Aluminum oxide impurity removal device and process with self-cleaning function

Abstract

The invention belongs to the technical field of aluminum oxide impurity removal, and particularly relates to an aluminum oxide impurity removal device and process with a self-cleaning function. The aluminum oxide impurity removal device comprises an impurity removal box, a material hopper is installed at the top of the impurity removal box, a conveying belt is arranged in the impurity removal box, and an impurity removal cleaning mechanism is arranged above the conveying belt; the impurity removing and cleaning mechanism is used for conducting impurity removing and cleaning on aluminum oxide flatly laid and conveyed on the conveying belt, a filter screen is arranged at the tail of the conveying belt, a material guiding plate is in inclined contact with the lower portion of the filter screen, the bottom end of the inclined material guiding plate is flush with a discharging opening formed in the right side face of the impurity removing box, and the discharging opening communicates with a feeding box. An elastic material guide box is obliquely arranged at the bottom of the material hopper, and the lower end of the elastic material guide box is suspended to the upper surface of the conveying belt in an open state; the situation that a large amount of aluminum oxide powder directly and vertically falls onto the filter screen, so that the filter screen is blocked and cannot work normally, and then the normal aluminum oxide powder supply processing use of the impurity removal device to the chute is influenced is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum oxide impurity removal, and in particular relates to an aluminum oxide impurity removal device and process with a self-cleaning function. Background Art

[0002] The main raw material for aluminum electrolysis is alumina. In the unloading section, alumina particles are mixed with a large amount of packaging bag weaving wire, iron materials, etc. The alumina particles with impurities will cause blockage to the receiving equipment, making it impossible for the alumina raw materials to be evenly fed into the purification system.

[0003] However, since the alumina to be removed is mostly in powder form, most of the existing alumina removal devices directly pour the alumina powder into a removal box, and then remove the impurities through inclined filter plates and other structures. Obviously, this type of removal method is not only likely to cause the alumina powder to accumulate in the removal box and affect the removal efficiency, but also likely to cause the filter to be clogged, making it difficult to automatically clean the filter, which will further affect the rapid and efficient removal of the alumina powder by the removal device. Summary of the invention

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] The present invention discloses an aluminum oxide impurity removal device with a self-cleaning function, comprising an impurity removal box, a material hopper is installed on the top of the impurity removal box, and a conveyor belt is inside the impurity removal box, an impurity removal and cleaning mechanism is arranged above the conveyor belt, and the impurity removal and cleaning mechanism is used for removing impurities and cleaning the aluminum oxide flatly conveyed on the conveyor belt, a filter screen is arranged at the tail of the conveyor belt, and a material guide plate is obliquely contacted below the filter screen, the bottom end of the inclined material guide plate is flush with a discharge port opened on the right side of the impurity removal box, and the discharge port is connected to a feeding box, an elastic material guide box is obliquely arranged at the bottom of the material hopper, and the lower end of the elastic material guide box is open and suspended to the upper surface of the conveyor belt.

[0006] Furthermore, the debris removal and cleaning mechanism includes a rotating shaft tube, a rotating roller, a positioning tube, a sleeve tube and raised burrs. The rotating shaft tube is rotatably installed on the front and rear side walls of the debris removal box through a bearing, and a rotating roller is fixedly sleeved on the rotating shaft tube. The rotating roller is located above the conveyor belt, and at least four groups of positioning tubes are installed in a circular array on the rotating roller, and each group of multiple positioning tubes is installed equidistantly along the length direction of the rotating roller. A sleeve tube is detachably installed on each of the positioning tubes through a positioning snap-fit ​​assembly. The outer ring surface of the sleeve tube is designed as a magnet surface, and the outer ring surface array of the sleeve tube is installed with raised burrs.

[0007] Furthermore, an exclusion slot is provided at the position where the top wall of the debris removal box is aligned with the rotating roller, a portal frame is fixed on the top of the exclusion slot, at least two groups of electric telescopic rods are vertically fixed on the horizontal beam of the portal frame, and a suspension plate is fixed to the lower end surfaces of the piston rods of the two electric telescopic rods, a plurality of clamping cylinders are equidistantly fixed on the lower surface of the suspension plate, and the jaws of the plurality of clamping cylinders have openings facing the exclusion slot.

[0008] Furthermore, the positioning and snap-fitting assembly includes a snap-fitting ball, a sealing plug, a supporting spring and an air intake pipe, the bottom of the positioning pipe is in a sealed state, and a plurality of movable guide grooves are provided in a circumferential array on the pipe wall thereof, the slots of the plurality of movable guide grooves face the pipe center of the positioning pipe, a snap-fitting ball is slidably installed on the outer end slot of each movable guide groove, and the snap-fitting ball is located inside the movable guide groove and a sealing plug is fixed thereon, the sealing plug is directly connected to the groove bottom of the movable guide groove through a supporting spring, the movable guide groove is directly connected to the inner wall of the positioning pipe through an air guide hole, the upper end pipe openings of the plurality of positioning pipes are also connected to the rotating shaft pipe through the plurality of air guide holes, an air intake pipe is fitted and inserted in the rotating shaft pipe, and a plurality of alignment holes are provided on the pipe wall at the upper end of the air intake pipe, the plurality of alignment holes are rotationally aligned with the plurality of air guide holes, a plurality of snap-fitting holes corresponding to the snap-fitting balls are provided in a circumferential array on the pipe wall of the plurality of sleeve tubes, and the sleeve wall thickness of the sleeve tube is smaller than the diameter of the snap-fitting ball.

[0009] Furthermore, a plurality of segmented friction strips are equidistantly arranged on the outer surfaces of both ends of the conveyor belt, contact strips are symmetrically fixed on the upper surface of the filter screen near the bottom of the conveyor belt, and the contact strips and the rotating friction strips are in friction contact with each other, and the filter screen is directly connected to the right side wall of the dust removal box through a tensioning adjustment component.

[0010] Furthermore, the tensioning adjustment assembly includes a collection box, a tensioning spring, a support screw and a blocking plate. The collection box is fixedly mounted on the right side wall of the debris removal box, and a filter screen is slidably inserted into the bottom of the collection box. The end of the filter screen located at the collection box is connected to the box wall of the collection box through a tensioning spring. The support screw passes through the box wall of the collection box and is slidably inserted into the end face of the filter screen, and the support screw is inserted into the tensioning spring. The outer end face of the support screw is fixed to the collection box through a nut. The upper surface of the filter screen is designed to be non-contact with the upper box wall of the collection box, and the inner box mouth of the collection box is in sliding contact with the upper surface of the filter screen through a rotating blocking plate.

[0011] Furthermore, a partition is slidably arranged above the filter screen and below the conveyor belt, an electric push rod is fixed on the upper surface of the filter screen, and the piston rod of the electric push rod is connected to the partition, push blocks are symmetrically fixed on the left and right sides of the partition, and the push blocks are slidably fitted onto the filter screen, and the height of the push block and the partition is less than the height of the blocking plate.

[0012] Furthermore, the process is applicable to the above-mentioned alumina impurity removal device with self-cleaning function to remove impurities from alumina, and the process comprises the following steps:

[0013] S1: Alumina spreading: The alumina powder to be cleaned is fed into the material hopper, and the alumina powder in the material hopper is evenly spread onto the continuously rotating conveyor belt through the inclined elastic guide box;

[0014] S2: Preliminary impurity removal: The impurity removal and cleaning mechanism located above the conveyor belt is inserted into the flat alumina powder to achieve contact-type preliminary impurity removal of iron and plastic wire impurities mixed in the alumina powder;

[0015] S3: Secondary impurity removal: The conveyor belt then continues to transport the initially cleaned alumina powder to the tail, and the flat alumina powder will be transported by the slowly rotating conveyor belt and fall onto the constantly shaking filter net, and then the filter net will filter and intercept other impurities mixed in the slowly falling alumina powder;

[0016] S4: Discharge and use: The alumina powder that has been removed from the filter will be transported to the feed box through the inclined guide plate below, and then fall into the chute below for subsequent processing.

[0017] The present invention has the following beneficial effects:

[0018] 1. The present invention spreads the aluminum oxide powder onto the conveyor belt first, so that it will not accumulate in the impurity removal box. The impurity removal and cleaning mechanism cleans the impurities on the spread aluminum oxide powder in a rotating and sled-like manner, and the impurity removal box will not be blocked by the cleaned impurities. The continuously shaking filter screen can perform secondary impurity removal on the slowly falling aluminum oxide powder, which not only improves the effect of removing impurities from the aluminum oxide powder, but also prevents a large amount of aluminum oxide powder from falling directly and vertically onto the filter screen, causing the filter screen to be blocked and unable to work normally, which will further affect the normal supply of aluminum oxide powder to the chute by the impurity removal device for processing.

[0019] 2. The present invention installs a reciprocatingly shaking filter screen at the tail end of the conveyor belt. The operation of the conveyor belt will cause the friction strips to rub against the contact strips on the filter screen, and the moving friction strips will drive the filter screen to move in the direction of rotation of the conveyor belt through the contact strips. When the friction strips are separated from the frictional contact with the contact strips, the tensioning adjustment component will drive the filter screen to reset, and the continuous frictional contact between the multiple friction strips and the contact strips will cause the filter screen to reciprocate in the impurity removal box, thereby accelerating the filtering and separation effect of other impurities mixed in the fallen alumina powder.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the overall structure disclosed in the present invention;

[0023] Figure 2 It is a schematic diagram of the internal structure of the impurity removal box disclosed in the present invention;

[0024] Figure 3 A cross-sectional view of the rotating roller disclosed in the present invention;

[0025] Figure 4 It is a structural schematic diagram of the filter screen disclosed in the present invention;

[0026] Figure 5 is a cross-sectional view of the collection box disclosed in the present invention;

[0027] Figure 6 The present invention discloses Figure 3 A partial enlarged view of point A in the middle.

[0028] In the figure: 1, impurity removal box; 11, discharge port; 12, discharge slot; 2, material hopper; 21, elastic guide box; 3, conveyor belt; 31, friction strip; 4, impurity removal and cleaning mechanism; 41, rotating shaft tube; 42, rotating roller; 43, positioning tube; 431, moving guide groove; 432, air guide hole; 44, sleeve tube; 441, buckle hole; 45, raised burr; 46, door frame; 47, electric telescopic rod; 48, suspension Hanging plate; 49, clamping cylinder; 5, positioning snap-fit ​​assembly; 51, snap-fit ​​ball; 52, sealing plug; 53, support spring; 54, suction pipe; 541, alignment hole; 6, filter screen; 61, contact strip; 7, tension adjustment assembly; 71, collection box; 72, tension spring; 73, support screw; 74, blocking plate; 75, partition; 76, electric push rod; 77, push block; 8, guide plate; 9, feed box. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] See also Figure 1-Figure 6 As shown, the present invention is an alumina impurity removal device with a self-cleaning function, comprising an impurity removal box 1, a material hopper 2 is installed on the top of the impurity removal box 1, and a conveyor belt 3 is inside the impurity removal box 1, and an impurity removal cleaning mechanism 4 is arranged above the conveyor belt 3, and the impurity removal cleaning mechanism 4 is used to remove impurities and clean the alumina flatly conveyed on the conveyor belt 3, and a filter screen 6 is arranged at the tail of the conveyor belt 3, and a guide plate 8 is obliquely contacted below the filter screen 6, and the bottom end of the inclined guide plate 8 is flush with a discharge port 11 opened on the right side of the impurity removal box 1, and the discharge port 11 is connected to a feed box 9, and an elastic guide box 21 is obliquely arranged at the bottom of the material hopper 2, and the lower end of the elastic guide box 21 is open and suspended to the upper surface of the conveyor belt 3;

[0032] In the scheme designed by the present invention, when it is necessary to remove impurities from the alumina, the alumina is first put into the material hopper 2, and the alumina powder in the material hopper 2 will be evenly spread onto the continuously rotating conveyor belt 3 through the inclined elastic material guide box 21, and the impurity removal and cleaning mechanism 4 located above will contact and clean the iron and plastic wires and other impurities mixed in the alumina powder spread and transported on the conveyor belt 3, and then the conveyor belt 3 will continue to transport the alumina powder that has been preliminarily removed from the flat surface to the tail, and the spread alumina powder will be transported by the slowly rotating conveyor belt 3 to the continuously shaking filter screen 6, and then the filter screen 6 will filter and intercept other impurities mixed in the slowly falling alumina powder, and then transport it to the conveyor through the inclined guide plate 8. The aluminum oxide powder is first spread on the conveyor belt 3 to prevent it from piling up in the impurity removal box 1, and the impurity removal and cleaning mechanism 4 cleans the spread aluminum oxide powder of debris by rotating and climbing in a sled-like manner, and the impurities after cleaning will not clog the impurity removal box 1. The continuously shaking filter screen 6 can perform secondary impurity removal on the slowly falling aluminum oxide powder, which not only improves the impurity removal effect of the aluminum oxide powder, but also prevents a large amount of aluminum oxide powder from falling directly and vertically onto the filter screen 6, causing the filter screen 6 to be blocked and unable to work normally, thereby affecting the normal supply of aluminum oxide powder to the chute for processing by the impurity removal device.

[0033] In this embodiment, the impurity removal and cleaning mechanism 4 includes a rotating shaft tube 41, a rotating roller 42, a positioning tube 43, a sleeve tube 44 and a raised burr 45. The rotating shaft tube 41 is rotatably installed on the front and rear side walls of the impurity removal box 1 through a bearing, and a rotating roller 42 is fixedly sleeved on the rotating shaft tube 41. The rotating roller 42 is located above the conveyor belt 3, and at least four groups of positioning tubes 43 are installed in a circumferential array on the rotating roller 42, and each group of multiple positioning tubes 43 is equidistantly installed along the length direction of the rotating roller 42. A sleeve tube 44 is detachably installed on each positioning tube 43 through a positioning buckle assembly 5. The outer ring surface of the sleeve tube 44 is designed as a magnet surface, and the outer ring surface array of the sleeve tube 44 is installed with raised burrs 45;

[0034] Specifically, the rotating shaft tube 41 is driven by a servo motor fixed on the rear side of the dust removal box 1 to drive the rotating roller 42 to rotate. Since the multiple sleeve tubes 44 are installed along the length direction of the rotating roller 42, the multiple sleeve tubes 44 will be inserted into the aluminum oxide powder spread on the surface of the conveyor belt 3 like a plow, and the raised burrs 45 can be wound and scraped to clean the mixed silk threads and other debris in the aluminum oxide powder, and the design of the magnetic surface can absorb and clean the mixed iron and other debris. When the multiple sleeve tubes 44 are on the spread aluminum oxide for a long time, the aluminum oxide powder will be smooth and smooth. When the powder is being cleaned in a plowing and raking manner, the rotating roller 42 can be controlled to rotate intermittently, so that the other multiple unused sleeves 44 on the rotating roller 42 are inserted into the flat alumina powder, and the used sleeves 44 will continue to rotate to a vertical upward position for automatic replacement and cleaning, and there is no need to stop the machine for cleaning and replacement, thereby preventing the mixed impurities in the alumina powder of the subsequent conveyor belt 3 from being effectively and timely removed and cleaned due to the multiple sleeves 44 cleaning the impurities for a long time without timely replacement and self-cleaning.

[0035] In this embodiment, a discharge slot 12 is provided at the top wall of the impurity removal box 1 aligned with the rotating roller 42, a door frame 46 is fixed to the top of the discharge slot 12, at least two groups of electric telescopic rods 47 are vertically fixed to the horizontal crossbeam of the door frame 46, and a suspension plate 48 is fixed to the lower end surface of the piston rod of the two electric telescopic rods 47, a plurality of clamping cylinders 49 are equidistantly fixed to the lower surface of the suspension plate 48, and the jaws of the plurality of clamping cylinders 49 open toward the discharge slot;

[0036] Specifically, when the multiple sleeve tubes 44 are rotated toward the exclusion slot 12 after use, the piston rod of the electric telescopic rod 47 extends through the suspension plate 48 to drive the clamping cylinder 49 with multiple jaws opened to extend into the exclusion slot 12, and the multiple opened jaws will align with the multiple sleeve tubes 44. At this time, the multiple jaws of the clamping cylinder 49 move to clamp and fix the multiple sleeve tubes 44, and then the positioning buckle assembly 5 will disengage the connection between the sleeve tube 44 and the positioning tube 43, and the piston rod of the electric telescopic rod 47 will be retracted to take the clamped sleeve tube 44 out of the debris removal box 1 for cleaning, and then Then, the cleaned socket tube 44 is clamped onto multiple clamping cylinders 49, and the piston rod of the electric telescopic rod 47 is extended to insert the cleaned socket tube 44 into the exclusion slot 12 and sleeved on the positioning tube 43. The positioning snap-fit ​​assembly 5 connects the positioning tube 43 and the socket tube 44, and the clamping cylinder 49 disengages from the clamping of the connected socket tube 44. The piston rod of the electric telescopic rod 47 is retracted, and the clamping cylinder 49 is pulled out of the exclusion slot 12, so that it will not interfere with the rotating roller 42 to drive the cleaned socket tube 44 to continue to rotate onto the flat alumina powder to clean up the debris.

[0037] In this embodiment, the positioning and locking assembly 5 includes a locking ball 51, a sealing plug 52, a support spring 53 and an air intake pipe 54. The bottom of the positioning tube 43 is in a sealed state, and a plurality of movable guide grooves 431 are provided in a circumferential array on the tube wall thereof. The slots of the plurality of movable guide grooves 431 face the tube center of the positioning tube 43. A locking ball 51 is slidably installed in the outer slot of each movable guide groove 431, and a sealing plug 52 is fixed inside the locking ball 51 located in the movable guide groove 431. The sealing plug 52 is directly connected to the bottom of the movable guide groove 431 through the support spring 53. The movable guide groove 431 is directly connected to the inner wall of the positioning tube 43 through the air guide hole 432, and the upper end pipe openings of the plurality of positioning tubes 43 are also connected to the rotating shaft tube 41 through the plurality of air guide holes 432. An air intake pipe 54 is inserted and fitted into the rotating shaft tube 41, and a plurality of alignment holes 541 are provided on the upper end pipe wall of the air intake pipe 54. The plurality of alignment holes 541 are rotationally aligned with the plurality of air guide holes 432. A plurality of buckling holes 441 corresponding to the buckling balls 51 are provided in a circumferential array on the wall of the plurality of sleeve tubes 44, and the thickness of the wall of the sleeve tube 44 is less than the diameter of the buckling ball 51.

[0038] Specifically, when the rotating roller 42 drives the multiple used sleeve tubes 44 upward, the multiple air guide holes 432 opened on the rotating tube will be aligned with the multiple alignment holes 541, so that the suction pipe 54 is connected with the multiple positioning tubes 43 through the rotating shaft tube 41, and the suction force generated by the suction pipe 54 will act on the multiple moving guide grooves 431 through the multiple air guide holes 432 on the positioning tube 43, so that the multiple sealing plugs 52 will drive the multiple buckling balls 51 to disengage from the multiple buckling holes 441, and then the clamping claws of the clamping cylinder 49 will drive the multiple sleeve tubes 44 to move upward and out of the positioning tubes 43. Quick detachment and disassembly; when multiple cleaned sleeves 44 are sleeved on the positioning tube 43, air can be inflated into the suction pipe 54, so that the gas filled in the movable guide groove 431 and the elastic restoring force of the support spring 53 push the snap-fit ​​ball 51 into the corresponding snap-fit ​​hole 441 through the sealing plug 52, and part of the ball of the snap-fit ​​ball 51 will extend out of the snap-fit ​​hole 441, so that multiple sleeves 44 can be stably and quickly installed on the multiple positioning tubes 43, and the phenomenon that the sleeves 44 are detached from the positioning tube 43 when the multiple sleeves 44 are rotated downward will not occur.

[0039] In this embodiment, a plurality of segmented friction strips 31 are equidistantly arranged on the outer surfaces of both ends of the conveyor belt 3, and a contact strip 61 is symmetrically fixed on the upper surface of the filter screen 6 near the lower side of the conveyor belt 3, and the contact strip 61 and the rotating friction strip 31 are in friction contact with each other, and the filter screen 6 is directly connected to the right side wall of the dust removal box 1 through a tension adjustment component 7;

[0040] Specifically, when the conveyor belt 3 continuously rotates and the cleaned aluminum oxide powder is continuously dropped onto the filter screen 6 for re-filtration, the friction strips 31 on the conveyor belt 3 will rub against each other with the contact strips 61 on the filter screen 6, and then the moving friction strips 31 will drive the filter screen 6 to move in the direction of rotation of the conveyor belt 3 through the contact strips 61. When the friction strips 31 are separated from the friction contact with the contact strips 61, the tensioning adjustment component 7 will drive the filter screen 6 to reset, and then the continuous friction contact between the multiple friction strips 31 and the contact strips 61 will cause the filter screen 6 to shake back and forth in the impurity removal box 1, thereby accelerating the filtering and separation effect of other impurities mixed in the fallen aluminum oxide powder. The contact surface of the friction strips 31 and the contact strips 61 can be designed as a rough surface to increase the friction between the two, and the distance between two adjacent friction strips 31 is greater than the length of the contact strips 61, so that the filter screen 6 can be completely reset and then slide.

[0041] In the present embodiment, the tensioning adjustment assembly 7 comprises a collection box 71, a tensioning spring 72, a support screw 73 and a blocking plate 74. The collection box 71 is fixedly mounted on the right side wall of the debris removal box 1, and a filter screen 6 is slidably inserted inside the bottom of the collection box 71. The end of the filter screen 6 located in the collection box 71 is connected to the box wall of the collection box 71 through the tensioning spring 72. The support screw 73 passes through the box wall of the collection box 71 and is slidably inserted into the end face of the filter screen 6, and the support screw 73 is inserted into the tensioning spring 72. The outer end face of the support screw 73 is fixed to the collection box 71 through a nut. The upper surface of the filter screen 6 is designed to be non-contact with the upper box wall of the collection box 71, and the inner box opening of the collection box 71 is in sliding contact with the upper surface of the filter screen 6 through the rotating blocking plate 74.

[0042] Specifically, when the filter screen 6 slides in the direction of the left conveyor belt 3, the tensioning spring 72 will be stretched, and the supporting screw 73 will slide at the end of the filter screen 6. At the same time, the filter screen 6 will slide in the collecting box 71, and the blocking plate 74 will block the aluminum oxide powder that falls on the surface of the filter screen 6. When the friction strip 31 and the contact strip 61 are out of friction contact, the elastic restoring force of the tensioning spring 72 will pull the filter screen 6 to move in the collecting box 71, thereby facilitating the filter screen 6 to follow the operation of the conveyor belt 3, and synchronously shake back and forth in the impurity removal box 1 to perform secondary filtering and impurity removal on the aluminum oxide powder, and the supporting screw 73 can support the sliding filter screen 6.

[0043] In this embodiment, a partition 75 is slidably provided above the filter screen 6 and below the conveyor belt 3, an electric push rod 76 is fixed to the upper surface of the filter screen 6, and the piston rod of the electric push rod 76 is connected to the partition 75, and push blocks 77 are symmetrically fixed on the left and right sides of the partition 75, and the push blocks 77 are slidably attached to the filter screen 6, and the height of the push blocks 77 and the partition 75 is less than the height of the blocking plate 74;

[0044] Specifically, the design of the partition 75 can block the aluminum oxide powder on the surface of the reciprocating filter screen 6 to prevent the aluminum oxide powder from falling to the bottom of the impurity removal box 1 through the gap between the filter screen 6 and the conveyor belt 3. When there are more impurities filtered on the filter screen 6, the conveyor belt 3 is controlled to run slowly, and the piston rod of the electric push rod 76 is extended to push the partition 75 to move toward the collection box 71, and then the sliding partition 75 will scrape the impurities accumulated on the surface of the filter screen 6 to the collection box, and when the partition 75 moves When it moves close to the blocking plate 74, the pushing block 77 on one side will open the rotating blocking plate 74, so that the partition 75 can push the scraped debris into the collection box 71, and then quickly discharge it through the opening at the bottom of the collection box 71, thereby facilitating the automatic and rapid cleaning of the debris intercepted on the filter screen 6, and there is no need for the debris removal device to stop working. The piston rod of the electric push rod 76 is retracted, and the partition 75 will slide to the initial position, continuing to block the aluminum oxide powder falling from the shaking filter screen 6.

[0045] A process for removing impurities from aluminum oxide with a self-cleaning function, which is suitable for removing impurities from aluminum oxide using the above-mentioned aluminum oxide impurity removal device with a self-cleaning function, and comprises the following steps:

[0046] S1: Alumina spreading: The alumina powder to be cleaned is fed into the material hopper 2, and the alumina powder in the material hopper 2 is evenly spread onto the continuously rotating conveyor belt 3 through the inclined elastic material guide box 21;

[0047] S2: Preliminary impurity removal: The impurity removal and cleaning mechanism 4 located above the conveyor belt 3 is inserted into the flat alumina powder to achieve contact-type preliminary impurity removal of iron and plastic wire impurities mixed in the alumina powder;

[0048] S3: Secondary impurity removal: Then the conveyor belt 3 continues to convey the initially impurity-removed alumina powder to the tail, and the alumina powder is conveyed by the slowly rotating conveyor belt 3 and falls onto the constantly shaking filter screen 6, and then the filter screen 6 will filter and intercept other impurities mixed in the slowly falling alumina powder;

[0049] S4: Discharge and use: The alumina powder removed by the filter screen 6 will be transported to the feed box 9 through the inclined guide plate 8 below, and then fall into the chute below for subsequent processing.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0051] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An alumina impurity removal device with self-cleaning function, characterized in that: The utility model comprises a dust removal box (1), a material hopper (2) is installed on the top of the dust removal box (1), and a conveyor belt (3) is arranged inside the dust removal box (1), and a dust removal and cleaning mechanism (4) is arranged above the conveyor belt (3), and the dust removal and cleaning mechanism (4) is used to remove dust and clean the aluminum oxide flatly conveyed on the conveyor belt (3); a filter screen (6) is arranged at the tail of the conveyor belt (3), and a guide plate (8) is obliquely contacted below the filter screen (6), and the bottom end of the inclined guide plate (8) is flush with a discharge port (11) opened on the right side of the dust removal box (1), and the discharge port (11) is connected to a feed box (9); an elastic guide box (21) is obliquely arranged at the bottom of the material hopper (2), and the lower end of the elastic guide box (21) is open and suspended on the upper surface of the conveyor belt (3).

2. The alumina impurity removal device with self-cleaning function according to claim 1, characterized in that: The impurity removal and cleaning mechanism (4) comprises a rotating shaft tube (41), a rotating roller (42), a positioning tube (43), a sleeve tube (44) and a raised burr (45). The rotating shaft tube (41) is rotatably mounted on the front and rear side walls of the impurity removal box (1) through a bearing, and a rotating roller (42) is fixedly sleeved on the rotating shaft tube (41). The rotating roller (42) is located above the conveyor belt (3), and at least four groups of positioning tubes (43) are installed in a circumferential array on the rotating roller (42), and each group of multiple positioning tubes (43) are installed equidistantly along the length direction of the rotating roller (42). A sleeve tube (44) is detachably mounted on each positioning tube (43) through a positioning buckle assembly (5), and the outer ring surface of the sleeve tube (44) is designed as a magnet surface, and the outer ring surface of the sleeve tube (44) is installed with raised burrs (45) in an array.

3. The alumina impurity removal device with self-cleaning function according to claim 2, characterized in that: A discharge slot (12) is provided at a position where the top wall of the impurity removal box (1) is aligned with the rotating roller (42); a door frame (46) is fixed to the top of the discharge slot (12); at least two groups of electric telescopic rods (47) are vertically fixed to the horizontal crossbeam of the door frame (46); and a suspension plate (48) is fixed to the lower end surface of the piston rod of the two electric telescopic rods (47); and a plurality of clamping cylinders (49) are equidistantly fixed to the lower surface of the suspension plate (48), and the openings of the clamping claws of the plurality of clamping cylinders (49) face the discharge slot.

4. The alumina impurity removal device with self-cleaning function according to claim 3, characterized in that: The positioning and locking assembly (5) comprises a locking ball (51), a sealing plug (52), a supporting spring (53) and an air intake pipe (54). The bottom of the positioning pipe (43) is in a sealed state, and a plurality of movable guide grooves (431) are arranged in a circumferential array on the pipe wall. The slots of the plurality of movable guide grooves (431) face the pipe center of the positioning pipe (43). A locking ball (51) is slidably installed in the outer slot of each movable guide groove (431), and a sealing plug (52) is fixed inside the locking ball (51) located in the movable guide groove (431). The sealing plug (52) is directly connected to the bottom of the movable guide groove (431) through the supporting spring (53). The movable guide groove (431) is directly connected to the inner wall of the positioning tube (43) through the air guide hole (432); the upper end pipe openings of the plurality of positioning tubes (43) are also connected to the rotating shaft tube (41) through the plurality of air guide holes (432); an air intake pipe (54) is inserted and fitted into the rotating shaft tube (41); and the upper end pipe wall of the air intake pipe (54) is provided with a plurality of alignment holes (541); the plurality of alignment holes (541) are rotationally aligned with the plurality of air guide holes (432); a plurality of buckling holes (441) corresponding to the buckling balls (51) are provided in a circular array on the wall of the plurality of sleeve tubes (44); and the thickness of the wall of the sleeve tube (44) is smaller than the diameter of the buckling balls (51).

5. The alumina impurity removal device with self-cleaning function according to claim 1, characterized in that: The outer surfaces of the two ends of the conveyor belt (3) are equidistantly provided with a plurality of segmented friction strips (31); the upper surface of the filter screen (6) is symmetrically fixed with contact strips (61) near the bottom of the conveyor belt (3); and the contact strips (61) and the rotating friction strips (31) are in frictional contact with each other; the filter screen (6) is directly connected to the right side wall of the dust removal box (1) via a tensioning adjustment component (7).

6. The alumina impurity removal device with self-cleaning function according to claim 5, characterized in that: The tensioning adjustment assembly (7) comprises a collection box (71), a tensioning spring (72), a support screw (73) and a blocking plate (74); the collection box (71) is fixedly mounted on the right side wall of the debris removal box (1); and a filter screen (6) is slidably inserted into the bottom of the collection box (71); the end of the filter screen (6) located in the collection box (71) is connected to the box wall of the collection box (71) through the tensioning spring (72); the support screw (73) passes through the box wall of the collection box (71) and is slidably inserted into the end face of the filter screen (6); and the support screw (73) is inserted into the tensioning spring (72); the outer end face of the support screw (73) is fixed to the collection box (71) through a nut; the upper surface of the filter screen (6) is designed to be non-contacting with the upper box wall of the collection box (71); and the inner box opening of the collection box (71) is in sliding contact with the upper surface of the filter screen (6) through the rotating blocking plate (74).

7. The alumina impurity removal device with self-cleaning function according to claim 6, characterized in that: A partition (75) is slidably arranged above the filter screen (6) and below the conveyor belt (3); an electric push rod (76) is fixed on the upper surface of the filter screen (6), and the piston rod of the electric push rod (76) is connected to the partition (75); push blocks (77) are symmetrically fixed on the left and right sides of the partition (75), and the push blocks (77) are slidably fitted onto the filter screen (6); the height of the push blocks (77) and the partition (75) is less than the height of the blocking plate (74).

8. A process for removing impurities from aluminum oxide with a self-cleaning function, characterized in that: The process is applicable to the alumina impurity removal device with self-cleaning function as described in any one of claims 1 to 7 above to remove impurities from alumina, and the process comprises the following steps: S1: Alumina spreading: The alumina powder to be cleaned is fed into the material hopper (2), and the alumina powder in the material hopper (2) is evenly spread onto the continuously rotating conveyor belt (3) through the inclined elastic material guide box (21); S2: Preliminary impurity removal: the impurity removal and cleaning mechanism (4) located above the conveyor belt (3) is inserted into the flat alumina powder to achieve contact-type preliminary impurity removal of iron and plastic wire impurities mixed in the alumina powder; S3: Secondary impurity removal: The conveyor belt (3) then continues to convey the initially impurity-removed aluminum oxide powder to the tail, and the aluminum oxide powder is conveyed by the slowly rotating conveyor belt (3) to fall onto the continuously shaking filter screen (6), and then the filter screen (6) will filter and intercept other impurities mixed in the slowly falling aluminum oxide powder; S4: Discharge and use: The aluminum oxide powder that has been removed by the filter (6) will be transported to the feed box (9) through the inclined guide plate (8) below, and then fall into the chute below for subsequent processing and use.

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