A heat radiation type energy-saving and environment-friendly scrap steel preheating system

Abstract

The application discloses a heat radiation type energy-saving and environment-friendly scrap steel preheating system, which comprises horizontal preheating conveying mechanisms and vertical preheating conveying mechanisms, wherein the vertical preheating conveying mechanisms are connected with the horizontal preheating conveying mechanisms; the vertical preheating conveying mechanisms comprise vertical shaft stock bins, and a windproof system is arranged on the vertical shaft stock bins; the windproof system comprises a windproof pipe, a material blocking mechanism, a dynamic sealing mechanism and a convection heating windproof mechanism. The application improves the preheating temperature of the scrap steel, saves the power consumption of the electric furnace per ton of steel, shortens the smelting time, enables the scrap steel preheating to reach safety and stability, maximally recycles the heat generated after smelting, and greatly improves the heat utilization rate.

Description

Technical Field

[0001] This invention relates to a scrap steel preheating system, and more particularly to a thermal radiation type energy-saving and environmentally friendly scrap steel preheating system. Background Technology

[0002] Scrap steel is an indispensable resource for the world's steel industry. According to statistics from authoritative international organizations, nearly 40% of the world's crude steel production over the past 50 years has been made from scrap steel. The smelting of scrap steel generates a large amount of high-temperature heat. This heat is too high to be directly discharged and needs to be cooled. However, since the temperature of these flue gases can reach around 1300 degrees Celsius, cooling requires investment in cooling equipment, which occupies considerable space and is not economically efficient. To recover and utilize these high-temperature gases, the concept of preheating the scrap steel to be smelted has emerged. There are two existing preheating methods: horizontal conveying preheating and vertical shaft preheating.

[0003] Lateral conveying preheating involves installing a fume hood on the upper part of the conveyor belt, allowing heat to flow in the reverse direction from the output port of the conveyor belt to the input port. This recovers heat during the scrap steel conveying process and preheats the scrap steel. However, this preheating method has certain problems because the heat flows from the upper surface of the scrap steel layer and cannot be evenly transferred to the bottom of the conveyed material layer, resulting in uneven heat conduction and poor heat transfer effect.

[0004] Vertical shaft preheating is directly installed above the smelting electric furnace. Utilizing the principle of upward heat flow during smelting, the high-temperature flue gas flowing upwards preheats the scrap steel in the upper vertical shaft hopper. Because the flue gas can flow upwards and pass through the scrap steel layer, this method has a good preheating effect. However, since the scrap steel weighs 20-30 tons, the vertical shaft hopper and the electric furnace below are easily damaged by the scrap steel being fed from above. To solve this problem, support grates are added to the vertical shaft to receive the material and prevent damage from the falling scrap steel. Due to the non-fixed shape of the scrap steel, some relatively thin and fine pieces are mixed in during recycling. Because the vertical shaft directly... The temperature inside the vertical shaft, connected to the smelting electric furnace, reaches approximately 1300 degrees Celsius. During preheating, the relatively thin and fine scrap steel melts and flows downwards, clogging the overheating holes of the support grate. This prevents heat from penetrating the scrap steel layer upwards through the support grate, rendering it ineffective for preheating. Furthermore, because the heat is concentrated in the shaft and cannot dissipate, it can cause an explosion when the pressure reaches a certain level, leading to a serious safety hazard. In addition, once the support grate is blocked by the flowing molten steel, it is difficult to clean, resulting in the grate becoming unusable, leading to high equipment investment costs and excessive maintenance. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of the prior art by providing a thermal radiation-type energy-saving and environmentally friendly scrap steel preheating system. This thermal radiation preheating system combines existing horizontal preheating and vertical shaft preheating, possessing the advantages of both types of preheating. While ensuring preheating safety, it greatly improves the preheating effect, and is also energy-saving and environmentally friendly.

[0006] To achieve the above-mentioned technical effects, the technical solution adopted by the present invention is as follows:

[0007] The present invention relates to a thermal radiation-type energy-saving and environmentally friendly scrap steel preheating system, comprising a horizontal preheating conveying mechanism and a vertical preheating conveying mechanism connected to the horizontal preheating conveying mechanism; the vertical preheating conveying mechanism comprises a vertical shaft silo, on which a windproof system is provided, the windproof system comprising a windproof pipe, a material blocking mechanism, a dynamic sealing mechanism, and a convection heating windproof mechanism.

[0008] As a preferred embodiment of the present invention, the dynamic sealing mechanism includes an induced draft tube, an induced draft fan, an air volume sensor, and a controller. One end of the induced draft tube is connected to the feeding mechanism, and the other end of the induced draft tube is connected to the feed inlet on the vertical shaft silo. The induced draft tube is located on the side of the induced draft tube, the induced draft fan is located inside the induced draft tube, the air volume sensor is located inside the induced draft tube, and the induced draft fan is connected to the air volume sensor through the controller.

[0009] As a preferred embodiment of the present invention, the material blocking mechanism includes a mounting component, and a material blocking curtain is provided at the lower part of the mounting component; the material blocking curtain is composed of a plurality of rubber sheets arranged in parallel.

[0010] As a preferred embodiment of the present invention, the parallel rubber sheets are densely arranged, and anti-abrasion edges are provided in the feeding direction of the baffle curtain.

[0011] As a preferred embodiment of the present invention, the mounting component includes a hanger, on which a rotating shaft is provided, and the baffle curtain is installed at the lower part of the hanger via the rotating shaft.

[0012] As a preferred embodiment of the present invention, the convection heating windproof mechanism includes a gate valve, an upper exhaust port and a lower exhaust port. The valve is located at the feed inlet of the vertical shaft silo, and the upper exhaust port and the lower exhaust port are located on the silo body of the vertical shaft silo.

[0013] As a preferred embodiment of the present invention, a discharge port and a pushing device are provided at the lower part of the vertical shaft silo. The pushing device is located on the opposite side of the discharge port. The pushing device includes a slide, a push plate and a hydraulic system. The slide is located inside the lower part of the vertical shaft silo, the push plate is located at the root of the slide, and the rear part of the push plate is connected to the output end of the hydraulic system.

[0014] As a preferred embodiment of the present invention, air holes are evenly distributed on the slide rail, which is horizontally or inclinedly arranged.

[0015] As a preferred embodiment of the present invention, the hydraulic system includes a base, a hydraulic seat, and at least one hydraulic cylinder. The hydraulic cylinder is fixed to the base via the hydraulic seat, and the output end of the hydraulic cylinder is connected to the rear of the push plate.

[0016] As a preferred embodiment of the present invention, an exhaust system is connected to the upper exhaust port and the lower exhaust port. The exhaust system includes an upper exhaust pipe, a lower exhaust pipe, a main duct, and a regulating valve. The upper exhaust pipe is connected to the upper exhaust port, and the lower exhaust pipe is connected to the lower exhaust port. The rear ends of both the upper and lower exhaust pipes are connected to the main duct. The regulating valve is located between the upper and lower exhaust pipes.

[0017] The beneficial effects of this invention are:

[0018] This invention can increase the preheating temperature of scrap steel to 600-800 degrees Celsius, saving the electricity consumption per ton of steel in electric furnaces and shortening the smelting time.

[0019] This invention combines horizontal conveying preheating and vertical shaft preheating, enabling scrap steel preheating to achieve safety and stability while maximizing the recovery of heat generated after smelting, thus greatly improving heat utilization.

[0020] This invention has the advantages of a horizontal preheating conveyor mechanism, which keeps the electric furnace molten pool stable during continuous feeding and allows the scrap steel entering the electric furnace to melt quickly when immersed in molten steel. At the same time, it avoids the disadvantages of the traditional vertical shaft hopper being directly set on the top of the electric furnace, which causes several tons of scrap steel to be directly thrown downwards during feeding, generating a large impact force and causing the furnace temperature to drop rapidly, resulting in a long melting time.

[0021] The invention also includes a windproof system, which prevents external air from being brought into the vertical shaft silo during scrap steel feeding, thus preventing a decrease in the temperature inside the silo and affecting the preheating effect. Attached Figure Description

[0022] Figure 1 This is the front view of the present invention.

[0023] Figure 2 This is a schematic diagram of the material blocking mechanism.

[0024] Figure 3 This is a schematic diagram of the dynamic sealing mechanism.

[0025] Figure 4 This is a schematic diagram of the feeding device.

[0026] Figure 5 This is a schematic diagram of the ventilation system. Detailed Implementation

[0027] As shown in the attached diagram, the thermal radiation-type energy-saving and environmentally friendly scrap steel preheating system includes a horizontal preheating conveying mechanism and a vertical preheating conveying mechanism, which are connected to each other. By connecting the vertical and horizontal preheating conveying mechanisms, and with the horizontal preheating conveying mechanism connected to the electric furnace, the high-temperature gas generated during the furnace's smelting process first flows backward through the horizontal preheating conveying mechanism and then enters the vertical preheating conveying mechanism connected to it for preheating. By first entering the horizontal preheating conveying mechanism, the scrap steel enters the heating zone before entering the furnace and is heated by the counter-current hot gas from the furnace. During continuous feeding via the horizontal conveying mechanism, the furnace molten pool remains stable, and the scrap steel entering the furnace is immersed in the molten steel for melting. This avoids the drawbacks of having a vertical hopper directly on top of the furnace, where several tons of scrap steel directly impact the furnace during unloading, causing a rapid drop in furnace temperature and resulting in a long smelting time.

[0028] The vertical preheating conveyor is located behind the horizontal preheating conveyor. When the high-temperature gas generated during electric furnace smelting enters the horizontal preheating conveyor to preheat the scrap steel within it, it then flows into the vertical preheating conveyor, which is connected to the horizontal conveyor, to preheat the scrap steel again. The vertical preheating conveyor includes a vertical shaft silo 1, which is equipped with a windproof system. This system prevents external air from being drawn into the silo during feeding, thus preventing a drop in temperature and ensuring effective preheating.

[0029] Furthermore, the windproof system includes a windproof pipe 2, a material blocking mechanism, a dynamic sealing mechanism, and a convection heating windproof mechanism. By configuring the windproof system with these components, the scrap steel conveyed by the conveying mechanism can be windproofed before entering the vertical shaft silo. The material blocking mechanism provides primary windproofing and also limits the excessive flow rate of the scrap steel. The dynamic sealing mechanism monitors the residual air in the windproof pipe; when the residual air volume reaches a set value, it draws the residual air outward, preventing it from entering the vertical shaft silo. The convection heating windproof mechanism draws away the external residual air brought in by the scrap steel during discharge from the feed inlet and also draws high-temperature gas from the lower part of the vertical shaft silo to the upper part. This upward flow of high-temperature gas preheats the scrap steel layer inside the silo, achieving a windproof preheating effect.

[0030] The material blocking mechanism is located at the discharge port of the conveying mechanism, which can be a conveyor belt or other conveying equipment. The material blocking mechanism includes an installation component, and a material blocking curtain is provided at the lower part of the installation component. The material blocking curtain is composed of several rubber sheets 5 arranged in parallel. By configuring the material blocking mechanism with an installation component and a material blocking curtain at the lower part of the installation component, it can block the external air brought in when the material is fed from the conveying mechanism, and at the same time limit the feeding amount of scrap steel, preventing the material from impacting the lower hopper due to excessive feeding speed.

[0031] The densely arranged parallel rubber sheets 5, by configuring the baffle curtain as a structure composed of several parallel rubber sheets, improve wear resistance and extend the service life of the rubber sheets. Furthermore, the rubber sheets themselves prevent direct contact with the scrap steel, thus preventing the scrap steel from getting stuck. An anti-wear edge is provided in the feeding direction of the rubber sheets 5. This anti-wear edge can be an additional layer of wear-resistant material, or it can be achieved by widening the feeding direction of the baffle curtain and setting it into a curved shape.

[0032] Preferably, the rubber sheet can be fan-shaped, elliptical, or teardrop-shaped. By designing the rubber sheet to be narrower at the top and wider at the bottom, more space can be reserved inside the air duct for the rubber sheet to swing, allowing the rubber sheet to swing adaptively according to the impact of the feed, preventing the rubber sheet from being too rigidly positioned due to insufficient swing space, thus avoiding material jamming during feeding.

[0033] The mounting component includes a hanger 6, on which a pivot 7 is mounted. The rubber sheet 5 is mounted on the lower part of the hanger 6 via the pivot 7. The pivot allows the rubber sheet to be suspended from the top of the duct in a swinging manner, enabling the angle of the rubber sheet to be adaptively adjusted according to the influx of scrap steel.

[0034] Specifically, the dynamic sealing mechanism includes an induced draft duct 3, an induced draft fan 4, an air volume sensor, and a controller. One end of the windproof duct 2 is connected to the feeding mechanism, and the other end is connected to the feed inlet on the vertical shaft silo 1. The induced draft duct 3 is located on the side of the windproof duct 2. The induced draft fan 4 is located inside the induced draft duct 3, and the air volume sensor is located inside the windproof duct 2. The induced draft fan 4 is connected to the air volume sensor through the controller. By configuring the dynamic sealing mechanism into a structure including the induced draft duct 3, the induced draft fan 4, the air volume sensor, and the controller, when the residual air volume entering the windproof duct reaches a set value, the air volume sensor transmits a signal to the controller, thereby activating the induced draft fan to draw away the residual air in the windproof duct.

[0035] The convection heating windproof mechanism includes a gate valve 8, an upper exhaust port 9, and a lower exhaust port 10. The gate valve 8 is located at the feed inlet of the vertical shaft silo 1, and the upper exhaust port 9 and lower exhaust port 10 are located vertically on the silo body of the vertical shaft silo 1. By configuring the convection heating windproof mechanism into a structure including a gate valve 8, an upper exhaust port 9, and a lower exhaust port 10,

[0036] Gate valve 8, the upper exhaust port, and the lower exhaust port are connected to the controller. The controller can control the opening and closing of the valve, the upper exhaust port, and the lower exhaust port. When scrap steel is added, the gate valve opens, the upper exhaust port closes, and the lower exhaust port opens, so that the external residual air entering with the scrap steel can be discharged from the lower exhaust port at the bottom of the bin, thereby preventing residual air from entering the furnace. When scrap steel is stopped being added, the gate valve closes, the upper exhaust port opens, and the lower exhaust port closes, thereby drawing the high-temperature flue gas from the bottom of the bin to the top of the bin, achieving full-contact thermal radiation preheating of the scrap steel layer in the bin. This fully utilizes the high-temperature flue gas discharged during smelting to improve smelting efficiency. At the same time, the preheating of the scrap steel cools the high-temperature flue gas, thereby meeting the flue gas temperature emission standards, eliminating the need for further cooling.

[0037] To prevent scrap steel from impacting the equipment below the shaft silo directly from the feed inlet at the top, a discharge port 11 and a pushing device are installed at the bottom of the shaft silo 1. The pushing device is located on the opposite side of the discharge port 11. The pushing device serves two purposes: firstly, to absorb the impact force of the scrap steel falling from above, and secondly, to prevent the scrap steel entering the shaft silo from rushing into the horizontal conveying mechanism and causing the horizontal conveying mechanism to be unable to convey the scrap steel in time and become blocked.

[0038] The feeding device includes a slide 12, a pusher plate 13, and a hydraulic system. The slide 12 is located inside the lower part of the vertical shaft silo 1, and the pusher plate 13 is located at the root of the slide 12, with its rear end connected to the output end of the hydraulic system. By configuring the feeding device into a structure including a slide, a pusher plate, and a hydraulic system, the slide receives the scrap steel falling from above, and the hydraulic system controls the pusher plate to push and retract forward on the slide, thus feeding the scrap steel downwards. This pushing feeding method prevents excessively fast feeding. Simultaneously, rhythmic control achieves uniform feeding and preheating.

[0039] Preferably, the slide 12 is evenly distributed with air holes. By setting air holes in the slide, the slide is transformed into a grate-like function, allowing the high-temperature flue gas below to flow upwards through the air holes, thus improving the preheating effect of the scrap steel layer on the slide. Since the high-temperature gas generated during smelting is preheated by the horizontal preheating conveyor before entering the vertical shaft silo, the temperature has already dropped to around 800 degrees Celsius. This prevents the thin / small scrap steel on the upper layer of the slide from melting prematurely due to excessive temperature, thus avoiding the problem of air hole blockage on the slide and eliminating safety hazards. The slide 12 can be horizontally or inclined. An inclined slide allows for smoother scrap steel feeding.

[0040] The hydraulic system includes a base 14, a hydraulic seat 15, and at least one hydraulic cylinder 16. The hydraulic cylinder 16 is fixed to the base 14 via the hydraulic seat 15, and the output end of the hydraulic cylinder 16 is connected to the rear of the push plate 13. By configuring the hydraulic system into a structure including a base, a hydraulic seat, and at least one hydraulic cylinder, the base is used to fix the installation position of the hydraulic cylinder, and the hydraulic seat is used to fix the hydraulic cylinder to the base. When pushing material, the extension rod of the hydraulic cylinder extends, thereby synchronously driving the push plate located at the front end of the extension rod of the hydraulic cylinder to move forward, thereby pushing the scrap steel located at the front end of the push plate to be fed into the horizontal preheating conveyor mechanism.

[0041] Because the high-temperature heat generated during scrap steel smelting will contain some dust, and if this dust is directly discharged into the air, it will not meet the emission standards. In order to improve the working environment and optimize the dust level of the exhaust smoke, an exhaust system is connected to the upper exhaust port 9 and the lower exhaust port 10. The exhaust system includes an upper exhaust pipe 17, a lower exhaust pipe 18, a main air duct 19 and a regulating valve 20. The upper exhaust pipe 17 is connected to the upper exhaust port 9, and the lower exhaust pipe 18 is connected to the lower exhaust port 10. The rear ends of the upper exhaust pipe 17 and the lower exhaust pipe 18 are both connected to the main air duct 19. The regulating valve 20 is located between the upper exhaust pipe 17 and the lower exhaust pipe 18. By configuring the ventilation system into an upper ventilation duct, a lower ventilation duct, a main duct, and a regulating valve, with the main duct connected to the dust settling chamber, the flue gas extracted from the silo is introduced into the dust settling chamber for dust suppression. The regulating valve located between the upper and lower ventilation ducts corresponds to the opening and closing of the upper and lower ventilation ports, thereby introducing the flue gas from the vertical shaft silo into the main duct and then into the dust settling chamber for dust treatment. The exhaust fan can be installed in the main duct, or separately in the upper and lower ventilation ports; the installation method is not limited. Furthermore, the operation of the upper and lower ventilation ducts can be adjusted according to the amount of material: when there is a lot of material, the upper ventilation duct is open and the lower ventilation duct is closed; when there is a little material, the lower ventilation duct is open and the upper ventilation duct is closed.

[0042] The working principle of this invention is as follows:

[0043] During feeding:

[0044] Scrap steel enters the windproof pipe from the conveying mechanism. The material baffle curtain hanging at the inlet end of the windproof pipe blocks the external wind from entering the conveying mechanism. The scrap steel passes through the material passage between the material baffle curtain and the lower wall of the windproof pipe. At the same time, the material baffle curtain can limit the amount of scrap steel fed in, preventing the material from impacting the lower hopper if the feeding is too fast.

[0045] When scrap steel enters the windproof duct, the air volume sensor located inside the windproof duct can monitor the residual air inside the windproof duct. When the residual air volume reaches the set value, the air volume sensor transmits the signal to the controller, and then the controller starts the induced draft fan, thereby drawing the residual air that has entered the windproof duct outward and preventing the residual air from entering the vertical shaft silo.

[0046] As the scrap steel continues to enter the vertical shaft silo, the gate valve opens, the upper exhaust port closes, and the lower exhaust port opens. The fan inside the exhaust port discharges the external residual air that enters with the scrap steel from the lower exhaust port at the bottom of the silo, preventing the residual air from entering the smelting electric furnace.

[0047] When scrap steel feeding stops, the conveying mechanism stops feeding, the gate valve at the top of the vertical shaft silo closes, the upper exhaust vent on the vertical shaft silo opens, and the lower exhaust vent closes.

[0048] During preheating:

[0049] The high-temperature gas generated by the electric furnace smelting enters the feeding belt of the horizontal preheating conveyor to preheat the scrap steel located in the horizontal preheating conveyor. Then, the high-temperature gas flows into the vertical shaft hopper connected to the horizontal preheating conveyor to preheat the scrap steel layer located in the vertical shaft hopper. Since the upper exhaust port on the vertical shaft hopper is open and the lower exhaust port is closed, the high-temperature gas in the lower part of the vertical shaft hopper is introduced from the through hole on the slide to the upper part of the vertical shaft hopper by the suction force of the upper exhaust port, and then extracted from the upper exhaust port, so as to achieve full contact thermal radiation preheating of the scrap steel layer in the vertical shaft hopper.

[0050] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been described above with reference to preferred embodiments, it is not intended to limit the present invention. Any modifications or alterations made by those skilled in the art without departing from the scope of the present invention are equivalent embodiments. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention are still within the scope of the present invention.

Claims

1. A heat radiation type energy saving and environment friendly scrap steel preheating system comprising a horizontal preheating and conveying mechanism, characterized in that: The vertical preheating conveying mechanism is connected with the horizontal preheating conveying mechanism; the vertical preheating conveying mechanism comprises a vertical shaft stock bin (1), a windproof system is arranged on the vertical shaft stock bin (1), the windproof system comprises a windproof pipe (2), a material blocking mechanism, a dynamic sealing mechanism and a convection heating windproof mechanism; the dynamic sealing mechanism comprises a draft tube (3), a draft fan (4), an air volume sensor and a controller, one end of the windproof pipe (2) is connected with the feeding mechanism, the other end of the windproof pipe (2) is connected with a feeding port on the vertical shaft stock bin (1), the draft tube (3) is arranged on the side of the windproof pipe (2), the draft fan (4) is arranged in the draft tube (3), the air volume sensor is arranged in the windproof pipe (2), and the draft fan (4) is connected with the air volume sensor through the controller; the convection heating windproof mechanism comprises a gate valve (8), an upper air outlet (9) and a lower air outlet (10), the gate valve (8) is arranged at the feeding port of the vertical shaft stock bin (1), and the upper air outlet (9) and the lower air outlet (10) are arranged on the bin body of the vertical shaft stock bin (1) in a staggered mode; an air draft system is connected at the upper air outlet (9) and the lower air outlet (10), the air draft system comprises an upper air draft pipe (17), a lower air draft pipe (18), a total air pipe (19) and an adjusting valve (20), the upper air draft pipe (17) is connected with the upper air outlet (9), the lower air draft pipe (18) is connected with the lower air outlet (10), rear ends of the upper air draft pipe (17) and the lower air draft pipe (18) are connected with the total air pipe (19), and the adjusting valve (20) is arranged between the upper air draft pipe (17) and the lower air draft pipe (18); the scrap steel conveyed by the self-conveying mechanism is subjected to windproof treatment before entering the vertical shaft stock bin, the material blocking mechanism performs primary windproof, and has the effect of limiting the flow speed of the scrap steel from being too fast; the dynamic sealing mechanism monitors the residual wind in the windproof pipe, and when the residual wind reaches a set value, the residual wind in the windproof pipe is drawn out, so that the residual wind is prevented from entering the vertical shaft stock bin; the convection heating windproof mechanism draws out the external residual wind brought in by the scrap steel when the scrap steel is discharged from the feeding port, and also has the effect of drawing the high-temperature gas at the lower part of the vertical shaft stock bin to the upper part of the vertical shaft stock bin, so that the scrap steel layer in the vertical shaft stock bin is preheated in the process that the high-temperature gas flows upwards, thereby achieving the effect of windproof preheating; when the scrap steel is fed, the gate valve is opened, the upper air outlet is closed, and the lower air outlet is opened, so that the external residual wind brought in with the scrap steel is discharged from the lower air outlet at the lower part of the bin body, thereby preventing the residual wind from entering the furnace; when the scrap steel stops being fed, the gate valve is closed, the upper air outlet is opened, and the lower air outlet is closed, so that the high-temperature flue gas during smelting is led from the lower part of the bin body to the upper part of the bin body, the scrap steel layer in the bin body is preheated in a full-contact heat radiation mode, the high-temperature flue gas discharged during smelting is fully utilized to improve the smelting efficiency, the scrap steel is preheated to realize the cooling of the high-temperature flue gas, thereby meeting the temperature emission standard of the flue gas, and cooling is not needed again; The material blocking mechanism comprises a mounting member, a material blocking curtain is arranged at the lower part of the mounting member, the material blocking curtain is composed of a plurality of rubber sheets (5) arranged side by side, the rubber sheets (5) are densely arranged, wear-resistant edges are arranged in the feeding direction of the rubber sheets (5), the mounting member comprises a hanger (6), a rotating shaft (7) is arranged on the hanger (6), and the rubber sheets (5) are installed on the lower part of the hanger (6) through the rotating shaft (7).

2. The heat radiation type energy-saving and environment-friendly scrap steel preheating system according to claim 1, characterized in that: A discharge port (11) and a pushing device are arranged at the lower part of the vertical shaft stock bin (1), the pushing device is located on the opposite side of the discharge port (11), the pushing device comprises a slide (12), a pushing plate (13) and a hydraulic system, the slide (12) is arranged below the inside of the vertical shaft stock bin (1), the pushing plate (13) is located at the root of the slide (12), and the rear part of the pushing plate (13) is connected with the output end of the hydraulic system.

3. The heat radiation type energy-saving and environment-friendly scrap steel preheating system according to claim 2, characterized in that: Air holes are uniformly distributed on the slide (12), and the slide (12) is arranged horizontally or obliquely.

4. The heat radiation type energy-saving and environment-friendly scrap steel preheating system according to claim 2, characterized in that: The hydraulic system comprises a base (14), a hydraulic seat (15) and at least one hydraulic cylinder (16), the hydraulic cylinder (16) is fixed on the base (14) through the hydraulic seat (15), and the output end of the hydraulic cylinder (16) is connected with the rear part of the pushing plate (13).

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