Scrap steel preheating and feeding device of ladle refining furnace

Abstract

The utility model discloses a steel scrap preheating and feeding device of a ladle refining furnace, which comprises a storage bin and a preheating bin, a discharge port at the bottom of the storage bin is connected with an elevator, a metering component is arranged below an outlet of the elevator and comprises a support frame, a rotating shaft is rotatably connected onto the support frame, and the rotating shaft is connected with the preheating bin. According to the scrap steel preheating and feeding device of the ladle refining furnace, scrap steel is lifted to the position above the metering assembly from the storage bin through the lifting machine and falls into the tray, the tray gradually descends along with increase of the scrap steel until the tray reaches a balance state, when the weight of the scrap steel on the tray reaches a preset value, the balance rod inclines, and the scrap steel on the tray is fed into the storage bin. According to the steel scrap metering device, the discharging sliding plate is triggered to be opened, steel scraps slide into the material receiving bin, the steel scraps are heated to the needed temperature in the preheating bin, metering is achieved through the ingenious design of the balance rod and the weights and a mechanical structure, the equipment cost is reduced, accurate metering of the steel scraps is achieved, and errors in a traditional method are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the steel ladle refining furnace's scrap steel preheating feeding technical field, concretely is a kind of steel ladle refining furnace's scrap steel preheating feeding device. BACKGROUND

[0002] Steel ladle refining furnace is the most widely used refining equipment at present, used to refine molten steel of converter, electric arc furnace and other primary refining furnace, with adjusting molten steel temperature, process buffer, deoxidation, desulfurization, decarburization, degassing, heating, alloy composition fine adjustment, argon stirring, rapid temperature measurement sampling, impurity removal, vacuum degassing, feeding wire adjustment composition and other functions, can make the whole steelmaking process reasonable matching, improve production continuity and improve molten steel quality, scrap steel is a kind of recyclable resource, adding scrap steel in steel ladle refining furnace is a simple and efficient utilization mode, which can adjust molten steel temperature and realize the reuse of scrap steel, improve resource utilization and economic benefit of steel plant.

[0003] Traditional steel ladle refining furnace adds scrap steel mostly using manual feeding mode, and the labor intensity of workers is large, and the working efficiency is low, and in addition, the refining furnace temperature is relatively high, and the risk is relatively high when adding, and it is easy to be scalded. At present, some enterprises will use mechanical adding mode to add scrap steel, but there are often the following problems: first, most of the added scrap steel is in normal temperature state, and the added amount is very limited, otherwise it will cause the molten steel temperature in the furnace to be excessively reduced, affecting the refining process. Second, when using electromagnetic chuck or grab bucket to add, an additional crane needs to be added to operate the electromagnetic chuck or grab bucket, and the operation is complex, the use cost is high, and the adding efficiency is low. Third, the adding amount of scrap steel cannot be accurately controlled in real time, and cannot meet the requirement of the adding amount of scrap steel of the refining furnace. Therefore, it is an objective need to develop a steel ladle refining furnace scrap steel preheating feeding device which is simple to operate, high in working efficiency and can accurately control the adding amount. UTILITY MODEL CONTENTS

[0004] To solve the problems in the background art, the utility model aims to provide a steel ladle refining furnace scrap steel preheating feeding device. Scrap steel is lifted from the storage bin to above the metering assembly by the elevator and falls into the tray. As the amount of scrap steel increases, the tray gradually descends until it reaches an equilibrium state. When the weight of the scrap steel on the tray reaches the preset value, the balance bar tilts, triggering the feeding slide to open, and the scrap steel slides into the receiving bin. The scrap steel is heated to the desired temperature in the preheating bin. The clever design of the balance bar and the weight allows for accurate metering using a mechanical structure, reducing equipment costs and eliminating errors associated with traditional methods.

[0005] The utility model can achieve the purpose by the following technical solutions:

[0006] A scrap steel preheating and feeding device for a ladle refining furnace includes a storage silo and a preheating silo. A hoist is connected to the discharge port at the bottom of the storage silo. The storage silo stores scrap steel to be preheated, and its discharge port is connected to the hoist. The hoist lifts the scrap steel from the storage silo to a certain height to prepare for subsequent metering and preheating. A metering component is installed below the outlet of the hoist. The metering component includes a support frame, a rotating shaft rotatably connected to the support frame, and a balance bar rotatably connected to the rotating shaft. A weight is detachably mounted on one end of the balance bar, and a tray is fixedly connected to the other end. A discharge slide plate is installed on the side of the tray away from the weight, and the discharge slide plate communicates with the tray. By adjusting the weight of the weight, the metering standard for the scrap steel can be set. When the scrap steel on the tray reaches the predetermined weight, the balance bar tilts, triggering the discharge slide plate to open, and the scrap steel slides into the receiving silo.

[0007] Furthermore, the support frame is equipped with a limiting rod. When the tray is unloaded, the tray is in contact with the limiting rod, and the height of the tray is higher than the height of the weight.

[0008] Furthermore, a receiving hopper is connected to one side of the preheating chamber, and a discharge hopper is connected to the other side. The receiving hopper is located below the discharge slide plate. A flue gas inlet is provided on one side of the discharge hopper, and an electric door is provided at the bottom of the discharge hopper. An infrared temperature sensor is installed inside the discharge hopper. The electric door, located at the bottom of the discharge hopper, is used to control the timing and amount of scrap steel discharge. The electric door at the bottom of the discharge hopper is used to monitor in real time whether the heated scrap steel meets the standards.

[0009] Furthermore, an auger is installed inside the receiving hopper, and a rotary motor is fixedly installed outside the receiving hopper. The output end of the rotary motor is connected to the auger for transmission, and one end of the auger passes through the preheating hopper and extends into the interior of the discharge hopper.

[0010] Furthermore, the discharge hopper and the preheating hopper are rotatably connected, and a transmission gear is fixedly connected to the side of the discharge hopper near the preheating hopper, and the transmission gear is coaxial with the preheating hopper.

[0011] Furthermore, a drive motor is installed on the preheating chamber, and a drive gear is fixedly connected to the output end of the drive motor. The drive gear meshes with a transmission gear. The discharge chamber and the heating chamber are rotatably connected through the transmission gear and the drive gear. The drive motor drives the discharge chamber to rotate through the drive gear, facilitating the adjustment of the discharge direction. Simultaneously, if the infrared temperature sensor detects that the temperature does not meet the standard, the discharge chamber is flipped, and then the auger is reversed to reheat the scrap steel, ensuring the success rate of preheating all scrap steel.

[0012] The beneficial effects of this utility model are:

[0013] 1. The utility model discloses a waste steel is lifted to the metering assembly above from the storage bin through the elevator, and falls into the tray. With the increase of waste steel, the tray gradually drops until the balance state is reached, when the weight of waste steel on the tray reaches the preset value, the balance bar is inclined, and the discharge slide plate is opened, and the waste steel slides into the receiving bin, and the waste steel is heated to the required temperature in the preheating bin. Through the ingenious design of the balance bar and the weight, the metering is realized by adopting the mechanical structure, the equipment cost is reduced, the accurate metering of waste steel is realized, and the error in the traditional method is avoided.

[0014] 2. When the infrared temperature measurement sensor detects that the temperature does not meet the standard, the discharge bin is turned over, then the auger is reversed to heat the waste steel again, and the success rate of preheating all waste steel is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model will be further described below in combination with the drawings.

[0016] Figure 1 It is the whole structure schematic diagram of the utility model;

[0017] Figure 2 It is the metering assembly structure schematic diagram in the utility model;

[0018] Figure 3 It is the structure schematic diagram in the preheating bin in the utility model;

[0019] Figure 4 It is the preheating bin structure sectional view in the utility model.

[0020] In the drawing:

[0021] 1, storage bin, 2, preheating bin, 3, elevator, 4, support frame, 5, rotating shaft, 6, balance bar, 7, weight, 8, tray, 9, discharge slide plate, 10, limit rod, 11, receiving bin, 12, discharge bin, 13, flue gas inlet, 14, electric door, 15, auger, 16, rotary motor, 17, transmission gear, 18, drive motor, 19, drive gear. DETAILED DESCRIPTION

[0022] The technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] In the description of the utility model, need understanding is, the term "open hole", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" indicate the orientation or positional relation, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the component or element must have a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0024] As Figures 1-4 The utility model provides a steel ladle refining furnace's scrap steel preheating feeding device, including storage bin 1 and preheating bin 2, the discharge port of storage bin 1 bottom is connected with elevator 3, and storage bin 1 is used to deposit the scrap steel of preheating, and the discharge port of its bottom is connected with elevator 3.Elevator 3 is responsible for lifting scrap steel from storage bin 1 to a certain height, prepares for subsequent metering and preheating, and the outlet of elevator 3 is provided with metering assembly below, and the metering assembly includes support frame 4, the support frame 4 is rotatably connected with rotating shaft 5, the rotating shaft 5 is rotatably connected with balance lever 6, one end of balance lever 6 is detachably installed with weight 7, the other end of balance lever 6 is fixedly connected with tray 8, the side away from weight 7 of tray 8 is provided with discharge slide 9, and discharge slide 9 is communicated with tray 8.By adjusting the weight of weight 7, the metering standard of scrap steel can be set.When the scrap steel on tray 8 reaches the predetermined weight, balance lever 6 inclines, and discharge slide 9 is opened, and scrap steel slides to receiving bin 11.

[0025] The support frame 4 is provided with a limiting rod 10, when the tray 8 is empty, the tray 8 is attached to the limiting rod 10, and the height of the tray 8 is higher than the height of the weight 7.

[0026] One side of the preheating bin 2 is communicated with the receiving bin 11, the other side of the preheating bin 2 is communicated with the discharge bin 12, the receiving bin 11 is below the discharge slide 9, one side of the discharge bin 12 is provided with a flue gas inlet 13, the bottom of the discharge bin 12 is provided with an electric door 14, and the inside of the discharge bin 12 is provided with an infrared temperature sensor. The electric door 14 is arranged at the bottom of the discharge bin 12, which is used to control the discharge time and quantity of scrap steel. The bottom of the discharge bin 12 is provided with an electric door 14 for real-time detection of whether the heated scrap steel meets the standard.

[0027] The inside of the receiving bin 11 is provided with an auger 15, the outside of the receiving bin 11 is fixedly installed with a rotary motor 16, the output end of the rotary motor 16 is drivingly connected with the auger 15, and one end of the auger 15 penetrates through the preheating bin 2 and extends to the inside of the discharge bin 12.

[0028] The discharge bin 12 is rotatably connected between the preheating bin 2, one side of the discharge bin 12 close to the preheating bin 2 is fixedly connected with a transmission gear 17, and the transmission gear 17 is coaxial with the preheating bin 2.

[0029] The preheating bin 2 is provided with a driving motor 18, the output end of the driving motor 18 is fixedly connected with a driving gear 19, and the driving gear 19 is engaged with the transmission gear 17. The discharge bin 12 and the heating bin are rotationally connected through the transmission gear 17 and the driving gear 19, the driving motor 18 drives the discharge bin 12 to rotate through the driving gear 19, so as to facilitate the adjustment of the discharge direction. At the same time, if the infrared temperature sensor detects that the temperature does not meet the standard, the discharge bin 12 is turned over, and then the auger 15 is reversed again to heat the scrap steel again, thereby ensuring the success rate of preheating all scrap steels.

[0030] Working principle:

[0031] Using the device, the storage bin 1 is used for storing scrap steels to be preheated, and the discharge port at the bottom thereof is connected with the elevator 3. The elevator 3 is responsible for lifting the scrap steels from the storage bin 1 to a certain height, and then dropping into the tray 8. As the weight on the tray 8 gradually increases, when the scrap steels on the tray 8 reach a predetermined weight, the balance rod 6 is inclined, and the discharge sliding plate 9 is opened, and the scrap steels slide to the receiving bin 11. The scrap steels are conveyed to the discharge bin 12 through the auger 15, and in the conveying process, the scrap steels are in contact with the high-temperature flue gas entering from the flue gas inlet 13, so as to perform heat exchange and heat the scrap steels. The discharge bin 12 and the heating bin are rotationally connected through the transmission gear 17 and the driving gear 19, the driving motor 18 drives the discharge bin 12 to rotate through the driving gear 19, so as to facilitate the adjustment of the discharge direction. The electric door 14 is arranged at the bottom of the discharge bin 12, and is used for controlling the discharging time and quantity of the scrap steels.

[0032] If the infrared temperature sensor detects that the temperature does not meet the standard, the discharge bin 12 is turned over, and then the auger 15 is reversed again to heat the scrap steels again, thereby ensuring the success rate of preheating all scrap steels.

[0033] Finally, the preheated scrap steels are discharged from the electric door 14 into a ladle refining furnace.

[0034] In the description of the present specification, the description of the terms "one embodiment", "example", "specific example" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The basic principle, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application.

Claims

1. A scrap preheating charging device for a ladle furnace, characterized by comprising: a scrap charging device 1; a scrap preheating device 2; and a scrap transfer device 3. Including the storage bin (1) and preheating bin (2), the bottom of the discharge port of the storage bin (1) is connected with the elevator (3), the outlet of the elevator (3) is provided with a metering assembly below, the metering assembly comprises a support frame (4), the support frame (4) is rotatably connected with a rotating shaft (5), the rotating shaft (5) is rotatably connected with a balance bar (6), one end of the balance bar (6) is detachably installed with a weight (7), the other end of the balance bar (6) is fixedly connected with a tray (8), the side of the tray (8) away from the weight (7) is provided with a discharge slide plate (9), the discharge slide plate (9) is communicated with the tray (8).

2. The scrap preheating charging device for a ladle refiner according to claim 1, characterized by The support frame (4) is provided with a limiting rod (10), when the tray (8) is empty, the tray (8) is attached to the limiting rod (10), and the height of the tray (8) is higher than the height of the weight (7).

3. The scrap preheating charging device for a ladle refiner according to claim 2, characterized by The preheating bin (2) is communicated with a receiving bin (11) on one side, and is communicated with a discharge bin (12) on the other side, the receiving bin (11) is located below the discharge slide plate (9), the discharge bin (12) is provided with a flue gas inlet (13) on one side, the bottom of the discharge bin (12) is provided with an electric door (14), and the inside of the discharge bin (12) is provided with an infrared temperature sensor.

4. The scrap preheating charging device for a ladle according to claim 3, characterized by The inside of the receiving bin (11) is provided with an auger (15), the outside of the receiving bin (11) is fixedly installed with a rotating motor (16), the output end of the rotating motor (16) is drivingly connected with the auger (15), one end of the auger (15) penetrates through the preheating bin (2) and extends to the inside of the discharge bin (12).

5. The scrap preheating charging device for a ladle according to claim 4, characterized by The discharge bin (12) is rotatably connected between the preheating bin (2), the side of the discharge bin (12) close to the preheating bin (2) is fixedly connected with a transmission gear (17), and the transmission gear (17) is coaxial with the preheating bin (2).

6. The scrap preheating charging device for a ladle according to claim 5, characterized by The preheating bin (2) is provided with a driving motor (18), the output end of the driving motor (18) is fixedly connected with a driving gear (19), and the driving gear (19) is engaged with the transmission gear (17).

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