Steel slag liquid granulating device

Abstract

The invention discloses a molten steel slag granulating device and relates to the technical field of blast furnace slag treatment. The invention aims to solve the problems that heat cannot be recycled and water consumption is large when slag is treated by adopting a water quenching method in the prior art. The device comprises a slag ladle, a shell, a driving motor, a particle throwing disc and a fan, the slag ladle is provided with a slag discharging pipe extending downwards, a slag discharging opening is formed in the slag discharging pipe, steel slag liquid in the slag ladle flows into a circular groove through the slag discharging opening, the shell is located below the slag ladle, a ventilation hole is formed in the side wall of the shell, and a particle discharging opening is formed in the bottom of the shell. The driving end of the driving motor is connected with a rotating shaft, the rotating shaft extends upwards into the shell, and the particle throwing disc is matched with the driving motor, so that slag forms a spiral motion track in the particle throwing disc, the residence time is prolonged, uniform acceleration is achieved, particles are thrown uniformly and thoroughly, accumulation is avoided, and waste heat can be recycled through airflow heat exchange in the particle throwing process; and a large amount of cooling water does not need to be used in the centrifugal granulation process, the water consumption is reduced, and water resources are saved.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace slag treatment, and in particular to a slag liquid granulation device. Background Art

[0002] During the blast furnace steelmaking process, slag needs to be discharged from the blast furnace hearth to avoid accumulation in the furnace and affecting smelting efficiency.

[0003] Traditional slag treatment methods mostly use water quenching or dry slag pit cooling. The water quenching method is to pour the molten blast furnace slag into water for rapid cooling, and granulate it under the action of thermal stress. The slag particles obtained after water quenching are mostly amorphous and are excellent cement admixtures. This method realizes the bulk disposal of blast furnace slag.

[0004] However, this method will cause most of the water to evaporate directly into the atmosphere at high temperature. This heat cannot be recycled, and a large amount of fresh water resources is wasted, resulting in high water consumption.

[0005] In summary, the existing water quenching method for treating slag has the problems of heat being unable to be recycled and high water consumption. Summary of the Invention

[0006] The purpose of the present invention is to solve the problem of heat recovery and high water consumption in the existing water quenching method for treating slag, and further provide a slag liquid granulation device.

[0007] The technical solution of the present invention is: a molten steel slag granulation device, comprising: a slag ladle, having a slag discharge pipe extending downward, the slag discharge pipe being provided with a slag discharge port, and the molten steel slag in the slag ladle flows into a circular trough through the slag discharge port;

[0008] A shell is located below the slag bag, with ventilation holes provided on the side walls of the shell and a particle discharge port provided on the bottom of the shell;

[0009] A driving motor, wherein a driving end is connected to a rotating shaft, and the rotating shaft extends upward into the housing;

[0010] A particle throwing disc is mounted on the portion of the rotating shaft located in the housing. The middle portion of the particle throwing disc has a downwardly concave circular groove. The sidewalls of the circular groove have particle throwing grooves extending radially outward. The particle throwing grooves have a plurality of grooves evenly distributed along the circumference.

[0011] A fan, wherein the air outlet of the fan is connected to the interior of the shell through an air duct.

[0012] Furthermore, the bottom wall of the particle throwing chute is tilted downward.

[0013] Furthermore, it also includes: an air cutting ring, which is installed in the shell and located below the particle throwing plate. The air cutting ring has an oblique air outlet and an air inlet arranged along the circumference. The blowing direction of the oblique air outlet is perpendicular to the particle throwing direction of the particle throwing plate, and the air inlet is connected to the air outlet of the fan.

[0014] Furthermore, the particle-throwing disc and the gas-cutting ring each have a plurality of them spaced apart in the height direction, and one gas-cutting ring is provided under each particle-throwing disc;

[0015] The adjacent gas cutting rings are connected by a support plate, and the adjacent particle throwing plates are connected by bolts.

[0016] Furthermore, the slag discharge pipe passes downward through the circular grooves of multiple particle throwing plates in sequence and stays above the circular groove of the lowest particle throwing plate, and the slag discharge ports are respectively located on the bottom and side surfaces of the slag discharge pipe.

[0017] Furthermore, the slag ladle is provided with an inclined and / or curved guide plate.

[0018] Furthermore, it also includes: a flow regulating component, including a suspension rod and a driving member, the suspension rod is inserted downward into the inlet of the slag discharge pipe, the suspension rod is connected to the driving end of the driving member, and the driving member is used to drive the suspension rod to move up and down.

[0019] Furthermore, the driving member is a horizontally arranged reducer, the reducer is connected to a drive shaft, the drive shaft is connected to a first helical gear, the outer side of the boom is threadedly connected to a sleeve, and the sleeve is connected to a second helical gear meshing with the first helical gear;

[0020] The suspension rod is slidably matched with the limiting sleeve to prevent the suspension rod from rotating.

[0021] Furthermore, it also includes: a detection rod that rises and falls synchronously with the boom and is located outside the slag bag, the detection rod is provided with a scale line, and the movement distance of the boom is determined by raising and lowering the detection rod at the scale line.

[0022] Furthermore, the driving shaft is connected to a turntable, a connecting rope is wound around the turntable, and the connecting rope passes through the detection rod and is connected to a counterweight at the free end.

[0023] Compared with the prior art, the present invention has the following effects:

[0024] 1. The slag liquid granulation device provided by the present invention cooperates with the particle throwing disk and the driving motor to make the slag form a spiral motion trajectory in the particle throwing disk, prolong the residence time and accelerate evenly, throw the particles evenly and throw them out thoroughly to avoid accumulation, and in the particle throwing process, the waste heat can be recovered by air flow heat exchange, thereby improving energy utilization. The centrifugal granulation process does not require the use of a large amount of cooling water, reducing water consumption and saving water resources.

[0025] 2. In the slag liquid granulation device provided by the present invention, the gas blown out by the gas cutting ring can cut off the particle line of the thrown slag to obtain more ideal granular particles. It can also quickly cool the surface of the molten steel to a certain extent, reducing the risk of adhesion to the wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 yes Figure 1 Enlarged view of the middle boom;

[0028] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure of the middle particle removal plate;

[0029] Figure 4 yes Figure 3 Front view of

[0030] Figure 5 yes Figure 3 sectional view of

[0031] Figure 6 yes Figure 5 Front view of .

[0032] In the figure: 1. Slag bag; 2. Slag discharge pipe; 3. Slag discharge port; 4. Circular groove; 5. Shell; 6. Ventilation hole; 7. Particle discharge port; 8. Driving motor; 9. Rotating shaft; 10. Particle throwing disc; 11. Particle throwing trough; 12. Air cutting ring; 13. Oblique air outlet; 14. Support plate; 15. Guide plate; 16. Hanging rod; 17. Driving member; 18. Driving shaft; 19. First helical gear; 20. Sleeve; 21. Second helical gear; 22. Detection rod; 23. Scale line; 24. Turntable; 25. Connecting rope; 26. Counterweight; 27. Limit sleeve. DETAILED DESCRIPTION

[0033] Specific implementation method 1: Combination Figures 1 to 4To illustrate this embodiment, this embodiment includes a slag bag 1, a shell 5, a drive motor 8, a particle throwing disc 10 and a fan (not shown in the figure). The slag bag 1 has a slag discharge pipe 2 extending downward, and the slag discharge pipe 2 is provided with a slag discharge port 3. The steel slag liquid in the slag bag 1 flows into the circular groove 4 through the slag discharge port 3. The shell 5 is located below the slag bag 1. The side wall of the shell 5 is provided with a ventilation hole 6, and the bottom of the shell 5 is provided with a particle discharge port 7. The driving end of the drive motor 8 is connected to the rotating shaft 9, and the rotating shaft 9 extends upward into the shell 5. The particle throwing disc 10 is installed on the part of the rotating shaft 9 located in the shell 5. The middle position of the particle throwing disc 10 has a downwardly concave circular groove 4, and the side wall of the circular groove 4 has a particle throwing groove 11 extending radially outward. The particle throwing groove 11 has a plurality of particles evenly distributed along the circumferential direction. The air outlet of the fan is connected to the interior of the shell 5 through an air duct.

[0034] In the steel slag liquid granulation device of this embodiment, the particle throwing plate 10 and the drive motor 8 cooperate to make the slag form a spiral motion trajectory in the particle throwing plate 10, extend the residence time and accelerate evenly, throw the particles evenly and thoroughly to avoid accumulation, and in the particle throwing process, the waste heat can be recovered by air flow heat exchange, thereby improving energy utilization. The centrifugal granulation process does not require the use of a large amount of cooling water, reducing water consumption and saving water resources.

[0035] Specific implementation method 2: Combination Figures 3 to 6 This embodiment is described. The difference between this embodiment and the first embodiment is that the bottom wall of the pelletizing trough 11 is tilted downward, which allows the slag liquid to smoothly enter each pelletizing trough 11 to prevent splashing. The other components and connection relationships are the same as those of the first embodiment.

[0036] Specific implementation method three: Combination Figure 1 、 Figure 3 The present embodiment is described. The present embodiment differs from the specific embodiment 1 in that it also includes: an air cutting ring 12, which is installed in the housing 5 and is located below the particle throwing disc 10. The air cutting ring 12 has an oblique air outlet 13 and an air inlet arranged along the circumferential direction. The blowing direction of the oblique air outlet 13 is perpendicular to the particle throwing direction of the particle throwing disc 10. The air inlet is connected to the air outlet of the fan. The wind blown by the fan enters the air cutting ring 12 and is then discharged by the oblique air outlet 13 of the air cutting ring 12. The blown gas can cut off the steel slag particle line thrown out to obtain more ideal granular particles. It can also quickly cool the surface of the small molten steel to a certain extent, reducing the risk of adhesion and wall hanging. Other components and connection relationships are the same as those in the specific embodiment 1.

[0037] Specific implementation method four: Combination Figure 1 、 Figure 3The present embodiment is described. The present embodiment differs from the specific embodiment 3 in that both the particle-throwing disc 10 and the gas-slicing ring 12 have a plurality of gas-slicing rings 12 spaced apart in the height direction. A gas-slicing ring 12 is provided below each particle-throwing disc 10. In the present embodiment, the number of gas-slicing rings 12 and the particle-throwing disc 10 is three, wherein the two gas-slicing rings 12 above are annular structures, and the gas-slicing ring 12 at the bottom is a trumpet-shaped structure, which is formed by adding vertical ribs in the middle of the inner and outer layers of the flared opening to evenly divide the interior of the trumpet flared opening into a number of units.

[0038] Adjacent gas cutting rings 12 are connected by support plates 14. Specifically, the lowest gas cutting ring 12 is installed on the platform in the housing 5. The two upper gas cutting rings 12 are connected by support plates 14 respectively. The adjacent grain-throwing discs 10 are connected by bolts. Specifically, the lowest grain-throwing disc 10 is fixedly connected to the rotating shaft 9. The two upper grain-throwing discs 10 are connected to the lowest grain-throwing disc 10 by bolts. Moreover, the grain-throwing disc 10 and the gas cutting ring 12 are all detachable, which is convenient for adjustment according to actual needs. Other components and connection relationships are the same as those in the specific embodiment three.

[0039] Specific implementation method five: Combination Figure 1 、 Figure 3 This embodiment is described. The difference between this embodiment and the fourth embodiment is that the slag discharge pipe 2 passes through the circular grooves 4 of multiple particle-throwing discs 10 downward in sequence and stays above the circular groove 4 of the lowest particle-throwing disc 10. The slag discharge ports 3 are respectively located on the bottom and side surfaces of the slag discharge pipe 2. The slag liquid is discharged outward through the side and bottom surfaces of the slag discharge pipe 2 and then flows into the particle-throwing trough 11. Other components and connection relationships are the same as those of the fourth embodiment.

[0040] Specific implementation method six: combination Figure 1 This embodiment differs from the first embodiment in that a guide plate 15 is provided within the slag ladle 1, arranged in an inclined and / or curved configuration. In this embodiment, the guide plate 15 can be configured in three configurations: curved, inclined, and both curved and inclined. The molten slag flows back along the guide plate 15 to the bottom of the slag ladle 1, preventing splashing and reducing safety hazards. Other components and connections are the same as those in the first embodiment.

[0041] Specific implementation method seven: combination Figure 1 、 Figure 2 This embodiment differs from the first embodiment in that it also includes a flow regulating assembly, comprising a suspension rod 16 and a driving member 17. Suspension rod 16 is inserted downwardly into the inlet of slag discharge pipe 2 and is connected to the driving end of driving member 17. Driving member 17 is used to drive suspension rod 16 up and down, thereby regulating the flow rate to meet actual usage requirements. Other components and connections are the same as those of any of the first to sixth embodiments.

[0042] Specific implementation method eight: combined with FIG Figure 1 、 Figure 2 This embodiment differs from the seventh embodiment in that the drive member 17 is a horizontally arranged reducer connected to a drive shaft 18, which is connected to a first helical gear 19. A sleeve 20 is threadedly connected to the outer side of the boom 16, which is connected to a second helical gear 21 that meshes with the first helical gear 19. The sleeve 20 is rotatably mounted within a box located above the slag ladle 1. A limiting sleeve 27 is fixedly mounted within the box located above the slag ladle 1. The boom 16 and the limiting sleeve 27 slidably engage to prevent rotation. The remaining components and connections are the same as those of the seventh embodiment.

[0043] Specific implementation method nine: Combination Figure 1 、 Figure 2 This embodiment differs from the eighth embodiment in that it further includes a detection rod 22 that rises and falls synchronously with the boom 16 and is located outside the slag ladle 1. A scale line 23 is provided on the detection rod 22. The movement distance of the boom 16 is determined by raising and lowering the detection rod 22 at the scale line 23. Other components and connections are the same as those of the eighth embodiment.

[0044] Specific implementation method ten: Combination Figure 1 、 Figure 2 This embodiment differs from the ninth embodiment in that a rotary disk 24 is connected to the drive shaft 18, a connecting rope 25 is wound around the rotary disk 24, and the connecting rope 25 passes through the detection rod 22 and is connected to a counterweight 26 at its free end. The counterweight 26 ensures that the connecting rope 25 remains straight, thereby accurately driving the detection rod 22 to rise and fall. The other components and connection relationships are the same as those of the ninth embodiment.

[0045] How to use this implementation:

[0046] Start the drive motor 8, which drives the particle throwing plate 10 to rotate through the rotating shaft 9. At the same time, the fan delivers cooling air to the shell 5 and the air cutting ring 12. The cooling air in the air cutting ring 12 is blown out from the oblique air outlet 13 to cut the particles thrown out of the particle throwing trough 11. The cooling air in the shell 5 cools the particles, and the heated gas is discharged from the air exchange hole 6 for heat exchange.

Claims

1. A slag liquid granulation device, characterized in that: include: A slag ladle (1) has a slag discharge pipe (2) extending downward, the slag discharge pipe (2) is provided with a slag discharge port (3), and the molten steel slag in the slag ladle (1) flows into the circular trough (4) through the slag discharge port (3); A shell (5) is located below the slag bag (1), a side wall of the shell (5) is provided with a ventilation hole (6), and a bottom of the shell (5) is provided with a particle discharge port (7); A driving motor (8), a driving end of which is connected to a rotating shaft (9), wherein the rotating shaft (9) extends upward into the housing (5); A particle throwing plate (10) is mounted on the portion of the rotating shaft (9) located inside the housing (5), wherein a downwardly recessed circular groove (4) is provided in the middle of the particle throwing plate (10), and a sidewall of the circular groove (4) is provided with particle throwing grooves (11) extending radially outward, wherein the particle throwing grooves (11) are provided with a plurality of particles evenly distributed along the circumferential direction; A fan, wherein the air outlet of the fan is connected to the interior of the housing (5) through an air duct.

2. The slag liquid granulation device according to claim 1, characterized in that: The bottom wall of the pellet throwing chute (11) is tilted downward.

3. The slag liquid granulation device according to claim 1, characterized in that: Also includes: An air cutting ring (12) is installed in the housing (5) and is located below the particle throwing disc (10). The air cutting ring (12) has an oblique air outlet (13) and an air inlet arranged along the circumference. The blowing direction of the oblique air outlet (13) is perpendicular to the particle throwing direction of the particle throwing disc (10), and the air inlet is connected to the air outlet of the fan.

4. The slag liquid granulation device according to claim 3, characterized in that: The particle throwing disc (10) and the gas cutting ring (12) both have a plurality of particles spaced apart in the height direction, and one gas cutting ring (12) is provided below each particle throwing disc (10); Adjacent gas cutting rings (12) are connected via support plates (14), and adjacent particle throwing discs (10) are connected via bolts.

5. The slag liquid granulation device according to claim 4, characterized in that: The slag discharge pipe (2) passes downward through the circular grooves (4) of the plurality of particle-throwing discs (10) in sequence and stops above the circular groove (4) of the lowest particle-throwing disc (10). The slag discharge ports (3) are respectively located on the bottom and side surfaces of the slag discharge pipe (2).

6. The slag liquid granulation device according to claim 1, characterized in that: The slag ladle (1) has a guide plate (15) arranged in an inclined and / or curved manner.

7. A slag liquid granulation device according to any one of claims 1 to 6, characterized in that: It also includes: a flow regulating component, including a suspension rod (16) and a driving member (17), wherein the suspension rod (16) is inserted downward into the inlet of the slag discharge pipe (2), the suspension rod (16) is connected to the driving end of the driving member (17), and the driving member (17) is used to drive the suspension rod (16) to move up and down.

8. The slag liquid granulation device according to claim 7, characterized in that: The driving member (17) is a horizontally arranged speed reducer, the speed reducer is connected to a driving shaft (18), the driving shaft (18) is connected to a first helical gear (19), the outer side of the suspension rod (16) is threadedly connected to a sleeve (20), and the sleeve (20) is connected to a second helical gear (21) meshing with the first helical gear (19); The suspension rod (16) and the limiting sleeve (27) are slidably matched to prevent the suspension rod (16) from rotating.

9. The slag liquid granulation device according to claim 8, characterized in that: Also includes: A detection rod (22) is synchronously raised and lowered with the boom (16) and is located outside the slag bag (1). A scale line (23) is provided on the detection rod (22). The movement distance of the boom (16) is determined by raising and lowering the detection rod (22) at the scale line (23).

10. The slag liquid granulation device according to claim 9, characterized in that: The driving shaft (18) is connected to a turntable (24), a connecting rope (25) is wound around the turntable (24), and the connecting rope (25) passes through the detection rod (22) and is connected to a counterweight (26) at a free end.

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