Device for adding waste steel into hot-metal bottle

Abstract

The utility model discloses a device for adding scrap steel into a hot-metal ladle, which solves the problems of low scrap steel adding efficiency, inaccurate scrap steel amount control and dust pollution, and comprises a hot-metal ladle transport vehicle moving back and forth between a blast furnace ironmaking workshop and a converter steelmaking workshop, a scrap steel bin arranged in the converter steelmaking workshop, a dust removal mechanism and a hoisting transport mechanism, the hot-metal ladle transport vehicle comprises a transport vehicle body and a hot-metal ladle detachably arranged on the transport vehicle body. The scrap steel stock bin is used for receiving scrap steel, and the scrap steel stock bin is provided with a pressure sensor for weighing the scrap steel; the dust removal mechanism comprises a dust removal cover and a dust removal air pipe, the dust removal cover covers the periphery of a discharge port of the scrap steel bin, one end of the dust removal air pipe communicates into the dust removal cover, and the other end of the dust removal air pipe is connected with suction equipment; and the hoisting and transporting mechanism is used for taking, placing and transporting the hot-metal bottle. The steel scrap adding efficiency can be improved, the steel scrap adding amount can be accurately controlled, and dust pollution is reduced.

Description

Technical Field

[0001] The utility model relates to a device for adding scrap steel into a molten iron tank. Background Art

[0002] The blast furnace-converter process is a conventional process for smelting steel from iron ore. In the context of increasingly tight energy, the importance of effectively utilizing energy and reducing environmental pollution has become increasingly prominent. If more scrap steel can be used in the blast furnace-converter process, on the one hand, the utilization rate of scrap steel will be greatly improved, and on the other hand, a large amount of energy can be saved and the emission of harmful substances can be reduced. This is undoubtedly an important way to promote energy conservation and emission reduction in the steel industry. The current measures to increase the scrap steel ratio in steel mills include: adding scrap steel to the blast furnace, adding scrap steel during the iron-making process (blast furnace iron-making field), adding scrap steel to the molten iron tank and preheating, adding scrap steel to the scrap steel tank and preheating, adding scrap steel to the furnace and preheating, etc.; adding scrap steel to the molten iron tank is a simple and efficient way of adding, with low investment and high efficiency, and the heat of high-temperature molten iron can be fully used to melt the scrap steel.

[0003] At present, adding scrap steel into the molten iron tank is mostly done manually, which is not only labor-intensive but also has low production efficiency. In addition, some companies use grab cranes to directly grab scrap steel and add it to the molten iron tank, but it is difficult to control the weight of the scrap steel added, and a large amount of dust is generated during the addition of scrap steel, affecting the production environment. Therefore, it is urgent to design an efficient and environmentally friendly device for adding scrap steel into the molten iron tank. Utility Model Content

[0004] Therefore, in order to solve the above problems, the utility model provides a device for adding scrap steel to a molten iron tank.

[0005] To achieve the above purpose, the technical solution provided by the utility model is as follows:

[0006] A device for adding scrap steel to a molten iron tank, comprising a molten iron tank transport vehicle that travels back and forth between a blast furnace ironmaking workshop and a converter steelmaking workshop, a scrap steel silo, a dust removal mechanism, and a lifting and transport mechanism that are arranged in the converter steelmaking workshop;

[0007] The molten iron ladle transport vehicle comprises a transport vehicle and a molten iron ladle detachably arranged on the transport vehicle;

[0008] The scrap steel silo is used to receive scrap steel, and the scrap steel silo is equipped with a pressure sensor for weighing the scrap steel;

[0009] The dust removal mechanism includes a dust removal hood and a dust removal air duct, wherein the dust removal hood covers the side of the discharge port of the scrap steel bin, one end of the dust removal air duct is connected to the dust removal hood, and the other end is connected to the suction device;

[0010] The lifting and transporting mechanism is used for taking, placing and transporting the molten iron ladle.

[0011] Optionally, the scrap steel silo includes a hopper and a support frame, the support frame is arranged in a converter steelmaking workshop, the hopper is installed on the support frame, and a discharge valve is installed at an outlet end of the hopper.

[0012] Optionally, the top of the hopper is a quadrilateral structure, and its four edges are installed on a support frame. Four pressure sensors are correspondingly provided and installed between the hopper edge and the support frame and located in the middle of the hopper edge.

[0013] Optionally, the discharge port of the discharge valve is connected to a feeding chute having an inclined section.

[0014] Optionally, the dust hood is installed on a support frame, the dust hood has a hollow structure and is open on one side away from the scrap steel silo, and the discharge port of the feeding chute is penetrated into the dust hood.

[0015] Optionally, the dust removal air duct is installed with a dust removal valve for controlling the opening and closing of the dust removal air duct.

[0016] Optionally, a track is provided between the blast furnace ironmaking workshop and the converter steelmaking workshop, and the molten iron ladle transport vehicle is movably mounted on the track for the passage of the molten iron ladle transport vehicle.

[0017] Optionally, the track is provided in plurality and corresponds to the scrap steel silo in the converter steelmaking workshop.

[0018] Optionally, the lifting and transporting mechanism includes a charging span arranged in the converter steelmaking workshop and a crane arranged to move along the length direction of the charging span; the charging span spans all the tracks, and the crane is used to lift or lower the molten iron ladle.

[0019] Optionally, the transport vehicle is configured with front and rear dual drive.

[0020] The technical solution provided by the utility model has the following beneficial effects:

[0021] 1. By setting up hot metal ladle transport vehicles and scrap steel silos, the scrap steel in the converter steelmaking workshop can be efficiently unloaded into hot metal ladle. The hot metal ladle with scrap steel is transported to the blast furnace ironmaking workshop by the transport vehicle to receive the molten iron, and the scrap steel is melted by the high temperature of the molten iron. The hot metal ladle is lifted and transported to the converter for iron addition in sequence by the lifting and transportation mechanism, thereby improving the iron addition efficiency of the hot metal ladle. By setting up a dust removal mechanism, the unorganized dust generated during the process of adding scrap steel to the hot metal ladle can be greatly reduced, thus creating a better working environment for workshop operators and improving the air quality in the workshop.

[0022] 2. The hopper is equipped with a pressure sensor, which can accurately weigh the scrap steel in the hopper and accurately control the weight of the scrap steel added to the molten iron tank;

[0023] 3. The transport vehicle adopts a front and rear dual-drive structure. When one set of drive devices fails, the other set of drive devices can still drive the entire transport vehicle and the molten iron tank at a low speed to complete the transportation work, which is safe and reliable;

[0024] 4. The discharge port of the discharge valve is connected to the feeding chute, which can unload the force during the scrap steel discharging process and reduce the generation of dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is an overall schematic diagram of the present embodiment;

[0026] Figure 2 It is a schematic diagram of the molten iron ladle transport vehicle, the scrap steel silo, the dust removal mechanism and the scrap steel basket in this embodiment.

[0027] Explanation of the accompanying reference numerals: 1. Blast furnace ironmaking workshop; 2. Converter steelmaking workshop; 3. Hot metal ladle transport vehicle; 31. Transport vehicle; 32. Hot metal ladle; 4. Scrap steel silo; 41. Hopper; 42. Support frame; 43. Discharge valve; 44. Feeding chute; 5. Dust removal mechanism; 51. Dust removal hood; 52. Dust removal duct; 53. Dust removal valve; 6. Lifting and transport mechanism; 61. Feeding span; 62. Crane; 7. Track; 8. Scrap steel basket. DETAILED DESCRIPTION

[0028] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] The utility model is now further described in conjunction with the accompanying drawings and specific implementation methods.

[0030] A device for adding scrap steel to a molten iron tank comprises a molten iron tank transport vehicle 3 that travels back and forth between a blast furnace ironmaking workshop 1 and a converter steelmaking workshop 2, a scrap steel silo 4, a dust removal mechanism 5, and a lifting and transport mechanism 6 arranged in the converter steelmaking workshop 2. The entire device is controlled by an existing electric control system.

[0031] The molten iron tank transport vehicle 3 includes a transport vehicle 31 and a molten iron tank 32 detachably arranged on the transport vehicle 31. The molten iron tank 32 is used to receive the molten iron produced in the blast furnace ironmaking workshop 1 or to receive the scrap steel discharged from the scrap steel silo 4. The transport vehicle 31 carries the molten iron tank 32 and transports it back and forth between the blast furnace ironmaking workshop 1 and the converter steelmaking workshop 2. In order to facilitate the movement of the transport vehicle 31, the blast furnace ironmaking workshop 1 and the converter steelmaking workshop 2 are paved with tracks 7. Multiple groups of tracks 7 are laid in parallel. In this embodiment, two transport vehicles 31 are arranged on each group of tracks 7. The number of groups of tracks 7 corresponds to the number of scrap steel silos 4. In addition, the molten iron tank transport vehicle 3 adopts variable frequency speed regulation, and the molten iron tank transport vehicle 3 is driven by the motor through the reducer coupling to transmit torque to the wheels. The vehicle body power design adopts a dual-drive configuration. When one set of drive devices fails, the other set of drive devices can still complete a working cycle with a heavy bag at a low speed, which is safe and reliable.

[0032] The scrap steel silo 4 is used to receive the scrap steel produced in the converter steelmaking workshop 2. The scrap steel silo 4 includes a hopper 41 and a support frame 42, both of which are welded steel structures. The support frame 42 is installed in the converter steelmaking workshop 2. The top of the hopper 41 is a quadrilateral structure, and its edge is mounted on the support frame 42. The hopper 41 is equipped with four pressure sensors. Each pressure sensor is correspondingly installed between the edge of the hopper 41 and the edge of the support frame 42, and is located in the middle of the edge of the hopper 41, sensing the pressure value of the hopper 41, thereby calculating the weight of the scrap steel in the hopper 41 and accurately controlling the discharge amount each time. A discharge valve 43 is installed at the discharge port of the hopper 41, and a feeding chute 44 is connected to the outlet end of the discharge valve 43. The feeding chute 44 has an inclined section, which can unload and buffer the discharged scrap steel, thereby reducing the dust.

[0033] The dust removal mechanism 5 is connected and installed at the discharge port of the scrap steel silo 4 to suck and clean the dust. The dust removal mechanism 5 includes a dust removal hood 51 and a dust removal air duct 52. The dust removal hood 51 is suspended on the support frame 42 and is located below the discharge port of the hopper 41. The dust removal hood 51 is a shroud-type structure with a hollow interior, an open bottom, and a closed periphery. One end of the dust removal air duct 52 is connected to the side wall of the periphery of the dust removal hood 51 and is connected to the interior of the dust removal hood 51, and the other end is connected to an external suction device. The outlet end of the feeding chute 44 is passed from top to bottom to the inside of the dust removal hood 51. In this way, when the scrap steel silo 4 is unloaded, most of the raised dust will be sucked away by the dust removal mechanism 5, effectively protecting the production environment. In addition, a dust removal valve 53 is installed in the dust removal air duct 52, which can control the opening and closing of the dust removal air duct 52, effectively avoiding the backflow of dust.

[0034] The lifting and transporting mechanism 6 includes a charging span 61 and a crane 62. The charging span 61 is located in the converter steelmaking workshop 2 and spans all the tracks 7. The crane 62 is installed on the charging span 61 and moves along the length direction of the charging span 61. The crane 62 lifts or lowers the molten iron ladle 32 through a hook.

[0035] In this embodiment, a bottom-opening scrap steel basket 8 is provided. The bottom-opening scrap steel basket 8 is made of steel plate. The basket body is cylindrical and has lifting ears on both sides. The bottom is a movable bottom similar to a clam shell structure, which can be opened to both sides at the same time. The bottom-opening scrap steel basket 8 filled with scrap steel in advance is transported to the vicinity of the scrap steel bin 4, and the bottom-opening scrap steel basket 8 is lifted to the top of the scrap steel bin 4 by a crane, and the movable bottom is opened to unload the scrap steel into the scrap steel bin 4.

[0036] During operation, the molten iron tank transport vehicle 3 moves to the blast furnace ironmaking workshop 1. After the molten iron tank 32 receives the molten iron, it moves to the charging span 61. The crane 62 lifts the molten iron tank 32 filled with molten iron and transports it to the converter for iron addition. After the crane 62 has added iron to the two groups of molten iron tanks 32 on the same track 7 in turn, it puts the empty molten iron tank 32 on the transport vehicle 31. Then the transport vehicle 31 runs along the track 7 to the scrap steel bin 4, and at the same time opens the dust removal valve 53 on the dust removal air duct 52. Open the discharge valve 43 and discharge the scrap steel into the molten iron tank 32 in a quantitative manner. After the two molten iron tanks 32 on one track 7 have received the scrap steel, close the dust removal valve 53. The molten iron tank transport vehicle 3 moves to the blast furnace ironmaking workshop 1 to receive the molten iron, and uses the high temperature of the molten iron to melt the scrap steel in the molten iron tank 32.

[0037] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes may be made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A device for adding scrap steel to a molten iron tank, characterized in that: It includes a molten iron ladle transport vehicle that travels between the blast furnace ironmaking workshop and the converter steelmaking workshop, a scrap steel silo, a dust removal mechanism, and a lifting and transport mechanism installed in the converter steelmaking workshop; The molten iron ladle transport vehicle comprises a transport vehicle and a molten iron ladle detachably arranged on the transport vehicle; The scrap steel silo is used to receive scrap steel, and the scrap steel silo is equipped with a pressure sensor for weighing the scrap steel; The dust removal mechanism includes a dust removal hood and a dust removal air duct, wherein the dust removal hood covers the side of the discharge port of the scrap steel bin, one end of the dust removal air duct is connected to the dust removal hood, and the other end is connected to the suction device; The lifting and transporting mechanism is used for taking, placing and transporting the molten iron ladle.

2. The device for adding scrap steel to a molten iron tank according to claim 1, characterized in that: The scrap steel silo comprises a hopper and a support frame, wherein the support frame is arranged in a converter steelmaking workshop, the hopper is mounted on the support frame, and a discharge valve is installed at an outlet end of the hopper.

3. The device for adding scrap steel to a molten iron tank according to claim 2, characterized in that: The top of the hopper is a quadrilateral structure, and its four edges are installed on a support frame. Four pressure sensors are correspondingly arranged and installed between the hopper edge and the support frame and located in the middle of the hopper edge.

4. The device for adding scrap steel to a molten iron tank according to claim 2, characterized in that: The discharge port of the discharge valve is connected to a feeding chute with an inclined section.

5. The device for adding scrap steel to a molten iron tank according to claim 4, characterized in that: The dust removal hood is installed on the support frame. The dust removal hood has a hollow structure and is open on one side away from the scrap steel bin. The discharge port of the feeding chute is penetrated into the dust removal hood.

6. The device for adding scrap steel to a molten iron tank according to claim 1, characterized in that: The dust removal air duct is equipped with a dust removal valve for controlling the opening and closing of the dust removal air duct.

7. The device for adding scrap steel to a molten iron tank according to claim 1, characterized in that: A track is arranged between the blast furnace ironmaking workshop and the converter steelmaking workshop, and the molten iron ladle transport vehicle is movably mounted on the track for the passage of the molten iron ladle transport vehicle.

8. The device for adding scrap steel to a molten iron tank according to claim 7, characterized in that: The rails are provided in plurality and correspond to the scrap steel silos in the converter steelmaking workshop.

9. The device for adding scrap steel to a molten iron tank according to claim 8, characterized in that: The lifting and transporting mechanism comprises a charging span arranged in the converter steelmaking workshop and a crane arranged to move along the length direction of the charging span; the charging span spans across all the tracks, and the crane is used to lift or put down the molten iron ladle.

10. The device for adding scrap steel to a molten iron tank according to claim 1, characterized in that: The transport vehicle is configured with front and rear dual drive.

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