A high-activity steel slag micro-powder preparation material conveying device and a method of using the same

Abstract

The present application relates to the technical field of steel slag micro-powder preparation, and discloses a material conveying device for preparing high-activity steel slag micro-powder and a use method thereof, which comprises a sorting mechanism, the sorting mechanism comprises a cover body, a feeding pipe is fixedly installed in the inside of the cover body, helical blades are rotatably installed in the feeding pipe, the inner cavity of the cover body is a conical cavity with a small upper end and a large lower end, a sorting sleeve is rotatably installed in the conical cavity, and a first driving motor and a second driving motor are arranged at the top end of the cover body respectively. The material conveying device has the advantages that the feeding pipe and the sorting sleeve are arranged, the helical blades rotating in the feeding pipe are used to lift the material, the airflow with different flow rates is used to discharge the materials with different particle sizes from the discharge pipes when the material falls from the discharge port, the function of sorting the materials with different particle sizes is realized while the steel slag micro-powder is conveyed, the sorting of the materials with multiple levels is completed at one time, and the production efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel slag micro-powder preparation, and particularly relates to a material conveying device for high-activity steel slag micro-powder preparation and a use method thereof. BACKGROUND

[0002] The production of steel slag micro-powder is a complex process involving multiple steps and technical details. The conveying of the material is mainly the conveying of powder. The conveying mode of using airflow to convey the material from one place to another has the advantages of high efficiency, environmental protection, energy saving, etc. In the prior art, a patent document with the publication number CN221295051U discloses a steel slag micro-powder conveying device. The device includes a main body assembly, which includes a shell. The inside of the shell is provided with a screening assembly, which includes a feeding pipe, a screening pipe, a second motor, a transmission shaft, a spiral blade, a dust cover, a collection box, and a handle. The top of the shell is fixedly connected with the feeding pipe. The bottom end of the feeding pipe is communicated with the screening pipe. Steel slag micro-powder is fed through the feeding pipe. The spiral blade is driven to rotate by the second motor. The micro-powder is screened while being conveyed. The micro-powder with qualified particle size falls on the bottom conveying belt and is conveyed to the reaction tank. The unqualified micro-powder is conveyed to the collection box, which is convenient for the workers to collect and regrind. The particle size of the conveyed steel slag micro-powder can meet the reaction requirements. The conveying environment of the steel slag micro-powder is closed by the shell to prevent the micro-powder from being polluted by impurities and to avoid environmental pollution caused by dust.

[0003] In actual production, the steel slag micro-powder is a mixture of various particles with different particle sizes. The particle size of the ultra-fine micro-powder is even about 40 mu. It is difficult to screen out the powder with different particle sizes by the simple screening pipe. The finer the powder, the more difficult the screening. The efficiency is low. Therefore, the existing material conveying device has the disadvantage that it is difficult to screen out multiple materials with different particle sizes when conveying the steel slag micro-powder. It is inconvenient to use and needs to be solved urgently. SUMMARY

[0004] The purpose of the present application is to solve the problem in the prior art that the existing material conveying device has the disadvantage that it is difficult to screen out multiple materials with different particle sizes when conveying the steel slag micro-powder. A material conveying device for high-activity steel slag micro-powder preparation and a use method thereof are provided.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a material conveying device for high-activity steel slag micro-powder preparation, which comprises a sorting mechanism. The sorting mechanism comprises a cover body. A conveying pipe is fixedly installed in the inside of the cover body. A spiral blade is rotatably installed in the conveying pipe. A feeding hopper and a first driving motor are fixedly installed at the top end of the conveying pipe. The first driving motor drives the spiral blade to rotate. An air inlet pipe and three discharge pipes are fixedly installed on the surface of the cover body.

[0006] The inner cavity of the cover body is a tapered cavity with a small upper end and a large lower end, a sorting sleeve is rotatably installed in the tapered cavity, and a second driving motor for driving the sorting sleeve to rotate is fixedly installed at the top end of the cover body.

[0007] A plurality of windows are formed in the surface of the sorting sleeve, and a plurality of partition rings are fixedly installed on the inner wall of the sorting sleeve, which divides the inner wall of the sorting sleeve into three annular regions arranged in an up-down position. The three annular regions are communicated with each discharge pipe through the windows. Different particle size materials are discharged from the discharge pipes by using airflow with different flow rates. While conveying the steel slag powder, the function of sorting out a plurality of different particle size materials is realized.

[0008] Preferably, the cover body is fixedly installed on the upper side of the grinding mechanism, and the lower end of the conveying pipe extends to the inside of the grinding mechanism. The grinding mechanism comprises a base, a hopper is fixedly installed on the upper side of the base, a rotating disc is rotatably installed in the hopper, a third driving motor is fixedly installed in the inside of the base, the third driving motor drives the rotating disc to rotate horizontally, an installation plate is rotatably installed on the base, the installation plate can extend into the hopper when it swings, a grinding roller is rotatably installed on the inner side of the installation plate, a hydraulic oil cylinder is rotatably installed on the base, and the extension end of the hydraulic oil cylinder is movably connected with the outer side of the installation plate. The combination with the grinding mechanism realizes the effects of conveying, grinding and circulating sorting.

[0009] Preferably, the bottom end of the conveying pipe extends to the upper side of the rotating disc, a feeding inlet is formed between the lower end of the conveying pipe and the upper surface of the rotating disc, a discharge port is formed in the surface of the conveying pipe, the lower plane of the spiral blade is in sliding contact with the upper surface of the rotating disc, the upper end of the spiral blade extends to the upper edge of the discharge port, and the discharge speed of the newly added material from the discharge port can be controlled during the conveying process, so that the material replenishment amount reaches a dynamic balance state.

[0010] Preferably, a gear ring is fixedly installed at the top end of the sorting sleeve, a driving gear is fixedly installed at the rotating end of the second driving motor, the driving gear is in meshing transmission with the gear ring, and a plurality of baffles are fixedly installed on the lower side of the plurality of partition rings, so that the sorting sleeve can rotate forward or reversely, in order to adjust and control the airflow flow rate in the annular region by using the baffles.

[0011] Preferably, three flow guide ports are formed in the inner wall of the tapered cavity of the cover body, the three flow guide ports are respectively communicated with each discharge pipe, the outer wall of the sorting sleeve is in sliding contact with the inner wall of the tapered cavity of the cover body, when the flow guide port coincides with the window, the inner cavity of the sorting sleeve is communicated with the discharge pipe through the flow guide port and the window, when the outer wall of the sorting sleeve coincides with the flow guide port, the communication channel between the inner cavity of the sorting sleeve and the discharge pipe is cut off, and the sorting sleeve rotates at different speeds, which not only can control the discharge speed of the discharge pipe, but also can control the airflow flow rate in the annular region.

[0012] The application further provides a use method of the material conveying device for preparing high-activity steel slag micro-powder.

[0013] S1, the material containing particles with different particle sizes is added into the feeding hopper, the material falls into the cover body from the discharge port, air is injected into the cover body through the air inlet pipe, the air forms a spiral upward airflow in the cover body, and then the airflow is discharged from the discharge pipes at different flow rates, part of the material is discharged from the discharge pipes with the airflow, and the other part of the material falls onto the rotating disc;

[0014] S2, the rotating disc is rotated by the third driving motor, the mounting plate is driven to reciprocate by the hydraulic oil cylinder, the gap between the grinding roller and the rotating disc is adjusted, the material on the rotating disc is crushed by the grinding roller rolling on the surface of the rotating disc;

[0015] S3, the first driving motor is started to rotate the spiral blade, the material on the rotating disc is lifted by the spiral blade from the lower end of the feeding pipe and enters the cover body from the discharge port, so that the material is circularly sorted;

[0016] S4, the three discharge pipes are communicated with the three bag-type pulse dust collectors through pipelines, the material is guided into the bag-type pulse dust collectors from the three discharge pipes with the airflow, and the powder with different particle sizes is collected through the three bag-type pulse dust collectors.

[0017] Preferably, in the process of S3, the first material is discharged from the discharge port from top to bottom in the feeding pipe, the second material is discharged from the discharge port from bottom to top in the feeding pipe, the first material and the second material meet in the discharge port area, when the discharge amount of the second material from the discharge port decreases, the discharge amount of the first material from the discharge port increases, and the consumption of the material in the circular sorting process is supplemented.

[0018] Preferably, in the process of S4, the second driving motor is started to control the rotating speed of the sorting sleeve, when the rotating speed of the sorting sleeve increases, the flow rate of the airflow and the material in the annular area increases, at the same time, the number of coincidences of the flow guide port and the window increases, the flow rate of the material guided into the bag-type pulse dust collectors from the discharge pipes with the airflow increases, and when the rotating speed of the sorting sleeve decreases, the flow rate of the airflow and the material in the annular area decreases, at the same time, the number of coincidences of the flow guide port and the window decreases, and the flow rate of the material guided into the bag-type pulse dust collectors from the discharge pipes with the airflow decreases.

[0019] The application has the following beneficial effects:

[0020] 1. The material conveying device proposed in this invention, by setting up a conveying pipe and a sorting sleeve, uses rotating spiral blades inside the conveying pipe to lift the material. When the material is discharged and falls from the discharge port, airflow with different flow rates is used to discharge materials of different particle sizes from each discharge pipe. While conveying steel slag powder, it can also sort out multiple different particle sizes of materials. The sorting of multiple grades of materials can be completed in one conveying operation, which greatly improves production efficiency.

[0021] 2. The material conveying device proposed in this invention can be used in combination with the grinding mechanism. The conveying pipe lifts the material on the rotating disk to a high position. Through airflow sorting, the material that meets the particle size requirements is discharged from the discharge pipe and collected separately. The material that does not meet the requirements falls back onto the rotating disk for repeated grinding. This cycle continues until the particle size of the material meets the requirements, thereby achieving the effect of cyclic sorting.

[0022] 3. The material conveying device proposed in this invention forcibly lifts the material on the rotating disc to a high position through the conveying pipe, and then discharges and sorts it. This can promptly remove the fine powder from the grinding process, preventing the fine powder from occupying the volume of the rotating disc and affecting processing efficiency. Moreover, the design of both the circulating grinding material and the newly added material falling from the discharge port, with the circulating grinding material being transported from top to bottom in the conveying pipe, can control the discharge speed of the newly added material from the discharge port, so that the material replenishment reaches a dynamic balance state, ensuring that the grinding mechanism is in a high-efficiency working state, reducing the failure rate, and improving production efficiency.

[0023] 4. The method of using the material conveying device proposed in this invention, by controlling the rotation speed of the first drive motor, allows the spiral blades to rotate at different speeds, which can not only control the material conveying speed of the circulating grinding, but also control the feeding speed of new material; by controlling the rotation of the second drive motor, the sorting sleeve can rotate at different speeds, which can not only control the discharge speed of the discharge pipe, but also control the airflow velocity in the annular area, so that the airflow velocity affecting the material falling speed is positively correlated with the discharge speed, so as to facilitate manual control and provide conditions for the automated control of steel slag powder production. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the material conveying device proposed in this invention;

[0025] Figure 2 This is a three-dimensional structural diagram of the sorting sleeve proposed in this invention;

[0026] Figure 3 This is a three-dimensional structural diagram of the grinding mechanism proposed in this invention;

[0027] Figure 4 This is a schematic cross-sectional view of the material conveying device proposed in this invention. Figure 1 ;

[0028] Figure 5 The schematic diagram of the front view of the material conveying device provided by the present application Figure 2 ;

[0029] Figure 6 The schematic diagram of the front view of the material conveying pipe provided by the present application.

[0030] In the figure: 1 cover body, 2 material conveying pipe, 3 spiral blade, 4 feeding hopper, 5 first driving motor, 6 air inlet pipe, 7 discharge pipe, 8 sorting sleeve, 9 second driving motor, 10 window, 11 partition ring, 12 annular area, 13 base, 14 stock bin, 15 rotating disc, 16 third driving motor, 17 mounting plate, 18 grinding roller, 19 hydraulic oil cylinder, 20 feeding inlet, 21 discharge outlet, 22 gear ring, 23 driving gear, 24 flow guide, 25 baffle. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0032] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0033] Reference Figures 1-6 A material conveying device for preparing high-activity steel slag micro-powder, comprising a sorting mechanism, the sorting mechanism comprising a cover body 1, a material conveying pipe 2 fixedly installed inside the cover body 1, a spiral blade 3 rotatably installed in the material conveying pipe 2, a feeding hopper 4 and a first driving motor 5 fixedly installed at the top end of the material conveying pipe 2, the first driving motor 5 driving the spiral blade 3 to rotate, and an air inlet pipe 6 and three discharge pipes 7 fixedly installed on the surface of the cover body 1.

[0034] The inner cavity of the cover body 1 is a tapered cavity with a small upper end and a large lower end, a sorting sleeve 8 is rotatably installed in the tapered cavity, and a second driving motor 9 for driving the sorting sleeve 8 to rotate is fixedly installed at the top end of the cover body 1; specifically, a gear ring 22 is fixedly installed at the top end of the sorting sleeve 8, a driving gear 23 is fixedly installed at the rotating end of the second driving motor 9, and the driving gear 23 is in meshing transmission with the gear ring 22.

[0035] As Figure 2As shown, the surface of the sorting sleeve 8 is provided with a plurality of windows 10, and the inner wall of the sorting sleeve 8 is fixedly provided with a plurality of partition rings 11, and the lower side of each of the plurality of partition rings 11 is fixedly provided with a plurality of baffles 25, and the inner wall of the sorting sleeve 8 is divided into three annular regions 12 by the partition rings 11, and the three annular regions 12 are arranged in an upper-lower position, and the three annular regions 12 are communicated with each of the discharge pipes 7 through the windows 10.

[0036] Specifically, as shown in Figure 4 , the inner wall of the conical cavity of the cover body 1 is provided with three flow guide openings 24, and the three flow guide openings 24 are respectively communicated with each of the discharge pipes 7, and the outer wall of the sorting sleeve 8 is in sliding contact with the inner wall of the conical cavity of the cover body 1, and when the flow guide opening 24 coincides with the window 10, the inner cavity of the sorting sleeve 8 is communicated with the discharge pipe 7 through the flow guide opening 24 and the window 10, and when the outer wall of the sorting sleeve 8 coincides with the flow guide opening 24, the communication channel between the inner cavity of the sorting sleeve 8 and the discharge pipe 7 is cut off.

[0037] In this embodiment, the cover body 1 is fixedly installed on the upper side of the grinding mechanism, and the lower end of the material conveying pipe 2 extends to the inside of the grinding mechanism.

[0038] As shown in Figure 3 , the grinding mechanism comprises a base 13, and the upper side of the base 13 is fixedly provided with a material bin 14, and the upper opening of the material bin 14 is communicated with and fixedly connected to the lower opening of the cover body 1, and the inside of the material bin 14 is rotatably provided with a rotating disc 15, and the inside of the base 13 is fixedly provided with a third driving motor 16, and the third driving motor 16 drives the rotating disc 15 to rotate horizontally, and the base 13 is rotatably provided with a mounting plate 17, and the mounting plate 17 can extend into the material bin 14 when it swings, and the inner side of the mounting plate 17 is rotatably provided with a grinding roller 18, and the base 13 is rotatably provided with a hydraulic oil cylinder 19, and the extension end of the hydraulic oil cylinder 19 is movably connected to the outer side of the mounting plate 17, and the material is introduced onto the upper side of the rotating disc 15, and under the action of the centrifugal force of the rotating disc 15, the material accumulates to the edge of the rotating disc 15, and the material is crushed by the rolling of the grinding roller 18.

[0039] In this embodiment, the bottom end of the material conveying pipe 2 extends to the upper side of the rotating disc 15, and the lower end of the material conveying pipe 2 and the upper surface of the rotating disc 15 form a feeding inlet 20, and the surface of the material conveying pipe 2 is provided with a discharge port 21, and the lower plane of the spiral blade 3 is in sliding contact with the upper surface of the rotating disc 15, and the upper end of the spiral blade 3 extends to the upper edge of the discharge port 21, and as shown in Figure 6 , the material falls along the surface of the spiral blade 3 in a spiral manner and can be discharged from the discharge port 21.

[0040] The application also provides a use method of the material conveying device for preparing high-activity steel slag micro-powder, which comprises the following steps:

[0041] S1, the material containing different particle size particles is added into the feeding hopper 4, the material enters the cover body 1 from the discharge port 21, falls, air is injected into the cover body 1 through the air inlet pipe 6, the air forms a spiral upward airflow in the cover body 1, and then the airflow is discharged from the discharge pipe 7 at different flow rates respectively, part of the material is discharged from the discharge pipe 7 with the airflow, and the other part of the material falls onto the rotating disc 15;

[0042] As shown in 5, the airflow is input into the cover body 1 at a speed V0, the spiral upward airflow promotes the air and the material in the cover body 1 to move along the circumferences of the annular areas 12, and then is discharged from the discharge pipes 7 at speeds V1, V2 and V3 respectively, the spiral upward airflow is blocked by the falling material, the separation ring 11 and the baffle 25, the kinetic energy gradually decreases, so V1V2V3, the material moving along the circumferences in the annular areas 12 is subjected to the action of the centrifugal force and the gravity, the material with smaller particles is discharged from the upper discharge pipe 7 at the speed V1, so that the first separation is realized; the material with medium particles is discharged from the middle discharge pipe 7 at the speed V2, so that the second separation is realized; the material with larger particles is discharged from the lower discharge pipe 7 at the speed V3, so that the third separation is realized; and the remaining material falls onto the rotating disc 15 under the action of the gravity;

[0043] S2, the third driving motor 16 drives the rotating disc 15 to rotate, the hydraulic oil cylinder 19 drives the mounting plate 17 to reciprocate, the gap between the grinding roller 18 and the rotating disc 15 is adjusted, the material on the rotating disc 15 is crushed by the grinding roller 18 rolling on the surface of the rotating disc 15;

[0044] S3, the first driving motor 5 is started, the spiral blade 3 is driven to rotate, the material on the rotating disc 15 enters the lower end of the feeding pipe 2 from the feeding inlet 20, is lifted by the spiral blade 3, enters the cover body 1 from the discharge port 21, and the first, second and third separations of the material in the process of S1 are repeated, so that the circulating separation of the material is realized;

[0045] It should be noted that the material lifted by the spiral blade 3 includes the powder with different particle sizes after being ground and processed, and the large particle material without being ground and processed;

[0046] S4, the three discharge pipes 7 are respectively connected with the three bag pulse dust collectors through pipes, the material is introduced into the bag pulse dust collectors from the three discharge pipes 7 with the airflow, the powder with different particle sizes is collected through the three bag pulse dust collectors, the bag pulse dust collector has the function of collecting the powder in the airflow, and is a mature product in the prior art, which will not be described here.

[0047] In the process of S3, the first material is discharged from the discharge port 21 in the feeding pipe 2 from top to bottom, the second material is discharged from the discharge port 21 in the feeding pipe 2 from bottom to top, and the first material and the second material meet in the area of the discharge port 21, as shown in Figure 6When the discharge amount of the second material from the discharge port 21 is reduced, the discharge amount of the first material from the discharge port 21 is increased to supplement the consumption of the material circulating sorting process, the first material is the newly added material guided into the conveying pipe 2, and the second material is the circulating ground material guided into the conveying pipe 2.

[0048] The material on the rotating disc 15 is forced to be lifted to a high position through the conveying pipe 2, and then is discharged, sorted, and can timely discharge the ground fine powder, avoids that the fine powder occupies the volume of the rotating disc 15, and affects the processing efficiency, and the design that the circulating ground material and the newly added material are discharged from the discharge port 21, the circulating ground material is transmitted in the conveying pipe 2 from top to bottom, can control the discharge speed of the newly added material from the discharge port 21, makes the material supplement amount reach a dynamic balance state, guarantees that the grinding mechanism is in a high-efficiency working state, reduces the failure rate, and improves the production efficiency.

[0049] In the S4 process, the second driving motor 9 is started to control the rotating speed of the sorting sleeve 8, when the rotating speed of the sorting sleeve 8 increases, the flow rate of the airflow and the material in the annular area 12 increases, at the same time, the number of times that the flow guide port 24 coincides with the window 10 increases, the flow of the material guided into each bag pulse dust collector along with the airflow from the discharge pipe 7 increases, when the rotating speed of the sorting sleeve 8 decreases, the flow rate of the airflow and the material in the annular area 12 decreases, at the same time, the number of times that the flow guide port 24 coincides with the window 10 decreases, the flow of the material guided into each bag pulse dust collector along with the airflow from the discharge pipe 7 decreases.

[0050] It should be noted that when the rotating speed of the sorting sleeve 8 increases or decreases, the speed of the above V1, V2 and V3 can be adjusted under the pushing action of the baffle 25.

[0051] The use method of the material conveying device provided by the application can control the conveying speed of the circulating ground material and the feeding speed of the new material by controlling the rotating speed of the first driving motor 5 and rotating the spiral blade 3 at different rotating speeds, can control the discharge speed of the discharge pipe 7 and the airflow flow rate in the annular area 12 by controlling the rotating speed of the second driving motor 9 and rotating the sorting sleeve 8 at different rotating speeds, makes the airflow flow rate affecting the material falling speed and the discharge speed positively related, so as to be manually controlled, and provides conditions for automatic control of steel slag powder production.

[0052] The material conveying device provided by the application can be used in combination with a grinding mechanism, the conveying pipe 2 lifts the material on the rotating disc 15 to a high position, the material meeting the particle size requirement is discharged from the discharge pipe 7 through the sorting of the airflow and is collected respectively, the material not meeting the requirement falls to the rotating disc 15 again to be repeatedly ground, and the circulation is continued until the particle size of the material meets the requirement, so that the effect of circulating sorting is realized.

[0053] By setting the material conveying pipe 2 and the sorting sleeve 8, the material is lifted by the spiral blade 3 rotating in the material conveying pipe 2, and when the material is discharged from the discharge port 21 and falls, the material of different particle sizes is discharged from the discharge pipe 7 by using the airflow of different flow rates, the function of sorting the material of multiple different particle sizes is realized while conveying the steel slag powder, the sorting of the material of multiple levels is completed once, and the production efficiency is greatly improved.

[0054] The above merely describes the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacements or changes according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A material conveying device for preparing high-activity steel slag micro-powder, comprising a sorting mechanism, characterized in that: The sorting mechanism comprises a cover body (1), a feeding pipe (2) is fixedly installed in the cover body (1), a spiral blade (3) is rotatably installed in the feeding pipe (2), a feeding hopper (4) and a first driving motor (5) are fixedly installed at the top end of the feeding pipe (2), the first driving motor (5) drives the spiral blade (3) to rotate, an air inlet pipe (6) and three discharge pipes (7) are fixedly installed on the surface of the cover body (1); The inner cavity of the cover body (1) is a tapered cavity with a small upper end and a large lower end, a sorting sleeve (8) is rotatably installed in the tapered cavity, and a second driving motor (9) for driving the sorting sleeve (8) to rotate is fixedly installed at the top end of the cover body (1); A plurality of windows (10) are formed in the surface of the sorting sleeve (8), a plurality of partition rings (11) are fixedly installed on the inner wall of the sorting sleeve (8), the inner wall of the sorting sleeve (8) is divided into three annular regions (12) by the partition rings (11), the three annular regions (12) are arranged in an up-down position, and the three annular regions (12) are communicated with the discharge pipes (7) through the windows (10).

2. The material conveying device for preparing high-activity steel slag micro-powder according to claim 1, characterized in that: The cover body (1) is fixedly installed on the upper side of the grinding mechanism, and the lower end of the feeding pipe (2) extends into the interior of the grinding mechanism.

3. The material conveying device for preparing high-activity steel slag micro-powder according to claim 2, characterized in that: The grinding mechanism comprises a base (13), a material bin (14) is fixedly installed on the upper side of the base (13), a rotating disc (15) is rotatably installed in the material bin (14), a third driving motor (16) is fixedly installed in the interior of the base (13), the third driving motor (16) drives the rotating disc (15) to rotate horizontally, an installation plate (17) is rotatably installed on the base (13), the installation plate (17) can extend into the material bin (14) when swinging, a grinding roller (18) is rotatably installed on the inner side of the installation plate (17), a hydraulic oil cylinder (19) is rotatably installed on the base (13), and the extension end of the hydraulic oil cylinder (19) is movably connected with the outer side of the installation plate (17).

4. The material conveying device for preparing high-activity steel slag micro powder according to claim 3, characterized in that: The bottom end of the feeding pipe (2) extends to the upper side of the rotating disc (15), a feeding inlet (20) is formed between the lower end of the feeding pipe (2) and the upper surface of the rotating disc (15), a discharge port (21) is formed in the surface of the feeding pipe (2), the lower plane of the spiral blade (3) is in sliding contact with the upper surface of the rotating disc (15), and the upper end of the spiral blade (3) extends to the upper edge of the discharge port (21).

5. The material conveying device for preparing high-activity steel slag micro powder according to claim 4, characterized in that: A gear ring (22) is fixedly installed at the top end of the sorting sleeve (8), a driving gear (23) is fixedly installed at the rotating end of the second driving motor (9), the driving gear (23) is in meshing transmission with the gear ring (22), and a plurality of baffles (25) are fixedly installed on the lower side of each of the plurality of partition rings (11).

6. The material conveying device for preparing high-activity steel slag micro powder according to claim 5, characterized in that: The inner wall of the conical cavity of the cover body (1) is provided with three flow guide openings (24), the three flow guide openings (24) are respectively communicated with the discharge pipes (7), the outer wall of the sorting sleeve (8) is in sliding contact with the inner wall of the conical cavity of the cover body (1), when the flow guide openings (24) coincide with the windows (10), the inner cavity of the sorting sleeve (8) is communicated with the discharge pipes (7) through the flow guide openings (24) and the windows (10), when the outer wall of the sorting sleeve (8) coincides with the flow guide openings (24), the communication passage between the inner cavity of the sorting sleeve (8) and the discharge pipes (7) is cut off.

7. A method for using a material conveying device for preparing high-activity steel slag micro-powder, using the material conveying device for preparing high-activity steel slag micro-powder according to claim 6 to prepare steel slag micro-powder, characterized in that, The method comprises the following steps: S1, the material containing particles with different particle sizes is added into the feeding hopper (4), the material enters the cover body (1) from the discharge port (21), falls, air is injected into the cover body (1) through the air inlet pipe (6), the air forms a spiral upward airflow in the cover body (1), then the airflow is discharged from the discharge pipes (7) at different flow rates, part of the material is discharged from the discharge pipes (7) with the airflow, and the other part of the material falls onto the rotating disc (15); S2, the third driving motor (16) drives the rotating disc (15) to rotate, the hydraulic oil cylinder (19) drives the mounting plate (17) to reciprocate, the gap between the grinding roller (18) and the rotating disc (15) is adjusted, the material on the rotating disc (15) is crushed through the grinding of the grinding roller (18) on the surface of the rotating disc (15); S3, the first driving motor (5) is started, the spiral blade (3) is driven to rotate, the material on the rotating disc (15) enters the lower end of the feeding pipe (2) from the feeding inlet (20), is lifted by the spiral blade (3), and enters the cover body (1) from the discharge port (21), so that the circulation sorting of the material is realized; S4, the three discharge pipes (7) are respectively communicated with three bag-type pulse dust collectors through pipelines, the material is introduced into the bag-type pulse dust collectors with the airflow from the three discharge pipes (7), and the powders with different particle sizes are collected through the three bag-type pulse dust collectors.

8. The method of using a material conveying device for the production of high-activity steel slag micro-powder according to claim 7, characterized in that: In the S3 process, the first material is discharged from the discharge port (21) in the feeding pipe (2) from top to bottom, the second material is discharged from the discharge port (21) in the feeding pipe (2) from bottom to top, the first material and the second material meet in the area of the discharge port (21), when the discharge amount of the second material from the discharge port (21) decreases, the discharge amount of the first material from the discharge port (21) increases, and the consumption of the material in the circulation sorting process is supplemented.

9. The method of using a material conveying device for the production of high-activity steel slag micro-powder according to claim 8, characterized in that: In the S4 process, the second driving motor (9) is started, the rotating speed of the sorting sleeve (8) is controlled, when the rotating speed of the sorting sleeve (8) increases, the flow rate of the airflow and the material in the annular area (12) increases, at the same time, the coincidence frequency of the flow guide openings (24) and the windows (10) increases, the flow rate of the material introduced into the bag-type pulse dust collectors with the airflow from the discharge pipes (7) increases, when the rotating speed of the sorting sleeve (8) decreases, the flow rate of the airflow and the material in the annular area (12) decreases, at the same time, the coincidence frequency of the flow guide openings (24) and the windows (10) decreases, and the flow rate of the material introduced into the bag-type pulse dust collectors with the airflow from the discharge pipes (7) decreases.

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