Automatic feeding device for high temperature furnace

Abstract

This utility model discloses an automatic feeding device for a high-temperature furnace, aiming to solve the problems of high physical exertion, high safety risks, poor environment, and low accuracy associated with traditional manual feeding. The device includes a high-temperature furnace, a buffer hopper, a feeding inclined pipe, a pusher cylinder, a pusher plate, an electric gate valve, and a flue gas collection structure. The buffer hopper is equipped with a guide plate and a V-shaped fixed buffer plate. The pusher cylinder drives an L-shaped pusher plate to push the ore into the feeding inclined pipe. A movable buffer plate with a torsion spring is hinged inside the inclined pipe to reduce the impact of the ore. An electric gate valve controls the flow in the straight pipe section. The flue gas collection pipe, in conjunction with a negative pressure mechanism, treats flue gas dust. A distance sensor monitors the feeding status. The device achieves automatic buffering, pushing, and furnace feeding of the ore, eliminating the need for manual on-site operation, improving feeding stability and safety, improving the working environment, and ensuring the efficient operation of the high-temperature furnace.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature furnace material conveying technology, specifically an automatic feeding device for high-temperature furnaces. Background Technology

[0002] In industries such as metallurgy and mineral processing, high-temperature furnaces (such as ore roasting furnaces and mineral smelting furnaces) are the core equipment for high-temperature ore processing. Their feeding process requires stable conveying of the ore (mostly in lumpy or granular form, sometimes containing hard impurities) based on its physical characteristics. Currently, ore feeding largely relies on traditional manual methods, which are poorly adapted to ore feeding and have the following drawbacks: 1. The ore is mostly in blocky shape, hard and has poor fluidity. Workers need to repeatedly strike the gate valve with an iron hammer to overcome the ore extrusion resistance in order to control the feed. When the ore clumps or contains impurities, it is necessary to strike it with even greater force. Irregular ore is also easy to block the feed inlet and needs to be cleaned manually. It consumes a lot of physical strength and the stability of the feed is difficult to guarantee. 2. The surface temperature of the high-temperature furnace is 300-800℃, the radiation at the feed inlet is strong, and the falling ore collision produces slag fragments with a temperature of over 100℃ that splashes out. The flue gas inside the furnace is easy to escape, and workers who operate at close range are easily burned and scratched. In addition, improper striking force can easily cause "material collapse" or backflow of flue gas, making the safety hazards far greater than other material feeding scenarios. 3. Friction and collision during ore handling and falling generate mineral dust (such as iron dust and heavy metal dust). The flue gas in the furnace also contains harmful gases such as hydrogen sulfide. In addition, workers do not have effective isolation and protection. Suspended dust can easily lead to occupational diseases such as pneumoconiosis. The accumulation of slag and dust also increases the on-site safety risks. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an automatic feeding device for high-temperature furnaces, which can realize the purpose of remote feeding operation of high-temperature furnaces, reduce personnel safety risks, and solve the problems of on-site quantity control, impurity removal and pollution.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: an automatic feeding device for a high-temperature furnace, including a high-temperature furnace and a buffer hopper, wherein the buffer hopper is provided with a feeding inclined pipe, and the feeding inclined pipe is connected to the feeding port at the top of the high-temperature furnace; The buffer hopper is equipped with a pusher cylinder on its side wall. The pusher rod of the pusher cylinder is inserted into the buffer hopper, and a pusher plate is provided on the end of the pusher rod. The pusher plate is used to push the material input from the top of the buffer hopper into the upper inlet of the discharge inclined pipe.

[0005] In a preferred embodiment, the buffer hopper is provided with guide plates that slope from both sides toward the center, and the pusher plate is an L-shaped plate with the horizontal part of the pusher plate located at the top and flush with the lower end of the guide plate.

[0006] In a preferred embodiment, a V-shaped fixed buffer plate is provided in the buffer hopper above the guide plate. The fixed buffer plate extends downward from the middle to both sides, and is used to guide the material input from the top of the buffer hopper to the guide plates on both sides.

[0007] In a preferred embodiment, the inflection point of the pusher plate is provided with a slope.

[0008] In a preferred embodiment, the side wall of the buffer hopper is provided with an opening, a sealing ring is provided in the opening, and one end of the horizontal part of the pusher plate passes through the sealing ring and extends to the outside of the buffer hopper.

[0009] In a preferred embodiment, a distance sensor is provided on the side wall of the buffer hopper where the pusher cylinder is located, and the probe of the distance sensor is inserted into the buffer hopper and positioned facing the vertical part of the pusher plate.

[0010] In a preferred embodiment, the feed pipe includes an inclined pipe section and a straight pipe section; The inclined tube section has a hinge seat located near the bottom of the inner part, and a movable buffer plate is hinged to the hinge seat. A torsion spring is configured at the hinge point.

[0011] In a preferred embodiment, an electric gate valve is provided near the bottom of the straight pipe section.

[0012] In a preferred embodiment, a flue gas collection pipe is provided on the upward extension section of the straight pipe section.

[0013] In a preferred embodiment, a reducing pipe is connected to the flue gas collection pipe. The diameter of the reducing pipe is smaller than that of the flue gas collection pipe, and the reducing pipe is connected to a negative pressure mechanism.

[0014] The automatic feeding device for a high-temperature furnace provided by this utility model, by adopting the above-described structure, has the following beneficial effects: (1) The ore is guided to gather by the guide plate of the buffer hopper, and the pusher cylinder drives the pusher plate to automatically push the ore into the feed pipe. There is no need for workers to hold a hammer to hit the gate valve, which completely replaces manual operation. At the same time, the design of the L-shaped pusher plate and the lower end of the guide plate can adapt to the poor flow characteristics of block ore, avoid ore accumulation and blockage, and eliminate the need for manual cleaning, which significantly reduces physical labor consumption. Moreover, the pusher cylinder runs stably, which can ensure continuous and uniform ore feeding and solve the problem of poor feeding stability in the traditional method. (2) The automated drive structure of the pusher cylinder and the pusher plate allows workers to stay away from the high temperature furnace feed port and the high temperature radiation of 300-800℃. The movable buffer plate of the feed inclined pipe, combined with the torsion spring, can slow down the falling speed of the block ore and reduce the splashing of slag above 100℃. The flue gas collection pipe and negative pressure mechanism set at the same time can discharge the flue gas that escapes from the furnace in time and avoid backflow of flue gas. (3) The pusher cylinder, in conjunction with the distance sensor, can precisely control the pushing stroke of the pusher plate, thereby adjusting the amount of ore entering the feed pipe, avoiding the problem of excessive or insufficient gate opening caused by traditional manual knocking, preventing ore accumulation from forming a "dead zone" that affects reaction efficiency, and avoiding the sudden rise in furnace temperature caused by feed interruption. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the material pushing part in the buffer hopper of this utility model.

[0017] Figure 3 This is a structural diagram showing the location of the movable buffer plate in this utility model.

[0018] In the diagram: 1. High-temperature furnace; 2. Buffer silo; 3. Inclined discharge pipe; 4. Pusher plate; 5. Pusher cylinder; 6. Electric gate valve; 7. Guide plate; 8. Fixed buffer plate; 9. Slope; 10. Sealing ring; 11. Distance sensor; 12. Movable buffer plate; 13. Hinge seat; 14. Torsion spring; 15. Flue gas collection pipe; 16. Reducer pipe. Detailed Implementation

[0019] This embodiment provides an automatic feeding device for a high-temperature furnace, including a high-temperature furnace 1 and a buffer hopper 2. The buffer hopper 2 is provided with a feeding inclined pipe 3, which is connected to the feeding port at the top of the high-temperature furnace 1. The buffer hopper 2 is provided with a push cylinder 5 on its side wall. The push rod of the push cylinder 5 is inserted into the buffer hopper 2. The end of the push rod is provided with a push plate 4. The push plate 4 is used to push the material input from the top of the buffer hopper 2 into the upper inlet of the discharge inclined pipe 3.

[0020] In a preferred embodiment, the buffer hopper 2 is provided with a guide plate 7 that slopes from both sides toward the center, and the pusher plate 4 is an L-shaped plate with its horizontal part located at the top and flush with the lower end of the guide plate 7.

[0021] In a preferred embodiment, a V-shaped fixed buffer plate 8 is provided in the buffer hopper 2 above the guide plate 7. The fixed buffer plate 8 extends downward from the middle to both sides, and is used to guide the material input from the top of the buffer hopper 2 to the guide plates 7 on both sides.

[0022] In a preferred embodiment, a slope 9 is provided at the inflection point of the pusher plate 4.

[0023] In a preferred embodiment, the side wall of the buffer hopper 2 is provided with an opening, and a sealing ring 10 is provided in the opening. One end of the horizontal part of the pusher plate 4 passes through the sealing ring 10 and extends to the outside of the buffer hopper 2.

[0024] In a preferred embodiment, a distance sensor 11 is provided on the side wall of the buffer hopper 2 where the pusher cylinder 5 is located. The probe of the distance sensor 11 is inserted into the buffer hopper 2 and is positioned facing the vertical part of the pusher plate 4.

[0025] In a preferred embodiment, the feed pipe 3 includes an inclined pipe section and a straight pipe section; The inclined tube section has a hinge seat 13 located near the bottom of the inner part, and a movable buffer plate 12 is hinged to the hinge seat 13. A torsion spring 14 is configured at the hinge point.

[0026] In a preferred embodiment, an electric gate valve 6 is provided near the bottom of the straight pipe section.

[0027] In a preferred embodiment, a flue gas collection pipe 15 is provided on the upward extension section of the straight pipe section.

[0028] In a preferred embodiment, a reducing pipe 16 is connected to the flue gas collection pipe 15. The diameter of the reducing pipe 16 is smaller than the diameter of the flue gas collection pipe 15, and the reducing pipe 16 is connected to the negative pressure mechanism.

[0029] The automatic feeding device for a high-temperature furnace disclosed in this utility model has the following process during the feeding operation: (1) Feeding preparation: Start the high-temperature furnace 1 to preheat to the working temperature (800-900℃), turn on the negative pressure fan to put the flue gas collection pipe 15 in a negative pressure state, and preset the single feeding amount (e.g., 50kg / time), the stroke of the pusher plate 4 and the opening and closing interval of the electric gate valve 6 through the control system. (2) Ore buffering and pushing: The ore conveyor belt transports the lumpy iron ore to the top inlet of the buffer silo 2. After passing through the V-shaped fixed buffer plate 8, the ore is diverted to the guide plates 7 on both sides. The iron ore slides down the guide plates and gathers in front of the horizontal part of the pusher plate 4. After receiving the start signal, the control system drives the pusher cylinder 5 to extend its push rod, which drives the horizontal part of the pusher plate 4 forward, pushing the gathered iron ore into the upper inlet of the discharge inclined pipe 3. The distance sensor 11 monitors the position of the pusher plate in real time. When the pusher plate advances to the preset stroke, the feedback signal is sent to the control system, and the pusher cylinder push rod retracts. (3) Ore buffering and furnace feeding: After the iron ore enters the inclined section of the feeding pipe 3, it first impacts the movable buffer plate 12. The movable buffer plate 12 rotates around the hinge seat 13, and the torsion spring 14 compresses and absorbs the impact energy, slowing down the falling speed of the iron ore and avoiding direct impact on the electric gate valve 6. The control system simultaneously opens the electric gate valve 6, and the buffered iron ore enters the high-temperature furnace 1 along the straight pipe section. At the same time, the flue gas escaping from the furnace is sucked into the flue gas collection pipe 15, accelerated through the reducing pipe 16, and discharged to the workshop exhaust gas treatment system by the negative pressure fan.

[0030] (4) Feed control and abnormal handling: When the material level sensor in the high-temperature furnace 1 detects that the amount of ore has reached the preset value, it sends a feedback signal to the control system, and the electric gate valve 6 closes. If the distance sensor 11 detects that the pusher plate 4 is obstructed and the pusher stroke has not reached the preset value, the control system immediately stops the pusher cylinder and triggers an audible and visual alarm to remind the workers to check. If the movable buffer plate 12 is affected by large impurities (such as scrap iron) and the angle is abnormal, the system will also alarm, and the workers can open the inclined tube inspection door to clean the impurities. Continuous operation: Repeat the above "push-buffer-furnace feeding" process to achieve continuous and automatic feeding of iron ore. No workers are required to operate on-site. The equipment's operating status (push cylinder stroke, gate valve opening and closing, flue gas concentration, etc.) can be viewed on the monitoring screen in the central control room.

Claims

1. A high-temperature furnace automatic discharging device, comprising a high-temperature furnace (1), characterized in that: It also includes a buffer silo (2), on which a feeding inclined pipe (3) is provided, and the feeding inclined pipe (3) is connected to the feed inlet at the top of the high temperature furnace (1); The buffer hopper (2) is provided with a push cylinder (5) on its side wall. The push rod part of the push cylinder (5) is inserted into the buffer hopper (2). The push rod end is provided with a push plate (4). The push plate (4) is used to push the material input from the top of the buffer hopper (2) into the upper inlet of the discharge inclined pipe (3).

2. The automatic discharging device of high-temperature furnace according to claim 1, characterized in that: The buffer hopper (2) is provided with a guide plate (7) that slopes from both sides to the middle. The push plate (4) is an L-shaped plate with the horizontal part of the push plate (4) located at the top and flush with the lower end of the guide plate (7).

3. The automatic discharging device of high-temperature furnace according to claim 2, characterized in that: The buffer hopper (2) above the guide plate (7) is provided with a V-shaped fixed buffer plate (8). The fixed buffer plate (8) extends downward from the middle to both sides to guide the material input from the top of the buffer hopper (2) to the guide plates (7) on both sides.

4. The automatic discharging device of high-temperature furnace according to claim 2, characterized in that: The pusher plate (4) has a slope (9) at the inflection point.

5. The automatic discharging device of high-temperature furnace according to claim 2, characterized in that: The buffer hopper (2) has an opening on its side wall, and a sealing ring (10) is installed in the opening. One end of the horizontal part of the pusher plate (4) passes through the sealing ring (10) and extends to the outside of the buffer hopper (2).

6. The automatic feeding device for a high-temperature furnace according to claim 1, characterized in that: A distance sensor (11) is provided on the side wall of the buffer hopper (2) where the push cylinder (5) is located. The probe of the distance sensor (11) is inserted into the buffer hopper (2) and is set towards the vertical part of the push plate (4).

7. The automatic discharging device of high-temperature furnace according to claim 1, characterized in that: The feeding inclined tube (3) includes an inclined tube section and a straight tube section; The inclined tube section has a hinge seat (13) located near the bottom of the inner part, and a movable buffer plate (12) is hinged on the hinge seat (13). A torsion spring (14) is provided at the hinge point.

8. The automatic discharging device of high-temperature furnace according to claim 7, characterized in that: An electric gate valve (6) is installed near the bottom of the straight pipe section.

9. The automatic discharging device of high-temperature furnace according to claim 7 or 8, characterized in that: A flue gas collection pipe (15) is provided on the upward extension of the straight pipe section.

10. The automatic discharging device of a high-temperature furnace according to claim 9, characterized in that: A reducing pipe (16) is connected to the flue gas collection pipe (15). The diameter of the reducing pipe (16) is smaller than the diameter of the flue gas collection pipe (15). The reducing pipe (16) is connected to the negative pressure mechanism.

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