Steel belt reduction furnace for preparing metal powder

Abstract

The utility model relates to a steel belt reduction furnace for preparing metal powder, which comprises a hearth and a transmission steel belt, the transmission steel belt penetrates into the hearth from a furnace head and penetrates out of a furnace tail, the furnace head is provided with a water seal device, and the furnace tail is provided with a cleaning device for cleaning the transmission steel belt. The transmission steel belt penetrates through the water seal device and enters the hearth from the furnace end, and smoke generated by the hearth is discharged through a flue arranged on the side close to the furnace end. According to the utility model, the water seal device is used for sealing the furnace end, so that the hearth is always kept in a positive pressure state, air is prevented from entering the hearth, and the production safety is greatly improved; meanwhile, the discharged flue gas is directly introduced into water for dust falling and impurity removal, and then relatively pure gas is stored for sale or for other purposes, so that clean production is realized, environmental pollution is reduced, and the whole production cost is reduced.

Description

Technical Field

[0001] The utility model relates to a steel belt reduction furnace. Background Art

[0002] The steel belt reduction furnace is a powder metallurgy device that uses a driving steel belt as a powder carrier to reduce materials in a reducing atmosphere. During the working process, the raw materials in the reduction furnace undergo a high-temperature reduction reaction under the action of the reducing atmosphere, thereby generating metal powders such as iron-nickel powders, and these metal powders are collected by the driving steel belt. The existing steel belt reduction furnaces have the following disadvantages: 1. The furnace head is not sealed enough, and air is likely to enter the furnace chamber, which may pose a safety hazard; 2. The residual powder on the driving steel belt is not removed thoroughly enough, which easily leads to low product quality; 3. The flue gas generated during the reaction in the furnace chamber is not treated thoroughly enough, which easily causes environmental pollution. Content of the Utility Model

[0003] In view of the above technical problems, the utility model provides a steel belt reduction furnace for preparing metal powders with safe production and clean emissions.

[0004] The technical solution adopted by the utility model to solve the above technical problems is as follows: A steel belt reduction furnace for preparing metal powders includes a furnace chamber and a driving steel belt that penetrates into the furnace chamber from the furnace head and exits from the furnace tail. The furnace head is provided with a water seal device, and the furnace tail is provided with a cleaning device for cleaning the driving steel belt. The driving steel belt passes through the water seal device and enters the furnace chamber from the furnace head, and the flue gas generated by the furnace chamber is discharged through a flue arranged on the side close to the furnace head.

[0005] Preferably, the water seal device includes a water tank arranged outside the furnace head. A section of the driving steel belt is arranged below the water surface of the water tank. A sealing cover is arranged between the water tank and the furnace head. One end of the sealing cover extends into the water in the water tank, and the other end is hermetically connected to the furnace door of the furnace head. The driving steel belt passes through the water tank, the sealing cover, and the furnace door in sequence and extends into the furnace chamber.

[0006] Preferably, the sealing cover is inclined, and its lower end extends into the water in the water tank.

[0007] Preferably, the driving steel belt is driven by a driving mechanism arranged on the water tank. The driving mechanism includes a roller arranged in the water tank and a motor arranged on the lower side of the water tank. The roller presses tightly against the driving steel belt from above, and the motor drives the roller to drive the driving steel belt to move.

[0008] Preferably, the cleaning device includes a cleaning tank disposed at the furnace tail. A bracket is provided on the cleaning tank, and a brush for brushing residual powder on the transmission steel belt is provided on the bracket. At least one side of the bracket along the moving direction of the transmission steel belt is provided with a cleaning pipe, and the water flowing out of the cleaning pipe cleans the transmission steel belt, and the cleaned water flows into the cleaning tank.

[0009] Preferably, rollers are provided in the cleaning tank, the transmission steel belt is wound around the rollers from the lower side in an arc shape, and both the brush and the cleaning pipe are provided at one end of the cleaning tank away from the furnace tail.

[0010] Preferably, one end of the bracket is connected to the other end of the cleaning tank close to the furnace tail, and the brush and the cleaning pipe are installed at the other end of the bracket.

[0011] Preferably, the flue gas flowing out of the flue is transported to a closed water storage tank, and the gas flowing out of the water storage tank is transported to a gas storage tank for storage.

[0012] Preferably, a flue gas pipe is connected to the bottom of the water storage tank, the flue gas in the flue enters the water storage tank through the flue gas pipe, an air delivery pipe is provided at the top of the water storage tank, and the gas in the flue gas passes through the water in the water storage tank and flows into the gas storage tank from the air delivery pipe.

[0013] As can be seen from the above technical solutions, the present utility model adopts a water seal device to seal the furnace head, ensuring that the furnace chamber is always maintained in a positive pressure state, thereby ensuring that air does not enter the furnace chamber, greatly improving the production safety; at the same time, the present utility model directly passes the discharged flue gas into water for dust removal and impurity removal, and then stores the relatively pure gas for sale or other uses, not only realizing clean production, reducing environmental pollution, but also reducing the overall production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The following Figure 1 introduces the present utility model in detail. Here, the schematic embodiments and descriptions of the present utility model are used to explain the present utility model, but not to limit the present utility model.

[0016] Such as Figure 1, the present utility model provides a steel belt reduction furnace for preparing metal powder, which includes a furnace chamber 1 and a driving steel belt 4 that penetrates into the furnace chamber from the furnace head 2 and exits from the furnace tail 3. A water seal device 6 is provided at the furnace head to seal the furnace head. A cleaning device 7 for cleaning the driving steel belt is provided at the furnace tail. The driving steel belt passes through the water seal device and enters the furnace chamber from the furnace head. The flue gas generated in the furnace chamber is discharged through a flue 5 provided on the side close to the furnace head, and the discharged flue gas is centrally collected after dust removal and impurity removal. The present utility model ensures the safe production of the reduction furnace through the water seal device, can thoroughly remove the residual powder on the driving steel belt through the cleaning device, and improves the product quality. At the same time, the generated flue gas is centrally collected, achieving the purpose of clean production.

[0017] Specifically, the water seal device 6 includes a water tank 61 provided outside the furnace head. A section of the driving steel belt is arranged below the water surface of the water tank. A sealing cover 62 is provided between the water tank and the furnace head. One end of the sealing cover extends into the water in the water tank, and the other end is hermetically connected to the furnace door 63 of the furnace head. The driving steel belt passes through the water tank, the sealing cover, and the furnace door in sequence and extends into the furnace chamber. Thus, the gap at the part where the furnace door penetrates the driving steel belt is sealed by the water seal structure formed by the sealing cover and the water tank. Even if reducing gas leaks from this gap, the gas will only leak into the sealing cover under the action of the water seal and will not communicate with the external atmospheric pressure, thereby ensuring that the furnace chamber always operates under a positive pressure state and preventing air from entering the furnace chamber.

[0018] During implementation, the sealing cover is inclined, and its lower end extends into the water in the water tank, that is, the position of the water tank is lower than the furnace head, which can not only prevent the water in the water tank from leaking, but also ensure that the water in the water tank always blocks one end of the sealing cover. Further, the driving steel belt is driven by a driving mechanism provided on the water tank to make the driving steel belt move and realize the transportation of powder. The driving mechanism includes a roller 64 provided in the water tank and a motor provided on the lower side of the water tank. The roller tightly adheres to the driving steel belt from the upper side, so that the roller is driven by the motor to drive the driving steel belt to drive by using the friction force between the two. Its installation is convenient and the structure is simple. Further, the roller is arranged below the water surface of the water tank. On the one hand, it can cool the roller and extend its service life. On the other hand, it can press the driving steel belt below the water surface of the water tank to ensure that the driving steel belt will not interfere with the sealing cover during operation and ensure that the driving steel belt maintains a good operating state.

[0019] The cleaning device 7 of the present utility model includes a cleaning tank 71 arranged at the furnace tail. A bracket 72 is provided on the cleaning tank, and a brush 73 for brushing off the residual powder on the transmission steel belt is provided on the bracket. On the bracket, at least one side of the brush along the moving direction of the transmission steel belt is provided with a cleaning pipe 74. The water flowing out of the cleaning pipe cleans the transmission steel belt, and the cleaned water flows into the cleaning tank. When only one cleaning pipe is provided, the cleaning pipe should be arranged on the front side of the brush, that is, in the moving direction of the transmission steel belt, the brush first brushes the residual powder, and then the cleaning pipe is used for cleaning. Thus, the residual powder is first loosened and brushed off by the brush, and then cleaned by the water of the cleaning pipe, and the residual powder can be cleaned more thoroughly.

[0020] During the implementation process, cleaning pipes are provided on both sides of the brush, further ensuring thorough cleaning. The brush and the cleaning pipes are arranged in a manner perpendicular to the moving direction of the transmission steel belt and close to the upper side of the transmission steel belt. The cleaning pipe uses an ordinary water pipe, and a plurality of through holes are opened thereon. The water in the cleaning pipe flows to the transmission steel belt through the plurality of through holes to achieve cleaning. A roller 75 is provided in the cleaning tank of the present utility model. The transmission steel belt is wound around the roller from the lower side in an arc shape. The setting of the roller can, on the one hand, depress the transmission steel belt to make the steel belt arc-shaped, that is, the transmission steel belt first slopes downward after passing out of the furnace and then slopes upward; on the other hand, roller friction is realized between the roller and the transmission steel belt, which is beneficial to the operation of the transmission steel belt. The brush and the cleaning pipes of the present utility model are both arranged at one end of the cleaning tank far from the furnace tail, that is, on the side where the transmission steel belt slopes upward, thereby avoiding the re-pollution of the cleaned part of the transmission steel belt by the cleaned water and further ensuring the cleanliness of the transmission steel belt. One end of the bracket of the present utility model is connected to the other end of the cleaning tank close to the furnace tail, and the other end of the bracket is installed with the brush and the cleaning pipes. This can ensure that the bracket has enough space and is convenient for the layout of the brush and the cleaning pipes.

[0021] When producing iron-nickel powder with the steel belt reduction furnace of the present utility model, since most of the generated flue gas is hydrogen, the flue gas flowing out of the flue is transported to a closed water storage tank 8 in the present utility model, so that the impurities in the flue gas precipitate or dissolve in the water, and the relatively light hydrogen is difficult to dissolve in the water and penetrates out of the water. Then, the gas flowing out of the water storage tank is transported to a gas storage tank 9 for storage, so as to be centrally collected, reduce emissions, and achieve clean production. Specifically, a flue gas pipe 81 is connected to the bottom of the water storage tank, and the flue gas in the flue enters the water storage tank through this flue gas pipe. An air delivery pipe 82 is provided at the top of the water storage tank, and the gas in the flue gas passes through the water in the water storage tank and flows into the gas storage tank from the air delivery pipe. Thus, when the flue gas passes through the water in the water tank from bottom to top, the impurities are removed more thoroughly, the cleanliness of hydrogen is improved, and the hydrogen is centrally stored and sold, which can reduce the overall production cost.

Claims

1. A steel belt reduction furnace for preparing metal powder, comprising a furnace and a transmission steel belt that passes through the furnace head and out of the furnace tail, characterized in that: The furnace head is provided with a water seal device, and the furnace tail is provided with a cleaning device for cleaning the transmission steel belt. The transmission steel belt passes through the water seal device and enters the furnace from the furnace head. The smoke generated in the furnace is discharged through a flue provided on one side close to the furnace head. After the smoke flowing out of the flue is transported to the sealed water tank, the gas flowing out of the water tank is transported to the gas tank for storage; a smoke pipe is connected to the bottom of the water tank, and the smoke in the flue enters the water tank through the smoke pipe. An air pipe is provided on the top of the water tank, and the gas in the smoke passes through the water in the water tank and flows from the air pipe into the gas tank.

2. The steel strip reduction furnace for preparing metal powder according to claim 1, characterized in that: The water sealing device includes a water tank arranged on the outside of the furnace head, a section of the transmission steel belt is arranged below the water surface of the water tank, a sealing cover is arranged between the water tank and the furnace head, one end of the sealing cover extends into the water in the water tank, and the other end is sealed and connected to the furnace door of the furnace head, and the transmission steel belt passes through the sealing cover and the furnace door in sequence from the water tank and extends into the furnace.

3. The steel strip reduction furnace for preparing metal powder according to claim 2, characterized in that: The sealing cover is arranged obliquely, and a lower end thereof extends into the water in the water tank.

4. The steel strip reduction furnace for preparing metal powder according to claim 2, characterized in that: The transmission steel belt is driven by a transmission mechanism arranged on the water tank. The transmission mechanism includes a roller arranged in the water tank and a motor arranged at the lower side of the water tank. The roller is pressed against the transmission steel belt from the upper side, and the motor drives the roller to drive the transmission steel belt.

5. The steel strip reduction furnace for preparing metal powder according to claim 1, characterized in that: The cleaning device includes a cleaning tank arranged at the tail of the furnace, on which a bracket is arranged, on which a brush for brushing off residual powder on the transmission steel belt is arranged, and on the bracket a cleaning pipe is arranged on at least one side of the brush along the moving direction of the transmission steel belt, and water flowing out of the cleaning pipe cleans the transmission steel belt, and the cleaned water flows into the cleaning tank.

6. The steel strip reduction furnace for preparing metal powder according to claim 5, characterized in that: A roller is arranged in the cleaning tank, and the transmission steel belt is wound around the roller from the lower side in an arc shape. The brush and the cleaning pipe are arranged at one end of the cleaning tank away from the furnace tail.

7. The steel strip reduction furnace for preparing metal powder according to claim 5, characterized in that: One end of the bracket is connected to the other end of the cleaning tank close to the furnace tail, and the other end of the bracket is installed with the brush and the cleaning pipe.

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