Molten steel tank car and accident molten steel leading-out method

Abstract

A molten steel tank car comprises a car frame, a molten steel flow tank and a rotating rail, and is characterized in that the car frame is a rectangular car frame, wheels and driving devices are arranged at the bottoms of the four corners of the car frame so that the molten steel tank car (2) can walk on the rail of the molten steel tank car and the rotating rail of a rotating rail car (4), and the molten steel flow tank (3) is arranged on the side of the molten steel tank car. And an upper opening of the molten steel flow groove is communicated with the through hole of the molten steel containing disc, and a lower opening of the molten steel flow groove penetrates through the upper portion of the wheel and is connected with a molten steel collecting groove pit (7) formed in the outer side of the track. According to the molten steel tank car and the accident molten steel leading-out method, the whole-process seamless continuous containing, leading-out and collecting of accident molten steel in the advancing process of the molten steel tank car on a steel tank car transfer device and in the process of various states and stations such as different treatment stations are achieved, and the safe, reliable and efficient operation target is achieved; the comprehensive benefit is obvious; and the popularization value is high.

Description

Technical Field

[0001] The present invention belongs to the technical field of metallurgy, and specifically, it is a ladle car and a method for drawing out molten steel in case of an accident. Background Art

[0002] As important refining treatment containers and transportation tools in the smelting field, ladles and ladle cars play an important role in the smelting process. However, during the smelting or transportation process of the ladle car, due to reasons such as the erosion of the refractory lining, porous bricks, and tundishes inside it, molten steel leakage accidents may occur. At this time, if the leaked molten steel cannot be smoothly drained, collected, and led into the accident pit for collection in a timely and effective manner, the high-temperature molten steel will quickly burn out the equipment at the treatment station and for transportation; and it will trigger fires and explosion accidents, which may lead to major accidents such as production stoppage or casualties in severe cases.

[0003] The well-known technical solutions in the smelting field usually include traditional ladle cars with accident molten steel diversion troughs set in the traveling direction of the ladle car, and accident pits and the like are provided at specific positions such as treatment stations. They can only solve the problem of molten steel accident diversion and collection at specific positions, but the measures for receiving, drawing out, and collecting the accident molten steel of the ladle car when it is moving towards the rotary rail car, after driving onto the rotary rail car and during its rotation, and when it is rotated on the rotary rail car and then runs to the first treatment station or the second treatment station respectively are the "bottleneck problems" existing in traditional process equipment.

[0004] Therefore, in the prior art, how to manufacture a ladle car to solve the above bottleneck problem has become an urgent technical problem in this field. Summary of the Invention

[0005] The purpose of the present invention is to provide a ladle car and a method for drawing out molten steel in case of an accident that meet the process requirements of extreme efficiency, quality improvement, safety, and reliability.

[0006] To achieve the above purpose, the technical solution of the present invention is as follows: A ladle car, comprising a vehicle frame, a molten steel flow trough, and a rotary rail, characterized in that: The vehicle frame is a rectangular vehicle frame, and wheels are provided at the bottoms of the four corners of the vehicle frame so that the ladle car can travel on the track of the ladle car and the rotary track of the rotary rail car. A ladle seat for placing the ladle is provided on the upper surface of the middle part of the vehicle frame. A molten steel receiving tray is provided at the bottom and around the vehicle frame below the ladle seat for receiving molten steel in case of an accident, and through holes are provided at the bottom of the molten steel receiving tray; The molten steel flow trough is arranged beside the ladle car, the molten steel flow trough is obliquely arranged, the upper opening of the molten steel flow trough is communicated with the through holes of the molten steel receiving tray, and the lower opening of the molten steel flow trough passes through the upper part of the wheel and is connected to a molten steel collecting trough pit arranged outside the track.

[0007] The ladle car of the present invention can also be further realized by adopting the following technical measures.

[0008] For the aforementioned ladle car, refractory materials are laid on the accident molten steel receiving tray.

[0009] For the aforementioned ladle car, the side herein refers to the side of the ladle car in the forward direction.

[0010] For the aforementioned ladle car, the molten steel collecting trough pit is a strip-shaped accident molten steel collecting trough pit, and refractory materials are laid in the trough pit.

[0011] For the aforementioned ladle car, an annular receiving chute is provided below the rotary rail car.

[0012] An accident molten steel discharging method for a ladle car is characterized by including the following steps: a. When the ladle on the ladle car leaks molten steel on the straight track, the accident molten steel passes through the accident molten steel receiving tray arranged under and around the vehicle body of the ladle car seat of the ladle car, and the accident molten steel chute (3) arranged between the lower edge of the support beam on the side of the frame and the running track of the ladle car. The outlet end of the molten steel chute is higher than the rail surface of the running rail of the ladle car and extends outside the track; b. When the ladle on the ladle car leaks molten steel on the rotary rail car, the accident molten steel can also be introduced into the strip-shaped collecting trough pit preset outside the rail; c. When the ladle on the ladle car leaks molten steel after driving onto the rotary rail car or during the rotation process, the accident molten steel is led out from the side chute on the ladle car into the molten steel drainage cylinder (5) fixed on the rotary rail car. Subsequently, the accident molten steel is introduced from the drainage cylinder into the annular receiving chute preset in the concrete foundation below the rotary rail car, and finally converges into the strip-shaped collecting trough pit convenient for hoisting and handling through the collecting chute of the annular track; d. When the ladle on the ladle car leaks molten steel after the rotary rail and when walking to the first treatment station and the second treatment station, the accident molten steel is led out from the side chute on the ladle car into the first collecting trough pit or the second collecting trough pit respectively arranged between the tracks at the first treatment station or the second treatment station for convenient hoisting and handling.

[0013] The accident molten steel discharging method of the ladle car of the present invention can also be further realized by adopting the following technical measures.

[0014] For the aforementioned method, the molten steel chute is provided with a refractory lining.

[0015] For the aforementioned method, the outlet end of the molten steel chute is higher than the rail surface of the running rail of the ladle car by 100 - 200 mm and extends 300 - 500 mm outside the rail.

[0016] After adopting the above technical solution, the ladle car and the method for leading out molten steel in case of an accident of the present invention have the following advantages: 1. Realize seamless and continuous receiving, leading out and collecting of the molten steel in case of an accident during the whole process of the ladle car in motion, on the ladle car transfer device (such as in a complex rotating state), and at different treatment positions and other states and workstations; 2. Can synchronously achieve high-quality and high-efficiency process objectives, and is safe and reliable, with remarkable comprehensive benefits and high popularization value. Description of the Drawings

[0017] Figure 1 Schematic structural diagram of the ladle car according to the embodiment of the present invention; Figure 2 Schematic diagram of leading out the molten steel leaking in case of an accident when the ladle car according to the embodiment of the present invention is running on the track; Figure 3 Schematic plan and elevation views of the strip-shaped accident molten steel collecting tank pit and the annular receiving chute arranged in the rotating track car foundation pit and communicating with it according to the embodiment of the present invention; Figure 4 For Figure 3 A-A sectional view; Figure 5 Schematic elevation view of seamlessly and continuously introducing the molten steel in case of an accident into the strip-shaped accident molten steel collecting tank pit according to the embodiment of the present invention; Figure 6 Schematic plan view of the accident molten steel collecting tank pit between the tracks that can be directly accessed when the molten steel in case of an accident is respectively introduced into the first or second treatment workstations through the side chute when the unique ladle car runs to the first or second treatment workstation after being rotated by the rotating track car;

[0018] In the figure: 1 ladle, 2 ladle car, 3 molten steel chute, 4 rotating track car, 5 molten steel drainage cylinder, 6 leading-out chute, 7 strip-shaped accident molten steel collecting tank pit, 8 molten steel receiving tray, 9 first treatment workstation, 10 second treatment workstation, 11 first collecting tank pit, 12 second collecting tank pit, 13 driving device. Detailed Embodiment

[0019] The present invention will be further described below in conjunction with the embodiments and their accompanying drawings.

[0020] Embodiment 1 The ladle car of the present invention includes a vehicle frame, a molten steel chute, and a rotating track.

[0021] Now please refer to Figures 1 - 6 , Figure 1Schematic diagram of the structure of the molten steel ladle car according to the embodiment of the present invention. As shown in the figure, the vehicle frame is a rectangular vehicle frame provided with a driving device 13. Wheels and a driving device are provided at the bottoms of the four corners of the vehicle frame, so that the molten steel ladle car 2 can travel on the straight track of the molten steel ladle car and the rotating track of the rotating track car 4. A molten steel ladle seat for placing the molten steel ladle 1 is provided on the upper surface of the middle part of the vehicle frame. A molten steel receiving tray 8 is provided at the bottom and around the vehicle frame under the molten steel ladle seat for receiving molten steel in case of an accident. Through holes are provided at the bottom of the molten steel receiving tray; refractory materials are laid on the accident molten steel receiving tray.

[0022] The molten steel chute 3 is arranged beside the molten steel ladle car. The molten steel chute is arranged obliquely. The upper opening of the molten steel chute is communicated with the through hole of the molten steel receiving tray. The lower opening of the molten steel chute passes through the upper part of the wheel and is connected with a strip-shaped accident molten steel collecting trough pit 7 arranged outside the track through a lead-out chute 6. The side is the side of the molten steel ladle car in the forward direction. The molten steel collecting trough pit is a strip-shaped accident molten steel collecting trough pit, and refractory materials are laid in the trough pit. An annular receiving lead-out chute 6 is provided under the rotating track car.

[0023] Embodiment 2 The accident molten steel lead-out method of the molten steel ladle car of the present invention includes the following steps: a. If the molten steel ladle leaks molten steel on the straight track, the accident molten steel passes through the accident molten steel receiving tray arranged under and around the vehicle body of the molten steel ladle on the molten steel ladle car seat. The accident molten steel chute 3 is arranged between the lower edge of the supporting beam on the side of the vehicle frame and the running track of the molten steel ladle car. The outlet end of the accident molten steel outflow chute is 150 mm higher than the rail surface of the running rail of the molten steel ladle car and extends 400 mm outside the rail to ensure the smooth lead-out of the accident molten steel.

[0024] b. If the molten steel ladle leaks molten steel on the rotating track car, the accident molten steel can also be introduced into the strip-shaped accident molten steel collecting trough pit 7 preset outside the rail.

[0025] c. If the molten steel ladle leaks molten steel after the molten steel ladle car drives onto the rotating track car or during the rotation process, the accident molten steel can be led out from the side chute on the molten steel ladle car into the drainage cylinder (refractory materials are provided on the inner walls around) fixed on the rotating track car; then the accident molten steel is led from the drainage cylinder into the annular accident chute preset in the concrete foundation under the rotating track car (which can realize continuous collection of the accident molten steel during the rotation of the rotating track car); then the accident molten steel flows through the collection chute crossing the annular track and finally converges into the strip-shaped accident molten steel collecting trough pit convenient for hoisting and handling.

[0026] d. If the molten steel ladle car 2 is rotated on the dedicated rotating track of the rotating rail car 4 and then runs to the preset first processing station 9, in case of molten steel leakage from the ladle, the accidental molten steel can be led out through the lateral molten steel chute 3 on the ladle car and reach the first collection sump pit 11 located between the tracks. There is a slope in the accident pit, and the accidental molten steel can flow to the confluence of the molten steel collection pit. After the molten steel solidifies into an ingot, the ingot can be lifted out by the overhead crane in the workshop. When it runs to the preset second processing station 10, the setting and function of the second collection sump pit 12 are the same as those of the first collection sump pit 11, which will not be elaborated here.

[0027] The unique innovative design and remarkable technological progress of the present invention have been substantially verified in continuous large-scale production applications, enabling the double-station 150-ton RH of the three-steel ladle car rotating track to achieve an innovative breakthrough in high quality, high efficiency, and low cost, reaching the operation goals of extremely high efficiency, safety, and reliability, with remarkable comprehensive benefits. The above embodiments are only for illustrating the present invention and not for limiting it. Those skilled in the relevant technical fields can make various transformations or changes without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions should also belong to the scope of the present invention and should be defined by each claim.

Claims

1. A molten steel tank car, comprising a frame, a molten steel flow channel, and a rotating track, characterized in that: The frame is a rectangular frame, and wheels are provided at the bottom of the four corners of the frame so that the molten steel tank car (2) can travel on the track of the molten steel tank car and the rotating track of the rotating track car (4). A molten steel tank seat for placing the molten steel tank (1) is provided on the upper surface of the middle part of the frame. A molten steel receiving pan (8) is provided at the bottom and around the frame below the molten steel tank seat for receiving molten steel in the event of an accident, and a through hole is provided at the bottom of the molten steel receiving pan; The molten steel flow channel (3) is arranged beside the molten steel tank car, and is arranged obliquely. The upper opening of the molten steel flow channel is connected to the through hole of the molten steel receiving plate, and the lower opening of the molten steel flow channel passes through the upper part of the wheel and is connected to the molten steel collecting trough (7) arranged on the outer side of the track or the molten steel drainage tube (5) on the rotating track car (4).

2. The molten steel tank car according to claim 1, characterized in that: The accident molten steel receiving tray is paved with refractory materials.

3. The molten steel tank car according to claim 1, characterized in that: The side is the side of the molten steel tank car in the forward direction.

4. The molten steel tank car according to claim 1, characterized in that: The molten steel collecting pit is a strip-type accident molten steel collecting pit, and the pit is paved with refractory materials.

5. The molten steel tank car according to claim 1, characterized in that: An annular receiving flow trough (6) is provided below the rotating rail vehicle.

6. A method for drawing out molten steel from a molten steel tank car according to claim 1, characterized in that The following steps are involved: a. If a molten steel tank leaks when the molten steel tank car is on a straight track, the accident molten steel will flow through the molten steel tank car seat. The molten steel receiving tray is provided below and around the molten steel tank car body, and the accident molten steel flow channel (3) is provided between the lower edge of the lateral support beam of the frame and the molten steel tank car running track. The outlet end of the molten steel flow channel is higher than the rail surface of the steel tank car running track and extends out of the track; b. If a molten steel tank leaks from a molten steel tank on a rotating rail car, the accidental molten steel can also be introduced into a strip-shaped collecting trough (7) preset on the outer side of the rail; c. If the molten steel tank leaks after the molten steel tank car is driven onto the rotating rail car or during the rotation process, the accidental molten steel is led out from the lateral flow channel on the molten steel tank car to the molten steel drainage tube (5) fixed on the rotating rail car, and then the accidental molten steel is led from the drainage tube to the annular receiving flow channel (6) preset in the concrete foundation below the rotating rail car, and then finally converges to the strip collection trough (7) for convenient lifting and processing through the collection flow channel of the annular track; d. If the molten steel tanker leaks steel when the molten steel tanker moves to the first processing station (9) or the second processing station (10) after rotating the track, the accidental molten steel is led out through the lateral flow channel on the molten steel tanker to the first collecting trough pit (11) or the second collecting trough pit (12) respectively arranged between the tracks at the first processing station or the second processing station, so as to facilitate lifting and processing.

7. The method for drawing out molten steel in case of an accident from a molten steel tank car according to claim 6, characterized in that: The molten steel flow channel (3) is provided with a lining of refractory material.

8. The method for drawing out molten steel in case of an accident from a molten steel tank car according to claim 6, characterized in that: The outlet end of the molten steel flow channel (3) is 100-200 mm higher than the surface of the steel rail on which the steel tank car travels, and extends 300-500 mm beyond the outside of the steel rail.

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