yoke position of the adjustable air gap iron yoke system 3 and carrying out one-key excitation on a superconducting magnet coil and giving an alarm prompt when a fault occurs.
It will be understood by those skilled in the art that the foregoing is only an exemplary embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, since various modifications, substitutions and improvements within the spirit and scope of the invention are possible and within the scope of the appended claims.
Claims (9)
1. A tundish superconducting induction heating device is characterized in that:
the tundish superconducting induction heating device comprises a superconducting magnet system, an iron yoke system, an adjustable air gap iron yoke system, a through-flow conduit, a supporting rack, a water-cooling machine system, a remote operation platform and a heating air gap space;
the superconducting magnet system comprises a superconducting magnet coil, a low-temperature container, a vacuum container and a superconducting switch; the superconducting magnet coil is placed in a low-temperature container, the low-temperature container is fixed in a vacuum container through a pull rod, a required low-temperature environment is provided for the superconducting magnet coil through a refrigerator, and meanwhile, the low-temperature container is connected with the vacuum container and sealed;
a heating air gap space is formed between the outer adjustable air gap iron yoke system and the through-flow conduit;
the iron yoke system comprises an end iron yoke and an iron core structure, the iron core structure is positioned in a room temperature hole of the superconducting magnet system, and the iron yoke system is placed at two end positions of the room temperature hole and is used for transmitting a strong static magnetic field generated by the superconducting magnet system to a heating air gap space;
the adjustable air gap yoke system is connected with the yoke system, and the size of the heating air gap space is adjusted by adjusting the yoke position of the adjustable air gap yoke system, so that the adjustable air gap yoke system is suitable for through-flow conduits with different diameters;
the supporting rack is positioned below the superconducting magnet system and the iron yoke system and is used for isolating the whole tundish superconducting induction heating device from the ground, so that the service life of the tundish superconducting induction heating device is prolonged;
the inside of the iron yoke system and the adjustable air gap iron yoke system is provided with a water cooling pipeline made of nonmagnetic materials, when the superconducting magnet system works, the water cooling system reduces the high temperature generated on the iron yoke system and the adjustable air gap iron yoke system through the circulation of cooling water in the water cooling pipeline, so that the iron yoke system and the adjustable air gap iron yoke system are protected;
the remote operation platform is used for monitoring the flowing condition of the molten steel in the through-flow guide pipe and the heating effect of the molten steel, and ensures that the molten steel has temperature compensation after flowing through the through-flow guide pipe.
2. A tundish superconducting induction heating apparatus according to claim 1, wherein:
the superconducting magnet coil is formed by winding a low-temperature superconducting material or a high-temperature superconducting material.
3. A tundish superconducting induction heating apparatus according to claim 1, wherein:
when the superconducting magnet system operates, the vacuum container is vacuumized, and a low-temperature environment required by the operation of the superconducting magnet coil is provided through the refrigerator; and then the superconducting magnet coil is electrified and excited, and when the target current value is reached, the superconducting switch is closed, so that the superconducting magnet system operates in a closed loop without external power supply.
4. A tundish superconducting induction heating apparatus according to claim 1, wherein:
the iron yoke system and the adjustable air gap iron yoke system are made of DT4c electrical pure iron materials.
5. A tundish superconducting induction heating apparatus according to claim 1, wherein:
the strong static magnetic field generated after the superconducting magnet coil is excited is transmitted to a heating air gap space through an iron yoke system and an adjustable air gap iron yoke system, and the magnetic induction line forms a closed loop through an iron core structure of the iron yoke system, an end iron yoke and the adjustable air gap iron yoke system.
6. A tundish superconducting induction heating apparatus according to claim 1, wherein:
the through flow guide pipe is arranged in the middle of the heating air gap space, is connected with the tundish and the crystallizer and is used for inputting the molten steel in the tundish into the crystallizer, and cutting magnetic induction lines in the heating air gap space to generate eddy current loss and further generate joule heat through the flowing of the molten steel in the through flow guide pipe, so that the molten steel is supplemented with heat.
7. A tundish superconducting induction heating apparatus according to claim 1, wherein:
the remote operation platform consists of a temperature sensor monitor, a displacement sensor monitor, a superconducting magnet excitation power supply and an upper computer, and is used for respectively monitoring the temperature change of the molten steel and the superconducting magnet system, controlling the position of an iron yoke of the adjustable air gap iron yoke system, carrying out one-key excitation on the superconducting magnet system and carrying out alarm prompt when a fault occurs.
8. A tundish superconducting induction heating apparatus according to claim 1, wherein:
the adjustable air gap iron yoke system is composed of a plurality of rectangular iron yokes, is regulated and controlled by a control system of a remote operation platform, and realizes the adjustment of the size of the air gap in the heating air gap space by controlling the position and the distance of the single iron yoke.
9. A tundish superconducting induction heating apparatus according to claim 1, wherein: the superconducting magnet coil adopts a solenoid-shaped magnet, a saddle-shaped coil or a runway-shaped coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210294396.XA CN114769523A (en) | 2022-03-24 | 2022-03-24 | Tundish superconducting induction heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210294396.XA CN114769523A (en) | 2022-03-24 | 2022-03-24 | Tundish superconducting induction heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114769523A true CN114769523A (en) | 2022-07-22 |
Family
ID=82425873
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210294396.XA Pending CN114769523A (en) | 2022-03-24 | 2022-03-24 | Tundish superconducting induction heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114769523A (en) |
-
2022
- 2022-03-24 CN CN202210294396.XA patent/CN114769523A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203610629U (en) | Gas-protected crystallizer for horizontal continuous casting of copper tubes | |
| CN106001528B (en) | Continuous casting tundish direct-current plasma heating device using a plurality of graphite hollow bars as electrodes | |
| CN202316942U (en) | On-line heating device for continuously-cast large round blank | |
| CN202052920U (en) | Electromagnetic induction heating apparatus for large capacity tundish molten steel | |
| CN103212675B (en) | Steel ingot feeder head induction heating and electromagnetic stirring device | |
| CN103480832B (en) | Tundish induction heating device | |
| CN103567425A (en) | High-efficiency electromagnetic induction heating device for molten steel in tundish | |
| CN102191542B (en) | Equipment and method for preparing high-purity directionally crystallized polysilicon | |
| CN205119794U (en) | Vacuum medium frequency induction fur nace is used in metal melting | |
| CN109207675B (en) | A kind of channel-type induction heating single tube RH purifier and method | |
| TANG et al. | Progress and perspective of functioned continuous casting tundish through heating and temperature control | |
| CN114769523A (en) | Tundish superconducting induction heating device | |
| CN208282610U (en) | Suspension smelting furnace | |
| CN203610633U (en) | Cored crystallization system for up-drawing continuous casting of copper tubes and copper alloy tubes | |
| CN213052723U (en) | Channel type electromagnetic induction heating device for molten iron tundish | |
| CN102313447A (en) | Medium-frequency induction heating furnace for smelting nonmetallic high-melting-point oxide | |
| CN101121193B (en) | Low temperature continuous casting heat patching method and its automatic heat patching device | |
| CN114653912B (en) | Production method of large-diameter high-purity compact special steel continuous casting round billet | |
| Wang et al. | Development and application of a multi-graphite electrode DC plasma tundish heating | |
| CN203508952U (en) | Multi-roller stirring device for preparing semi-solid alloy sizing agent | |
| CN109954871A (en) | A kind of submersed nozzle heating rotating device and its working method | |
| CN110423862A (en) | A kind of double hose electromagnetic agitation RH device and method | |
| CN102350488A (en) | Online heating device for continuous casting round bloom | |
| CN114918387A (en) | Device and method for preparing ultra-high temperature alloy bar with low cost and short process | |
| CN110343812B (en) | Method for deeply removing inclusions in steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |