Efficient powder concentrator of cement grinding mill roller press

Abstract

The invention discloses a cement mill roller press efficient powder selecting machine which comprises a powder selecting box, a multi-layer rotary powder selecting mechanism, a feeding mechanism and a returned material grinding mechanism, a filtering rotary drum is obliquely and rotatably arranged in the powder selecting box, an annular guide groove is fixedly formed in one side in the powder selecting box, guide sliding blocks are symmetrically and fixedly arranged on one side of the filtering rotary drum, and the guide sliding blocks and the annular guide groove slide in a matched mode. A first motor is fixedly arranged in the middle of the other side outside the powder selecting box, filter screens are fixedly arranged in the filter drum in a multi-layer mode, a powder discharging mechanism is arranged on the other side of the filter drum, a feeding mechanism is fixedly arranged above one side of the powder selecting box, and a returned material grinding mechanism is fixedly arranged on the other side of the powder selecting box; the filter screen is fixed in the filter drum in a multi-layer surrounding mode, and fine powder and coarse powder are further sorted according to the particle size while cement powder is screened out through layer-by-layer dense meshes of the filter screen; and a third motor drives a spiral auger to rotate to drive coarse materials to be fed into the grinding box again for grinding and then recycled, and automatic circulating treatment is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of powder classifiers, in particular to a high-efficiency powder classifier for a cement grinding roller press. Background Art

[0002] Cement mill roller press powder selection is an important part of cement production process, which aims to improve cement grinding efficiency, improve cement quality and reduce energy consumption. The squeezing effect of roller press on materials reduces the wear of grinding body and lining plate in cement mill. At the same time, the efficient powder selection of powder selector avoids over-grinding, reduces the loss of equipment caused by excessive grinding, prolongs the service life of cement mill and related equipment, and reduces equipment maintenance cost and downtime. Cement mill roller press powder selection technology has been widely used in cement industry at home and abroad. Whether it is a new cement production line or the transformation of traditional cement grinding system, this technology has shown significant advantages;

[0003] The invention patent with application number 202311451131.7 discloses a high-efficiency powder selection machine for cement mill roller press, which selects cement through a rotating filter cylinder, selects cement that meets the requirements, and discharges it through a discharge assembly, while coarse powder that does not meet the requirements moves along the filter cylinder until it is discharged from the guide port, which is convenient for recycling and avoids long-term accumulation in the filter cylinder to block the filter holes of the filter cylinder, so that the filter cylinder can continuously filter and select powder, thereby improving efficiency. Cement is selected through the filter cylinder, and as fine powder is gradually filtered out, a large amount of coarse powder is present at one end near the guide port. The filter cylinder is driven to rotate through the connection mechanism and the driving mechanism. During rotation, the coarse powders are prone to collision with each other and between the coarse powders and the inner wall of the filter cylinder, thereby crushing part of the coarse powders into fine powders that meet the requirements.

[0004] However, the high-efficiency powder classifier of the cement mill roller press can only screen out qualified fine powder and unqualified coarse powder according to the mesh size of the filter cylinder, and cannot further screen the fine powder. The unqualified coarse powder in the high-efficiency powder classifier of the cement mill roller press moves along the filter cylinder and is discharged from the material guide port. It needs to be manually collected and re-grinded before being poured into the powder selection device again, which requires continuous manual assistance and cannot realize automatic circulation processing of the coarse powder. Therefore, the present invention proposes a high-efficiency powder classifier for a cement mill roller press to solve the problems existing in the prior art. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to propose a high-efficiency powder classifier for a cement mill roller press. The high-efficiency powder classifier for a cement mill roller press has multiple layers of surrounding fixed filter screens in the filter drum, and utilizes the mesh holes of the filter screens to separate fine powder and coarse powder from cement powder, while further classifying the fine powder according to the particle size. The coarse material is fed back into the grinding box for grinding and recycled again by a third motor to realize automatic circulation processing.

[0006] To achieve the purpose of the present invention, the present invention is implemented through the following technical scheme: a high-efficiency powder classifier for a cement grinding roller press, comprising a powder classifier box, a multi-layer rotating powder classifier mechanism, a feeding mechanism and a return material grinding mechanism, the multi-layer rotating powder classifier mechanism comprising a filter drum, an annular guide groove, a guide slider, a first motor, a filter screen and a powder discharge mechanism, a filter drum is provided in the powder classifier box for tilting and rotating, an annular guide groove is fixedly provided on one side of the powder classifier box, a guide slider is symmetrically fixedly provided on one side of the filter drum, the guide slider slides in cooperation with the annular guide groove, a first motor is fixedly provided in the middle of the other side outside the powder classifier box, the output end of the first motor is drivingly connected to the filter drum, filters are fixedly provided in multiple layers in the filter drum, a powder discharge mechanism is provided on the other side of the filter drum, a feeding mechanism is fixedly provided on the upper side of one side of the powder classifier box, and a return material grinding mechanism is fixedly provided on the other side of the powder classifier box.

[0007] Further improvements are: the density of the filter increases from the inside to the outside, the powder discharge mechanism includes a sealing plate, a powder outlet and a sorting powder outlet pipe, a sealing plate is fixedly provided on the other side of the powder selection box, the sealing plate is sealed with the other side of the filter drum, a powder outlet is arranged on the other side of the filter drum, and a sorting powder outlet pipe is arranged and connected at the bottom of the other side of the powder selection box, the sorting powder outlet pipe corresponds to the position of the powder outlet, and the upper group of the sorting powder outlet pipes is connected to the return material grinding mechanism.

[0008] Further improvement is that: the feeding mechanism includes a first fixed frame, a feeding pipe, a sealing ring and a feeding hopper, the first fixed frame is fixedly provided on one side of the powder selection box, the feeding pipe is fixedly provided on the first fixed frame, the lower end of the feeding pipe is connected with one side of the powder selection box, the lower end of the feeding pipe is fixed with a sealing ring, the sealing ring is fitted with one side of the powder selection box and the bearing inside the sealing ring rotates in cooperation, and the upper end of the feeding pipe is connected with a feeding hopper.

[0009] Further improvements are: the return material grinding mechanism includes a second fixed frame, a return material pipe, a second motor, a spiral auger and a grinding mechanism, a second fixed frame is fixedly provided on the other side of the powder selection box, a return material pipe is fixedly provided on the second fixed frame, a second motor is fixedly provided on the upper end of the return material pipe, a spiral auger is rotatably provided in the return material pipe, and a grinding mechanism is fixedly provided in the middle of the powder selection box.

[0010] A further improvement is that the output end of the second motor is connected to the screw auger drive, and the return pipe is connected to a group of powder separation pipes above.

[0011] Further improvements are: the grinding mechanism includes a grinding box, a third motor, a grinding roller and a grinding block, a grinding box is fixedly provided in the middle of the powder selection box, a third motor is fixedly provided in the middle of the other side of the grinding box, a grinding roller is rotatably provided in the grinding box, the output end of the third motor is drivingly connected to the grinding roller, grinding blocks are symmetrically fixed in the upper and lower parts of the grinding box, the grinding blocks are close to the grinding roller, and one side of the grinding box is connected to the feed pipe.

[0012] A further improvement is that a powder discharge pipe is connected to the middle of the bottom of the powder selection box, and a first opening and closing valve is fixedly provided on the powder discharge pipe.

[0013] A further improvement is that a second opening and closing valve is fixedly provided at the lower end of the powder separation pipe.

[0014] The beneficial effects of the present invention are as follows: the present invention uses multiple layers of fixed filter screens in the filter drum, and utilizes the mesh holes of the filter screens to separate fine powder and coarse powder from cement powder, while further sorting the fine powder according to the particle size; the third motor drives the spiral auger to rotate and drives the coarse material to be re-sent into the grinding box for grinding and recycling again, thereby realizing automatic circulation processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall front cross-sectional view of the present invention;

[0016] Figure 2 A side view of the filter drum of the present invention;

[0017] Figure 3 It is an enlarged schematic diagram of point A of the present invention.

[0018] Wherein: 1. powder selection box; 2. filter drum; 3. annular guide groove; 4. guide slide block; 5. first motor; 6. filter screen; 7. sealing plate; 8. powder outlet; 9. powder sorting pipe; 10. first fixed frame; 11. feed pipe; 12. sealing ring; 13. feed hopper; 14. second fixed frame; 15. return pipe; 16. second motor; 17. spiral auger; 18. powder grinding box; 19. third motor; 20. powder grinding roller; 21. powder grinding block; 22. powder discharge pipe; 23. first opening and closing valve; 24. second opening and closing valve. DETAILED DESCRIPTION

[0019] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0020] The powder classifier can classify the materials ground from cement in time, select the fine powder that meets the particle size requirements as the finished product, avoid over-grinding, make the cement mill work more efficiently, and improve the production efficiency of the entire grinding system. Through precise classification, the powder classifier can effectively control the particle size distribution of the finished cement product, make the cement particles more uniform, increase the content of particles in the 3-30μm particle size range that is beneficial to the quality of cement, improve the strength, fluidity and other performance indicators of cement, and improve the overall quality of cement.

[0021] Based on this, according to Figure 1 , Figure 2 , Figure 3 As shown, this embodiment provides a high-efficiency powder selection machine for cement grinding roller press, including a powder selection box 1, a multi-layer rotating powder selection mechanism, a feeding mechanism and a return grinding mechanism, the multi-layer rotating powder selection mechanism includes a filter drum 2, an annular guide groove 3, a guide slider 4, a first motor 5, a filter screen 6 and a powder discharge mechanism, the filter drum 2 is tilted and rotated in the powder selection box 1, an annular guide groove 3 is fixedly provided on one side of the powder selection box 1, a guide slider 4 is symmetrically fixed on one side of the filter drum 2, the guide slider 4 slides in cooperation with the annular guide groove 3, a first motor 5 is fixedly provided in the middle of the other side of the powder selection box 1, and the first motor 5 The output end is drivingly connected to the filter drum 2, and multiple layers of filter screens 6 are fixedly arranged inside the filter drum 2. When powder selection is performed, the filter drum 2 is driven to rotate by the first motor 5 to utilize the filter screen 6 to utilize multiple layers of filter screens 6 with different densities to select cement powder of different particle sizes under the action of centrifugal force, so as to facilitate grading and screening of qualified fine powder while sorting out unqualified coarse powder, and effectively solves the problem that the fine powder cannot be further classified and screened. A powder discharge mechanism is provided on the other side of the filter drum 2, a feeding mechanism is fixedly arranged on the upper side of one side of the powder selection box 1, and a return material grinding mechanism is fixedly arranged on the other side of the powder selection box 1.

[0022] The density of the filter screen 6 increases from the inside to the outside, and the powder discharge mechanism includes a sealing plate 7, a powder outlet 8 and a powder sorting pipe 9. A sealing plate 7 is fixedly provided on the other side of the powder selection box 1, and the sealing plate 7 is sealed with the other side of the filter drum 2. A powder outlet 8 is arranged on the other side of the filter drum 2, and a powder sorting pipe 9 is arranged and connected at the bottom of the other side of the powder selection box 1. The powder sorting pipe 9 corresponds to the position of the powder outlet 8. A group of powder sorting pipes 9 on the top is connected to the return grinding mechanism, and multiple groups of powder outlets 8 correspond to the powder sorting pipes 9, so that fine powders of different particle sizes can be diverted and discharged, and the receiving and processing are convenient.

[0023] The feeding mechanism includes a first fixed frame 10, a feeding pipe 11, a sealing ring 12 and a feeding hopper 13. The first fixed frame 10 is fixedly provided on one side of the powder selection box 1, and the feeding pipe 11 is fixedly provided on the first fixed frame 10. The lower end of the feeding pipe 11 is connected with one side of the powder selection box 1, and a sealing ring 12 is fixedly provided at the lower end of the feeding pipe 11. The sealing ring 12 fits with one side of the powder selection box 1 and the inner bearing of the sealing ring 12 cooperates for rotation. The upper end of the feeding pipe 11 is connected with a feeding hopper 13. When feeding, the cement powder is poured into the middle of the filter drum 2 through the feeding hopper 13 and the feeding pipe 11, so that the feeding can be carried out while the filter drum 2 rotates.

[0024] The return material grinding mechanism includes a second fixed frame 14, a return material pipe 15, a second motor 16, a spiral auger 17 and a grinding mechanism. A second fixed frame 14 is fixedly provided on the other side of the powder selection box 1, and a return material pipe 15 is fixedly provided on the second fixed frame 14. A second motor 16 is fixedly provided on the upper end of the return material pipe 15. A spiral auger 17 is rotatably provided in the return material pipe 15. A grinding mechanism is fixedly provided in the middle of the powder selection box 1. The output end of the second motor 16 is drivingly connected to the spiral auger 17. The return material pipe 15 is connected to a group of powder separation pipes 9 above. The coarse powder is sieved out in the middle by rotating the filter drum 2. The coarse powder slides into the bottom of the return material pipe 15 as the filter drum 2 rotates. The second motor 16 drives the spiral auger 17 to rotate, driving the coarse powder to rise and then slide into the grinding box 18 through the pipeline for re-grinding.

[0025] The grinding mechanism includes a grinding box 18, a third motor 19, a grinding roller 20 and a grinding block 21. The grinding box 18 is fixedly provided in the middle of the powder selection box 1, and the third motor 19 is fixedly provided in the middle of the other side of the grinding box 18. A grinding roller 20 is rotatably provided in the grinding box 18, and the output end of the third motor 19 is drivingly connected to the grinding roller 20. Grinding blocks 21 are fixedly provided symmetrically up and down in the grinding box 18, and the grinding blocks 21 are close to the grinding roller 20. One side of the grinding box 18 is connected to the feed pipe 11. When grinding coarse powder, the third motor 19 drives the grinding roller 20 to rotate and cooperate with the grinding block 21 to perform secondary grinding to reduce the particle size of the coarse powder, and then slides into the feed pipe 11 through the pipeline for powder selection again, thereby realizing automatic circulation processing and reducing the need for manual assistance.

[0026] A powder discharge pipe 22 is connected to the middle of the bottom of the powder selection box 1 , and a first opening and closing valve 23 is fixedly provided on the powder discharge pipe 22 . When it is necessary to clean cement dust, the first opening and closing valve 23 is opened to discharge the dust from the powder discharge pipe 22 .

[0027] A second opening and closing valve 24 is fixedly provided at the lower end of the powder sorting pipe 9. When powder needs to be discharged, the second opening and closing valve 24 below the powder sorting pipe 9 is opened to facilitate discharge.

[0028] When the cement grinding roller press high-efficiency powder selecting machine selects powder, the material is poured into the filter drum through the feed hopper and the feed pipe, and the filter drum is driven by the first motor to rotate. The coarse powder and fine powder of different particle sizes are selected by using multiple layers of filter screens with different densities under the driving of centrifugal force. After the coarse powder enters the return pipe through the upper end separation powder pipe, the second motor drives the spiral auger to rotate and lift the material into the grinding box. The third motor drives the grinding roller to rotate and cooperate with the grinding block to grind the coarse powder again, and then it is circulated through the pipeline and sent to the feed pipe for powder selection again. When different fine powders are needed, the corresponding second opening and closing valve is opened to discharge the fine powder through the corresponding separation powder pipe. When the excess floating powder needs to be cleaned, the first opening and closing valve is opened to discharge it from the powder discharge pipe.

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Cement mill roller press high efficiency powder separator, characterized by: The invention comprises a powder selection box (1), a multi-layer rotating powder selection mechanism, a feeding mechanism and a return material grinding mechanism. The multi-layer rotating powder selection mechanism comprises a filter drum (2), an annular guide groove (3), a guide slider (4), a first motor (5), a filter screen (6) and a powder discharge mechanism. A filter drum (2) is provided in the powder selection box (1) so as to be tilted and rotated. An annular guide groove (3) is fixedly provided on one side of the powder selection box (1). A guide slider (4) is symmetrically fixedly provided on one side of the filter drum (2). The guide slider (4) slides in cooperation with the annular guide groove (3). A first motor (5) is fixedly provided in the middle of the other side outside the powder selection box (1). The output end of the first motor (5) is drivingly connected to the filter drum (2). A filter screen (6) is fixedly provided in multiple layers inside the filter drum (2). A powder discharge mechanism is provided on the other side of the filter drum (2). A feeding mechanism is fixedly provided on the upper side of one side of the powder selection box (1). A return material grinding mechanism is fixedly provided on the other side of the powder selection box (1).

2. The cement mill roller press high-efficiency powder separator according to claim 1, characterized in that: The density of the filter screen (6) increases from the inside to the outside. The powder discharge mechanism comprises a sealing plate (7), a powder discharge port (8) and a powder separation pipe (9). A sealing plate (7) is fixedly provided on the other side of the powder selection box (1). The sealing plate (7) is sealed with the other side of the filter drum (2). A powder discharge port (8) is arranged on the other side of the filter drum (2). A powder separation pipe (9) is arranged and connected to the lower side of the other side of the powder selection box (1). The powder separation pipe (9) corresponds to the position of the powder discharge port (8). A group of powder separation pipes (9) on the upper side is connected to the return material grinding mechanism.

3. The cement mill roller press high-efficiency powder separator according to claim 1, characterized in that: The feeding mechanism comprises a first fixed frame (10), a feeding pipe (11), a sealing ring (12) and a feeding hopper (13); the first fixed frame (10) is fixedly provided on one side of the powder selection box (1); the feeding pipe (11) is fixedly provided on the first fixed frame (10); the lower end of the feeding pipe (11) is connected to one side of the powder selection box (1); the lower end of the feeding pipe (11) is fixedly provided with a sealing ring (12); the sealing ring (12) is fitted to one side of the powder selection box (1) and the inner bearing of the sealing ring (12) rotates in cooperation; the upper end of the feeding pipe (11) is connected to the feeding hopper (13).

4. The cement mill roller press high-efficiency powder separator according to claim 2, characterized in that: The return material grinding mechanism comprises a second fixed frame (14), a return material pipe (15), a second motor (16), a spiral auger (17) and a grinding mechanism. The second fixed frame (14) is fixedly provided above the other side of the powder selection box (1), the return material pipe (15) is fixedly provided on the second fixed frame (14), the second motor (16) is fixedly provided on the upper end of the return material pipe (15), a spiral auger (17) is rotatably provided in the return material pipe (15), and the grinding mechanism is fixedly provided in the middle of the powder selection box (1).

5. The high-efficiency powder separator for cement mill roller press according to claim 4, characterized in that: The output end of the second motor (16) is drivingly connected to a spiral auger (17), and the return pipe (15) is connected to a group of powder separation pipes (9) above.

6. The cement mill roller press high-efficiency powder separator according to claim 4, characterized in that: The grinding mechanism comprises a grinding box (18), a third motor (19), a grinding roller (20) and a grinding block (21); the grinding box (18) is fixedly provided in the middle of the powder selection box (1); the third motor (19) is fixedly provided in the middle of the other side of the grinding box (18); a grinding roller (20) is rotatably provided in the grinding box (18); the output end of the third motor (19) is drivingly connected to the grinding roller (20); a grinding block (21) is fixedly provided in the grinding box (18) symmetrically in the upper and lower parts; the grinding block (21) is close to the grinding roller (20); and one side of the grinding box (18) is connected to a feed pipe (11).

7. The cement mill roller press high-efficiency powder separator according to claim 1, characterized in that: A powder discharge pipe (22) is provided in the middle of the bottom of the powder selection box (1), and a first opening and closing valve (23) is fixedly provided on the powder discharge pipe (22).

8. The high-efficiency powder separator for cement mill roller press according to claim 2, characterized in that: A second opening and closing valve (24) is fixedly provided at the lower end of the powder separation pipe (9).

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