A slag grinding device and a method for grinding blast furnace slag into round powder particles based on the device

Abstract

The present invention discloses a slag grinding device and a method for grinding blast furnace slag into round powder particles based on the device. The device comprises a housing, a grinding mechanism is provided at the upper end of the housing, the grinding mechanism comprises a motor housing, a second motor is provided inside the motor housing, a cone rod is connected to the output end of the second motor, a plurality of round balls are provided at the lower end of the cone rod, and a filter is provided at the lower end of the round balls. The device of the present invention has a filter installed at the upper end of the housing to block sheet and long strip slag from the outside, so that it returns to the grinding roller for further processing, and blocks irregularly shaped slag through a screen plate, so that it falls on the round balls and is ground into a regular round shape before being discharged. The blast furnace slag powder produced by the processing method of the device makes its micro powder into round particles, which is beneficial to the alkali excitation of other processing and is beneficial to the potential activity of the blast furnace slag powder during processing.

Description

Technical Field

[0001] The invention relates to the field of slag grinding, in particular to a slag grinding device and a method for grinding blast furnace slag into round powder particles. Background Art

[0002] Blast furnace slag is a waste product discharged from blast furnaces during the smelting of pig iron. High-performance granulated blast furnace slag powder offers significant technical and economic advantages for the production of precast concrete components. The performance requirements of granulated blast furnace slag powder exceed the S105 grade technical requirements of GB / T18046-2008, "Granulated blast furnace slag powder for use in cement and concrete." Tests conducted according to GB / T18046-2008 show a 7-day activity index greater than 95%, a 28-day activity index greater than 105%, a fluidity ratio greater than 95%, and a nearly spherical particle shape. Therefore, grinding blast furnace slag into rounded powder is crucial.

[0003] Most of the slag grinding machines currently on the market will produce flaky, square, and amorphous shapes in the slag after grinding, which is not conducive to alkali excitation, making it difficult to bring out the potential activity of blast furnace slag as early as possible. For this reason, we propose a slag grinding device and a method for grinding blast furnace slag into round powder particles based on the device to solve the above problems. Summary of the Invention

[0004] The slag grinding device proposed in the present invention solves the problem that most slag grinding machines on the market currently produce flaky, square, and amorphous slag after grinding, which is not conducive to alkali excitation and makes it difficult to bring out the potential activity of blast furnace slag as early as possible.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A slag grinding device comprises a box body, a grinding mechanism is provided at the upper end of the box body, two grinding rollers are provided inside the box body, a rotating plate is provided at the lower end of the grinding rollers, the grinding mechanism comprises a motor box, a second motor is provided inside the motor box, the output end of the second motor is connected to a conical rod, a plurality of round balls are provided at the lower end of the conical rod, a filter screen is provided at the lower end of the round balls, a discharge pipe is connected to the side of the motor box, and a mesh plate is connected inside the lower end of the discharge pipe.

[0007] Preferably, the lower end of the box body is connected to a support plate, a plurality of support rods are connected around the lower end of the support plate, a lower mesh plate is provided in the middle of the support plate, and the lower end of the support plate is connected to an air intake pipe.

[0008] Preferably, one end of the air inlet pipe is connected to a fan, the upper end of the lower mesh plate is connected to a fixing rod, the upper end of the fixing rod is connected to a limiting plate, and a rotating groove is provided in the middle of the lower end of the rotating plate.

[0009] Preferably, a limiting groove is provided at the upper end of the rotating groove, the fixing rod is arranged inside the rotating groove and is rotatably connected, and the limiting plate is arranged inside the limiting groove and is rotatably connected.

[0010] Preferably, a grinding groove is provided at the upper end of the rotating plate, the lower end of the grinding roller is connected to the grinding groove, two side boxes are connected to both sides of the box body, and a rotating rod is connected to the side of the grinding roller.

[0011] Preferably, one end of the rotating rod is connected to a first motor, two sides of the first motor are connected to two connecting plates, and the connecting plates are fixedly connected to the side box via a plurality of connecting rods.

[0012] Preferably, a feed pipe is connected to the side of the box body, the upper end of the feed pipe is connected to the feed port, the lower end of the feed pipe is arranged inside the box body, and a guide ring is arranged on the outer side of the lower end of the feed pipe.

[0013] Preferably, a fixing ring is sleeved on the lower end of the outer side of the motor box, the lower end of the fixing ring is connected and fixed to the upper end of the box body, and the upper end of the filter is connected to the inner upper end of the box body.

[0014] Preferably, a plurality of first rotating grooves are opened at the inner bottom of the filter screen, the balls are arranged inside the first rotating grooves, a plurality of second rotating grooves are opened at the lower end of the cone rod, and the balls are arranged inside the second rotating grooves.

[0015] Preferably, the screen plate is arranged at the inner upper end of the filter screen, the grinding roller is arranged in an inclined shape, and the lower end opening of the discharge pipe is arranged at the lower end of the motor box.

[0016] A method for rounding blast furnace slag powder particles based on the above-mentioned grinding device is characterized by comprising the following steps:

[0017] S1. Place the slag into the feed port, start the first motor to drive the rotating rod and grinding roller to rotate. The grinding roller rotates inside the grinding trough, driving the rotating plate to rotate along with the fixed rod. When the rotating plate rotates, the slag enters the grinding trough due to centrifugal force, and then is ground by the rotation of the grinding roller;

[0018] S2. Start the fan to let air enter the box through the air inlet pipe and the lower screen. The air blows the fine slag upward. When the fine slag touches the filter, the regular shaped slag will enter the filter, while the irregular shaped slag will be blocked by the filter and discharged for further processing.

[0019] S3. The slag entering the filter screen contacts the screen along with the air flow. The slag with a nearly circular shape will pass through the screen and then be discharged through the discharge pipe. The slag with a non-circular shape will be blocked by the screen and fall down along the cone rod to the lower end of the inner part of the filter screen. The second motor is started to drive the cone rod to rotate. The cone rod drives the ball to rotate along with the first rotating groove and the second rotating groove to grind the slag with a non-circular shape. When it is ground into a nearly circular shape, it is discharged through the screen and the discharge pipe.

[0020] The beneficial effects of the present invention are:

[0021] This slag grinding device has a filter installed on the upper end of the inner part of the box, which can block the flake and long strip slag outside and return it to the grinding roller for further processing. It also blocks the irregularly shaped slag through the screen plate and makes it fall on the round bead. It can be ground into a regular circle before it can be discharged. While performing the final mechanical excitation on the blast furnace slag, it is also conducive to alkali excitation, so that the potential activity of the blast furnace slag can be brought into play as early as possible, making it a high-quality mineral admixture.

[0022] The slag grinding device blocks the non-round slag on both sides, reduces the grinding pressure at the upper end of the round ball, prevents the round ball from wearing out prematurely, and increases the service life of the equipment.

[0023] The device has a filter installed at the upper end of the inner part of the box, which can block the flake and long strip slag outside and return it to the grinding roller for further processing. It also blocks the irregularly shaped slag through the mesh plate and makes it fall on the round ball, which is then ground into a regular circle before it can be discharged.

[0024] The blast furnace slag powder produced by the device processing method makes its micro powder into round granular powder, which is completely suitable for other processing, is beneficial to the alkali excitation of other processing, and is beneficial to the potential activity of the blast furnace slag powder during processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the front perspective structure of the present invention.

[0026] Figure 2 It is a schematic diagram of the rear perspective structure of the present invention.

[0027] Figure 3 It is a schematic diagram of the front cross-sectional structure of the present invention.

[0028] Figure 4 It is a schematic diagram of the cross-sectional structure of the shell of the present invention.

[0029] Figure 5 It is a schematic diagram of the viewing angle structure of the rotating plate of the present invention.

[0030] Figure 6It is a schematic diagram of the front cross-section structure of the motor box of the present invention.

[0031] Figure 7 It is a schematic diagram of the cross-sectional side structure of the motor box of the present invention.

[0032] Figure 8 It is a schematic structural diagram of the side cross-sectional view of the present invention.

[0033] Numbers in the figure: 1. Box body; 2. Support plate; 3. Support rod; 4. Air inlet pipe; 5. Fan; 6. First motor; 7. Feed pipe; 8. Feed port; 9. Motor box; 10. Fixed ring; 11. Discharge pipe; 12. Side box; 13. Connecting plate; 14. Connecting rod; 15. Guide ring; 16. Grinding roller; 17. Rotating rod; 18. Rotating plate; 19. Lower screen; 20. Limiting plate; 21. Fixed rod; 22. Second motor; 23. Filter; 24. Grinding trough; 25. Limiting groove; 26. Rotating trough; 27. Conical rod; 28. Ball; 29. ​​First rotating trough; 30. Second rotating trough; 31. Upper screen. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] Reference Figures 1-8 As shown, this embodiment provides a slag grinding device, including a box body 1, a grinding mechanism is provided at the upper end of the box body 1, two grinding rollers 16 are provided inside the box body 1, and a rotating plate 18 is provided at the lower end of the grinding roller 16. The grinding mechanism includes a motor box 9, a second motor 22 is provided inside the motor box 9, the output end of the second motor 22 is connected to a cone rod 27, a plurality of round balls 28 are provided at the lower end of the cone rod 27, and a filter screen 23 is provided at the lower end of the round balls 28. The side of the motor box 9 is connected to a discharge pipe 11, and the lower end of the discharge pipe 11 is internally connected to a mesh plate 31. The filter screen 23 is used to block irregular slag for the first time and reduce the grinding pressure of the round balls 28.

[0036] like Figures 1-4As shown, the lower end of the box body 1 is connected to a support plate 2, and a plurality of support rods 3 are connected around the lower end of the support plate 2. A lower mesh plate 19 is provided in the middle of the support plate 2, and the lower end of the support plate 2 is connected to an air inlet pipe 4, and one end of the air inlet pipe 4 is connected to a fan 5. The upper end of the lower mesh plate 19 is connected to a fixing rod 21, and the upper end of the fixing rod 21 is connected to a limiting plate 20. A rotating groove 26 is provided in the middle of the lower end of the rotating plate 18, and a limiting groove 25 is provided at the upper end of the rotating groove 26. The fixing rod 21 is arranged inside the rotating groove 26 and is rotatably connected. The limiting plate 20 is arranged inside the limiting groove 25 and is rotatably connected. Then, the fixing rod 21 is used to lift the rotating plate 18 to prevent the rotating plate 18 from blocking the lower mesh plate 19, which prevents air from entering the interior of the box body 1. A grinding trough 24 is provided at the upper end of the rotating plate 18, and the lower end of the grinding roller 16 is connected to the grinding trough 24. Two side boxes 12 are connected to both sides of the box body 1, and a rotating rod 17 is connected to the side of the grinding roller 16. One end of the rotating rod 17 is connected to the first motor 6. Two connecting plates 13 are connected to both sides of the first motor 6. The connecting plate 13 is fixed to the side box 12 by multiple connecting rods 14. The grinding trough 24 is used to collect slag therein for convenient and rapid grinding.

[0037] like Figure 5-Figure 8 As shown, a feed pipe 7 is connected to the side of the box body 1, and the upper end of the feed pipe 7 is connected to the feed port 8. The lower end of the feed pipe 7 is arranged inside the box body 1, and a guide ring 15 is arranged on the outside of the lower end of the feed pipe 7. The lower end of the outer side of the motor box 9 is sleeved with a fixing ring 10, and the lower end of the fixing ring 10 is fixedly connected to the upper end of the box body 1. The upper end of the filter screen 23 is connected to the upper end of the inner part of the box body 1, and a plurality of first rotating grooves 29 are provided at the bottom of the inner part of the filter screen 23, and the round balls 28 are arranged inside the first rotating grooves 29. The lower end of the cone rod 27 is provided with a plurality of second rotating grooves 30, and the round balls 28 are arranged inside the second rotating grooves 30. The screen plate 31 is arranged at the upper end of the inner part of the filter screen 23, and the grinding roller 16 is arranged in an inclined shape. The lower end opening of the discharge pipe 11 is arranged at the lower end of the motor box 9, and the cone rod 27 is used to slide the slag blocked by the screen plate 31 to the round balls 28 along its side wall.

[0038] The working principle of the present invention is also a method for grinding blast furnace slag into round powder particles: when in use, slag is placed into the inside of the feed port 8, the slag enters the inside of the box body 1 through the feed pipe 7, and is then guided to the rotating plate 18 by the guide ring 15. The first motor 6 is started to drive the rotating rod 17 to rotate, and the rotating rod 17 drives the grinding roller 16 to rotate. The grinding roller 16 rotates inside the grinding trough 24, driving the rotating plate 18 to rotate along with the fixed rod 21. When the rotating plate 18 rotates, the slag enters the inside of the grinding trough 24 due to centrifugal force, and is then ground by the rotation of the grinding roller 16;

[0039] Start the fan 5 to let air enter the interior of the box 1 through the air inlet pipe 4 and the lower mesh plate 19. The air blows the fine slag upward. When the fine slag contacts the filter 23, the regular shaped slag will enter the interior of the filter 23, while the irregular shaped slag will be blocked by the filter 23 and discharged for further processing.

[0040] The slag entering the filter 23 comes into contact with the screen plate 31 along with the air flow. The slag with a nearly circular shape will pass through the screen plate 31 and then be discharged through the discharge pipe 11. The slag with a non-circular shape will be blocked by the screen plate 31 and fall down along with the cone rod 27 to the lower end of the inner part of the filter 23. The second motor 22 is started to drive the cone rod 27 to rotate. The cone rod 27 drives the ball 28 to rotate along with the first rotating groove 29 and the second rotating groove 30, grinding the slag with a non-circular shape. When it is ground into a nearly circular shape, it is discharged through the screen plate 31 and the discharge pipe 11.

[0041] After testing, the blast furnace slag powder produced by the device processing method makes its micro powder into round particles, which fully meets the relevant standards for use, is suitable for other processing, is beneficial to the alkali activation of other processing, and is beneficial to the potential activity of the blast furnace slag powder during processing.

[0042] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A slag grinding device, comprising a housing (1), characterized in that: The upper end of the box body (1) is provided with a grinding mechanism, two grinding rollers (16) are provided inside the box body (1), and a rotating plate (18) is provided at the lower end of the grinding roller (16). The grinding mechanism includes a motor box (9), a second motor (22) is provided inside the motor box (9), the output end of the second motor (22) is connected to a cone rod (27), a plurality of round balls (28) are provided at the lower end of the cone rod (27), and a filter screen (23) is provided at the lower end of the round balls (28). The side of the motor box (9) is connected to a discharge pipe (11), and the lower end of the discharge pipe (11) is internally connected to a screen plate (31). The bottom of the filter screen (23) is provided with a plurality of first rotating grooves (29), and the round balls (28) are provided inside the first rotating grooves (29). The lower end of the cone rod (27) is provided with a plurality of second rotating grooves (30), and the round balls (28) are provided inside the second rotating grooves (30). The lower end of the box body (1) is connected to a support plate (2), a lower mesh plate (19) is provided in the middle of the support plate (2), the lower end of the support plate (2) is connected to an air intake pipe (4), one end of the air intake pipe (4) is connected to a fan (5), the upper end of the lower mesh plate (19) is connected to a fixing rod (21), the upper end of the fixing rod (21) is connected to a limiting plate (20), a rotating groove (26) is provided in the middle of the lower end of the rotating plate (18), and the rotating groove (26) The upper end of the box (18) is provided with a limiting groove (25), the fixing rod (21) is arranged inside the rotating groove (26) and is rotatably connected, the limiting plate (20) is arranged inside the limiting groove (25) and is rotatably connected, the upper end of the rotating plate (18) is provided with a grinding groove (24), the lower end of the grinding roller (16) is connected to the grinding groove (24), two side boxes (12) are connected to both sides of the box body (1), and the side of the grinding roller (16) is connected to a rotating rod (17). A feed pipe (7) is connected to the side of the box body (1), the upper end of the feed pipe (7) is connected to a feed port (8), the lower end of the feed pipe (7) is arranged inside the box body (1), and a guide ring (15) is arranged on the outer side of the lower end of the feed pipe (7).

2. A slag grinding device according to claim 1, characterized in that: A plurality of support rods (3) are connected around the lower end of the support plate (2).

3. A slag grinding device according to claim 2, characterized in that: One end of the rotating rod (17) is connected to a first motor (6), two sides of the first motor (6) are connected to two connecting plates (13), and the connecting plates (13) are fixedly connected to the side box (12) through a plurality of connecting rods (14).

4. The slag grinding device according to claim 1, characterized in that: The lower end of the outer side of the motor box (9) is sleeved with a fixing ring (10), the lower end of the fixing ring (10) is connected and fixed to the upper end of the box body (1), and the upper end of the filter screen (23) is connected to the inner upper end of the box body (1).

5. The slag grinding device according to claim 1, characterized in that: The screen plate (31) is arranged at the inner upper end of the filter screen (23), the grinding roller (16) is arranged in an inclined shape, and the lower end opening of the discharge pipe (11) is arranged at the lower end of the motor box (9).

6. A method for rounding blast furnace slag powder particles using the grinding device according to any one of claims 1 to 5, characterized in that: The following methods are included: S1. Place the slag into the feed port, start the first motor to drive the rotating rod and grinding roller to rotate. The grinding roller rotates inside the grinding trough, driving the rotating plate to rotate along with the fixed rod. When the rotating plate rotates, the slag enters the grinding trough due to centrifugal force, and then is ground by the rotation of the grinding roller; S2. Start the fan to let air enter the box through the air inlet pipe and the lower screen. The air blows the fine slag upward. When the fine slag touches the filter, the regular shaped slag will enter the filter, while the irregular shaped slag will be blocked by the filter and discharged for further processing. S3. The slag entering the filter screen contacts the screen along with the air flow. The slag with a nearly circular shape will pass through the screen and then be discharged through the discharge pipe. The slag with a non-circular shape will be blocked by the screen and fall down along the cone rod to the lower end of the inner part of the filter screen. The second motor is started to drive the cone rod to rotate. The cone rod drives the ball to rotate along with the first rotating groove and the second rotating groove to grind the slag with a non-circular shape. When it is ground into a nearly circular shape, it is discharged through the screen and the discharge pipe.

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