Multi-stage screening mechanism for mining and processing

Abstract

The invention discloses a multi-stage screening mechanism for mining and processing, and relates to the technical field of screening equipment. The multi-stage rotary screen comprises a multi-stage rotary screen body and a screen assembly. The multi-stage drum screen comprises a plurality of ore drum screens with gradually increased screen holes; the plurality of ore drum screens are respectively a first-stage drum screen, a second-stage drum screen and a third-stage drum screen; an installation frame is fixedly installed between every two adjacent ore drum screens, and the inner wall of each installation frame is provided with a screen separation circular plate used for controlling materials to pass through in an opening and closing mode. Under the action of the multi-stage drum screen and the screen component, the ore drum screen is divided into a plurality of graded drum screens, and the effect of function conversion of mutual isolation and mutual communication is achieved, so that ore materials can immediately enter the second-stage drum screen after being screened by the first-stage drum screen, the problem of disordered screening is avoided, and the screening efficiency is improved. And the circulation efficiency of materials among all stages of ore drum screens is also improved, so that the advantages of reducing invalid time and improving screening efficiency are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of screening equipment, and in particular relates to a multi-stage screening mechanism for mining and processing. Background Art

[0002] Ore refers to a mineral aggregate from which useful components can be extracted or which has certain properties that can be utilized. It can be divided into metallic minerals and non-metallic minerals. Ore grade is often used to measure the value of ore, but the composition of gangue and the amount of harmful impurities in the effective component ore also affect the value of ore; the unit content of useful components in ore is called ore grade, which is expressed in grams per ton for precious metal ores such as gold and platinum, and percentages for other ores. Among them, because ore is mined from underground, the mined ore is mixed with useless components such as soil or sand and gravel, and ore debris is inevitably produced during mining. The mining and screening process of ore is mostly a relatively slow process, and the soil in the mixture needs to be cleaned first.

[0003] Most of the traditional screening equipment adopts the screening method of drum screen or vibrating screen. This type of screening equipment has the characteristics of relatively simple structure and economical and practical; however, they all have the problem of relatively low screening efficiency. Among them, due to the need for graded screening in the mining and screening of ore, the ore of each level can be better and more effectively utilized. At the same time, the existing multi-stage drum screen puts all the materials into the same drum, and opens a plurality of sieve holes of different sizes in the drum for screening. This preliminary screening method makes it very easy for ores of different sizes to enter the screening of slightly larger ores, thus causing the disadvantage of disordered graded screening and the need for secondary screening.

[0004] In view of the above-mentioned problems of low screening efficiency and disordered screening, the present invention designs a multi-stage screening mechanism for mining and processing. Summary of the invention

[0005] The object of the present invention is to provide a multi-stage screening mechanism for mining and processing. Through the action of multi-stage drum screens and screen plates, the ore drum screen is divided into a plurality of graded drum screens, and has the effect of functional conversion of mutual isolation and mutual connection, so that the ore material can enter the secondary drum screen immediately after being screened by the primary drum screen, avoiding the problem of screening disorder, and improving the flow efficiency of materials between the ore drum screens of each level, thereby achieving the advantages of reducing invalid time and improving screening efficiency; solving the above-mentioned problems of low screening efficiency and screening disorder.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention is a multi-stage screening mechanism for mining and processing, comprising a multi-stage drum screen and a screening disc; the multi-stage drum screen comprises a plurality of ore drum screens with gradually increasing screen holes; the ore drum screen has screen columns with different spacings arranged in a uniform array; the plurality of ore drum screens are respectively a primary drum screen, a secondary drum screen, and a tertiary drum screen; a mounting frame is fixedly installed between each two adjacent ore drum screens, and the inner wall of the mounting frame is equipped with a screening disc for opening and closing to control the passage of materials; when the screening disc is opened, the ore material can flow from the bottom of the primary drum screen to the inside of the secondary drum screen, and can also flow from the bottom of the secondary drum screen to the inside of the tertiary drum screen; it is prevented that ores of different sizes easily enter the unmatched screen holes, thereby avoiding the effect of disordered graded screening.

[0008] As a preferred technical solution of the present invention, it also includes a mounting base, on which an inclined support seat is fixedly mounted; the inclined support seat is rotatably matched with a multi-stage drum screen; the function of the inclined support seat is to allow the ore material to gradually slide down from the top of the multi-stage drum screen to the bottom of the multi-stage drum screen by relying on the action of gravity, thereby completing the effect of the multi-stage screening process.

[0009] As a preferred technical solution of the present invention, a pedestal A and a pedestal B are fixedly installed on the inclined support seat respectively; the height ratio range of the pedestal A and the pedestal B is: 0.8-0.95; the top surfaces of the pedestal A and the pedestal B are both set as inclined surfaces, and both are fixedly installed with connecting seats; the center lines of the two connecting seats coincide.

[0010] As a preferred technical solution of the present invention, a driving motor is fixedly installed on the side of the connecting seat, a circular ring is fixedly installed on one end of the multi-stage drum screen, and a gear is fixedly installed on the circumferential side of the circular ring, and the output shaft of the driving motor is meshed with the gear through a gearbox; the driving motor controls the rolling speed of the multi-stage drum screen.

[0011] As a preferred technical solution of the present invention, a rotating shaft is fixedly installed on the screen circular plate, and both ends of the rotating shaft pass through and rotatably cooperate with a mounting frame; a stepper motor is fixedly installed on the outer wall of the mounting frame, and the output shaft of the stepper motor is fixedly connected to one end of the rotating shaft; the screen circular plate controls the opening and closing state between two adjacent ore drum screens by rotating in the mounting frame.

[0012] As a preferred technical solution of the present invention, a through groove is opened on the screen circular plate; the screen circular plate is equipped with a baffle opening and closing assembly at the through groove; the baffle opening and closing assembly controls the opening and closing state of the through groove on the screen circular plate, thereby controlling the opening and closing state between two adjacent ore drum screens.

[0013] As a preferred technical solution of the present invention, the baffle opening and closing assembly includes a screw motor, a baffle and a guide column; a connecting plate is fixed on the top surface of the baffle; a screw motor and a plurality of guide columns are fixedly installed on the screen circular plate, a screw is fixed on the output shaft of the screw motor, and the screw passes through and is threadedly engaged with the connecting plate; a plurality of the guide columns pass through and are slidably engaged with the baffle and the connecting plate; the baffle prevents the ore material in the ore drum screen from directly rolling down to the through groove, thereby greatly reducing the screening time, which in turn leads to insufficient screening effect, and has the advantages of increasing the screening residence time and improving the screening adequacy.

[0014] As a preferred technical solution of the present invention, the ratio of the height of the baffle to the height of the through groove is in the range of 0.5-0.9; the ratio of the distance between the baffle and the inner wall of the multi-stage drum screen to the height of the through groove is in the range of 0.1-0.3; the distance between the baffle and the inner wall of the multi-stage drum screen can avoid the space obstruction caused by the rotation of the screen circular plate on the rotating shaft.

[0015] The present invention has the following beneficial effects:

[0016] The present invention divides the ore drum screen into a plurality of graded drum screens through the functions of the multi-stage drum screen and the screen disc, and has the effect of functional conversion of mutual isolation and mutual connection, so that the ore material can enter the secondary drum screen immediately after being screened by the primary drum screen, avoiding the problem of screening disorder and improving the flow efficiency of materials between the ore drum screens of each level, thereby achieving the advantages of reducing invalid time and improving screening efficiency.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a multi-stage screening mechanism for mining and processing of the present invention in a front view;

[0020] Figure 2 It is a structural schematic diagram of a multi-stage screening mechanism for mining and processing of the present invention in a rear-view perspective;

[0021] Figure 3 It is a structural schematic diagram of a multi-stage drum screen;

[0022] Figure 4 It is a structural schematic diagram of the screen circular plate in a front view;

[0023] Figure 5 It is a structural schematic diagram of the screen circular plate in a rear-view perspective;

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 1-multi-stage drum screen, 2-screen circular plate, 3-installation base, 100-sieve column, 101-first-stage drum screen, 102-second-stage drum screen, 103-third-stage drum screen, 104-installation frame, 105-gear, 201-rotating shaft, 202-stepping motor, 203-through slot, 204-baffle opening and closing assembly, 205-screw motor, 206-baffle, 207-guide column, 208-connecting plate, 301-tilted support seat, 302-pedestal A, 303-pedestal B, 304-connecting seat, 305-driving motor. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1

[0028] See also Figure 1-3As shown, the present invention is a multi-stage screening mechanism for mining and processing, comprising a multi-stage drum screen 1, a screen disc 2 and a mounting base 3; the multi-stage drum screen 1 comprises three ore drum screens with gradually increasing screen holes; the ore drum screen has sieve columns 100 arranged in a uniform array with different spacings; the three ore drum screens are respectively a primary drum screen 101, a secondary drum screen 102 and a tertiary drum screen 103, that is, the spacing between two adjacent sieve columns 100 on the primary drum screen 101, the secondary drum screen 102 and the tertiary drum screen 103 gradually increases; a mounting frame 104 is fixedly installed between each two adjacent ore drum screens, and the inner wall of the mounting frame 104 is equipped with a screen disc for opening and closing to control the passage of materials Circular plate 2; an inclined support seat 301 is fixedly installed on the mounting base 3; the multi-stage drum screen 1 is rotatably matched on the inclined support seat 301; the function of the inclined support seat 301 is to allow the ore material to gradually slide down from the top of the multi-stage drum screen 1 to the bottom of the multi-stage drum screen 1 by relying on the effect of gravity, thereby completing the effect of the multi-stage screening process; when the screen circular plate 2 is opened, the ore material can flow from the bottom of the first-stage drum screen 101 to the inside of the second-stage drum screen 102, and can also flow from the bottom of the second-stage drum screen 102 to the inside of the third-stage drum screen 103; it is prevented that ores of different sizes easily enter the incompatible sieve holes, thereby avoiding the effect of disordered graded screening.

[0029] Among them Figure 2 As shown, a pedestal A302 and a pedestal B303 are fixedly mounted on the inclined support seat 301 respectively; the height ratio range of the pedestal A302 and the pedestal B303 is: 0.8-0.95; the top surfaces of the pedestals A302 and B303 are both set as inclined surfaces, and both are fixedly mounted with a connecting seat 304; the center lines of the two connecting seats 304 coincide with each other; a driving motor 305 is fixedly mounted on the side of the connecting seat 304, a circular ring is fixedly mounted on one end of the multi-stage drum screen 1, and a gear 105 is fixedly mounted on the side of the circular ring, and the output shaft of the driving motor 305 is meshed with the gear 105 through a gearbox for transmission; the driving motor 305 controls the rolling speed of the multi-stage drum screen 1.

[0030] Embodiment 2

[0031] A more preferred technical solution based on the first embodiment is as follows: Figure 1 and Figure 4 As shown, a rotating shaft 201 is fixedly mounted on the screen disc 2, and both ends of the rotating shaft 201 penetrate and rotatably cooperate with a mounting frame 104; a stepper motor 202 is fixedly mounted on the outer wall of the mounting frame 104, and the output shaft of the stepper motor 202 is fixedly connected to one end of the rotating shaft 201; the screen disc 2 controls the opening and closing states between two adjacent ore drum screens by rotating in the mounting frame 104.

[0032] Embodiment 3

[0033] A more preferred technical solution based on the second embodiment is as follows: Figure 4-5 As shown, a through slot 203 is provided on the screen circular plate 2; a baffle opening and closing assembly 204 is installed at the through slot 203 of the screen circular plate 2; the baffle opening and closing assembly 204 controls the opening and closing state of the through slot 203 on the screen circular plate 2, thereby controlling the opening and closing state between two adjacent ore drum screens; when the screen circular plate 2 is parallel to the mounting frame 104, the baffle opening and closing assembly 204 can be used to control the opening and closing of the through slot 203; at the same time, when the baffle opening and closing assembly 204 is in a closed state, the opening and closing state of the screen circular plate 2 can also be controlled by the stepper motor 202; thereby, the device has more practical needs for operation and use.

[0034] Among them Figure 4-5 As shown, the baffle opening and closing assembly 204 includes a screw motor 205, a baffle 206 and a guide column 207; a connecting plate 208 is fixed to the top surface of the baffle 206; the screw motor 205 and three guide columns 207 are fixedly installed on the screen disc 2, a screw is fixed on the output shaft of the screw motor 205, and the screw passes through and is threadedly matched with the connecting plate 208; the three guide columns 207 pass through and are slidably matched with the baffle 206 and the connecting plate 208; the baffle 206 prevents the ore material in the ore drum screen from directly rolling down to the through slot 20 3 greatly reduces the screening time, which in turn leads to insufficient screening effect, and has the advantages of increasing the screening residence time and improving the screening effect; the ratio of the height of the baffle 206 to the height of the through slot 203 is in the range of 0.5-0.9; the ratio of the distance between the baffle 206 and the inner wall of the multi-stage drum screen 1 to the height of the through slot 203 is in the range of 0.1-0.3; the distance between the baffle 206 and the inner wall of the multi-stage drum screen 1 can also avoid the space obstruction caused by the rotation of the screen disc 2 on the rotating shaft 201.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0036] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A multi-stage screening mechanism for mining and processing, characterized in that: It comprises a multi-stage drum screen (1) and a screen disc (2); The multi-stage drum screen (1) comprises a plurality of ore drum screens with gradually increasing screen holes; the ore drum screens are evenly arrayed with screen columns (100) at different intervals; the plurality of ore drum screens are respectively a primary drum screen (101), a secondary drum screen (102), and a tertiary drum screen (103); a mounting frame (104) is fixedly installed between each two adjacent ore drum screens, and the inner wall of the mounting frame (104) is equipped with a screen disc (2) for opening and closing to control the passage of materials.

2. A multi-stage screening mechanism for mining and processing according to claim 1, characterized in that: It also comprises a mounting base (3), on which an inclined support seat (301) is fixedly mounted; and a multi-stage drum screen (1) is rotatably matched with the inclined support seat (301).

3. A multi-stage screening mechanism for mining and processing according to claim 2, characterized in that: The inclined support seat (301) is respectively fixedly mounted with a seat A (302) and a seat B (303); the height ratio of the seat A (302) and the seat B (303) is in the range of 0.8-0.95; the top surfaces of the seat A (302) and the seat B (303) are both arranged as inclined surfaces, and both are fixedly mounted with a connecting seat (304); the center lines of the two connecting seats (304) coincide with each other.

4. A multi-stage screening mechanism for mining and processing according to claim 3, characterized in that: A driving motor (305) is fixedly mounted on the side of the connecting seat (304), a circular ring is fixedly mounted on one end of the multi-stage drum screen (1), and a gear (105) is fixedly mounted on the circumferential side of the circular ring, and an output shaft of the driving motor (305) is meshed with the gear (105) through a gearbox for transmission.

5. The multi-stage screening mechanism for mining and processing according to claim 1 is characterized in that: A rotating shaft (201) is fixedly mounted on the screen disc (2), and both ends of the rotating shaft (201) penetrate and rotatably engage with a mounting frame (104); a stepping motor (202) is fixedly mounted on the outer wall of the mounting frame (104), and an output shaft of the stepping motor (202) is fixedly connected to one end of the rotating shaft (201).

6. A multi-stage screening mechanism for mining and processing according to claim 1 or 5, characterized in that: The screen disc (2) is provided with a through slot (203); the screen disc (2) is equipped with a baffle opening and closing assembly (204) at the through slot (203).

7. A multi-stage screening mechanism for mining and processing according to claim 6, characterized in that: The baffle opening and closing assembly (204) comprises a screw motor (205), a baffle (206) and a guide column (207); a connecting plate (208) is fixed on the top surface of the baffle (206); a screw motor (205) and a plurality of guide columns (207) are fixedly mounted on the screen disc (2); a screw is fixed on the output shaft of the screw motor (205), and the screw passes through and is threadedly engaged with the connecting plate (208); a plurality of the guide columns (207) pass through and are slidably engaged with the baffle (206) and the connecting plate (208).

8. A multi-stage screening mechanism for mining and processing according to claim 7, characterized in that: The ratio of the height of the baffle (206) to the height of the through slot (203) is in the range of 0.5-0.9; the ratio of the distance between the baffle (206) and the inner wall of the multi-stage drum screen (1) to the height of the through slot (203) is in the range of 0.1-0.3.

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