阅读说明：本技术 具有等离子加热的中间罐钢水低温恒温智能浇铸系统 (Tundish molten steel low-temperature constant-temperature intelligent casting system with plasma heating function ) 是由 王存 于 2020-04-24 设计创作，主要内容包括：本发明提供了一种具有等离子加热的中间罐钢水低温恒温智能浇铸系统,包括大包装置、中间罐装置和PLC主机,大包装置连接于中间罐装置,PLC主机分别连接于大包装置和中间罐装置；大包装置,用于将炼钢车间生产的钢水转移到中间罐装置；中间罐装置,用于接收大包装置浇铸的钢水,并将钢水输送入结晶器；PLC主机,通过采集大包装置和中间罐装置的现场模拟量数据以控制大包装置和中间罐装置的浇铸作业。所述浇铸系统实现了对中间罐内钢水的温度进行监控,从而实现钢水恒温低过热度匀拉速智能高效连铸作业生产,降低了浇铸过程中的生产成本并改善了钢的内部质量。(The invention provides a tundish molten steel low-temperature constant-temperature intelligent casting system with plasma heating, which comprises a ladle device, a tundish device and a P L C host, wherein the ladle device is connected with the tundish device, the P L C host is respectively connected with the ladle device and the tundish device, the ladle device is used for transferring molten steel produced in a steelmaking workshop to the tundish device, the tundish device is used for receiving the molten steel cast by the ladle device and conveying the molten steel into a crystallizer, and the P L C host is used for controlling the casting operation of the ladle device and the tundish device by collecting field analog quantity data of the ladle device and the tundish device.)

1. The low-temperature constant-temperature intelligent casting system for the molten steel in the tundish with the function of plasma heating is characterized by comprising a ladle device, a tundish device and a P L C host, wherein the ladle device is connected with the tundish device, and the P L C host is respectively connected with the ladle device and the tundish device;

the ladle device is used for transferring the molten steel produced in the steelmaking workshop to the tundish device;

the tundish device is used for receiving the molten steel cast by the ladle device and conveying the molten steel into the crystallizer;

and the P L C host controls the casting operation of the bale device and the intermediate tank device by collecting the field analog quantity data of the bale device and the intermediate tank device.

2. The intelligent tundish molten steel low-temperature constant-temperature casting system with plasma heating function according to claim 1, wherein the ladle device comprises a ladle body, a ladle turret for rotating the ladle body, a ladle weight sensor for measuring the weight of the ladle body and a ladle long nozzle for communicating with the tundish device, wherein the ladle weight sensor is connected to a P L C host to send weight information of the ladle body, the P L C host is connected to a driving mechanism of the ladle turret to control the rotation of the ladle body, the ladle turret is provided with a ladle rotation angle sensor, the rotation angle of the ladle body is transmitted to the P L C host in real time, and the ladle rotation angle value is displayed on an operator station in real time.

3. The intelligent low-temperature constant-temperature pouring system for the molten steel in the tundish, which is heated by the plasma, according to claim 1, is characterized in that the tundish device comprises a tundish body, a tundish liquid level meter used for measuring the liquid level of the molten steel in the tundish body, a tundish thermometer used for measuring the liquid temperature of the molten steel in the tundish body, a plasma electrode used for heating the molten steel in the tundish body and a tundish water gap used for conveying the molten steel in the tundish body, wherein the tundish liquid level meter, the tundish thermometer and the plasma electrode are all connected to a P L C host.

4. The intelligent tundish molten steel low-temperature constant-temperature casting system with the plasma heating function as claimed in claim 3, wherein a plasma electrode is vertically and movably arranged in the tundish body through a mechanical arm, the mechanical arm is connected with a lifting cabinet used for controlling a mechanical arm lifter to descend, and the lifting cabinet is connected with a P L C host.

5. The intelligent tundish molten steel low-temperature constant-temperature casting system with plasma heating function according to claim 3, wherein the plasma electrode is connected to a P L C host through a water-gas control box, the water-gas control box is provided with a water pipeline and a gas pipeline, the water pipeline is used for conveying circulating water to the plasma electrode to reduce the temperature of the plasma electrode, and the gas pipeline is used for conveying inert gas to the plasma electrode.

6. The intelligent tundish molten steel low-temperature constant-temperature casting system with the plasma heating function as claimed in claim 3, wherein the plasma electrode is connected to mains power supply through a short net, a reactor, a rectifier and a transformer in sequence, and the rectifier is connected to a P L C host.

7. The intelligent tundish molten steel low-temperature constant-temperature casting system with the plasma heating function according to claim 3, wherein the P L C host is connected with an operating platform, and a power supply start-stop button, an electrode operating button, an emergency stop button, an indicator lamp alarm buzzer, a computer for data recording and statistics filing and a human-computer interaction interface are arranged on the operating platform.

8. The intelligent tundish molten steel low-temperature constant-temperature casting system with plasma heating function according to claim 3, wherein the intelligent tundish molten steel low-temperature constant-temperature casting system comprises: the tundish body is internally provided with a retaining wall and a dam to reduce the ferrostatic pressure, and the tundish body is provided with an additive inlet for casting powder and a covering agent.

9. The intelligent tundish molten steel low-temperature constant-temperature casting system with the plasma heating function according to claim 5, wherein a water gap of the tundish is communicated with the crystallizer, and a water cooling system of the crystallizer is connected with a water-gas control cabinet of a P L C host machine.

10. The intelligent tundish molten steel low-temperature constant-temperature casting system with plasma heating function according to claim 9, wherein: the crystallizer comprises a water jacket, a copper pipe, a water gap and a supporting cushion block, wherein the copper pipe is fixed in the water jacket through the supporting cushion block, the space between the water jacket and the copper pipe is used as the water gap, a water cooling groove is further formed in the outer wall of the copper pipe, and a nickel-cobalt alloy layer and a chromium coating layer are arranged on the inner wall of the copper pipe.

Technical Field

The invention relates to the technical field of continuous casting production equipment, in particular to a tundish molten steel low-temperature constant-temperature intelligent casting system with plasma heating.

Background

By the last 80 s of the last century, metallurgical workers began to shift their work focus to the last vessel, the tundish, where liquid molten steel was changed into a solid cast slab, and the temperature problem was an important factor affecting the quality, cost and productivity of the steel solidification process, so that the technology of heating and controlling the temperature of molten steel in a continuous casting tundish began to be applied to production and achieved a good result, the tundish applied plasma heating technology could prevent the temperature of molten steel from dropping when changing ladles, the tundish plasma heating could quickly heat and compensate the molten steel in the tundish, control the temperature amplitude of the tundish, realize constant-speed casting, ensure the quality of cast slabs, reduce the defects and accidents that may be caused by the change of the pulling speed, generally, the temperature of molten steel was low at the last stage of casting and casting of each furnace in the production process of continuous casting machines, and the temperature of each furnace during continuous casting of multiple furnaces was different, and the temperature of molten steel in the tundish could not be controlled around the target temperature value without thermal compensation, but the casting temperature of the intermediate tank can be controlled within +/-2 ℃ of the target temperature by using the plasma heating of the intermediate tank, so that the aim of constant-speed casting is fulfilled; the tundish adopts the plasma heating technology, so that the tapping temperature can be reduced by about 15-40 ℃, the yield of molten steel is improved, and the unit yield of a continuous casting machine can be improved. In order to ensure a good quality cast slab, particularly to reduce center segregation and non-metallic inclusions, it is necessary to maintain the temperature of molten steel within an optimum casting temperature range.

At present, in a continuous casting production line which does not adopt a tundish heating measure, in order to avoid the occurrence of the accident of molten steel nodulation and remelting and stopping casting, a mode of greatly improving the superheat degree and improving the preceding tapping temperature is generally adopted to realize the continuous production operation of a continuous casting machine, and the result caused by the mode is that: the energy consumption is improved, the drawing speed is reduced, the quality of the billet is reduced, and the yield of the finished product is reduced.

Based on the technical problems in the prior art, the inventor provides the tundish molten steel low-temperature constant-temperature intelligent casting system with the plasma heating function by combining the experience of continuous casting for many years.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a tundish molten steel low-temperature constant-temperature intelligent casting system with plasma heating.

In order to realize the purpose of the invention, the following technical scheme is adopted:

a tundish molten steel low-temperature constant-temperature intelligent casting system with plasma heating function comprises a ladle device, a tundish device and a P L C host, wherein the ladle device is connected with the tundish device, and the P L C host is respectively connected with the ladle device and the tundish device;

the ladle device is used for transferring the molten steel produced in the steelmaking workshop to the tundish device;

the tundish device is used for receiving the molten steel cast by the ladle device and conveying the molten steel into the crystallizer;

and the P L C host controls the casting operation of the bale device and the intermediate tank device by collecting the field analog quantity data of the bale device and the intermediate tank device.

Further, the bale device comprises a bale body, a bale rotary table used for enabling the bale body to rotate, a bale weight sensor used for measuring the weight of the bale body and a bale long water gap used for being communicated with the intermediate tank device, wherein the bale weight sensor is connected to a P L C host computer to send weight information of the bale body, the P L C host computer is connected to a driving mechanism of the bale rotary table to control the rotation of the bale body, a bale rotary angle sensor is installed on the bale rotary table to transmit the rotary angle of the bale body to a P L C host computer in real time, and the bale rotary angle value is displayed on an operator station in real time.

Further, the tundish device includes the tundish body, be used for measuring this internal molten steel level's of tundish pans level gauge, be used for measuring this internal molten steel temperature's of tundish pans thermometer, be used for carrying out the plasma electrode that heats and be used for the tundish mouth of a river with this internal molten steel transport of tundish to the internal molten steel of tundish, wherein, tundish level gauge, tundish thermometer and plasma electrode all connect in P L C host computer.

Furthermore, a first continuous molten steel temperature measuring device for monitoring the temperature of molten steel poured into the tundish device from the ladle in real time is installed on the ladle long nozzle, a second continuous molten steel temperature measuring device for monitoring the temperature of molten steel poured into the crystallizer from the tundish device in real time is installed on the tundish nozzle, and the first continuous molten steel temperature measuring device and the second continuous molten steel temperature measuring device are both connected to a P L C host computer to send temperature measuring data.

Further, the plasma electrode can be arranged in the tundish body in a vertically moving mode through the mechanical arm, the mechanical arm is connected to a lifting cabinet used for controlling the mechanical arm lifting machine to descend, and the lifting cabinet is connected to the P L C host machine.

Further, the plasma electrode is connected to a P L C host through a water and gas control box, the water and gas control box is provided with a water pipeline and a gas pipeline, the water pipeline is used for conveying circulating water to the plasma electrode so as to reduce the temperature of the plasma electrode, and the gas pipeline is used for conveying inert gas to the plasma electrode.

Further, the plasma electrode is connected to mains power supply through a short network, a reactor, a rectifier and a transformer in this order, and the rectifier is connected to a P L C main unit.

Furthermore, the P L C host is connected with an operation console, and the operation console is provided with a power supply start-stop button, an electrode operation button, an emergency stop button, an indicator lamp alarm buzzer, a computer for data recording and statistics filing, and a human-computer interaction interface.

Furthermore, a retaining wall and a dam are arranged in the intermediate tank body to reduce the ferrostatic pressure, and an additive feeding port for feeding the covering slag and the covering agent is arranged on the intermediate tank body.

Furthermore, a water gap of the intermediate tank is communicated with the crystallizer, and a water cooling system of the crystallizer is connected with a water-air control cabinet of a P L C host machine.

Furthermore, the crystallizer comprises a water jacket, a copper pipe, a water gap and a supporting cushion block, wherein the copper pipe is fixed in the water jacket through the supporting cushion block, the space between the water jacket and the copper pipe is used as the water gap, a water cooling tank is further arranged on the outer wall of the copper pipe, and a nickel-cobalt alloy layer and a chromium coating layer are arranged on the inner wall of the copper pipe.

Compared with the prior art, the invention has the beneficial effects that:

according to the tundish molten steel low-temperature constant-temperature intelligent casting system with the plasma heating function, the heating start and stop of the tundish plasma heating system on the molten steel and the automatic adjustment of the heating power are controlled through the P L C host, the water flow of the water-cooling part of the crystallizer is controlled, the temperature amplitude of the molten steel in the tundish is greatly narrowed, the molten steel in the tundish is relatively stable on a time axis, the temperature of a steel blank in the crystallizer is kept relatively constant, the temperature of a finished steel product is always kept constant, the temperature of the molten steel in the tundish is monitored, the constant-temperature low-superheat-degree uniform-pulling-speed intelligent and efficient continuous casting operation production of the molten steel is achieved, the production cost in the casting process is reduced, and the internal quality of steel is improved.

Drawings

FIG. 1 is a schematic diagram of the composition of a tundish molten steel low-temperature constant-temperature intelligent casting system with plasma heating in the invention;

FIG. 2 is a schematic diagram of a P L C mainframe connected to a tundish means in the present invention;

FIG. 3 is a schematic view of the retaining wall and dam of the present invention;

FIG. 4 is a schematic view of the structure of the crystallizer of the present invention.

The reference numbers are as follows, 1-ladle device, 11-ladle body, 2-ladle weight sensor, 3-ladle turret, 4-ladle long nozzle, 5-tundish device, 51-tundish body, 511-retaining wall, 512-dam, 6-tundish liquid level meter, 7-tundish thermometer, 8-plasma electrode, 9-tundish nozzle, 10-crystallizer, 101-water jacket, 102-copper pipe, 103-water seam, 104-supporting cushion block, 105-nickel-cobalt alloy layer, 106-chromium coating, 107-water cooling tank, 13-transformer, 14-rectifier, 15-reactor, 16-short net, 17-operation platform, 18-P L C host, 19-water-gas control box, 20-lifting cabinet and 21-mechanical arm.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments, it being understood that the embodiments and features of the embodiments of the present application can be combined with each other without conflict.