Efficient powder selecting device for superfine slag powder

Abstract

The utility model discloses an efficient powder selecting device for slag micro powder, which comprises a powder selecting shell, a feeding pipe, an air inlet pipe, a discharging pipe and a grading wheel assembly, a powder pre-selecting assembly is arranged in the powder selecting shell below the grading wheel assembly, the powder pre-selecting assembly comprises a pre-selecting box body and a material distributing conical cap, a plurality of powder selecting holes are uniformly distributed and processed on the box wall of the pre-selecting box body, and the powder selecting holes are uniformly distributed and processed on the box wall of the pre-selecting box body. The upper portion and the lower portion of the pre-selecting box body are fixedly connected with the inner wall of the pre-selecting box body through supporting plates correspondingly, a plurality of communicating holes are formed in the supporting plates, a powder pre-selecting mechanism is arranged in the pre-selecting box body, a first coarse material outlet is obliquely formed in the bottom of the pre-selecting box body, and a fine powder discharging pipe is arranged above the powder selecting shell. And powder discharging branch pipes communicated with the grading wheel assembly are arranged on the fine powder discharging pipes respectively. The device has the advantages of being high in powder selecting efficiency and high in powder selecting precision, can sort out three kinds of superfine slag powder with different particle sizes and finenesses, and is higher in practicability and better in using effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of solid waste resource treatment and processing, and specifically relates to a slag micro-powder high-efficiency powder selection device. Background Art

[0002] Slag powder is a by-product, mainly derived from metallurgy, chemical industry, electric power and other production fields. In these industries, ironmaking, steelmaking, electrolytic aluminum and other processes are often required. These processes will produce a large amount of high-temperature molten materials, including slag, smelting slag and furnace slag. These materials are crushed into powder after cooling to form slag powder. The main components of slag powder are oxides, silicates, etc., which contain a large amount of active silicates. It has good cement properties and high strength. It is mainly added to cement or concrete. As a new admixture for high-performance concrete, it can improve the durability of concrete, resist seawater erosion, reduce hydration heat and other properties, and can reduce the amount of cement clinker in concrete. And every ton of slag powder used to replace silicate cement can reduce 0.77 tons of carbon emissions, and the comprehensive emissions are less than 10% of cement. It can be inferred that slag powder has broad market prospects in the future. At present, the process flow of slag powder production line mainly includes feeding, conveying, drying, grinding, storage and other processes. After grinding, the slag powder needs to be screened by a powder classifier and stored for slag powders of different particle sizes. In the existing technology, most of the powder classifiers used for slag powder are grading wheel type powder classifiers. When in use, the slag powder enters from the bottom of the powder classifier and is sent from the bottom of the powder classifier. The slag powder is blown to the rotating grading wheel by airflow, and the rotating grading wheel will perform powder selection on the slag powder. The slag powder with larger particle size is discharged from the coarse material outlet at the bottom of the powder classifier, and the slag powder with smaller particle size is discharged from the fine material outlet at the bottom of the powder classifier. The above powder classifier has the following shortcomings during use: a grading wheel is arranged in the powder classifier to perform powder selection on the slag powder, the powder selection range is small, the powder selection efficiency is low, and the powder selection effect of the grading wheel is poor and the powder selection accuracy is low. Therefore, it is an objective need to develop a slag micro-powder high-efficiency powder selection device with advanced structure that can improve both powder selection efficiency and powder selection accuracy. Summary of the invention

[0003] The utility model aims to provide a slag micro-powder high-efficiency powder selection device which has an advanced structure and can improve the powder selection efficiency and the powder selection accuracy.

[0004] The purpose of the utility model is achieved in this way, including a powder selection shell, a feed pipe, an air inlet pipe, a discharge pipe and a grading wheel assembly, a pre-powder selection assembly is arranged in the powder selection shell below the grading wheel assembly, the pre-powder selection assembly includes a pre-selection box and a dividing cone cap installed on the top of the pre-selection box, a plurality of powder selection holes are evenly distributed on the box wall of the pre-selection box, the upper and lower parts of the pre-selection box are respectively connected and fixed to the inner wall of the pre-selection box through support plates, a plurality of connecting holes are arranged on the support plate, a pre-powder selection mechanism is arranged inside the pre-selection box, a first coarse material outlet extending to the outside of the powder selection shell is obliquely installed at the bottom of the pre-selection box, the outlet of the feed pipe is connected with the top of the dividing cone cap, the discharge pipe is located at the bottom of the powder selection shell, the air inlet pipe is located on the powder selection shell between the two support plates, there are at least 3 groups of grading wheel assemblies, a fine powder discharge pipe is arranged above the powder selection shell, and powder discharge branch pipes connected with the grading wheel assembly are respectively arranged on the fine powder discharge pipe.

[0005] Compared with the existing technology, the advantages of this device are: first, on the basis of the original structure, a pre-powder selection component is added, and the pre-powder selection component can first perform a first-level powder selection on the ground slag micropowder, and select the slag micropowder with a relatively large particle size to improve the accuracy of slag micropowder selection; second, the structure of the grading wheel is optimized, and the grading wheel component is designed into a multi-group structure, which increases the space for grading wheel powder selection. The slag micropowder blown by the air flow is simultaneously selected by multiple grading wheel assemblies, which can effectively improve the powder selection efficiency; in summary, this device pre-screens the slag micropowder with a pre-powder selection component, and then uses multiple groups of grading wheel assemblies for air selection. It has the advantages of high powder selection efficiency and high powder selection accuracy, and one device can select three slag micropowders with different particle sizes. It is more practical, has better use effect, and is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a main schematic diagram of the utility model;

[0007] Figure 2 It is a top view schematic diagram of the utility model;

[0008] Figure 3 It is a top view schematic diagram of the support plate 71 in the present utility model;

[0009] Figure 4 It is a top view schematic diagram of the bulk material distributor 18 in the present utility model;

[0010] In the figure: 1-powder selection shell, 2-feeding pipe, 3-air inlet pipe, 4-discharging pipe, 5-pre-selection box, 6-distribution cone cap, 7-support plate, 71-connecting hole, 8-first coarse material outlet, 9-fine powder exhaust pipe, 10-powder discharge branch pipe, 11-central rotating shaft, 12-horizontal transmission shaft, 13-first motor, 14-driven bevel gear, 15-driving bevel gear, 16-stirring plate, 17-brush, 18-bulk feeder, 19-dustproof casing, 20-classifying wheel, 21-fine powder box, 22-powder selection shaft, 23-shock-absorbing top plate, 24-second motor, 25-outer gear ring, 26-transmission gear, 27-support frame. DETAILED DESCRIPTION

[0011] The present invention is further described below in conjunction with the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the teachings of the present invention belong to the protection scope of the present invention.

[0012] like Figures 1 to 4 As shown, the utility model comprises a powder selection shell 1, a feed pipe 2, an air inlet pipe 3, a discharge pipe 4 and a grading wheel assembly. A pre-selection powder assembly is arranged in the powder selection shell 1 below the grading wheel assembly. The pre-selection powder assembly comprises a pre-selection box 5 and a material dividing cone cap 6 installed on the top of the pre-selection box 5. A plurality of powder selection holes are evenly distributed on the box wall of the pre-selection box 5. The upper and lower parts of the pre-selection box 5 are respectively connected and fixed to the inner wall of the pre-selection box 5 through a support plate 7. A plurality of connecting holes 71 are arranged on the support plate 7. The interior of the pre-selection box 5 is provided with a pre-selection powder hole. The powder selection mechanism and the pre-powder selection mechanism can speed up the powder screening efficiency of the pre-powder selection box 5. The bottom of the pre-powder selection box 5 is obliquely installed with a first coarse material outlet 8 extending to the outside of the powder selection shell 1. The outlet of the feed pipe 2 is connected with the top of the dividing cone cap 6. The discharge pipe 4 is located at the bottom of the powder selection shell 1. The air inlet pipe 3 is located on the powder selection shell 1 between the two support plates 7. The grading wheel assembly is at least 3 groups. A fine powder discharge pipe 9 is arranged above the powder selection shell 1. The fine powder discharge pipe 9 is respectively provided with a powder discharge branch pipe 10 connected with the grading wheel assembly.

[0013] The powder selection process of this device is as follows: the ground slag powder enters the dividing cone cap 6 through the feed pipe 2, and after being stirred by the pre-powder selection mechanism, it is pre-screened in the pre-selection box 5. After screening, the slag powder with larger particle size will be discharged through the first coarse material outlet 8, and the slag powder with relatively fine particle size enters the powder selection shell 1 through the screening hole. At this time, air is supplied to the powder selection shell 1 through the air inlet pipe 3. Under the blowing action of the air flow, the slag powder with relatively fine particle size flows upward through the connecting hole 71 and enters around the molecular wheel assembly. The grading wheel assembly will perform powder selection on the slag powder with relatively fine particle size again. After powder selection by the grading wheel assembly, the slag powder with relatively fine particle size enters the fine powder discharge pipe 9 through the powder discharge branch pipe 10 for collection, and the slag powder with relatively fine particle size is gathered at the bottom of the powder selection shell 1 after being diverted by the dividing cone cap 6 and then discharged from the discharge pipe 4. The device pre-screens the slag powder using a pre-selection component and then uses a multi-group grading wheel component for air separation. It has the advantages of high powder selection efficiency and high powder selection accuracy. One device can separate three types of slag powders with different particle sizes and finenesses. It is more practical and has better use effect.

[0014] In order to improve the efficiency of powder selection in the pre-selection box, the pre-selection powder mechanism includes a central rotating shaft 11, a horizontal transmission shaft 12 and a first motor 13. The first motor 13 is a prior art and can be directly purchased as a finished product according to the power used. The central rotating shaft 11 is coaxially and vertically installed in the pre-selection box 5. The upper end of the central rotating shaft 11 is rotatably connected to the top of the material dividing cone cap 6. The lower end of the central rotating shaft 11 is installed with a driven bevel gear 14 after passing through the first coarse material outlet 8. The horizontal transmission shaft 12 is horizontally installed on the powder selection housing 1 below the central rotating shaft 11. One end of the horizontal transmission shaft 12 is installed with an active bevel gear 15 that meshes with the driven bevel gear 14. The first motor 13 is installed on the outside of the powder selection housing 1. The other end of the horizontal transmission shaft 12 is transmission-connected to the output shaft of the first motor 13. A plurality of stirring plates 16 are evenly distributed on the circumference of the central rotating shaft 11 located in the pre-selection box 5, and the sides of the stirring plates 16 are arranged A brush 17 is provided which contacts the inner wall of the pre-selection box 5, and a bulk material dispensing device 18 is provided on the central rotating shaft 11 located in the material dividing cone cap 6. When the pre-selection box 5 selects the slag powder, the first motor 13 drives the horizontal transmission shaft 12 and the active bevel gear 15 to rotate. During the rotation of the active bevel gear 15, the driven bevel gear 14 and the central rotating shaft 11 which are meshed with the active bevel gear 15 will be driven to rotate. During the rotation of the central rotating shaft 11, the stirring plate 16 and the brush are driven to rotate. 17 and the bulk material distributor 18 rotate synchronously, so that the slag powder entering the dividing cone cap 6 is scattered into the pre-selection box 5 after passing through the bulk material distributor 18, and the rotating stirring plate 16 and the brush 17 have a very good breaking up effect on the slag powder. When the brush 17 rotates, the slag powder with relatively fine particle size enters the powder selection shell 1 through the powder selection hole, and the coarser slag powder runs downward under the action of gravity and is discharged through the first coarse material outlet 8.

[0015] Furthermore, in order to improve the effect of breaking up the slag powder, the bulker 18 includes a plurality of long bulking blades and a plurality of short bulking blades. The plurality of long bulking blades are evenly installed on the central rotating shaft 11, and the plurality of short bulking blades are installed on the central rotating shaft 11 between two adjacent long bulking blades. The cooperation of the long bulking blades and the short bulking blades can effectively improve the effect of use.

[0016] Preferably, in order to improve the effect of pre-selecting powder, the pre-selection box 5 is a cone structure with a larger upper end and a smaller lower end, and the diameter of the screening holes on the pre-selection box 5 gradually decreases from top to bottom, which can improve the accuracy of powder selection.

[0017] In order to prevent slag powder from falling onto the driving bevel gear 15 and the driven bevel gear 14 and affecting their normal rotation, a dustproof housing 19 is provided on the outer sides of the driving bevel gear 15 and the driven bevel gear 14 .

[0018] In order to improve the efficiency of powder selection and ensure that the slag powder flows upward stably under the action of airflow, the connecting holes 71 on the support plate 7 are fan-shaped holes.

[0019] Furthermore, each classifying wheel assembly includes a fine powder classifying wheel 20 and a fine powder box 21. The fine powder classifying wheel 20 adopts the structure used in the prior art, including an upper fixed plate, a lower fixed plate and a plurality of classifying blades installed between the upper fixed plate and the lower fixed plate. The fine powder box 21 is installed at the top of the powder selection shell 1, and the powder discharge branch pipe 10 is connected to the fine powder box 21. A powder selection shaft 22 extending into the powder selection shell 1 is installed on the top of the fine powder box 21. The fine powder classifying wheel 20 is installed in the powder selection shell 1 at the bottom of the fine powder box 21 through a sealer. A shock-absorbing top plate 23 is installed on the top of the fine powder box 21. A gear transmission mechanism connected to the powder selection shaft 22 is installed on the shock-absorbing top plate 23. When in use, the gear transmission mechanism drives the multiple powder selection shafts 22 to rotate synchronously. During the synchronous rotation of the powder selection shafts 22, the fine powder classifying wheel 20 is driven to rotate synchronously. The multiple fine powder classifying wheels 20 select powder by rotation, and the range of powder selection is large, which can effectively improve the efficiency of powder selection.

[0020] Furthermore, the gear transmission mechanism includes a second motor 24, an outer ring gear 25 and a transmission gear 26. The second motor 24 is a structure used in the prior art and is directly purchased as a finished product according to the power used. The second motor 24 is installed at the center of the upper surface of the shock-absorbing top plate 23. A support frame 27 is installed on the output shaft of the second motor 24. The outer ring gear 25 is installed on the outside of the support frame 27. The transmission gear 26 is installed on the corresponding powder selection shaft 22 and meshes with the outer ring gear 25. When in use, the second motor 24 is started and the outer ring gear 25 is driven to rotate through the support frame 27. During the rotation of the outer ring gear 25, it will drive multiple transmission gears 26 to rotate, thereby driving the powder selection shaft 22 to rotate.

Claims

1. A slag micro-powder high-efficiency powder selection device, comprising a powder selection housing (1), a feed pipe (2), an air inlet pipe (3), a discharge pipe (4) and a classification wheel assembly, characterized in that: A pre-selection powder assembly is arranged in a powder selection housing (1) below the grading wheel assembly, the pre-selection powder assembly comprising a pre-selection box (5) and a material dividing cone cap (6) mounted on the top of the pre-selection box (5), a plurality of powder selection holes are evenly distributed on the box wall of the pre-selection box (5), the upper and lower parts of the pre-selection box (5) are respectively connected and fixed to the inner wall of the pre-selection box (5) through a support plate (7), the support plate (7) is provided with a plurality of connecting holes (71), a pre-selection powder mechanism is arranged inside the pre-selection box (5), and the bottom of the pre-selection box (5) is provided with a plurality of connecting holes (71). The first coarse material outlet (8) is obliquely installed on the part and extends to the outside of the powder selection shell (1); the outlet of the feed pipe (2) is connected to the top of the material distribution cone cap (6); the discharge pipe (4) is located at the bottom of the powder selection shell (1); the air inlet pipe (3) is located on the powder selection shell (1) between the two support plates (7); the classification wheel assembly is at least 3 groups; a fine powder discharge pipe (9) is arranged above the powder selection shell (1); and the fine powder discharge pipe (9) is respectively provided with a powder discharge branch pipe (10) connected to the classification wheel assembly; the pre-powder selection mechanism includes A central rotating shaft (11), a horizontal transmission shaft (12) and a first motor (13), wherein the central rotating shaft (11) is coaxially and vertically installed in a pre-selection box (5), the upper end of the central rotating shaft (11) is rotatably connected to the top of a material distribution cone cap (6), the lower end of the central rotating shaft (11) is installed with a driven bevel gear (14) after passing through a first coarse material outlet (8), the horizontal transmission shaft (12) is horizontally installed on a powder selection housing (1) below the central rotating shaft (11), and one end of the horizontal transmission shaft (12) is installed with a driven bevel gear ( 14) mutually meshing active bevel gears (15), the first motor (13) is installed on the outside of the powder selection housing (1), the other end of the horizontal transmission shaft (12) is drivingly connected to the output shaft of the first motor (13), and a plurality of stirring plates (16) are evenly distributed on the circumference of the central rotating shaft (11) located in the pre-selection box (5), and the side of the stirring plate (16) is equipped with bristles (17) that contact the inner wall of the pre-selection box (5), and a bulk material distributor (18) is installed on the central rotating shaft (11) located in the material distribution cone cap (6).

2. A slag micro powder efficient powder selection device according to claim 1, characterized in that: The bulk material distributor (18) comprises a plurality of long bulk material blades and a plurality of short bulk material blades. The plurality of long bulk material blades are evenly mounted on the central rotating shaft (11), and the plurality of short bulk material blades are mounted on the central rotating shaft (11) between two adjacent long bulk material blades.

3. The slag micro powder efficient powder selection device according to claim 1 is characterized by: The preselection box (5) is a cone structure with a larger upper end and a smaller lower end.

4. The slag micro powder efficient powder selection device according to claim 1, characterized in that: The diameter of the screening holes on the pre-selection box (5) gradually decreases from top to bottom.

5. The slag micro powder efficient powder selection device according to claim 1, characterized in that: A dustproof housing (19) is provided on the outer sides of the driving bevel gear (15) and the driven bevel gear (14).

6. The slag micro powder efficient powder selection device according to claim 1, characterized in that: The communicating hole (71) on the supporting plate (7) is a fan-shaped hole.

7. The slag powder high-efficiency powder selection device according to claim 1, characterized in that: Each classifying wheel assembly comprises a fine powder classifying wheel (20) and a fine powder box (21); the fine powder box (21) is mounted on the top of a powder selection housing (1); the powder discharge branch pipe (10) is connected to the fine powder box (21); a powder selection shaft (22) extending into the powder selection housing (1) is mounted on the top of the fine powder box (21); the fine powder classifying wheel (20) is mounted in the powder selection housing (1) at the bottom of the fine powder box (21) through a sealer; a shock-absorbing top plate (23) is mounted on the top of the fine powder box (21); and a gear transmission mechanism drivingly connected to the powder selection shaft (22) is mounted on the shock-absorbing top plate (23).

8. The slag micro powder efficient powder selection device according to claim 7, characterized in that: The gear transmission mechanism comprises a second motor (24), an outer gear ring (25) and a transmission gear (26); the second motor (24) is mounted at the center of the upper surface of the shock-absorbing top plate (23); a support frame (27) is mounted on the output shaft of the second motor (24); the outer gear ring (25) is mounted on the outer side of the support frame (27); and the transmission gear (26) is mounted on the corresponding powder selection shaft (22) and meshes with the outer gear ring (25).

Images