Mica roasting kiln utilizing waste heat for pre-drying

Abstract

The invention provides a mica roasting kiln utilizing waste heat for pre-drying, and belongs to the technical field of mica processing and production. The technical problems of high energy consumption, heavy flying dust pollution and the like in the prior art are solved. The mica roasting kiln utilizing the waste heat for pre-drying comprises a kiln body and a conveying mechanism, a linear channel is configured to be a pre-drying area and a roasting area which are distributed from a flat feeding port to a flat discharging port, and the two ends of an annular metal thin strip extend to the outer portion of the flat feeding port and the outer portion of the flat discharging port respectively. A discharging mechanism capable of reducing dust drifting is arranged at the discharging end, a first electric heating unit located below the annular metal thin strip is arranged in the pre-drying area, a plurality of second electric heating units which are distributed in the length direction of the annular metal thin strip and arranged in an up-down staggered mode are arranged in the roasting area, and a moisture discharging mechanism is arranged at the top of the pre-drying area. A heat insulation structure capable of reducing heat overflow is arranged, and a material scattering mechanism used for scattering mica is arranged between the pre-drying area and the roasting area. The device has the advantages of high efficiency, energy conservation, high product quality, no dust raising and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of mica processing and production, relates to furnace equipment, and particularly relates to a mica roasting furnace using waste heat for pre-drying. Background Art

[0002] A mica roasting furnace is a device for high-temperature treatment of mica raw materials, mainly applied in processes such as mica powder processing, and realizes the structural transformation of removing crystal water through temperature-controlled roasting. In the prior art, there are problems of dust pollution. Moreover, since crystal water will escape into the furnace air after precipitation during the processing, a large amount of heat energy is discharged together while discharging moisture, resulting in waste. For this reason, people have carried out long-term explorations and proposed various solutions.

[0003] For example, a Chinese patent document discloses a dust-free mica calcination production line [Application No.: CN201410167186.X], which includes a calciner. One end of the calciner is connected to a first mica conveying mechanism, and the other end of the calciner is connected to a second mica conveying mechanism. A cooling jacket mechanism that can pass cooling water and cool the mica in the second mica conveying mechanism is sleeved outside the second mica conveying mechanism; the second mica conveying mechanism is also connected to a dust removal mechanism. The dust removal mechanism includes a dust suction pipe connected to the mica conveying mechanism. The dust suction pipe is connected to an electrostatic precipitator, and the electrostatic precipitator is connected to a dust removal fan. A cooling jacket mechanism is also sleeved outside the dust suction pipe. This invention has the advantages of being able to recover heat energy and improve the production environment.

[0004] Although the above solution has the functions of heat energy recovery and dust reduction, the recovered heat energy cannot be directly applied to the heating process, and the recovery efficiency is low. On the other hand, it cannot fundamentally avoid dust, and suppressing dust requires additional energy consumption, resulting in a high cost. The processing method of directly performing high-temperature roasting on raw materials is prone to uneven roasting, affecting the quality of the final product and the processing efficiency. Summary of the Invention

[0005] The object of the present invention is to provide a highly efficient and energy-saving mica roasting furnace for solving the above problems.

[0006] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a mica roasting kiln for pre-drying using waste heat comprises a furnace body and a transmission mechanism, a flat feed port and a flat discharge port are arranged on the furnace body, the flat feed port and the flat discharge port are connected through a linear channel, the linear channel is configured as a pre-drying zone and a roasting zone distributed from the flat feed port to the flat discharge port, a flat feed port, a linear channel and a flat discharge port are penetrated on the upper side of the annular metal strip of the transmission mechanism, and the two ends of the annular metal strip extend to the outside of the flat feed port and the outside of the flat discharge port respectively, a discharge mechanism capable of reducing dust dispersion is arranged on the discharge end of the annular metal strip, the height between the upper surface of the annular metal strip and the top surface in the pre-drying zone is greater than the height between the top surface in the roasting zone and the upper surface of the annular metal strip, a first electric heating unit is arranged below the annular metal strip in the pre-drying zone, and a plurality of second electric heating units are arranged in the roasting zone, which are distributed along the length direction of the annular metal strip and are staggered up and down. A dehumidification mechanism is provided at the top of the pre-drying area, and an insulation structure capable of reducing the heat spillover from the first electric heating unit and the second electric heating unit is provided between the furnace body and the flat feed port, the linear channel and the flat discharge port. A material breaking mechanism for breaking up a number of bonded mica after pre-drying is provided between the pre-drying area and the roasting area.

[0007] The specially designed flat feed and discharge ports, as well as the discharge mechanism that reduces dust dispersion, can fundamentally avoid dust pollution. By setting the dehumidification mechanism at the top of the pre-drying area, and the heat insulation structure, the wasted heat can be reduced, which has the effect of saving energy. By setting up the pre-drying area and the roasting area separately, the processing efficiency and the quality of the final product can be improved, and the material body scattering mechanism can further improve the uniformity of the raw materials during roasting, and further improve the quality of the final product.

[0008] In the above-mentioned mica roasting kiln using waste heat for pre-drying, the pre-drying zone includes a dehumidification zone 1 arranged at the top of the pre-drying zone, and a dehumidification zone 2 is respectively arranged between the dehumidification zone 1 and the flat feed port and the pre-drying zone, the distance between the top of the dehumidification zone 1 and the upper surface of the annular metal strip is H1, the distance between the dehumidification zone 2 and the upper surface of the annular metal strip is H2, and H1>H2; The distance between the upper surface of the annular metal strip and the top of the flat feed port is H3, and the distance between the upper surface of the annular metal strip and the top of the roasting zone is H4, H3=H4<H2. The different heights of the dehumidification zone 1 and the adjacent dehumidification zone 2 form a graded dehumidification structure, which is conducive to forming different dehumidification strengths at different positions and improving dehumidification efficiency.

[0009] In the above-mentioned mica roasting kiln using waste heat for pre-drying, the length of the first moisture exhaust area is L1, the length of the second moisture exhaust area is L2, and the length of the second electric heating unit is L3. The ratio of H1, H2, H3, L1, L2 to L3 is 5:3:1:16:16:16. The length of the electric heating unit is the same as that of the first and second moisture exhaust areas. This design ensures that the mica is heated evenly, improving the roasting quality.

[0010] In the above-mentioned mica roasting kiln using waste heat for pre-drying, the first electric heating unit includes a number of first electric heating rods arranged horizontally along the length direction and located below the upper side of the annular metal strip. The second electric heating unit includes a number of second electric heating rods arranged horizontally along the length direction of the annular metal strip. The horizontal design of the electric heating rods enables the heat to be directly and efficiently transferred to the mica on the annular metal strip, reducing heat loss, contributing to improving the roasting efficiency and shortening the roasting time.

[0011] In the above-mentioned mica roasting kiln using waste heat for pre-drying, the moisture exhaust mechanism includes at least one first moisture exhaust hole provided at the top of the first moisture exhaust area, and a second moisture exhaust hole is provided at the top of the second moisture exhaust area. Both the first moisture exhaust hole and the second moisture exhaust hole are connected to the collecting pipe, and the second moisture exhaust hole is located on both sides of the first moisture exhaust hole. The collecting pipe is connected to the moisture exhaust negative pressure pump through the main negative pressure extraction pipe, and the connection end of the main negative pressure extraction pipe and the collecting pipe is close to the first moisture exhaust hole. An auxiliary negative pressure extraction impeller is provided between the main negative pressure extraction pipe and the collecting pipe. The auxiliary negative pressure extraction impeller is connected to an auxiliary motor. An auxiliary impeller installation hole is opened on the side of the collecting pipe away from the main negative pressure extraction pipe. The auxiliary impeller installation hole is closed by an auxiliary motor fixing plate, and the auxiliary motor is fixed on the auxiliary motor fixing plate.

[0012] By providing the first moisture exhaust hole and the second moisture exhaust hole in the first and second moisture exhaust areas respectively and connecting them to the collecting pipe uniformly, the water vapor generated during the roasting process can be quickly and effectively discharged out of the furnace, avoiding the accumulation of moisture in the furnace and affecting the roasting effect. An auxiliary negative pressure extraction impeller is provided between the main negative pressure extraction pipe and the collecting pipe and driven by an auxiliary motor, which can further enhance the moisture exhaust capacity.

[0013] In the above-mentioned mica roasting kiln using waste heat for pre-drying, the transmission mechanism includes a driving wheel and a driven wheel respectively arranged at the outer ends of the discharge port and the feed port. A continuous metal thin belt is sleeved on the driving wheel and the driven wheel. The driving wheel is connected to a driving wheel driver. A number of roller shafts are provided at the upper and lower bottoms of the annular metal thin belt. Some or all of the roller shafts at the bottom of the upper side of the annular metal thin belt are connected to a roller shaft rotation driving assembly. A belt body deviation correction mechanism is also provided at the lower side of the annular metal thin belt. Setting the belt body deviation correction mechanism at the lower side of the annular metal thin belt can monitor and correct the deviation of the metal thin belt during transmission in real time. This design ensures that the metal thin belt always remains on the predetermined transmission path, avoiding problems such as uneven roasting or equipment damage caused by deviation.

[0014] In the above-mentioned mica roasting kiln using waste heat for pre-drying, the belt body deviation correction mechanism includes a deviation detection assembly arranged at the lower side of the annular metal thin belt. The lower side of the annular metal thin belt is threaded through a deviation corrector. The deviation corrector includes a deviation correction frame. An upper pinch roller is provided on the deviation correction frame. Two lower pinch rollers parallel to each other are provided on both sides below the upper pinch roller. The upper pinch roller and the lower pinch rollers are rotationally connected to the deviation correction frame. The lower side of the annular metal thin belt is threaded through between the upper pinch roller and the two lower pinch rollers. A clamping degree adjustment assembly is provided between the upper pinch roller and the deviation correction frame. Sliders are respectively provided at both ends of the pinch rollers on the deviation correction frame. The sliders are arranged on two slide rails of a sliding guide seat. The sliders are rotationally connected to the deviation correction frame. The central axis of the slide rail is inclined to the central axis of the annular metal thin belt and forms an angle of 45°. An electric linear displacement cylinder is provided between one of the sliders and the sliding guide seat. The bottom of the sliding guide seat is fixed on a deviation correction base. The deviation detection assembly includes at least one displacement sensor arranged at the side of the annular metal thin belt. A height adjustable assembly is provided between the displacement sensor and the deviation detection assembly. The height adjustable assembly includes height adjustment bases fixed at both ends of the deviation correction base. A height adjustment groove is provided on the height adjustment base. A height adjustment rod is provided in the height adjustment groove. The displacement sensor is provided on the height adjustment rod.

[0015] The clamping degree between the upper pinch roller and the lower pinch rollers can be adjusted through the clamping degree adjustment assembly, so as to achieve precise control of the metal thin belt. This design ensures the stability and accuracy of the deviation correction process. The displacement sensor in the deviation detection assembly is installed through the height adjustable assembly, and the height of the displacement sensor can be adjusted according to actual needs, improving the versatility and adaptability of the equipment.

[0016] In the above-mentioned mica roasting kiln using waste heat for pre-drying, the material dispersion mechanism includes a dispersion roller arranged horizontally above the metal conveyor belt between the pre-drying area and the roasting area. Spiral stirring and dispersing impellers are arranged on the dispersion roller along its length direction, and the stirring and dispersing impellers are integrated with the dispersion roller. Both ends of the dispersion roller are located on both sides of the metal conveyor belt, and height adjustment mechanisms capable of adjusting the height of the mica passage gap between the dispersion roller and the metal conveyor belt are provided at both ends of the dispersion roller. One end of the dispersion roller is connected to a rotary drive. By arranging a dispersion roller between the pre-drying area and the roasting area and providing spiral stirring and dispersing impellers on the dispersion roller, the mica that may aggregate together after pre-drying can be effectively dispersed, ensuring that the mica is fully dispersed before entering the roasting area and improving the uniformity and efficiency of roasting.

[0017] In the above-mentioned mica roasting kiln using waste heat for pre-drying, the discharging mechanism includes a C-shaped dust-proof cover arranged at one end of the annular metal thin belt. Dust-proof side baffles are provided on both sides of the dust-proof cover. A collecting box with an open top is provided at the bottom of the dust-proof cover. Two negative-pressure discharging ports are respectively provided at both ends of the collecting box, and the negative-pressure discharging ports are connected to a negative-pressure suction component. A two-way feeding auger capable of sending the mica powder entering from the open top to the negative-pressure discharging ports is arranged in the collecting box, and the two-way feeding auger is connected to an auger drive component. A dust-raising adsorption port extending horizontally in a strip shape is provided at the upper end of the dust-proof cover to prevent the falling mica powder from rising and floating out, and the dust-raising adsorption port is connected to a dust-raising adsorption component. An elastic dust-proof strip is arranged horizontally in a sheet shape at the top of the dust-proof cover, and a feeding gap is formed between the elastic dust-proof strip and the annular metal thin belt; a material leakage port is provided at the bottom of the dust-proof cover, and the opening is docked with the material leakage port. The dust-proof cover and the collecting box are fixed through a detachable structure. The detachable structure includes a first annular fixing seat arranged on the material leakage port, a second annular fixing seat is arranged on the opening and is matched with the first annular fixing seat, and a number of quick-connection units are arranged circumferentially between the first annular fixing seat and the second annular fixing seat.

[0018] Two negative-pressure discharging ports are provided on the collecting box and are connected to the negative-pressure suction component. The mica powder is sent to the negative-pressure discharging ports through the two-way feeding auger. This design can quickly and efficiently discharge the mica powder from the collecting box, improving the discharging efficiency.

[0019] The dust-proof cover is C-shaped, and dust-proof side baffles are provided on both sides. Moreover, a feeding gap is formed between the elastic dust-proof strip arranged at the top of the dust-proof cover and the annular metal thin belt, which not only ensures the normal falling of the mica powder but also prevents the dust from escaping from the gap. Coupled with the dust-raising adsorption port connected to the dust-raising adsorption component, it can adsorb and collect the dust that may be generated during the discharging process. Multiple facilities ensure that the dust pollution to the environment is avoided.

[0020] In the above-mentioned mica roasting kiln using waste heat for pre-drying, several cooling fans distributed horizontally are provided between the discharging mechanism and the flat discharging port, below the upper side of the annular metal belt, and the cooling fans are fixed on the frame of the furnace body. The cooling fans set between the discharging mechanism and the flat discharging port can instantaneously cool the mica during the process of transporting and discharging it from the roasting area. Moreover, this design with the cooling fans located below the upper side of the annular metal belt can ensure that while effectively reducing the temperature during discharging, it will not blow away the materials and cause dust.

[0021] Compared with the existing technology, the advantages of the mica roasting kiln using waste heat for pre-drying are as follows: 1. The recovered heat energy is directly used to heat the raw materials, with high heat energy recovery efficiency. 2. It has a variety of dust suppression structure designs to avoid environmental pollution. 3. It has an efficient moisture discharge mechanism and a discharging design with double-directional negative pressure, with high processing and production efficiency. 4. It has a structure design of preheating first and then roasting to ensure uniform heating of the raw materials, with high product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram provided by the present invention.

[0023] Figure 2 It is a schematic structural diagram of another angle provided by the present invention.

[0024] Figure 3 It is a schematic cross-sectional structural diagram provided by the present invention.

[0025] Figure 4 It is a schematic cross-sectional structural diagram of another provided by the present invention.

[0026] Figure 5 It is a schematic structural diagram of the discharging mechanism provided by the present invention.

[0027] Figure 6 It is a schematic structural diagram of the aggregate box provided by the present invention.

[0028] Figure 7 It is a schematic structural diagram of the connection between the aggregate box and the dust-proof cover provided by the present invention.

[0029] Figure 8 It is a schematic structural diagram of the height adjustment mechanism provided by the present invention.

[0030] Figure 9 It is a schematic structural diagram of the dispersing roller provided by the present invention.

[0031] Figure 10 It is a schematic structural diagram of the ceramic rod body provided by the present invention.

[0032] Figure 11 It is a schematic structural diagram of the belt deviation correction mechanism provided by the present invention.

[0033] Figure 12 It is a schematic structural diagram of Embodiment 2 provided by the present invention.

[0034] Figure 13 It is a schematic structural diagram of the ceramic rod body of Embodiment 2 provided by the present invention.

[0035] Figure 14 It is a schematic structural diagram of Embodiment 3 provided by the present invention.

[0036] Figure 15 It is a schematic sectional structural diagram of Embodiment 3 provided by the present invention.

[0037] In the figure, there are furnace body 1, flat feed inlet 11, flat discharge outlet 12, linear channel 13, heat insulation structure 14, loop heat insulation layer 141, frame 15, transmission mechanism 2, annular metal thin belt 21, driving wheel 22, driving wheel driver 221, driven wheel 23, roller shaft 24, roller shaft rotation driving assembly 241, roller 242, central shaft 243, gear 244, driven chain 245, gear driver 246, bearing seat 25, carbon brush fixing seat 251, carbon brush 252, pre-drying area 3, first electric heating unit 31, first electric heating rod 311, moisture exhaust mechanism 32, first moisture exhaust hole 321, second moisture exhaust hole 322, collecting pipe 323, negative pressure extraction main pipe 324, auxiliary motor 325, auxiliary impeller mounting hole 326, auxiliary motor fixing plate 327, moisture exhaust area 1 33, moisture exhaust area 2 34, transition inclined plane 35, roasting area 4, second electric heating unit 41, second electric heating rod 411, discharging mechanism 5, dust-proof cover 51, material leakage port 511, dust-proof side baffle 52, aggregate box 53, opening 531, negative pressure discharging port 532, two-way feeding auger 533, auger driving assembly 534, position adjusting roller 535, external connecting pipe 536, straight pipe 537, dust and dust adsorption assembly 54, dust and dust adsorption port 541, elastic dust-proof strip 55, feeding gap 551, detachable structure 56, first annular fixing seat 561, second annular fixing seat 562, quick-connect unit 563, cooling fan 57, inner shock-absorbing rubber seat 571, inner fan card slot 572, outer shock-absorbing rubber seat 573, outer fan card slot 574, air guide cylinder 58, cooling air outlet 581, inner card slot 582, entrance and exit 583, partition board 584, fan mounting port 585, cold air inlet 586, hot air outlet 587, air guide arc part 588, annular seat 59, elastic needle bar 591, clamping edge 592, clamping block 593, material body dispersing mechanism 6, dispersing roller 61, stirring impeller 62, mica passage gap 63, mica passage gap 63, height adjusting mechanism 64, lifting seat 641, height adjusting bracket 642, height adjusting slider 643, height adjusting slide rail 644, lifting screw 645, rotating handle 646, rotating driver 65, ceramic rod body 7, electric heating wire 71, ceramic heat transfer insulation layer 72, metal rod 73, metal ring mounting groove 74, copper ring 741, conductive bar mounting groove 75, conductive bar 751, belt body deviation correcting mechanism 8, deviation detection assembly 81, displacement sensor 811, height adjustable assembly 812, height adjusting base 813, height adjusting slot 814, height adjusting rod 815, deviation corrector 82, deviation correcting frame 821, upper pinch roller 822, lower pinch roller 823, clamping degree adjusting assembly 83, clamping degree adjusting block 831, clamping degree adjusting slot 832, clamping degree adjusting rod 833, sliding guide seat 84, slider 841, slide rail 842, electric linear position adjusting cylinder 85, deviation correcting base 86. Detailed implementation mode

[0038] Embodiment 1 like Figures 1 to 11 As shown, a mica roasting kiln for pre-drying using waste heat comprises a furnace body 1 and a transmission mechanism 2. A flat feed port 11 and a flat discharge port 12 are provided on the furnace body 1. The flat feed port 11 and the flat discharge port 12 are connected through a linear channel 13. The linear channel 13 is configured as a pre-drying zone 3 and a roasting zone 4 distributed from the flat feed port 11 to the flat discharge port 12. The flat feed port 11, the linear channel 13 and the flat discharge port 12 are penetrated on the upper side of the annular metal strip 21 of the transmission mechanism 2, and the two ends of the annular metal strip 21 extend respectively. The annular metal strip 21 extends to the outside of the flat feed port 11 and the outside of the flat discharge port 12. A discharge mechanism 5 capable of reducing dust dispersion is provided on the discharge end of the annular metal strip 21. The height between the upper surface of the annular metal strip 21 and the top surface in the pre-drying zone 3 is greater than the height between the top surface in the roasting zone 4 and the upper surface of the annular metal strip 21. The pre-drying zone 3 is provided with a first electric heating unit 31 located below the annular metal strip 21. The roasting zone 4 is provided with a plurality of second electric heating units 41 distributed along the length direction of the annular metal strip 21 and staggered up and down. A dehumidification mechanism 32 is provided at the top of the pre-drying zone 3, and an insulation structure 14 capable of reducing the heat spillover from the first electric heating unit 31 and the second electric heating unit 41 is provided between the furnace body 1 and the flat feed port 11, the linear channel 13 and the flat discharge port 12, and a material breaking mechanism 6 for breaking up a number of bonded mica after pre-drying is provided between the pre-drying zone 3 and the roasting zone 4.

[0039] In this embodiment, the flat feed port 11 and the flat discharge port 12 designed in a flat and narrow shape ensure sufficient feed volume while reducing dust emission. The discharge mechanism 5 that reduces dust emission can fundamentally avoid dust pollution. By setting the dehumidification mechanism 32 at the top of the pre-drying zone 3 with a lower temperature, the heat wasted when discharging moisture can be reduced, and the heat wasted can be reduced by the heat-insulating structure 14, thereby achieving the effect of energy saving. By separately setting the pre-drying zone 3 and the roasting zone 4 with progressive temperatures, and the material body breaking mechanism 6 between the two, a uniform roasting effect can be ensured, thereby improving the quality of the final product.

[0040] More specifically, the pre-drying zone 3 includes a dehumidification zone 1 33 disposed at the top of the pre-drying zone 3, and a dehumidification zone 2 34 is disposed between the dehumidification zone 1 33 and the flat feed port 11 and the pre-drying zone 3, respectively. The distance between the top of the dehumidification zone 1 33 and the upper surface of the annular metal strip 21 is H1, and the distance between the dehumidification zone 2 34 and the upper surface of the annular metal strip 21 is H2, and H1>H2; The distance between the upper surface of the annular metal strip 21 and the top of the flat feed port 11 is H3, and the distance between the upper surface of the annular metal strip 21 and the top of the roasting zone 4 is H4, H3=H4<H2.

[0041] In this embodiment, a transition inclined plane 35 is provided between the top surface of the flat feed inlet 11, the top surface of the roasting area 4 and the top surface of the second moisture discharge area 34 adjacent to their respective ends.

[0042] More specifically, the length of the first moisture discharge area 33 is L1, the length of the second moisture discharge area 34 is L2, and the length of the second electric heating unit 41 is L3. The ratio of H1, H2, H3, L1, L2 to L3 is 5:3:1:16:16:16.

[0043] In this embodiment, the first moisture discharge area 33, the second moisture discharge area 34 and the second heating unit 41 have the same length, and each is 1.6 meters.

[0044] More specifically, the first electric heating unit 31 includes a number of first electric heating rods 311 arranged horizontally along the length direction and disposed below the upper side of the annular metal strip 21; The second electric heating unit 41 includes a number of second electric heating rods 411 arranged horizontally along the length direction of the annular metal strip 21.

[0045] In this embodiment, the first electric heating rod 311 and the second electric heating rod 411 include a ceramic rod body 7, and an electric heating wire 71 is wound around the ceramic rod body 7. The first electric heating rod 311 and the second electric heating rod 411 are not in contact with the upper and lower surfaces of one side of the annular metal strip 21.

[0046] More specifically, the moisture discharge mechanism 32 includes a first moisture discharge hole 321 provided at the top of the first moisture discharge area 33, a second moisture discharge hole 322 is provided at the top of the second moisture discharge area 34. The first moisture discharge hole 321 and the second moisture discharge hole 322 are both connected to the collecting pipe 323, and the second moisture discharge hole 322 is located on both sides of the first moisture discharge hole 321. The collecting pipe 323 is connected to a moisture discharge negative pressure pump through a main negative pressure extraction pipe 324, and the connection end of the main negative pressure extraction pipe 324 and the collecting pipe 323 is close to the first moisture discharge hole 321; An auxiliary negative pressure extraction impeller is provided between the main negative pressure extraction pipe 324 and the collecting pipe 323. The auxiliary negative pressure extraction impeller is connected to an auxiliary motor 325. An auxiliary impeller mounting hole 326 is provided on one side of the collecting pipe 323 away from the main negative pressure extraction pipe 324. The auxiliary impeller mounting hole 326 is closed by an auxiliary motor fixing plate 327, and the auxiliary motor 325 is fixed on the auxiliary motor fixing plate 327.

[0047] In this embodiment, the aperture of the first moisture discharge hole 321 is larger than that of the second moisture discharge hole 322.

[0048] More specifically, the transmission mechanism 2 includes a driving wheel 22 and a driven wheel 23 respectively arranged at the outer ends of the discharge port 12 and the feed port 11. An annular thin metal belt 21 is sleeved on the driving wheel 22 and the driven wheel 23. The driving wheel 22 is connected to a driving wheel driver 221. A number of roller shafts 24 are provided at the bottom of the upper side and the lower side of the annular thin metal belt 21. The roller shafts 24 at the bottom of the upper side of the annular thin metal belt 21 and located inside the furnace body 1 are connected to a roller shaft rotation driving assembly 241. A belt body deviation rectifying mechanism 8 is further provided at the lower side of the annular thin metal belt 21.

[0049] In this embodiment, the heat insulation structure 14 includes a circular heat insulation layer 141 arranged between the linear channel 13 and the furnace body 1. The circular heat insulation layer 141 includes any one or more of refractory bricks, ceramic fibers or coatings. The refractory bricks are silica bricks, high-aluminum bricks, magnesia bricks or zircon corundum bricks.

[0050] Preferably, the refractory bricks are the inner layer, and a heat preservation coating is applied outside the refractory bricks. The inner wall of the exhaust pipe is coated with a flue gas anti-corrosion coating to resist steam corrosion.

[0051] In this embodiment, the roller shaft 24 includes a central shaft 243 located at the central position, and a roller 242 arranged around the central shaft 243 and in direct contact with the annular thin metal belt 21. The central shaft 243 is connected to the roller shaft rotation driving assembly 241. The roller shaft rotation driving assembly 241 includes a roller shaft driving motor. The roller shaft driving motor is connected through a driving transmission member to drive the central shaft 243 to rotate. There are multiple roller shaft driving motors, and several roller shafts 24 share one roller shaft driving motor. The several adjacent roller shafts 24 driven by the same roller shaft driving motor are connected and driven through a passive transmission member.

[0052] As Figure 11 shown, the belt body deviation rectifying mechanism 8 includes a deviation detection assembly 81 arranged at the lower side of the annular thin metal belt 21. The lower side of the annular thin metal belt 21 is threaded through a rectifier 82. The rectifier 82 includes a rectifying frame 821. An upper pinch roller 822 is provided on the rectifying frame 821. Two lower pinch rollers 823 parallel to each other are provided on both sides below the upper pinch roller 822. The upper pinch roller 822 and the lower pinch rollers 823 are rotationally connected to the rectifying frame 821. The lower side of the annular thin metal belt 21 is threaded through between the upper pinch roller 822 and the two lower pinch rollers 823. A clamping degree adjusting assembly 83 is provided between the upper pinch roller 822 and the rectifying frame 821. Slide blocks 841 are respectively provided at both ends of the pinch rollers on the rectifying frame 821. The slide blocks 841 are arranged on two slide rails 842 of a sliding guide seat 84. The slide blocks 841 are rotationally connected to the rectifying frame 821. The central axis of the slide rail 842 is inclined to the central axis of the annular thin metal belt 21 and forms an angle of 45°. An electric linear displacement cylinder 85 is provided between one of the slide blocks 841 and the sliding guide seat 84. The bottom of the sliding guide seat 84 is fixed on a rectifying base 86. The offset detection component 81 includes a displacement sensor 811 disposed on the side of the annular metal strip 21. There is a height adjustment component 812 between the displacement sensor 811 and the offset detection component 81. The height adjustment component 812 includes height adjustment bases 813 fixed at both ends of the deviation rectifying base 86. The height adjustment bases 813 are provided with height adjustment slots 814. The height adjustment slots 814 are provided with height adjustment rods 815. The displacement sensor 811 is disposed on the height adjustment rods 815.

[0053] In this embodiment, the clamping degree adjustment component 83 includes a clamping degree adjustment block 831. The clamping degree adjustment block 831 is disposed in a clamping degree adjustment slot 832 on the deviation rectifying frame 821. The clamping degree adjustment block 831 is provided with a clamping degree adjustment rod 833 passing through the deviation rectifying frame 821 to adjust the position of the clamping degree adjustment block 831 in the clamping degree adjustment slot 832. The rotating shaft of the upper pinch roller 822 is disposed on the clamping degree adjustment block 831.

[0054] In this embodiment, the electric linear displacement cylinder 85 is an electric linear actuator, which can drive the slider 841 to slide linearly along the slide rail 842.

[0055] More specifically, the material dispersion mechanism 6 includes a dispersion roller 61 disposed horizontally above the annular metal strip 21 between the pre-drying zone 3 and the roasting zone 4. The dispersion roller 61 is provided with spiral stirring impellers 62 distributed along its length direction, and the stirring impellers 62 are integrated with the dispersion roller 61. Both ends of the dispersion roller 61 are respectively located on both sides of the annular metal strip 21, and height adjustment mechanisms 64 for adjusting the height of the mica passage gap 63 between the dispersion roller 61 and the annular metal strip 21 are provided at both ends of the dispersion roller 61. One end of the dispersion roller 61 is connected to a rotation drive 65.

[0056] In this embodiment, the rotation drive 65 includes a drive motor. The drive motor is connected to the end of the dispersion roller 61 through a commutator, and the drive motor is fixed on the lifting seat 641 through the commutator. And a bearing is provided between the dispersion roller 61 and the lifting seat 641.

[0057] The height adjustment mechanism 64 includes lifting seats 641 disposed at both ends of the dispersion roller 61. The lifting seats 641 are disposed on height adjustment brackets 642. A rotation drive 65 is fixed on one of the lifting seats 641, and the drive end of the rotation drive 65 is connected to the end of the dispersion roller 61. The height adjustment brackets 642 are fixed on both sides of the furnace body 1 to provide stable support for the entire material dispersion mechanism 6.

[0058] Such as Figure 8As shown, the height adjustment mechanism 64 includes a height adjustment slider 643 disposed on the lifting seat 641. There are two height adjustment sliders 643, which are respectively fixed on the height adjustment slide rails 644 on both sides of the lifting seat 641. An elevating screw 645 is provided on the height adjustment bracket 642, and the lower end of the elevating screw 645 is axially limited in circumferential rotation connection with the lifting seat 641. A rotating handle 646 is provided at the upper end of the elevating screw 645. The height is adjusted by driving the elevating screw 645 through the rotating handle 646. The outer diameter of the rotating handle 646 is much larger than that of the elevating screw 645, and a handle convenient for adjustment is provided at the outer side position of the rotating handle 646.

[0059] In this embodiment, an inverted U-shaped bracket is provided at the upper end of the lifting seat 641. The lower end of the elevating screw 645 is inserted through the inverted U-shaped bracket and is circumferentially movably connected therewith. Fixed nuts are screwed on the elevating screw 645 and are respectively located at both ends of the inverted U-shaped bracket. An active gasket is provided between the fixed nut and the inverted U-shaped bracket. Positioning nuts are screwed on the elevating screw 645 and are located inside and outside the cross bar of the height adjustment bracket 642.

[0060] More specifically, the discharging mechanism 5 includes a C-shaped dust-proof cover 51 provided at one end of the annular metal thin strip 21. Dust-proof side baffles 52 are provided on both sides of the dust-proof cover 51. A collecting box 53 with a top opening 531 is provided at the bottom of the dust-proof cover 51. Two negative pressure discharging ports 532 are respectively provided at both ends of the collecting box 53. The negative pressure discharging ports 532 are connected with a negative pressure material suction assembly. A two-way feeding auger 533 capable of sending mica powder entering from the top opening 531 to the negative pressure discharging ports 532 is provided in the collecting box 53. The two-way feeding auger 533 is connected with an auger driving assembly 534. A dust floating adsorption port 541 extending horizontally in a strip shape is provided at the upper end of the dust-proof cover 51, which can prevent the falling mica powder from rising and floating out. The dust floating adsorption port 541 is connected with a dust floating adsorption assembly 54. An elastic dust-proof strip 55 is provided horizontally in a sheet shape at the top of the dust-proof cover 51. A feeding gap 551 is formed between the elastic dust-proof strip 55 and the annular metal thin strip 21. A material leakage port 511 is provided at the bottom of the dust-proof cover 51. The opening 531 is docked with the material leakage port 511. The dust-proof cover 51 and the collecting box 53 are fixed by a detachable structure 56. The detachable structure 56 includes a first annular fixing seat 561 provided at the material leakage port 511. A second annular fixing seat 562 cooperating with the first annular fixing seat 561 is provided at the opening 531. A number of quick-connect units 563 distributed circumferentially are provided between the first annular fixing seat 561 and the second annular fixing seat 562.

[0061] In this embodiment, to prevent the material from spilling and detaching from both sides of the annular metal thin strip 21, side baffle components can be provided at the two edges of the annular metal thin strip 21. The side baffle components include heat-resistant baffles, and the side baffle components are prior art. The side baffle components can be integrated at the corresponding positions of the loop-shaped heat insulation layer 141, or the loop-shaped heat insulation layer 141 can be directly used for blocking and preventing detachment.

[0062] As Figure 7 shown, a number of position-adjusting rollers 535 are provided at the bottom of the aggregate box 53. The aggregate box 53 includes a strip-shaped box body. Negative pressure discharge ports 532 are respectively provided at both ends of one side of the strip-shaped box body. An external connecting pipe 536 is provided on the negative pressure discharge port 532. The other end of the external connecting pipe 536 is connected to a funnel-shaped transfer pipe through a flange structure. The other end of the transfer pipe is connected to a side port on the side of the straight pipe 537 and is integrated with the straight pipe 537. An inspection port that can be opened and closed is provided at the lower end of the straight pipe 537. The other end of the straight pipe 537 is connected to the aggregate bin.

[0063] In this embodiment, the two-way feeding auger 533 includes an auger rotating shaft that passes through both ends of the aggregate box 53 and is rotatably connected thereto. A rotary sealing structure is provided between the end of the auger rotating shaft and the aggregate box 53. Helical blades are provided on the auger rotating shaft in a centrally symmetric manner. One end of the auger rotating shaft is connected to an auger driving assembly 534 located outside the aggregate box 53. A bearing seat for the auger is provided between the end of the auger rotating shaft and the aggregate box 53. A bearing is provided between the bearing seat for the auger and the auger rotating shaft. A sealing ring is also provided between the end of the auger rotating shaft and the aggregate box 53.

[0064] A strip-shaped auger cavity with a C-shaped cross-section is provided inside the strip-shaped box body. The two-way feeding auger 533 is arranged in the auger cavity. Sloping discharge plates that gradually slope downward from the outside to the inside are provided between both sides of the auger cavity and the opening 531. The quick-connect unit 563 includes a hook ring provided on the first annular fixing seat 561, and a buckle is provided on the second annular fixing seat 562.

[0065] More specifically, between the discharging mechanism 5 and the flat discharging port 12, a number of cooling fans 57 distributed transversely are provided below the upper side of the annular metal thin strip 21. The cooling fans 57 are fixed on the frame 15 of the furnace body 1.

[0066] The working principle of this embodiment is that the annular metal thin strip 21 is arranged on the driving wheel 22 and the driven wheel 23. The driving wheel driver 221 drives the driving wheel 22 to drive the driven wheel 23 together to make the annular metal thin strip 21 rotate in a cycle. At the same time, under the driving action of the roller shaft rotation driving assembly 241, the roller shaft 24 bears the weight of the material on the upper annular metal thin strip 21 and rotates synchronously with the annular metal thin strip 21.

[0067] While the annular thin metal strip 21 rotates, materials are fed into the pre-drying zone 3 from the flat feed inlet 11. The first electric heating rod 311 pre-dries the materials from above the annular thin metal strip 21 below. The crystal water precipitated by drying is pumped out by the main negative pressure extraction pipe 324 and driven by the auxiliary motor 325, and reaches the collecting pipe 323 through the first moisture discharge holes 321 and the second moisture discharge holes 322 respectively, and is finally discharged outside the furnace body 1.

[0068] While extracting moisture, the pre-drying zone 3 also allows the high-temperature gas in the roasting zone 4 to enter the pre-drying zone 3, and pre-dries the materials from above the materials, thereby avoiding waste of heat.

[0069] When the materials are dried in the pre-drying zone 3 and pass through the dispersing roller 61, the dispersing roller 61 is driven to rotate by the rotary drive 65. The aggregated materials are dispersed by the dispersing impeller 62 and evenly laid on the surface of the annular thin metal strip 21. When installing the dispersing roller 61, according to the thickness and caking degree of the material body, the height of the mica passage gap 63 between the dispersing roller 61 and the annular thin metal strip 21 is adjusted by the height adjusting mechanism 64.

[0070] After the materials enter the roasting zone 4, the second electric heating units 41 staggered above and below the upper annular thin metal strip 21 will further heat and roast the materials, so that the crystal water of the materials is further removed. Each second electric heating unit 41 has the same length and includes a number of second electric heating rods 411.

[0071] The roasted materials are sent out of the furnace body 1 through the flat discharge outlet 12. First, they are cooled by the cooling fan 57 from below the upper annular thin metal strip 21. When the materials are transported to the inlet of the dust-proof cover 51, the elastic dust-proof strip 55 evenly spreads the piled materials on the surface of the annular thin metal strip 21. The dust-raising adsorption assembly 54 adsorbs through the dust-raising adsorption port 541 to avoid dust-raising, and the materials smoothly enter the inside of the dust-proof cover 51 through the feed gap 551.

[0072] After entering the inside of the dust-proof cover 51, under the blocking action of the dust-proof side baffle 52, they fall into the aggregate box 53 along the inner curved surface of the C-shaped dust-proof cover 51. By rotating the two-way feeding auger 533, the materials are sent into the negative pressure discharge outlets 532 on both sides and collected into the aggregate bin to complete the blanking operation. At this point, the annular thin metal strip 21 returns to the feeding end from below the furnace body 1 and continues to circulate.

[0073] When it is necessary to repair the inside of the aggregate box 53 or the dust-proof cover 51, the first annular fixing seat 561 and the second annular fixing seat 562 can be separated through the detachable structure 56 for repair. After the repair or cleaning is completed, by aligning the first annular fixing seat 561 and the second annular fixing seat 562 of the material leakage port 511 and the opening 531, and connecting the corresponding quick-connect units 563 one by one, the operation can be continued.

[0074] When the annular metal thin belt 21 is displaced, the displacement sensor 811 will transmit a signal to the deviation rectifier 82, and the deviation rectifier 82 will control the electric linear positioning cylinder 85 to push the slider 841 according to the specific signal. The upper pinch roller 822 and the lower pinch roller 823 that clamp the annular metal thin belt 21 will be offset by an appropriate angle with the annular metal thin belt 21 to perform deviation rectification.

[0075] Embodiment 2 The content of this embodiment is basically the same as that of Embodiment 1, and the difference lies in; as Figure 12 and 13 shown, on the lower surface of the belt body on one side of the annular metal thin belt 21, at the position of the roller 242 in the furnace body in Embodiment 1, a first electric heating rod 311 and a second electric heating rod 411 are correspondingly provided. A ceramic heat transfer insulating layer 72 is coated on this part of the first electric heating rod 311 and the second electric heating rod 411 and is in rolling contact with the lower surface of the annular metal thin belt 21. A reinforcing metal rod 73 is coaxially arranged in the center of the ceramic rod body 7. Both ends of the reinforcing metal rod 73 are respectively connected to the frame 15 through bearing seats 25. A carbon brush fixing seat 251 is provided at the inner end of the bearing seat 25, and a carbon brush 252 is provided on the carbon brush fixing seat 251. A metal ring installation groove 74 is provided on the ceramic rod body 7, and a copper ring 741 is fixed in the metal ring installation groove 74. The copper ring 741 is connected to the end of the electric heating wire 71 through at least one conductive strip 751 extending axially along the ceramic rod body 7 and distributed circumferentially. The conductive strip 751 is embedded in the conductive strip installation groove 75 of the ceramic rod body 7. The conductive strip 751 is integrated with the copper ring 741, and the conductive strip 751 is welded to the end of the electric heating wire 71; The roller shaft rotation drive assembly 241 includes at least two gears 244 provided at one end of the reinforcing metal rod 73. Adjacent reinforcing metal rods 73 are driven by gears 244 and a driven chain 245. The gear 244 of one of the reinforcing metal rods 73 is connected to the active end of the gear driver 246 through an active chain.

[0076] In this application, there are multiple gear drivers 246, and several reinforcing metal rods 73 share one gear driver 246 for driving.

[0077] The working principle of this embodiment is that the first electric heating rod 311 and the second electric heating rod 411 are in rolling contact with the lower surface of the annular metal thin belt 21 through the coated ceramic heat transfer insulating layer 72, playing the role of replacing the roller shaft 24, making the structural design more compact, and the heat can be better conducted to the raw materials, further improving the energy-saving effect.

[0078] Embodiment 3 The content of this embodiment is basically the same as that of Embodiment 1, and the difference lies in; as Figure 14 and 15As shown in the figure, a wind guide cylinder 58 with an inverted concave cross-section is provided between the upper and lower surfaces of the annular thin metal strip 21 and the cooling fan 57. A cooling air outlet 581 is provided at the upper end of the wind guide cylinder 58. An annular seat 59 is provided on the cooling air outlet 581. A number of elastic needle strips 591 made of silicon nitride rubber material for dust prevention are provided on the annular seat 59 along its circumferential direction. The number of elastic needle strips 591 can be deformed and sealed with the upper and lower surfaces of the annular thin metal strip 21. Clamping edges 592 are provided on three adjacent sides of the periphery of the annular seat 59. The clamping edges 592 are embedded in the inner clamping grooves 582 of the cooling air outlet 581. An access opening 583 is provided on one side of the wind guide cylinder 58. The wind guide cylinder 58 and the annular seat 59 are prevented from moving the annular seat 59 out of the access opening 583 through clamping blocks 593 and bolts.

[0079] Cooling fans 57 are respectively provided at both ends of the wind guide cylinder 58. The inner ends of the cooling fans 57 are connected to the isolation plate 584 through inner shock-absorbing rubber seats 571. The inner shock-absorbing rubber seats 571 are fixed on the isolation plate 584 through bolts. The inner ends of the cooling fans 57 are clamped in the inner fan clamping grooves 572 of the inner shock-absorbing rubber seats 571. The outer ends of the cooling fans 57 are fixed on the fan installation openings 585 on the side walls of the wind guide cylinder 58 through outer shock-absorbing rubber seats 573. Outer fan clamping grooves 574 for embedding the outer side walls of the cooling fans 57 are provided at the inner ends of the outer shock-absorbing rubber seats 573. The outer shock-absorbing rubber seats 573 are fixed on the wind guide cylinder 58 through a number of bolts.

[0080] Cold air inlets 586 and hot air outlets 587 are respectively provided between both ends of the wind guide cylinder 58 and their respective cooling fans 57. Wind guiding arc-shaped parts 588 are provided between the cold air inlets 586 and the hot air outlets 587 and the isolation plate 584. One of the cooling fans 57 is responsible for blowing the air drawn from the cold air inlet 586 towards the annular thin metal strip 21, and the other cooling fan 57 is responsible for blowing the air that has exchanged heat after passing through the annular thin metal strip 21 towards the direction of the hot air outlet 587 for discharge; the cold air inlets 586 and the hot air outlets 587 can be exhausted outdoors through pipelines. Further, filtering or cooling equipment can be added to the pipelines.

[0081] The working principle of this embodiment is that through the cold air inlet 586 and the hot air outlet 587, a circulating flow air duct is formed inside the wind guide cylinder 58 to continuously take away the heat from the upper and lower surfaces of the annular thin metal strip 21, thereby achieving a more efficient effect of cooling the roasted materials.

[0082] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar methods for substitution, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A mica roasting kiln using waste heat for pre-drying, characterized in that, The invention comprises a furnace body (1) and a transmission mechanism (2), wherein the furnace body (1) is provided with a flat feed inlet (11) and a flat discharge port (12), wherein the flat feed inlet (11) and the flat discharge port (12) are connected via a linear channel (13), wherein the linear channel (13) is configured as a pre-drying zone (3) and a roasting zone (4) distributed from the flat feed inlet (11) to the flat discharge port (12), wherein the flat feed inlet (11), the linear channel (13) and the flat discharge port (12) are penetrated on the upper side of the annular metal strip (21) of the transmission mechanism (2), and the two ends of the annular metal strip (21) extend to the flat feed inlet, the linear channel (13) and the flat discharge port (12), respectively. The annular metal strip (21) is provided with a discharge mechanism (5) capable of reducing dust dispersion on the discharge end of the annular metal strip (21), the height between the upper surface of the annular metal strip (21) and the top surface of the pre-drying zone (3) is greater than the height between the top surface of the roasting zone (4) and the upper surface of the annular metal strip (21), the pre-drying zone (3) is provided with a first electric heating unit (31) located below the annular metal strip (21), and the roasting zone (4) is provided with a plurality of second electric heating units (41) distributed along the length direction of the annular metal strip (21) and staggered up and down. A dehumidification mechanism (32) is provided at the top of the pre-drying zone (3), and a heat insulation structure (14) capable of reducing heat spillover from the first electric heating unit (31) and the second electric heating unit (41) is provided between the furnace body (1) and the flat feed port (11), the linear channel (13) and the flat discharge port (12). A material dispersing mechanism (6) for dispersing a plurality of laminated mica after pre-drying is provided between the pre-drying zone (3) and the roasting zone (4).

2. The mica roasting kiln using waste heat for pre-drying according to claim 1, characterized in that, The pre-drying zone (3) comprises a dehumidification zone 1 (33) arranged at the top of the pre-drying zone (3), and a dehumidification zone 2 (34) is respectively arranged between the dehumidification zone 1 (33) and the flat feed port (11) and the pre-drying zone (3), the distance between the top of the dehumidification zone 1 (33) and the upper surface of the annular metal strip (21) is H1, the distance between the dehumidification zone 2 (34) and the upper surface of the annular metal strip (21) is H2, and H1>H2; The distance between the upper surface of the annular metal strip (21) and the top of the flat feed port (11) is H3, and the distance between the upper surface of the annular metal strip (21) and the top of the roasting zone (4) is H4, where H3=H4<H2.

3. The mica roasting kiln using waste heat for pre-drying according to claim 2, wherein, The length of the dehumidification zone 1 (33) is L1, the length of the dehumidification zone 2 (34) is L2, the length of the second electric heating unit (41) is L3, and the ratio of H1, H2, H3, L1, L2 and L3 is 5:3:1:16:16:

16.

4. The mica roasting kiln using waste heat for pre-drying according to claim 1, characterized in that, The first electric heating unit (31) comprises a plurality of first electric heating rods (311) which are distributed along the length direction and arranged transversely and are arranged below the upper side of the annular metal strip (21); The described second electric heating unit (41) includes a number of second electric heating rods (411) that are distributed along the length direction of the annular metal thin strip (21) and are arranged transversely.

5. The mica roasting kiln using waste heat for pre-drying according to claim 2, characterized in that, The described moisture exhaust mechanism (32) includes at least one first moisture exhaust hole (321) provided at the top of the first moisture exhaust area (33), a second moisture exhaust hole (322) is provided at the top of the second moisture exhaust area (34), both the first moisture exhaust hole (321) and the second moisture exhaust hole (322) are connected to the collecting pipe (323), and the second moisture exhaust hole (322) is located on both sides of the first moisture exhaust hole (321). The collecting pipe (323) is connected to a moisture exhaust negative pressure extractor through a main negative pressure extraction pipe (324), and the connection end of the main negative pressure extraction pipe (324) and the collecting pipe (323) is close to the first moisture exhaust hole (321). An auxiliary negative pressure extraction impeller is provided between the main negative pressure extraction pipe (324) and the collecting pipe (323), and the auxiliary negative pressure extraction impeller is connected to an auxiliary motor (325). An auxiliary impeller mounting hole (326) is opened on the side of the collecting pipe (323) away from the main negative pressure extraction pipe (324), and the auxiliary impeller mounting hole (326) is closed by an auxiliary motor fixing plate (327), and the auxiliary motor (325) is fixed on the auxiliary motor fixing plate (327).

6. The mica roasting kiln using waste heat for pre-drying according to any one of claims 1-5, characterized in that, The described transmission mechanism (2) includes a driving wheel (22) and a driven wheel (23) respectively provided at the outer ends of the discharge port (12) and the feed port (11). The annular metal thin strip (21) is sleeved on the driving wheel (22) and the driven wheel (23). The driving wheel (22) is connected to a driving wheel driver (221). A number of roller shafts (24) are provided at the bottom of the upper side and the lower side of the annular metal thin strip (21). Some or all of the roller shafts (24) at the bottom of the upper side of the annular metal thin strip (21) are connected to a roller shaft rotation driving assembly (241). A tape body deviation rectifying mechanism (8) is further provided on the lower side of the annular metal thin strip (21).

7. The mica roasting kiln using waste heat for pre-drying according to claim 6, characterized in that, The strip rectifying mechanism (8) includes an offset detection component (81) arranged on the lower side of the annular metal thin strip (21). The lower side of the annular metal thin strip (21) is threaded through a rectifier (82). The rectifier (82) includes a rectifying frame (821). An upper pinch roller (822) is arranged on the rectifying frame (821). Two lower pinch rollers (823) parallel to each other are arranged on both sides below the upper pinch roller (822). The upper pinch roller (822) and the lower pinch rollers (823) are rotationally connected to the rectifying frame (821). The lower side of the annular metal thin strip (21) is threaded through between the upper pinch roller (822) and the two lower pinch rollers (823). A clamping degree adjusting component (83) is arranged between the upper pinch roller (822) and the rectifying frame (821). Sliders (841) are respectively arranged at both ends of the pinch rollers on the rectifying frame (821). The sliders (841) are arranged on two slide rails (842) of a slide guiding seat (84). The sliders (841) are rotationally connected to the rectifying frame (821). The central axis of the slide rail (842) is inclined to the central axis of the annular metal thin strip (21) and the formed included angle is 45°. An electric linear displacement cylinder (85) is arranged between one of the sliders (841) and the slide guiding seat (842). The bottom of the slide guiding seat (84) is fixed on a rectifying base (86). The offset detection component (81) includes at least one displacement sensor (811) arranged on the side of the annular metal thin strip (21). A height adjustable component (812) is arranged between the displacement sensor (811) and the offset detection component (81). The height adjustable component (812) includes height adjusting bases (813) fixed at both ends of the rectifying base (86). A height adjusting slot (814) is arranged on the height adjusting base (813). A height adjusting rod (815) is arranged in the height adjusting slot (814). The displacement sensor (811) is arranged on the height adjusting rod (815).

8. The mica roasting kiln using waste heat for pre-drying according to any one of claims 1-5, characterized in that, The material dispersing mechanism (6) includes a dispersing roller (61) arranged horizontally above the annular metal thin strip (21) between the pre-drying area (3) and the roasting area (4). Helical stirring impellers (62) distributed along the length direction are arranged on the dispersing roller (61). The stirring impellers (62) are integrated with the dispersing roller (61). Both ends of the dispersing roller (61) are respectively located on both sides of the annular metal thin strip (21). Height adjusting mechanisms (64) capable of adjusting the height of the mica passing gap (63) between the dispersing roller (61) and the annular metal thin strip (21) are arranged at both ends of the dispersing roller (61). One end of the dispersing roller (61) is connected to a rotary driver (65).

9. The mica roasting kiln using waste heat for pre-drying according to any one of claims 1-5, characterized in that, The discharge mechanism (5) comprises a C-shaped dust cover (51) arranged at one end of the annular metal strip (21), dust-proof side baffles (52) are arranged on both sides of the dust cover (51), a collection box (53) with a top opening (531) is arranged at the bottom of the dust cover (51), and two negative pressure discharge ports (532) are arranged on the collection box (53) at both ends respectively, the negative pressure discharge ports (532) are connected to the negative pressure suction assembly, a two-way feeding auger (533) is arranged in the collection box (53) and can feed the mica powder entering from the top opening (531) to the negative pressure discharge port (532), the two-way feeding auger (533) is connected to the auger drive assembly (534), and a dust suction port (541) extending in a strip at the upper end of the dust cover (51) and can prevent the falling mica powder from floating up, the dust suction port (541) is arranged at the upper end of the dust cover (51), and the dust suction port (54 1) connected to a dust adsorption component (54), the top of the dust cover (51) is provided with a sheet-shaped elastic dust baffle (55) arranged transversely, and a feeding gap (551) is formed between the elastic dust baffle (55) and the annular metal strip (21); the bottom of the dust cover (51) is provided with a material leakage port (511), the opening (531) is connected to the material leakage port (511), the dust cover (51) and the material collection box (53) are fixed by a detachable structure (56), the detachable structure (56) comprises a first annular fixing seat (561) arranged on the material leakage port (511), the opening (531) is provided with a second annular fixing seat (562) matched with the first annular fixing seat (561), and a plurality of quick-connect units (563) distributed along the circumferential direction are provided between the first annular fixing seat (561) and the second annular fixing seat (562).

10. The mica roasting kiln using waste heat for pre-drying according to claim 9, characterized in that, A plurality of cooling fans (57) distributed laterally are provided between the discharge mechanism (5) and the flat discharge port (12) and are located below the upper side of the annular metal strip (21). The cooling fans (57) are fixed on the frame (15) of the furnace body (1).

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