Shaft furnace device

Abstract

The utility model discloses a shaft furnace device, and relates to the field of metal smelting, the shaft furnace device comprises a shaft furnace body extending along the vertical direction, the shaft furnace body is provided with a material inlet, a finished product outlet, a gas inlet and a gas outlet, and the finished product outlet can be opened and closed; an outlet of the stock bin is connected with the material inlet through a conveying pipe, and an opening and closing mechanism is arranged on the conveying pipe; the lower portion of the stock bin is provided with a diameter reducing structure enabling materials in the stock bin to slide to an outlet of the stock bin. The material level detection unit is used for monitoring the material level of materials in the stock bin; the spraying unit is used for spraying water into the stock bin and / or the shaft furnace body; and the control unit is electrically connected with the material level detection unit and the spraying unit, and the control unit is used for controlling opening and closing of the spraying unit according to the material level condition, monitored by the material level detection unit, of the materials in the stock bin. The material suspension phenomenon of the stock bin can be solved on the basis of low cost, reliability, high efficiency and no damage to the stock bin.

Description

Technical Field

[0001] The utility model relates to the field of metal smelting, and particularly relates to a shaft furnace device. Background Art

[0002] In order to solve the problems of large investment scale and heavy pollution in the traditional blast furnace ironmaking method, since the last century, a non-blast furnace ironmaking method, namely direct reduction ironmaking method, has been developed in the world. According to the types of reducing agents, this method is divided into two categories: gas-based and coal-based. The gas-based mainly includes MIDREX, HYL, etc.; the coal-based mainly includes rotary kiln method, rotary hearth furnace method, externally heated reaction tank method, etc.

[0003] The above technologies all have their own deficiencies. The gas-based reduction technology has disadvantages such as the need for high-quality reducing gas resources as a guarantee, difficult reduction process control, high requirements for raw materials, large investment, and high operating costs; the coal-based direct reduction technology has disadvantages such as high requirements for raw materials, high energy consumption, small output, difficult reduction process control, low operation rate, and difficulty in large-scale equipment. It is precisely for the above reasons that the promotion of direct reduction is currently restricted worldwide and the total output is not large. Based on the premise of maintaining the existing production capacity unchanged, in order to better match the electric arc furnace steelmaking process with lower carbon emissions (compared with the conventional converter steelmaking process), the gas-based direct reduction method is the major trend in the industry in the future.

[0004] In a shaft furnace device adopting the gas-based direct reduction method, it includes a bin for receiving materials and a shaft furnace body, and the bin is used to continuously convey solid materials into the shaft furnace body. However, the materials in the bin may have the phenomenon of hanging materials during the downward dropping and conveying process. After that, the materials in the bin cannot continue to fall and be conveyed into the shaft furnace body. There are various different ways in the prior art to solve the hanging material phenomenon of the bin. For example, there is an anti-hanging material bin, which includes a bin, anti-caking devices, a vibration frame, and a vibration motor. The anti-caking devices are arranged at intervals on the inner walls on both sides of the bin, and the anti-caking devices on both sides are arranged alternately in height; the vibration frames are arranged at intervals on the outside of the bin, and a connecting body is connected between the vibration frame and the outer wall of the bin. The connecting body corresponds to the anti-caking devices, and the vibration motor is fixed on the vibration frame. This bin sets vibration points specifically through the vibration frame and the connecting body, and corresponding anti-caking devices are set at each vibration point, and the layout positions of the anti-caking devices are planned to form an asymmetric structure inside the bin, reducing the probability of material wall sticking. When a hanging material structure is formed, one side of the hanging material structure will probably occupy the anti-caking device, and the anti-caking device can be in a vibrating state, so that the hanging material structure can be quickly eliminated to ensure the normal feeding of the bin. Summary of the Utility Model

[0005] In view of the above-mentioned prior art, the applicant has found in actual production that due to material hanging in the silo, although the continuous vibration of the vibration motor can prevent material accumulation, the continuous high-frequency vibration of the vibration motor will deteriorate the silo structure. Over time, it is found that some parts of the silo structure at the vibration point of the vibration motor have been deformed or slightly damaged to varying degrees. If this continues, the degree of damage will deepen further over time until breakage may occur. In addition, when material hanging occurs in the silo, the start of the vibration motor will cause the material to move irregularly in small amplitudes in the silo. At this time, due to the anti-caking setting, the material will randomly collide with the anti-caking device, which increases the pulverization rate of the material and is not conducive to the next process.

[0006] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiment of the present utility model is to provide a shaft furnace device, which can solve the problem of material hanging in the silo on the basis of low cost, reliable and efficient operation, and without damaging the silo.

[0007] The specific technical solution of the embodiment of the present utility model is as follows:

[0008] A shaft furnace device, the shaft furnace device includes:

[0009] A shaft furnace body extending in the vertical direction, the shaft furnace body is provided with a material inlet, a finished product outlet, a gas inlet and a gas outlet, and the finished product outlet can be opened and closed;

[0010] A silo for storing materials, the outlet of the silo is connected to the material inlet through a conveying pipe, and the conveying pipe is provided with an opening and closing mechanism; the lower part of the silo has a reduced-diameter structure to make the materials in the silo slide down to the outlet of the silo;

[0011] A material level detection unit for monitoring the material level in the silo;

[0012] A spraying unit for spraying water into the silo and / or the shaft furnace body;

[0013] A control unit, the control unit is electrically connected to the material level detection unit and the spraying unit, and the control unit is used to control the opening and closing of the spraying unit according to the material level situation in the silo monitored by the material level detection unit.

[0014] Preferably, the material level detection unit at least includes one of the following: a capacitive level gauge inserted into the silo, a camera device for monitoring the material surface in the silo.

[0015] Preferably, at least part of the spraying unit is arranged in the silo, or at least part of the spraying unit is arranged in the shaft furnace body.

[0016] Preferably, the spraying unit includes: a water delivery pipeline; a plurality of spray nozzles sequentially arranged on the water delivery pipeline along the extension direction of the water delivery pipeline; a on-off valve arranged on the water delivery pipeline and located upstream of the spray nozzles; at least part of the pipeline and the plurality of spray nozzles are located in the silo or the shaft furnace body.

[0017] Preferably, there are two spraying units, and the two spraying units extend horizontally; the two spraying units are respectively located at the opposite side walls close to the silo or the shaft furnace body.

[0018] Preferably, the shaft furnace device has a state of removing hanging materials. In the state of removing hanging materials, the finished product outlet is in a closed state, the opening and closing mechanism on the conveying pipe is in an open state, the gas inlet and the gas outlet are in a non-connected state, and the spraying unit is in an open state.

[0019] Preferably, the shaft furnace device includes:

[0020] A finished product storage unit, which can be communicated with the finished product outlet of the shaft furnace body.

[0021] Preferably, the finished product storage unit is connected to the finished product outlet of the shaft furnace body through a pipe body, and a flap valve is arranged on the pipe body.

[0022] Preferably, the gas inlet is connected with an opening and closing valve, the gas outlet is connected with an opening and closing valve, and the opening and closing valves of the gas inlet and the gas outlet are both electrically connected to the control unit.

[0023] Preferably, when at least part of the spraying unit is arranged in the shaft furnace body, the water delivery pipeline and the plurality of spray nozzles are arranged in the upper middle part or the upper part of the shaft furnace body.

[0024] The technical solution of the present utility model has the following remarkable beneficial effects:

[0025] 1. In dealing with the problem of hanging materials in the shaft furnace device, this application does not need to deal with the hanging material problem after the furnace is stopped, nor does it need to use gases such as nitrogen to replace the reducing atmosphere in the furnace, and it will not cause huge pressure fluctuations in the shaft furnace body.

[0026] 2. This application can be operated without reducing the pressure in the furnace in advance and without recovering the gas in the furnace, reducing the operation cost, reducing the operation steps, avoiding large fluctuations in the furnace pressure, and not affecting the continuous progress of the reduction reaction in the furnace.

[0027] 3. If the spraying unit is damaged, it can be replaced separately, and the maintenance cost is low.

[0028] Specific embodiments of the present utility model are disclosed in detail with reference to the following descriptions and drawings, indicating the ways in which the principles of the present utility model can be adopted. It should be understood that the embodiments of the present utility model are not limited thereby in scope. Features described and / or illustrated for one embodiment can be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or replace features in other embodiments. Brief Description of the Drawings

[0029] The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the disclosure of the present utility model in any way. Additionally, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to assist in understanding the present utility model, rather than specifically defining the shapes and proportional dimensions of the components of the present utility model. Those skilled in the art can, under the teachings of the present utility model, select various possible shapes and proportional dimensions according to specific circumstances to implement the present utility model.

[0030] Figure 1 It is a schematic structural diagram of the shaft furnace device in an embodiment of the present utility model;

[0031] Figure 2 It is a schematic structural diagram of the spraying unit in the silo or the shaft furnace body in an embodiment of the present utility model.

[0032] Reference numerals of the above drawings:

[0033] 1, silo; 11, reduced diameter structure; 2, shaft furnace body; 21, material inlet; 22, finished product outlet; 23, gas inlet; 24, gas outlet; 3, conveying pipe; 4, opening and closing mechanism; 5, material level detection unit; 51, camera device; 52, capacitance type level gauge; 6, spraying unit; 61, water conveying pipeline; 62, nozzle; 63, on-off valve; 7, pipe body; 71, knife gate valve; 8, finished product storage unit; 9, material. Specific Embodiments

[0034] Combined with the description of the accompanying drawings and the specific embodiments of the present invention, the details of the present invention can be more clearly understood. However, the specific embodiments of the present invention described herein are only for the purpose of explaining the present invention and cannot be construed in any way as a limitation of the present invention. Under the teaching of the present invention, those skilled in the art can conceive any possible variations based on the present invention, and these should all be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the communication inside two elements. It can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0036] In order to solve the problem of hanging material in the silo on the basis of low cost, reliable and efficient operation without damaging the silo, a shaft furnace device is proposed in this application. Figure 1 It is a schematic structural diagram of the shaft furnace device in the embodiment of the present invention. Figure 2 It is a schematic structural diagram of the spray unit in the silo or the shaft furnace body in the embodiment of the present invention. As Figure 1 and Figure 2 shown, the shaft furnace device may include: a shaft furnace body 2, a silo 1, a material level detection unit 5, a spray unit 6, and a control unit.

[0037] Among them, the shaft furnace body 2 extends in the vertical direction. The shaft furnace body 2 is provided with a material inlet 21, a finished product outlet 22, a gas inlet 23, and a gas outlet 24. The finished product outlet 22 can be opened and closed. The material inlet 21 of the shaft furnace body 2 is located on the upper end face and can be located in the middle of the upper end face. The finished product outlet 22 of the shaft furnace body 2 is located on the lower end face and can be located in the middle of the lower end face.

[0038] The gas inlet 23 is used to input a reducing gas that can match the reaction with the material 9 into the shaft furnace body 2. The gas outlet 24 is used to discharge the excess reducing gas and other gases generated by the reaction in the shaft furnace body 2. The gas inlet 23 and the gas outlet 24 can be located on the side wall of the shaft furnace body 2, which is conducive to the mixing of the input gas and the material 9, so as to improve the reaction rate and the degree of reaction. Further, the height of the gas inlet 23 is lower than the height of the gas outlet 24, and the reducing gas entering the gas inlet 23 can flow upward, thereby increasing the degree of contact with the material 9 and helping to improve the reaction rate and the degree of reaction.

[0039] The bin 1 is used to store the material 9. The outlet of the bin 1 is connected to the material inlet 21 through the conveying pipe 3. The conveying pipe 3 is provided with an opening and closing mechanism 4, and the connection or disconnection between the outlet of the bin 1 and the shaft furnace body 2 can be controlled through the opening and closing mechanism 4. The lower part of the bin 1 has a reduced-diameter structure 11 for making the material 9 in the bin 1 slide down to the outlet of the bin 1, so that the material 9 in the bin 1 can continuously slide down to the outlet of the bin 1 under the action of gravity. The opening and closing mechanism 4 can be a plug valve 71 arranged on the conveying pipe 3, or other types of mechanisms that can control the on-off of the conveying pipe 3.

[0040] The material level detection unit 5 is used to monitor the material level of the material 9 in the bin 1. The material level detection unit 5 includes at least one of the following: a capacitive level gauge 52 inserted into the bin 1, and a camera device 51 for monitoring the material surface of the material 9 in the bin 1. The capacitive level gauge 52 can be in contact with the material 9 in the bin 1, and the material level of the material 9 in the bin 1 can be monitored through contact monitoring. The camera device 51 can not be in any contact with the material 9 in the bin 1, and can be set at a distance, and the material level of the material 9 in the bin 1 can be monitored through images to check whether it drops. The material level detection unit 5 can combine the capacitive level gauge 52 and the camera device 51 to ensure the accuracy of monitoring whether the material level of the material 9 drops.

[0041] As feasible, the camera device 51 can be located above the bin 1, and the shooting angle of the camera device 51 is directed towards the material 9 in the bin 1.

[0042] The spraying unit 6 is used to spray water into the bin 1 and / or the shaft furnace body 2. As feasible, at least part of the spraying unit 6 can be arranged in the bin 1; and / or, at least part of the spraying unit 6 can be arranged in the shaft furnace body 2.

[0043] As Figure 2As shown, the spraying unit 6 may include: a water delivery pipeline 61; a plurality of spray nozzles 62 sequentially arranged on the water delivery pipeline 61 along the extension direction of the water delivery pipeline 61; a on-off valve 63 arranged on the water delivery pipeline 61 and upstream of the spray nozzles 62; at least part of the pipeline and the plurality of spray nozzles 62 are located in the silo 1 or the shaft furnace body 2. By controlling the on-off of the on-off valve 63, it is possible to control whether to spray water into the silo 1 and / or the shaft furnace body 2.

[0044] The control unit may be electrically connected to the material level detection unit 5 and the spraying unit 6. The control unit is used to control the opening and closing of the spraying unit 6 according to the material level condition of the material 9 in the silo 1 monitored by the material level detection unit 5. When the shaft furnace body 2 feeds materials through the silo 1, the problem of hanging materials may occur at the outlet of the conveying pipe 3 and the silo 1. At this time, the shaft furnace body 2 cannot continue to feed materials. When the above situation occurs, the control unit can control the spraying unit 6 to open when the material level of the material 9 in the silo 1 monitored by the material level detection unit 5 does not change for a preset time, and spray water into the silo 1 and / or the shaft furnace body 2 through the spraying unit 6. When the spraying unit 6 sprays water into the silo 1, the sprayed water falls into the silo 1, not only cooling the material 9 in the silo 1, but also reducing the temperature of the gas in the shaft furnace body 2 through heat conduction. In addition, some excess water may also drip down into the shaft furnace body 2. The above various factors cause the gas in the shaft furnace body 2 to contract due to the temperature drop, thereby generating a suction force. The suction force can suck the hanging materials that appear at the outlet of the conveying pipe 3 or the silo 1, and suck the material 9 downward into the shaft furnace body 2. Through the above process, the problem of hanging materials is solved, ensuring the normal operation of the shaft furnace device. When the spraying unit 6 sprays water into the shaft furnace body 2, the sprayed water directly enters the shaft furnace body 2 to reduce the temperature of the gas in the shaft furnace body 2, resulting in the gas in the shaft furnace body 2 contracting due to the temperature drop, thereby generating a suction force. The suction force can suck the hanging materials that appear at the outlet of the conveying pipe 3 or the silo 1.

[0045] When the spraying unit 6 sprays water into the shaft furnace body 2, as a feasible solution, the water delivery pipeline 61 and the plurality of spray nozzles 62 in the spraying unit 6 can be arranged in the upper middle or upper part of the shaft furnace body 2, so that the water sprayed by the spraying unit 6 can cover more areas in the shaft furnace body 2 in the vertical direction, thereby improving the effect of reducing the temperature of the gas in the shaft furnace body 2 and making the shaft furnace body 2 generate a greater suction force.

[0046] In order to make the water sprayed by the spraying unit 6 relatively uniform on the horizontal cross-section of the shaft furnace body 2, avoiding too much water on one side and too little water on the other side locally, resulting in too large a temperature drop difference at different positions in the shaft furnace body 2. As a feasible solution, such as Figure 2As shown, there can be two spray units 6, and the two spray units 6 extend in the horizontal direction. The two spray units 6 are respectively located at the opposite side walls close to the silo 1 or the shaft furnace body 2.

[0047] The shaft furnace device can have a state of removing hanging materials. In the state of removing hanging materials, the finished product outlet 22 is in a closed state, the opening and closing mechanism 4 on the conveying pipe 3 is in an open state, the gas inlet 23 and the gas outlet 24 are in a non-connected state, and the spray unit 6 is in an open state. In the above way, the shaft furnace body 2 of the shaft furnace device can generate a stronger suction force in the state of removing hanging materials.

[0048] To achieve the above purpose, an on-off valve is connected to the gas inlet 23, an on-off valve is connected to the gas outlet 24, and the on-off valves of the gas inlet 23 and the gas outlet 24 are both electrically connected to the control unit. The control unit is used to control the shaft furnace device to enter the state of removing hanging materials when the material level of the material 9 in the silo 1 monitored by the material level detection unit 5 does not change for a preset time.

[0049] In the state of removing hanging materials, the spray unit 6 sprays water into the silo 1, so that the temperature of the material 9 in the silo 1 drops, and then the temperature of the gas in the shaft furnace body 2 drops, and the gas in the shaft furnace body 2 shrinks to open up the descending channel of the material 9 in the conveying pipe 3.

[0050] The shaft furnace device can include: a finished product storage unit 8, which is connected to the finished product outlet 22 of the shaft furnace body 2. The finished product storage unit 8 can be a tank. The finished product storage unit 8 and the finished product outlet 22 of the shaft furnace body 2 can be connected through a pipe body 7. An insertion plate valve 71 can be arranged on the pipe body 7 to realize the opening and closing of the finished product outlet 22 of the shaft furnace body 2. The material 9 enters the shaft furnace body 2 from the silo 1, and after sufficient reduction reaction with the reducing gas in the shaft furnace body 2, it is discharged from the finished product outlet 22 of the shaft furnace body 2 and enters the finished product storage unit 8.

[0051] In this application, a control method for a shaft furnace device is also proposed. This control method can be applied to any of the above shaft furnace devices, or to other feasible shaft furnace devices.

[0052] The control method can include the following steps:

[0053] When the shaft furnace body 2 is feeding through the silo 1, the material level detection unit 5 monitors the material level of the material 9 in the silo 1.

[0054] In this step, when the shaft furnace body 2 is feeding through the silo 1, the finished product outlet 22 is closed, and the opening and closing mechanism 4 on the conveying pipe 3 is opened; the material 9 in the silo 1 is continuously conveyed into the shaft furnace body 2 through the conveying pipe 3 and the material inlet 21 of the shaft furnace body 2.

[0055] When the material level of the material 9 in the silo 1 remains unchanged for a preset time, the spraying unit 6 is controlled to start.

[0056] In this step, when the shaft furnace body 2 is fed through the silo 1, the material level of the material 9 in the silo 1 is monitored by the material level detection unit 5. When the material level of the material 9 in the silo 1 remains unchanged for a preset time, it can be judged that a hanging material has occurred at the outlet of the conveying pipe 3 or the silo 1. At this time, the spraying unit 6 is controlled to start. The spraying unit 6 sprays water into the silo 1 and / or the shaft furnace body 2, causing the gas in the shaft furnace body 2 to contract due to temperature drop, thereby generating a suction force. The suction force can suck the hanging material at the outlet of the opened conveying pipe 3 or the silo 1, and suck the material 9 downward into the shaft furnace body 2. Through the above process, the problem of hanging material is solved, ensuring the normal operation of the shaft furnace device.

[0057] Furthermore, when the material level of the material 9 in the silo 1 remains unchanged for a preset time, after controlling the gas inlet 23 and the gas outlet 24 to be in a non-connected state, the spraying unit 6 is then started. Through the above steps, a stronger suction force can be generated in the shaft furnace body 2 of the shaft furnace device, thereby solving the problem of hanging material.

[0058] The shaft furnace body 2 is fed through the silo 1 until the shaft furnace body 2 is filled with the material 9.

[0059] The reducing gas is input from the gas inlet 23 of the shaft furnace body 2 and moves upward. After reacting with the material 9 in the shaft furnace body 2, it is discharged from the gas outlet 24 of the shaft furnace body 2. The input of the reducing gas can be after the shaft furnace body 2 is filled with the material 9, or when the shaft furnace body 2 is filled with the material 9, which can accelerate the reaction progress.

[0060] The shaft furnace device and its control method in this application can have the following advantages:

[0061] First, in dealing with the problem of hanging material in the shaft furnace device, this application does not need to deal with the hanging material problem after stopping the furnace, nor does it need to use gases such as nitrogen to replace the reducing atmosphere in the furnace, and it will not cause huge pressure fluctuations in the shaft furnace body 2.

[0062] Second, the height of the material 9 in the silo 1 can be monitored by combining two means: an electrically automated capacitance type level gauge 52 and a visual camera device 51. The dual means can quickly and accurately determine the occurrence of hanging material in the shaft furnace device.

[0063] Third, this application can be operated without pre-reducing the pressure in the furnace and without recovering the gas in the furnace, reducing the operation cost, reducing the operation steps, avoiding large pressure fluctuations in the furnace, and not affecting the continuation of the reduction reaction in the furnace.

[0064] Fourthly, if the spraying unit 6 is damaged, it can be replaced separately with low maintenance costs.

[0065] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of" describing a combination shall include the identified elements, components, parts or steps and other elements, components, parts or steps that do not materially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combinations of elements, components, parts or steps herein also contemplates embodiments consisting essentially of these elements, components, parts or steps. By using the term "may" herein, it is intended that any attribute described as "may" include is optional. A plurality of elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step can be separated into a plurality of separate elements, components, parts or steps. The disclosure of "a" or "an" used to describe an element, component, part or step does not mean to exclude other elements, components, parts or steps.

[0066] Each embodiment in this specification is described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other. The above embodiments are only for illustrating the technical concept and characteristics of the present invention, and the purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. It cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention shall be covered within the protection scope of the present invention.

Claims

1. A shaft furnace device, characterized in that, The shaft furnace device includes: A shaft furnace body extending in the vertical direction, with a material inlet, a finished product outlet, a gas inlet, and a gas outlet on the shaft furnace body, and the finished product outlet can be opened and closed; A bin for storing materials, the outlet of the bin is connected to the material inlet through a conveying pipe, and an opening and closing mechanism is provided on the conveying pipe; the lower part of the bin has a reduced-diameter structure to cause the materials in the bin to slide towards the outlet of the bin; A level detection unit for monitoring the material level in the bin; A spraying unit for spraying water into the bin and / or the shaft furnace body; A control unit, the control unit is electrically connected to the level detection unit and the spraying unit, and the control unit is used to control the opening and closing of the spraying unit according to the material level situation in the bin monitored by the level detection unit.

2. The shaft furnace device according to claim 1, characterized in that, The level detection unit includes at least one of the following: a capacitive level gauge inserted into the bin, and a camera device for monitoring the material surface in the bin.

3. The shaft furnace device according to claim 1, characterized in that, At least part of the spraying unit is arranged in the bin, or at least part of the spraying unit is arranged in the shaft furnace body.

4. The shaft furnace device according to claim 3, characterized in that, The spraying unit includes: a water delivery pipe; a plurality of nozzles arranged in sequence on the water delivery pipe along the extension direction of the water delivery pipe; a on-off valve arranged on the water delivery pipe and upstream of the nozzles; at least part of the pipe and the plurality of nozzles are located in the bin or the shaft furnace body.

5. The shaft furnace device according to claim 4, characterized in that, There are two spraying units, and the two spraying units extend in the horizontal direction; the two spraying units are respectively located near the opposite side walls of the bin or the shaft furnace body.

6. The shaft furnace device according to claim 1, characterized in that, The shaft furnace device has a state of removing hanging materials. In the state of removing hanging materials, the finished product outlet is in a closed state, the opening and closing mechanism on the conveying pipe is in an open state, the gas inlet and the gas outlet are in a non-connected state, and the spraying unit is in an open state.

7. The shaft furnace device according to claim 6, characterized in that, The shaft furnace device includes: A finished product storage unit, which can be connected to the finished product outlet of the shaft furnace body.

8. The shaft furnace device according to claim 7, characterized in that The finished product storage unit is connected to the finished product outlet of the shaft furnace body through a pipe body, and a knife gate valve is arranged on the pipe body.

9. The shaft furnace device according to claim 6, characterized in that, The gas inlet is connected with an opening and closing valve, and the gas outlet is connected with an opening and closing valve. The opening and closing valves of the gas inlet and the opening and closing valves of the gas outlet are both electrically connected to the control unit.

10. The shaft furnace device according to claim 4, characterized in that, When at least part of the spraying unit is arranged in the shaft furnace body, the water delivery pipe and the plurality of nozzles are arranged in the upper middle part or the upper part of the shaft furnace body.

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