CN108745510B

CN108745510B - Vertical ball mill

Info

Publication number: CN108745510B
Application number: CN201810652597.6A
Authority: CN
Inventors: 李德祥; 赵玉会; 曹国锋; 朱宽平; 王玉荣
Original assignee: Nanjing Xipu International Engineering Co ltd
Current assignee: Nanjing Xipu International Engineering Co ltd
Priority date: 2018-06-22
Filing date: 2018-06-22
Publication date: 2023-09-29
Anticipated expiration: 2038-06-22
Also published as: CN108745510A

Abstract

The invention discloses an vertical ball mill which comprises a mill foundation, a static part, a driving part, a first grinding body, a second grinding body, a power mechanism, a blanking part and a feeding cover plate. The static part is arranged on the mill base, and the inner side wall of the static part is provided with a long rod-shaped push-up club and a long rod-shaped push-down club. The speed reducer is arranged on the mill base, the input end of the speed reducer is connected with the motor, and the output end of the speed reducer is connected with the driving piece. The driving piece is arranged at the center part of the static piece, and an upper driving plate and a lower driving plate are arranged on the outer side wall of the driving piece. An upper grinding cavity and a lower grinding cavity are formed between the inner side wall of the static part and the outer side wall of the driving part. The first grinding body is arranged in the upper grinding cavity, and the second grinding body is arranged in the lower grinding cavity. The blanking piece is arranged at the bottom of the static piece and used for blanking and sealing the lower grinding cavity, and the feeding cover plate is arranged at the top of the static piece and used for feeding and sealing the upper grinding cavity. The motor drives the driving piece to rotate, and the driving piece drives the grinding body to grind the feeding. The invention has high grinding efficiency and excellent performance. Greatly saves electricity for grinding and improves the production capacity of the grinding machine.

Description

Vertical ball mill

Technical Field

The invention relates to solid material grinding equipment, in particular to an vertical ball mill.

Background

The ball mill is widely used for grinding solid materials such as cement, slag, nonmetallic ore and the like. The traditional ball mill is horizontal, and comprises a round cylinder body which is arranged on a supporting bearing, a motor rotates the ball mill through a gear arranged on the cylinder body, a grinding medium and ground ore are arranged in the cylinder body, when the cylinder body rotates around a horizontal axis according to a specified rotating speed, the grinding medium and the ore in the cylinder body are lifted to a certain height by a cylinder liner plate under the action of centrifugal force and friction force, and then are separated from the cylinder wall to freely fall down or throw down, so that the ore is crushed by the impact and grinding actions. Ore is continuously fed from the hollow shaft neck at one end of the cylinder, and the ground product is continuously discharged through the hollow shaft neck at the other end of the cylinder, and the movement of the ore in the cylinder is realized by using the pressure of the ore continuously fed. Since the height to which the grinding media is lifted is limited, the kinetic energy available to the media is limited, and thus the impact and grinding action capabilities generated are limited.

In summary, the conventional horizontal ball mill has low grinding efficiency and poor grinding performance.

Disclosure of Invention

In order to solve the technical problems, the invention provides an vertical ball mill, which can effectively improve the grinding performance and grinding efficiency of the ball mill.

The technical scheme adopted by the invention is as follows:

an attritor mill comprising:

a mill base for supporting the entire ball mill;

the static part comprises a conical first side wall, the first side wall encloses a cavity with an upward large end, the outer peripheral surface of the upper end of the first side wall protrudes outwards in the radial direction to form a cover plate mounting part, the outer peripheral surface of the middle part of the first side wall protrudes outwards in the radial direction to form a basic mounting part, a plurality of upward pushing rods and downward pushing rods which are arranged at intervals are arranged on the inner peripheral surface of the first side wall in the radial direction, the upward pushing rods are detachable, and a blanking part mounting part is arranged at the bottom end of the first side wall; the static part is arranged on the mill foundation through the foundation connecting surface;

the driving piece comprises a conical second side wall, the second side wall encloses an installation and maintenance cavity with an upward small end, the outer peripheral surface of the second side wall radially protrudes outwards to form an annular upper driving plate, the upper driving plate divides the second side wall into an upper part and a lower part, the upper part is an upper driving wall, the lower part is a lower driving wall, the outer peripheral surface of the lower end of the second side wall radially protrudes outwards to form an annular lower driving plate, the lower driving plate is detachable, the upper driving plate and the lower driving plate are both provided with blanking slots, and the inner peripheral surface of the lower end of the second side wall radially protrudes inwards to form a speed reducer installation part; the driving piece is arranged at the center part of the static piece, an upper grinding cavity is formed by the upper driving wall and the first side wall, a lower grinding cavity is formed by the lower driving wall and the first side wall, the upper pushing club is positioned in the upper grinding cavity, and the lower pushing club is positioned in the lower grinding cavity;

the first grinding body is arranged in the upper grinding cavity;

the second grinding body is arranged in the lower grinding cavity;

the speed reducer and the motor are fixedly arranged on the mill base, the input end of the speed reducer is connected with the motor, and the output end of the speed reducer is connected with the speed reducer mounting part of the driving piece.

The blanking piece comprises a circular blanking cavity surrounded by an inner side wall, an outer side wall and a bottom wall, and a circular connecting part is arranged at the upper end of the outer side wall; an exhaust pipe and a blanking pipe are arranged in the blanking cavity; the blanking piece is arranged on the blanking piece installation part of the static piece through the connecting part of the blanking piece, the outer wall of the blanking piece is in friction and rotation fit with the side wall of the driving piece, and the blanking cavity is communicated with the lower grinding cavity;

the feeding cover plate is provided with a feeding port and a feed back port, is arranged on the cover plate mounting part of the static piece and is used for sealing the upper grinding cavity.

In order to improve the grinding effect and the grinding performance, the upper push rod and the lower push rod are preferably arranged radially, the cross sections of the upper push rod and the lower push rod are trapezoidal, and inclined push spherical surfaces are respectively arranged, and face the rotating direction of the grinding body.

In order to facilitate the disassembly and assembly, the push-up cue is preferably connected into a whole by a push rod mounting part, and the push-up cue is detachably mounted in the static piece through the push rod mounting part.

In order to improve the grinding effect and the grinding performance, the blanking slits are radially arranged.

For discharging cleanly, the bottom wall of the blanking member is preferably provided with a downward inclined surface, the blanking pipe is square, and the inner wall of the blanking pipe is flush with the inner side surface of the inclined surface of the bottom wall.

In order to prevent the clogging, the feed port and the return port are preferably provided obliquely upward.

For convenient maintenance, preferably the center part of the feeding cover plate is provided with an maintenance hole which is communicated with the installation maintenance cavity.

For dustproof and rust-proof, preferably the ball mill further comprises an access cover plate, wherein the access cover plate is mounted on the access opening through bolts and used for sealing the access opening.

In order to improve the grinding effect and the grinding performance, the outer dimension of the first grinding body is preferably larger than the outer dimension of the second grinding body.

The working principle of the invention is as follows:

the driving piece rotates under the drive of motor, and the grinding body is circular motion under the effect of driving wall and driving plate, and the grinding body motion speed that is close to driving wall and driving plate is faster, and the grinding body operation speed that keeps away from driving wall and driving plate is slower, because the grinding body that keeps away from driving wall and driving plate is close to the lateral wall of static piece, and the lateral wall of static piece has hindered the motion of grinding body. Therefore, the grinding body generates shearing force in the radial direction of the grinder, and the material is ground strongly. When the grinding body touches the ball pushing plate in the moving process, the ball pushing plate gives the grinding body an upward acceleration, the grinding body moving upwards generates an additional grinding effect on the materials, and the grinding performance is further improved.

The materials are fed into the upper grinding cavity through the feed inlet and the return material inlet, and preliminary grinding is carried out under the action of the first grinding body. The material after primary grinding falls into the lower grinding cavity through the blanking seam of the upper driving plate, further grinding is carried out under the action of the second grinding body, and the ground material falls into the lower grinding cavity through the blanking seam of the lower driving plate and is discharged out of the grinding machine through the blanking pipe. The discharged materials are separated by a follow-up powder separator, the finished products are collected, and coarse particles selected by the powder separator are fed into an upper grinding cavity through a return material inlet for grinding again. The air outlet is connected with the negative pressure air exhauster, and exhausts the air leaked into the grinding cavity, so that positive pressure is prevented from being generated in the grinding cavity, the falling speed of the material can be pushed in the process that the air is pumped out, and the flow and grinding of the material in the grinding machine are promoted.

The invention has the beneficial effects that: compared with the prior art, the vertical ball mill has high grinding efficiency and excellent grinding performance, can effectively reduce the unit power consumption of material grinding, improves the grinding capacity of the ball mill, and improves the unit yield of the ball mill.

Drawings

Fig. 1 is a schematic perspective view of a ball mill according to an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view of fig. 1.

Fig. 3 is a schematic perspective view of the mill base of fig. 1.

Fig. 4 is a schematic perspective view of the static member of fig. 1.

Fig. 5 is a schematic cross-sectional structure of fig. 4.

Fig. 6 is a partial enlarged view at a in fig. 5.

Fig. 7 is a schematic cross-sectional view of the putter of fig. 4.

Fig. 8 is a schematic perspective view of the driving member of fig. 1.

Fig. 9 is a schematic cross-sectional structure of fig. 7.

Fig. 10 is a schematic perspective view of the blanking member of fig. 1.

Fig. 11 is a schematic cross-sectional structure of fig. 10.

Fig. 12 is a schematic perspective view of the feed deck of fig. 1.

Fig. 13 is a schematic perspective view of the access panel of fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solution of the present invention will be clearly and completely described with reference to the accompanying drawings and a preferred embodiment.

In the following description, the ball mill shown in fig. 1 is referred to as an orientation, and the upper part of the ball mill is shown as "upper" in the figure, and the lower part is shown as "lower" in the opposite direction; the direction pointing to the interior of the ball mill is "inside", and vice versa is "outside".

Referring to fig. 1 and 2, an attritor mill, comprising: mill base 1, static piece 2, driving piece 3, first grinding body 4, second grinding body 5, power unit 6, unloading piece 7, feeding apron 8 and access cover 9.

Referring to fig. 3, in this embodiment, the mill base 1 is made of concrete and includes a base 11 and a support 12, and the base 11 and the support 12 may be integrally formed or secondarily cast. The base 11 is rectangular and horizontally arranged. The support 12 is cylindrical, and has four legs 121 at its lower end, the legs 121 being supported on the base 11. The upper end of support is equipped with ring shape installation department 13, all is equipped with a plurality of rag bolt mounting holes 131 on the installation department 13. The size of the mill foundation and the number of the anchor bolt mounting holes are determined according to the weight and the production capacity of the ball mill.

Referring to fig. 4 to 7, in the present embodiment, the static member 2 includes a conical first side wall 21, and the first side wall 21 encloses a cavity 211 with a large end facing upwards. The outer peripheral surface of the upper end of the first side wall protrudes radially outwards to form a circular cover plate mounting part 22, and a plurality of bolt mounting holes 221 are uniformly formed in the cover plate mounting part 22. The outer peripheral surface of the middle part of the first side wall protrudes outwards radially to form a circular base installation part 23, bolt installation holes 231 are uniformly formed in the base installation part 23, and the bolt installation holes 231 correspond to the foundation bolt installation holes 131 one by one. A plurality of push-up clubs 24 and push-down clubs 25 are radially arranged on the inner peripheral surface of the first side wall at intervals. In this embodiment, 8 push-up clubs 24 and 8 push-down clubs 25 are each arranged radially. The push-up cue 24 and the push-down cue 25 are long rod-shaped, the cross section of which is trapezoidal, and the inclined planes of the trapezium are push-up spheres. Referring to fig. 5, fig. 5 is a schematic cross-sectional view of a putter 24, where ramp 241 is the ball-pushing surface of the putter. The putter 24 is integrally coupled to the annular first putter attachment portion 241. The inner peripheral surface of the first side wall 21 radially protrudes inwards to form an annular second push rod mounting part 27, the second push rod mounting part 27 and the first push rod mounting part 241 are provided with overlapped connecting parts, step through holes are formed in the connecting parts of the first push rod mounting part 241, threaded holes are formed in the connecting parts of the second push rod mounting part 27, a set screw 28 penetrates through the step through holes of the first push rod mounting part 241 to be fastened in the threaded holes of the second push rod mounting part 27, and the set screw 28 fastens and mounts the push-up cue 24 on the first side wall 21. The screw is designed to facilitate the disassembly of the push rod. The bottom of first lateral wall 21 is equipped with axially extending unloading spare installation department 26, evenly axially is equipped with a plurality of screw mounting holes 261 on the unloading spare installation department 26, and screw mounting hole 261 is the screw counter bore. The lower part of the first side wall 21 is provided with a grinding body inlet 212, and the grinding body inlet 212 is provided with a cover plate.

The static part 2 is installed in the following manner: the foundation bolts are penetrated in the foundation bolt mounting holes 131 of the mill foundation 1, the foundation mounting part 23 of the static part is placed on the support 12, the upper ends of the foundation bolts penetrate through the bolt mounting holes 231, nuts are sleeved on the foundation bolts for locking after calibration, and then the static part 2 of the mill foundation is firmly fixed on the mill foundation by pouring concrete in the foundation bolt mounting holes 131.

Referring to fig. 8 and 9, in this embodiment, the driving member 3 includes a conical second side wall 31 which encloses an upwardly facing mounting cavity 311. The outer peripheral surface of the second side wall protrudes radially outwards to form an annular upper driving plate 32, and a plurality of blanking slits 321 are formed in the upper driving plate in a radial mode. The number of the discharge slits 321 and the opening area are designed according to the production capacity of the ball mill. The upper driving plate divides the second side wall into an upper portion and a lower portion, the upper portion is an upper driving wall 311, and the lower portion is a lower driving wall 312. The outer peripheral surface of the lower end of the second side wall protrudes radially outwards to form an annular lower driving plate 33, and a plurality of blanking slits 331 are formed in the lower driving plate in a radial mode. The number of the discharge slits 331 and the opening area are designed according to the throughput of the ball mill. The lower driving plate 33 is designed to be detachable, and the connection manner of the lower driving plate 33 and the driving piece 3 is the same as the connection manner of the push-up cue 24 and the static piece 2. The inner peripheral surface of the lower end of the second side wall protrudes radially inwards to form an annular speed reducer mounting part 34, a plurality of bolt mounting holes 341 are uniformly formed in the speed reducer mounting part 34, and the bolt mounting holes 341 correspond to flange holes of the output end of the speed reducer 6 one by one. The end face of the bottom end of the second side wall protrudes downwards axially to form a cylindrical blanking member connecting portion 35.

The structural relation between the driving piece 3 and the static piece 2 is as follows: the driving member 3 is disposed at the center of the static member 2, the upper driving wall 311 and the first side wall 21 form an upper grinding chamber 101, the lower driving wall 312 and the first side wall 21 form a lower grinding chamber 102, the push-up cue 24 is disposed in the upper grinding chamber 101, and the push-down cue 25 is disposed in the lower grinding chamber 102. The grinding body inlet 212 communicates with the lower grinding chamber 102.

The power mechanism 6 comprises a speed reducer and a motor, wherein the base of the speed reducer is fixed on the base 11 of the mill foundation in a connection mode by adopting expansion screws or foundation screws, and the input end of the speed reducer is connected with the motor.

The driving member 3 is mounted in the following manner: the driver 3 is fixed to the output end of the speed reducer by inserting a bolt into the bolt mounting hole 341 of the speed reducer mounting portion 34.

The first grinding body 4 is placed in the upper grinding chamber 101 and the second grinding body 5 is placed in the lower grinding chamber 102. In this embodiment, the first polishing body 4 and the second polishing body 5 are both spherical, and the spherical diameter of the first polishing body 4 is larger than that of the second polishing body 5.

Referring to fig. 10 and 11, in the present embodiment, the blanking member 7 is symmetrically designed, and includes a blanking cavity 103 surrounded by a circular inner sidewall 71, a circular outer sidewall 72 and a bottom wall 73. The bottom wall 73 is formed by two inclined planes 731 inclined downwards, the intersection line of the two inclined planes 731 being at the centre of the blanking member. The two discharging pipes 76 are symmetrically arranged along the inclined plane 731, and the inner walls of the two discharging pipes are flush with the inner side surface of the inclined plane 731. The two exhaust pipes 75 are horizontally and symmetrically arranged, and the exhaust pipes 75 are positioned above the blanking pipe 76. The outer peripheral surface of the upper end of the outer side wall 72 radially protrudes outwards to form an annular connecting portion 74, a plurality of bolt mounting holes 741 are uniformly formed in the connecting portion 74, and the bolt mounting holes 741 are stepped through holes and correspond to the screw mounting holes 261 one by one.

The mounting mode of the blanking piece 7 is as follows: the connecting bolts are fastened in the screw mounting holes 261 of the stationary member 2 through the bolt mounting holes 741 of the blanking member 7. The head of the connecting bolt abuts against the stepped surface of the bolt installation hole 741. The outer side wall 72 of the blanking member is in friction and rotation fit with the blanking member connecting portion 35 of the driving member 3, and the blanking cavity 103 is communicated with the lower grinding cavity 102.

Referring to fig. 12, in this embodiment, the feeding cover 8 is a circular plate, and the upper surface of the plate is provided with reinforcing ribs. An access panel mounting hole 81 is formed in the center portion of the cover panel mounting hole 81, a plurality of bolt mounting holes 811 are uniformly formed in the periphery of the access panel mounting hole 81, and the bolt mounting holes 811 are threaded holes. The outer fringe portion of feeding apron is equipped with feeding apron installation department 84, evenly has offered a plurality of bolt mounting holes 841 on the feeding apron installation department 84, and bolt mounting hole 841 corresponds with the bolt mounting hole 221 of static piece 2 one by one. The feeding cover plate 8 is provided with a feeding port 82 and a return port 83, and the feeding port 82 and the return port 83 are a section of pipeline and are obliquely upwards arranged.

The mounting mode of the feeding cover plate 8 is as follows: the connection bolt passes through the bolt mounting hole 841 and the bolt mounting hole 221, and is fastened by a nut. The lower side of the feeding cover plate 8 is in friction rotation connection with the upper end surface of the driving piece 3.

Referring to fig. 13, in this embodiment, the access cover 9 is a circular flat plate, the center portion of the upper side surface of the access cover is provided with a lifting handle 92, the outer edge portion of the access cover is provided with an access cover mounting portion 91, a plurality of bolt mounting holes 911 are uniformly formed in the access cover mounting portion 91, and the bolt mounting holes 911 are stepped holes and correspond to the bolt mounting holes 811 one by one.

The mounting mode of the access cover plate 9 is as follows: the connecting bolt is fastened in the bolt mounting hole 811 through the bolt mounting hole 911, and the head of the bolt abuts against the stepped surface of the bolt mounting hole 911.

The working mode of the invention is as follows:

referring to fig. 2, the material is fed into the upper grinding chamber 101 through the feed 82 and the return 83, and is primarily ground under the action of the first grinding body 4 with larger external dimensions. The material after preliminary grinding falls into the grinding cavity 102 through the blanking slit 321, and is further ground under the action of the second grinding body 5 with smaller external dimension. The further ground material falls through the discharge slot 331 into the discharge chamber 103 and exits the mill through the discharge port 76. The discharged materials are separated by a follow-up powder selector, the finished products are collected, and coarse particles selected by the powder selector are fed into the upper grinding cavity 101 through the feed back port 83 for grinding again.

Parts of the above description not specifically described are either prior art or may be implemented by prior art.

Claims

1. An attritor mill, comprising:

a mill base for supporting the entire ball mill;

the first grinding body is arranged in the upper grinding cavity;

the second grinding body is arranged in the lower grinding cavity;

the base of the speed reducer is fixedly arranged on the mill base, the input end of the speed reducer is connected with the motor, and the output end of the speed reducer is connected with the speed reducer mounting part of the driving piece;

the feeding cover plate is provided with a feeding port and a feed back port, is arranged on the cover plate mounting part of the static piece and is used for sealing the upper grinding cavity;

the upper pushing club and the lower pushing club are radially arranged, the cross sections of the upper pushing rod and the lower pushing rod are trapezoid, and inclined pushing sphere faces are arranged and face the rotating direction of the grinding body;

the blanking slits are radially arranged; the diapire of unloading spare is equipped with the inclined plane of downward sloping, and the unloading pipe is square, and the inner wall of unloading pipe and the medial surface parallel and level of diapire inclined plane.

2. A ball mill according to claim 1, wherein the push-up cue is integrally joined by a cue mounting portion, the push-up cue being removably mounted in the static member by its cue mounting portion.

3. A ball mill according to claim 1, wherein the feed inlet and return inlet are disposed obliquely upward.

4. A ball mill according to claim 1, wherein the central portion of the feed cover plate is provided with an access opening which communicates with the installation access chamber.

5. The ball mill of claim 4, further comprising an access panel mounted to the access opening by bolts for closing the access opening.

6. The ball mill of claim 1, wherein the first grinding body has a larger overall dimension than the second grinding body.