CN220387131U - Vibration screening device for aluminum ore pulp material - Google Patents

Abstract

The application relates to a vibrating screening device for aluminum ore pulp materials, and relates to the technical field of aluminum ore screening equipment, comprising a box body and a first filter plate; the box body is vertically arranged, and the top and the bottom of the box body are both of an opening structure; at least two first limiting blocks are fixedly arranged in the box body; at least two first springs are arranged in the box body, the first springs correspond to the first limiting blocks one by one, and the first springs are fixedly arranged at the tops of the first limiting blocks; the first filter plate is horizontally arranged in the box body and is in sliding connection with the box body, and the bottom of the first filter plate is fixedly connected with the top of the first spring; the box is provided with a driving assembly, and the driving assembly is used for driving the first filter plate to slide along the vertical direction. The utility model provides a screening efficiency of bauxite can be improved.

Description

Vibration screening device for aluminum ore pulp material

Technical Field

The application relates to the technical field of aluminum ore screening equipment, in particular to a vibration screening device for aluminum ore pulp materials.

Background

After bauxite is mined, a large amount of clay is often covered by bonding, and in order to obtain clean concentrate, the clay on the surface of the bauxite is usually cleaned by wet water washing.

When the clay adhered on the bauxite is removed by adopting wet water washing, the bauxite is washed by high-pressure water, so that the clay adhered on the bauxite is washed, and then the formed bauxite and slurry mixture is filtered by a filter screen, wherein the slurry flows through the filter screen, and the bauxite stays on the filter screen, so that clean bauxite concentrate is obtained.

In the process of removing the clay bonded on the bauxite, when the mixture of the bauxite and the slurry passes through the filter screen, the massive bauxite easily blocks the meshes of the filter screen, so that the speed of the filtered slurry can be gradually slowed down, and the screening efficiency of the bauxite is reduced.

Disclosure of Invention

In order to improve bauxite screening efficiency, the application provides a vibratory screening device for aluminum ore slurry.

The application provides a vibration screening device for aluminum ore pulp adopts following technical scheme:

a vibration screening device for aluminum ore pulp material comprises a box body and a first filter plate; the box body is vertically arranged, and the top and the bottom of the box body are both of an opening structure; at least two first limiting blocks are fixedly arranged in the box body; at least two first springs are arranged in the box body, the first springs correspond to the first limiting blocks one by one, and the first springs are fixedly arranged at the tops of the first limiting blocks; the first filter plate is horizontally arranged in the box body and is in sliding connection with the box body, and the bottom of the first filter plate is fixedly connected with the top of the first spring; the box is provided with a driving assembly, and the driving assembly is used for driving the first filter plate to slide along the vertical direction.

Through adopting above-mentioned technical scheme, when carrying out the screening of bauxite, operating personnel pour the back into the box with bauxite and mud mixture from the open-top of box into, filter through first filter, wherein mud passes first filter and flows out from the bottom opening of box and collect, and the bauxite then stays on first filter to obtain clean bauxite concentrate. In the screening process of bauxite, the first filter plate is driven to slide along the vertical direction through the driving component and is matched with the first spring, so that the first filter plate is always in an up-down reciprocating motion state, the bauxite piled on the first filter plate is vibrated, the filter holes of the first filter plate are prevented from being blocked by the bauxite, and the screening efficiency of the bauxite is improved.

Optionally, the driving components are provided with two groups and are respectively positioned at two sides of the first filter plate; the driving assembly comprises a first sliding block, a second sliding block, a first connecting rod, a third sliding block, a fourth sliding block, a second connecting rod, a motor and a transmission part; the first sliding block is abutted with the first filter plate, and the first sliding block is in sliding connection with the box body; the second sliding block is in sliding connection with the box body; two ends of the first connecting rod are respectively hinged with the first sliding block and the second sliding block; the third sliding block is fixedly connected with the box body; the fourth sliding block is in sliding connection with the box body; two ends of the second connecting rod are respectively hinged with the third sliding block and the fourth sliding block, and the second connecting rod is hinged with the first connecting rod; the motor is arranged on the box body; the transmission part is arranged on the box body and is used for transmitting power provided by the motor to the second sliding block and driving the second sliding block to slide.

Through adopting above-mentioned technical scheme, in the screening process of bauxite, the motor is in operating condition, on the power transmission that provides the motor to the second slider through drive unit to order about the second slider reciprocating sliding, the second slider drives first connecting rod and second connecting rod and rotates when sliding, and when first connecting rod rotated, it takes place relative slip to drive first slider and box, and first slider highly changes at the slip in-process, thereby makes first filter slide along vertical direction.

Optionally, the transmission component comprises a reciprocating screw and a screw nut; the reciprocating screw rod is fixedly connected with the motor output shaft in a coaxial way; the screw nut is sleeved on the reciprocating screw and is matched with the reciprocating screw; the screw nut is fixedly connected with the second sliding block.

Through adopting above-mentioned technical scheme, in the screening process of bauxite, the motor drives reciprocating screw and rotates, and reciprocating screw drives the lead screw nut and reciprocates from top to bottom along reciprocating screw to drive the second slider and do reciprocal rectilinear motion along vertical direction. The power provided by the motor is transmitted to the second sliding block, and the second sliding block is driven to slide.

Optionally, a scraper is fixedly arranged between the two first sliding blocks, and the scraper is abutted with the first filter plate; the box body is provided with a first discharge hole, and the first discharge hole is communicated with the inside of the box body; the first discharge openings are arranged in two and are respectively positioned at two ends of the first filter plate.

Through adopting above-mentioned technical scheme, the first slider is in the slip in-process, except that the change takes place for the height, carries out reciprocating sliding along the horizontal direction simultaneously to drive the scraper blade and carry out reciprocating motion along first filter, discharge the box with the first bin outlet of the both sides of accumulational bauxite on the first filter from, thereby avoid blockking up the filtration pore because of accumulational bauxite is too much on the first filter, thereby improve the screening efficiency of bauxite.

Optionally, when the side surface of the first slider close to the third slider and the side surface of the second slider far away from the fourth slider are in the same vertical plane, the first connecting rod is in an inclined state.

Through adopting above-mentioned technical scheme for when first slider slides to extreme position, first connecting rod still is in the incline condition, avoids first connecting rod through dead point position in the operation in-process, thereby avoids the dead man-hour waste that causes of card, thereby further improves bauxite's screening efficiency.

Optionally, a prefilter assembly is arranged on the box body, and the prefilter assembly comprises a second filter plate, a second limiting block and a second spring; the second filter plate is arranged in the box body and positioned at the top of the second sliding block, the second filter plate is hinged with the box body, and the filtering precision of the first filter plate is greater than that of the second filter plate; the second limiting block is positioned at the bottom of the second filter plate; the two ends of the second spring are fixedly connected with the second limiting block and the second filter plate respectively; the box body is provided with a second discharge hole, and the second discharge hole is communicated with the inside of the box body.

Through adopting above-mentioned technical scheme, when carrying out the screening of bauxite, behind bauxite and the mud mixture injection box, filter through the second filter at first, filter out great bauxite wherein earlier, avoid the great bauxite of volume to block up the filtration pore of first filter to the screening efficiency of bauxite has been improved.

When the second slider upwards slides under the drive of lead screw nut, the second slider makes the slope of second filter, and the bauxite of piling up on the second filter slides to the discharge of second bin outlet from the second filter to avoided piling up too much bauxite on the second filter and made the filtration pore of second filter jam.

Optionally, a first hinge plate is arranged at the opening of the first discharge hole, the first hinge plate is hinged with the box body, and the hinge position is positioned at the top of the first discharge hole; the opening part of the second discharge hole is provided with a second hinged plate, the second hinged plate is hinged with the box body, and the hinged part is positioned at the top of the second discharge hole.

Through adopting above-mentioned technical scheme, when the bauxite on the first filter removes to first bin outlet department, under the promotion of bauxite, first articulated slab upwards rotates and opens, and after the bauxite was discharged, under self gravity effect, first articulated slab downwards rotated and is closed first bin outlet. When bauxite on the second filter plate moves to the second discharge port, the second hinge plate rotates upwards to be opened under the pushing of the bauxite, and after the bauxite is discharged from the second discharge port, the second hinge plate rotates downwards to close the second discharge port under the action of self gravity. Thereby avoiding mud from splashing out of the box body from the first discharge hole and the second discharge hole in the screening process.

Optionally, the opening at the bottom of the box body is in a necking shape along the vertical downward direction.

Through adopting above-mentioned technical scheme, discharge from bottom half opening part behind mud through first filter and the second filter, the opening of throat form is convenient for collect the processing to mud.

In summary, the present application includes at least one of the following beneficial technical effects:

through setting up the drive assembly, in the screening process of bauxite, drive first filter along vertical direction to slide, with first spring cooperation for first filter is in reciprocating motion state from top to bottom all the time, thereby vibrates the bauxite of piling up on the first filter, avoids the bauxite to block up the filtration pore of first filter, thereby improves the screening efficiency of bauxite;

through setting up the scraper blade, drive the subassembly drives the scraper blade and carries out reciprocating motion on first filter when driving first filter along vertical direction slip, discharges the bauxite that piles up on the first filter from the first bin outlet of both sides out the box to avoid blockking up the filtration pore because of the bauxite that piles up on the first filter is too much, thereby improve the screening efficiency of bauxite;

through setting up the prefilter assembly, when carrying out the screening of bauxite, behind bauxite and mud mixture injection box, filter through the second filter at first, filter out wherein great bauxite earlier, avoid the great bauxite of volume to block up the filtration pore of first filter to the screening efficiency of bauxite has been improved; when the driving assembly drives the first filter plate to slide along the vertical direction, the driving assembly drives the second filter plate to incline, and bauxite piled on the second filter plate is discharged, so that the phenomenon that too much bauxite piled on the second filter plate causes the filter holes of the second filter plate to be blocked is avoided.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present application;

FIG. 2 is a cross-sectional view of an embodiment of the present application for showing a first slider;

FIG. 3 is a cross-sectional view of an embodiment of the present application showing a second hinge plate.

Reference numerals illustrate:

1. a case; 11. a first limiting block; 12. a first spring; 13. a scraper; 14. a first discharge port; 141. a first hinge plate; 15. a second discharge port; 151. a second hinge plate;

2. a first filter plate;

3. a drive assembly; 31. a first slider; 32. a second slider; 33. a first link; 34. a third slider; 35. a fourth slider; 36. a second link; 37. a motor; 38. a transmission member; 381. a reciprocating screw; 382. a lead screw nut;

4. a prefilter assembly; 41. a second filter plate; 42. a second limiting block; 43. and a second spring.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-3.

The embodiment of the application discloses a vibration screening device for aluminum ore slurry. Referring to fig. 1 and 2, a vibratory screening apparatus for aluminum slurry includes a tank 1, a first filter plate 2, and a prefilter assembly 4. The box 1 is vertical to be set up, and box 1 top and bottom are open structure, and box 1 bottom is the throat form along vertical decurrent direction. The first filter plate 2 is horizontally arranged in the box 1. The prefilter assembly 4 is arranged in the box 1 and above the first filter plate 2, and the prefilter assembly 4 is used for performing preliminary filtration on bauxite and slurry mixture and screening out bauxite with larger volume.

When the bauxite is screened, an operator pours the mixture of the bauxite and the slurry into the box body 1 from the top opening of the box body 1, firstly, the mixture is subjected to preliminary filtration through the pre-filtration component 4, the bauxite with larger volume is screened out, then the rest bauxite and the slurry mixture flows to the first filter plate 2, wherein the slurry flows out from the bottom opening of the box body 1 through the first filter plate 2 to be collected, and the bauxite stays on the first filter plate 2, so that clean bauxite concentrate is obtained.

Referring to fig. 2 and 3, the first filter plate 2 is slidably connected to the case 1 with a sliding axis disposed vertically. Four first limiting blocks 11 are arranged in the box body 1, the four first limiting blocks 11 are fixedly connected with four side walls of the box body 1 respectively, and the four first limiting blocks 11 are located in the same horizontal plane and are located below the first filter plate 2. Four first springs 12 are arranged in the box body 1, the first springs 12 are in one-to-one correspondence with the first limiting blocks 11, the first springs 12 are vertically arranged between the first limiting blocks 11 and the first filter plates 2, and two ends of each first spring are fixedly connected with the first limiting blocks 11 and the first filter plates 2 respectively.

Referring to fig. 1 and 3, a driving assembly 3 is disposed on the case 1, the driving assembly 3 is disposed above the first filter plate 2, the driving assembly 3 is provided with two groups and is respectively disposed at both sides of the first filter plate 2, and the driving assembly 3 includes a first slider 31, a second slider 32, a first link 33, a third slider 34, a fourth slider 35, a second link 36, a motor 37, and a transmission member 38.

Referring to fig. 2 and 3, the first slider 31 abuts against the first filter plate 2, and the first slider 31 is slidably connected to the inner wall of the case 1. The second slider 32 is slidably connected to the case 1 with the sliding axis being arranged vertically. The two ends of the first connecting rod 33 are respectively hinged with the first sliding block 31 and the second sliding block 32, and the hinge axes are all horizontally arranged.

Referring to fig. 2 and 3, a third slider 34 is located above the first slider 31, and the third slider 34 is fixedly connected to the side wall of the case 1. The fourth slider 35 is slidably connected to the inner side wall of the case 1, in some embodiments, the fourth slider 35 and the side wall of the case 1 are attracted to each other by magnetic attraction, in other embodiments, an arc-shaped slot is formed in the side wall of the case 1, the fourth slider 35 slides along the slot, and the fourth slider 35 is located below the second slider 32. The two ends of the second connecting rod 36 are respectively hinged with the third sliding block 34 and the fourth sliding block 35, the middle part of the second connecting rod 36 is hinged with the middle part of the first connecting rod 33, the hinge axes are all horizontally arranged, and the length of the second connecting rod 36 is smaller than that of the first connecting rod 33. The motor 37 is fixedly arranged on the outer side wall of the box body 1, and an output shaft of the motor 37 is vertically arranged.

Referring to fig. 1 and 3, the transmission member 38 includes a reciprocating screw 381 and a screw nut 382. The reciprocating screw 381 is fixedly connected coaxially with an output shaft of the motor 37. Two sliding grooves are vertically formed in the side wall of the box body 1 and are respectively located on two sides of the first filter plate 2, and the sliding grooves correspond to the driving assemblies 3 one by one. The screw nut 382 is sleeved on the reciprocating screw 381, and the screw nut 382 and the reciprocating screw 381 are matched for use, and one end of the screw nut 382 is inserted into the sliding groove and fixedly connected with the second sliding block 32.

When bauxite is screened, the motor 37 is in a working state, the motor 37 drives the screw nut 382 to move up and down along the reciprocating screw 381, so that the second slide block 32 is driven to move up and down, the second slide block 32 drives the first connecting rod 33 to rotate, the first slide block 31 and the box body 1 slide relatively, the height of the first slide block 31 changes in the sliding process, when the height of the first slide block 31 is reduced, the first filter plate 2 compresses the first spring 12 to slide downwards, and when the height of the first slide block 31 is increased, the first filter plate 2 slides upwards to reset under the action of the first spring 12, so that the first filter plate 2 is always in an up-down reciprocating motion state.

Referring to fig. 2 and 3, a scraper 13 is fixedly disposed between the two first sliders 31, and the bottom of the scraper 13 abuts against the first filter plate 2. During the sliding of the first slider 31, when the side surface of the first slider 31 near the third slider 34 abuts against the side wall of the case 1, the first link 33 is in an inclined state. Two first discharge openings 14 are formed in the box body 1, the first discharge openings 14 are communicated with the inside of the box body 1, and the two first discharge openings 14 are oppositely arranged and are respectively located at two ends of the sliding direction of the scraping plate 13.

In the bauxite screening process, when the first sliding block 31 and the box body 1 slide relatively, the height of the first sliding block is changed along the vertical direction, and the first sliding block slides reciprocally along the first filter plate 2 in the horizontal direction, so that the scraping plate 13 is driven to slide reciprocally, and bauxite piled on the first filter plate 2 is discharged from the box body 1 through the first discharge openings 14 on two sides for collection.

Referring to fig. 2 and 3, a pre-filter assembly 4 is provided on the case 1, and the pre-filter assembly 4 includes a second filter plate 41, a second stopper 42, and a second spring 43. The number of the second filter plates 41 is smaller than that of the first filter plates 2, the second filter plates 41 are arranged above the second sliding blocks 32, the second filter plates 41 are hinged with the box body 1, and the hinge axes are horizontally arranged. The second limiting block 42 is located below the second filter plate 41, and the second limiting block 42 is fixedly connected with the inner side wall of the box body 1. The second spring 43 is vertically arranged between the second limiting block 42 and the second filter plate 41, and two ends of the second spring are fixedly connected with the second limiting block 42 and the second filter plate 41 respectively. When the second filter plate 41 is in the horizontal state, the second springs 43 are in the normal state. The box body 1 is provided with a second discharge opening 15, and the second discharge opening 15 is communicated with the inside of the box body 1.

When the bauxite is screened, after the operator pours the bauxite and slurry mixture into the box body 1 from the top opening of the box body 1, the bauxite and slurry mixture is prefiltered through the second filter plate 41, larger bauxite in the bauxite and slurry mixture stays on the second filter plate 41, and the rest bauxite and slurry mixture continuously flows downwards through the second filter plate 41 for subsequent secondary filtration. When the second slider 32 slides upwards under the drive of the screw nut 382, the second slider 32 will abut against one side of the second filter plate 41, so as to drive one end of the second filter plate 41 close to the second slider 32 to stretch the second spring 43 to rotate upwards, so that the second filter plate 41 tilts, and under the action of self gravity, bauxite accumulated on the second filter plate 41 slides from the second filter plate 41 to the second discharge port 15 to be discharged for collection. After the second slider 32 slides down under the drive of the screw nut 382, the second filter plate 41 is reset under the action of the second spring 43.

Referring to fig. 2 and 3, a first hinge plate 141 is provided at an opening of the first discharge port 14, the first hinge plate 141 is hinged with the case 1, and a hinge axis is horizontally provided, and the hinge is located at a top of the first discharge port 14. The opening part of the second discharge opening 15 is provided with a second hinged plate 151, the second hinged plate 151 is hinged with the box body 1, the hinge axis is horizontally arranged, and the hinge part is positioned at the top of the second discharge opening 15.

When the bauxite on the first filter plate 2 moves to the first discharge port 14 under the action of the scraper 13, the first hinge plate 141 rotates upwards to be opened under the pushing of the bauxite, and after the bauxite continues to move and is discharged from the first discharge port 14, the first hinge plate 141 rotates downwards to be closed under the action of self gravity. When the second filter plate 41 rotates to enable the bauxite on the second filter plate 41 to move to the second discharge port 15, the second hinge plate 151 rotates upwards to be opened under the pushing of the bauxite, and after the bauxite continues to move and is discharged from the second discharge port 15, the second hinge plate 151 rotates downwards to be closed under the action of self gravity.

The implementation principle of the vibration screening device for the aluminum ore pulp material is as follows:

when the bauxite is screened, after the bauxite and slurry mixture is poured into the box body 1 from the top opening of the box body 1, the bauxite and slurry mixture is prefiltered through the second filter plate 41, larger bauxite in the bauxite and slurry mixture stays on the second filter plate 41, the rest bauxite and slurry mixture continuously flows downwards to the first filter plate 2 through the second filter plate 41, wherein slurry flows out from the bottom opening of the box body 1 through the first filter plate 2 to be collected, and the bauxite stays on the first filter plate 2, so that clean bauxite concentrate is obtained.

When bauxite is screened, the motor 37 is in a working state, the motor 37 drives the reciprocating screw 381 to rotate, so that the screw nut 382 and the second sliding block 32 are driven to reciprocate up and down to perform linear motion, and after the second sliding block 32 moves to be abutted with the second filter plate 41, the second filter plate 41 is driven to rotate, and bauxite piled on the second filter plate 41 is discharged through the second discharge port 15. And the second slider 32 slides and drives the first connecting rod 33 to rotate, so as to drive the first slider 31 to slide, and when the first slider 31 slides, on one hand, the first filter plate 2 is driven to slide downwards and is matched with the first spring 12, so that the first filter plate 2 is always in an up-and-down reciprocating motion state. On the other hand, the scraper 13 is driven to slide reciprocally, and bauxite accumulated on the first filter plate 2 is discharged from the first discharge port 14 on both sides out of the tank 1.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. The utility model provides an aluminium ore pulp vibration screening device for material which characterized in that: comprises a box body (1) and a first filter plate (2); the box body (1) is vertically arranged, and the top and the bottom of the box body (1) are both of an opening structure; at least two first limiting blocks (11) are fixedly arranged in the box body (1); at least two first springs (12) are arranged in the box body (1), the first springs (12) are in one-to-one correspondence with the first limiting blocks (11), and the first springs (12) are fixedly arranged at the tops of the first limiting blocks (11); the first filter plate (2) is horizontally arranged in the box body (1) and is in sliding connection with the box body (1), and the bottom of the first filter plate (2) is fixedly connected with the top of the first spring (12); the box body (1) is provided with a driving assembly (3), and the driving assembly (3) is used for driving the first filter plate (2) to slide along the vertical direction.

2. A vibratory screening device for aluminum pulp as recited in claim 1, wherein: the driving components (3) are provided with two groups and are respectively positioned at two sides of the first filter plate (2); the driving assembly (3) comprises a first sliding block (31), a second sliding block (32), a first connecting rod (33), a third sliding block (34), a fourth sliding block (35), a second connecting rod (36), a motor (37) and a transmission part (38); the first sliding block (31) is abutted with the first filter plate (2), and the first sliding block (31) is in sliding connection with the box body (1); the second sliding block (32) is in sliding connection with the box body (1); two ends of the first connecting rod (33) are respectively hinged with the first sliding block (31) and the second sliding block (32); the third sliding block (34) is fixedly connected with the box body (1); the fourth sliding block (35) is in sliding connection with the box body (1); two ends of the second connecting rod (36) are respectively hinged with the third sliding block (34) and the fourth sliding block (35), and the second connecting rod (36) is hinged with the first connecting rod (33); the motor (37) is arranged on the box body (1); the transmission part (38) is arranged on the box body (1), and the transmission part (38) is used for transmitting power provided by the motor (37) to the second sliding block (32) and driving the second sliding block (32) to slide.

3. A vibratory screening device for aluminum pulp as recited in claim 2, wherein: the transmission part (38) comprises a reciprocating screw (381) and a screw nut (382); the reciprocating screw rod (381) is fixedly connected with the output shaft of the motor (37) in a coaxial way; the screw nut (382) is sleeved on the reciprocating screw (381) and is matched with the reciprocating screw; the screw nut (382) is fixedly connected with the second sliding block (32).

4. A vibratory screening device for aluminum pulp as recited in claim 2, wherein: a scraping plate (13) is fixedly arranged between the two first sliding blocks (31), and the scraping plate (13) is abutted with the first filter plate (2); a first discharge hole (14) is formed in the box body (1), and the first discharge hole (14) is communicated with the inside of the box body (1); the first discharge ports (14) are arranged at two ends of the first filter plate (2) respectively.

5. The vibratory screening device for aluminum slurry as recited in claim 4, wherein: when the side surface of the first sliding block (31) close to the third sliding block (34) and the side surface of the second sliding block (32) far away from the fourth sliding block (35) are positioned in the same vertical plane, the first connecting rod (33) is in an inclined state.

6. The vibratory screening device for aluminum slurry as recited in claim 4, wherein: the box body (1) is provided with a prefilter assembly (4), and the prefilter assembly (4) comprises a second filter plate (41), a second limiting block (42) and a second spring (43); the second filter plate (41) is arranged in the box body (1) and is positioned at the top of the second sliding block (32), the second filter plate (41) is hinged with the box body (1), and the filtering precision of the first filter plate (2) is greater than that of the second filter plate (41); the second limiting block (42) is positioned at the bottom of the second filter plate (41); two ends of the second spring (43) are fixedly connected with the second limiting block (42) and the second filter plate (41) respectively; the box body (1) is provided with a second discharge opening (15), and the second discharge opening (15) is communicated with the interior of the box body (1).

7. The vibratory screening device for aluminum pulp as recited in claim 6, wherein: a first hinge plate (141) is arranged at the opening of the first discharge opening (14), the first hinge plate (141) is hinged with the box body (1), and the hinge position is positioned at the top of the first discharge opening (14); the opening of the second discharge opening (15) is provided with a second hinged plate (151), the second hinged plate (151) is hinged with the box body (1), and the hinged position is positioned at the top of the second discharge opening (15).

8. A vibratory screening device for aluminum pulp as recited in claim 1, wherein: the bottom opening of the box body (1) is in a necking shape along the vertical downward direction.