Air flow grading device for calcium carbonate powder
By designing an airflow classification device for calcium carbonate powder, and utilizing components such as a powder feeding inclined tube, a cyclone separator, and a crushing roller, the problem of insufficient classification accuracy caused by calcium carbonate powder agglomeration was solved, achieving effective classification of coarse and fine materials and improving product quality.
Patent Information
- Application Number
- CN202423145638.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-19
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-19
AI Technical Summary
Calcium carbonate powder is prone to agglomeration during air classification, which leads to a decrease in classification accuracy and affects product quality.
An airflow classification device for calcium carbonate powder was designed, including components such as a powder feeding inclined tube, a cyclone separator, a classification bin, a crushing roller, and a screw conveyor. Through steps such as powder conveying by a fan, cyclone separation, crushing roller crushing, and fine material return, effective classification of coarse and fine materials is achieved.
This effectively prevents calcium carbonate powder from agglomerating, improves grading accuracy, and ensures product quality.
Smart Images
Figure CN223628781U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to calcium carbonate production technical field, specifically is a calcium carbonate powder's airflow grading device. BACKGROUND
[0002] With the development of modern industry, the quality requirement of calcium carbonate powder is increasingly improved, especially in the particle size distribution. As an important powder processing technology, airflow classification is widely used in the classification treatment of various minerals and chemical raw materials. However, in the actual application process, the fine calcium carbonate particles are easy to agglomerate under the action of airflow, which leads to the decrease of classification precision and affects the product quality. SUMMARY
[0003] The utility model wants to solve the technical problem to provide a calcium carbonate powder's airflow grading device, can effectively solve the problem of insufficient classification precision caused by calcium carbonate powder agglomeration, realizes the effective classification treatment of coarse and fine materials, improves the quality of product.
[0004] To solve the above technical problem, the technical scheme adopted by the utility model is: a calcium carbonate powder's airflow grading device, including powder feeding inclined pipe, the lower end of powder feeding inclined pipe is connected with fan, the higher end of powder feeding inclined pipe is connected with cyclone separator, the bottom of cyclone separator is connected with the top of grading bin, the grading bin is provided with a baffle, the baffle forms fine material cavity and coarse material cavity on both sides respectively, the sidewall on one side of coarse material cavity is equipped with blowpipe, the blow direction of blowpipe is from coarse material cavity to fine material cavity, the coarse material outlet pipe at the bottom of coarse material cavity is connected with the feed inlet of screw lifting machine, the screw lifting machine is arranged obliquely, the powder feeding inclined pipe is equipped with return pipe, and the discharge port of screw lifting machine is connected with return pipe.
[0005] In the preferred scheme, the lower end of the powder feeding inclined pipe is connected with a horizontal pipe section, an inlet hopper is arranged above the horizontal pipe section, a slag discharge pipe is arranged below the horizontal pipe section, a flashboard valve is arranged on the slag discharge pipe, and a mesh baffle is arranged inside the pipe section between the slag discharge pipe and the fan.
[0006] In the preferred scheme, the cyclone separator is arranged on the top of a support, the discharge pipe at the bottom of the cyclone separator passes through the top surface of the support, and the grading bin is fixed below the support.
[0007] In the preferred scheme, two crushing rollers are arranged in the coarse material cavity, and the two crushing rollers are arranged at the same horizontal height and are tangent to each other.
[0008] Two guide inclined plates are arranged on the top of the coarse material cavity, and the two guide inclined plates are used for guiding the powder to the center of the coarse material cavity and falling between the two crushing rollers.
[0009] In the preferred solution, a scraping plate is arranged below the crushing roller, horizontally and fixed on the inner wall of the two sides of the coarse material cavity, and one side of the scraping plate is tangent to the crushing roller.
[0010] In the preferred solution, the fine material cavity is provided with a fine material outlet pipe at the bottom.
[0011] In the preferred solution, a baffle is arranged at the connecting position of the return pipe and the powder feeding inclined pipe, and the upper part of the baffle is connected between the inner wall of the powder feeding inclined pipe through a hinge.
[0012] The airflow classification device for calcium carbonate powder has the following beneficial effects by adopting the above structure:
[0013] (1) When the fan is in the blowing state, the powder feeding inclined pipe can be used for conveying materials, and after the material conveying is completed, the fan can be adjusted to the exhaust state to realize the recovery of impurities in the powder feeding inclined pipe;
[0014] (2) The classification bin can realize the classification of coarse and fine powders by horizontally feeding air, and the cyclone separator can be combined to separate the fine material and the superfine material;
[0015] (3) The coarse material part is crushed by the crushing roller and then flows back to the powder feeding inclined pipe, which can perform secondary classification on the agglomerated material to avoid the decrease of classification accuracy caused by the agglomeration of calcium carbonate powder;
[0016] (4) During the powder feeding process of the powder feeding inclined pipe, the baffle will not be opened, and when the returned powder in the return pipe reaches a certain amount, the gravity of the accumulated powder can automatically open the baffle, so that the fine material part formed after the crushing of the coarse material can participate in the classification again. BRIEF DESCRIPTION OF DRAWINGS
[0017] The utility model will be further described in connection with the drawings and examples:
[0018] Figure 1 It is the whole structure schematic diagram of the utility model.
[0019] Figure 2 It is the structure schematic diagram of the powder feeding inclined pipe feeding end structure of the utility model.
[0020] Figure 3 It is the structure schematic diagram of the return pipe and the powder feeding inclined pipe connecting position of the utility model.
[0021] Figure 4 It is the structure schematic diagram of the baffle opening at the return pipe and the powder feeding inclined pipe connecting position of the utility model.
[0022] In the diagram: 1. Powder feeding inclined pipe; 2. Fan; 3. Cyclone separator; 4. Grading bin; 5. Screw conveyor; 6. Feed hopper; 7. Slag discharge pipe; 8. Slide valve; 9. Mesh partition; 10. Support; 11. Feed pipe; 12. Air blowing pipe; 13. Baffle; 14. Coarse material chamber; 15. Fine material chamber; 16. Crushing roller; 17. Scraper; 18. Guide inclined plate; 19. Fine material outlet pipe; 20. Coarse material outlet pipe; 21. Return pipe; 22. Baffle; 23. Hinge. Detailed Implementation
[0023] like Figures 1-4 In this invention, an airflow classification device for calcium carbonate powder includes a powder feeding inclined tube 1. The lower end of the powder feeding inclined tube 1 is connected to a blower 2, and the higher end of the powder feeding inclined tube 1 is connected to a cyclone separator 3. The discharge pipe 11 at the bottom of the cyclone separator 3 is connected to the top of a classification chamber 4. A partition 13 is provided inside the classification chamber 4, and a fine material chamber 14 and a coarse material chamber 15 are formed on both sides of the partition 13, respectively. A blowing pipe 12 is provided on the side wall of one side of the coarse material chamber 14, and the blowing direction of the blowing pipe 12 is from the coarse material chamber 14 to the fine material chamber 15. The coarse material outlet pipe 20 at the bottom of the coarse material chamber 14 is connected to the inlet of a screw conveyor 5. The screw conveyor 5 is inclined, and a return pipe 21 is provided on the powder feeding inclined tube 1. The outlet of the screw conveyor 5 is connected to the return pipe 21.
[0024] In a preferred embodiment, the lower end of the powder feeding inclined pipe 1 is connected to a horizontal pipe section, a feed hopper 6 is provided above the horizontal pipe section, a slag discharge pipe 7 is provided below the horizontal pipe section, a slide valve 8 is provided on the slag discharge pipe 7, and a mesh partition 9 is provided inside the pipe section between the slag discharge pipe 7 and the blower 2.
[0025] In a preferred embodiment, the cyclone separator 3 is disposed on the top of the support 10, the discharge pipe 11 at the bottom of the cyclone separator 3 passes through the top surface of the support 10, and the grading bin 4 is fixed below the support 10.
[0026] In a preferred embodiment, the coarse material chamber 14 is provided with two crushing rollers 16, which are arranged at the same horizontal height and tangentially.
[0027] The top of the coarse material chamber 14 is provided with two guide plates 18, which are used to guide the powder to the center of the coarse material chamber 14 and fall between the two crushing rollers 16.
[0028] In a preferred embodiment, a scraper 17 is provided below the crushing roller 16. The scraper 17 is horizontal and fixed on the inner walls of both sides of the coarse material chamber 14, and one side of the scraper 17 is tangent to the crushing roller 16.
[0029] In a preferred embodiment, the bottom of the fine material chamber 15 is provided with a fine material outlet pipe 19.
[0030] In the preferred scheme, the return pipe 21 is provided with a baffle 22 at the connection position with the powder feeding inclined pipe 1, and the upper portion of the baffle 22 is connected with the inner wall of the powder feeding inclined pipe 1 through a hinge 23.
[0031] The present application discloses a kind of airflow classification devices of calcium carbonate powder, when carrying out calcium carbonate powder grading operation:
[0032] The calcium carbonate powder is added into the powder feeding inclined pipe 1 through the feeding hopper 6, the fan 2 is started to blow air, and the fan delivers the powder into the cyclone separator 3, the heavier impurities are left in the powder feeding inclined pipe 1, the powder entering the cyclone separator 3 is preliminarily separated, the superfine material part is output, and the coarse and fine material part enters the grading bin 4 through the discharge pipe 11, the transverse air entering through the blowing pipe 12 blows the fine material part into the fine material cavity 15, and finally the fine material part is discharged through the fine material discharge pipe 19, so that the superfine material part and the fine material part are separated.
[0033] During the blowing process of the blowing pipe 12, the coarse material part falls into the coarse material cavity 14 due to its large gravity, is crushed and ground through the crushing roller 16, and the material adhered to the crushing roller 16 is scraped off through the scraper 17, the crushed and ground powder falls into the spiral material lifting machine 5, is sent into the return pipe 21 through the spiral material lifting machine 5, the baffle 22 is opened when the material accumulation amount in the return pipe 21 increases, the powder falls into the powder feeding inclined pipe 1 and circulates the above process.
[0034] After the grading operation is completed, the fan 2 is switched to the exhaust mode, the heavy impurities in the powder feeding inclined pipe 1 move towards the fan 2, the plug valve 8 is opened at this time, the heavy impurities are blocked by the net partition plate 9 and finally fall into the slag discharge pipe 7 and are discharged.
Claims
1. An air classification apparatus for calcium carbonate powder, characterized by: The device comprises a powder feeding inclined pipe (1), a lower end of the powder feeding inclined pipe (1) is connected with a fan (2), a higher end of the powder feeding inclined pipe (1) is connected with a cyclone separator (3), a lower discharge pipe (11) at the bottom of the cyclone separator (3) is connected to the top of a grading bin (4), a partition plate (13) is arranged in the grading bin (4), the partition plate (13) divides the grading bin (4) into a fine material chamber (15) and a coarse material chamber (14), a blowing pipe (12) is arranged on the side wall of the coarse material chamber (14), the blowing direction of the blowing pipe (12) is from the coarse material chamber (14) to the fine material chamber (15), a coarse material outlet pipe (20) at the bottom of the coarse material chamber (14) is connected to the inlet of a spiral material lifting machine (5), the spiral material lifting machine (5) is arranged in an inclined manner, a return pipe (21) is arranged on the powder feeding inclined pipe (1), and the outlet of the spiral material lifting machine (5) is connected to the return pipe (21).
2. An apparatus for air classification of calcium carbonate powder according to claim 1, characterized in that: A horizontal pipe section is connected to the lower end of the powder feeding inclined pipe (1), an inlet hopper (6) is arranged above the horizontal pipe section, a slag discharge pipe (7) is arranged below the horizontal pipe section, a plug valve (8) is arranged on the slag discharge pipe (7), and a mesh partition plate (9) is arranged in the pipe section between the slag discharge pipe (7) and the fan (2).
3. A device for air classification of calcium carbonate powder according to claim 1, characterized in that: The cyclone separator (3) is arranged on the top of a support (10), the lower discharge pipe (11) at the bottom of the cyclone separator (3) penetrates through the top surface of the support (10), and the grading bin (4) is fixed below the support (10).
4. A device for air classification of calcium carbonate powder according to claim 1, characterized in that: Two crushing rollers (16) are arranged in the coarse material chamber (14) and are arranged at the same horizontal height and are tangent to each other. Two material guide inclined plates (18) are arranged on the top of the coarse material chamber (14) and are used for guiding the powder to the center of the coarse material chamber (14) and falling between the two crushing rollers (16).
5. An apparatus for the air classification of calcium carbonate powder according to claim 4, characterised in that: A material scraping plate (17) is arranged below the crushing roller (16) and is horizontally fixed on the inner wall of the coarse material chamber (14), and one side of the material scraping plate (17) is tangent to the crushing roller (16).
6. An apparatus for air classification of calcium carbonate powder according to claim 1, characterized in that: A fine material outlet pipe (19) is arranged at the bottom of the fine material chamber (15).
7. A device for air classification of calcium carbonate powder according to claim 1, characterized in that: A baffle (22) is arranged at the connection position of the return pipe (21) and the powder feeding inclined pipe (1), and the upper portion of the baffle (22) is connected to the inner wall of the powder feeding inclined pipe (1) through a hinge (23).