CN111346711A

CN111346711A - Intermediate discharge ball mill

Info

Publication number: CN111346711A
Application number: CN202010258575.9A
Authority: CN
Inventors: 韩楷; 李刚; 周烈; 王泽�; 郝理想; 周纯; 周萍
Original assignee: Jiangsu Pengfei Group Co Ltd
Current assignee: Jiangsu Pengfei Group Co Ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-06-30

Abstract

The application relates to a middle ball mill of unloading includes: the grinding machine comprises a grinding machine barrel, a grinding machine body and a grinding machine, wherein a drying bin, a coarse grinding bin, a discharging bin and a fine grinding bin are sequentially arranged along the axial direction of the grinding machine barrel; the driving device is connected with the mill cylinder and is used for driving the mill cylinder to rotate; the material separation device is arranged in the cylinder body of the grinding machine and is positioned between the drying bin and the coarse grinding bin; the feeding device is arranged on the side, close to the drying bin, of the mill barrel and is communicated with the drying bin, the feeding device is used for feeding initial materials to the drying bin, and the initial materials can sequentially enter the rough grinding bin and the discharging bin along with the rotation of the mill barrel after entering the drying bin; the feed back device is arranged on the side, close to the fine grinding bin, of the mill barrel and is communicated with the fine grinding bin; the compartment device is arranged in the discharging bin. This application can be with initial material at first grinding back, screens out with qualified material earlier, and unqualified material is carried back again and is ground in the mill barrel, can avoid the energy loss that repeated grinding caused, improves grinding efficiency and output.

Description

Intermediate discharge ball mill

Technical Field

The application relates to the technical field of powder engineering, in particular to an intermediate discharging ball mill.

Background

In the existing grinding system, a ball mill is a grinding core device in the grinding system, and the grinding of materials is completed in a grinding machine cylinder. When the materials are ground, the materials enter a mill cylinder from the feed end of a ball mill, are ground by a grinding body (steel balls and steel forgings) in a coarse grinding bin, are primarily screened by a screening device in the mill cylinder, are discharged from the discharge end at the tail part of the ball mill, enter a powder concentrator for grading treatment, and qualified fine powder is stored in a finished product warehouse; the unqualified powder returns to the feeding end of the ball mill and enters the cylinder of the mill again for grinding.

In the process of realizing the application, the applicant finds that the diameter of the grinding body is larger in the rough grinding bin of the mill cylinder, the coarse powder of the material returned into the mill cylinder is slightly coarse, the granularity is smaller (after one-time grinding, the granularity is far smaller than the original feeding particle size, and the requirement of qualified powder fineness is not met), the grinding body cannot be ground by the grinding body after entering the rough grinding bin, but a 'material cushion' effect is generated, and the grinding body is mingled with the initial material, so that the grinding body cannot be effectively ground, the grinding efficiency is reduced, and the energy loss of the whole ball mill is increased.

Therefore, there is an urgent need for a ball mill, which separately grinds the unqualified fine powder screened by the initial material and the powder selecting machine, so as to prevent the unqualified fine powder and the initial material from generating a 'material cushion' effect when the powder is ground in the coarse grinding bin, thereby improving the grinding effect and reducing the energy loss of the whole ball mill.

Disclosure of Invention

The embodiment of the application provides a middle ball mill of unloading solves current ball mill and mixes the unqualified farine that initial material and selection powder machine sieve come out simultaneously and grinds in the corase grind storehouse, leads to unqualified farine not only can not ground by the rinding body, produces "material pad" effect scheduling problem on the contrary.

In order to solve the above technical problem, the present application is implemented as follows:

in a first aspect, there is provided an intermediate discharge ball mill for grinding an initial material and an unqualified material, respectively, comprising:

the grinding machine comprises a grinding machine barrel, a grinding machine body and a grinding machine, wherein a drying bin, a coarse grinding bin, a discharging bin and a fine grinding bin are sequentially arranged along the axial direction of the grinding machine barrel;

the driving device is connected with the mill cylinder and is used for driving the mill cylinder to rotate;

the material separation device is arranged in the cylinder body of the grinding machine and is positioned between the drying bin and the coarse grinding bin;

the feeding device is arranged on the side, close to the drying bin, of the mill barrel and is communicated with the drying bin, the feeding device is used for feeding initial materials to the drying bin, and the initial materials can sequentially enter the rough grinding bin and the discharging bin along with the rotation of the mill barrel after entering the drying bin;

the material returning device is arranged on the side, close to the fine grinding bin, of the mill barrel and is communicated with the fine grinding bin, the material returning device is used for feeding unqualified materials to the fine grinding bin, and the unqualified materials can rotate along with the mill barrel after entering the fine grinding bin and enter the discharging bin;

and the compartment device is arranged in the discharging bin and is used for discharging the initial material after the coarse grinding bin is ground and the unqualified material after the fine grinding bin is ground.

In a first possible implementation manner of the first aspect, the material separation device includes:

the compartment bracket is arranged in the mill barrel and positioned between the drying bin and the rough grinding bin, a through hole is formed in the middle of the compartment bracket, and initial materials in the drying bin can enter the rough grinding bin through the through hole;

the blind plate is positioned on the side close to the coarse grinding bin and arranged on the bin separation bracket;

the air distribution plate is positioned on the side close to the drying bin, arranged on the partition bin support and covered on the through hole.

In a second possible implementation manner of the first aspect, the material returning device includes:

the upper end of the feed back cover is provided with a feed inlet, and unqualified materials can enter the feed back cover through the feed inlet;

the transmission connecting pipe penetrates through the feed back cover, is connected with the mill cylinder and is communicated with the fine milling bin, and can be driven to synchronously rotate by the mill cylinder;

the material returning mechanism is arranged on the transmission connecting pipe corresponding to the feeding hole and communicated with the interior of the transmission connecting pipe, and is used for conveying unqualified materials into the transmission connecting pipe;

the transmission connecting pipe lining is arranged on the inner wall of the transmission connecting pipe, and a transmission structure is arranged on the transmission connecting pipe lining and can synchronously rotate along with the transmission connecting pipe so as to feed unqualified materials to the fine grinding bin.

With reference to the second possible implementation manner of the first aspect, in a third possible implementation manner of the first aspect, the material returning mechanism includes:

the plurality of material returning spoons are arranged on the transmission connecting pipe at intervals along the circumferential direction of the transmission connecting pipe and can be driven to synchronously rotate by the transmission connecting pipe, and each material returning spoon is communicated with the inside of the transmission connecting pipe;

wherein, feed back mechanism is in carrying unqualified material to the transmission extension, and unqualified material drops in the feed back spoon when entering into the feed back cover by the feed inlet, enters into the transmission extension along the feed back spoon.

With reference to the second possible implementation manner of the first aspect, in a fourth possible implementation manner of the first aspect, the transmission structure includes:

the spiral blades are arranged on the lining of the transmission connecting pipe at intervals to form a spiral channel, and the spiral channel is used for conveying the unqualified material in the transmission connecting pipe into the cylinder body of the mill;

and the material pouring cone is arranged on the lining of the transmission connecting pipe corresponding to the material returning mechanism and used for guiding unqualified materials conveyed into the transmission connecting pipe by the material returning mechanism into the spiral channel.

In a fifth possible implementation form of the first aspect, the compartment device comprises:

the first grate plate is arranged in the cylinder body of the mill and positioned between the coarse grinding bin and the discharging bin, a first round hole is formed in the middle of the first grate plate, and initial materials ground by the coarse grinding bin can enter the discharging bin through the first grate plate;

the second grate plate is arranged in the cylinder body of the mill and positioned between the fine milling bin and the discharging bin, a second round hole is formed in the middle of the second grate plate, and unqualified materials ground by the fine milling bin can enter the discharging bin through the second grate plate;

one end of the first bracket cage is arranged on the first round hole and is fixedly connected with the first grate plate;

one end of the second bracket cage is arranged on the second round hole and is fixedly connected with the second grate plate;

the clamping plate is arranged between the first grate plate and the second grate plate, the other end of the first support cage is fixedly arranged on the side, close to the first grate plate, of the clamping plate, and the other end of the second support cage is fixedly arranged on the side, close to the second grate plate, of the clamping plate.

With reference to the fifth possible implementation manner of the first aspect, in a sixth possible implementation manner of the first aspect, the compartment device further includes:

the first support is arranged in the cylinder body of the mill and positioned between the coarse grinding bin and the discharging bin, and the first grate plate is fixedly arranged on the first support;

the second support is arranged in the mill cylinder and positioned between the fine grinding bin and the discharging bin, and the second grate plate is fixedly arranged on the second support;

and one end of each supporting steel pipe is fixedly arranged on the first support, and the other end of each supporting steel pipe is fixedly arranged on the second support.

In a seventh possible implementation manner of the first aspect, the driving device includes:

a motor;

the speed reducer is connected with the motor;

one end of the transmission mechanism is connected with the speed reducer, the other end of the transmission mechanism is connected with the mill barrel, and the motor drives the mill barrel to rotate sequentially through the speed reducer and the transmission mechanism.

In an eighth possible implementation manner of the first aspect, the method further includes:

the curved surface stepped lining plate is attached to the inner wall of the mill cylinder;

one end of each pressing device penetrates through the mill cylinder body to be connected to the curved surface stepped lining plate, and the curved surface stepped lining plate is fixed on the inner wall of the mill cylinder body.

With reference to the eighth possible implementation manner of the first aspect, in a ninth possible implementation manner of the first aspect, the pressing device includes:

the grinding door cover and the curved surface stepped lining plate are correspondingly arranged on the grinding machine cylinder body;

the pressing plate is correspondingly attached to the grinding door cover and arranged on the outer wall of the grinding machine cylinder;

the pressing beam is arranged on the pressing plate, and the door grinding cover is positioned in the pressing beam;

and one end of the bolt component is arranged in the curved-surface stepped lining plate, and the other end of the bolt component penetrates through the pressing beam and the grinding door cover and is fixedly connected with the pressing beam and the grinding door cover, so that the curved-surface stepped lining plate is fixed on the inner wall of the mill cylinder.

Compared with the prior art, the application has the advantages that:

the utility model provides an in the middle of ball mill of unloading when the grinding material, initial material passes through feed arrangement and enters into in the mill barrel to in proper order through stoving storehouse stoving, the coarse grinding storehouse grinds the back for the first time, enter into the discharge bin and unload, carry out the classified screening to it, wherein unqualified material passes through the feed back device and enters into again in the mill barrel, grinds the back again through the fine grinding storehouse, enters into the discharge bin and unloads once more, carries out the classified screening once more to it, circulates in proper order. Therefore, the middle ball mill of unloading of this application can be with initial material at the first back of grinding, screens out with qualified material earlier, and unqualified material is carried back mill barrel once more and is internal to be ground, can avoid the energy loss that repeated grinding caused, improves grinding efficiency and output.

Simultaneously, this application is when grinding initial material and unqualified material, and initial material and unqualified material are ground respectively in corase grind storehouse and fine grinding storehouse, can avoid because of grinding the "material pad" phenomenon that produces together it is mingled with. And this application can also add the less rinding body of diameter in the fine grinding storehouse, solves because of the rinding body diameter is great, and unqualified material can not be ground by the rinding body problem.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural view of an intermediate discharge ball mill according to a first embodiment of the present application.

Figure 2 is a schematic structural view of a mill cylinder of a first embodiment of the present application.

Fig. 3 is a schematic structural diagram of a material separation device according to a first embodiment of the present application.

Fig. 4 is a schematic front view of a feeding back device according to a first embodiment of the present application.

Fig. 5 is a schematic side view of the feeding back device according to the first embodiment of the present application.

Fig. 6 is a schematic view of rejected material entering the reclaiming spoon according to the first embodiment of the present application.

Fig. 7 is a schematic view of the rejected material entering the drive connection tube according to the first embodiment of the present application.

Figure 8 is a schematic structural view of a compartment device according to a first embodiment of the present application.

Fig. 9 is a schematic sectional view taken along the direction B-B in fig. 2.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In a first embodiment of the present application, fig. 1 is a schematic structural view of an intermediate discharge ball mill according to a first embodiment of the present application, and fig. 2 is a schematic structural view of a mill cylinder according to the first embodiment of the present application. As shown in fig. 1 and 2, the intermediate discharge ball mill 1 includes a mill barrel 2, a driving device 3, a material separating device 4, a feeding device 5, a material returning device 6 and a bin separating device 7. The utility model provides an intermediate discharge ball mill 1 is when the grinding material, drive arrangement 3 drive mill barrel 2 rotates, initial material passes through feed arrangement and enters into in mill barrel 2, it dries in the storehouse 21 to get into in proper order, get into the first grinding in the corase grind storehouse 22 through spacer 4, then reentrant discharge bin 23 in, unload through spacer 7, carry out the screening in grades to it, wherein unqualified material returns to mill barrel 2 in through feed back device 6, it grinds once more to get into fine grind storehouse 24, then reentrant discharge bin 23 in, unload once more through spacer 7, carry out hierarchical screening once more to it, circulate in proper order.

Consequently the middle ball mill of unloading 1 of this application can be with initial material at the first back of grinding, unloads through unloading silo 23, screens out with qualified material earlier, and unqualified material is carried back again and is ground once more in mill barrel 2 (fine grinding storehouse 24), can avoid the energy loss that repeated grinding caused, improves grinding efficiency and output.

Simultaneously, the middle ball mill of unloading 1 of this application passes through feed back device 6 and carries unqualified material back alone to fine grinding storehouse 24 in, can avoid because of "material pad" phenomenon that grinds the production with initial material and unqualified material mingled together. And this application can also add the less rinding body of diameter in fine grinding storehouse 24, solves because of the rinding body diameter is great, and unqualified material can not be by the problem that the rinding body ground.

The following describes the structure of the mill barrel 2, the drive device 3, the material separation device 4, the feed device 5, the material return device 6, and the bin separation device 7.

Referring to fig. 2 again, the mill cylinder 2 is sequentially provided with a drying bin 21, a rough grinding bin 22, a discharging bin 23 and a fine grinding bin 24 along the axial direction thereof, the material separation device 4 is disposed in the mill cylinder 2 and located between the drying bin 21 and the rough grinding bin 22 for separating the drying bin 21 from the rough grinding bin 22, and the initial material can enter the rough grinding bin 22 for grinding through the material separation device 4 after being dried in the drying bin 21.

Fig. 3 is a schematic structural diagram of a material separation device according to a first embodiment of the present application. As shown in fig. 3, the material separating device 4 disclosed in this embodiment includes a compartment support 41, a blind plate 42 and a wind distribution plate 43, the compartment support 41 is fixedly disposed in the mill cylinder 2 and located between the drying bin 21 and the rough grinding bin 22, the middle of the compartment support 41 has a through hole 411, the blind plate 42 is located near the rough grinding bin 22 and disposed on the compartment support 41, the blind plate 42 is used to separate the drying bin 21 from the rough grinding bin 22, and the raw material in the drying bin 21 can enter the rough grinding bin 22 through the through hole 411. The air distribution plate 43 is located near the drying chamber 21, and is disposed on the compartment support 41 and covered on the through hole 411 to ensure that the initial material can obtain sufficient fluidized air pressure, but the structure of the material separation device 4 is not limited thereto, and those skilled in the art can select other material separation devices 4 with suitable structures according to actual requirements.

Referring again to fig. 1, a driving device 3 is connected to the mill cylinder 2, and the driving device 3 is used for driving the mill cylinder 2 to rotate. The driving device 3 disclosed in this embodiment includes a motor 31, a speed reducer 32 and a transmission mechanism 33, the speed reducer 32 is connected to the motor 31, one end of the transmission mechanism 33 is connected to the speed reducer 32, the other end is connected to the mill barrel 2, and the motor 31 drives the mill barrel 2 to rotate sequentially through the speed reducer 32 and the transmission mechanism 33, but not limited thereto.

Specifically, as shown in fig. 1, the motor 31 is disposed on one side of the material returning device 6 away from the mill cylinder 2, and the output shaft thereof is located on the same straight line with the axis of the mill cylinder 2, the motor 31 is connected with the input shaft of the speed reducer 32, the output shaft of the speed reducer 32 is connected with one end of the transmission mechanism 33, and the other end of the transmission mechanism 33 is connected with the mill cylinder 2 through the material returning device 6 (transmission connecting pipe 62). When the driving device 3 drives the mill cylinder 2 to rotate, the motor 31 outputs a driving force, and the driving force is transmitted through the speed reducer 32 and the transmission mechanism 33 in sequence to drive (the transmission connecting pipe 62 drives) the mill cylinder 2 to rotate, but not limited thereto.

Feed arrangement 5 sets up and is close to stoving storehouse 21 side at mill barrel 2 to with stoving storehouse 21 intercommunication, feed arrangement 5 is used for to the initial charge of stoving storehouse 21 material, and initial charge can rotate along with mill barrel 2 after entering into stoving storehouse 21, enters into coarse grinding storehouse 22 and discharge bin 23 in proper order. There is no particular requirement for the selection of the structure of the feeding device 5 in this embodiment, and it is sufficient to refer to the routine selection of those skilled in the art, for example, the structure of the feeding device 5 may be selected to be a structure consisting of a hopper and its support.

The material returning device 6 is arranged on the side, close to the fine grinding bin 24, of the mill barrel body 2 and communicated with the fine grinding bin 24, the material returning device 6 is used for feeding unqualified materials to the fine grinding bin 24, and the unqualified materials can rotate along with the mill barrel body 2 after entering the fine grinding bin 24 and enter the discharging bin 23. Fig. 4 is a schematic front view of the feeding back device according to the first embodiment of the present application, and fig. 5 is a schematic side view of the feeding back device according to the first embodiment of the present application. As shown in fig. 4 and 5, the material returning device 6 disclosed in this embodiment includes a material returning cover 61, a transmission connection pipe 62, a material returning mechanism 63, and a transmission connection pipe lining 64, wherein the upper end of the material returning cover 61 has a material inlet 611, the unqualified material can enter the material returning cover 61 through the material inlet 611, the transmission connection pipe 62 is inserted into the material returning cover 61, and is connected with the mill cylinder 2 and communicated with the fine milling bin 24, and the transmission connection pipe 62 can be driven by the mill cylinder 2 to rotate synchronously.

The material returning mechanism 63 and the feeding hole 611 are correspondingly arranged on the transmission connecting pipe 62 and are communicated with the inside of the transmission connecting pipe 62, and the material returning mechanism 63 is used for conveying unqualified materials into the transmission connecting pipe 62. Fig. 6 is a schematic diagram of unqualified materials entering the material returning spoon according to the first embodiment of the application, and fig. 7 is a schematic diagram of unqualified materials entering the transmission connecting pipe according to the first embodiment of the application. As shown in fig. 5 to 7, the material returning mechanism 63 further disclosed in this embodiment includes a plurality of material returning scoops 631, the plurality of material returning scoops 631 are disposed on the transmission adapter 62 at intervals along the circumferential direction of the transmission adapter 62, and can be driven by the transmission adapter 62 to rotate synchronously, each material returning scoop 631 is communicated with the transmission adapter 62, when the unqualified material enters the material returning cover 61 through the material inlet 611, the unqualified material can fall into the material returning scoops 631, and enters the transmission adapter 62 along the material returning scoops 631 under the action of gravity, but not limited thereto

As shown in fig. 4, the drive nipple liner 64 is disposed on the inner wall of the drive nipple 62. Preferably, the driving connection lining 64 is embedded on the inner wall of the driving connection 62 to facilitate the removal and replacement thereof, but not limited thereto. The transmission structure 641 is arranged on the transmission connecting pipe lining 64, the transmission structure 641 can rotate synchronously with the transmission connecting pipe 62 to feed the unqualified materials to the fine grinding bin 24, however, the structure of the material returning device 6 is not limited to this, and those skilled in the art can select other material returning devices 6 with suitable structures according to actual requirements.

Specifically, as shown in fig. 5 to 7, the number of the plurality of return scoops 631 is eight, the eight return scoops 631 are uniformly arranged on the transmission adapter 62 at intervals along the circumferential direction of the transmission adapter 62, and the scoop tail of each return scoop 631 is communicated with the inside of the transmission adapter 62. When the transmission adapter 62 rotates, it can drive the eight material return scoops 631 to rotate synchronously. When entering the material returning cover 61 through the material feeding hole 611, the unqualified material will continuously fall under the action of gravity, enter the spoon head which just rotates to the material returning spoon 631 corresponding to the material feeding hole 611, continuously fall to the spoon tail along the material returning spoon 631, and enter the transmission connecting pipe 62.

It should be understood that the above describes the plurality of return scoops 631 by taking the eight return scoops 631 as an example, but the application is not limited thereto, and the number of the return scoops 631 may be other numbers, for example, the number of the return scoops 631 may be six or seven, and the like.

It should be noted that, the structure of the material returning mechanism 63 is described above by taking only eight material returning spoons 631 as an example, but the present application is not limited thereto, and a person skilled in the art may select another suitable structure of the material returning mechanism 63 according to actual requirements.

Referring to fig. 4 and 7 again, the transmission structure 641 further disclosed in this embodiment includes a plurality of spiral blades 6411 and a material pouring cone 6412, the plurality of spiral blades 6411 are disposed on the transmission adapter liner 64 at intervals to form a spiral channel 6413, the spiral channel 6413 is used to transmit the unqualified material in the transmission adapter 62 into the mill barrel 2, the material pouring cone 6412 and the material returning mechanism 63 are disposed on the transmission adapter liner 64 correspondingly, and the material pouring cone 6412 is used to guide the unqualified material transmitted from the material returning mechanism 63 into the transmission adapter 62 into the spiral channel 6413, but not limited thereto. Preferably, the plurality of helical blades 6411 and the material pouring cone 6412 are formed as a single body with the inner liner 64, and are formed as a single injection molding, but not limited thereto.

As shown in fig. 2, the compartment device 7 is disposed in the discharging bin 23, and the compartment device 7 is used for discharging the initial material ground in the rough grinding bin 22 and the unqualified material ground in the fine grinding bin 24. Figure 8 is a schematic structural view of a compartment device according to a first embodiment of the present application. As shown in fig. 8, the compartment device 7 disclosed in this embodiment includes a first grate plate 71, a second grate plate 72, a first rack cage 73, a second rack cage 74, and a clamping plate 75, the first grate plate 71 is disposed in the mill cylinder 2 and located between the rough grinding bin 22 and the discharging bin 23, a first circular hole 711 is disposed in the middle of the first grate plate 71, and the initial material ground in the rough grinding bin 22 can enter the discharging bin 23 through the first grate plate 71 for discharging. The second grate plate 72 is arranged in the mill cylinder 2 and located between the fine grinding bin 24 and the discharging bin 23, a second round hole 721 is formed in the middle of the second grate plate 72, and unqualified materials ground by the fine grinding bin 24 can enter the discharging bin 23 through the second grate plate 72 to be discharged again.

One end of the first bracket cage 73 is arranged on the first round hole 711, and is fixedly connected with the first grate plate 71, and the grinding body with the larger inner diameter in the rough grinding bin 22 can enter the discharging bin 23 through the first bracket cage 73, so that the grinding body with the larger inner diameter is discharged to replace the grinding body in the rough grinding bin 22. One end of the second stent cage 74 is disposed on the second circular hole 721 and is fixedly connected to the second grate 72. The grinding bodies with smaller diameter in the fine grinding chamber 24 can be introduced into the discharge chamber 23 through the second rack cage 74 to discharge the grinding bodies with smaller diameter for replacing the grinding bodies in the fine grinding chamber 24.

The clamping plate 75 is disposed between the first grate plate 71 and the second grate plate 72, the other end of the first rack cage 73 is fixedly disposed on the side of the clamping plate 75 close to the first grate plate 71, the other end of the second rack cage 74 is fixedly disposed on the side of the clamping plate 75 close to the second grate plate 72, so as to prevent the grinding bodies with larger diameter in the rough grinding chamber 22 from entering the fine grinding chamber 24 and the grinding bodies with smaller diameter in the fine grinding chamber 24 from entering the rough grinding chamber 22, but the structure of the compartment device 7 is not limited thereto, and those skilled in the art can select the compartment device 7 with other suitable structure according to the actual discharge requirement of the embodiment.

Referring to fig. 8 again, the compartment device 7 further disclosed in this embodiment further includes a first bracket 76, a second bracket 77, and a plurality of support steel pipes 78, the first bracket 76 is disposed in the mill cylinder 2 and located between the rough grinding bin 22 and the discharging bin 23, the first grate plate 71 is fixedly disposed on the first bracket 76, the second bracket 77 is disposed in the mill cylinder 2 and located between the fine grinding bin 24 and the discharging bin 23, the second grate plate 72 is fixedly disposed on the second bracket 77, one end of each of the plurality of support steel pipes 78 is fixedly disposed on the first bracket 76, and the other end of each of the plurality of support steel pipes 78 is fixedly disposed on the second bracket 77, but not limited thereto.

Specifically, as shown in fig. 8, the first bracket 76 and the second bracket 77 are fixed between the rough grinding bin 22 and the discharge bin 23 and between the fine grinding bin 24 and the discharge bin 23 respectively by bolts, welding or clamping, and the first grate plate 71 and the second grate plate 72 are fixed on the first bracket 76 and the second bracket 77 respectively by screws, so as to facilitate the detachment and replacement thereof. Meanwhile, a plurality of support steel pipes 78 are welded between the first bracket 76 and the second bracket 77 to enhance the rigidity/stability of the first bracket 76 and the second bracket 77, but not limited thereto.

In a preferred embodiment, FIG. 9 is a schematic cross-sectional view taken along line B-B of FIG. 2. As shown in fig. 2 and fig. 9, the middle discharging ball mill 1 further comprises a curved surface stepped lining plate 8 and a plurality of pressing devices 9, the curved surface stepped lining plate 8 is attached to the inner wall of the mill cylinder 2, one ends of the pressing devices 9 penetrate through the mill cylinder 2 and are connected to the curved surface stepped lining plate 8, the curved surface stepped lining plate 8 is fixed to the inner wall of the mill cylinder 2, the curved surface stepped lining plate 8 is additionally arranged on the inner wall of the mill cylinder 2, so that the conveying capacity of materials in the mill cylinder 2 can be enhanced, the wear resistance and the service life of the inner wall of the mill cylinder 2 can be enhanced, and the use is not limited by the above.

In another preferred embodiment, referring to fig. 9 again, the pressing device 9 includes a door grinding cover 91, a pressing plate 92, a pressing beam 93 and a bolt assembly 94, the door grinding cover 91 and the curved stepped liner 8 are disposed on the mill cylinder 2, the pressing plate 92 and the door grinding cover 91 are correspondingly attached to the outer wall of the mill cylinder 2, the pressing beam 93 is disposed on the pressing plate 92, the door grinding cover 91 is disposed in the pressing beam 93, one end of the bolt assembly 94 is disposed in the curved stepped liner 8, and the other end passes through the pressing beam 93 and the door grinding cover 91 and is fixedly connected to the pressing beam 93 and the door grinding cover 91, so as to fix the curved stepped liner 8 on the inner wall of the mill cylinder 2, however, the structure of the pressing device 9 is not limited, and those skilled in the art can select another pressing device 9 with another suitable structure according to the teachings of the present embodiment.

To sum up, this application provides an intermediate ball mill of unloading, has the discharge bin in the middle of it, and both sides have the corase grind storehouse and finely grind the storehouse, unload the initial material after the corase grind storehouse through the discharge bin, screen, and unqualified material is carried back and is ground once more in finely grinding the storehouse, can avoid the energy loss that repeated grinding caused, improves grinding efficiency and output. Simultaneously, the ball mill of unloading in the middle of this application grinds unqualified material and initial material in corase grind storehouse and fine grinding storehouse respectively, can avoid because of "material pad" phenomenon that grinds the production together with it. And this application can also add the less rinding body of diameter in the fine grinding storehouse, solves because of the rinding body diameter is great, and unqualified material can not be ground by the rinding body problem.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An intermediate discharge ball mill for grinding initial materials and unqualified materials respectively, comprising:

the feeding device is arranged on the side, close to the drying bin, of the mill barrel and is communicated with the drying bin, the feeding device is used for feeding the initial materials to the drying bin, and the initial materials can sequentially enter the rough grinding bin and the discharging bin along with the rotation of the mill barrel after entering the drying bin;

the material returning device is arranged on the side, close to the fine grinding bin, of the mill cylinder and is communicated with the fine grinding bin, the material returning device is used for feeding the unqualified materials to the fine grinding bin, and the unqualified materials can enter the discharging bin along with the rotation of the mill cylinder after entering the fine grinding bin;

and the compartment device is arranged in the discharging bin and is used for discharging the initial materials after the coarse grinding bin is ground and the unqualified materials after the fine grinding bin is ground.

2. An intermediate discharge ball mill according to claim 1, characterized in that the partitioning device comprises:

the compartment bracket is arranged in the mill cylinder and positioned between the drying bin and the rough grinding bin, the middle part of the compartment bracket is provided with a through hole, and the initial material in the drying bin can enter the rough grinding bin through the through hole;

the blind plate is positioned on the side close to the rough grinding bin and arranged on the bin separation bracket;

and the air distribution plate is positioned close to the drying bin side and arranged on the partition bin support and covered on the through hole.

3. An intermediate discharge ball mill according to claim 1, characterized in that the feed back device comprises:

the upper end of the material returning cover is provided with a feeding hole, and the unqualified materials can enter the material returning cover through the feeding hole;

the transmission connecting pipe penetrates through the feed back cover, is connected with the mill cylinder and is communicated with the fine grinding bin, and can be driven to synchronously rotate by the mill cylinder;

the material returning mechanism is correspondingly arranged on the transmission connecting pipe with the feeding hole and is communicated with the interior of the transmission connecting pipe, and the material returning mechanism is used for conveying the unqualified materials into the transmission connecting pipe;

and the transmission connecting pipe lining is arranged on the inner wall of the transmission connecting pipe, and is provided with a transmission structure which can synchronously rotate along with the transmission connecting pipe so as to feed the unqualified materials to the fine grinding bin.

4. An intermediate discharge ball mill according to claim 3, characterized in that the feed back mechanism comprises:

when the material returning mechanism conveys the unqualified materials into the transmission connecting pipe, the unqualified materials enter the material returning cover from the feeding hole, fall into the material returning spoon and enter the transmission connecting pipe along the material returning spoon.

5. An intermediate discharge ball mill according to claim 3, characterized in that the transmission structure comprises:

the helical blades are arranged on the transmission connecting pipe lining at intervals to form a helical channel, and the helical channel is used for conveying the unqualified materials in the transmission connecting pipe into the cylinder body of the mill;

and the material pouring cone is arranged on the lining of the transmission connecting pipe corresponding to the material returning mechanism and used for guiding the unqualified material conveyed into the transmission connecting pipe by the material returning mechanism into the spiral channel.

6. An intermediate discharge ball mill according to claim 1, characterized in that the compartment device comprises:

the first grate plate is arranged in the cylinder body of the grinder and positioned between the coarse grinding bin and the discharging bin, a first round hole is formed in the middle of the first grate plate, and the initial material ground by the coarse grinding bin can enter the discharging bin through the first grate plate;

the second grate plate is arranged in the cylinder body of the mill and positioned between the fine milling bin and the discharging bin, a second round hole is formed in the middle of the second grate plate, and the unqualified materials ground by the fine milling bin can enter the discharging bin through the second grate plate;

one end of the first support cage is arranged on the first round hole and is fixedly connected with the first grate plate;

and the clamping plate is arranged between the first grate plate and the second grate plate, the other end of the first bracket cage is fixedly arranged on the side, close to the first grate plate, of the clamping plate, and the other end of the second bracket cage is fixedly arranged on the side, close to the second grate plate, of the clamping plate.

7. The intermediate discharge ball mill according to claim 6, characterized in that the compartment device further comprises:

the first bracket is arranged in the cylinder body of the grinder and positioned between the coarse grinding bin and the discharging bin, and the first grate plate is fixedly arranged on the first bracket;

the second bracket is arranged in the cylinder body of the mill and positioned between the fine milling bin and the discharging bin, and the second grate plate is fixedly arranged on the second bracket;

8. An intermediate discharge ball mill according to claim 1, characterized in that said drive means comprise:

a motor;

a speed reducer connected to the motor;

one end of the transmission mechanism is connected with the speed reducer, the other end of the transmission mechanism is connected with the mill cylinder, and the motor sequentially passes through the speed reducer and drives the mill cylinder to rotate.

9. The intermediate discharge ball mill according to claim 1, further comprising:

and one end of each pressing device penetrates through the mill cylinder body to be connected to the curved surface stepped lining plate, and the curved surface stepped lining plate is fixed on the inner wall of the mill cylinder body.

10. An intermediate discharge ball mill according to claim 9, characterized in that the compacting means comprise:

and one end of the bolt component is arranged in the curved surface stepped lining plate, and the other end of the bolt component penetrates through the pressing beam and the grinding door cover and is fixedly connected with the pressing beam and the grinding door cover, so that the curved surface stepped lining plate is fixed on the inner wall of the grinding machine barrel.