A spherical alumina preparation system and a preparation method thereof

Abstract

The application discloses a spherical alumina preparation system, which comprises a calcining furnace, a cleaning tank, a filter pressing mechanism, a drying machine and a classifier, the filter pressing mechanism comprises a ring-shaped filter pressing conveying belt, the filter pressing conveying belt is rotatably arranged below a discharging end of the cleaning tank, and the two ends of the filter pressing conveying belt are provided with symmetrically-distributed conveying plates which are attached to each other, a plurality of fixedly-connected filter pressing bottom plates are arranged on the filter pressing conveying belt, one side of each filter pressing bottom plate is provided with a filter pressing main plate which can move back and forth, the two ends of each filter pressing bottom plate and filter pressing main plate are slidably and sealingly connected with the conveying plates, a sealing plate is arranged in the middle of the filter pressing conveying belt, the two ends of the sealing plate are fixedly connected with the conveying plates, and the bottom of the sealing plate is slidably and sealingly connected with the upper ends of the filter pressing bottom plates and filter pressing main plates, and the feeding end of the drying machine is located below the conveying end of the filter pressing conveying belt. The spherical alumina preparation system overcomes the defects of the prior art, has reasonable design, compact structure, high social use value and application prospect.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of alumina preparation, and in particular to a spherical alumina preparation system and a preparation method thereof. BACKGROUND

[0002] Aluminium oxide is an inorganic substance with the chemical formula Al2O3. It is a high-hardness compound with a melting point of 2054°C and a boiling point of 2980°C. It is an ionically bonded crystal that can be ionized at high temperatures and is commonly used in the manufacture of refractory materials.

[0003] Chinese patent CN112607756A discloses a method for preparing spherical alumina for epoxy molding sealant. The method uses aluminum oxide powder with a D50 of 1.5-45 microns and a purity of 99.8% or higher as raw material. The raw material is physically burned at a temperature of 600-1400°C to remove impurities and make it spherical. The material is then washed, pressure-filtered, and microwave-dried. Finally, the mixed machine is used to mix the spherical aluminum oxide powder with a multi-peak distribution. The prepared spherical aluminum oxide powder contains three peaks, showing good flowability, high thermal conductivity, and high strength of the filler in the plastic sealant product. It has higher economic and social benefits and is worth promoting.

[0004] However, the inventors found that the pressure filtration mechanism used in the prior art spherical alumina preparation method is very dry, but the pressure filtration machine is too large in size, which not only has a high cost, but also occupies too much factory space, affecting the construction of the factory building. At the same time, the inventors found that since the particles still need to be sent to the dryer for drying after pressure filtration, the drying degree of pressure filtration is not very high. If a pressure filtration machine is purchased directly, the cost is too high.

[0005] Therefore, in order to reduce the cost and reduce the occupation of factory space, the present application provides a spherical alumina preparation system and a preparation method thereof, with the purpose of achieving more practical value. SUMMARY

[0006] In order to solve the problem of the prior art pressure filtration mechanism, which is very dry, but the pressure filtration machine is too large in size, which not only has a high cost, but also occupies too much factory space, affecting the construction of the factory building, the present application provides a spherical alumina preparation system and a preparation method thereof.

[0007] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0008] The application discloses a spherical alumina preparation system which comprises a calcining furnace for calcining and spheroidizing aluminum oxide powder, a cleaning tank for cleaning the calcined particles, a filter pressing mechanism for filter pressing the cleaned particles, a drying machine for drying the filter-pressed particles and a classifier for classifying the dried particles, wherein the filter pressing mechanism comprises a ring-shaped filter pressing conveying belt which is rotatably arranged below the discharge end of the cleaning tank and is provided with symmetrically distributed conveying plates at both ends of the filter pressing conveying belt; a plurality of filter pressing bottom plates are fixedly connected to the filter pressing conveying belt; a filter pressing main plate is movably arranged at one side of the filter pressing bottom plates; both ends of the filter pressing bottom plates and the filter pressing main plate are slidably and sealingly connected with the conveying plates; a sealing plate is arranged in the middle of the filter pressing conveying belt; both ends of the sealing plate are fixedly connected with the conveying plates; and the bottom of the sealing plate is slidably and sealingly connected with the upper ends of the filter pressing bottom plates and the filter pressing main plate; and the feeding end of the drying machine is located below the conveying end of the filter pressing conveying belt.

[0009] Preferably, symmetrically distributed filter pressing holes are arranged at both sides of the filter pressing main plate; adjusting grooves are arranged on the side walls of the conveying plates below the sealing plate; and first hydraulic rods are fixedly connected in the adjusting grooves and are inserted into the filter pressing holes.

[0010] Preferably, a plurality of reset springs are arranged at one side of the filter pressing bottom plates and are used for automatically restoring the filter pressing main plate to the initial position; symmetrically distributed reset grooves are arranged on the filter pressing main plate and the filter pressing bottom plates; and both ends of the reset springs are fixedly connected with the inner walls of the corresponding reset grooves.

[0011] Preferably, a feeding pipe is arranged at the upper end of the cleaning tank; a rotatable stirring shaft is arranged in the middle of the cleaning tank; a plurality of stirring rods are arranged on the stirring shaft; a cleaning box is fixedly connected to the bottom of the cleaning tank; a cleaning plate is slidably connected in the cleaning box and can move up and down; the bottom of the stirring shaft penetrates through the center of the cleaning box; a reciprocating screw is arranged on the stirring shaft and is used for periodically moving the cleaning plate up and down; a plurality of one-way feeding ports are arranged on the side walls of the cleaning box and are used for feeding materials into the cleaning tank in one direction; a flow guide groove is arranged at the center of the stirring shaft; a plurality of one-way discharging ports are arranged on the stirring shaft and are connected with the flow guide groove and are used for discharging materials in one direction; and a circulation groove is arranged in the stirring rod and is connected with the flow guide groove; and a plurality of circulation holes are arranged on the stirring rod and are connected with the circulation groove.

[0012] Preferably, a discharge pipe is arranged at the bottom of the cleaning tank and is arranged directly above the conveying end of the filter pressing conveying belt; the discharge pipe is connected with the bottom of the stirring shaft and is connected with the flow guide groove; and a valve mechanism is arranged in the discharge pipe and can be opened and closed.

[0013] Preferably, the valve mechanism comprises a valve plate fixedly installed in the flow guide groove and located below the one-way discharge port, the discharge pipe is movably arranged below the stirring shaft, one side of the valve plate is provided with a through communication groove, the communication groove is provided with a sealing plate movably arranged and used for selectively sealing the communication groove, and the bottom of the sealing plate is connected with the fixed rod.

[0014] Preferably, the bottom of the stirring shaft is provided with a limiting ring groove in a polygonal prism shape, the limiting ring groove is provided with a limiting ring plate slidably and sealingly connected, the bottom of the limiting ring plate is fixedly connected with the discharge pipe, and the bottom of the cleaning tank is provided with a plurality of second hydraulic rods fixedly connected and used for driving the discharge pipe to move up and down.

[0015] Preferably, the outer side of the discharge pipe is provided with a connecting ring groove in a circular ring shape, the connecting ring groove is in a convex cross section, and the connecting ring groove is provided with a connecting ring plate slidably connected, and the end of the second hydraulic rod is fixedly connected with the connecting ring plate.

[0016] Preferably, the other side of the filter press bottom plate is provided with a recovery groove in an L-shaped cross section, the recovery groove is provided with a scraper slidably connected, the side wall of the conveying plate is provided with a positioning ring groove in an annular shape, the both ends of the scraper are provided with positioning rods fixedly connected and slidably connected in the positioning ring groove, the bottom of the scraper is provided with a plurality of scraping rods fixedly connected, the upper end of the scraper is provided with a limiting groove in a convex cross section, the limiting groove is provided with a limiting block slidably connected, the upper end of the limiting block is provided with a limiting rod fixedly connected, the discharge pipe is provided with an adjusting plate fixedly connected, and the adjusting plate is provided with an adjusting hole used for inserting the limiting rod.

[0017] Preferably, the bottom of the conveying plate is provided with a guide plate fixedly connected and used for guiding the liquid after the filter pressing, and the conveying end of the filter press conveying belt is provided with a plurality of cams rotatable and used for knocking the filter press conveying belt.

[0018] A method for preparing spherical alumina, comprising the following steps:

[0019] S1, selecting aluminum oxide powder with a particle size D50 of 1.5-45 μm and a purity of 99.8% or above, and sending it into a calcining furnace at a temperature of 600-1400℃ for calcination, removing impurities in the raw material by flame melting and spheroidizing;

[0020] S2, the calcined particles are sent into the cleaning tank through the feeding pipe, the cleaning tank is injected with a cleaning liquid, and the cleaning motor on the cleaning tank is started to drive the stirring shaft to rotate, so that the stirring rod stirs and cleans the particles; during the stirring process of the stirring shaft, the cleaning plate is driven by the reciprocating thread to move up and down periodically, and the one-way feeding port and the one-way discharging port are matched, so that the particles at the bottom can be sucked into the stirring rod through the cleaning tank, and then flow out through the circulation holes, so that the particles are internally circulated in the cleaning tank, and the particles can be cleaned more thoroughly and efficiently;

[0021] S3, after the cleaning is completed, the rotation of the stirring shaft is controlled so that the adjusting hole is located directly above the limiting rod, and then the second hydraulic rod is started to drive the discharge pipe to move downward, so that the limiting rod is inserted into the adjusting hole; at this time, the sealing plate is separated from the communication groove, the discharge pipe is communicated with the flow guide groove, and then the cleaning motor is started again to drive the stirring shaft to rotate, so that the cleaning tank can convey the particles in the cleaning tank into the discharge pipe, and then discharge them onto the corresponding filter pressing conveying belt through the discharge pipe;

[0022] S4, the particles are accumulated on the filter pressing conveying belt, and as the stirring shaft rotates, the adjusting plate can be driven to rotate synchronously, so that the adjusting plate can drive the scraper to move reciprocally between the adjacent two filter pressing bottom plates, and the particles can be evenly laid on the filter pressing conveying belt between the adjacent two filter pressing bottom plates through the scraper and the scraping rod;

[0023] S5, when the laying is completed, the cleaning motor is controlled to rotate the adjusting plate to the initial position, at this time the scraper automatically moves to the initial position, then the second hydraulic rod is started to drive the discharge pipe to automatically recover, so that the adjusting hole is separated from the limiting rod, and at the same time the sealing plate seals the communication groove, and the particles realize single-quantitative discharging;

[0024] S6, when the laying is completed, the conveying motor is started to drive the filter pressing conveying belt to move, so that the laid particles move a certain distance on the conveying plate, and the next to be laid filter pressing conveying belt moves again below the discharge pipe to wait for discharging;

[0025] S7, when the laid particles move below the sealing plate, the first hydraulic rod is started to insert into the corresponding filter pressing hole, at this time, as the filter pressing conveying belt rotates, the first hydraulic rod can drive the filter pressing main plate to move towards the filter pressing bottom plate on one side, and as the conveying plate is in sliding and sealing connection with the filter pressing main plate, the filter pressing bottom plate and the filter pressing conveying belt, the filter pressing main plate filters the laid particles, and after the filtering is completed, the first hydraulic rod is started to automatically retract, at this time the filter pressing main plate automatically returns to the initial position due to the elasticity of the return spring, so that the automatic retraction of the filter pressing main plate after filtering is realized, without affecting the overall conveying;

[0026] S8, after the completion of filter pressing, the particles move to the output end with the filter pressing conveying belt, the particles are automatically separated from the filter pressing conveying belt due to gravity and the knocking of the cam, and fall into the dryer for automatic drying, and then the dried particles are sent into the classifier for screening; spherical alumina can be obtained.

[0027] Compared with the prior art, the beneficial effects of the present application are:

[0028] 1. The filter pressing bottom plate, the filter pressing main plate and the sealing plate are arranged on the filter pressing conveying belt, a cavity for storing particles can be formed between adjacent filter pressing bottom plates, so that the particles can be better distributed on the filter pressing conveying belt, and the sealing plate can form a cavity for filter pressing with the filter pressing conveying belt when the filter pressing bottom plate moves to the bottom of the sealing plate, at this time, only the movement of the filter pressing main plate is needed to drive the filter pressing main plate to automatically filter the particles in the cavity, so that the filter pressing conveying belt can complete the filter pressing operation during conveying, such design can ingeniously combine the two steps of conveying and filter pressing, reduce the occupied space of the equipment, improve the overall production efficiency and reduce the cost; and the periodic movement of the filter pressing conveying belt can make the cavity periodically move to the discharge end of the cleaning tank to collect the particles, realizing the automatic operation of circulation and reciprocation.

[0029] 2. The design of the filter pressing hole and the first hydraulic rod can utilize the elongation of the first hydraulic rod to insert the first hydraulic rod into the filter pressing hole, so that the filter pressing main plate is connected and fixed with the conveying plate, at this time, the filter pressing bottom plate can automatically move towards the filter pressing main plate with the rotation of the filter pressing conveying belt, and the force generated during the conveying process of the filter pressing conveying belt can drive the filter pressing bottom plate to move towards the filter pressing main plate, realizing the automatic filter pressing process.

[0030] 3. During the stirring process of the stirring shaft, the cleaning plate can be periodically moved up and down through the reciprocating thread, and the particles at the bottom can be sucked into the stirring rod through the cleaning tank and then flow out through the circulating hole, so that the particles can be internally circulated in the cleaning tank, and the particles can be more thoroughly and efficiently cleaned.

[0031] 4. The design of the positioning ring groove can keep the distance between the scraper and the filter pressing conveying belt unchanged, and the scraper can keep a distance to move back and forth, and the design of the limiting rod, the adjusting plate, the adjusting hole and the limiting groove scraper rod can drive the adjusting plate to rotate with the rotating discharge pipe, so that the limiting rod moves in the limiting groove scraper rod, and the scraper can be pulled to move with the adjusting plate, and simultaneously periodically move back and forth, so that the scraper can automatically lay the particles on the filter pressing conveying belt; the particles are more evenly distributed, more particles can be stored at a time, which is convenient for subsequent filter pressing and improves the filter pressing efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only show some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.

[0033] Figure 1 It is a perspective view of the cleaning tank, the filter press mechanism and the drying machine of the present application.

[0034] Figure 2 It is a perspective view of the internal structure of the cleaning tank of the present application.

[0035] Figure 3 It is a sectional view of the cleaning tank and the filter press mechanism of the present application.

[0036] Figure 4 It is a sectional view of the cleaning tank and the discharge pipe of the present application.

[0037] Figure 5 It is a perspective view of the stirring shaft and the adjusting plate of the present application.

[0038] Figure 6 It is a perspective view of the filter press mechanism of the present application.

[0039] Figure 7 It is a perspective view of the filter press main plate and the filter press bottom plate of the present application.

[0040] Figure 8 It is a perspective view of the filter press main plate after being separated of the present application.

[0041] In the drawings: 1, cleaning tank; 11, cleaning motor; 12, feeding pipe; 13, stirring shaft; 131, circulating hole; 132, stirring rod; 133, flow guide groove; 134, reciprocating thread; 135, one-way discharge port; 14, cleaning tank; 141, cleaning plate; 142, one-way feeding port; 15, adjusting plate; 151, adjusting hole; 16, discharge pipe; 161, fixed rod; 162, limiting ring groove; 163, second hydraulic rod; 164, limiting ring plate; 165, valve plate; 166, sealing plate; 2, filter press conveying belt; 21, sealing plate; 22, conveying plate; 231, filter press main plate; 232, filter press bottom plate; 233, scraper; 2332, limiting groove; 2333, limiting block; 234, reset groove; 235, filter press hole; 236, limiting rod; 237, positioning rod; 238, reset spring; 24, positioning ring groove; 25, first hydraulic rod; 26, cam; 261, knocking shaft; 27, flow guide plate; 28, conveying roller; 3, drying machine. DETAILED DESCRIPTION

[0042] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0043] Embodiment 1

[0044] With reference to Figures 1-4 A spherical alumina preparation system, comprising a calcination furnace for calcining and spheroidizing aluminum oxide powder, a cleaning tank 1 for cleaning the particles after calcination, a pressure filtration mechanism for pressure filtration of the particles after cleaning, a drying machine 3 for drying the particles after pressure filtration, and a classifier for screening the particles after drying, the pressure filtration mechanism comprising a ring-shaped pressure filtration conveying belt 2, the pressure filtration conveying belt 2 being rotatably arranged below the discharge end of the cleaning tank 1, and the pressure filtration conveying belt 2 being provided with symmetrically distributed conveying plates 22 at both ends, the pressure filtration conveying belt 2 being provided with a plurality of fixedly connected pressure filtration bottom plates 232, one side of the pressure filtration bottom plate 232 being provided with a pressure filtration main plate 231 capable of moving back and forth, both ends of the pressure filtration bottom plate 232 and the pressure filtration main plate 231 being slidably and sealingly connected with the conveying plates 22, the pressure filtration conveying belt 2 being provided with a sealing plate 21 in the middle, both ends of the sealing plate 21 being fixedly connected with the conveying plates 22, and the bottom of the sealing plate 21 being slidably and sealingly connected with the upper ends of the pressure filtration bottom plate 232 and the pressure filtration main plate 231, the drying machine 3 being arranged below the conveying end of the pressure filtration conveying belt 2. Wherein, the conveying plates 22 are provided with fixedly connected supports on both sides for supporting, the pressure filtration conveying belt 2 is provided with symmetrically distributed conveying rollers 28, the conveying rollers 28 are rotatably connected with the conveying plates 22, and the conveying plates 22 are provided with a conveying motor connected with one of the conveying rollers 28 and driving the pressure filtration conveying belt 2 to rotate.

[0045] The filter pressing base plate 232, the filter pressing main plate 231 and the sealing plate 21 are arranged on the filter pressing conveying belt 2, a cavity for storing particles can be formed between adjacent filter pressing base plates 232, so that the particles can be better distributed on the filter pressing conveying belt 2, and the sealing plate 21 can cooperate with the filter pressing conveying belt 2 to form a cavity for filter pressing when the filter pressing base plate 232 moves to the bottom of the sealing plate 21, at this time, only the movement of the filter pressing main plate 231 can drive the filter pressing main plate 231 to automatically filter the particles in the cavity, so that the filter pressing conveying belt 2 can complete the filter pressing operation during conveying, and such a design can ingeniously combine the two steps of conveying and filter pressing, reduce the occupied space of the equipment, and improve the overall production efficiency; and the periodic movement of the filter pressing conveying belt 2 can make the cavity periodically move to the discharge end of the cleaning tank 1 to collect the particles, realizing the automatic operation of circulation and reciprocation.

[0046] In the embodiment, with reference to Figures 6-8 , the filter pressing main plate 231 is provided with symmetrically distributed filter pressing holes 235 on both sides, the adjusting groove is arranged on the side wall of the conveying plate 22 below the sealing plate 21, and the first hydraulic rod 25 is arranged in the adjusting groove and used for being inserted into the filter pressing hole 235.

[0047] The filter pressing hole 235 and the first hydraulic rod 25 can be used to make the filter pressing main plate 231 and the conveying plate 22 connected and fixed by inserting the first hydraulic rod 25 into the filter pressing hole 235 through the elongation of the first hydraulic rod 25, at this time, the filter pressing base plate 232 can automatically move towards the filter pressing main plate 231 with the rotation of the filter pressing conveying belt 2, and the filter pressing base plate 232 is driven to move towards the filter pressing main plate 231 by using the force generated in the conveying process of the filter pressing conveying belt 2, so that the automatic filter pressing process is realized.

[0048] In the embodiment, with reference to Figure 8 , the filter pressing base plate is provided with a plurality of reset springs 238 for driving the filter pressing main plate 231 to automatically restore the initial position, the filter pressing main plate 231 and the filter pressing base plate 232 are provided with symmetrically distributed reset grooves 234, and the two ends of the reset spring 238 are fixedly connected with the inner walls of the corresponding reset grooves 234. The reset groove 234 and the reset spring 238 can make the first hydraulic rod 25 separated from the filter pressing hole 235, and the elasticity of the reset spring 238 can drive the filter pressing main plate 231 to automatically restore the initial position, so as to pave the way for subsequent circulation.

[0049] In the embodiment, with reference to Figures 1-4The upper end of the cleaning tank 1 is provided with a feeding pipe 12, the middle part of the cleaning tank 1 is provided with a rotatable stirring shaft 13, a plurality of stirring rods 132 are arranged on the stirring shaft 13, the bottom of the cleaning tank 1 is provided with a fixedly connected cleaning box 14, the cleaning box 14 is internally provided with a slidingly connected and up-and-down movable cleaning plate 141, the bottom of the stirring shaft 13 penetrates through the center of the cleaning box 14, the stirring shaft 13 is movably and sealingly connected with the cleaning box 14, and a reciprocating thread 134 for periodically driving the cleaning plate 141 to move up and down is arranged on the stirring shaft 13, a plurality of one-way feeding ports 142 for allowing the material to enter the cleaning box 14 in one direction are arranged on the side wall of the cleaning box 14, a flow guide groove 133 is arranged at the center of the stirring shaft 13, and a plurality of one-way discharge ports 135 for allowing the material to discharge in one direction and communicated with the flow guide groove 133 are arranged on the stirring shaft 13, and a circulating groove communicated with the flow guide groove 133 is arranged in the stirring rod 132, and a plurality of circulating holes 131 communicated with the circulating groove are arranged on the stirring rod 132.

[0050] During the stirring process of the stirring shaft 13, the cleaning plate 141 is periodically driven to move up and down by the reciprocating thread 134, and the one-way feeding port 142 and the one-way discharge port 135 are matched, so that the particles at the bottom can be sucked into the stirring rod 132 through the cleaning box 14, and then flow out through the circulating hole 131, so that the particles are internally circulated in the cleaning tank 1, and the particles can be more thoroughly and efficiently cleaned.

[0051] As a feasible implementation manner, referring to Figures 1-4 The bottom of the cleaning tank 1 is provided with a discharging pipe 16, the discharging pipe 16 is arranged directly above the conveying end of the filter pressing conveying belt 2, the discharging pipe 16 is connected with the bottom of the stirring shaft 13, and the discharging pipe 16 is communicated with the flow guide groove 133, a valve mechanism capable of being opened and closed is arranged in the discharging pipe 16, the valve mechanism comprises a valve plate 165, the valve plate 165 is fixedly installed in the flow guide groove 133, and the valve plate 165 is located below the one-way discharge port 135, the discharging pipe 16 is movably arranged below the stirring shaft 13, one side of the valve plate 165 is provided with a through-type communication groove, the communication groove is provided with a sealing plate 166 capable of moving up and down and used for selectively sealing the communication groove, and a fixed rod 161 connected between the bottom of the sealing plate 166 and the inner wall of the discharging pipe 16.

[0052] The design of the valve plate 165 and the sealing plate 166 can drive the sealing plate 166 to move up and down by the up-and-down movement of the discharging pipe 16, so as to realize the selective sealing of the flow guide groove 133, when cleaning is needed, the sealing plate 166 is only needed to be moved into the communication groove, at this time, the particles can be sprayed out through the circulating hole 131 to realize internal circulation, and when the sealing plate 166 moves downward and is separated from the communication groove, at this time, due to gravity and pressure, the particles can automatically enter the discharging pipe 16 through the communication groove to realize automatic discharging.

[0053] In this embodiment, refer to Figure 4 The bottom of the stirring shaft 13 is provided with a limiting ring groove 162, which is in the shape of a polygonal prism. A limiting ring plate 164 is provided in the limiting ring groove 162 and is slidably and sealingly connected. The bottom of the limiting ring plate 164 is fixedly connected to the discharge pipe 16. The bottom of the cleaning tank 1 is provided with a plurality of fixedly connected second hydraulic rods 163 for driving the discharge pipe 16 to move up and down.

[0054] The prismatic design of the limiting ring groove 162 allows the discharge pipe 16 to move up and down while simultaneously rotating with the stirring shaft.

[0055] In this embodiment, the outer side of the discharge pipe 16 is provided with a circular connecting ring groove, the connecting ring groove has a convex cross section, and a sliding connecting ring plate is provided inside the connecting ring groove, and the end of the second hydraulic rod 163 is fixedly connected to the connecting ring plate.

[0056] In this embodiment, refer to Figures 4-5 The filter press base plate 232 has an L-shaped recovery trough on its other side, and a slidably connected scraper 233 is provided in the recovery trough. The sidewalls of the conveying plate 22 are each provided with annular positioning grooves 24. The scraper 233 has positioning rods 237 fixedly connected and slidably connected to the positioning grooves 24 at both ends. The bottom of the scraper 233 has multiple fixedly connected scraper rods 2331, and the upper end of the scraper 233 has a convex-shaped limiting groove 2332. A limiting block 2333 is slidably connected in the limiting groove 2332, and a limiting rod 236 is fixedly connected to the upper end of the limiting block 2333. An adjusting plate 15 is fixedly connected to the discharge pipe 16, and the adjusting plate 15 has an adjusting hole 151 for inserting the limiting rod 236. The filter press base plate 232 and the filter press main plate 231 are at the same height, and the upper end of the limiting rod 236 is lower than the height of the upper surface of the filter press main plate 231.

[0057] The design of the positioning ring groove 24 ensures that the scraper 233 maintains a constant distance from the filter press conveyor belt 2 and allows the scraper 233 to move back and forth at this distance. The design of the limiting rod 236, adjusting plate 15, adjusting hole 151, and limiting groove 2332 allows the rotating discharge pipe 16 to drive the adjusting plate 15 to rotate, thereby causing the limiting rod 236 to move in the limiting groove 2332. At the same time, it can also pull the scraper 233 to move back and forth synchronously and periodically with the movement of the adjusting plate 15. This allows the scraper 233 to automatically spread the particles on the filter press conveyor belt 2, making the particle distribution more uniform, storing more particles at a time, facilitating subsequent filtration, and improving filtration efficiency.

[0058] In this embodiment, refer toFigure 4 The bottom of the conveying plate 22 is provided with a fixedly connected and liquid flow guiding plate 27 for guiding the flow of liquid after pressure filtration, and the conveying end of the pressure filtration conveying belt 2 is provided with a plurality of rotatable cams 26 for knocking the pressure filtration conveying belt 2. Among them, a plurality of rotatingly connected knocking shafts 261 are arranged between the conveying plates 22, the cams 26 are fixedly installed on the knocking shafts 261, the adjacent knocking shafts 261 are provided with a connected synchronous chain, and the knocking shafts 261 are connected with the conveying motor through the synchronous chain.

[0059] A method for preparing spherical alumina, comprising the following steps:

[0060] S1, selecting aluminum oxide powder with a particle size D50 of 1.5-45 μm and a purity of 99.8% or higher, and feeding it into a calcining furnace at a temperature of 600-1400°C for calcination, removing impurities in the raw material by flame melting and spheroidizing it;

[0061] S2, the calcined particles are sent into the cleaning tank 1 through the feeding pipe 12, and the cleaning tank 1 is filled with cleaning liquid, and the cleaning motor 11 on the cleaning tank 1 is started to drive the stirring shaft 13 to rotate, so that the stirring rod 132 stirs and cleans the particles; during the stirring process of the stirring shaft 13, the cleaning plate 141 is periodically moved up and down by the reciprocating thread 134, cooperates with the one-way feeding port 142 and the one-way discharging port 135, and can suck the particles at the bottom to the stirring rod 132 through the cleaning box 14, and then flow out through the circulation hole 131, so that the particles are internally circulated in the cleaning tank 1, and the particles can be cleaned more thoroughly and efficiently;

[0062] S3, after cleaning, control the rotation of the stirring shaft 13 to make the adjusting hole 151 located directly above the limiting rod 236, then start the second hydraulic rod 163 to drive the discharge pipe 16 to move downward, so that the limiting rod 236 is inserted into the adjusting hole 151, at this time, the sealing plate 166 is separated from the communication groove, the discharge pipe 16 is communicated with the flow guide groove 133, then the cleaning motor 11 is started again to drive the stirring shaft 13 to rotate, so that the cleaning box 14 can convey the particles in the cleaning tank 1 to the discharge pipe 16, and then discharge to the corresponding pressure filtration conveying belt 2 through the discharge pipe 16;

[0063] S4, the particles are accumulated on the pressure filtration conveying belt 2, and with the rotation of the stirring shaft 13, the adjusting plate 15 can be driven to rotate synchronously, so that the adjusting plate 15 can drive the scraper 233 to periodically reciprocate between the adjacent two pressure filtration bottom plates 232, and the particles can be evenly laid on the pressure filtration conveying belt 2 between the adjacent two pressure filtration bottom plates 232 through the scraper 233 and the scraper rod 2331;

[0064] S5, when the laying is full, the control cleaning motor 11 is started, the adjusting plate 15 is rotated to the initial position, the scraper plate 233 is automatically moved to the initial position, then the second hydraulic rod 163 is started, the discharge pipe 16 is automatically recovered, the adjusting hole 151 is separated from the limiting rod 236, at the same time, the sealing plate 166 seals the communication groove, and the granules realize single-time quantitative discharge;

[0065] S6, when the laying is completed, the conveying motor is started, the filter pressing conveying belt 2 is moved, the laid granules are moved on the conveying plate 22 for a set distance, and the next filter pressing conveying belt 2 to be laid is moved to below the discharge pipe 16 again to wait for discharge;

[0066] S7, when the laid granules are moved to below the sealing plate 21, the first hydraulic rod 25 is started, the first hydraulic rod 25 is inserted into the corresponding filter pressing hole 235, at this time, with the rotation of the filter pressing conveying belt 2, the first hydraulic rod 25 can drive the filter pressing main plate 231 to move towards the filter pressing bottom plate 232 on one side, due to the sliding and sealed connection between the conveying plate 22 and the filter pressing main plate 231, the filter pressing bottom plate 232 and the filter pressing conveying belt 2, the filter pressing main plate 231 filters the laid granules, after the filter pressing is completed, the first hydraulic rod 25 is automatically retracted, at this time, the filter pressing main plate 231 automatically recovers to the initial position due to the elasticity of the reset spring 238, the automatic retraction of the filter pressing main plate 231 after the filter pressing does not affect the overall conveying;

[0067] S8, after the filter pressing is completed, the granules are moved to the output end with the filter pressing conveying belt 2, the granules are automatically separated from the filter pressing conveying belt 2 due to gravity and the knocking of the cam 26, and fall into the drying machine 3 for automatic drying, then the dried granules are sent into the classifier for screening, and spherical alumina is obtained.

[0068] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0069] In this application, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connect", "fix" and other terms should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, it can be directly connected, or indirectly connected through intermediate medium, it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0070] The control mode of the application is automatically controlled by the controller. The control circuit of the controller can be realized by simple programming by those skilled in the art. The power supply also belongs to the common knowledge in the art, and the application is mainly used to protect the mechanical device, so the control mode and circuit connection of the application will not be explained in detail.

[0071] The above is only the preferred specific embodiment of the application, but the protection scope of the application is not limited to this. Any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the application within the technical range disclosed by the application, which should be covered within the protection scope of the application.

Claims

1. A spherical alumina preparation system, characterized in that: The system includes a calcining furnace for calcining and spheroidizing alumina powder, a washing tank (1) for washing the calcined particles, a filter press mechanism for pressing the washed particles, a dryer (3) for drying the filtered particles, and a classifier for screening the dried particles. The filter press mechanism includes a ring-shaped filter press conveyor belt (2), which is rotatably positioned below the discharge end of the washing tank (1). Both ends of the filter press conveyor belt (2) are fitted together and symmetrically distributed with conveyor plates (22). The filter press conveyor belt (2) has multiple fixedly connected filter press bottom plates (...). 232), the filter press base plate (232) is provided with a filter press main plate (231) that can move back and forth on one side. Both ends of the filter press base plate (232) and the filter press main plate (231) are slidably and sealedly connected to the conveyor plate (22). The filter press conveyor belt (2) is provided with a sealing plate (21) in the middle. Both ends of the sealing plate (21) are fixedly connected to the conveyor plate (22), and the bottom of the sealing plate (21) is slidably and sealedly connected to the upper end of the filter press base plate (232) and the filter press main plate (231). The feed end of the dryer (3) is located below the conveying end of the filter press conveyor belt (2). The filter press main plate (231) has symmetrically distributed filter press holes (235) on both sides. The side wall of the conveying plate (22) located below the sealing plate (21) is provided with an adjustment groove. The adjustment groove is provided with a first hydraulic rod (25) that is fixedly connected and used to be inserted into the filter press hole (235).

2. The spherical alumina preparation system according to claim 1, characterized in that: The filter press base plate (232) is provided with a plurality of reset springs (238) on one side for driving the filter press main plate (231) to automatically return to the initial position. Both the filter press main plate (231) and the filter press base plate (232) are provided with symmetrically distributed reset grooves (234). The two ends of the reset springs (238) are respectively fixedly connected to the inner wall of the corresponding reset grooves (234).

3. The spherical alumina preparation system according to claim 1, characterized in that: The cleaning tank (1) is provided with a feed pipe (12) at the upper end and a rotatable stirring shaft (13) in the middle. The stirring shaft (13) is provided with multiple stirring rods (132). The bottom of the cleaning tank (1) is provided with a fixedly connected cleaning box (14). The cleaning box (14) is provided with a slidingly connected and vertically movable cleaning plate (141). The bottom of the stirring shaft (13) passes through the center of the cleaning box (14), and the stirring shaft (13) is provided with a reciprocating screw for driving the cleaning plate (141) to move up and down periodically. The cleaning tank (14) has multiple one-way feed ports (142) on its side wall for materials to enter the cleaning tank (14) in one direction. The stirring shaft (13) has a guide groove (133) at its center and multiple one-way discharge ports (135) on its stirring shaft (13) that are connected to the guide groove (133) and for materials to be discharged in one direction. The stirring rod (132) has a circulation groove connected to the guide groove (133) and multiple circulation holes (131) on its stirring rod (132) that are connected to the circulation groove.

4. The spherical alumina preparation system according to claim 3, characterized in that: The bottom of the cleaning tank (1) is provided with a discharge pipe (16), which is located directly above the conveying end of the filter press conveyor belt (2). The discharge pipe (16) is connected to the bottom of the stirring shaft (13) and is connected to the guide groove (133). The discharge pipe (16) is provided with an openable valve mechanism.

5. The spherical alumina preparation system according to claim 4, characterized in that: The valve mechanism includes a valve plate (165), which is fixedly installed in the guide groove (133) and located below the one-way discharge port (135). The discharge pipe (16) is arranged below the stirring shaft (13) and can move up and down. A through-type connecting groove is provided on one side of the valve plate (165). A sealing plate (166) that can move up and down and is used for selective sealing of the connecting groove is provided in the connecting groove. A fixing rod (161) is provided between the bottom of the sealing plate (166) and the inner wall of the discharge pipe (16).

6. The spherical alumina preparation system according to claim 5, characterized in that: The bottom of the stirring shaft (13) is provided with a limiting ring groove (162), which is in the shape of a polygonal prism. The limiting ring groove (162) is provided with a sliding and sealed limiting ring plate (164) inside the limiting ring groove (162). The bottom of the limiting ring plate (164) is fixedly connected to the discharge pipe (16). The bottom of the cleaning tank (1) is provided with multiple fixedly connected second hydraulic rods (163) for driving the discharge pipe (16) to move up and down.

7. The spherical alumina preparation system according to claim 5, characterized in that: The filter press bottom plate (232) has an L-shaped recovery trough on the other side. The recovery trough is equipped with a slidably connected scraper (233). The side wall of the conveying plate (22) is equipped with an annular positioning groove (24). The scraper (233) has a positioning rod (237) fixedly connected and slidably connected in the positioning groove (24) at both ends. The scraper (233) has multiple fixedly connected scraper rods (2331) at the bottom. The scraper (233) has a convex-shaped limiting groove (2332) at the upper end. The limiting groove (2332) is equipped with a slidably connected limiting block (2333). The limiting block (2333) has a fixedly connected limiting rod (236) at the upper end. The discharge pipe (16) is equipped with a fixedly connected adjusting plate (15). The adjusting plate (15) is equipped with an adjusting hole (151) for the insertion of the limiting rod (236).

8. The spherical alumina preparation system according to claim 4, characterized in that: The bottom of the conveyor plate (22) is provided with a guide plate (27) that is fixedly connected and used for guiding the liquid after filtration. The conveying end of the filter press conveyor belt (2) is provided with multiple rotatable cams (26) for striking the filter press conveyor belt (2).

9. A method for preparing spherical alumina as described in any one of claims 1-8, characterized in that, Includes the following steps: S1. Select aluminum oxide powder with a particle size D50 of 1.5-45μm and a purity of 99.8% or higher, and calcine it in a calcining furnace at a temperature of 600-1400℃. Remove impurities from the raw material by flame melting and make it spherical. S2. The calcined granules are fed into the cleaning tank (1) through the feed pipe (12), and the cleaning liquid is injected into the cleaning tank (1). At the same time, the cleaning motor (11) on the cleaning tank (1) is started, which drives the stirring shaft (13) to rotate, so that the stirring rod (132) stirs and cleans the granules. During the stirring process, the stirring shaft (13) drives the cleaning plate (141) to move up and down periodically through the reciprocating thread (134). With the help of the one-way feed port (142) and the one-way discharge port (135), the granules at the bottom can be sucked into the stirring rod (132) through the cleaning box (14) and then flowed out through the circulation hole (131), so that the granules can circulate in the cleaning tank (1), and the granules can be cleaned more thoroughly and efficiently. S3. After cleaning, control the rotation of the stirring shaft (13) so that the adjustment hole (151) is directly above the limit rod (236). Then start the second hydraulic rod (163) to drive the discharge pipe (16) downward so that the limit rod (236) is inserted into the adjustment hole (151). At this time, the sealing plate (166) is separated from the connecting groove, and the discharge pipe (16) is connected to the guide groove (133). Then start the cleaning motor (11) again to drive the stirring shaft (13) to rotate so that the cleaning tank (14) can transport the particles in the cleaning tank (1) to the discharge pipe (16) and discharge them to the corresponding filter press conveyor belt (2) through the discharge pipe (16). S4. The particles accumulate on the filter press conveyor belt (2). As the stirring shaft (13) rotates, it can drive the adjusting plate (15) to rotate synchronously, so that the adjusting plate (15) can drive the scraper (233) to move back and forth periodically between two adjacent filter press bottom plates (232). The particles can be evenly spread on the filter press conveyor belt (2) between two adjacent filter press bottom plates (232) through the scraper (233) and scraper (2331). S5. After the paving is full, control the cleaning motor (11) to rotate the adjustment plate (15) to the initial position. At this time, the scraper (233) will move to the initial position automatically. Then, start the second hydraulic rod (163) to drive the discharge pipe (16) to automatically retract, so that the adjustment hole (151) is separated from the limit rod (236). At the same time, the sealing plate (166) seals the connecting groove, and the particles are discharged in a single quantitative manner. S6. After the laying is completed, start the conveyor motor to drive the filter press conveyor belt (2) to move, so that the laid particles move a set distance on the conveyor plate (22), and the next filter press conveyor belt (2) to be laid moves to the bottom of the discharge pipe (16) again to wait for discharge. S7. When the laid particles move to the bottom of the sealing plate (21), the first hydraulic rod (25) is activated, so that the first hydraulic rod (25) is inserted into the corresponding filter hole (235). At this time, as the filter conveyor belt (2) rotates, the first hydraulic rod (25) can drive the filter main plate (231) to move towards the filter bottom plate (232) on one side. Due to the sliding and sealed connection between the conveyor plate (22) and the filter main plate (231), the filter bottom plate (232) and the filter conveyor belt (2), the filter main plate (231) will filter the laid particles. After the filter is completed, the first hydraulic rod (25) is activated to automatically retract. At this time, the filter main plate (231) automatically returns to the initial position due to the elasticity of the return spring (238), realizing the automatic retraction of the filter main plate (231) after the filter is filtered, without affecting the overall conveying. S8. After the filter press is completed, the particles move to the output end with the filter press conveyor belt (2). Due to gravity and the knocking of the cam (26), the particles automatically separate from the filter press conveyor belt (2) and fall into the dryer (3) for automatic drying. Then the dried particles are sent into the classifier for screening; spherical alumina can be obtained.

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