Friction dry separation device and separation method for fine-grained talc ore

Abstract

The invention relates to the technical field of mineral separation experimental equipment, in particular to a friction dry separation device for fine-grain talc ores, which comprises a feeding hopper arranged at the head of the friction dry separation device, the feeding hopper is connected above a belt device, the belt device runs from the head of the friction dry separation device to the tail of the friction dry separation device, and the belt device is supported on a sliding support. The sliding support is slidably connected with the slideway frame, the slideway frame is connected with the sliding support through a reset spring, a variable speed driving device is arranged between the slideway frame and the sliding support, one side of the bottom of the slideway frame is movably connected with the base through a hinge piece, and the other side of the bottom of the slideway frame is movably connected with a lifting mechanism used for adjusting the inclination angle of the belt device. And a receiving device is arranged on the outer side of the belt device opposite to the feeding hopper. The device has the advantages of high production efficiency and good product quality.

Description

Technical Field

[0001] The invention belongs to the technical field of mineral processing experimental equipment, and in particular relates to a friction dry separation device for fine-grained talc ore. Background Art

[0002] Talc is an important mineral resource in my country, widely used in papermaking, plastics, paints, coatings, ceramics, medicine and food. With the mining of mineral resources year by year, the grade of talc is getting lower and lower. The purity of natural talc is generally 40%-80%. Therefore, the purification of natural talc has become an important link in the development of talc mining enterprises in my country. Only 20%-50% of the mined talc is a lump larger than 15mm, while 50%-80% is a small talc particle or powder less than 15mm. At present, most domestic enterprises mainly use manual selection for talc sorting, which is labor-intensive, low in efficiency, poor in precision and high in production cost. For particles of 7-15mm, photoelectric selection using near-infrared technology requires large preparation investment and high beneficiation cost. For particles smaller than 7mm, neither manual selection nor photoelectric selection can obtain good indicators. The flotation method generally processes fine-grained pulp below 0.1mm, which needs to be ground, that is, completed under the action of flotation agents. The flotation of talc ore is a process of more flotation and less suppression, which has the problems of high cost, high concentrate yield, and sticky foam. In addition, the flotation concentrate has the problems of difficult solid-liquid separation and low whiteness. The flotation process has the problems of large investment, complex operation, low sorting precision, land occupation by tailings and environmental pollution. As a result, flotation technology is difficult to promote and apply in the talc industry. At the same time, about 50% of small talc is treated as tailings or used as non-functional raw materials at a low price every year. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a friction dry separation device for fine-grained talc ore, which can effectively separate the difficult-to-separate fine-grained talc ore with a diameter of 3-7 mm.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A friction dry separation device for fine-grained talc ore comprises a feeding hopper arranged at the head of the friction dry separation device, the feeding hopper is connected above a belt device, the running direction of the belt device is from the head to the tail of the friction dry separation device, the belt device is supported on a sliding bracket, the sliding bracket is slidably connected to a slideway frame, the slideway frame is connected to the sliding bracket through a reset spring, a variable speed drive device is provided between the slideway frame and the sliding bracket, one side of the bottom of the slideway frame is movably connected to the base through a hinge, and the other side is movably connected to a lifting mechanism for adjusting the inclination angle of the belt device, and a material receiving device is provided on the outer side of the belt device opposite to the feeding hopper.

[0006] The belt device includes a belt bracket, and the two sides of the belt bracket are respectively connected to the belt conveyor driving wheel bracket and the belt conveyor driven wheel bracket, the belt conveyor driving wheel bracket is connected to the belt conveyor driving wheel, the belt conveyor driven wheel bracket is connected to the belt conveyor driven wheel, the belt is wrapped around the belt conveyor driving wheel and the belt conveyor driven wheel, and the belt conveyor driving wheel is connected to the belt drive motor.

[0007] The distance between the driving wheel and the driven wheel of the belt conveyor is 2-4m.

[0008] The adjustable range of the inclination angle of the belt device is 15°-40°.

[0009] The variable speed drive device comprises a variable speed drive motor, which is connected to the slideway frame. The output shaft of the variable speed drive motor is connected to a cam, and the edge of the cam is movably connected to the edge of the sliding bracket.

[0010] The lifting mechanism is a screw lift.

[0011] The material receiving device includes a material receiving chute bracket, a bracket crossbeam, a fixed material receiving chute, a butterfly sliding chute, a concentrate receiving tray, and a tailings receiving tray; the bottoms of both ends of the bracket crossbeam are connected to the material receiving chute bracket, the tops of both ends of the bracket crossbeam are connected to the fixed material receiving chute, the butterfly sliding chute is slidably connected on the bracket crossbeam, and a concentrate receiving tray and a tailings receiving tray are respectively provided on the ground below both sides of the butterfly sliding chute.

[0012] A sorting method of a friction dry sorting device for fine-grained talc ore: used for sorting 3-7 mm fine-grained talc ore, specifically comprising:

[0013] 1) Crushing the talc ore and screening out 3-7mm fine talc ore;

[0014] 2) Adjust the lifting mechanism to tilt the belt device;

[0015] 3) Start the belt drive motor and adjust the belt speed;

[0016] 4) Start the variable speed drive device, the variable speed drive motor drives the cam to rotate, the cam pushes the sliding bracket close to it to move, and under the joint action of the return spring, the sliding bracket performs variable speed reciprocating motion in the slideway frame, thereby driving the belt device to perform periodic variable speed reciprocating motion;

[0017] 5) The belt device performs periodic variable speed reciprocating motion, and the belt rotates at a constant speed. The two forms of motion are superimposed to form periodic variable speed linear motion, which can generate acceleration;

[0018] 6) The material is discharged from the feeding hopper onto the inclined belt surface. The material particles begin to slide downward under the action of gravity and friction, and move horizontally driven by the belt. The talc material particles with small friction force move downward at a faster speed, and the material particles with large friction force move horizontally at a faster speed. At the same time, under the acceleration generated by the periodic variable speed linear motion, the material particles with a larger friction coefficient are subjected to a larger horizontal friction force and move horizontally faster. The periodic variable speed linear motion can expand the speed difference of the horizontal movement of material particles with different friction coefficients;

[0019] 7) There will be an obvious dividing zone between talc and other materials on the belt surface. Slide the butterfly sliding chute below the dividing zone. The talc particles with a small friction coefficient are relatively concentrated in the middle of the belt side and discharged into the concentrate receiving tray. The material particles with a large friction coefficient are concentrated on the side of the belt close to the driving wheel of the belt conveyor and discharged into the tailings receiving tray.

[0020] Step 2) The initial adjustment angle of the belt device is 30°±1° to allow the material to slide off.

[0021] Step 3) The belt speed is controlled at 0.2m / s-1.5m / s.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present application is used for dry sorting of 3-7mm fine-grained talc ore using the friction sorting principle. The present application belt device performs periodic variable speed reciprocating motion, and the belt rotates at a uniform speed. The two motion forms are superimposed to form periodic variable speed linear motion, and the periodic variable speed linear motion can generate acceleration; the friction coefficient of the target mineral talc and the gangue minerals such as magnesite and quartz in the talc ore is different, so the friction force on the inclined surface is different to achieve the separation of the target mineral and the gangue mineral. The material to be selected is sent to the rotating belt surface through the feed hopper, and the belt transmission plays a role in dispersion and driving. The material is subjected to gravity along the inclined direction, friction and inertia on the belt. The talc with a small friction coefficient is subjected to a force greater than the friction force along the inclined direction, and falls into the concentrate receiving tray along the inclined surface, while the gangue mineral with a large friction coefficient, its friction force is greater than the gravity force along the inclined surface and is transported with the belt and falls into the tailings receiving tray. The periodic variable speed linear motion can expand the speed difference of the horizontal movement of material particles with different friction coefficients, so that the talc with a small friction coefficient can be separated from the gangue mineral with a large friction coefficient.

[0024] In many non-ferrous metal ores, such as non-ferrous metal molybdenum, nickel and other ores, one of the main gangue minerals is talc, which has a different friction coefficient from the target mineral or other gangue minerals. This technology can be used to separate talc from other minerals; this technology can realize the dry separation of different minerals with different friction coefficients in the ore.

[0025] The invention has the characteristics of high production efficiency, good product quality, high production automation, stable operation, strong adaptability, and low environmental pollution, and has wide practical value and promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention.

[0027] Figure 2 It is a structural side view of the present invention.

[0028] Figure 3 It is the DD section view.

[0029] Figure 4 It is a structural schematic diagram of the material receiving device.

[0030] In the figure: 1. feeding hopper, 2. belt device, 3. belt conveyor driving wheel, 4. belt conveyor driving wheel bracket, 5. belt conveyor driven wheel, 6. belt conveyor driven wheel bracket, 7. belt bracket, 8. belt, 9. belt drive motor, 10. sliding bracket, 11. slideway frame, 12. return spring, 13. belt inclination adjustment hand wheel, 14. screw, 15. worm gear mechanism, 16. lifting screw, 17. variable speed drive motor, 18. cam, 19. base, 20. receiving chute bracket, 21. bracket crossbeam, 22. fixed receiving chute, 23. butterfly sliding chute, 24. concentrate receiving tray, 25. tailings receiving tray, 26. slider. DETAILED DESCRIPTION

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means more than two.

[0032] Unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0033] like Figure 1-Figure 4 A friction dry separation device for fine-grained talc ore includes a feeding hopper 1 arranged at the head of the friction dry separation device, the feeding hopper 1 is connected above a belt device 2, the running direction of the belt device 2 is from the head to the tail of the friction dry separation device, the belt device 2 is supported on a sliding bracket 10, the sliding bracket 10 is slidably connected to a slide frame 11, the slide frame slide 11 is connected to the sliding bracket 10 through a reset spring, a variable speed drive device is provided between the slide frame slide 11 and the sliding bracket 10, one side of the bottom of the slide frame slide 11 is movably connected to a base 19 through a hinge, and the other side is movably connected to a lifting mechanism for adjusting the inclination angle of the belt device 2, and a material receiving device is provided on the outer side of the belt device 2 on the opposite side of the feeding hopper 1.

[0034] The belt device 2 includes a belt bracket 7, and the two sides of the belt bracket 7 are respectively connected to the belt conveyor driving wheel bracket 4 and the belt conveyor driven wheel bracket 6, the belt conveyor driving wheel bracket 4 is connected to the belt conveyor driving wheel 3, the belt conveyor driven wheel bracket 6 is connected to the belt conveyor driven wheel 5, the belt conveyor driving wheel 3 and the belt conveyor driven wheel 5 are wrapped with a belt 8, and the belt conveyor driving wheel 3 is connected to a belt drive motor 9.

[0035] The distance between the driving wheel and the driven wheel of the belt conveyor is 2-4m.

[0036] The adjustable range of the inclination angle of the belt device 2 is 15°-40°.

[0037] The variable speed drive device comprises a variable speed drive motor, which is connected to the slideway frame slide 11 , and a cam is connected to the output shaft of the variable speed drive motor, and the edge of the cam is movably connected to the edge of the sliding bracket 10 .

[0038] The lifting mechanism includes a belt inclination adjustment hand wheel 13, a screw 14, a worm gear mechanism 15 and a lifting screw 16.

[0039] The material receiving device includes a material receiving chute bracket 20, a bracket cross beam 21, a fixed material receiving chute 22, a butterfly sliding chute 23, a concentrate receiving tray 24, and a tailings receiving tray 25; the bottoms of both ends of the bracket cross beam 21 are connected to the material receiving chute bracket 20, the tops of both ends of the bracket cross beam 21 are connected to the fixed material receiving chute 22, the butterfly sliding chute 23 is slidably connected on the bracket cross beam 21, and a concentrate receiving tray 24 and a tailings receiving tray 25 are respectively provided on the ground below both sides of the butterfly sliding chute 23.

[0040] Working principle of belt friction separation: the target mineral talc and gangue minerals such as magnesite and quartz in talc ore have different friction coefficients, so the friction forces on the inclined surface are different to achieve the separation of the target mineral talc and gangue minerals. After the belt 8 is running, the material to be selected is fed to the inclined belt 8 surface through the feeding hopper 1. The belt 8 transmission plays a role of dispersion and driving. The material on the belt is subjected to the force of gravity along the inclined direction, friction and inertia. The talc with a small friction coefficient is subjected to a force along the inclined direction greater than the friction force, and falls into the concentrate receiving bin 24 along the inclined surface, while the gangue mineral with a large friction coefficient has a friction force greater than the force of gravity along the inclined surface and falls into the tailings receiving bin 25 along the belt.

[0041] A sorting method of a fine-grained talc ore friction dry sorting device: used for sorting 3-7 mm fine-grained talc ore, specifically comprising:

[0042] 1) Crushing the talc ore and screening out 3-7mm fine talc ore;

[0043] 2) adjusting the lifting mechanism to tilt the belt device 2;

[0044] 3) Start the belt drive motor 9 and adjust the speed of the belt 8;

[0045] 4) Start the variable speed drive device, the variable speed drive motor 17 drives the cam 18 to rotate, the cam 18 pushes the sliding bracket 10 close to it to move, and under the joint action of the return spring 12, the sliding bracket 10 performs variable speed reciprocating motion in the slideway frame 11, thereby driving the belt device 2 to perform periodic variable speed reciprocating motion;

[0046] 5) The belt device 2 performs periodic variable speed reciprocating motion, and the belt 8 rotates at a constant speed. The two motion forms are superimposed to form a periodic variable speed linear motion. The variable speed motion form is adjusted by changing the shape of the cam 8, and the periodic variable speed frequency is adjusted by changing the speed of the variable speed drive motor 17. The periodic variable speed linear motion can generate forward acceleration;

[0047] 6) The material is discharged from the feed hopper 1 to the inclined belt 8 surface. The material particles begin to slide downward under the action of gravity and friction, and move horizontally driven by the belt 8. The talc material particles with small friction force move downward at a faster speed, and the material particles with large friction force move horizontally at a faster speed. At the same time, under the forward acceleration generated by the periodic variable speed linear motion, the material particles with a larger friction coefficient are subjected to a larger horizontal friction force and move horizontally faster. The periodic variable speed linear motion can expand the speed difference of the horizontal movement of material particles with different friction coefficients;

[0048] 7) There will be an obvious dividing zone between talc and other materials on the surface of the belt 8. Slide the butterfly sliding chute 23 below the dividing zone. The talc particles with a small friction coefficient are relatively concentrated in the middle of the belt side and discharged into the concentrate receiving tray 24; the material particles with a large friction coefficient are concentrated on the side of the belt close to the driving wheel of the belt conveyor and discharged into the tailings receiving tray 25.

[0049] In the step 2), the initial adjustment angle of the belt device 2 is 30°±1°; the friction angle of talc is generally around 28°, and the friction angle of quartz and magnesite is generally 34°-35°. The belt inclination angle can be pre-adjusted to 30°±1°, at which time the talc can slide down, and other minerals do not slide or slide with the talc under the influence of the talc. When the proportion of fine particles in the material is high, the inclination angle takes a larger value of 30°-35°; when the proportion of coarse particles in the material is high, the inclination angle takes a smaller value of 25°-30°.

[0050] In step 3), the belt speed is controlled at 0.2 m / s-1.5 m / s.

[0051] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention. It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations. In addition, the various different embodiments of the present invention can also be arbitrarily combined, as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

[0052] In order to make the purpose, technical scheme and technical effect of the present invention clearer, the technical scheme in the embodiment of the present invention is now clearly and completely described. However, the embodiments described below are only part of the embodiments of the present invention, not all of the embodiments. In combination with the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0053] Example

[0054] A friction dry separation device for fine-grained talc ore comprises a feeding hopper 1 arranged at the head of the friction dry separation device, the feeding hopper 1 is connected above a belt device 2, and the running direction of the belt device 2 is from the head to the tail of the friction dry separation device.

[0055] The belt device 2 includes a belt bracket 7, and the two sides of the belt bracket 7 are respectively connected to the belt conveyor driving wheel bracket 4 and the belt conveyor driven wheel bracket 6, the belt conveyor driving wheel bracket 4 is connected to the belt conveyor driving wheel 3, the belt conveyor driven wheel bracket 6 is connected to the belt conveyor driven wheel 5, the belt conveyor driving wheel 3 and the belt conveyor driven wheel 5 are wound with a belt 8, and the belt conveyor driving wheel 3 is connected to a belt drive motor 9. The distance between the belt conveyor driving wheel and the belt conveyor driven wheel is 3m.

[0056] The belt device 2 is supported on the sliding bracket 10, and the sliding bracket 10 is slidably connected to the slide frame 11 through a slider 26. The slide frame slide 11 is connected to the sliding bracket 10 through a reset spring. A variable speed drive device is provided between the slide frame slide 11 and the sliding bracket 10. The variable speed drive device includes a variable speed drive motor, which is connected to the slide frame slide 11. A cam is connected to the output shaft of the variable speed drive motor, and the edge of the cam is movably connected to the edge of the sliding bracket 10.

[0057] One side of the bottom of the slideway frame slide 11 is movably connected to the base 19 through a hinge shaft, and the other side is movably connected to a lifting mechanism for adjusting the inclination angle of the belt device 2, and the lifting mechanism includes a belt inclination adjustment handwheel 13, a screw 14, a worm gear mechanism 15 and a lifting screw 16. The lifting screw 16 is movably connected to the bottom of the slideway frame 11 through a pin shaft, the worm gear mechanism 15 is connected to the base 19, and the worm gear mechanism 15 is connected to the belt inclination adjustment handwheel 13. The inclination angle of the belt device 2 is adjustable within the range of 15°-40°.

[0058] A material receiving device is provided on the outside of the belt device 2 on the opposite side of the feeding hopper 1. The material receiving device includes a material receiving chute bracket 20, a bracket cross beam 21, a fixed material receiving chute 22, a butterfly sliding chute 23, a concentrate receiving tray 24, and a tailings receiving tray 25; the bottoms of both ends of the bracket cross beam 21 are connected to the material receiving chute bracket 20, the tops of both ends of the bracket cross beam 21 are connected to the fixed material receiving chute 22, the butterfly sliding chute 23 is slidably connected on the bracket cross beam 21, the butterfly sliding chute 23 includes two chutes that are connected to each other and arranged on opposite sides, the bottom surfaces of the fixed material receiving chute 22 and the butterfly sliding chute 23 are both inclined downward, and a concentrate receiving tray 24 and a tailings receiving tray 25 are respectively provided on the ground between the two sides of the butterfly sliding chute 23 and the fixed material receiving chute 22.

[0059] A sorting method of a friction dry sorting device for fine-grained talc ore: used for sorting 3-7 mm fine-grained talc ore, specifically comprising:

[0060] 1) Crushing the talc ore and screening out 3-7mm fine-grained talc ore; the content of 3-5mm particles accounts for 40%;

[0061] 2) Adjust the lifting mechanism to tilt the belt device 2; the tilt angle is 29°;

[0062] 3) Start the belt drive motor 9 and adjust the speed of the belt 8; the belt speed is controlled at 0.2m / s.

[0063] 4) Start the variable speed drive device, the variable speed drive motor 17 drives the cam 18 to rotate, the cam 18 pushes the sliding bracket 10 close to it to move, and under the joint action of the return spring 12, the sliding bracket 10 performs variable speed reciprocating motion in the slideway frame 11, thereby driving the belt device 2 to perform periodic variable speed reciprocating motion;

[0064] 5) The belt device 2 performs periodic variable speed reciprocating motion, and the belt 8 rotates at a constant speed. The two motion forms are superimposed to form a periodic variable speed linear motion. The variable speed motion form is adjusted by changing the shape of the cam 8, and the periodic variable speed frequency is adjusted by changing the speed of the variable speed drive motor 17. The periodic variable speed linear motion can generate forward acceleration;

[0065] 6) The material is discharged from the feed hopper 1 to the inclined belt 8 surface. The material particles begin to slide downward under the action of gravity and friction, and move horizontally driven by the belt 8. The talc material particles with small friction force move downward at a faster speed, and the material particles with large friction force move horizontally at a faster speed. At the same time, under the forward acceleration generated by the periodic variable speed linear motion, the material particles with a larger friction coefficient are subjected to a larger horizontal friction force and move horizontally faster. The periodic variable speed linear motion can expand the speed difference of the horizontal movement of material particles with different friction coefficients;

[0066] 7) There will be an obvious dividing zone between talc and other materials on the surface of the belt 8. Slide the butterfly sliding chute 23 below the dividing zone. The talc particles with a small friction coefficient are relatively concentrated in the middle of the belt side and discharged into the concentrate receiving tray 24; the material particles with a large friction coefficient are concentrated on the side of the belt close to the driving wheel of the belt conveyor and discharged into the tailings receiving tray 25.

[0067] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and basic spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A friction dry separation device for fine-grained talc ore, characterized in that: It includes a feeding hopper arranged at the head of the friction dry selection device, the feeding hopper is connected above the belt device, the running direction of the belt device is from the head to the tail of the friction dry selection device, the belt device is supported on a sliding bracket, the sliding bracket is slidably connected to the slide frame, the slide frame is connected to the sliding bracket through a reset spring, a variable speed drive device is provided between the slide frame and the sliding bracket, one side of the bottom of the slide frame is movably connected to the base through a hinge, and the other side is movably connected to a lifting mechanism for adjusting the inclination angle of the belt device 2, and a material receiving device is provided on the outside of the belt device on the opposite side of the feeding hopper.

2. The friction dry separation device for fine-grained talc ore according to claim 1 is characterized in that: The belt device includes a belt bracket, and the two sides of the belt bracket are respectively connected to the belt conveyor driving wheel bracket and the belt conveyor driven wheel bracket, the belt conveyor driving wheel bracket is connected to the belt conveyor driving wheel, the belt conveyor driven wheel bracket is connected to the belt conveyor driven wheel, the belt is wrapped around the belt conveyor driving wheel and the belt conveyor driven wheel, and the belt conveyor driving wheel is connected to the belt drive motor.

3. The friction dry separation device for fine-grained talc ore according to claim 2, characterized in that: The distance between the driving wheel and the driven wheel of the belt conveyor is 2-4m.

4. The friction dry separation device for fine-grained talc ore according to claim 1, characterized in that: The adjustable range of the inclination angle of the belt device is 15°-40°.

5. The friction dry separation device for fine-grained talc ore according to claim 1, characterized in that: The variable speed drive device comprises a variable speed drive motor, which is connected to the slideway frame. The output shaft of the variable speed drive motor is connected to a cam, and the edge of the cam is movably connected to the edge of the sliding bracket.

6. The friction dry separation device for fine-grained talc ore according to claim 1, characterized in that: The lifting mechanism is a screw lift.

7. The friction dry separation device for fine-grained talc ore according to claim 1, characterized in that: The material receiving device includes a material receiving chute bracket, a bracket crossbeam, a fixed material receiving chute, a butterfly sliding chute, a concentrate receiving tray, and a tailings receiving tray; the bottoms of both ends of the bracket crossbeam are connected to the material receiving chute bracket, the tops of both ends of the bracket crossbeam are connected to the fixed material receiving chute, the butterfly sliding chute is slidably connected on the bracket crossbeam, and a concentrate receiving tray and a tailings receiving tray are respectively provided on the ground below both sides of the butterfly sliding chute.

8. The separation method of the friction dry separation device for fine-grained talc ore according to claim 1, characterized in that: Used for sorting 3-7mm fine talc ore, including: 1) Crushing the talc ore and screening out 3-7mm fine talc ore; 2) Adjust the lifting mechanism to tilt the belt device; 3) Start the belt drive motor and adjust the belt speed; 4) Start the variable speed drive device, the variable speed drive motor drives the cam to rotate, the cam pushes the sliding bracket close to it to move, and under the joint action of the return spring, the sliding bracket performs variable speed reciprocating motion in the slideway frame, thereby driving the belt device to perform periodic variable speed reciprocating motion; 5) The belt device performs periodic variable speed reciprocating motion, and the belt rotates at a constant speed. The two forms of motion are superimposed to form periodic variable speed linear motion, which can generate acceleration; 6) The material is discharged from the feeding hopper onto the inclined belt surface. The material particles begin to slide downward under the action of gravity and friction, and move horizontally driven by the belt. The talc material particles with small friction force move downward at a faster speed, and the material particles with large friction force move horizontally at a faster speed. At the same time, under the acceleration generated by the periodic variable speed linear motion, the material particles with a larger friction coefficient are subjected to a larger horizontal friction force and move horizontally faster. The periodic variable speed linear motion can expand the speed difference of the horizontal movement of material particles with different friction coefficients; 7) There will be an obvious dividing zone between talc and other materials on the belt surface. Slide the butterfly sliding chute below the dividing zone. The talc particles with a small friction coefficient are relatively concentrated in the middle of the belt side and discharged into the concentrate receiving tray. The material particles with a large friction coefficient are concentrated on the side of the belt close to the driving wheel of the belt conveyor and discharged into the tailings receiving tray.

9. The separation method of the friction dry separation device for fine-grained talc ore according to claim 8, characterized in that: Step 2) The initial adjustment angle of the belt device is 30°±1° to allow the material to slide off.

10. The separation method of the friction dry separation device for fine-grained talc ore according to claim 8, characterized in that: Step 3) The belt speed is controlled at 0.2m / s-1.5m / s.

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