CN218797475U - Free fall formula sorter - Google Patents

Abstract

The application discloses a free-fall separator, wherein a disk body is provided with a discharge port, and a rotating output shaft of a driving motor is in driving connection with the disk body; the identification component comprises an emission source and an arc detector, wherein the arc detector is positioned at the reflection position of the emission source; an annular gap is formed between the edge of the arc-shaped ejector and the inner wall of the shell; the ore collecting assembly comprises an ore collecting groove and a waste ore collecting groove, the ore collecting groove is positioned below the annular gap, and the waste ore collecting groove is positioned below the arc-shaped ejector; the stacking of the ores during the free falling motion can be avoided, so that the ore separation efficiency, the separation quality and the separation yield are improved; the size of the separator is reduced, and the miniaturization of equipment is facilitated; the method is beneficial to the collection and treatment of the sorted waste ores, and ensures the efficiency and effect of ore sorting and collection; the manufacturing cost is low, the energy consumption is low, the use cost is low, the failure rate is low, the maintenance cost becomes low, and the device is more suitable for users with small production quantity.

Description

Free fall formula sorter

Technical Field

The application relates to the technical field of material sorting equipment, in particular to a free-fall type sorting machine.

Background

At present, a sorting machine is widely used in social production, and identifies an object to be identified by using X-rays, a line camera, fluorescence, or the like, according to various physical characteristics of the object to be identified. The sorting machine with large yield generally comprises a belt conveyor, materials are conveyed to the lower part of a recognition element such as an X-ray source or a linear array camera by a belt for recognition, and fly away at the tail end of the belt conveyor and are separated by a sorting execution element, and the yield of the sorting machine is determined by the width of the belt and the speed of a driving motor.

For this type of sorting machine, when the sorting yield is small, a small-sized sorting machine is generally used. This kind of sorter cancels the belt feeder part, relies on the shale shaker to launch the ore to the pan feeding mouth to rely on the free fall motion of ore and the kinetic energy vector who launches to produce the parabola, shine and distinguish the sorting through materials such as X ray to the ore that is the parabola motion simultaneously, this kind of sorter is also called the chute machine.

Traditional spout machine utilizes discernment optical element such as X ray source, shines the parabola position that the ore was thrown and is fallen and discern, and this type sorter is in the use, because the volume of ore is different, and the air resistance that the ore received in the free fall motion process is different, so the ore whereabouts time is different, so lead to the ore to produce easily and pile up, influence separation effect.

SUMMERY OF THE UTILITY MODEL

The application provides a free-fall separator, which aims to avoid stacking of ores and influence on separation effect caused by different falling time of the ores due to different sizes of the ores and different air resistance borne by the free-fall separator in the free-fall movement process in the use process; the defect that ore stacking influences the sorting effect is overcome, and the sorting yield is effectively increased.

The application provides a free-fall separator, which comprises a barrel-shaped shell, wherein a disk body with an inner cavity, an identification component, an arc-shaped ejector and an ore collection component are arranged in the shell from top to bottom;

the tray body is provided with a discharge hole, and a rotating output shaft of the driving motor is in driving connection with the tray body;

the identification component comprises an emission source and an arc detector, and the arc detector is positioned at a reflection position of the emission source; the emission source is used for emitting a detection beam, the arc detector comprises at least two detection ports for receiving the detection beam, and the detection ports are distributed towards the center of an arc along the arc;

the arc-shaped ejector comprises at least two jet ports for ejecting high-pressure gas, and the jet ports are distributed along the arc back to the center of the arc-shaped circle; an annular gap is formed between the arc-shaped ejector edge and the inner wall of the shell;

the ore collection assembly comprises an ore collection groove and a waste ore collection groove, the ore collection groove is located below the annular gap, and the waste ore collection groove is located below the arc-shaped ejector.

Preferably, an ore conveying belt conveyor is arranged below the ore collecting groove.

Preferably, a waste ore conveying belt conveyor is arranged below the waste ore collecting tank.

Preferably, the tray body is cylindrical.

Preferably, the arc-shaped ejector comprises at least two valve plates which are sequentially connected into an arc-shaped structure, and the valve plates are provided with high-pressure air outlets and electromagnetic valves for controlling the on-off of air paths.

Preferably, the emission source and the arc detector are oppositely arranged on the inner wall of the shell.

Preferably, the arc-shaped injector is in a 360-degree circumferential blowing structure.

Preferably, the ore collecting groove is a circular groove.

Preferably, the waste ore collecting tank is a cylindrical groove.

Preferably, the arc detector is a 360-degree circumference detection structure, and the emission source is installed inside the shell.

The free fall formula sorter of this application can reach following beneficial effect at least:

1. according to the free-fall type sorting machine, the driving motor drives the disc body provided with the discharge port to rotate circumferentially, so that when ores fly out of the discharge port, the centrifugal circular motion is performed by taking the rotating output shaft of the driving motor as a central axis, the ores are scattered and fly out and fall, the ores are prevented from being stacked when the free-fall body moves, and the ore sorting efficiency, the sorting quality and the sorting yield are improved;

2. according to the free-fall type sorting machine, the detection signal convergence performance is improved through the arc-shaped detector, the distance between the emission source and the detector is effectively shortened, for example, the free-fall type sorting machine has good light convergence performance, and the distance between the X-ray machine and the detector can be effectively shortened, so that the size of the sorting machine can be reduced, and the miniaturization of equipment is facilitated;

3. according to the free-fall separator, the linear valve plate of the traditional ejector is machined into the arc-shaped ejector, so that the high-pressure air jet sprayed out of the jet orifice and the instantaneous plane in the motion process of the separated ore have a geometric relation which is more beneficial to ore separation, the ore separation efficiency is further improved, and the quality and the yield of ore separation production are ensured;

4. according to the free-fall separator, the ore receiving groove is formed below the annular gap between the arc-shaped ejector and the shell, so that separated ores are blown into the ore receiving groove through high-pressure air injection; the waste ore collecting tank positioned below the arc-shaped ejector is arranged on the inner side of the ore collecting groove, so that the sorted waste ore can be collected and processed conveniently, and the efficiency and the effect of ore sorting and collecting are ensured;

5. the free-fall type sorting machine can reduce the fluctuation of the flying amount and the flying instantaneous speed of the ore from the discharge port through the cylindrical disk body, namely reduce the difference between the flying amount and the flying instantaneous speed of the ore from the discharge port at different moments, and improve the stability of the flying amount and the flying instantaneous speed of the ore from the discharge port at different moments, thereby further avoiding the stacking of the ore when the free-fall moves and further improving the sorting efficiency and the sorting quality of the ore;

6. according to the free-fall type sorting machine, the motor can be driven by constant-speed rotation at a constant rotating speed, so that the motion of flying ores is very close to constant-speed circular motion, the arc lengths of the ores moving in any equal time are equal, stacking of the ores in free-fall motion is further avoided, and the ore sorting efficiency and sorting quality are further improved;

7. according to the free-fall separator, the ores can be comprehensively sprayed at 360 degrees without dead angles through the arc-shaped sprayer with the 360-degree circumferential spraying structure, the spraying effect of ore separation is improved, the ore separation omission is avoided, and the ore separation efficiency and effect are ensured;

8. according to the free-fall type sorting machine, the arc-shaped detector with the 360-degree circumference detection structure can be used for comprehensively detecting and sorting ores at 360 degrees without dead angles, so that the recognition effect of ore sorting is improved, the ore sorting omission is further avoided, and the ore sorting efficiency and effect are further ensured; meanwhile, the emission source arranged in the shell is matched, so that the whole structure of the sorting machine is more compact, and the whole miniaturization of equipment is facilitated;

9. the free-fall separator has the advantages of small volume and low manufacturing cost; the energy consumption is low, and the use cost is low; the fault rate is low, and cost of maintenance step-down is applicable to the low output user more.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic view of a free fall type chute machine in terms of structure and operation state;

FIG. 2 is a schematic illustration of the structure and principle of a free-fall sorter according to some embodiments of the present application;

FIG. 3 is a schematic optical path diagram of a free-fall sorter according to some embodiments of the present application;

FIG. 4 is a schematic view of an arc detector of the free-fall sorter of some embodiments of the present application;

FIG. 5 is a schematic illustration of an arcuate blower of a free-fall sorter according to some embodiments of the present application;

fig. 6 is a schematic view of an arc detector of the free-fall sorter according to some embodiments of the present application.

Reference numerals:

100 is a feeding port, 101 is a recognized material, 102 is an X-ray source, 103 is an air inlet system, 104 is an air inlet, 105 is a material distributing plate, 106 is a vein ore area, 107 is a waste ore area, 108 is a detection piece, 109 is a high-pressure injection system, and 110 is high-pressure gas;

the device comprises a shell 1, a disk body 2, a discharge hole 201, a driving motor 202, an arc-shaped ejector 3, a valve plate 301, a high-pressure air outlet 302, an electromagnetic valve 303, an ore centrifugal track 304, an ore injection track 305, an ore ejection track 306, an ore waste ejection track 307, an arc-shaped injection position 401, an emission source 402, an arc-shaped detector 402, a detection beam 403, a detection beam coverage area 404, an ore instantaneous plane 405, an ore receiving groove 501, an ore waste collecting groove 502, an ore conveying belt conveyor 601 and an ore conveying belt conveyor 602.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 1, in a free-fall chute, ore is ejected as identified material 101 through a vibrating screen into a feed port 100, causing the ore to fly out along a parabola as shown in fig. 1. The X-ray source 102 now emits X-rays that illuminate the ore and transmit identifying information to the opposite detector 108 to effect ore identification. The identified signal is transmitted to the high pressure jetting system 109, i.e., the sorting actuator. The high-pressure injection system 109 injects the ore by the high-pressure gas 110 to change the running track, as shown in fig. 1, after the ore falls, the ore finally falls to the gangue area 106 and the waste area 107 on both sides of the material separating plate 105. The high-pressure injection system 109 may be provided with an intake port 104, the intake port 104 being connected to the intake system 103.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

As shown in fig. 2, a free fall type separator comprises a barrel-shaped housing 1, wherein a plate body 2 with an inner cavity, an identification component, an arc-shaped ejector 3 and an ore collection component are arranged in the housing 1 from top to bottom;

the disc body 2 is provided with a discharge hole 201, and a rotating output shaft of the driving motor 202 is in driving connection with the disc body 2;

the identification assembly comprises an emission source 401 and an arc detector 402, wherein the arc detector 402 is positioned at the reflection position of the emission source 401; the emission source 401 is used for emitting a detection beam 403, and the arc detector 402 includes at least two detection ports for receiving the detection beam 403, and the detection ports are distributed along the arc toward the center of the arc;

the arc injector 3 comprises at least two injection ports for injecting high-pressure gas, and the injection ports are distributed along the arc back to the center of the arc; an annular gap is formed between the edge of the arc-shaped ejector 3 and the inner wall of the shell 1;

the ore collection assembly comprises an ore collection chute 501 and a waste collection chute 502, the ore collection chute 501 is located below the annular gap, and the waste collection chute 502 is located below the arc-shaped injector 3.

In the free fall type separator of the present embodiment, with reference to fig. 2 to 6, the housing 1 may be a barrel-shaped frame, and an ore collecting chute 501 and a waste collecting chute 502 may be provided at the bottom. When the ore enters the tray body 2, the driving motor 202 drives the tray body 2 to rotate, and the ore flying out from the discharge port 201 of the tray body 2 makes a centrifugal circular motion by taking a rotating output shaft of the driving motor 202 as a central axis, and is scattered and flying out along an ore centrifugal track 304 and falls down. The centrifugal instantaneous plane 405 of the ore lies within the probe beam coverage area 404 of the emission source 401. The ore is irradiated by a detection beam 403 emitted by an emission source 401, and the detection beam 403 after the ore is irradiated is received by an arc detector 402 on the opposite side of the emission source 401; a plurality of detection ports of the arc detector 402 are distributed towards the center of the arc along the arc, can comprehensively receive the detection beam 403 reflected in multiple directions by the ore, avoid omitting the detection beam 403, improve the comprehensive detection performance and the accuracy performance and ensure the detection effect. When the ore continuously falls, arc-shaped spraying is carried out by the arc-shaped spraying device 3 at the arc-shaped spraying position 307, a plurality of spraying openings distributed along the arc shape back to the arc-shaped circle center of the arc-shaped spraying device 3 can spray and separate the ore to the outer side more comprehensively at multiple angles, the ore to be separated is sprayed and falls to the ore receiving groove 501, the ore is prevented from being selected in a missing mode, and the ore separation effect is guaranteed; under the jetting effect of arc sprayer 3, the material ore falls along ore injection orbit 305, and the junked ore falls along junked ore injection orbit 306, realizes the separation of the material 101 ore of being discerned, avoids the ore to produce when the free fall motion and piles up to improve ore separation efficiency, sorting quality and sorting yield.

Referring to fig. 4, in the free-fall type sorting machine of the present embodiment, the arc detector 402 improves the detection signal convergence performance, and effectively shortens the distance between the emission source 401 and the arc detector 402. For example, when the emission source 401 is an X-ray machine, the X-ray machine has good light-collecting performance, and the distance between the X-ray machine and the arc detector 402 can be effectively shortened, so that the size of the sorting machine can be reduced, and the miniaturization of equipment is facilitated.

According to the free-fall type separator, the linear valve plate of the traditional ejector is machined into the arc-shaped ejector, so that the high-pressure jet ejected by the ejection port of the ejector has a geometric relation which is more beneficial to ore separation with the instantaneous plane in the movement process of the separated ore, namely, the high-pressure gas 110 more comprehensively passes through the instantaneous plane 405 of the ore, the high-pressure gas 110 is beneficial to fully jetting the ore, the ore separation efficiency is further improved, and the quality and the yield of ore separation production are ensured;

according to the free-fall type separator, the ore receiving groove 501 is formed below the annular gap between the arc-shaped ejector 3 and the shell 1, so that separated ores are blown into the ore receiving groove 501 through high-pressure air injection; through receiving the inboard waste ore collecting vat 502 that is located arc sprayer 3 below that sets up in the ore silo 501, can do benefit to the waste ore of sorting out and collect the processing, guarantee efficiency and the effect that the ore was selected separately and is collected.

In other embodiments, the plurality of detection ports of the arc detector 402 are evenly distributed along the arc toward the center of the arc. The probe port detects the probe beam 403 on the receiving inner side. The inner side refers to one side of the arc center direction which is distributed towards the detection port.

In addition, the plurality of detection ports of the arc detector 402 may also belong to a plurality of single detectors, respectively, that is, the arc detector 402 is formed by distributing a plurality of single detectors along an arc.

In other embodiments, the plurality of injection ports of the arc injector 3 are evenly distributed along the arc back to the center of the arc. The jet port jets high-pressure gas to the outside. The outer side here refers to the side away from the center of the arc of the injection orifice.

In addition, the plurality of detection ports of the arc injector 3 may also belong to a plurality of single injectors, respectively, that is, the arc injector 3 is formed by a plurality of single injectors distributed along an arc.

In some embodiments, an ore belt conveyor 601 is disposed below the ore receiving bin 501. A waste ore belt conveyor 602 is arranged below the waste ore collecting tank 502. The sorted ore passes through an ore collecting trough 501 and a waste ore collecting trough 502 and is transported away by corresponding belt conveyors at the bottoms of the ore collecting trough and the waste ore collecting trough respectively.

In some embodiments, the disk 2 is cylindrical. The purpose is to reduce the fluctuation of the ore flying out amount and the flying out instantaneous speed from the discharge port 201 at different moments, namely to reduce the difference change of the ore flying out amount and the flying out instantaneous speed from the discharge port 201 at different moments, and to improve the ore movement stability, thereby further avoiding the ore from stacking when moving in a free falling body, and further improving the ore sorting efficiency and sorting quality.

In other embodiments, the discharge port 201 is located at the edge of the tray body 2, so that the ore can fly out from the cavity in the tray body 2 through centrifugal movement of the discharge port 201, and the phenomenon that the ore leaves residual materials in the cavity in the tray body 1 is avoided.

In other embodiments, spout 201 is angled. Namely, an included angle theta is formed between the discharge port 201 and the horizontal plane, theta is more than 0 degree and less than 90 degrees, so that the inclined discharge port 201 can be matched with the centrifugal motion of the free falling body of the ore, and the ore is favorably flown out from the discharge port 201.

In other embodiments, discharge gate 201 is for leaking hopper-shaped, can do benefit to the processing and the installation of discharge gate 201 like this, equally do benefit to the ore from leaking hopper-shaped discharge gate 201 departure more.

In other embodiments, the rotation output shaft of the driving motor 202 is connected to the center of the disc body 2 in a driving manner, which facilitates the disc body 2 to rotate around the central axis thereof, thereby facilitating the ore to fly out from the inner cavity of the disc body 2 at a uniform speed and a uniform amount.

In other embodiments, the driving motor 202 is fixedly installed on the top surface of the housing 1 to facilitate the installation of the driving motor 202.

In other embodiments, the driving motor 202 is fixedly installed at the center of the top surface of the housing 1, so as to ensure the balance stability of the whole apparatus of the housing 1 and the sorting machine during the operation of the driving motor 202 to drive the disk 2 to rotate.

In other embodiments, the radiation source 401 is an X-ray machine, in which case the detection beam 403 is an X-ray beam and the arc detector 402 is an X-ray detector.

In other embodiments, the emission port of the emission source 401 and the receiving port of the arc detector 402 are located at the same horizontal plane to ensure that the arc detector 402 can sufficiently receive the detection beam 403 emitted from the emission port of the emission source 401.

Referring to fig. 5, in some embodiments, the arc injector 3 includes at least two valve plates 301 sequentially connected into an arc structure, and the valve plate 301 is provided with a high-pressure air outlet 302 and an electromagnetic valve 303 for controlling the on/off of an air path, which is a specific scheme for machining a straight-line valve plate of a conventional injector into an arc injector, and is more beneficial to improving ore separation efficiency, so as to ensure the quality and yield of ore separation production.

In other embodiments, the plurality of electromagnetic valves 303 of the plurality of valve plates 301 are uniformly distributed in an array shape to realize arc-shaped uniform injection of ores, so that the separation efficiency and the separation quality are improved.

In other embodiments, the valve plate 301 is an arc-shaped plate to facilitate the arc-shaped injection structure of the arc-shaped injector 3 to the ore.

In some embodiments, the emission source 401 and the arc detector 402 are installed opposite to each other on the inner wall of the housing 1, so as to facilitate the irradiation of the detection beam 403 emitted by the emission source 401 by the ore, ensure that the detection beam 403 after the irradiation of the ore is received by the arc detector 402 on the opposite side of the emission source 401, and facilitate the installation of the two.

In other embodiments, the emission port of the emission source 401 and the center point of the arc detector 402 are located on the same horizontal straight line, so as to ensure that the detection beam 403 emitted by the emission source 401 is sufficiently received by the arc detector 402 after irradiating ore, thereby avoiding the omission of ore detection.

In other embodiments, the rotational speed of the rotating output shaft of the drive motor 202 is constant such that the motion of the flying ore is very close to a uniform circular motion, and the arc lengths of the ore moving through at any equal time are equal, thereby further avoiding the ore from stacking during free fall motion and further improving ore separation efficiency and quality.

In some embodiments, the arc injector 3 is a 360-degree circumference injection structure, and then the arc injector 3 of the 360-degree circumference injection structure can comprehensively inject ores in 360 degrees without dead angles, so that the injection effect of ore separation is improved, the ore separation omission is avoided, and the ore separation efficiency and effect are ensured.

In other embodiments, the arc injector 3 is circular, that is, a plurality of valve plates 301 are connected in sequence to form a circular plate, so as to facilitate the formation of the arc injector 3 in a 360 ° circumferential blowing configuration.

In other embodiments, the annular space between 3 edges of arc sprayer and the 1 inner wall of shell is the ring shape, and 3 outer walls of arc sprayer can be the face of cylinder outer wall, and 1 inner wall of shell can be the drum inner wall, and the central axis of the two can coincide, improves the equilibrium stability of the whole equipment of sorter, also does benefit to and sets up collecting device below this space, does benefit to the ore whereabouts and collects.

In other embodiments, the central axes of the arc-shaped ejector 3 and the disk body 2 are coincided to form the same vertical line, so that the ore flying out of the cavity in the disk body 2 is favorably subjected to balanced blowing and sorting by the arc-shaped ejector 3, and the sorting quality is improved.

In some embodiments, the ore receiving chute 501 is an annular trough to facilitate the collection of ore falling from the gap between the edge of the arcuate jet 3 and the inner wall of the housing 1.

In some embodiments, the waste collection trough 502 is a cylindrical trough to facilitate collection of waste falling from below the arcuate jets 3.

In other embodiments, the outer wall of the inner side of the ore collecting groove 501 coincides with the outer wall of the waste ore collecting groove 502, so that the manufacturing and the installation of the ore collecting groove and the waste ore collecting groove are facilitated, the material is saved, the weight is reduced, and the miniaturization of equipment is facilitated.

In other embodiments, the central axes of the ore collecting chute 501 and the waste ore collecting chute 502 coincide to be the same vertical line, that is, the cross sections of the ore collecting chute 501 and the waste ore collecting chute 502 can be concentric circles, so as to improve the balance stability of the whole sorting equipment.

In some embodiments, the arc detector 402 is a 360-degree circumference detection structure, the emission source 401 is installed inside the housing 1, and can comprehensively detect and sort ores at 360 degrees without dead angles, so that the ore sorting identification effect is improved, ore sorting omission is further avoided, and the ore sorting efficiency and effect are further ensured; meanwhile, the emission source 401 arranged in the shell 1 is matched, so that the whole structure of the sorting machine is more compact, and the whole miniaturization of the equipment is more facilitated.

In other embodiments, the arc detector 402 is circular, the central axes of the arc detector 402, the emission source 401 and the arc ejector 3 are coincident to form a same vertical line, so that a 360-degree circumference detection structure of the arc detector 402 is formed, the arc detector 402 is ensured to fully receive the detection beam 403 emitted by the emission source 401 and irradiated with the ore, the arc ejector 3 is ensured to fully spray the ore irradiated by the detection beam 403, the separation is ensured to be full, and the separation reliability is ensured.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims (10)

1. A free-fall separator comprises a barrel-shaped shell (1), and is characterized in that a plate body (2) with an inner cavity, an identification component, an arc-shaped ejector (3) and an ore collection component are arranged in the shell (1) from top to bottom;

the disc body (2) is provided with a discharge hole (201), and a rotating output shaft of a driving motor (202) is in driving connection with the disc body (2);

the identification assembly comprises an emission source (401) and an arc detector (402), wherein the arc detector (402) is positioned at a reflection position of the emission source (401); the emission source (401) is used for emitting a detection beam (403), the arc detector (402) comprises at least two detection ports for receiving the detection beam (403), and the detection ports are distributed towards the center of an arc along the arc;

the arc-shaped ejector (3) comprises at least two ejection ports for ejecting high-pressure gas, and the ejection ports are distributed along the arc back to the center of the arc; an annular gap is formed between the edge of the arc-shaped ejector (3) and the inner wall of the shell (1);

the ore collection assembly comprises an ore collection trough (501) and a waste ore collection trough (502), the ore collection trough (501) is located below the annular gap, and the waste ore collection trough (502) is located below the arc-shaped ejector (3).

2. The free-fall sorter according to claim 1 wherein an ore belt conveyor (601) is provided below the ore receiving chute (501).

3. The free-fall sorter according to claim 1 wherein a scrap conveyor (602) is disposed below the scrap collector chute (502).

4. The free-fall sorter according to claim 1, wherein the tray (2) is cylindrical.

5. The free-fall sorter according to claim 1 wherein the arcuate jet (3) comprises at least two valve plates (301) connected in an arcuate configuration in series, the valve plates (301) being provided with a high pressure outlet (302) and a solenoid valve (303) for controlling the opening and closing of the pneumatic circuit.

6. The free-fall sorter according to claim 1, wherein the emission source (401) is mounted to an inner wall of the housing (1) opposite the arcuate detector (402).

7. The free-fall sorter according to claim 1 wherein the arcuate jets (3) are in a 360 ° circumferential blowing configuration.

8. The free-fall sorter according to claim 7 wherein the ore receiving chute (501) is a circular trough.

9. The free-fall sorter according to claim 7 wherein the waste collection chute (502) is a cylindrical trough.

10. The free-fall sorter according to claim 7, wherein the arc detector (402) is a 360 ° circumference detector structure, and the emission source (401) is installed inside the housing (1).

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