Fine grinding device and blast furnace granulated slag powder production line

Abstract

The invention discloses a fine grinding device and a blast furnace granulated slag powder production line, relates to the technical field of slag treatment, and solves the technical problems in the prior art that slag powder subjected to fine grinding is difficult to separate quickly and excessive grinding is easy to occur. Comprising a tank body, a concave guide plate and a sieve plate are sequentially installed in the tank body from top to bottom, a rotary disc is installed at the center of the sieve plate, an air ring of a hollow structure is arranged on the edge of the top of the rotary disc in an attached mode, an annular cover attached to the rotary disc is arranged in the air ring, and a machining mechanism is arranged between the annular cover and the air ring; the machining mechanism comprises a discharging piece, a driving mechanism, a rolling mechanism and a linkage control mechanism, the discharging piece and the driving mechanism are both installed in the tank body, and the discharging piece is connected with the annular cover. According to the slag powder fine grinding device, intermittent discharging is conducted in the fine grinding process of slag powder, the slag powder obtained after fine grinding is not prone to being affected by supplemented slag, and the slag powder obtained after fine grinding is rapidly separated out conveniently and prevented from being excessively ground.

Description

Technical Field

[0001] The invention relates to the technical field of slag processing, and in particular to a fine grinding device and a blast furnace granulated slag powder production line. Background Art

[0002] Granulated blast furnace slag is a byproduct of blast furnace ironmaking in the steel production process. When iron ore, coke and flux are heated to a high temperature and molten state in a blast furnace, in addition to liquid pig iron, a portion of molten waste slag is also produced. These waste slags are solidified into granular substances by rapid cooling (usually with water), which is granulated slag. This granulated slag has a glassy structure and contains a variety of silicates and other components. After processing, it can become a high-quality building material. The role of the fine grinding device in the blast furnace granulated slag powder production line is to further crush the granulated slag into very fine particles. The finely ground granulated blast furnace slag powder can replace part of the cement, which not only reduces the cost, but also reacts with free calcium hydroxide in concrete due to its active ingredients to form more stable hydration products, thereby improving the overall performance of concrete.

[0003] At present, grinding mills are widely used in the fine grinding process of blast furnace granulated slag. However, this equipment faces a key problem in actual operation, that is, it is difficult to quickly separate the qualified slag powder after fine grinding. Due to the design principle and working mode of the grinding mill, materials are continuously added to the grinding area during the fine grinding process, which makes it impossible to separate the slag powder that has met the particle size requirements from the system in time, and it continues to remain in the grinding environment. This leads to two major problems: first, the slag powder is mixed with the slag particles that do not meet the standards, resulting in inconsistent product quality; second, because the slag powder continues to exist in the grinding area, they will undergo unnecessary repeated grinding processes. Repeated grinding not only wastes energy and increases production costs, but may also lead to over-grinding of slag powder, that is, excessive crushing. Over-grinding will make the particle size of slag powder too small, affecting its performance as a building material. Summary of the invention

[0004] The object of the present invention is to provide a fine grinding device and a blast furnace granulated slag powder production line, which solves the problem in the prior art that qualified fine-ground slag powder is difficult to separate quickly and is prone to over-grinding.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A fine grinding device comprises a tank body, in which a concave material guide plate and a sieve plate are installed in sequence from top to bottom, a turntable is installed at the center of the sieve plate, a hollow air ring is fitted at the top edge of the turntable, an annular cover fitted with the turntable is provided in the air ring, a processing mechanism is provided between the annular cover and the air ring; the processing mechanism comprises a material discharge part, a driving mechanism, a rolling mechanism and a linkage control mechanism, the material discharge part and the driving mechanism are both installed in the tank body, and the material discharge part is connected to the annular cover, the rolling mechanism is installed between the air ring and the annular cover, the driving mechanism is used to drive the turntable to rotate, and the blast furnace granulated slag is ground through the rolling mechanism when the turntable rotates, the linkage control mechanism is arranged in the material discharge part, the linkage control mechanism is used to control the lifting and lowering of the air ring, and to blow air when the air ring descends.

[0006] As a further solution of the present invention: the unloading part includes a cylinder, a diverter hood, a second connecting rod and a support rod, the bottom of the cylinder can cover the wind ring, and the bottom of the cylinder is provided with an annular opening, the diverter hood is a conical structure, and the diverter hood is connected to the top of the cylinder, the cylinder is connected to the inner wall of the tank through multiple second connecting rods, and the bottom of the cylinder is connected to the top of the annular hood through several support rods.

[0007] As a further solution of the present invention: the driving mechanism includes a convex ring, a fixed cylinder, a motor and a first connecting rod, the convex ring is coaxially connected to the bottom of the turntable, and the convex ring is rotatably connected to the fixed cylinder through a bearing, the motor is installed on the inner lower surface of the fixed cylinder, and the output shaft of the motor is coaxially connected to the turntable, and the fixed cylinder is connected to the inner wall of the tank body through multiple first connecting rods.

[0008] As a further solution of the present invention: the rolling mechanism includes a pressure roller with a rotating shaft, a main bevel gear, a secondary bevel gear, a rotating pin, a transmission gear and an outer gear ring, a plurality of the pressure rollers are circumferentially arranged between the air ring and the annular cover, the rotating shaft is coaxially connected to the pressure roller, and the rotating shaft is rotatably connected to the side wall of the annular cover, the secondary bevel gear is located in the annular cover and connected to the end of the rotating shaft, the main bevel gear is meshed with the secondary bevel gear, and the main bevel gear is fixedly sleeved on the rotating pin, the rotating pin is rotatably connected to the top of the annular cover, the transmission gear is connected to the bottom of the rotating pin, and the outer gear ring is coaxially installed on the top of the turntable, and the outer gear ring is meshed with the transmission gear.

[0009] As a further solution of the present invention: the linkage control mechanism includes an L-shaped rod, a movable ring, a lifting assembly, a blowing assembly and a sensing assembly, a plurality of the L-shaped rods are distributed circumferentially along the movable ring, a guide hole for the L-shaped rod to pass through is provided at the bottom of the cylinder, the end of the L-shaped rod away from the movable ring is connected to the top edge of the wind ring, the movable ring is connected to the turntable through the lifting assembly, the blowing assembly is installed on the tank body, the blowing assembly is used to supply air into the wind ring, the sensing assembly is installed between the movable ring and the cylinder, and the sensing assembly is used to control the blowing assembly to supply air when the wind ring descends.

[0010] As a further solution of the present invention: the lifting assembly includes a reciprocating screw, a moving block and a limit rod, the reciprocating screw is coaxially connected to the turntable, and the top end of the reciprocating screw extends into the movable ring, the limit rod is connected to the bottom of the movable ring, the moving block is threadedly connected to the reciprocating screw, and the moving block is provided with a sliding hole for the limit rod to pass through.

[0011] As a further solution of the present invention: the blowing assembly includes a hose, an air pump and a controller, the air pump is installed on the outside of the tank body, the air outlet end of the air pump is connected to the inner cavity of the air ring through the hose, and a plurality of obliquely arranged blowing holes are provided around the bottom of the air ring.

[0012] As a further solution of the present invention: the sensing component includes a pressure sensor, a spring and a T-shaped square tube, the controller is electrically connected to the air pump and the pressure sensor respectively through wires, the T-shaped square tube is fixedly connected to the movable ring, and the T-shaped square tube slides through the top of the cylinder, the spring is sleeved on the outside of the T-shaped square tube, one end of the spring is connected to the top of the movable ring; the other end is connected to the pressure sensor, and the pressure sensor is embedded in the inner upper surface of the cylinder.

[0013] As a further solution of the present invention: a feed inlet and a powder outlet are respectively provided on the top and the bottom of the tank body, and a support frame is installed on the outer side of the tank body.

[0014] The present invention also provides a blast furnace granulated slag powder production line, comprising the above-mentioned fine grinding device.

[0015] Beneficial effects of the present invention: 1. In the present invention, the granulated blast furnace slag powder added into the tank body is automatically introduced into the space between the air ring and the annular cover by means of the material discharge piece and the concave material guide plate, the turntable is driven to rotate by the driving mechanism, and the roller pressing mechanism is driven during the rotation to grind the slag powder between the air ring and the annular cover. After the grinding set time, the air ring can be automatically lifted by the linkage control mechanism, so that the ground material is thrown onto the screen plate under the action of the centrifugal force of the turntable and flows along its surface. During the flow process, the finely ground qualified slag powder can automatically pass through the screen plate for separation and collection, thereby not only facilitating the rapid separation of the finely ground qualified slag powder, but also avoiding the over-grinding of the qualified slag powder as much as possible.

[0016] 2. In the present invention, the top of the air ring can be fitted with the bottom of the discharge piece by lifting it, so that the un-finely ground slag cannot enter between the air ring and the annular cover, and the slag will not be continuously discharged, thereby effectively preventing the slag from affecting the finely ground slag powder.

[0017] 3. In the present invention, the linkage control mechanism can also be used to control the air ring to blow air when it descends. The blown air can be used to blow the slag that fails to pass through the screen plate to the middle area between the air ring and the annular cover. This not only facilitates the subsequent fine grinding of this part of the slag, but also avoids the slag from gathering under the air ring and being unable to fit closely with the turntable. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] Figure 1 is a three-dimensional diagram of a fine grinding device of the present invention; Figure 2 It is a cutaway perspective view of a fine grinding device of the present invention; Figure 3 It is a three-dimensional diagram of the first state of the connection part between the air ring and the processing mechanism in a fine grinding device of the present invention; Figure 4 It is a stereoscopic diagram of the second state of the connection part between the air ring and the processing mechanism in a fine grinding device of the present invention; Figure 5 It is a partial stereoscopic diagram of a fine grinding device of the present invention after the lower material is removed; Figure 6 It is an exploded view of a rotating disk and a driving mechanism in a fine grinding device of the present invention; Figure 7 It is a stereoscopic diagram of the connection part between the roller pressing mechanism and the annular cover in a fine grinding device of the present invention; Figure 8 It is a stereoscopic diagram of the connection part between the air ring and the annular cover in a fine grinding device of the present invention; Fig. 9 It is a stereoscopic diagram of the connection part between the blowing assembly and the air ring in a fine grinding device of the present invention; Fig.10 It is a stereoscopic diagram of the connection part between the induction component and the movable ring in a fine grinding device of the present invention.

[0020] In the figure: 1, tank body; 2, guide plate; 3, sieve plate; 4, turntable; 5, air ring; 51, air blowing hole; 6, annular cover; 7, processing mechanism; 71, unloading piece; 711, cylinder body; 712, splitter cover; 713, second connecting rod; 714, support rod; 72, driving mechanism; 721, convex ring; 722, fixed cylinder; 723, motor; 724, first connecting rod; 73, rolling mechanism; 731, rotating shaft; 732, pressing roller; 733, main bevel gear; 734, auxiliary bevel gear; 735, rotating pin ; 736, transmission gear; 737, outer gear ring; 74, linkage control mechanism; 741, L-shaped rod; 742, movable ring; 743, lifting assembly; 7431, reciprocating screw; 7432, moving block; 7433, limit rod; 744, blowing assembly; 7441, hose; 7442, air pump; 7443, controller; 745, sensing assembly; 7451, pressure sensor; 7452, spring; 7453, T-shaped square tube; 8, feed inlet; 9, powder outlet; 10, support frame. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] like Figure 1-Figure 10 As shown, the present invention is a fine grinding device, comprising a tank body 1, in which a concave guide plate 2 and a sieve plate 3 are installed in sequence from top to bottom, a turntable 4 is installed at the center of the sieve plate 3, a hollow air ring 5 is fitted at the top edge of the turntable 4, an annular cover 6 fitted with the turntable 4 is provided in the air ring 5, and a processing mechanism 7 is provided between the annular cover 6 and the air ring 5; the processing mechanism 7 comprises a feeding piece 71, a driving mechanism 72, a rolling mechanism 73 and a linkage control mechanism 74, the feeding piece 71 and the driving mechanism 72 are both installed in the tank body 1, and the feeding piece 71 is connected to the annular cover 6, the rolling mechanism 73 is installed between the air ring 5 and the annular cover 6, the driving mechanism 72 is used to drive the turntable 4 to rotate, and when the turntable 4 rotates, the blast furnace granulated slag is ground through the rolling mechanism 73, and the linkage control mechanism 74 is arranged in the feeding piece 71, and the linkage control mechanism 74 is used to control the lifting and lowering of the air ring 5, and blow air when the air ring 5 descends.

[0023] It should be noted that, when in use, the granulated blast furnace slag entering the tank body 1 can be automatically filled into the area between the air ring 5 and the annular cover 6 under the cooperation of the feeding piece 71 and the guide plate 2, and the driving mechanism 72 is started to drive the turntable 4 to rotate. During the rotation of the turntable 4, the roller pressing mechanism 73 can be linked to operate, so as to facilitate the fine grinding of the slag. After the fine grinding setting time, the rotating turntable 4 cooperates with the linkage control mechanism 74 to lift the air ring 5, so that a gap is formed between the air ring 5 and the turntable 4. The centrifugal force generated by the rotation of the turntable 4 can throw the finely ground material onto the screen plate 3 and flow along its surface. During the flow process, the finely ground qualified slag powder can automatically pass through the screen plate 3 and be collected at the bottom of the tank body 1, while the unqualified slag rolls back onto the turntable 4; After the air ring 5 is lifted up, its top can fit with the bottom of the discharge piece 71, so that the unfinely ground slag will not be able to enter between the air ring 5 and the annular cover 6, so that the slag in the tank body 1 will not be continuously discharged, which can effectively prevent the slag from affecting the finely ground slag powder. When the linkage control mechanism 74 drives the air ring 5 to descend and reset, its bottom can also be blown. The blown wind can blow the unqualified slag to the middle area between the air ring 5 and the annular cover 6, which is convenient for subsequent grinding. At the same time, it can prevent the slag from gathering under the air ring 5 and causing it to be unable to fit closely with the turntable 4.

[0024] like Figure 2-Figure 5 As shown, the unloading part 71 includes a cylinder 711, a diverter hood 712, a second connecting rod 713 and a support rod 714. The bottom of the cylinder 711 can cover the air ring 5, and an annular opening is opened at the bottom of the cylinder 711. The diverter hood 712 is a conical structure, and the diverter hood 712 is connected to the top of the cylinder 711. The cylinder 711 is connected to the inner wall of the tank body 1 through multiple second connecting rods 713, and the bottom of the cylinder 711 is connected to the top of the annular hood 6 through several support rods 714.

[0025] It should be noted that the conical structure of the diverter hood 712 allows the fallen slag to roll evenly along its surface onto the guide plate 2, and then automatically roll through the guide plate 2 to between the air ring 5 and the annular hood 6 for fine grinding. The cross-section of the second connecting rod 713 in this embodiment is a triangular structure, so that the fallen slag will not remain on the second connecting rod 713.

[0026] like Figure 2 and Figure 6 As shown, the driving mechanism 72 includes a convex ring 721, a fixed cylinder 722, a motor 723 and a first connecting rod 724. The convex ring 721 is coaxially connected to the bottom of the turntable 4, and the convex ring 721 is rotatably connected to the fixed cylinder 722 through a bearing. The motor 723 is installed on the inner lower surface of the fixed cylinder 722, and the output shaft of the motor 723 is coaxially connected to the turntable 4. The fixed cylinder 722 is connected to the inner wall of the tank body 1 through multiple first connecting rods 724.

[0027] It should be noted that the cross-section of the first connecting rod 724 in this embodiment is also a triangular structure, so that the slag powder passing through the screen plate 3 is not easily retained on the first connecting rod 724 when falling. The starting motor 723 is convenient for driving the turntable 4 to rotate, and the convex ring 721 and the bearing can ensure the rotation stability of the turntable 4.

[0028] like Figure 2 and Figure 7 As shown, the rolling mechanism 73 includes a pressure roller 732 with a rotating shaft 731, a main bevel gear 733, a secondary bevel gear 734, a rotating pin 735, a transmission gear 736 and an outer gear ring 737. Multiple pressure rollers 732 are circumferentially arranged between the air ring 5 and the annular cover 6. The rotating shaft 731 is coaxially connected with the pressure roller 732, and the rotating shaft 731 is rotatably connected to the side wall of the annular cover 6. The secondary bevel gear 734 is located in the annular cover 6 and connected to the end of the rotating shaft 731. The main bevel gear 733 is meshed with the secondary bevel gear 734, and the main bevel gear 733 is fixedly sleeved on the rotating pin 735. The rotating pin 735 is rotatably connected to the top of the annular cover 6, the transmission gear 736 is connected to the bottom of the rotating pin 735, and the outer gear ring 737 is coaxially installed on the top of the turntable 4, and the outer gear ring 737 is meshed with the transmission gear 736.

[0029] It should be noted that when the turntable 4 rotates, it drives the outer gear ring 737 to rotate synchronously, while the circumferentially distributed transmission gear 736 does not revolve. Therefore, the transmission gear 736 connected to the rotating pin 735 can be used to rotate synchronously with the outer gear ring 737. When the rotating pin 735 rotates, it drives the main bevel gear 733 to move synchronously, thereby driving the rotating shaft 731 connected to the secondary bevel gear 734 to rotate, and then realizing the rotation of the pressure roller 732. In conjunction with the rotating turntable 4, the slag between the air ring 5 and the annular cover 6 can be fully finely ground.

[0030] like Figure 2 , Figure 5 and Fig. 9 As shown, the linkage control mechanism 74 includes an L-shaped rod 741, a movable ring 742, a lifting assembly 743, a blowing assembly 744 and a sensing assembly 745. Multiple L-shaped rods 741 are distributed circumferentially along the movable ring 742. A guide hole for the L-shaped rod 741 to pass through is provided at the bottom of the cylinder 711. The end of the L-shaped rod 741 away from the movable ring 742 is connected to the top edge of the wind ring 5. The movable ring 742 is connected to the turntable 4 through the lifting assembly 743. The blowing assembly 744 is installed on the tank body 1. The blowing assembly 744 is used to supply air to the wind ring 5. The sensing assembly 745 is installed between the movable ring 742 and the cylinder 711. The sensing assembly 745 is used to control the blowing assembly 744 to supply air when the wind ring 5 descends.

[0031] It should be noted that the rotating turntable 4 is used as the power source of the lifting component 743. The lifting component 743 can generate an upward thrust on the movable ring 742, and cooperate with the L-shaped rod 741 to drive the wind ring 5 to rise. Since the slag accumulated under the wind ring 5 needs to be blown away when it descends, it is necessary to ensure that the wind ring 5 blows when it descends (no blowing in other states). The present application uses the sensing component 745 to facilitate pressure sensing, and the detected pressure fluctuations can be used to determine whether the wind ring 5 is in a descending state, thereby facilitating precise control of the operation of the blowing component 744.

[0032] like Figure 5 and Figure 8 As shown, the lifting assembly 743 includes a reciprocating screw rod 7431, a moving block 7432 and a limiting rod 7433. The reciprocating screw rod 7431 is coaxially connected to the turntable 4, and the top end of the reciprocating screw rod 7431 extends into the movable ring 742. The limiting rod 7433 is connected to the bottom of the movable ring 742. The moving block 7432 is threadedly connected to the reciprocating screw rod 7431, and a sliding hole is provided on the moving block 7432 for the limiting rod 7433 to pass through.

[0033] It should be noted that a through hole is provided at the top center of the annular cover 6 for the reciprocating screw 7431 to pass through. When the turntable 4 rotates, the reciprocating screw 7431 is driven to rotate synchronously. The limit rod 7433 is used to limit the rotational freedom of the movable block 7432, so that the reciprocating screw 7431 can drive the movable block 7432 to reciprocate and rise and fall when rotating. When the movable block 7432 rises and contacts with the movable ring 742, the wind ring 5 will be lifted up as the movable block 7432 continues to rise. This design allows the slag between the wind ring 5 and the annular cover 6 to have enough time for fine grinding. After sufficient fine grinding, the wind ring 5 can be lifted up, which can improve the separation efficiency of the slag powder.

[0034] like Figure 1 , Figure 5 and Fig.10 As shown, the sensing component 745 includes a pressure sensor 7451, a spring 7452 and a T-shaped square tube 7453. The controller 7443 is electrically connected to the air pump 7442 and the pressure sensor 7451 through wires, respectively. The T-shaped square tube 7453 is fixedly connected to the movable ring 742, and the T-shaped square tube 7453 slides through the top of the cylinder 711. The spring 7452 is sleeved on the outside of the T-shaped square tube 7453. One end of the spring 7452 is connected to the top of the movable ring 742; the other end is connected to the pressure sensor 7451, and the pressure sensor 7451 is embedded in the inner upper surface of the cylinder 711.

[0035] It should be noted that in this embodiment, a rectangular opening for inserting the T-shaped square tube 7453 is provided at the center of the movable ring 742. The inner cross-section of the T-shaped square tube 7453 is larger than the cross-section of the reciprocating screw rod 7431, ensuring that the top of the reciprocating screw rod 7431 can extend into the T-shaped square tube 7453. In addition, the top of the T-shaped square tube 7453 is kept in contact with the top of the cylinder 711. This design allows the spring 7452 to always be in a power storage state. The spring 7452 in the power storage state is convenient for applying downward pressure to the air ring 5. When the moving block 7432 pushes up the movable ring 742, the movable ring 742 is pressed downward by the spring 7452. When the ring 7452 is moved, the spring 7452 will be further compressed, so the pressure value detected by the pressure sensor 7451 will gradually increase. When the moving block 7432 moves downward, the air ring 5 will drop and reset. At this time, the spring 7452 will also gradually recover, causing the pressure value detected by the pressure sensor 7451 to gradually decrease. After the spring 7452 is completely reset, the detected pressure value remains unchanged. Therefore, when the pressure sensor 7451 detects that the pressure value is decreasing, the air pump 7442 is controlled to run. When the pressure value is detected to be unchanged, the air pump 7442 is controlled to be turned off.

[0036] like Figure 1 and Fig. 9 As shown, the blowing assembly 744 includes a hose 7441, an air pump 7442 and a controller 7443. The air pump 7442 is installed on the outside of the tank body 1. The air outlet end of the air pump 7442 is connected to the inner cavity of the air ring 5 through the hose 7441, and a plurality of obliquely arranged blowing holes 51 are provided around the bottom of the air ring 5.

[0037] It should be noted that the controller 7443 is used to conveniently control the start and stop of the air pump 7442. When the air pump 7442 is in operation, the gas is sent into the air ring 5 through the hose 7441, and then the gas is blown out through the plurality of blowing holes 51 at the bottom thereof. In this embodiment, the airflow direction of the blowing holes 51 when the air is discharged is close to the inner side of the air ring 5, so as to facilitate the blowing of the slag gathered below to the air ring 5 and the annular cover 6 (such as Figure 8 shown).

[0038] like Figure 1-Figure 2 As shown, a feed port 8 and a powder outlet 9 are respectively provided at the top and the bottom of the tank body 1 , and a support frame 10 is installed on the outside of the tank body 1 .

[0039] It should be noted that the feed port 8 is used to conveniently add the slag to be finely ground into the tank body 1, the powder outlet 9 is opened to conveniently discharge the finely ground qualified slag powder for use, and the support frame 10 is used to conveniently stably support the tank body 1.

[0040] The present application also provides a blast furnace granulated slag powder production line, comprising the above-mentioned fine grinding device.

[0041] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. A fine grinding device, comprising a tank (1), characterized in that: The tank body (1) is provided with a concave material guide plate (2) and a sieve plate (3) in sequence from top to bottom; a rotating disk (4) is provided at the center of the sieve plate (3); a hollow air ring (5) is provided at the top edge of the rotating disk (4); an annular cover (6) is provided in the air ring (5) and is in contact with the rotating disk (4); a processing mechanism (7) is provided between the annular cover (6) and the air ring (5); the processing mechanism (7) comprises a material discharge member (71), a driving mechanism (72), a rolling mechanism (73) and a linkage control mechanism (74); the material discharge member (71) is provided with a material discharge member (72); a material discharge member (73) is provided with a material discharge member (73); a material discharge member (74) is provided with a material discharge member (74); a material discharge member (71) is provided with a material discharge member (71); a material discharge member (72) is provided with a material discharge member (73); a material discharge member (74) is provided with a material discharge member (74); a material discharge member (71) is provided with a material discharge member (71); a material discharge member (74) is provided with a material discharge member (74 ... The tank body (1) comprises a rotating member (71) and a driving mechanism (72), both of which are installed in the tank body (1), and the feeding member (71) is connected to the annular cover (6), and the rolling mechanism (73) is installed between the air ring (5) and the annular cover (6). The driving mechanism (72) is used to drive the turntable (4) to rotate, and when the turntable (4) rotates, the blast furnace granulated slag is ground through the rolling mechanism (73). The linkage control mechanism (74) is arranged in the feeding member (71), and the linkage control mechanism (74) is used to control the lifting and lowering of the air ring (5), and to blow air when the air ring (5) is lowered.

2. A fine grinding device according to claim 1, characterized in that: The unloading member (71) comprises a cylinder (711), a flow divider cover (712), a second connecting rod (713) and a supporting rod (714); the bottom of the cylinder (711) can cover the air ring (5), and the bottom of the cylinder (711) is provided with an annular opening; the flow divider cover (712) is a conical structure, and the flow divider cover (712) is connected to the top of the cylinder (711); the cylinder (711) is connected to the inner wall of the tank body (1) via a plurality of second connecting rods (713), and the bottom of the cylinder (711) is connected to the top of the annular cover (6) via a plurality of supporting rods (714).

3. A fine grinding device according to claim 1, characterized in that: The driving mechanism (72) comprises a convex ring (721), a fixed cylinder (722), a motor (723) and a first connecting rod (724); the convex ring (721) is coaxially connected to the bottom of the rotating disk (4), and the convex ring (721) is rotatably connected to the fixed cylinder (722) via a bearing; the motor (723) is mounted on the inner lower surface of the fixed cylinder (722), and the output shaft of the motor (723) is coaxially connected to the rotating disk (4); and the fixed cylinder (722) is connected to the inner wall of the tank body (1) via a plurality of first connecting rods (724).

4. A fine grinding device according to claim 1, characterized in that: The rolling mechanism (73) comprises a pressure roller (732) with a rotating shaft (731), a main bevel gear (733), a secondary bevel gear (734), a rotating pin (735), a transmission gear (736), and an outer gear ring (737); a plurality of pressure rollers (732) are circumferentially arranged between the air ring (5) and the annular cover (6); the rotating shaft (731) is coaxially connected to the pressure roller (732); the rotating shaft (731) is rotatably connected to the side wall of the annular cover (6); the secondary bevel gear (734) is located The main bevel gear (733) is in the annular cover (6) and connected to the end of the rotating shaft (731). The main bevel gear (733) is meshed with the secondary bevel gear (734). The main bevel gear (733) is fixedly sleeved on the rotating pin (735). The rotating pin (735) is rotatably connected to the top of the annular cover (6). The transmission gear (736) is connected to the bottom of the rotating pin (735). The outer gear ring (737) is coaxially mounted on the top of the rotating disk (4). The outer gear ring (737) is meshed with the transmission gear (736).

5. A fine grinding device according to claim 2, characterized in that: The linkage control mechanism (74) comprises an L-shaped rod (741), a movable ring (742), a lifting assembly (743), a blowing assembly (744) and a sensing assembly (745). A plurality of L-shaped rods (741) are distributed along the circumference of the movable ring (742). A guide hole for the L-shaped rod (741) to pass through is provided at the bottom of the cylinder (711). One end of the L-shaped rod (741) away from the movable ring (742) is connected to the top edge of the wind ring (5). The movable ring (742) is connected to the turntable (4) via the lifting assembly (743). The blowing assembly (744) is mounted on the tank body (1). The blowing assembly (744) is used to supply air into the wind ring (5). The sensing assembly (745) is mounted between the movable ring (742) and the cylinder (711). The sensing assembly (745) is used to control the blowing assembly (744) to supply air when the wind ring (5) descends.

6. A fine grinding device according to claim 5, characterized in that: The lifting assembly (743) comprises a reciprocating screw rod (7431), a moving block (7432) and a limiting rod (7433); the reciprocating screw rod (7431) is coaxially connected to the rotating disk (4), and the top end of the reciprocating screw rod (7431) extends into the movable ring (742); the limiting rod (7433) is connected to the bottom of the movable ring (742); the moving block (7432) is threadedly sleeved with the reciprocating screw rod (7431), and the moving block (7432) is provided with a sliding hole for the limiting rod (7433) to pass through.

7. A fine grinding device according to claim 5, characterized in that: The blowing assembly (744) comprises a hose (7441), an air pump (7442) and a controller (7443); the air pump (7442) is installed on the outside of the tank body (1); the air outlet of the air pump (7442) is connected to the inner cavity of the air ring (5) through the hose (7441); and a plurality of obliquely arranged blowing holes (51) are provided around the bottom of the air ring (5).

8. A fine grinding device according to claim 7, characterized in that: The sensing component (745) comprises a pressure sensor (7451), a spring (7452) and a T-shaped square tube (7453); the controller (7443) is electrically connected to the air pump (7442) and the pressure sensor (7451) respectively through wires; the T-shaped square tube (7453) is fixedly connected to the movable ring (742), and the T-shaped square tube (7453) is slidably arranged through the top of the cylinder (711); the spring (7452) is sleeved on the outside of the T-shaped square tube (7453); one end of the spring (7452) is connected to the top of the movable ring (742); and the other end is connected to the pressure sensor (7451); the pressure sensor (7451) is embedded and installed on the inner upper surface of the cylinder (711).

9. A fine grinding device according to claim 1, characterized in that: The top and bottom of the tank body (1) are respectively provided with a material feed port (8) and a powder discharge port (9), and a support frame (10) is installed on the outside of the tank body (1).

10. A blast furnace granulated slag powder production line, characterized in that: A fine grinding device comprising the fine grinding device according to any one of claims 1 to 9.

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