CN217569561U - High-efficient drum sieve for ore dressing - Google Patents

Abstract

The utility model discloses a high-efficient drum sieve for ore dressing, its technical scheme main points are: including the frame, install outer cylinder in the frame, outer cylinder is opened outward has outer sieve mesh, installs interior cylinder in the outer cylinder, interior cylinder is opened outward has than the big interior sieve mesh of outer sieve mesh diameter still includes: the first dredging component comprises a first dredging column arranged on the rack, one end of the first dredging column is elastically matched with the rack, and the first dredging column is used for pushing medium-sized gravels clamped on the outer sieve holes into the outer roller; the second mediation part, the second mediation part is including installing fly leaf in the frame, the fly leaf passes outer cylinder, the fly leaf has the second mediation post, the utility model provides a drum sieve for high-efficient ore dressing, the sieve mesh of cylinder and outer cylinder easily blocks up in aim at solves.

Description

High-efficient drum sieve for ore dressing

Technical Field

The utility model relates to a drum sieve equipment, in particular to high-efficient drum sieve for ore dressing.

Background

In current industrial application, the drum sieve is a mechanical equipment that sieves according to the difference of product specification, mainly used grit's separation, current drum sieve generally comprises outer cylinder and inner drum, the inner drum is used for loading the ore of waiting to filter, use middle pivot drive outer cylinder and inner drum to rotate, when beginning to filter, some medium size and tiny grit fall to the outer cylinder in from the sieve mesh of inner drum, tiny grit falls on outside material basin from the sieve mesh of outer drum, and then realize big, medium, little grit's separation, current drum sieve is in the use, because the shape of big grit is different, and the grit of upper strata has exerted gravity to the grit of lower floor, the sieve mesh of inner drum is blockked up to big grit, medium grit blocks up the sieve mesh of outer drum, influence screening efficiency.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a high-efficient drum sieve for ore dressing, aim at solve the problem that the sieve mesh of interior cylinder and outer cylinder easily blockked up.

The utility model provides an above-mentioned technical problem's technical scheme does:

the utility model provides a high-efficient drum sieve for ore dressing, includes the frame, installs outer cylinder in the frame, outer cylinder is opened outward has outer sieve mesh, installs interior cylinder in the outer cylinder, interior cylinder is opened outward has than outer sieve mesh diameter is big interior sieve mesh still includes:

the first dredging component comprises a first dredging column arranged on the rack, one end of the first dredging column is elastically matched with the rack, and the first dredging column is used for pushing medium-sized gravels clamped on the outer sieve holes into the outer roller;

the second dredging component comprises a movable plate installed on the rack, the movable plate penetrates through the outer roller, a second dredging column is arranged below the movable plate, one end of the second dredging column is elastically matched with the movable plate, when the inner roller rolls, the second dredging column moves along the outer edge of the inner roller in a circumferential surrounding mode, and the second dredging column is used for pushing large sand stones clamped on the inner sieve holes to the inside of the inner roller.

Further, in this application embodiment, the one end of outer cylinder has the opening, the one end that is close to outer cylinder open-ended of interior cylinder is equipped with keeps off the material plectane, keep off the diameter ratio of material plectane the diameter of interior cylinder is big, keep off the material plectane outer along with there is the free gap between being separated by in the interior edge of the opening one end of outer cylinder, the free gap is passed to the one end of fly leaf, and extends to inside the outer cylinder, the other end of fly leaf with the frame is fixed, the second mediation post is installed under the inside fly leaf of outer cylinder.

Further, in this application embodiment, the bottom surface shaping of first dredging post has first direction inclined plane, first direction inclined plane cooperatees with the direction of rolling of outer cylinder, the bottom surface shaping of second dredging post has second direction inclined plane, second direction inclined plane cooperatees with the direction of rolling of interior cylinder.

Further, in this application embodiment, transversely be equipped with first mounting bracket in the frame, the bottom surface of first mounting bracket is equipped with first spring vertically, the one end of first mediation post is installed under the first spring.

Further, in this application embodiment, the connecting plate is vertically equipped with under the first mounting bracket, the fly leaf is located the one end in the outside of outer cylinder with the connecting plate is fixed, the fly leaf is located the horizontal shaping of the one end of the inboard of outer cylinder has the second mounting bracket, the bottom surface of second mounting bracket is vertically equipped with the second spring, the one end of second mediation post is installed under the second spring.

Further, in this application embodiment, the other end of the second mounting bracket is provided with a ball, a guide groove in rolling fit with the ball is formed in the outer drum, and the guide groove is in a ring shape.

Further, in this application embodiment, the opening part of outer cylinder is equipped with keeps off the material ring, keep off the diameter ratio of material ring keep off the material plectane big, keep off the material plectane the edge with keep off the material ring one side inwards corresponding, the clearance is kept off the material ring and is kept off the space between the material plectane is separated by, the shape of fly leaf is the L type, wear out the horizontal one end of fly leaf the clearance exposes, the convex one end of fly leaf is located in the outer cylinder, the one end of second mounting bracket with the convex one end of fly leaf is fixed.

Further, in this application embodiment, outer drum is opened outward and is had first feed inlet, is equipped with mobilizable first feed gate in the first feed inlet.

Further, in this application embodiment, outer drum is opened outward has with first feed inlet corresponds the second feed inlet, is equipped with mobilizable second feeding door in the second feed inlet.

Furthermore, in the embodiment of the application, a driving motor for driving the outer roller and the inner roller to roll is arranged outside the rack, and a receiving tray for receiving small gravels is arranged on the bottom surface in the rack.

The utility model discloses following beneficial effect has: when outer cylinder and interior cylinder roll, because first dredging post and frame elastic fit, consequently at the rolling in-process of outer cylinder, pass the outer sieve mesh of outer cylinder in proper order, make the joint outside the inside of the medium-sized grit of sieve mesh is returned to outer sieve section of thick bamboo by the top, and interior cylinder, because second dredging post and fly leaf elastic fit, consequently including the rolling in-process of cylinder, pass the interior sieve mesh of interior cylinder in proper order, make the joint including the inside of the large-sized grit of sieve mesh is returned to interior sieve section of thick bamboo by the top, thereby outside the cylinder is selected to better in letting or little grit, let outside the outer cylinder is selected to little grit, the efficiency of ore dressing is improved.

Drawings

Fig. 1 is a schematic structural diagram of a drum screen for efficient ore dressing provided in an embodiment of the present application.

Fig. 2 is a schematic structural diagram of an outer drum and an inner drum provided in an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a first feed inlet and a second feed inlet provided in an embodiment of the present application.

Fig. 4 is a schematic structural diagram of a guide groove provided in an embodiment of the present application.

Fig. 5 is a structural schematic diagram of a first dredging component and a second dredging component provided by the embodiment of the application.

Fig. 6 is a schematic structural diagram of a first spring and a second spring provided in an embodiment of the present application.

Fig. 7 is a schematic diagram of a movable plate structure provided in the embodiment of the present application.

Fig. 8 is a schematic view of a ball structure provided in an embodiment of the present application.

Description of the reference numerals: 100. a frame; 110. an outer drum; 111. outer sieve pores; 120. an inner drum; 121. inner sieve pores; 130. a drive motor; 140. a first feed gate; 141. a first feed port; 150. a second feed gate; 151. a second feed port; 160. a material blocking ring; 170. a material blocking circular plate; 180. a take-up pan; 200. a first dredging member; 210. a first mounting cylinder; 220. a first spring; 230. a first dredging column; 231. a first guide slope; 240. a first mounting post; 250. a first mounting bracket; 300. a second dredging component; 310. a movable plate; 311. a clearance for movement; 320. a second mounting bracket; 330. a second mounting cylinder; 340. a second spring; 350. a second mounting post; 360. a second dredging column; 370. a second guide slope; 380. a ball bearing; 381. a movable barrel; 382. a fixing ring; 383. a guide groove; 390. a connecting plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically, electrically or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 to 8, a drum screen for efficient ore dressing includes a frame 100, an outer drum 110 installed in the frame 100, an outer screen hole 111 opened outside the outer drum 110, an inner drum 120 installed in the outer drum 110, an inner screen hole 121 opened outside the inner drum 120 and having a diameter larger than that of the outer screen hole 111, and further includes:

the first dredging component 200, the first dredging component 200 includes the first dredging column 230 mounted on framework 100, one end of the first dredging column 230 cooperates with framework 100 elastically, the first dredging column 230 is used for pushing the medium-sized sandstone stuck in the outer sieve pore 111 to the inside of the outer drum 110;

the second dredging component 300, the second dredging component 300 includes the fly leaf 310 installed on the frame 100, the fly leaf 310 passes through the outer drum 110, the second dredging column 360 is arranged under the fly leaf 310, one end of the second dredging column 360 is elastically matched with the fly leaf 310, when the inner drum 120 rolls, the second dredging column 360 makes a circumferential surrounding motion along the outer edge of the inner drum 120, and the second dredging column 360 is used for pushing the large sand clamped in the inner sieve mesh 121 to the inside of the inner drum 120.

Through the technical scheme, after interior cylinder 120 loaded the grit that needs the screening, start outer cylinder 110 and roll, outer cylinder 110 drives interior cylinder 120 and moves the roll, at the in-process that rolls, the size is well or little grit and passes through interior sifting hole 121 of interior cylinder 120, drop in outer cylinder 110, and well or little grit drops in outer cylinder 110 after, little grit again can be followed outer cylinder 110 and dropped outside and collected, thereby filter the size of grit, in the process of screening, because the shape of big grit is different, and gravity has been exerted to the grit of lower floor to the grit of upper strata, therefore, outer sieve mesh 111 of outer cylinder 110 is extremely easily blockked up by big grit, and it is difficult in time to dredge it to do not rely on outside pull throughs after blockking up, consequently, utilize first dredging post 230 and the elastic fit of second dredging post 360, make when outer cylinder 110 and inner drum 120 roll, first dredging post 230 and second dredging post 360 carry out the interlude motion to outer sieve mesh 111 and inner sieve mesh 121 along outer cylinder 110 and the rolling direction of inner drum 120 respectively in proper order, make big grit by in the top back inner drum 120, let the grit of medium shape by in the top back outer cylinder 110.

It is worth noting that there are some technical schemes that dredge inner sieve pores 121 and outer sieve pores 111 in the prior art, and it adopts the mode of driving the support pillar to dredge inner sieve pores 121 and outer sieve pores 111, but this kind of mode is because of having adopted driving device, and therefore the waste energy consumption is more, lead to the rising of processing cost, and the driving device fault rate is higher than the operation mode of pure machinery, therefore adopted the first dredging column 230 and the second dredging column 360 of elastic fit in the technical scheme of this application, consequently when dredging outer sieve pores 111 and inner sieve pores 121, can not increase the energy consumption, easy maintenance, also difficult part damages.

Referring to fig. 5, in some embodiments, an opening is formed at one end of the outer drum 110, the opening is shaped like a cylinder, a material blocking circular plate 170 is disposed at one end of the inner drum 120 close to the opening of the outer drum 110, the diameter of the material blocking circular plate 170 is greater than that of the inner drum 120, a movable gap 311 is formed between an outer edge of the material blocking circular plate 170 and an inner edge of the opening end of the outer drum 110, one end of a movable plate 310 penetrates through the movable gap 311 and extends into the outer drum 110, the other end of the movable plate 310 is fixed to the frame 100, and a second dredging column 360 is installed below the movable plate 310 inside the outer drum 110.

Through the above technical solution, when the outer roller 110 and the inner roller 120 roll, because the movable plate 310 is fixed on the frame 100 and passes through the movable gap 311 to reach the inside of the outer roller 110, the movable plate 310 does not roll along with the outer roller 110 and the inner roller 120 in the rolling process, and the outer edge of the inner roller 120 is circumferentially surrounded along with the rolling process, so that the second dredging columns 360 are sequentially inserted into the inner screen holes 121 of the inner roller 120 and dredge the same.

Referring to fig. 6, in some embodiments, the first dredging column 230 has a first guide slope 231 formed on a bottom surface thereof, the first guide slope 231 matches with the rolling direction of the outer drum 110, and the second dredging column 360 has a second guide slope 370 formed on a bottom surface thereof, the second guide slope 370 matches with the rolling direction of the inner drum 120.

Through the above technical solution, since the bottom surface of the first dredging column 230 is the first guiding inclined surface 231, the bottom surface of the second dredging column 360 is the second guiding inclined surface 370, and the lowest point of the two inclined surfaces is consistent with the rolling direction of the outer drum 110 and the inner drum 120, when the first guiding inclined surface 231 and the second guiding inclined surface 370 roll to the outer sieve holes 111 and the inner sieve holes 121, the first dredging column 230 and the second dredging column 360 are inserted into the outer sieve holes 111 and the inner sieve holes 121, and along with the guiding of the inclined surfaces, the first dredging column 230 and the second dredging column 360 are separated from the outer sieve holes 111 and the inner sieve holes 121 under the elastic effect, so as to dredge the next row of the outer sieve holes 111 and the inner sieve holes 121.

Further, referring to fig. 6, in some embodiments, the shapes of the first guiding inclined plane 231 and the second guiding inclined plane 370 may be replaced by rhomboid columns or spheres or a scheme that the cross section is an equilateral triangle, and the shapes described above may better cope with the situation that the outer roller 110 and the inner roller 120 change to the opposite rolling directions, for example, clockwise rolling changes to counterclockwise rolling and counterclockwise rolling changes to clockwise rolling, so that the first dredging column 230 and the second dredging column 360 may better separate from the outer sieve aperture 111 and the inner sieve aperture 121 when the outer roller 110 and the inner roller 120 change the rolling directions, and both rolling directions may separate from the outer sieve aperture 111 and the inner sieve aperture 121.

Referring to fig. 5 to 7, in some embodiments, a first mounting frame 250 is transversely disposed on the rack 100, a first mounting cylinder 210 is vertically welded on a bottom surface of the first mounting frame 250, a first spring 220 in threaded fit with an inner wall of the first mounting cylinder 210 penetrates through an inner wall of the first mounting cylinder 210, a first mounting column 240 penetrates through an inner wall of a lower end of the first spring 220, an outer wall of the first mounting column 240 is in threaded fit with an inner wall of a lower end of the first spring 220, a diameter of the first mounting column 240 is smaller than a diameter of the first dredging column 230, and a lower end of the first mounting column 240 is integrally formed with an upper end of the first dredging column 230.

Through above-mentioned technical scheme, the spring has been selected for use in first mediation post 230's elastic fit, utilizes the elasticity of first spring 220 for the outer edge of outer cylinder 110 is pasted all the time to first mediation post 230's lower extreme, after outer sieve mesh 111 of outer cylinder 110 rolled the lower extreme of first mediation post 230, first mediation post 230 is because the elasticity of first spring 220, and the well gravel and sand of feasible outer sieve mesh 111 is rebounded inside outer cylinder 110.

Further, referring to fig. 6, in some embodiments, the first spring 220 may be changed to a soft glue or other elastic material, but since the soft glue needs to be fixed by adhesion, it is inconvenient to replace the soft glue when the soft glue is damaged, and therefore, the spring is used as a component, and a single component can be detached and installed more conveniently after being damaged.

Referring to fig. 5 to 7, in some embodiments, a connecting plate 390 is vertically welded below the first mounting bracket 250, one end of the movable plate 310, which is located at the outer side of the outer drum 110, is fixed to the connecting plate 390, a second mounting bracket 320 is transversely formed at one end of the movable plate 310, which is located at the inner side of the outer drum 110, a second mounting barrel 330 is vertically welded to the bottom surface of the second mounting bracket 320, a second spring 340 is threaded on the inner wall of the second mounting barrel 330 and is in threaded fit with the inner wall of the second mounting barrel 330, a second mounting post 350 is threaded on the inner wall of the lower end of the second spring 340, the diameter of the second mounting post 350 is smaller than that of the second dredging post 360, and the lower end of the second mounting post 350 is integrally formed with the upper end of the second dredging post 360.

Through the technical scheme, connecting plate 390 has been welded under first mounting bracket 250, connecting plate 390 is fixed with fly leaf 310, thereby when inner drum 120 and outer drum 110 are rolling, fly leaf 310 can not roll along with inner drum 120 and outer drum 110 yet, let second dredging post 360 remain to cooperate inner drum 120 all the time, the spring has been chooseed for use as the part to the elastic fit of second dredging post 360, utilize the elasticity of second spring 340, make the outer edge of inner drum 120 is being pasted all the time to the lower extreme of second dredging post 360, after inner screen hole 121 of inner drum 120 rolled the lower extreme of second dredging post 360, second dredging post 360 is because the elasticity of second spring 340, make the big grit of inner screen hole 121 bounce inside outer drum 110.

Referring to fig. 5 to 8, in some embodiments, the other end of the second mounting bracket 320 is provided with a movable cylinder 381, a ball 380 which is in rolling fit with the movable cylinder 381 is arranged in the movable cylinder 381, a fixed ring 382 which is in threaded fit with an inner cylinder of the movable cylinder 381 is further arranged in the movable cylinder 381, the diameter of the ball 380 is smaller than that of the movable cylinder 381, one side of the ball 380 protrudes out of an inner ring of the fixed ring 382, a guide groove 383 which is in rolling fit with the ball 380 is formed in the outer drum 110, and the guide groove 383 is in a circular ring shape.

Through the technical scheme, because one side of the second mounting rack 320, which is positioned in the outer roller 110, is suspended without supporting parts, the second dredging column 360 is led to be plugged, the second mounting rack 320 is unstable, and the dredging of the second dredging column 360 is influenced, so that the ball 380 and the guide groove 383 are arranged, when the outer roller 110 and the inner roller 120 roll, the other side of the second mounting rack 320 can be in rolling fit with the guide groove 383 through the ball 380, and the stability of the second mounting rack 320 is enhanced.

Referring to fig. 2 to 5, in some embodiments, a baffle ring 160 is disposed at an opening of the outer drum 110, a diameter of the baffle ring 160 is larger than a diameter of the baffle circular plate 170, an edge of the baffle circular plate 170 corresponds to an inward surface of the baffle ring 160, a movable gap 311 is a space between the baffle ring 160 and the baffle circular plate 170, the movable plate 310 is L-shaped, a transverse end of the movable plate 310 penetrates through the movable gap 311 and is exposed, a protruding end of the movable plate 310 is located in the outer drum 110, and an end of the second mounting bracket 320 is fixed to the protruding end of the movable plate 310.

Through the technical scheme, in order to avoid the grit to follow a large amount of outflow of activity clearance 311, consequently, keep off material ring 160 and keep off material plectane 170 has been set up, and keep off the edge of material plectane 170 and keep off the material one side of ring 160 corresponding inwards, thereby reduce the grit and can directly pass through the space of activity clearance 311, keep off material ring 160 and can block the grit that is in the opening edge of outer cylinder 110, keep off material plectane 170 and can block the grit that drops outer cylinder 110 from inner drum 120, thereby when guaranteeing to let second dredge post 360 work, also hinder outer cylinder 110 and inner drum 120's screening work.

Referring to fig. 1-3, in some embodiments, the outer drum 110 is provided with a first inlet port 141, and a movable first inlet door 140 is disposed in the first inlet port 141.

Referring to fig. 1 to 3, in some embodiments, a second feed opening 151 corresponding to the first feed opening 141 is formed outside the inner drum 120, and a movable second feed door 150 is disposed inside the second feed opening 151.

Through the technical scheme, when sand is loaded, the first feeding door 140 and the second feeding door 150 are opened, so that the first feeding hole 141 of the outer roller 110 is communicated with the second feeding hole 151 of the inner roller 120, sand to be screened is filled in the inner roller 120, and the first feeding door 140 and the second feeding door 150 can lock the doors in a screw fixing mode.

Referring to fig. 1, in some embodiments, a driving motor 130 for driving an outer roller 110 and an inner roller 120 to roll is disposed outside a rack 100, and a receiving tray 180 for receiving small sand is disposed on the inner bottom surface of the rack 100.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The utility model provides a high-efficient drum sieve for ore dressing, includes frame (100), installs outer cylinder (110) in frame (100), outer cylinder (110) are opened outward and are had outer sieve mesh (111), install interior cylinder (120) in outer cylinder (110), interior cylinder (120) are opened outward and are had than interior sieve mesh (121) that outer sieve mesh (111) diameter is big, its characterized in that still includes:

the first dredging component (200), the first dredging component (200) comprises a first dredging column (230) installed on the rack (100), one end of the first dredging column (230) is elastically matched with the rack (100), and the first dredging column (230) is used for pushing medium-sized sand clamped in the outer sieve hole (111) to the inside of the outer drum (110);

second mediation part (300), second mediation part (300) is including installing fly leaf (310) on frame (100), fly leaf (310) pass outer cylinder (110), fly leaf (310) have second mediation post (360), the one end of second mediation post (360) with fly leaf (310) elastic fit, work as when the roll of inner drum (120), second mediation post (360) are followed the outer edge of inner drum (120) is made the circumference and is encircleed the motion, second mediation post (360) are used for the card and are in the large-scale grit of inner mesh (121) pushes away the inside of inner drum (120).

2. The trommel screen for the high-efficiency ore dressing according to claim 1, characterized in that one end of the outer drum (110) is provided with an opening, one end of the inner drum (120) close to the opening of the outer drum (110) is provided with a material blocking circular plate (170), the diameter of the material blocking circular plate (170) is larger than that of the inner drum (120), a movable gap (311) is arranged between the outer edge of the material blocking circular plate (170) and the inner edge of one end of the opening of the outer drum (110), one end of the movable plate (310) passes through the movable gap (311) and extends into the outer drum (110), the other end of the movable plate (310) is fixed with the frame (100), and the second dredging column (360) is installed below the movable plate (310) in the outer drum (110).

3. The drum screen for efficient ore dressing according to claim 2, wherein the bottom surface of the first dredging column (230) is formed with a first guiding inclined surface (231), the first guiding inclined surface (231) is matched with the rolling direction of the outer drum (110), the bottom surface of the second dredging column (360) is formed with a second guiding inclined surface (370), and the second guiding inclined surface (370) is matched with the rolling direction of the inner drum (120).

4. A drum screen for efficient ore dressing according to claim 3, wherein a first mounting frame (250) is transversely arranged on the frame (100), a first spring (220) is vertically arranged on the bottom surface of the first mounting frame (250), and one end of the first dredging column (230) is arranged below the first spring (220).

5. The drum screen for efficient ore dressing according to claim 4, wherein a connecting plate (390) is vertically arranged below the first mounting frame (250), one end of the movable plate (310) located at the outer side of the outer drum (110) is fixed to the connecting plate (390), a second mounting frame (320) is transversely formed at one end of the movable plate (310) located at the inner side of the outer drum (110), a second spring (340) is vertically arranged on the bottom surface of the second mounting frame (320), and one end of the second dredging column (360) is arranged below the second spring (340).

6. A drum screen for efficient ore dressing according to claim 5, characterized in that the other end of the second mounting frame (320) is provided with a ball (380), a guide groove (383) which is matched with the ball (380) in a rolling manner is formed in the outer drum (110), and the guide groove (383) is in a ring shape.

7. The trommel screen for high-efficiency ore dressing according to claim 5, characterized in that a baffle ring (160) is arranged at the opening of the outer drum (110), the diameter of the baffle ring (160) is larger than that of the baffle circular plate (170), the edge of the baffle circular plate (170) corresponds to the inward surface of the baffle ring (160), the movable gap (311) is the space between the baffle ring (160) and the baffle circular plate (170), the movable plate (310) is L-shaped, the transverse end of the movable plate (310) penetrates through the movable gap (311) and is exposed, the protruding end of the movable plate (310) is positioned in the outer drum (110), and the protruding end of the second mounting frame (320) is fixed with the protruding end of the movable plate (310).

8. A drum screen for efficient ore dressing according to claim 1, wherein a first feed opening (141) is formed outside the outer drum (110), and a movable first feed door (140) is arranged in the first feed opening (141).

9. The rotary screen for efficient ore dressing according to claim 8, wherein a second feed port (151) corresponding to the first feed port (141) is formed outside the inner rotary drum (120), and a movable second feed door (150) is arranged in the second feed port (151).

10. A drum screen for efficient ore dressing according to claim 1, characterized in that a driving motor (130) for driving the outer drum (110) and the inner drum (120) to roll is arranged outside the frame (100), and a receiving tray (180) for receiving small sand is arranged on the inner bottom surface of the frame (100).

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