阅读说明：本技术 一种立磨机预选系统 (Vertical mill preselection system ) 是由 张德志 邓宏观 张俊江 彭立正 王峰 王崇欣 刘传俊 孟令海 姚国运 曾昭荣 公 于 2020-05-28 设计创作，主要内容包括：本发明涉及铁矿石筛选技术领域,具体涉及一种立磨机预选系统。包括转盘、研磨装置、预选箱、转动箱、升降模块和分选装置,所述转动箱、预选箱、研磨装置和转盘从上到下依次设置,所述升降模块设置在转动箱内,所述分选装置与升降模块连接,且所述分选装置存在位于预选箱内和位于转动箱内两种状态,当转动箱关闭时,所述分选装置位于预选箱内；当转动箱打开时,所述分选装置位于转动箱内。不仅能够对破碎机破碎后的粗铁矿进行初步研磨,减小了对立磨机的损耗,而且还能够对粗铁矿进行多级筛选,分级效率更高。(The invention relates to the technical field of iron ore screening, in particular to a vertical mill preselection system. The device comprises a rotary table, a grinding device, a preselection box, a rotary box, a lifting module and a sorting device, wherein the rotary box, the preselection box, the grinding device and the rotary table are sequentially arranged from top to bottom; when the rotating box is opened, the sorting device is positioned in the rotating box. Not only can carry out preliminary grinding to the coarse iron ore behind the breaker breakage, reduce the loss of opposition mill, but also can carry out multistage screening to the coarse iron ore, and classification efficiency is higher.)

1. A vertical mill preselection system, characterized by: the device comprises a rotary table, a grinding device, a preselection box, a rotary box, a lifting module and a sorting device, wherein the rotary box, the preselection box, the grinding device and the rotary table are sequentially arranged from top to bottom; when the rotating box is opened, the sorting device is positioned in the rotating box.

2. A vertical mill preselection system as defined in claim 1, wherein: the grinding device comprises a lower grinding disc, a gear ring is arranged on the periphery of the lower grinding disc, a plurality of first motors which are uniformly distributed are arranged in the circumferential direction of the outer side of the rotary disc, a gear is arranged on an output shaft of each first motor, a grinding groove is formed in the center of the lower grinding disc, and a rotation limiting groove is formed in the top of the outer edge of the rotary disc.

3. A vertical mill preselection system as defined in claim 2, wherein: the axial direction of preliminary election case is provided with a plurality of first sorting outlets and second sorting outlet, just first sorting outlet is two-layer about being located respectively with the second sorting outlet, first sorting outlet and second sorting outlet all are connected with the separation pipeline, the outward flange bottom of preliminary election case is provided with the rotation spacing ring, the rotation spacing ring is located and rotates the spacing inslot, still be provided with the frame on the preliminary election case, the frame is fixed subaerial.

4. A vertical mill preselection system as defined in claim 3, wherein: and a plurality of balls which are uniformly distributed are arranged on the rotating limiting ring.

5. A vertical mill preselection system as defined in claim 3, wherein: sorting pipeline end all is provided with elbow bend, and elbow bend opening down, elbow bend's opening below all is provided with conveyer, and the sorting pipeline length of being connected with first branch notch is greater than the sorting pipeline length of being connected with the second branch notch.

6. A vertical mill preselection system as defined in claim 5, wherein: the rotating box and the preselection box are provided with rotating seats, the two rotating seats are hinged, and a rotating motor is arranged in a hinged seat on the rotating box.

7. A vertical mill preselection system as defined in claim 6, wherein: lifting module includes elevating system, the terminal fixedly connected with fixed mounting panel of elevating system, the mounting panel bottom is positive to be provided with the rotation groove, the last second motor that is provided with of fixed mounting panel, sorting unit includes the pivot, the pivot upper end is provided with the rotating pin, the rotating pin rotates to be connected in rotating the inslot, the rotating pin is provided with roller thrust bearing with the junction that rotates the groove, be provided with initiative change gear in the pivot, be provided with driven change gear on the output shaft of second motor, initiative change gear passes through the belt with driven change gear and is connected, the pivot end is provided with the abrasive disc, be provided with the electro-magnet in the abrasive disc.

8. A vertical mill preselection system as defined in claim 7, wherein: the driving variable-speed wheel and the driven variable-speed wheel respectively comprise a plurality of arc-shaped wheel sheets, each arc-shaped wheel sheet is connected with a telescopic rod, and the telescopic rods are fixedly connected to the rotating shaft.

9. A vertical mill preselection system as defined in claim 8, wherein: the lifting mechanism and the telescopic rod are both provided with an air cylinder, a hydraulic cylinder or an electromagnetic push rod.

10. A vertical mill preselection system as defined in claim 7, wherein: and a damping device is arranged between the rotating shaft and the upper grinding disc.

Technical Field

The invention relates to the technical field of iron ore screening, in particular to a vertical mill preselection system.

Background

The conventional preselecting system has the problem of low preselecting efficiency, in the grading process, because the specific gravity difference between gangue (generally quartz and mica) and iron ore is large, the specific gravity of the gangue mineral with large particles is still lighter than that of the iron ore, so that the cyclone is difficult to carry out high-efficiency grading, the iron ore with high specific gravity and monomer dissociation still returns to the vertical mill to be repeatedly ground, and the overweight cyclic load of the grinding system is generally as high as 600-900%, and the treatment capacity of the grinding system is influenced.

Disclosure of Invention

In view of the defects, the invention provides a vertical mill preselecting system, and aims to provide a mill efficient preselecting system with high classification efficiency and accurate classification.

The technical scheme adopted by the invention for solving the technical problems is as follows: a vertical mill preselection system comprises a rotary table, a grinding device, a preselection box, a rotary box, a lifting module and a sorting device, wherein the rotary box, the preselection box, the grinding device and the rotary table are sequentially arranged from top to bottom; when the rotating box is opened, the sorting device is positioned in the rotating box. When the sorting device is positioned in the preselection box, two processes of grinding and sorting can be realized; when sorting unit was located and rotates the incasement, thereby it can rotate and make preselection case upper end opening to rotate the case, and then realizes the suction residue, adds new coarse ore and the higher iron ore sediment three process of discharge purity.

Further, the grinding device comprises a lower grinding disc, a gear ring is arranged on the periphery of the lower grinding disc, a plurality of first motors which are uniformly distributed are arranged in the circumferential direction of the outer side of the rotary disc, a gear is arranged on an output shaft of each first motor, the gear is meshed with the gear ring, the first motors rotate to drive the gears to rotate, the gear ring is driven to rotate, the rotation of the lower grinding disc is finally realized, a grinding groove is formed in the center of the lower grinding disc, and a rotation limiting groove is formed in the top of the outer edge of the rotary disc.

Furthermore, the preselection box includes the preselection casing, the axial direction of preselection casing is provided with a plurality of first branch select gates and second branch select gates, just two-layer about first branch select gate and second branch select gate are located respectively, first branch select gate and second select gate all are connected with the separation pipeline, the outward flange bottom of preselection casing is provided with rotates the spacing ring, it is located and rotates the spacing inslot to rotate the spacing ring, still be provided with the frame on the preselection casing, the frame is fixed subaerial. The frame can adopt the rag bolt among the prior art when with ground fixed connection, can set up the holistic stability of balancing weight reinforcing system simultaneously in the frame bottom.

Furthermore, a plurality of balls which are uniformly distributed are arranged on the rotary limiting ring. The purpose is to reduce the frictional force who rotates the spacing ring and rotate the spacing groove, rotates the spacing groove in addition and still is provided with lubricating grease between the spacing ring, and the ball can strengthen the lubricated effect of lubricating grease.

Furthermore, the tail end of the sorting pipeline is provided with a right-angled elbow, the opening of the right-angled elbow is downward, a conveying device is arranged below the opening of the right-angled elbow, and the length of the sorting pipeline connected with the first sorting port is larger than that of the sorting pipeline connected with the second sorting port. The purpose is to make the conveyer separately convey in order, make the ore that preselects from the first separation port and ore that preselects from the second separation port convey to the vertical mill in good order; the ore pre-selected from the second port is fed into the vertical mill by the conveyor means first and then the ore pre-selected from the first port is fed into the vertical mill.

Furthermore, the rotating box and the preselection shell are both provided with rotating seats, the two rotating seats are hinged, and a rotating motor is arranged in a hinged seat on the rotating box. The rotation of the rotating motor can realize the rotation of the rotating box, when the sorting device and the grinding device are all positioned in the rotating box, the ore with smaller particles and higher iron content is adsorbed on the upper grinding disc, the rotation of the rotating box can transfer the ore adsorbed from the grinding groove to a collecting system at the outer side of the preselecting shell, and the part of ore does not need to be ground by a vertical mill due to higher iron content; because the rotation case rotates and makes preselection casing upper end opening, alright this moment use the husky flood dragon conveyor of inhaling among the prior art will grind the extremely low or the residue suction that does not contain iron content in the inslot, the process of suction residue is not every time the rotation case rotates and all needs go on, and technical personnel in the art can operate according to actual conditions.

Further, the lifting module comprises a lifting mechanism, the tail end of the lifting mechanism is fixedly connected with a fixed mounting plate, a rotating groove is arranged in the center of the bottom of the mounting plate, a second motor is arranged on the fixed mounting plate, the sorting device comprises a rotating shaft, a rotating pin is arranged at the upper end of the rotating shaft, the rotating pin is rotatably connected in a rotating groove, a roller thrust bearing is arranged at the joint of the rotating pin and the rotating groove, because the rotating shaft needs to be switched between a high-speed rotating state and a low-speed rotating state continuously, the roller thrust bearing is arranged for reducing the axial force, further reducing the abrasion of the connection part, a driving speed change wheel is arranged on the rotating shaft, a driven speed change wheel is arranged on the output shaft of the second motor, the driving variable-speed wheel is connected with the driven variable-speed wheel through a belt, an upper grinding disc is arranged at the tail end of the rotating shaft, and an electromagnet is arranged in the upper grinding disc. After the electromagnet is electrified, the iron-containing ore can be attracted through the shell of the upper grinding disc, the magnetic force of the electromagnet can be adjusted according to the actual situation by a person skilled in the art, and the lifting mechanism is arranged to realize the lifting of the upper grinding disc, so that the upper grinding disc can be positioned at the bottom of the preselection shell to facilitate grinding, and can be positioned at the height of the first separation port and the second separation port to facilitate the separation of the iron-containing ore.

Further, initiative change gear and driven change gear all include a plurality of arc wheel pieces, and every arc wheel piece all is connected with the telescopic link, telescopic link fixed connection is in the pivot. The telescopic rod and the arc wheel piece are arranged for realizing the adjustment of the diameters of the driving variable speed wheel and the driven variable speed wheel, when the upper grinding disc is used for grinding, the rotating speed is not required to be fast, and the diameter of the driving variable speed wheel is smaller than that of the driven variable speed wheel; when the grinding disc is positioned on the same horizontal plane of the second sorting port, the ore with larger mass and containing a certain amount of iron is sorted out by a certain centrifugal force, and the diameter of the driving speed change wheel is equal to that of the driven speed change wheel; when the grinding disc is positioned on the same horizontal plane of the first sorting port, ore with smaller mass and higher iron content needs to be sorted out by larger centrifugal force, and the diameter of the driving speed change wheel is larger than that of the driven speed change wheel.

Furthermore, the lifting mechanism and the telescopic rod are both provided with a cylinder, a hydraulic cylinder or an electromagnetic push rod. The elevating mechanism and the telescopic bar are not limited to the three structures mentioned in the present embodiment.

Furthermore, a damping device is arranged between the rotating shaft and the upper grinding disc. The damping device can adopt a spring or other structures with damping effect.

The invention has the beneficial effects that: the vertical mill preselection system provided by the invention not only can be used for primarily grinding the coarse iron ore crushed by the crusher, so that the loss of the vertical mill is reduced, but also can be used for carrying out multi-stage screening on the coarse iron ore, and the grading efficiency is higher.

Drawings

FIG. 1 is an axial schematic view of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic view of the main structure of the present invention;

FIG. 4 is a schematic longitudinal cross-sectional view of the present invention;

FIG. 5 is an enlarged view of portion A of FIG. 4;

FIG. 6 is an enlarged view of portion B of FIG. 4;

fig. 7 is a schematic cross-sectional view of the present invention.

The automatic sorting machine comprises a machine body, a rotary table, a grinding device, a pre-selecting box, a rotating box, a lifting module, a sorting device, a gear ring, a 202, a first motor, a 203, a gear, a 204, a grinding groove, a 205, a rotating limiting groove, a 301, a pre-selecting shell, a 302, a rack, a 303, a first sorting port, a 304, a second sorting port, a 305, a rotating seat, a 306, a rotating limiting ring, a 307, balls, a 308, a sorting pipeline, a 401, a rotating motor, a 501, a fixed mounting plate, a 502, a rotating groove, a 601, a second motor, a 602, a driving change gear, a 603, a driven change gear, a 604, a belt, a 605, an upper grinding disc, a 606, an electromagnet, a 607, a telescopic rod, a 608, a damping device, a 609 and a rotating pin.

Detailed Description

In order to make the technical means, technical features, objects and technical effects of the present invention easily understandable, the present invention is further described below with reference to the specific drawings.

Example 1:

as shown in fig. 1-7, the preselection system of the vertical mill provided by the invention comprises a rotary table 1, a grinding device 2, a preselection box 3, a rotary box 4, a lifting module 5 and a sorting device 6, wherein the rotary box 4, the preselection box 3, the grinding device 2 and the rotary table 1 are sequentially arranged from top to bottom, the lifting module 5 is arranged in the rotary box 4, the sorting device 6 is connected with the lifting module 5, the sorting device 6 is positioned in the preselection box 3 and the rotary box 4, and when the rotary box 4 is closed, the sorting device 6 is positioned in the preselection box 3; when the rotating box 4 is opened, the sorting device 6 is located inside the rotating box 4. When the sorting device 6 is positioned in the preselection box 3, two processes of grinding and sorting can be realized; when sorting unit 6 was located and rotates case 4, thereby rotate case 4 and can rotate and make 3 upper end openings of preliminary election case, and then realize the suction residue, add new coarse ore and the higher iron ore sediment three process of discharge purity.

In this embodiment, the grinding device 2 includes a lower grinding disc 605, a toothed ring 201 is arranged on the periphery of the lower grinding disc 605, a plurality of first motors 202 which are uniformly distributed are arranged in the circumferential direction outside the rotary disc 1, a gear 203 is arranged on an output shaft of the first motor 202, the gear 203 is meshed with the toothed ring 201, the first motor 202 rotates to drive the gear 203 to rotate, the toothed ring 201 is further driven to rotate, the rotation of the lower grinding disc 605 is finally realized, a grinding groove 204 is arranged in the center of the lower grinding disc 605, and a rotation limiting groove 205 is formed in the top of the outer edge of the rotary disc 1.

In this embodiment, the preselection box 3 includes a preselection housing 301, the axial direction of preselection housing 301 is provided with a plurality of first sorting ports 303 and second sorting ports 304, and first sorting ports 303 and second sorting ports 304 are located two-layer from top to bottom respectively, first sorting ports 303 and second sorting ports 304 all are connected with sorting pipeline 308, the outward flange bottom of preselection housing 301 is provided with rotates spacing ring 306, rotate spacing ring 306 and be located and rotate spacing groove 205, still be provided with frame 302 on the preselection housing 301, frame 302 is fixed subaerial. The frame 302 can adopt the rag bolt among the prior art when with ground fixed connection, can set up the holistic stability of balancing weight reinforcing system simultaneously in frame 302 bottom.

In this embodiment, the end of each sorting pipe 308 is provided with a right-angled bend, the opening of the right-angled bend faces downward, the conveying device is arranged below the opening of the right-angled bend, and the length of the sorting pipe 308 connected with the first sorting port 303 is greater than that of the sorting pipe 308 connected with the second sorting port 304. The purpose is to make the conveyor convey separately in order, so that the ore preselected from the first sorting port 303 and the ore preselected from the second sorting port 304 are conveyed into the vertical mill in a well-ordered manner; the ore preselected from the second tap port 304 is larger in size and relatively low in iron content and therefore requires a longer grinding time in the vertical mill, while the ore preselected from the first tap port 303 is smaller in size and relatively high in iron content and therefore does not require a longer grinding time in the vertical mill, so the conveyor means first feeds the ore preselected from the second tap port 304 to the vertical mill and then feeds the ore preselected from the first tap port 303 to the vertical mill.

In this embodiment, the rotating base 305 is provided on the rotating box 4 and the preselection housing 301, and the two rotating bases 305 are hinged, and the rotating motor 401 is provided in the hinged base on the rotating box 4. The rotation of the rotating motor 401 can realize the rotation of the rotating box 4, when the sorting device 6 and the grinding device 2 are all positioned in the rotating box 4, the ore with smaller particles and higher iron content is adsorbed on the upper grinding disc 605 at the moment, the rotation of the rotating box 4 can transfer the ore adsorbed from the grinding groove 204 into a collecting system at the outer side of the preselecting shell 301, and the part of ore does not need to be ground by a vertical mill due to higher iron content; since the rotary box 4 rotates to open the upper end of the preselection shell 301, the sand sucking dragon conveying device in the prior art can be used for sucking out residues with extremely low or no iron content in the grinding groove 204, the process of sucking out the residues is not required to be carried out every time the rotary box 4 rotates, and the operation can be carried out by a person skilled in the art according to actual conditions.

In this embodiment, the lifting module 5 includes a lifting mechanism, the end of the lifting mechanism is fixedly connected with a fixed mounting plate 501, a rotation groove 502 is arranged in the center of the bottom of the mounting plate, a second motor 601 is arranged on the fixed mounting plate 501, the sorting device 6 includes a rotating shaft, a rotation pin 609 is arranged on the upper end of the rotating shaft, the rotation pin 609 is rotatably connected in the rotation groove 502, a roller thrust bearing is arranged at the joint of the rotation pin 609 and the rotation groove 502, since the rotating shaft needs to be constantly switched between a high-speed rotation state and a low-speed rotation state, the roller thrust bearing is arranged to reduce the axial force and further reduce the abrasion at the joint, a driving change wheel 602 is arranged on the rotating shaft, a driven change wheel 603 is arranged on the output shaft of the second motor 601, the driving change wheel 602 is connected with the driven change wheel 603 through a belt 604, an upper grinding disc 605 is arranged at the tail end of the rotating shaft, and an electromagnet 606 is arranged in the upper grinding disc 605. The electromagnet 606 is energized to attract the iron-containing ore through the outer casing of the upper grinding disk 605, the magnetic force of the electromagnet 606 can be adjusted by those skilled in the art according to the actual situation, and the lifting mechanism is provided to lift the upper grinding disk 605 so that the upper grinding disk can be positioned at the bottom of the preselection housing 301 for grinding and can be positioned at the height of the first sorting port 303 and the second sorting port 304 for sorting the iron-containing ore.

In this embodiment, the driving transmission wheel 602 and the driven transmission wheel 603 each include a plurality of arc-shaped wheel pieces, each arc-shaped wheel piece is connected with a telescopic rod 607, and the telescopic rods 607 are fixedly connected to the rotating shaft. The telescopic rod 607 and the arc wheel sheet are arranged to realize the adjustment of the diameters of the driving variable-speed wheel 602 and the driven variable-speed wheel, when the upper grinding disk 605 is used for grinding, the rotating speed is not required to be fast, and the diameter of the driving variable-speed wheel 602 is smaller than that of the driven variable-speed wheel 603; when the grinding disc 605 is positioned on the same horizontal plane of the second sorting port 304, a certain centrifugal force is needed to sort out ore with larger mass and containing a certain amount of iron, and the diameter of the driving variable-speed wheel 602 is equal to that of the driven variable-speed wheel 603; when the grinding disc 605 is located at the same level as the first sorting port 303, a larger centrifugal force is required to sort out ore with smaller mass and higher iron content, and the diameter of the driving gearbox 602 is larger than that of the driven gearbox 603.

In this embodiment, the lifting mechanism and the telescopic rod 607 both adopt an air cylinder, a hydraulic cylinder or an electromagnetic push rod. The lifting mechanism and the telescopic rod 607 are not limited to the three structures mentioned in the present embodiment.

Example 2:

in the present embodiment, the remaining technical features are the same, and the difference is only that: the rotating limiting ring 306 is provided with a plurality of balls 307 which are uniformly distributed. The purpose is to reduce the friction between the rotation limiting ring 306 and the rotation limiting groove 205, and in addition, lubricating grease is also arranged between the rotation limiting groove 205 and the rotation limiting ring 306, and the ball 307 can enhance the lubricating effect of the lubricating grease.

Example 3:

in the present embodiment, the remaining technical features are the same, and the difference is only that: a damping device 608 is arranged between the rotating shaft and the upper grinding disc 605. The shock absorbing device 608 may be a spring or other structure having a shock absorbing effect.

The working principle and the using method are as follows:

in the initial state, the lifting device and the sorting device 6 are both positioned in the rotating box 4, the upper end of the preselection shell 301 is opened, and the diameter of the driving gearbox 602 is smaller than that of the driven gearbox 603.

S1: conveying the coarse iron ore crushed by the crusher from an opening at the upper end of the preselection box 3 to a grinding groove 204 of a lower grinding disc 605;

s2: the rotating motor 401 is started, the lifting mechanism in the lifting device extends to enable the whole sorting device 6 to descend, the first motor 202 rotates to drive the gear 203 and the toothed ring 201 to rotate, so that the lower grinding disc 605 rotates, the second motor 601 rotates to drive the driving variable-speed wheel 602 and the driven variable-speed wheel 603 to rotate, so that the rotating shaft is driven to rotate, and finally the upper grinding disc 605 rotates, the rotating direction of the upper grinding disc 605 is opposite to that of the lower grinding disc 605, so that the coarse iron ore is primarily ground;

s3: the electromagnet 606 is electrified and shortens the lifting mechanism in the lifting device, so that the upper grinding disc 605 moves to the same horizontal plane of the second sorting port 304, the length of the telescopic rod 607 is adjusted, the diameter of the driving speed change wheel 602 is equal to that of the driven speed change wheel 603, the second motor 601 rotates, the upper grinding disc 605 rotates to generate centrifugal force, the iron ore adsorbed on the upper grinding disc 605 is thrown to the second sorting port 304, and the iron ore enters the vertical mill along the sorting pipeline 308 through the conveying device;

s4: shortening the lifting mechanism in the lifting device again to move the upper grinding disc 605 to the same horizontal plane of the first sorting port 303, adjusting the length of the adjusting telescopic rod 607 to ensure that the diameter of the driving speed change wheel 602 is larger than that of the driven speed change wheel 603, rotating the second motor 601 to ensure that the upper grinding disc 605 rotates to generate centrifugal force to throw the iron ore adsorbed on the upper grinding disc 605 to the first sorting port 303, and then the iron ore enters the vertical mill along the sorting pipeline 308 after passing through the conveying device;

s5: the above process is repeated until only iron slag and a gangue residue containing no iron are left in the raw iron ore in the grinding tank 204:

s6: adjusting a lifting mechanism of the lifting device to enable the sorting device 6 to be completely positioned in the rotating box 4, starting the rotating motor 401 to enable the rotating box 4 to rotate out of the preselection box 3, turning off a power supply of the electromagnet 606, and enabling the iron slag adsorbed on the electromagnet 606 and not thrown away by centrifugal force to fall into a prepared collecting device for standby;

s7: the sand sucking dragon conveying device is used for sucking the gangue residues with extremely low iron content or no iron content in the grinding groove 204, and the process of sucking the gangue residues is not required to be carried out every time the rotating box 4 rotates.

In summary, the embodiments of the present invention are merely exemplary and should not be construed as limiting the scope of the invention. All equivalent changes and modifications made according to the content of the claims of the present invention should fall within the technical scope of the present invention.