Ball mill for grinding water-quenched slag of iron separation raw material

Abstract

The ball mill is mainly characterized in that a motor shaft of a driving motor is in lap joint with a belt, the end, away from the driving motor, of the belt is in lap joint with an outer barrel, a main barrel is placed in the outer barrel, and two access holes are formed in the peripheral surface of the main barrel; a feeding pipe and a discharging pipe are placed at the two ends of the main cylinder, a feeding screw is placed in the feeding pipe, a lining plate is placed in the main cylinder, a bin partition plate is placed on one side of the lining plate, and the end, away from the lining plate, of the bin partition plate is connected with a bent pipe cleaning device in a sleeved mode. The steel ball cleaning device has the advantages that the bristles on the inner wall surface of the bent pipe sweep the surfaces of the steel balls, and dust adhering to the surfaces of the steel balls is removed.

Description

Technical Field

[0001] This utility model relates to the field of ball mill technology, specifically to a ball mill for grinding water-quenched slag from iron raw materials. Background Technology

[0002] Water-quenched slag is short for water-quenched alkaline ferrometallurgical slag. It is a granular slag with a rough and porous surface, light and brittle texture, and easy to break. After being rapidly cooled with water, it becomes granulated and foamy. After being ground to a certain fineness by grinding equipment, it is screened by magnetic separation to remove ferromagnetic impurities from the mixture. It is then added as a mineral powder admixture to cement and concrete to enhance the strength of cement and concrete.

[0003] Most ball mills on the market generate heat when grinding water-quenched slag. The steel balls inside the ball mill generate heat due to their collisions. Since the inside of the ball mill is in a closed state, the heat generated during continuous operation becomes high temperature. Prolonged high temperature causes a large amount of fine powder to stick to the surface of the steel balls inside the ball mill, which requires stopping the machine to cool down, remove the internal steel balls, clean them, and then continue working. This reduces production efficiency and consumes a lot of manpower and resources. Utility Model Content

[0004] This application proposes a ball mill for grinding water-quenched slag used in iron ore selection. When the steel balls in the first chamber of the main cylinder are rotating and positioned in the lower half of the main cylinder's rotation, they roll into the inlet pipe. The rotation of the main cylinder drives the inlet pipe to rotate, changing its position so that it rotates to the upper half of the main cylinder's rotation. The steel balls inside the inlet pipe pass through the bend of the bend due to gravity, and finally exit from the outlet pipe. As the steel balls pass through the bend, the bristles on the inner wall of the bend brush the surface of the steel balls, removing the dust adhering to the surface. This addresses the problem of a large amount of fine powder adhering to the surface of the steel balls inside the ball mill due to prolonged high temperatures.

[0005] To achieve the above objectives, this application adopts the following technical solution: A ball mill for grinding water-quenched slag from iron raw materials, comprising: a funnel, a drive motor, a main cylinder, and a bent pipe cleaning device, characterized in that: a belt is connected to the motor shaft of the drive motor, an outer cylinder is connected to the end of the belt away from the drive motor, the main cylinder is placed inside the outer cylinder, two sets of inspection ports are provided on the outer circumferential surface of the main cylinder, a feed pipe and a discharge pipe are placed at both ends of the main cylinder, a feed screw is placed inside the feed pipe, an inner liner is placed inside the main cylinder, a partition plate is placed on one side of the inner liner, a bent pipe cleaning device is sleeved at the end of the partition plate away from the inner liner, a return screw blade is installed on the inner circumferential wall of the main cylinder near the bent pipe cleaning device, a dust collector is fixedly installed at the upper end of the discharge pipe, and a dust collection box is installed on the dust collector through a conveying pipe;

[0006] The curved pipe cleaning device includes a curved pipe, an elliptical groove, bristles, and oblique limiting blocks. The curved pipe is shaped like a semi-circular tube. A ball inlet pipe and a ball outlet pipe are fixedly installed at both ends of the curved pipe, respectively. Rubber rings are installed on the circumference of the ball inlet pipe and the ball outlet pipe. A limiting ring is installed on one side of the rubber ring. A support frame is installed on the outer circumference of the limiting ring. Oblique limiting blocks are installed on the inner walls of the curved pipe, the ball inlet pipe, and the ball outlet pipe. An elliptical groove is opened on the outer circumference of the curved pipe, and bristles are installed on the inner circumference of the curved pipe.

[0007] Furthermore, a funnel is fixedly installed at the upper end of the feed pipe, and a fixed frame is fixedly installed near the top of the feed pipe close to the funnel. The feed screw consists of screw blades and a rotating shaft. A central hole is provided on the top surface of the feed pipe near the fixed frame. The rotating shaft of the feed screw passes through the central hole of the feed pipe. The rotating shaft of the feed screw is connected to a feed drive motor via gears. The screw blades of the feed screw are placed inside the feed pipe. A cylindrical cover is installed at the end of the feed pipe away from the funnel. A bearing ring is installed on the outer circumferential surface where the feed pipe and the cylindrical cover overlap. A sealing ring is fixedly installed at the end of the feed pipe close to the bearing ring. A bearing bracket is fixedly installed on the outer circumferential surface of the bearing ring. A fixing ring is bolted to the side of the cylindrical cover away from the feed pipe. A set of fixed frame, bearing ring, bearing bracket, cylindrical cover, and fixing ring are each provided at one end of the discharge pipe.

[0008] Furthermore, the inner part of the fixing ring is welded to the top of both sides of the main cylinder, and sound insulation cotton is attached to the outer circumference of the main cylinder. The outer cylinder is fixedly installed on the outer circumference of the sound insulation cotton.

[0009] Furthermore, a partition plate is placed inside the main cylinder. The surface of the partition plate is provided with multiple through slots and multiple round holes of different sizes. Multiple connecting blocks are provided on one side of the partition plate. The number of partition plates is set to multiple sets. The partition plates are connected by the connecting blocks so that multiple sets of partition plates are spliced ​​together to form a disc with a diameter smaller than the inner diameter of the main cylinder. The round holes of different sizes of the partition plate are fitted with curved pipe cleaning devices.

[0010] Furthermore, the side of the main cylinder closest to the feed pipe is the first chamber, and the side of the main cylinder closest to the discharge pipe is the second chamber. The circumferential wall of the first chamber of the main cylinder is equipped with an inner lining plate, and the circumferential wall of the second chamber of the main cylinder is equipped with a return spiral blade. The rotation of the main cylinder drives the return spiral blade to rotate, which pushes the material through the through slot on the partition plate back to the first chamber of the main cylinder. The end of the second chamber of the main cylinder away from the partition plate is equipped with a finished product disc screen, and the diameter of the finished product disc screen is smaller than the inner circumferential diameter of the second chamber of the main cylinder.

[0011] Furthermore, the middle section of the bend is set as a straight pipe, and the two ends of the bend, which connect to the ball inlet pipe and the ball outlet pipe respectively, are set as bent pipes.

[0012] Furthermore, the bending pipe cleaning device is provided in multiple sets, and the internal diameter of the multiple sets of bending pipe cleaning devices is set to different sizes. The ball inlet pipe of the bending pipe cleaning device is sleeved in a round hole located away from the axis of the partition plate, and the ball outlet pipe of the bending pipe cleaning device is sleeved in a round hole located close to the axis of the partition plate.

[0013] This utility model has the following beneficial effects:

[0014] 1. The ball mill for grinding water-quenched slag in iron ore selection provided in this application involves the steel balls in the first chamber of the main cylinder rotating to the lower half-circle position of the main cylinder. The steel balls roll into the pipe of the ball inlet pipe in the bend cleaning device. The rotation of the main cylinder drives the ball inlet pipe to rotate, changing the position of the ball inlet pipe so that it rotates to the upper half-circle position of the main cylinder. The steel balls inside the ball inlet pipe pass through the bend of the bend pipe by gravity, and finally the steel balls come out from the outlet pipe. When passing through the bend pipe, the bristles on the inner wall of the bend pipe brush the surface of the steel balls, realizing the effect of removing dust adhering to the surface of the steel balls due to high temperature by the bristles in the bend cleaning device.

[0015] 2. The ball mill for grinding water-quenched slag from iron raw materials provided in this application reduces the noise generated by the collision of steel balls during operation by attaching multiple sets of sound insulation cotton to the outer circumferential surface of the main cylinder and fitting the outer cylinder to the outer circumferential surface of the entire sound insulation cotton.

[0016] 3. The ball mill for grinding water-quenched slag, a raw material for iron ore selection, provides a method for collecting dust generated by the suction force of the dust collector. This dust, stirred up by the collision of steel balls inside the main cylinder, is collected in the dust collection box via the discharge pipe and the conveying pipe of the dust collector. While the dust collector draws out the dust, it also removes air from inside the main cylinder. Fresh air is then introduced by the feed screw conveying the material to be ground. The spiral blades of the feed screw prevent the dust stirred up in the first chamber of the main cylinder from leaking out, ensuring air circulation between the two chambers inside the main cylinder. This air circulation reduces the large amount of heat generated inside the main cylinder during the collision of steel balls, reducing the adhesion of dust to the inner wall of the liner and the surface of the steel balls, thereby improving the continuous grinding effect of the steel balls. Attached Figure Description

[0017] The accompanying drawings, which form part of this specification, illustrate embodiments disclosed in this application and, together with the specification, serve to explain the principles disclosed in this application.

[0018] This disclosure will become clearer with reference to the accompanying drawings and the following detailed description, wherein:

[0019] Figure 1 This is the main view of this application;

[0020] Figure 2 This is a partial sectional view of this application;

[0021] Figure 3 This is a side view of this application;

[0022] Figure 4 for Figure 3 Sectional view at point A;

[0023] Figure 5 for Figure 4 Enlarged view of point G;

[0024] Figure 6 for Figure 4 Enlarged view of point B;

[0025] Figure 7 for Figure 1 Sectional view at point C;

[0026] Figure 8 for Figure 7 Enlarged view of point D;

[0027] Figure 9 This is a schematic diagram of the overall pipe cleaning device;

[0028] Figure 10 for Figure 9 Enlarged view of point E;

[0029] Figure 11 This is a partial schematic diagram of the pipe cleaning device.

[0030] Figure 12 for Figure 11 Sectional view at point F;

[0031] Figure 13 This is a side view of the obliquely defined block.

[0032] In the diagram: 1. Funnel; 101. Feed pipe; 1011. Sealing ring; 102. Fixing frame; 103. Bearing ring; 104. Bearing bracket; 105. Cylinder cover; 106. Feeding screw; 107. Dust collector; 108. Dust collection box; 2. Drive motor; 201. Belt; 202. Discharge pipe; 203. Feeding drive motor; 3. Main cylinder; 31. Fixing ring; 301. Sound insulation cotton; 302. Outer cylinder; 303, Inspection port; 304, Inner liner; 305, Divider plate; 3051, Connecting block; 306, Return spiral blade; 307, Finished product disc screen; 4, Bending pipe cleaning device; 401, Bending pipe; 4011, Inlet pipe; 4012, Outlet pipe; 402, Elliptical groove; 403, Brush bristles; 404, Inclined limiting block; 405, Rubber ring; 406, Limiting ring; 407, Support frame. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0034] Example 1

[0035] Please see the appendix Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 Appendix Figure 7 A ball mill for grinding water-quenched slag from iron ore raw materials includes a funnel 1, a drive motor 2, a main cylinder 3, and a curved pipe cleaning device 4. A feed pipe 101 is fixedly installed below the funnel 1. A fixing frame 102 is fixedly installed on the feed pipe 101 near the top of the funnel 1. A cylinder cover 105 is movably connected to the end of the feed pipe 101 away from the funnel 1. The cylinder cover 105 is formed by welding a pipe with the same diameter as the feed pipe 101 onto a hollow circular plate. A feed screw 106 is placed inside the pipe of the feed pipe 101 and the cylinder cover 105 and the hollow circular plate of the cylinder cover 105. The feed screw 106 consists of screw blades and a rotating shaft. A central hole is provided on the top surface of the end of the feed pipe 101 near the fixing frame 102. The rotating shaft of the feed screw 106 passes through the central hole of the feed pipe 101. A gear is installed at one end of the feed pipe 101. The rotating shaft of the feed screw 106 is connected to the feed drive motor 203 through the gear. When the drive motor 203 starts, it drives the feed screw 106 to rotate through the gear. The gap between the spiral blades of the feed screw 106 and the inner circumferential surface of the feed pipe 101 is small to avoid material backflow inside the main cylinder 3. A bearing ring 103 is installed at the outer circumferential surface where the feed pipe 101 overlaps with the pipe of the cylinder cover 105. The bearing ring 103 is divided into an inner bearing ring and an outer bearing ring. A steel ball is sandwiched between the inner and outer bearing rings of the bearing ring 103. A sealing ring 1011 is fixedly installed on the outer circumferential surface where the feed pipe 101 fits into the bearing ring 103. The pipe of the cylinder cover 105 is fixedly installed on the inner circumferential wall of the inner bearing ring of the bearing ring 103, while the feed pipe 101 is movably fitted onto the inner circumferential wall of the inner bearing ring of the bearing ring 103.

[0036] When the main cylinder 3 rotates, the pipe of the cylinder cover 105 drives the inner bearing ring of the bearing ring 103 to rotate. The feed pipe 101 does not rotate inside the inner bearing ring of the bearing ring 103. The use of the sealing ring 1011 prevents material from overflowing from the gap between the feed pipe 101 and the bearing ring 103. The bearing bracket 104 is fixedly installed on the outer circumferential surface of the outer bearing ring of the bearing ring 103.

[0037] A fixing ring 31 is bolted to the hollow ring plate of the cylinder cover 105 on the side away from the bearing ring 103. The main cylinder 3 is welded to the inner ring of the fixing ring 31. Sound insulation cotton 301 is attached to the outer circumference of the main cylinder 3. An outer cylinder 302 is fixedly installed on the outer circumference of the sound insulation cotton 301. A belt 201 is attached to one side of the outer cylinder 302. A drive motor 2 is attached to the end of the belt 201 away from the outer cylinder 302. When the motor shaft at the front end of the drive motor 2 is running, it drives the outer cylinder 302 and the main cylinder 3 to rotate through the series of belts 201. A discharge pipe 202 is provided at the end of the main cylinder 3 away from the funnel 1. A dust collector 107 is fixedly installed at the upper end of the discharge pipe 202. The dust collector 107 is used to extract the ground powdery material by suction. A dust collection box 108 is installed on one side of the dust collector 107 through a conveying pipe. A set of fixing frame 102, bearing frame 104, cylinder cover 105, and fixing ring 31 are each provided at the same position at one end of the discharge pipe 202.

[0038] The main cylinder 3 is equipped with a partition plate 305. The surface of the partition plate 305 has multiple through slots and multiple round holes of varying sizes. The through slots of the partition plate 305 are used to allow the flow of ground dust. Multiple sets of partition plates 305 are provided; the figures in this application show eight sets. Multiple connecting blocks 3051 are installed on one side of each partition plate 305. These connecting blocks 3051 connect the eight sets of partition plates 305, forming a disc. The diameter of the disc is smaller than the inner diameter of the main cylinder 3. The disc of the partition plate 305 divides the interior of the main cylinder 3 into two chambers. The main body 3 has two chambers: the first chamber is located near the feed pipe 101, and the second chamber is located near the discharge pipe 202. The second chamber of the main body 3 near the discharge pipe 202 is fitted with a finished product disc screen 307. The first chamber of the main body 3 is fitted with an inner lining plate 304. The inner lining plate 304 is made of multiple alumina blocks attached to the inner circumference of the first chamber of the main body 3. Multiple steel balls of different diameters are placed on the surface of the inner lining plate 304. The inner lining plate 304 is used to reduce the impact of the steel balls rotating and falling, thus protecting the main body 3 from deformation.

[0039] The working principle of the specific implementation method is as follows: The material to be ground enters the inside of the feed pipe 101 through the funnel 1 and falls onto the spiral blades of the feed screw 106. Driven by the feed drive motor 203, the feed screw 106 is rotated and the feed screw 106 pushes the material to the first chamber of the main cylinder 3 to mix with the steel balls.

[0040] Drive motor 2 starts, driving the outer cylinder 302 and the main cylinder 3 to rotate via belt 201. This causes the steel balls and materials in the first chamber of the main cylinder 3 to tumble. The drive power of drive motor 2 is controlled to ensure the rotation speed of the main cylinder 3 reaches a suitable level. The steel balls in the first chamber of the main cylinder 3 rotate to the upper half of the main cylinder 3 and fall due to gravity. The impact of the falling steel balls crushes and grinds the materials remaining in the lower half of the main cylinder 3. The impact of the falling steel balls achieves fine grinding. The dust is stirred up and flows through the through slot of the partition plate 305 into the second chamber of the main cylinder 3. The suction generated by the operation of the dust collector 107 draws the ground dust material inside the first chamber of the main cylinder 3. The dust material flows through the through slot of the partition plate 305 and into the second chamber of the main cylinder 3. It is then filtered by the finished product disc screen 307 and collected inside the dust collection box 108 through the discharge pipe 202 and the conveying pipe of the dust collector 107.

[0041] The collision of steel balls in the first chamber of the main cylinder 3 generates heat, causing fine grinding powder to adhere to the surface of the steel balls and the inner lining plate 304, affecting the fineness of subsequent grinding. While the dust collector 107 generates suction to extract dust, it also removes the air inside the main cylinder 3. Fresh air is then introduced when the material to be ground is conveyed by the feeding screw 106. By setting a small gap between the spiral blades of the feeding screw 106 and the inner circumference of the feeding pipe 101, the spiral blades of the feeding screw 106 prevent the dust raised in the first chamber of the main cylinder 3 from leaking out, ensuring air circulation between the two chambers inside the main cylinder 3. This solves the problem of a large amount of heat generated inside the main cylinder 3 during the collision of steel balls, causing dust to adhere to the steel balls and the inner wall of the inner lining plate 304, thus affecting the grinding efficiency.

[0042] Sound insulation cotton 301 is affixed and installed on the outer circumferential surface of the main cylinder 3. An outer cylinder 302 is fitted onto the outer side of the sound insulation cotton 301. Two sets of inspection ports 303 are installed at the two sets of compartments of the main cylinder 3. The steel balls will generate noise when they collide with each other during operation. By affixing multiple sets of sound insulation cotton 301 to the outer circumferential surface of the main cylinder 3 and fitting the outer cylinder 302 onto the entire outer circumferential surface of the sound insulation cotton 301, the noise generated by the collision of the steel balls is reduced, thus achieving the function of reducing noise during operation.

[0043] Example 2

[0044] Please see the appendix Figure 1 Appendix Figure 2 Appendix Figure 3 Appendix Figure 4 Appendix Figure 5 Appendix Figure 6 Appendix Figure 7 Appendix Figure 8 Appendix Figure 9 Appendix Figure 10 Appendix Figure 11 Appendix Figure 12 Appendix Figure 13 Compared with Embodiment 1, in this application, a return spiral blade 306 is installed on the circumferential surface of the second chamber of the main cylinder 3. A bent pipe cleaning device 4 is placed on the side of the partition plate 305 near the second chamber of the main cylinder 3. The bent pipe cleaning device 4 includes a bent pipe 401, an elliptical groove 402, bristles 403, and an inclined limiting block 404. The number of bent pipe cleaning devices 4 is set to multiple sets, and the bent pipe cleaning devices 4 are set to small diameter bent pipe cleaning devices 4 and large diameter bent pipe cleaning devices 4, which are used to clean steel balls of different diameters. A ball inlet pipe 4011 and a ball outlet pipe 4012 are fixedly installed at both ends of the bent pipe 401, respectively. A rubber ring 405 is movably sleeved on the surface of the ball inlet pipe 4011 and the ball outlet pipe 4012. A rubber ring 405 is fixedly installed on one side of the rubber ring 405. The limiting ring 406, the bend 401, the ball inlet pipe 4011, and the ball outlet pipe 4012 are fixedly installed with multiple sets of inclined limiting blocks 404 at intervals on the inner wall of the pipe. The outer circumferential surface of the bend 401 is provided with multiple sets of elliptical grooves 402. The elliptical grooves 402 are used for dust circulation inside the bend 401 to avoid excessive dust accumulation. The inner wall of the bend 401 is provided with multiple sets of bristles 403. The outer circumferential surface of the rubber ring 405 is provided with a support frame 407. The large and small round holes of the partition plate 305 are set as a first set of round holes close to the axis of the partition plate 305 and a second set of round holes away from the axis of the partition plate 305. The ball inlet pipe 4011 is sleeved in the second set of round holes away from the axis of the partition plate 305, and the ball outlet pipe 4012 is sleeved in the first set of round holes close to the axis of the partition plate 305.

[0045] The working principle of the specific implementation method: The dust adhering to the surface of the steel ball can also be removed to a certain extent by using the curved pipe cleaning device 4. When the steel ball in the first chamber of the main cylinder 3 is rotated to the lower half-circle position of the main cylinder 3, the steel ball rolls into the inside of the inlet pipe 4011. The rotation of the main cylinder 3 drives the partition plate 305 and the curved pipe 401 to rotate, so that the position of the inlet pipe 4011 rotates from the lower half-circle position of the main cylinder 3 to the upper half-circle position of the main cylinder 3. The steel ball in the inlet pipe 4011 creates a drop by changing the position of the inlet pipe 4011 from bottom to top. The steel ball passes through the bend of the curved pipe 401 by gravity. The steel ball falls from the outlet pipe 4012 above the steel ball in the first chamber of the main cylinder 3. During the process of the steel ball passing through the inside of the curved pipe 401, the bristles 403 on the inner wall of the curved pipe 401 sweep and brush the surface of the steel ball to remove the dust adhering to the surface of the steel ball.

[0046] The inclined limiting block 404 is configured with a ramp on one side and a vertical surface on the other. The steel ball enters the inlet tube 4011 and slides along the ramp of the inclined limiting block 404 towards the outlet tube 4012. When the steel ball rotates and slides, it encounters resistance from the vertical surface of the inclined limiting block 404, preventing it from moving back. Two different sizes of curved tube cleaning devices 4 clean steel balls of different diameters. For example, if a small steel ball enters a large-diameter curved tube cleaning device 4, the smaller steel ball is propelled towards the outlet tube 4012 by the steel ball continuing to enter the large-diameter curved tube cleaning device 4, preventing the small steel ball from becoming stuck inside the large-diameter curved tube cleaning device 4. The brush bristles 403 sweep away dust from the surface of the steel balls and discharge them through the space of the elliptical groove 402 into the interior of the bent tube 401. Larger particles fall to the bottom of the second chamber of the main cylinder 3 due to gravity. The rotation of the main cylinder 3 drives the return spiral blade 306 to rotate, causing the large particles at the bottom of the second chamber of the main cylinder 3 to return to the first chamber of the main cylinder 3 for further grinding. This solves the problem that during the process of the return spiral blade 306 carrying the steel balls through the bent tube cleaning device 4, large particles are carried into the second chamber of the main cylinder 3, preventing them from being ground further. As the steel balls pass through the bent tube 401, the brush bristles 403 sweep away the dust on their surface, ensuring that the fineness of the material grinding is not affected during long-term operation of the ball mill. This also solves the problem of a large amount of fine powder adhering to the surface of the steel balls inside the ball mill due to prolonged high temperatures, saving manpower and resources.

[0047] In addition, a partition plate 305 and a curved pipe cleaning device 4 can be added according to the actual usage requirements of the length of the first compartment of the main cylinder 3. The purpose is to solve the problem of steel balls at the front and middle positions of the first compartment of the main cylinder 3, which cannot be cleaned by rotating to the position of the curved pipe cleaning device 4. An additional set of partition plate 305 and curved pipe cleaning device 4 is set in the middle position of the first compartment of the main cylinder 3. A perforated steel plate protective cover is set at the rear end of the curved pipe 401 on the added curved pipe cleaning device 4, so that the curved pipe 401 is sandwiched between the partition plate 305 and the perforated steel plate protective cover. The use of the perforated steel plate protective cover avoids the impact of steel balls on the curved pipe 401.

[0048] By adding a set of partition plates 305 and a curved pipe cleaning device 4, the original two chambers of the main cylinder 3 are divided into three chambers. The first chamber is used for coarse grinding. The material ground in the first chamber is drawn into the second chamber by the suction of the dust collector 107. The second chamber is used for finer grinding. This achieves graded grinding of materials under the same rotational force, resulting in a finer finished product. The added set of curved pipe cleaning device 4 cleans the steel balls at the front and middle positions of the first chamber of the main cylinder 3, preventing excessive dust from sticking to the steel balls at the front and middle positions, thereby improving the grinding quality.

Claims

1. A ball mill for grinding water-quenched slag from iron ore raw materials, comprising: The funnel (1), drive motor (2), main cylinder (3), and curved pipe cleaning device (4) are characterized in that: the motor shaft of the drive motor (2) is connected to a belt (201), and the end of the belt (201) away from the drive motor (2) is connected to an outer cylinder (302). The main cylinder (3) is placed inside the outer cylinder (302). Two sets of inspection ports (303) are provided on the outer circumference of the main cylinder (3). A feed pipe (101) and a discharge pipe (202) are placed at both ends of the main cylinder (3). The inside of the feed pipe (101) is... A feeding screw (106) is placed inside the main cylinder (3), and an inner liner (304) is placed inside the main cylinder (3). A partition plate (305) is placed on one side of the inner liner (304). A bent pipe cleaning device (4) is sleeved on the end of the partition plate (305) away from the inner liner (304). A return screw blade (306) is installed on the inner peripheral wall of the main cylinder (3) near the bent pipe cleaning device (4). A dust collector (107) is fixedly installed at the upper end of the discharge pipe (202). A dust collection box (108) is installed on the dust collector (107) through the conveying pipe. The curved pipe cleaning device (4) includes a curved pipe (401), an elliptical groove (402), bristles (403), and an inclined limiting block (404). The curved pipe (401) is shaped as a semi-circular pipe. A ball inlet pipe (4011) and a ball outlet pipe (4012) are fixedly installed at both ends of the curved pipe (401). A rubber ring (405) is installed on the circumferential surface of the ball inlet pipe (4011) and the ball outlet pipe (4012). A limiting ring (406) is installed on one side of the rubber ring (405). A support frame (407) is installed on the outer circumferential surface of the limiting ring (406). An inclined limiting block (404) is installed on the inner wall of the curved pipe (401), the ball inlet pipe (4011), and the ball outlet pipe (4012). An elliptical groove (402) is opened on the outer circumferential surface of the curved pipe (401). Bristles (403) are installed on the inner circumferential wall of the curved pipe (401).

2. The ball mill for grinding water-quenched slag from iron ore raw materials according to claim 1, characterized in that: A funnel (1) is fixedly installed at the upper end of the feed pipe (101). A fixing frame (102) is fixedly installed near the top of the feed pipe (101) close to the funnel (1). The feed screw (106) consists of a screw blade and a rotating shaft. A central hole is provided on the top surface of the feed pipe (101) near the fixing frame (102). The rotating shaft of the feed screw (106) passes through the central hole of the feed pipe (101). The rotating shaft of the feed screw (106) is connected to a feed drive motor (203) via gears. The screw blades of the feed screw (106) are placed inside the feed pipe (101). The feed pipe (101) is located away from the funnel (1). A cylindrical cover (105) is installed at the end of the feed pipe (101) overlapping with the cylindrical cover (105). A bearing ring (103) is installed on the outer circumferential surface of the feed pipe (101) overlapping with the cylindrical cover (105). A sealing ring (1011) is fixedly installed at the end of the feed pipe (101) near the bearing ring (103). A bearing bracket (104) is fixedly installed on the outer circumferential surface of the bearing ring (103). A fixing ring (31) is bolted to the side of the cylindrical cover (105) away from the feed pipe (101). A set of fixing bracket (102), bearing ring (103), bearing bracket (104), cylindrical cover (105), and fixing ring (31) are each provided at one end of the discharge pipe (202).

3. The ball mill for grinding water-quenched slag from iron ore raw materials according to claim 2, characterized in that: The inner side of the fixed ring (31) is welded to the top of both sides of the main cylinder (3). Sound insulation cotton (301) is attached to the outer circumferential surface of the main cylinder (3). The outer cylinder (302) is fixedly installed on the outer circumferential surface of the sound insulation cotton (301).

4. The ball mill for grinding water-quenched slag from iron ore raw materials according to claim 3, characterized in that: The main cylinder (3) has a partition plate (305) inside. The surface of the partition plate (305) is provided with multiple through slots and multiple holes of different sizes. Multiple connecting blocks (3051) are provided on one side of the partition plate (305). The number of partition plates (305) is set to multiple sets. The partition plates (305) are connected by connecting blocks (3051) so that multiple sets of partition plates (305) are spliced ​​into a disc with a diameter smaller than the inner circle of the main cylinder (3). The holes of the partition plate (305) are fitted with bent pipe cleaning devices (4).

5. The ball mill for grinding water-quenched slag from iron ore raw materials according to claim 4, characterized in that: The inside of the main cylinder (3) near the feed pipe (101) is the first chamber, and the inside of the main cylinder (3) near the discharge pipe (202) is the second chamber. The circumferential wall of the first chamber of the main cylinder (3) is equipped with an inner lining plate (304), and the circumferential wall of the second chamber of the main cylinder (3) is equipped with a return spiral blade (306). The rotation of the main cylinder (3) drives the return spiral blade (306) to rotate, so that the return spiral blade (306) rotates and pushes the material through the through slot on the partition plate (305) back to the first chamber of the main cylinder (3). The end of the second chamber of the main cylinder (3) away from the partition plate (305) is provided with a finished product disc screen (307). The diameter of the finished product disc screen (307) is smaller than the inner circumferential diameter of the second chamber of the main cylinder (3).

6. The ball mill for grinding water-quenched slag from iron ore raw materials according to claim 1, characterized in that: The middle part of the bend (401) is set as a straight pipe, and the two ends of the bend (401) are respectively connected to the ball inlet pipe (4011) and the ball outlet pipe (4012) as bent pipes.

7. The ball mill for grinding water-quenched slag from iron ore raw materials according to claim 5, characterized in that: The bending pipe cleaning device (4) is provided in multiple sets, and the internal diameter of the multiple sets of bending pipe cleaning devices (4) is set to different sizes. The ball inlet pipe (4011) in the bending pipe cleaning device (4) is sleeved on the round hole at the position away from the axis of the partition plate (305), and the ball outlet pipe (4012) in the bending pipe cleaning device (4) is sleeved on the round hole at the position close to the axis of the partition plate (305).

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