Novel sintering machine distributing device

Abstract

The present application relates to sintering process technical field, and disclose a kind of novel sintering machine cloth device, including sequentially arranged feeding device according to material flow direction, multiple roller distributor and the fuel vapor injection unit being arranged below the multiple roller distributor;The multiple roller distributor includes multiple single roller, the single roller is set as hollow roller body, the inside of the hollow roller body is formed with flue gas passage, the smoke inlet end of the single roller is sealingly connected with swivel joint, and is connected to flue gas source by swivel joint, and the smoke outlet end of the single roller is connected with the conveying pipeline of the fuel vapor injection unit by swivel joint.The single roller is set as hollow roller body in the present application and hot flue gas is introduced to preheat roller surface to 100~130℃, which can continuously evaporate the moisture in the adhered material and keep it in a dry and loose state, significantly reduce the adhesion between the material and the roller surface, and create conditions for continuous scraping and shaking removal by the subsequent scraper, thereby ensuring the continuous and stable operation of cloth operation.

Description

Technical Field

[0001] This invention relates to the field of sintering process technology, specifically to a novel material feeding device for a sintering machine. Background Technology

[0002] In the field of sintering technology for iron and steel smelting, the sintering machine's feeding device is one of the core pieces of equipment affecting the output, quality, and energy consumption of sintered ore. Currently, the mainstream feeding method in the industry is a combination of a circular roller feeder and a multi-roller distributor. Its structure, from top to bottom, consists of a mixing bin, a circular roller feeder, a multi-roller distributor, and a sintering trolley. The circular roller feeder, through speed-regulating rotation, conveys the mixture to the multi-roller distributor at a certain material layer thickness. The multi-roller distributor consists of multiple single rollers of equal diameter arranged parallel to each other on the same inclined plane, with a set roller spacing between adjacent rollers. Under the action of gravity, the material rolls down the inclined surface formed by the rollers onto the trolley. Utilizing the natural segregation effect of particles of different sizes during the rolling process, coarse particles preferentially fall to the bottom of the trolley, while fine particles remain at the top of the material layer, thus forming a particle size segregated material layer structure to improve air permeability and heat and mass transfer conditions during the sintering process. Patent CN115164597A discloses a typical solution of this kind, which adds a fuel vapor injection unit below the feeding device and the multi-roller distributor. The injection pipe assembly forms a fuel vapor phase between the multi-roller distributor and the sintering trolley, so that the fine particles falling from the gap between the rollers adhere to the fuel and fall to the top of the stockpile, thereby achieving the segregation distribution of fuel content in the longitudinal direction of the material layer.

[0003] However, the aforementioned existing technologies still have significant shortcomings and defects in practical engineering applications. First, the problem of material sticking to the roller surface of multi-roller feeders is prominent. The sintering mixture has a high moisture content and contains a large amount of fine-grained powder, which easily adheres to the surface of the single roller and the gap between rollers during the feeding process. This sticky layer disrupts the smoothness of the roller surface and the conditions for material rolling segregation, resulting in a significant reduction in particle size segregation effect, deterioration of the uniformity of lateral feeding by the trolley, and consequently, increased edge air leakage and fluctuations in sinter quality. Although patent CN115164597A provides improvements in fuel segregation, its technical solution does not address measures for preventing and removing material sticking to the roller surface. Under high-moisture mixture conditions, the sticking phenomenon remains severe. Furthermore, once sticking occurs, the adsorption effect of fuel steam generated by fuel steam injection relative to the material surface is greatly reduced due to turbulent material flow, making it impossible to stably achieve the expected fuel segregation distribution. Second, the equipment lacks an online self-cleaning function, making maintenance difficult. Material easily accumulates in the bearing housing areas at both ends of each single roller of the multi-roller feeder and in the dead corners of the roller surface. Regular shutdowns for manual cleaning are necessary, which not only creates a cramped working environment and poses safety hazards, but also reduces the effective operating rate of the equipment, hindering the continuous operation of the sintering production line. Furthermore, in patent CN115164597A, the carrier gas required for the fuel steam injection unit must be supplied directly from a separate flue gas pressure stabilizing tank. The utilization of waste heat from the flue gas is limited to preheating the fuel within the conveying pipeline, leaving room for improvement in the overall energy efficiency of the system. Summary of the Invention

[0004] In view of the shortcomings of existing sintering material feeding devices mentioned in the background art, the present invention provides a novel sintering machine material feeding device, which has the advantages of roller surface preheating and anti-sticking to reduce material adhesion, waste heat cascade utilization to reduce system energy consumption, and fuel segregation distribution to optimize material layer permeability and combustion efficiency, thus solving the technical problems mentioned in the background art.

[0005] This invention provides the following technical solution: a novel sintering machine material feeding device, comprising a feeding device, a multi-roller material feeder, and a fuel steam injection unit disposed below the multi-roller material feeder, arranged sequentially according to the material flow direction; the multi-roller material feeder includes multiple single rollers, each single roller being a hollow roller body with a flue gas channel formed inside; the flue gas inlet end of each single roller is sealed and connected to a rotary joint, and connected to a flue gas source through the rotary joint; the flue gas outlet end of each single roller is connected to the conveying pipe of the fuel steam injection unit through the rotary joint; the multi-roller material feeder further includes a floating scraper assembly and an intermittent vibration mechanism, wherein the scraper blades of the floating scraper assembly are attached to the outer roller surface of the single roller, and the intermittent vibration mechanism is disposed inside the shaft end of the single roller.

[0006] Preferably, the feeding device includes a roller feeder and a mixing hopper disposed above the roller feeder.

[0007] Preferably, the multi-roller fabric feeder is inclined, the multiple single rollers have the same diameter and a roller spacing of 4mm, and each single roller is driven to rotate by a transmission device.

[0008] Preferably, the inlet end of the single roller is connected to the flue gas branch pipe through the rotary joint. The flue gas branch pipe is equipped with an electric regulating valve and a temperature sensor. Both the electric regulating valve and the temperature sensor are electrically connected to the PLC control system to control the temperature of the outer roller surface of the hollow roller body.

[0009] Preferably, the fuel vapor injection unit includes an injection pipe assembly and a conveying pipe connected to the inlet end of the injection pipe assembly; the injection pipe assembly includes a pair of horizontally opposite injection pipes A and B, both of which have nozzles on their surfaces, and the nozzles of the two rows of nozzles are arranged opposite to each other.

[0010] Preferably, the conveying pipeline is provided with a fuel inlet pipe, a steam inlet pipe, a fuel concentration sensor, and a pressure sensor in sequence along the airflow direction.

[0011] Preferably, the floating scraper assembly includes the scraper blade and an elastic clamping member, the elastic clamping member being disposed on both sides of the scraper blade, and the cutting edge of the scraper blade being pressed against the outer roller surface of the single roller with constant pressure.

[0012] Preferably, the intermittent rapping mechanism includes an eccentric wheel, a rapping motor, and an electromagnetic clutch assembly. The eccentric wheel is installed in the inner hole of the shaft head of the single roller, and the output shaft of the rapping motor is connected to the eccentric wheel via the electromagnetic clutch assembly.

[0013] Preferably, a hot air curtain nozzle is provided in the frame space between the multi-roller fabric distributor and the fuel steam injection unit. The hot air curtain nozzle is a row of flat nozzles, and its air inlet end is connected to the flue gas source.

[0014] Preferably, the flue gas discharged from the single roller's exhaust end is channeled into the upstream air inlet of the conveying pipeline via a return flue.

[0015] The present invention has the following beneficial effects: 1. This invention sets the single roller as a hollow roller body and introduces hot flue gas to preheat the roller surface to 100℃~130℃, which enables the moisture in the adhering material to evaporate continuously and remain in a dry and loose state, significantly reducing the adhesion between the material and the roller surface. This creates favorable conditions for subsequent continuous scraping by the scraper and vibration cleaning, thereby ensuring the continuous and stable operation of the fabric application process.

[0016] 2. This invention introduces the waste heat flue gas flowing through the single-roller flue gas channel into the conveying pipe of the fuel steam injection unit as the carrier gas, which can realize the cascade utilization of the waste heat of the sintering flue gas. It can meet the temperature requirements of the injection gas flow without the need for additional heating devices, effectively reducing the overall energy consumption and operating cost of the system.

[0017] 3. By setting up relatively blowing nozzles A and B below the multi-roller distributor to form a uniform coal powder steam phase, the present invention enables fine particles in the falling material to preferentially adsorb fuel while coarse particles adsorb less, thereby achieving a segregated distribution of fuel in the thickness direction of the material layer, which helps to optimize the permeability of the sintering material layer and the fuel combustion efficiency.

[0018] 4. By setting up a floating scraper assembly in conjunction with an intermittent rapping mechanism, the present invention enables the scraper blade to always stick to the roller surface and continuously scrape off the accumulated material under the action of the elastic clamping element. At the same time, the rapping motor drives the eccentric wheel to generate high-frequency low-amplitude vibration to remove the accumulated material in dead corners, realizing online self-cleaning without stopping the machine, and greatly reducing the frequency of manual cleaning and maintenance downtime.

[0019] 5. This invention forms an air curtain by continuously blowing hot flue gas through hot air curtain nozzles below the multi-roller distributor. This effectively prevents the steam from the moist coal powder below from mixing back up to the scraper area, avoiding secondary contamination of the scraper blade and single roller surface. At the same time, the hot air blows directly on the blade edge to prevent the scraper from sticking to the material and maintain long-term scraping efficiency. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the bottom of the multi-roller fabric feeder structure of the present invention; Figure 3 This is a schematic diagram of the internal structure of the multi-roller fabric feeder of the present invention; Figure 4 This is a schematic diagram of the intermittent rapping mechanism of the present invention; Figure 5 For the present invention Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0021] In the diagram: 1. Feeding device; 11. Circular roller feeder; 12. Mixing hopper; 2. Multi-roller distributor; 21. Single roller; 211. Hollow roller body; 212. Flue gas passage; 22. Rotary joint; 3. Fuel steam injection unit; 31. Injection pipe assembly; 311. Injection pipe A; 312. Injection pipe B; 32. Conveying pipe; 6. Floating scraper assembly; 61. Scraper blade; 62. Elastic clamping component; 7. Intermittent rapping mechanism; 71. Eccentric wheel; 72. Rap ​​motor; 73. Electromagnetic clutch assembly; 8. Hot air curtain nozzle. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1 A novel sintering machine material feeding device is disclosed, specifically a sintering material feeding device that combines fuel steam segregation feeding with online self-cleaning functions. The device includes a feeding device 1, a multi-roller material feeder 2, and a fuel steam injection unit 3 located below the multi-roller material feeder 2, arranged sequentially from top to bottom according to the material flow direction. The feeding device 1 includes a circular roller feeder 11 and a mixing hopper 12 located above the circular roller feeder 11. The multi-roller material feeder 2 is inclined at an angle of 38° and includes multiple single rollers 21 with equal diameters and a roller spacing of 4 mm. There are nine single rollers 21 in total, and each single roller 21 is driven to rotate via a transmission device (not shown in the figure).

[0024] Each roller 21 of the multi-roller feeder 2 is a hollow roller body 211, with an axially extending flue gas channel 212 formed inside the hollow roller body 211. The inlet end of each roller 21 is sealed to the rotating end of a rotary joint 22 via a seal, while the fixed end of the rotary joint 22 is connected to a flue gas branch pipe. The inlet end of the flue gas branch pipe is connected to the outlet of a flue gas pressure stabilizing tank, and an electric regulating valve and a temperature sensor are sequentially arranged along the flue gas flow direction on the flue gas branch pipe. Both the electric regulating valve and the temperature sensor are electrically connected to a PLC control system. The PLC adjusts the opening of the electric regulating valve based on the roller surface temperature signal fed back by the temperature sensor, thereby stably controlling the outer roller surface temperature of the hollow roller body 211 within the range of 100℃ to 130℃.

[0025] The flue gas inlet of the flue gas stabilizing tank is used to connect to the upstream flue gas circulation pipeline, such as the main flue of the sintering machine or the exhaust gas pipeline of the cooler, and receives flue gas with a temperature of 150℃~300℃. After the flue gas stabilizes and buffers the incoming flue gas, it enters the flue gas channel 212 of each single roller 21 through the flue gas branch pipeline to complete the preheating of the single roller 21; then it is sent to the fuel steam injection unit 3 through the conveying pipeline 32 as the conveying carrier gas.

[0026] like Figure 2As shown, the fuel steam injection unit 3 includes an injection pipe assembly 31 and a conveying pipe 32 connected to the inlet end of the injection pipe assembly 31. The air inlet end of the conveying pipe 32 is connected to the outlet of the flue gas passage 212, and a fuel inlet pipe, a steam inlet pipe, a fuel concentration sensor, and a pressure sensor are sequentially arranged on the conveying pipe 32 along the airflow direction. The inlet of the fuel inlet pipe is connected to the outlet of the pulverizer, and the air inlet of the pulverizer is connected to the air outlet of the blower. The fuel concentration sensor is electrically connected to the blower through a feedback control system to adjust the fuel supply in real time. The injection pipe assembly 31 includes a pair of horizontally opposite injection pipes A311 and B312. The surfaces of injection pipes A311 and B312 are provided with uniformly spaced nozzles along the axial direction, and the nozzles of the two rows are arranged opposite each other to form a uniform and stable coal powder steam phase in the space below the multi-roller distributor 2.

[0027] The flue gas passing through the internal flue gas passage 212 of the single roller 21 is discharged from the outlet end of the rotary joint 22 and merges into the upstream of the air inlet end of the conveying pipeline 32 through the return flue gas pipeline. It mixes with the flue gas directly supplied by the flue gas pressure stabilizing tank 4 and together they serve as the carrier gas for fuel injection. While the flue gas flowing through the inside of the single roller 21 preheats the roller surface, its own temperature decreases slightly. After mixing with the high-temperature flue gas directly drawn from the pressure stabilizing tank, the temperature of the injected airflow can be guaranteed, and the waste heat of the flue gas can be utilized in stages without the need for additional heating devices.

[0028] The multi-roller feeder 2 also includes a floating scraper assembly 6 and an intermittent oscillation mechanism 7 for non-stop self-cleaning of the outer roller surface of the single roller 21. The floating scraper assembly 6 includes a scraper blade 61 and elastic clamping elements 62. The scraper blade 61 is a long, strip-shaped, wear-resistant ceramic blade arranged along the entire axial length of the single roller 21. Elastic clamping elements 62 are located on both sides of the blade and are connected to the side plates of the feeder frame using constant pressure springs, ensuring that the cutting edge of the scraper blade 61 is pressed against the outer roller surface of the single roller 21 with constant pressure. When the single roller 21 rotates, the scraper blade 61 continuously scrapes away trace amounts of material adhering to the roller surface.

[0029] The intermittent rapping mechanism 7 is located inside the non-drive end shaft of the single roller 21 and includes an eccentric wheel 71, a rapping motor 72, and an electromagnetic clutch assembly 73. The eccentric wheel 71 is installed in the inner hole of the shaft of the single roller 21, and the rapping motor 72 is fixed on the frame. Its output shaft is connected to the eccentric wheel 71 via the electromagnetic clutch assembly 73. When the PLC controls the electromagnetic clutch assembly 73 to engage according to a preset time period or based on the feedback signal from the scraper resistance sensor, the rapping motor 72 drives the eccentric wheel 71 to rotate, generating high-frequency, low-amplitude mechanical vibration. This vibration is transmitted through the shaft to the entire single roller 21, causing loose material to fall off the roller surface and the dead corners at both ends. Since the surface of the single roller 21 has been preheated to 120°C, the moisture in the accumulated material continues to evaporate, leaving the material in a dry and loose state. The rapping removal effect is significant and the energy consumption is low.

[0030] like Figure 3 As shown, a hot air curtain nozzle 8 is also installed in the frame space between the multi-roller distributor 2 and the blowpipe assembly 31. The hot air curtain nozzle 8 is a row of flat nozzles arranged along the width of the trolley, and its air inlet end is connected to the outlet of the flue gas branch pipe 5 or the flue gas pressure tank 4 through a branch pipe. The nozzle of the hot air curtain nozzle 8 is inclined downward, continuously blowing hot flue gas at a temperature of over 100°C, forming a hot air curtain below the floating scraper assembly 6, preventing the steam from the moist coal powder below from mixing upward to the scraper area, thus avoiding secondary contamination of the scraper blade 61 and the surface of the single roller 21; secondly, the hot air directly blows on the cutting edge of the scraper blade 61, further preventing the scraper blade from sticking to the material itself and maintaining scraping efficiency. Integrating the hot air curtain nozzle 8 near the scraper area makes full use of the same flue gas source, eliminating the need for additional fans or heaters, resulting in a compact structure and synergistic efficiency.

[0031] The method of using (working principle) of this invention is as follows: In use, the mixed material in the mixing bin 12 falls onto the surface of the roller feeder 11. The roller feeder 11 rotates and conveys the material downwards to the inclined multi-roller distributor 2 with a certain material layer thickness. The nine single rollers 21 of the multi-roller distributor 2 rotate synchronously under the drive of the transmission device. The single rollers 21 have the same diameter and a roller gap of 4mm. Under the combined action of gravity and roller surface friction, the material spreads downwards along the 38° inclined surface and is initially classified. The coarser particles roll down to the bottom of the trolley below first, while the finer particles remain on the upper part of the material layer, forming a segregated material distribution effect.

[0032] Meanwhile, flue gas at 150℃~300℃ from the upstream flue gas recirculation pipeline first enters the flue gas pressure stabilizing tank for pressure stabilization and buffering, and then enters the fixed end of the rotary joint 22 through the flue gas branch pipeline. The flue gas is then sealed and introduced into the flue gas channel 212 inside the hollow roller body 211 of the single roller 21 through the rotating end of the rotary joint 22. The PLC control system adjusts the opening of the electric regulating valve on the flue gas branch pipeline according to the roller surface temperature signal fed back by the temperature sensor, stabilizing the outer roller surface temperature of the hollow roller body 211 within the range of 100℃~130℃. During the flow of the flue gas through the flue gas channel 212, the roller surface of the single roller 21 is continuously preheated, causing the moisture contained in the trace materials adhering to the roller surface to evaporate, leaving the material in a dry and loose state.

[0033] The flue gas after preheating the single roller 21 is discharged from the rotary joint 22 at the flue gas outlet of the single roller 21, and flows into the upstream of the air inlet of the conveying pipeline 32 through the flue gas return pipeline. It mixes with the high-temperature flue gas directly drawn from the flue gas pressure stabilizing tank as the carrier gas for fuel injection. The mixed carrier gas flows along the conveying pipeline 32. The fuel inlet pipe supplies the coal powder prepared by the grinding mill into the conveying pipeline 32 in a metered manner. The steam inlet pipe simultaneously introduces an appropriate amount of steam. The fuel concentration sensor monitors the coal powder concentration in real time and adjusts the fan speed through the feedback control system to stabilize the fuel supply. The carrier gas carries the coal powder steam into the injection pipe assembly 31. The uniformly spaced nozzles on the surface of the injection pipes A311 and B312 are arranged opposite each other along the axial direction to spray, forming a uniform and stable coal powder steam phase in the space below the multi-roller distributor 2. When the material falling from the multi-roller distributor 2 passes through this coal powder steam phase, the fine particles adsorb coal powder on their surface, while the coarse particles adsorb less, realizing the secondary segregation distribution of fuel in the material layer.

[0034] During the fabric application process, the blades 61 of the floating scraper assembly 6, under the action of the constant pressure spring group of the elastic clamping member 62, have their cutting edges pressed against the outer roller surface of the rotating single roller 21 with constant pressure, continuously scraping off the small amount of loose material that has dried due to preheating. When the PLC controls the electromagnetic clutch group 73 to engage according to the preset time cycle or based on the feedback signal from the scraper resistance sensor, the vibrating motor 72 drives the eccentric wheel 71 installed in the inner hole of the shaft head of the single roller 21 to rotate, generating high-frequency, low-amplitude mechanical vibration. The vibration is transmitted through the shaft head to the entire single roller 21, causing the loose accumulated material on the roller surface and in the dead corners at both ends to fall off, achieving self-cleaning without stopping the machine. Simultaneously, the hot air curtain nozzles 8 introduce hot flue gas from the flue gas branch pipe or flue gas pressure tank, continuously spraying hot air above 100°C with a row of flat nozzles tilted downwards. This forms a hot air curtain below the floating scraper assembly 6, preventing the moisture from pulverized coal steam from rising and contaminating the scraper area, and directly blowing hot air onto the scraper blades 61 to prevent material from sticking to them, thus maintaining scraping efficiency. This ensures the coordinated operation of preheating, material distribution, fuel injection, and online self-cleaning to complete the entire sintering material distribution operation.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel material feeding device for a sintering machine, comprising a feeding device (1), a multi-roller material feeder (2), and a fuel steam injection unit (3) disposed below the multi-roller material feeder (2), arranged sequentially according to the material flow direction; the multi-roller material feeder (2) comprises a plurality of single rollers (21), characterized in that: The single roller (21) is configured as a hollow roller body (211), and a flue gas channel (212) is formed inside the hollow roller body (211). The inlet end of the single roller (21) is sealed with a rotary joint (22) and connected to the flue gas source through the rotary joint (22). The outlet end of the single roller (21) is connected to the conveying pipe (32) of the fuel steam injection unit (3) through the rotary joint (22). The multi-roller fabric feeder (2) also includes a floating scraper assembly (6) and an intermittent vibration mechanism (7). The scraper blade (61) of the floating scraper assembly (6) is attached to the outer roller surface of the single roller (21), and the intermittent vibration mechanism (7) is located inside the shaft end of the single roller (21).

2. The novel sintering machine material feeding device according to claim 1, characterized in that: The feeding device (1) includes a roller feeder (11) and a mixing hopper (12) disposed above the roller feeder (11).

3. The novel sintering machine material feeding device according to claim 1, characterized in that: The multi-roller fabric feeder (2) is inclined, and the multiple single rollers (21) have the same diameter and a roller spacing of 4mm. Each single roller (21) is driven to rotate by a transmission device.

4. The novel sintering machine material feeding device according to claim 1, characterized in that: The inlet end of the single roller (21) is connected to the flue gas branch pipe through the rotary joint (22). An electric regulating valve and a temperature sensor are provided on the flue gas branch pipe. The electric regulating valve and the temperature sensor are electrically connected to the PLC control system to control the temperature of the outer roller surface of the hollow roller body (211).

5. A novel sintering machine material feeding device according to claim 1, characterized in that: The fuel vapor injection unit (3) includes an injection pipe assembly (31) and a conveying pipe (32) connected to the inlet end of the injection pipe assembly (31); the injection pipe assembly (31) includes a pair of horizontally opposite injection pipes A (311) and B (312), and nozzles are provided on the surface of both injection pipes A (311) and B (312), and the nozzles of the two rows of nozzles are arranged opposite each other.

6. A novel sintering machine material feeding device according to claim 5, characterized in that: The conveying pipeline (32) is provided with a fuel inlet pipe, a steam inlet pipe, a fuel concentration sensor and a pressure sensor in sequence along the airflow direction.

7. A novel sintering machine material feeding device according to claim 1, characterized in that: The floating scraper assembly (6) includes the scraper blade (61) and an elastic clamping member (62). The elastic clamping member (62) is disposed on both sides of the scraper blade (61). The cutting edge of the scraper blade (61) is pressed against the outer roller surface of the single roller (21) with constant pressure.

8. A novel sintering machine material feeding device according to claim 1, characterized in that: The intermittent rapping mechanism (7) includes an eccentric wheel (71), a rapping motor (72), and an electromagnetic clutch assembly (73). The eccentric wheel (71) is installed in the inner hole of the shaft head of the single roller (21). The output shaft of the rapping motor (72) is connected to the eccentric wheel (71) through the electromagnetic clutch assembly (73).

9. A novel sintering machine material feeding device according to claim 1, characterized in that: A hot air curtain nozzle (8) is provided in the frame space between the multi-roller fabricator (2) and the fuel steam injection unit (3). The hot air curtain nozzle (8) is a row of flat nozzles, and its air inlet end is connected to the flue gas source.

10. A novel sintering machine material feeding device according to claim 1, characterized in that: The flue gas discharged from the exhaust end of the single roller (21) is channeled into the upstream end of the air inlet of the conveying pipe (32) through the return flue pipe.

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