Dispersion coating system for ore feedstock in gas-based shaft furnace

Abstract

The utility model relates to a kind of ore raw material dispersion coating system for gas-based shaft furnace, belong to gas-based shaft furnace direct reduction ironmaking technical field. Including multiple parallel coating units, through multiple sets of coating unit to ore raw material is dispersed coating, and using weight loss scale, flowmeter, metering pump, quantitative belt feeder and other equipment to coating liquid proportioning, coating amount are controlled, using quantitative belt feeder, weighing hopper to ore raw material is laid and mixed, using industrial water to flush coating system, simultaneously with ore raw material storehouse equipment integration, can effectively improve the coating effect and coating efficiency of ore raw material, realize the accurate adjustment of coating liquid proportioning and coating amount, avoid dispersion coating system pipeline blockage, reduce engineering construction investment and production operation cost.

Description

Technical Field

[0001] This utility model belongs to the field of direct reduction ironmaking technology in gas-based vertical shaft furnaces, and relates to an ore raw material dispersion coating system for gas-based vertical shaft furnaces. Background Technology

[0002] Gas-based shaft furnace direct reduction ironmaking technology is a non-blast furnace ironmaking technology with advantages such as energy saving, high efficiency, low carbon emissions, and environmental protection, and has become an important development direction in the iron and steel metallurgy industry in recent years. Gas-based shaft furnaces mainly use pellets and lump ore as raw materials. After the ore is charged into the furnace from the top, it moves downwards under gravity, simultaneously coming into countercurrent contact with the upward-flowing high-temperature reducing gas, and is gradually heated and reduced to direct reduced iron. During the high-temperature reduction process, elemental iron precipitates and iron whiskers form on the surface of the charge. Due to physical adhesion and the diffusion of iron atoms on the charge surface promoting sintering between the iron whiskers, the charge exhibits adhesion and flow loss, severely affecting the smooth operation of the gas-based shaft furnace and reducing its productivity.

[0003] To prevent the diffusion of iron atoms on the surface of the furnace charge, alkaline earth metal oxides can be used to coat the ore raw materials. This alters the phase composition of the precipitated elemental iron on the charge surface, thereby inhibiting agglomeration and preventing loss of flow during high-temperature reduction. Therefore, in production practice, a coating process is typically implemented before the ore raw materials are fed into the furnace. The coating material (lime or cement) and water are thoroughly mixed in a specific ratio to form a slurry, which is then applied to the surface of the ore raw materials. Taking lime as an example, quicklime powder (calcium oxide) is thoroughly mixed with water in a specific ratio to react and produce slaked lime (calcium hydroxide), which is then coated onto the surface of the ore raw materials. During the high-temperature reduction process in the furnace, calcium hydroxide decomposes into calcium oxide and water. The calcium oxide remaining on the surface of the charge effectively inhibits agglomeration.

[0004] In current domestic and international common ore coating processes, centralized coating is typically employed. This involves installing a centralized coating facility above the belt conveyor where the ore enters the shaft furnace or silo, coating the transported ore. The centralized coating facility mainly consists of a coating silo, a feeder, a loss-in-weight weighing device, and a mixing tank. Above the coating silo are pneumatic conveying pipes and a single dust collector. The coating material is transported via suction and discharge tank trucks and then conveyed to the coating silo for storage through the pneumatic conveying pipes. Below the coating silo is a feeder used to replenish the coating material to the loss-in-weight weighing device. The loss-in-weight weighing device discharges the coating material into the mixing tank according to a set flow rate and weight, controlling the slurry ratio. The mixing tank is equipped with an agitator and a water inlet pipe. The agitator stirs the slurry to prevent sedimentation and caking; the water inlet pipe has valves and a flow meter to quantitatively add industrial water, also controlling the slurry ratio. Coating typically employs two methods: overflow and spraying. In the overflow method, an overflow trough is installed in the mixing tank, allowing the coating slurry to overflow onto the surface of the ore. The spraying method involves setting up a booster pump and atomizing nozzles. The coating slurry is pressurized by the booster pump and atomized by the nozzles before being sprayed onto the surface of the ore raw material.

[0005] The above-mentioned ore coating process has the following shortcomings: 1. In order to control the unit coating amount of ore raw materials, centralized coating facilities need to be equipped with belt scales and frequency conversion speed regulation functions on the belt conveyor below, or a separate quantitative belt feeder is required to control the flow rate and weight of ore raw materials passing through the coating facilities, which increases the investment in engineering construction.

[0006] 2. The belt conveyor below the centralized coating facility is usually used to feed materials into the ore raw material bin or to feed materials to the top of the vertical furnace. Such belt conveyors often have large conveying capacity, high belt speed and thick material layer, which leads to uneven coating of ore raw materials and poor coating effect.

[0007] 3. For coating using the overflow method, since the coating slurry flows naturally into the ore raw material, there is a lack of means to measure the amount of overflow slurry, making it difficult to accurately control the amount of coating on the ore raw material.

[0008] 4. For coatings applied by spraying, since the coating slurry such as lime or cement is a highly alkaline suspension, it can cause corrosion and blockage if left to stand in pipes, pumps, valves, and nozzles. Utility Model Content

[0009] In view of this, the purpose of this utility model is to provide an ore raw material dispersion coating system for gas-based vertical shaft furnace, which disperses and coats ore raw materials, and adjusts the coating liquid ratio and coating amount to improve the coating effect and coating efficiency of ore raw materials. Pipe flushing can also prevent the coating system pipeline from being blocked.

[0010] To achieve the above objectives, this utility model provides the following technical solution: A dispersion coating system for ore raw materials in a gas-based vertical shaft furnace includes several ore raw material bins arranged in parallel. Each ore raw material bin has a corresponding coating unit at its outlet. The several coating units are connected to a coating liquid tank and an industrial water tank respectively through a water outlet main pipe. The ends of the several coating units away from the industrial water tank are connected to the same flushing main pipe through a flushing branch. It also includes a coating material silo and a loss-in-weight scale installed at the outlet of the coating material silo, wherein the outlet end of the loss-in-weight scale is connected to the inlet end of the coating liquid tank; The loss-in-weight scale, through feedback control, can replenish the coating material into the coating liquid tank according to the set flow rate and weight. Each of the coating units includes a first flow meter and a variable frequency metering pump located at the outlet end. The variable frequency metering pump is controlled by feedback through variable frequency speed regulation based on the measured value of the first flow meter, thereby realizing the regulation and control of the output coating liquid flow rate. Each coating unit is equipped with a quantitative belt feeder at its outlet end. The quantitative belt feeder is controlled by feedback and can discharge ore raw materials according to the set flow rate and weight.

[0011] Optionally, each coating unit has a coating branch at one end away from the coating liquid tank, and a coating valve is provided on the coating branch.

[0012] Optionally, each of the ore raw material bins is provided with a first discharge gate at the bottom, and the quantitative belt feeder is correspondingly arranged below the first discharge gate; the coating material bin is provided with a second discharge gate and a coating material feeder at the bottom; the loss-in-weight scale is correspondingly arranged below the coating material feeder.

[0013] Optionally, the bottom of the industrial water tank is provided with a first drain valve for draining industrial water; the bottom of the coating liquid tank is provided with a second drain valve and a screw feeder to discharge the coating material sediment in the coating liquid tank.

[0014] Optionally, the inlet of the industrial water tank is provided with a first inlet valve, and the inlet of the coating liquid tank is provided with a second inlet valve. The first inlet valve and the second inlet valve respectively supply industrial water to the industrial water tank and the coating liquid tank. The industrial water tank is provided with a first outlet valve at the end near the main outlet pipe, and the coating liquid tank is provided with a second outlet valve at the end near the main outlet pipe.

[0015] Optionally, the coating liquid tank is also equipped with a stirrer.

[0016] Optionally, each of the quantitative belt feeders is provided with a weighing hopper at its discharge end, and a coating liquid recovery tank is connected below each weighing hopper. The discharge end of the weighing hopper is provided with a weighing hopper feeder and a feeding belt machine.

[0017] Optionally, each of the weighing hoppers is equipped with a weighing sensor. When a batch of ore raw materials is loaded into the weighing hopper according to the set weight, the quantitative belt feeder stops feeding. When a furnace top charging command is received, the weighing hopper feeder is opened to discharge the ore raw materials in the weighing hopper to the feeding belt conveyor, and then to the furnace top charging system of the vertical furnace.

[0018] Optionally, the quantitative belt feeder uses a horizontal conveyor belt with corrugated sidewalls on both sides.

[0019] Optionally, a flushing valve is provided on the flushing branch.

[0020] The beneficial effects of this utility model are as follows: This invention's coating system can be widely applied to direct reduction ironmaking in gas-based shaft furnaces. By dispersing and coating the ore raw materials, it uses equipment such as loss-in-weight scales, flow meters, metering pumps, and quantitative belt feeders to control the coating solution ratio and coating amount. The quantitative belt feeder and weighing hopper are used to evenly spread and mix the ore raw materials. Industrial water is used to rinse the coating system. Furthermore, integrating the dispersion coating system with the ore raw material silo equipment effectively improves the coating effect and efficiency, allows for accurate adjustment of the coating solution ratio and coating amount, avoids pipe blockage in the dispersion coating system, and reduces engineering construction investment and production operating costs. Specific technical effects are as follows: (1) A flow meter and a variable frequency metering pump are installed on the coating pipeline. Based on the flow meter reading, feedback control is carried out through variable frequency speed regulation, which can realize accurate control of the flow rate of the coating liquid. It can also be coordinated with the flow rate of the ore raw material of the quantitative belt feeder to accurately adjust the coating amount per unit weight of ore raw material, avoiding the problem of lack of metering and control means for coating methods such as overflow and spraying.

[0021] (2) By using multiple coating units in parallel, the ore raw materials can be coated in a dispersed manner. Multiple coating units can work simultaneously, which greatly reduces the flow rate of ore raw materials passing through each coating unit. This results in a lower velocity and thinner layer of coated ore raw materials, which can significantly improve the coating effect of ore raw materials. Using multiple coating units can also reduce the working capacity of coating equipment (variable frequency metering pump, quantitative belt feeder, etc.), thereby reducing the investment in engineering construction and production operation costs.

[0022] (3) Multiple coating units can share a coating liquid preparation device (coating silo, loss-in-weight weighing device, coating liquid tank, etc.), and the coating silo and its equipment can be combined with the ore raw material silo, which can reduce the land occupation and reduce the investment in engineering construction.

[0023] (4) The ore raw material dispersion coating system is equipped with a flushing function. Without adding additional equipment, the existing metering pump of the coating system is used to pump industrial water to replace and flush the coating system pipeline, so as to avoid corrosion, blockage and other problems in the coating system pipeline, valves and equipment.

[0024] (5) After coating, the ore raw material falls into the weighing hopper for storage and weighing, which can play a certain role in mixing and improve the coating effect of the ore raw material; the weighing signal is linked with the quantitative belt feeder, which can realize the weighing error correction function; when the coated ore raw material is left to stand in the weighing hopper, excess water can be discharged; the weighing hopper can prepare materials in advance, and when the control unit at the top of the furnace issues the charging command, each weighing hopper can immediately discharge materials to the feeding belt, which improves the material feeding capacity of the system.

[0025] (6) The dispersed coating units, ore raw material silos and their quantitative feeding equipment can be integrated into one unit to simultaneously complete the quantitative feeding and coating of ore raw materials, thereby reducing the investment in engineering construction and production operation costs.

[0026] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a schematic diagram of the overall design of this utility model.

[0028] Figure label: 1. Ore raw material bin; 2. Flushing valve; 3. First flow meter; 4. Variable frequency metering pump; 5. Coating valve; 6. Weighing hopper; 7. Weighing hopper feeder; 8. Feeding belt conveyor; 9. Coating liquid recovery tank; 10. Quantitative belt feeder; 11. First discharge gate; 12. Coating material bin; 13. Second discharge gate; 14. Coating material feeder; 15. Loss-in-weight scale; 16. First water outlet valve; 17. Industrial water tank; 18. First water inlet valve; 19. First drain valve; 20. Second flow meter; 21. Screw feeder; 22. Second drain valve; 23. Second water outlet valve; 24. Coating liquid tank; 25. Agitator; 26. Second water inlet valve. Detailed Implementation

[0029] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0031] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0032] Please see Figure 1 This is a dispersion coating system for ore raw materials used in a gas-based vertical shaft furnace. It includes several ore raw material bins 1 arranged in parallel. Each ore raw material bin 1 has a corresponding coating unit at its outlet. Several coating units are connected to a coating liquid tank 24 and an industrial water tank 17 respectively through a water outlet main pipe. The ends of several coating units away from the industrial water tank 17 are connected to the same flushing main pipe through a flushing branch. A flushing valve 2 is provided on the flushing branch.

[0033] The coating system of this utility model also includes a coating material hopper 12 and a loss-in-weight scale 15 installed at the outlet of the coating material hopper 12. The outlet end of the loss-in-weight scale 15 is connected to the inlet end of the coating liquid tank 24. The loss-in-weight scale can replenish the coating material into the coating liquid tank 24 according to the set flow rate and weight through feedback control.

[0034] Each coating unit includes a first flow meter 3 and a variable frequency metering pump 4 located at the outlet. The variable frequency metering pump 4 uses the measured value from the first flow meter 3 for feedback control via variable frequency speed regulation to adjust the output flow rate of the coating liquid. Each coating unit has a corresponding quantitative belt feeder 10 at its outlet. The quantitative belt feeder 10, through feedback control, can discharge ore raw materials according to a set flow rate and weight. Each coating unit has a coating branch at the end furthest from the coating liquid tank 24, and a coating valve 5 is installed on the coating branch. A stirrer 25 is also installed inside the coating liquid tank 24.

[0035] Furthermore, each ore raw material bin 1 is provided with a first discharge gate 11 at the bottom, and a quantitative belt feeder 10 is correspondingly set below the first discharge gate 11; the bottom of the coating material bin 12 is provided with a second discharge gate 13 and a coating material feeder 14; and a loss-in-weight scale 15 is correspondingly set below the coating material feeder 14.

[0036] Each quantitative belt feeder 10 is equipped with a weighing hopper 6 at its discharge end, and a coating liquid recovery tank 9 is connected below each weighing hopper 6. The discharge end of the weighing hopper 6 is equipped with a weighing hopper feeder 7 and a feeding conveyor belt 8. In some embodiments of this utility model, the quantitative belt feeder 10 adopts a horizontal conveyor belt with corrugated sidewalls on both sides.

[0037] Each weighing hopper 6 is equipped with a weighing sensor. When a batch of ore raw materials is loaded into the weighing hopper 6 according to the set weight, the quantitative belt feeder 10 stops feeding. When a furnace top charging command is received, the weighing hopper feeder 7 is opened to discharge the ore raw materials in the weighing hopper 6 to the feeding belt conveyor 8.

[0038] Furthermore, the industrial water tank 17 is equipped with a first drain valve 19 at the bottom for draining industrial water; the coating liquid tank 24 is equipped with a second drain valve 22 and a screw feeder 21 at the bottom to discharge the coating material sediment in the coating liquid tank 24. The inlet of the industrial water tank 17 is equipped with a first inlet valve 18, and the inlet of the coating liquid tank 24 is equipped with a second inlet valve 26. The first inlet valve 18 and the second inlet valve 26 supply industrial water to the industrial water tank 17 and the coating liquid tank 24 respectively; the end of the industrial water tank 17 near the main outlet pipe is equipped with a first outlet valve 16, and the end of the coating liquid tank 24 near the main outlet pipe is equipped with a second outlet valve 23.

[0039] The present invention is implemented in the following manner: The coating material stored in the coating material silo 12 enters the loss-in-weight scale 15 through the second discharge gate 13 and the coating material feeder 14. The loss-in-weight scale 15, through feedback control, can replenish the coating material into the coating liquid tank 24 according to the set flow rate and weight. The water inlet pipe of the coating liquid tank 24 is equipped with a second inlet valve 26 and a second flow meter 20, which can replenish industrial water into the coating liquid tank 24 according to the set flow rate and volume. By quantitatively controlling the flow rate and volume of industrial water entering the coating liquid tank 24, and the flow rate and weight of the coating material, the ratio of the coating liquid can be accurately adjusted.

[0040] The coating liquid tank 24 is equipped with a water outlet pipe and a second water outlet valve 23. An agitator 25 is installed inside, and a drain pipe, a second drain valve 22, and a screw feeder 21 are located at the bottom. The second water outlet valve 23 is connected to the main water outlet pipe. The agitator 25 is used to stir the coating liquid, ensuring thorough and uniform mixing, while preventing excessive sedimentation and caking at the bottom of the coating liquid tank 24. When the coating liquid tank 24 is shut down due to furnace shutdown, maintenance, or other reasons, the remaining coating liquid and sediment can be discharged through the second drain valve 22 and the screw feeder 21 at the bottom.

[0041] The industrial water tank 17 is equipped with an outlet pipe and a first outlet valve 16, an inlet pipe and a first inlet valve 18, and a drain pipe and a first drain valve, which can realize the outlet, inlet, and outlet of industrial water. The first outlet valve 16 is connected to the outlet main pipe.

[0042] The main water outlet leads from the coating liquid tank 24 and the industrial water tank 17 to the area below the ore raw material silo 1. A branch pipe extends from below each ore raw material silo 1, and each branch pipe constitutes a coating unit. Each coating unit is equipped with a first flow meter 3, a variable frequency metering pump 4, a coating valve 5, and a flushing valve 2. A quantitative belt feeder 10 is located below the coating valve 5. The flushing branch pipes on each coating unit converge into the same main flushing pipe after the flushing valve 2.

[0043] When one or more quantitative belt feeders 10 start operating and discharge ore raw materials according to the set discharge program, the first outlet valve 16 closes, the second outlet valve 23 opens, the coating valve 5 on the corresponding branch pipe opens, the flushing valve 2 closes, and the variable frequency metering pump 4 starts in an interlocking manner. The coating liquid flows from the coating liquid tank 24 through the second outlet valve 23 into the main outlet pipe and branch pipes, and finally flows through the coating valve 5 to the ore raw materials on the quantitative belt feeder 10, thereby achieving coating of the ore raw materials. The variable frequency metering pump 4 can achieve accurate control of the coating liquid flow rate by using variable frequency speed regulation based on the measurement value of the first flow meter 3.

[0044] To prevent the coating solution from settling and settling in the pipes, pumps, valves, etc., of the coating system, which could lead to pipe blockage, the entire coating system pipeline must be flushed regularly with clean industrial water. When the furnace is shut down, under maintenance, or during a material discharge cycle, the second outlet valve 23 is closed, the first outlet valve 16 is opened, the flushing valves 2 on all branch pipes are opened, the coating valves 5 are closed, and the variable frequency metering pump 4 is started. Industrial water flows from the industrial water tank 17 through the first outlet valve 16 into the main outlet pipe and branch pipes, and finally flows through the flushing valves 2 into the same main flushing pipe before being discharged, thus completing the replacement and flushing of the coating solution in the entire coating system pipeline.

[0045] The ore raw materials are stored in ore raw material bins 1, and each ore raw material bin 1 can be equipped with multiple discharge ports. The ore raw materials can enter the quantitative belt feeder 10 through the first discharge gate 11 under the ore raw material bin below each discharge port. The quantitative belt feeder 10, through feedback control, can discharge the ore raw materials according to the set flow rate and weight. The quantitative belt feeder 10 adopts a horizontal conveyor belt with corrugated sidewalls on both sides, and the gate outlet has a material layer shaping function, which enables the ore raw materials to pass on the conveyor belt of the quantitative belt feeder 10 in a relatively thin material layer.

[0046] After being coated on the quantitative belt feeder 10, the ore raw material is discharged into the weighing hopper 6 below for storage. The weighing hopper 6 is equipped with a weighing sensor, which can correct for weighing errors according to the set batch weight. The coated ore raw material can be mixed evenly as it falls into the weighing hopper 6, improving the coating effect. Before the control unit at the top of the vertical shaft furnace issues the charging command, during the period when the ore raw material is stationary in the weighing hopper 6, excess water will naturally flow into the coating liquid recovery tank 9 below the weighing hopper 6 and be discharged.

[0047] Once the selected weighing hoppers 6 have completed their preparation and are filled with coated ore raw materials, the control unit at the top of the vertical furnace issues a charging command. The feeders 7 of each weighing hopper can then operate immediately, discharging the ore raw materials in the weighing hoppers 6 into the feeding conveyor belt 8, and then transporting them to the top of the vertical furnace for charging, thus improving the system's material handling capacity.

[0048] This invention's dispersion coating system can be widely applied to direct reduction ironmaking in gas-based vertical shaft furnaces. By dispersing and coating ore raw materials, adjusting and controlling the coating liquid ratio and coating amount, and using a belt feeder and weighing hopper to spread and mix the ore raw materials, the coating effect and efficiency of the ore raw materials can be effectively improved, and the coating liquid ratio and coating amount can be accurately adjusted. Furthermore, industrial water can be used to flush the coating system, avoiding blockage of the dispersion coating system pipelines and reducing engineering construction investment and production operation costs.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dispersion coating system for ore raw materials used in a gas-based vertical shaft furnace, characterized in that: It includes several ore raw material bins (1) arranged in parallel. Each ore raw material bin (1) has a corresponding coating unit at its outlet. Several coating units are connected to the coating liquid tank (24) and the industrial water tank (17) respectively through the water outlet main pipe. The ends of several coating units away from the industrial water tank (17) are connected to the same flushing main pipe through the flushing branch. It also includes a coating material silo (12) and a loss-in-weight scale (15) disposed at the outlet of the coating material silo (12), wherein the outlet end of the loss-in-weight scale (15) is connected to the inlet end of the coating liquid tank (24); The loss-in-weight scale (15) is controlled by feedback to replenish the coating material into the coating liquid tank (24) according to the set flow rate and weight. Each of the coating units includes a first flow meter (3) and a variable frequency metering pump (4) located at the outlet end. The variable frequency metering pump (4) is based on the measured value of the first flow meter (3) and performs feedback control through variable frequency speed regulation to achieve the adjustment and control of the output coating liquid flow rate. Each coating unit is provided with a quantitative belt feeder (10) at its outlet end. The quantitative belt feeder (10) is controlled by feedback and can discharge ore raw materials according to the set flow rate and weight.

2. The ore raw material dispersion coating system for a gas-based vertical shaft furnace according to claim 1, characterized in that: Each of the coating units has a coating branch at one end away from the coating liquid tank (24), and a coating valve (5) is provided on the coating branch.

3. The ore raw material dispersion coating system for a gas-based vertical shaft furnace according to claim 1, characterized in that: Each of the ore raw material bins (1) is provided with a first discharge gate (11) at the bottom, and the quantitative belt feeder (10) is correspondingly arranged below the first discharge gate (11); the bottom of the coating material bin (12) is provided with a second discharge gate (13) and a coating material feeder (14); the loss-in-weight scale (15) is correspondingly arranged below the coating material feeder (14).

4. The ore raw material dispersion coating system for a gas-based vertical shaft furnace according to claim 1, characterized in that: The industrial water tank (17) is equipped with a first drain valve (19) at the bottom for draining industrial water; the coating liquid tank (24) is equipped with a second drain valve (22) and a screw feeder (21) at the bottom for discharging the coating material sediment in the coating liquid tank (24).

5. The ore raw material dispersion coating system for a gas-based vertical shaft furnace according to claim 1, characterized in that: The industrial water tank (17) is provided with a first inlet valve (18) at its inlet, and the coating liquid tank (24) is provided with a second inlet valve (26) at its inlet. The industrial water tank (17) and the coating liquid tank (24) are supplied with industrial water through the first inlet valve (18) and the second inlet valve (26), respectively. The industrial water tank (17) is provided with a first outlet valve (16) at one end near the main outlet pipe, and the coating liquid tank (24) is provided with a second outlet valve (23) at one end near the main outlet pipe.

6. The ore raw material dispersion coating system for a gas-based vertical shaft furnace according to claim 1, characterized in that: The coating liquid tank (24) is also equipped with a stirrer (25).

7. The ore raw material dispersion coating system for a gas-based vertical shaft furnace according to claim 1, characterized in that: Each of the quantitative belt feeders (10) is provided with a weighing hopper (6) at the discharge end. Each weighing hopper (6) is connected to a coating liquid recovery tank (9) below it. The discharge end of the weighing hopper (6) is provided with a weighing hopper feeder (7) and a feeding belt machine (8).

8. The ore raw material dispersion coating system for a gas-based vertical shaft furnace according to claim 7, characterized in that: Each of the weighing hoppers (6) is equipped with a weighing sensor.

9. The ore raw material dispersion coating system for a gas-based vertical shaft furnace according to claim 1, characterized in that: The quantitative belt feeder (10) uses a horizontal conveyor belt with corrugated sidewalls on both sides.

10. The ore raw material dispersion coating system for a gas-based vertical shaft furnace according to claim 1, characterized in that: A flushing valve (2) is provided on the flushing branch.

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