CN113953062A - Self-sorting ball milling system for grinding superfine materials - Google Patents
Self-sorting ball milling system for grinding superfine materials Download PDFInfo
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- CN113953062A CN113953062A CN202111208943.XA CN202111208943A CN113953062A CN 113953062 A CN113953062 A CN 113953062A CN 202111208943 A CN202111208943 A CN 202111208943A CN 113953062 A CN113953062 A CN 113953062A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
- B02C21/002—Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill
- B02C21/005—Disintegrating plant with or without drying of the material using a combination of a roller mill and a drum mill the roller mill having cooperating rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/10—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls with one or a few disintegrating members arranged in the container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
- B02C17/186—Adding fluid, other than for crushing by fluid energy
- B02C17/1875—Adding fluid, other than for crushing by fluid energy passing gas through crushing zone
- B02C17/1885—Adding fluid, other than for crushing by fluid energy passing gas through crushing zone the applied gas acting to effect material separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/18—Details
- B02C17/183—Feeding or discharging devices
- B02C17/186—Adding fluid, other than for crushing by fluid energy
- B02C17/1875—Adding fluid, other than for crushing by fluid energy passing gas through crushing zone
- B02C17/189—Adding fluid, other than for crushing by fluid energy passing gas through crushing zone with return of oversize material to crushing zone
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/30—Passing gas through crushing or disintegrating zone the applied gas acting to effect material separation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
- B02C23/24—Passing gas through crushing or disintegrating zone
- B02C23/32—Passing gas through crushing or disintegrating zone with return of oversize material to crushing or disintegrating zone
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a self-sorting ball milling system for grinding superfine materials, which comprises a raw material bin, a self-sorting ball mill, a dust collector and a fan, wherein an outlet of the raw material bin is connected with a feed inlet of the self-sorting ball mill; the self-sorting ball mill comprises a barrel, a feeding hole and a discharging hole, wherein the barrel inclines upwards from the side of the feeding hole to the side of the discharging hole, and the inclination angle is 2-5 degrees; a grinding bin and a powder selecting bin are sequentially arranged in the barrel from the feeding hole to the discharging hole, and a main partition board is arranged between the grinding bin and the powder selecting bin; the powder selecting bin is internally provided with a static powder selecting machine and/or a dynamic powder selecting machine. The ball mill can ball mill the superfine material, and can discharge qualified fine powder generated in the grinding process in time, reduce the excessive grinding of the material in the ball mill, save the power consumption of grinding, and be beneficial to energy conservation and emission reduction of production enterprises.
Description
Technical Field
The invention relates to the technical field of ball milling, in particular to a self-sorting ball milling system for grinding superfine materials.
Background
The ball mill comprises a cylinder and a grinding body, when the ball mill cylinder rotates, the grinding body is attached to a cylinder lining plate and taken away by the cylinder due to the action of inertia, centrifugal force and friction force, when the ball mill cylinder is taken to a certain height, the ball mill is thrown down due to the gravity action of the ball mill cylinder, and the thrown-down grinding body crushes materials under the action of gravity and impact force to realize material grinding. The ball mill has simple structure and good equipment reliability, and is widely applied to industries such as building materials, mineral separation, metallurgy, electric power, medicine, food, chemical industry and the like. The ball mill can be divided into a dry type and a wet type according to different grinding environments; according to different transmission modes, the transmission mode can be divided into a center transmission mode and an edge transmission mode.
Although the ball mill has a simple structure, the grinding principle of the ball mill is single-particle impact crushing, the grinding efficiency is low, and a large amount of energy is converted into potential energy for lifting the steel balls and the materials, kinetic energy for impact between the steel balls and grinding heating during material grinding. Research data show that the energy utilization rate of the ball mill is less than 5%. Because the thick and thin materials in the ball mill are mixed, the fine powder meeting the product requirement is easy to agglomerate in the mill, the agglomerated materials are bonded on the lining plate to form a cushion layer, and researches show that when the cushion layer of the lining plate is 0.2mm, the impact force of the steel ball is reduced by 80%. The external embodiment is that the ball mill has the problems of ball pasting, full grinding and the like, so that the ball mill cannot be normally produced, or the production energy consumption is very high during the production of the ball mill. Zhou good (cement technology, 6 th year 2014) introduced a technology of grinding ultrafine cement grouting material by using a phi 2.6 x 13m ball mill, and when the ultrafine cement is completely produced by using P.O 52.5 cement, the ball is seriously pasted by the mill; when the clinker and gypsum are used to grind the superfine cement, the output is too low and the power consumption is too high. The scheme adopted finally is as follows: 70 percent of P.O 52.5 is adopted, and 30 percent of clinker and gypsum are added, so that the grinding machine can be ensured to be connected with the grinding machineContinuing normal production; after grinding, 8 percent of silica fume (specific surface area 2000 m) is added2/kg) are put into a powder concentrator together to realize that the specific surface area of the product is more than or equal to 800m2And the power consumption of the working procedure is up to 155 kW/t.
Therefore, in order to improve the yield of the ball mill system and reduce the grinding energy consumption, a powder concentrator technology gradually appears. The method comprises the following steps: and (3) sending the material ground by the ball mill into a powder selecting machine through a lifter, so that qualified materials are selected in time in the powder selecting machine, and unqualified materials return to the ball mill for continuous grinding. Due to the appearance and maturity of the powder concentrator technology, the power consumption of a grinding system of the ball mill is greatly reduced, but materials need to be lifted to the top of the powder concentrator due to the limitation of process arrangement, so that the equipment is increased, the civil engineering cost is increased, and the investment cost is high.
Chinese patent publication No. CN201197950 discloses an internal selection powder screening composite cement mill, which comprises a cylinder and an internal screening device, wherein the internal screening device comprises a grate plate, a coarse powder guide cone, a tubular screen, a fine powder guide cone and an annular pipe. One end of the tubular sieve is arranged on the circumferential surface of the annular pipe and is communicated with the annular pipe, the other end of the tubular sieve is arranged on the inner wall of the cylinder body, and the annular pipe is provided with a coarse powder guide cone and a fine powder guide cone at the end, and the tubular sieve further comprises a sieve plate, a ventilation grate plate and a material blocking inclined plate. The ventilation grate plate is arranged at the other end of the annular pipe, the sieve plate is arranged between the tubular sieve and the ventilation grate plate, one side surface of the tubular sieve is arranged on the sieve plate, and the material blocking inclined plate is arranged on the edge of the outer end of the sieve surface of the tubular sieve. The essence of the method is that the functions of the partition board are supplemented, and a grate board is arranged in front of the original partition board, but the method has no substantial internal selection and screening functions.
Chinese patent publication No. CN101920219A discloses an internal powder selecting device for a dry ball mill, which is characterized in that a stainless steel powder selecting pipe is installed in an inner cavity of the dry ball mill, and is connected with a powder selecting connecting pipe i and a powder selecting connecting pipe ii of a mill tail separation bin in parallel, a finished product conveying pipe, a catcher (cyclone and cloth bag type dust remover group), a fan, a stainless steel material return pipe, and a ball mill are sequentially connected in an air and material closed circuit. The powder selecting pipe timely selects finished materials formed by grinding the mill interior and mill tail in a negative pressure state by utilizing the suction force of the fan. The core of the method is that a steel pipe is arranged in a grinding bin of the ball mill, and a finished product is selected out through the steel pipe under the action of negative pressure. The stainless steel powder selecting pipe is arranged in the grinding bin, and the steel ball is thrown down to easily deform the steel pipe, so that the stainless steel powder selecting pipe has no practicability; in addition, the powder is drawn out of the steel pipe by the negative pressure, and the powder sorting function is not provided.
In addition, the existing superfine material ball milling system has serious problems of over-grinding and ball pasting during production, so that the production energy consumption is extremely high, and the energy utilization rate is low; the problem of ball pasting in the ball mill can be relieved to a certain extent by adding the dispersing agent by adopting a conventional solution scheme, but the dispersing agent is organic matter, so that the compatibility of superfine materials and other organic products is influenced, and the application range of the product is very limited.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a self-sorting ball milling system for milling superfine materials, which can discharge qualified fine powder generated in the ball milling process in time, reduce the phenomenon of fine powder agglomeration or over-milling in a ball mill, improve the air efficiency of the system, reduce the air energy consumption of the system, reduce the height of a workshop, reduce the investment cost of a milling system, reduce the milling energy consumption of the ball mill, improve the milling efficiency, increase the energy utilization rate, and promote energy conservation and emission reduction.
The invention is realized in this way, a self-sorting ball milling system for grinding superfine materials, comprising a self-sorting ball mill, a dust collector and a fan, wherein the discharge port of the self-sorting ball mill is connected with the inlet of the dust collector, and the air outlet of the dust collector is connected with the fan;
the self-sorting ball mill comprises a cylinder, a feeding hole and a discharging hole, wherein the cylinder inclines upwards from the side of the feeding hole to the side of the discharging hole, and the inclination angle is 2-5 degrees; a grinding bin and a powder selecting bin are sequentially arranged in the barrel from a feeding hole to a discharging hole, and a main partition board is arranged between the grinding bin and the powder selecting bin; and a static powder concentrator and/or a dynamic powder concentrator are arranged in the powder concentration bin.
Preferably, the ball milling system further comprises roller mill equipment, a combined type powder concentrator and a cyclone, wherein a discharge port of the roller mill equipment is connected with a feed port of the combined type powder concentrator through a hoisting machine, a discharge port at the bottom of the combined type powder concentrator is connected with the feed port of the roller mill equipment, a discharge port at the upper part of the combined type powder concentrator is connected with an inlet of the cyclone, and a discharge port at the bottom of the cyclone is connected with a feed port of the self-sorting type ball mill.
Preferably, an inclined lining plate is arranged on the inner wall of the powder selecting bin, and an included angle between the inclined lining plate and the axis of the barrel is 3-15 degrees.
Preferably, the dynamic powder concentrator is composed of a rotor, a counterattack cone, a transmission shaft and a powder concentrator drive, blades of the rotor are parallel to an inclined lining plate in the powder concentrator, the counterattack cone is fixed at one end of the rotor close to the feeding side, and the diameter of the counterattack cone is the same as the outer diameter of the rotor; the rotor is connected with the powder concentrator through a transmission shaft for driving.
Preferably, when only the dynamic powder concentrator is arranged in the powder separation bin, the main bin partition plate is provided with vent holes positioned in a central area and grate seams positioned on the periphery, the center of each vent hole is coaxial with the mill barrel, the diameter of each vent hole is 0.2-0.4 times of that of the mill barrel, each vent hole is of a net structure, and the effective size of each mesh hole is 10-15 mm; the grate seam close to the periphery of the vent hole is a conical grate seam, the diameter of the grate seam is gradually increased from the grinding bin side to the powder selecting bin side, the diameter of the grate seam close to the grinding bin side is 4-10 mm, and the diameter of the grate seam close to the powder selecting bin side is 6-12 mm; the grate seam close to the edge area of the main partition plate is a long-strip-shaped grate seam, and the length is 25mm and the width is 4 mm; the thickness of the main partition bin plate is 20-60 mm.
Preferably, when the powder selecting bin is internally provided with the static powder selecting machine and the dynamic powder selecting machine, the static blades of the static powder selecting machine are arranged in a conical shape, and the static powder selecting machine is positioned between the main bin separating plate and the dynamic powder selecting machine.
Preferably, the static powder concentrator comprises static blades which are arranged in a conical manner or are arranged in parallel with the axis of the cylinder;
when the static blades are arranged in a conical shape, the included angle between the static blades and the axis of the barrel is 45-65 degrees, the diameter of the section of the cone of the static blades is gradually increased from the grinding bin side to the powder selecting bin side, one end, close to the grinding bin, of each static blade is fixed on the main partition board, and the other end of each static blade is fixed on the barrel; at the moment, the inner area of the intersection of the main partition plate and the conical static blades is a blind plate, and the outer area is provided with a grid seam; each static blade is 50-300 mm in width, and the gap between every two adjacent static blades is 50-400 mm;
when the static blades are arranged in parallel with the axis of the cylinder body, one end of each static blade close to the grinding bin is fixed on the main bin partition plate, and the other end of each static blade is fixed on the cylinder body; at the moment, the inner area of the intersection of the main partition board and the static blades is a blind plate, and the outer area is provided with a grid seam; the width of each static blade is 50-300 mm, and the gap between every two adjacent static blades is 100-400 mm.
Preferably, the grinding lining plate is arranged on the inner wall of the barrel body of the grinding bin, and a plurality of activation rings are arranged in the grinding bin.
Preferably, the included angle between the feed inlet and the axis of the cylinder body is greater than 45 degrees, and an external fixing structure is adopted and does not rotate along with the cylinder body.
Preferably, the discharge end of the feed inlet is provided with a material preventing device, the material preventing device is composed of a conical telescopic steel sheet, a light spring and a lifting plate, the conical telescopic steel sheet is positioned on the inner side of the lifting plate, the large-diameter end of the conical telescopic steel sheet is fixed on the lifting plate, and the small-diameter end of the conical telescopic steel sheet is connected with the lifting plate through the light springs; the conical telescopic steel sheet is formed by sequentially stacking and enclosing a plurality of baffle plates, and each baffle plate corresponds to one light spring; the length of the lifting plate is greater than that of the tapered telescopic steel sheet.
The invention has the following advantages and beneficial effects:
1) the ball milling system is more suitable for milling the ultrafine powder, can discharge the qualified fine powder generated in the milling process in time, reduces the over-milling of materials in the ball mill, saves the power consumption of milling, and is beneficial to energy conservation and emission reduction of production enterprises.
2) The ball milling system can shorten the time for adjusting the quality of finished products, adjust the material quantity and the finished product quantity in the ball mill in real time, efficiently control the yield, improve the production efficiency and reduce the production cost.
3) According to the self-sorting ball mill, the grinding and sorting of materials are completed in the ball mill, an external powder concentrator is not needed, the height and the floor area of a factory building can be effectively reduced, auxiliary equipment such as a hoister and a conveying chute can be reduced, the investment cost is saved, the equipment failure rate is reduced, and the production and maintenance cost is reduced.
4) The self-sorting ball mill integrates grinding and sorting, reduces the process flow, improves the air efficiency of the system, reduces the air volume by 50-70% compared with the traditional circulation system, and reduces the energy consumption of the air used by the system.
5) According to the self-sorting ball mill, the powder selecting machine and the ball mill are on the same horizontal plane, and the height of the powder selecting machine of the traditional circulation system is 2-3 times of the height of the ball mill, so that compared with the traditional circulation (the ball mill and the powder selecting machine) system, the self-sorting ball mill disclosed by the invention has the advantages that the height of the lifted material is reduced, the potential energy required to be overcome is reduced, and the production energy consumption of the system is saved.
6) The self-sorting ball mill provided by the invention has the advantages that auxiliary equipment such as a lifter, a conveying chute and a conveying chute are omitted, pollution points of leakage and leakage in a system are reduced, disordered discharge of dust is reduced, and clean production and environmental protection are facilitated.
Drawings
Fig. 1 is a flow chart of a self-sorting ball milling system for grinding ultra-fine materials according to an embodiment of the present invention;
fig. 2 is a flow chart of a self-sorting ball milling system for grinding ultra-fine materials according to a second embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a self-sorting ball mill provided in the third embodiment of the present invention;
FIG. 4 is a front view of a main compartment plate according to a third embodiment of the present invention;
FIG. 5 is a sectional view of a main partition panel according to a third embodiment of the present invention;
fig. 6 is a schematic structural diagram of an anti-shock device provided in the third embodiment of the present invention;
FIG. 7 is a schematic structural diagram of an activation ring provided in the third embodiment of the present invention;
FIG. 8 is a schematic structural diagram of a self-sorting ball mill according to a fourth embodiment of the present invention;
FIG. 9 is a front view of a main bulkhead according to a fourth embodiment of the present invention;
FIG. 10 is a sectional view of a main partition panel according to a fourth embodiment of the present invention;
FIG. 11 is a schematic structural diagram of a self-sorting ball mill provided in the fifth embodiment of the present invention;
FIG. 12 is a front view of a main bulkhead according to a fifth embodiment of the present invention;
FIG. 13 is a sectional view of a main bulkhead according to a fifth embodiment of the present invention.
In the figure: 1. a first hoist; 2. a buffer bin; 3. a roller mill device; 4. a second hoist; 5. a combined powder concentrator; 6. a cyclone; 7. a self-sorting ball mill; 8. a dust collector; 9. a fan; 11. a raw material bin; 12. a belt scale;
10. a barrel; 101. a feed inlet; 102. a discharge port; 103. a dust collection port;
20. a grinding bin; 201. grinding the lining plate; 202. an activation ring;
30. a powder selecting bin; 301. an inclined lining plate; 310. a dynamic powder concentrator; 311. a rotor; 312. a counterattack cone; 313. a drive shaft; 314. driving the powder concentrator; 320. static powder selecting machine; 321. a static blade;
40. a main partition panel; 401. a vent hole; 402. performing grate joint;
50. a material anti-scour device; 501. a tapered retractable steel sheet; 5011. a baffle plate; 502. a light spring; 503. a material raising plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1, the present embodiment provides a self-sorting ball milling system for grinding ultrafine materials, which includes a raw material bin 11, a belt scale 12, a self-sorting ball mill 7, a dust collector 8, and a blower 9. Wherein, the raw material bin 11 is connected with a feed inlet 101 of the self-sorting ball mill 7 through a belt weigher 12, a discharge outlet 102 of the self-sorting ball mill 7 is connected with an inlet of a dust collector 8, and an air outlet of the dust collector 8 is connected with a fan 9.
Materials in the raw material bin 11 are conveyed to a self-sorting type ball mill 7 after being metered by a belt weigher 12, the materials are ground in a grinding bin 20 and then enter a powder selecting bin 30 for sorting, sorted finished products enter a dust collector 8, and sorted coarse powder returns to the grinding bin 20 to enter the next circulation; finished products are collected by the dust collector 8 and conveyed to a finished product bin for storage, and waste gas discharged from the dust collector 8 is discharged into a chimney through the fan 9 and finally into the atmosphere.
The system is suitable for materials with the water content of the grinding raw materials less than 2% and the granularity of the ground products less than 80 mu m, can be used for processing raw materials, cement, coal powder and other materials in the field of building materials, and can be used for grinding ultrafine materials in the field of non-metallic ores, such as the production of ground limestone, talcum powder and the like.
Example 2
Referring to fig. 2, the present embodiment provides a self-classifying ball milling system for milling ultra-fine materials, which includes a roller mill 3 (roller press or external circulation vertical mill), a combined powder classifier 5, a cyclone 6, a self-classifying ball mill 7, a dust collector 8 and a fan 9. The discharge hole of the roller mill 3 (a roller press or an external circulation vertical mill) is connected with the feed hole of the combined type powder concentrator 5 through the second elevator 4, the bottom discharge hole of the combined type powder concentrator 5 is connected with the feed hole of the roller mill 3 through the first elevator 1 and the buffer bin 2 in sequence, the upper discharge hole of the combined type powder concentrator 5 is connected with the inlet of the cyclone cylinder 6, the bottom discharge hole of the cyclone cylinder 6 is connected with the feed hole 101 of the self-sorting type ball mill 7, the discharge hole 102 of the self-sorting type ball mill 7 is connected with the inlet of the dust collector 8, and the air outlet of the dust collector 8 is connected with the fan 9.
Raw materials enter a buffer bin 2 through a first lifting machine 1 and then enter a roller mill 3, after being crushed by the roller mill 3, the raw materials enter a combined type powder concentrator 5 through a second lifting machine 4, fine materials separated by the combined type powder concentrator 5 enter a cyclone cylinder 6, coarse materials return to the roller mill 3 to be crushed again, the fine materials are collected by the cyclone cylinder 6 and then conveyed to a self-separation type ball mill 7, after further grinding and separation, separated finished products enter a dust collector 8, and separated coarse materials return to a grinding bin 20 to enter the next circulation; finished products are collected by the dust collector 8 and conveyed to a finished product bin for storage, and waste gas discharged from the dust collector 8 is discharged into a chimney through the fan 9 and finally into the atmosphere.
The raw materials entering the ball mill of the system are preferably suitable for materials with the particle size of less than 0.5mm, and the ball mill can carry out superfine processing or particle shaping on pre-ground product particles in a secondary grinding process, such as processing of superfine steel slag micropowder.
Example 3
Referring to fig. 3 to 7, the self-classifying ball mill of the two systems of the embodiment 1 and the embodiment 2 includes a cylinder 10, a feeding port 101, and a discharging port 102, wherein the cylinder 10 is inclined upward from the feeding port 101 side to the discharging port 102 side at an angle of 2 to 5 °; the barrel 10 is driven to rotate by a mill drive (the mill drive is not shown in the figure, and the barrel 10 can be driven to rotate by a gear transmission or other modes), and a grinding bin 20 and a powder selecting bin 30 are arranged in the barrel 10 from a feeding hole 101 to a discharging hole 102 in sequence.
The inner wall of the cylinder body 10 of the grinding bin 20 is provided with a grinding lining plate 201, and the grinding lining plate 201 is parallel to the axis of the cylinder body 10; the activation rings 202 are arranged in the grinding bin 20, so that the material retention time can be increased, the material grinding time can be prolonged, the specific structures of the activation rings 202 can be selected according to needs, and only one of the activation rings is illustrated in the embodiment. The grinding bin 20 is 1 bin or a plurality of bins, and when a plurality of bins are adopted, a bin separating plate is arranged between the bins.
An inclined lining plate 301 is arranged on the inner wall of the barrel 10 of the powder selecting bin 30, the inner diameter of the inclined lining plate 301 is gradually reduced from the feeding end of the powder selecting bin 30 to the discharging end of the powder selecting bin 30, and the included angle between the inclined lining plate 301 and the axis of the barrel 10 is 3-15 degrees. The powder selecting bin 30 is internally provided with a dynamic powder selecting machine 310, the dynamic powder selecting machine 310 consists of a rotor 311, an impact cone 312, a transmission shaft 313 and a powder selecting machine drive 314, blades of the rotor 311 are parallel to the inclined lining plate 301, the impact cone 312 is fixed at one end of the rotor 311 close to the feeding side, the diameter of the impact cone 312 is the same as the outer diameter of the rotor 311, and the impact cone 312 is used for controlling the speed of a material entering the dynamic powder selecting machine 310 and reducing the impact of the material on the blades of the dynamic powder selecting machine 310; secondly, if the bottom adopts the blind plate structure, the materials and the gas impact on the dynamic powder concentrator 310 at 90 degrees, and the gas has no guiding function when entering the blades of the dynamic powder concentrator 310, so that the general wind resistance is large. The rotor 311 is connected with a powder concentrator drive 314 outside the powder concentrator 30 through a transmission shaft 313, specifically, the powder concentrator drive 314 comprises a speed reducer and a motor, and the transmission shaft 313 is connected with the motor through the speed reducer.
A main partition board 40 is arranged between the grinding bin 20 and the powder selecting bin 30, and the thickness of the main partition board 40 is 20-60 mm. The main partition board 40 is provided with a vent 401 positioned in the central area and grate gaps 402 positioned on the periphery, the center of the vent 401 is coaxial with the mill cylinder 10, the diameter of the vent 401 is 0.2-0.4 times of that of the mill cylinder 10, the vent 401 is of a net structure, and the effective size of meshes is 10-15 mm; the grate gap 402 close to the periphery of the vent 401 is a conical grate gap, the diameter of the grate gap 402 is gradually increased from the grinding bin 20 side to the powder selecting bin 30 side, the diameter of the grate gap 402 close to the grinding bin 20 side is 4-10 mm, and the diameter of the grate gap 402 close to the powder selecting bin 30 side is 6-12 mm; the slots 402 near the edge of the main partition 40 are elongated and have a dimension of 25mm in length and 4mm in width.
The included angle between the feed inlet 101 and the axis of the cylinder body 10 is larger than 45 degrees, an external fixing structure is adopted, and the feed inlet does not rotate along with the cylinder body 10.
The material-preventing device 50 is arranged at the discharge end of the feed inlet 101, the material-preventing device 50 is mounted on a cylinder 10 of the ball mill and consists of a conical telescopic steel sheet 501, a light spring 502 and a lifting plate 503, the conical telescopic steel sheet 501 is positioned at the inner side of the lifting plate 503, the large-diameter end of the conical telescopic steel sheet 501 is fixed on the lifting plate 503, and the small-diameter end is connected with the lifting plate 503 through the light springs 502; the conical telescopic steel sheet 501 is formed by sequentially stacking a plurality of baffle pieces 5011, and each baffle piece 5011 corresponds to one light spring 502; the cross sections of the conical telescopic steel sheet 501 and the material raising plate 503 are both circular. The length of the material raising plate 503 is 1.2-1.5 times of the horizontal length of the tapered telescopic steel sheet 501. When the material amount is large, the light spring 502 is compressed, each baffle 5011 of the conical telescopic steel sheet 501 can be unfolded to increase the diameter of the small-diameter end, the material passing area of the material scour prevention device 50 is increased, the material is ensured to pass through smoothly, the problem of uneven impact load is solved, the material is uniformly distributed in the ball mill, and the grinding efficiency of the ball mill is improved; when the material amount is small, the light spring 502 returns to the original position, the material passing area of the material stopper 50 is reduced, and the material in the barrel 10 is ensured not to return to the feed inlet 101.
The materials pass through the material preventing device 50 from the feeding hole 101 to enter the grinding bin 20 and enter the powder selecting bin 30 from the grinding bin 20, and the materials are sorted inside and outside the powder selecting bin 30; the sorted finished products are discharged from the discharge port 102 through the dynamic powder sorting machine 310, enter the next process, and the sorted non-finished products return to the grinding bin 20 again to be ground again under the action of gravity and centrifugal force, and enter the next circulation. The self-sorting ball mill can reduce the over-grinding of the ball mill, reduce fine powder agglomeration or ball pasting, improve the grinding efficiency, reduce the power consumption of grinding, reduce the height of a factory building, save the investment cost and be beneficial to energy conservation and environmental protection.
Example 4
Referring to fig. 8 to 10, different from embodiment 3, a static powder concentrator 320 is further disposed in the powder concentrator 30 of this embodiment, and the static powder concentrator 320 is located between the main partition plate 40 and the dynamic powder concentrator 310.
The static powder concentrator 320 comprises static blades 321, the static blades 321 are arranged in a conical shape, the included angle between the static blades 321 and the axis of the barrel 10 is 45-65 degrees, the diameter of the conical section of each static blade 321 is gradually increased from the grinding bin 20 side to the powder concentration bin 30 side, one end, close to the grinding bin 20, of each static blade 321 is fixed on the main bin partition plate 40, the other end of each static blade 321 is fixed on the barrel 10, specifically, the other end of each static blade is fixed on the inclined lining plate 301 in the powder concentration bin 30, and the connection positions of the static blades 321 and the barrel 10 are connected in a welding mode. The length of the static blades 321 in the axial direction accounts for 15-25% of the length of the powder selecting bin 30, the width of each static blade 321 is 50-300 mm, and the gap between every two adjacent static blades 321 is 50-400 mm.
At this time, the inner region where the main partition plate 40 and the tapered static blades 321 intersect is a blind plate, the vent holes 401 are not provided, the outer region is provided with a grid gap, and the structure of the grid gap is the same as the structure of the grid gap 402 on the main partition plate 40 in embodiment 1.
After the materials enter the powder selecting bin 30 from the grinding bin 20, first powder selection is carried out on the conical static blades 321, then the fine powder passing through the static blades 321 is subjected to second selection through the dynamic powder selecting machine 310, the products after the second selection are finished products, and the semi-coarse powder not passing through the rotor 311 returns to the grinding bin 20 again to enter the next circulation.
Example 5
Referring to fig. 11 to 13, unlike embodiment 3, the powder selecting bin 30 of this embodiment is not provided with the dynamic powder selecting machine 310, but only provided with the static powder selecting machine 320. The ratio of the length of the powder selecting bin 30 to the length of the whole ball mill cylinder 10 is 15-40%.
The static blades 321 of the static powder concentrator 320 are arranged parallel to the axis of the barrel 10, one end of the static blade 321 close to the grinding bin 20 is fixed on the main partition board 40, the other end of the static blade 321 is fixed on the barrel 10, the connection positions are all connected in a welding mode, and the static blade 321 occupies the whole powder concentrating bin 30. Each static blade 321 has a width of 50-300 mm, and a gap between two adjacent static blades 321 is 100-400 mm. The static blades 321 rotate along with the cylinder 10 to perform the function of coarse screening of materials.
At this time, the inner region where the main partition panel 40 and the static blades 321 intersect is a blind plate, and the outer region is provided with a grid seam, which is a long-strip grid seam.
In this embodiment, only the static powder concentrator 320 is provided, so that the whole ball mill can be arranged in a symmetrical structure, and materials can be fed from two ends of the ball mill and discharged from the middle of the ball mill.
In addition, the static vanes 321 of the static powder concentrator 320 in this embodiment may also be provided in a conical arrangement.
The materials respectively pass through the material guards 50 from the material inlets 101 at the two ends and enter the corresponding grinding bins 20, and the ground materials enter the powder selecting bin 30 along with the airflow; the static blades 321 in the powder selecting bin 30 are horizontally arranged, the fine materials after being selected enter finished products along with airflow and are discharged from the discharge port 102, and the coarse materials return to the grinding bin 20 and enter the next cycle until the finished products are obtained. The present embodiment further provides a dust collecting opening 103 above the discharging opening 102 for collecting dust.
The self-sorting ball mill of the embodiment is suitable for materials with the water content of grinding raw materials less than 2% and the granularity of ground products more than 80 mu m, can be used for processing materials such as machine-made sand in the field of building materials, and can also be used for producing medium and fine ores in the field of mineral separation.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the technical solutions described in the foregoing embodiments, or some or all of the technical features may be equivalently replaced, and the modifications or the replacements may not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A self-sorting ball milling system for grinding superfine materials is characterized by comprising a raw material bin, a self-sorting ball mill, a dust collector and a fan, wherein an outlet of the raw material bin is connected with a feed inlet of the self-sorting ball mill, a discharge outlet of the self-sorting ball mill is connected with an inlet of the dust collector, and an air outlet of the dust collector is connected with the fan;
the self-sorting ball mill comprises a barrel, a feeding hole and a discharging hole, wherein the barrel inclines upwards from the side of the feeding hole to the side of the discharging hole, and the inclination angle is 2-5 degrees; a grinding bin and a powder selecting bin are sequentially arranged in the barrel from a feeding hole to a discharging hole, and a main partition board is arranged between the grinding bin and the powder selecting bin; and a static powder concentrator and/or a dynamic powder concentrator are arranged in the powder concentration bin.
2. The self-separation ball milling system for grinding ultrafine materials according to claim 1, further comprising a roller mill, a combined type powder concentrator and a cyclone, wherein the raw material bin outlet is connected with the roller mill feeding port, the roller mill discharging port is connected with the combined type powder concentrator feeding port through a hoister, the combined type powder concentrator feeding port is connected with the cyclone inlet, and the cyclone bottom discharging port is connected with the self-separation ball mill feeding port.
3. The self-sorting ball milling system for grinding ultrafine materials according to claim 1, wherein an inclined lining plate is arranged on the inner wall of the barrel of the powder sorting bin, and the inclined lining plate forms an included angle of 3-15 degrees with the axis of the barrel.
4. The self-sorting ball mill according to claim 1, wherein the dynamic powder concentrator is composed of a rotor, an impact cone, a transmission shaft and a powder concentrator, wherein blades of the rotor are parallel to an inclined lining plate in the powder concentrator, the impact cone is fixed at one end of the rotor close to a feeding side, and the diameter of the impact cone is the same as the outer diameter of the rotor; the rotor is connected with the powder concentrator through a transmission shaft for driving.
5. The self-sorting ball mill according to claim 1, wherein when only a dynamic powder concentrator is disposed in the powder concentrator, the main partition plate is provided with a vent hole located in a central region and grate gaps located at the periphery, the center of the vent hole is coaxial with the mill cylinder, and the vent hole is of a net structure; the grate gaps close to the periphery of the vent holes are conical grate gaps, and the diameter of the grate gaps is gradually increased from the grinding bin side to the powder selecting bin side; the grate seam close to the edge area of the main compartment plate is a strip-shaped grate seam.
6. The self-classifying ball mill according to claim 1, characterized in that when a static powder concentrator and a dynamic powder concentrator are provided in the powder concentrator, the static blades of the static powder concentrator are arranged in a cone shape, and the static powder concentrator is located between the main partition plate and the dynamic powder concentrator.
7. The self-classifying ball mill according to claim 1, characterized in that the static powder concentrator comprises static blades which are arranged conically or parallel to the cylinder axis;
when the static blades are arranged in a conical shape, the included angle between the static blades and the axis of the barrel is 45-65 degrees, the diameter of the section of the cone of the static blades is gradually increased from the grinding bin side to the powder selecting bin side, one end, close to the grinding bin, of each static blade is fixed on the main partition board, and the other end of each static blade is fixed on the barrel; at the moment, the inner region where the main partition plate and the conical static blades are intersected is a blind plate, and the outer region is provided with a grid seam;
when the static blades are arranged in parallel with the axis of the cylinder body, one end of each static blade close to the grinding bin is fixed on the main bin partition plate, and the other end of each static blade is fixed on the cylinder body; at the moment, the inner area of the intersection of the main partition board and the static blades is a blind plate, and the outer area is provided with a grid seam.
8. The self-sorting ball milling system for ultra-fine material grinding according to claim 1, wherein a grinding lining plate is disposed on the inner wall of the barrel of the grinding bin, and a plurality of activation rings are disposed in the grinding bin.
9. The self-sorting ball mill according to claim 1, wherein the feed inlet and the cylinder axis have an included angle of more than 45 degrees, and an external fixed structure is adopted and does not rotate along with the cylinder.
10. The self-sorting ball mill according to claim 1, wherein a material impact prevention device is arranged at the discharge end of the feed inlet, the material impact prevention device is composed of a conical telescopic steel sheet, a light spring and a material lifting plate, the conical telescopic steel sheet is positioned at the inner side of the material lifting plate, the large diameter end of the conical telescopic steel sheet is fixed on the material lifting plate, and the small diameter end is connected with the material lifting plate through the light springs; the conical telescopic steel sheet is formed by sequentially stacking and enclosing a plurality of baffle plates, and each baffle plate corresponds to one light spring; the length of the lifting plate is greater than that of the tapered telescopic steel sheet.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115780031A (en) * | 2023-02-06 | 2023-03-14 | 山东埃尔派粉体科技有限公司 | Processing method of petroleum coke micro powder for lithium battery negative electrode material |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3712549A (en) * | 1970-01-06 | 1973-01-23 | Smidth & Co As F L | Grinding raw materials in the manufacture of cement |
| CN200942348Y (en) * | 2006-05-18 | 2007-09-05 | 江苏双龙集团有限公司龙潭重型机械厂 | Feeding device for wet ball mill |
| CN202277861U (en) * | 2011-10-17 | 2012-06-20 | 江苏金牛铸钢件有限公司 | Efficient internal powder selecting device of globe mill |
| CN103041906A (en) * | 2013-01-03 | 2013-04-17 | 湖南三泓建材有限公司 | Slag micropowder grinding system and technology |
| CN203184082U (en) * | 2013-03-21 | 2013-09-11 | 中建材（合肥）粉体科技装备有限公司 | Crushing ball mill with mill-tail powder selecting function |
| CN104437765A (en) * | 2014-12-08 | 2015-03-25 | 宁夏锦绣实业有限公司 | Special mill for ultrafine fly ash |
| CN207478759U (en) * | 2017-11-02 | 2018-06-12 | 江苏吉能达环境能源科技有限公司 | A kind of multilevel grinding superfine powder production-process systems |
| CN108405089A (en) * | 2018-03-10 | 2018-08-17 | 洛阳晟源新材料有限公司 | A kind of continuous feed pneumatic separation device |
| CN109158316A (en) * | 2018-09-07 | 2019-01-08 | 天津水泥工业设计研究院有限公司 | A kind of compact combination formula powder concentrator for bed-grinding system |
-
2021
- 2021-10-18 CN CN202111208943.XA patent/CN113953062B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3712549A (en) * | 1970-01-06 | 1973-01-23 | Smidth & Co As F L | Grinding raw materials in the manufacture of cement |
| CN200942348Y (en) * | 2006-05-18 | 2007-09-05 | 江苏双龙集团有限公司龙潭重型机械厂 | Feeding device for wet ball mill |
| CN202277861U (en) * | 2011-10-17 | 2012-06-20 | 江苏金牛铸钢件有限公司 | Efficient internal powder selecting device of globe mill |
| CN103041906A (en) * | 2013-01-03 | 2013-04-17 | 湖南三泓建材有限公司 | Slag micropowder grinding system and technology |
| CN203184082U (en) * | 2013-03-21 | 2013-09-11 | 中建材（合肥）粉体科技装备有限公司 | Crushing ball mill with mill-tail powder selecting function |
| CN104437765A (en) * | 2014-12-08 | 2015-03-25 | 宁夏锦绣实业有限公司 | Special mill for ultrafine fly ash |
| CN207478759U (en) * | 2017-11-02 | 2018-06-12 | 江苏吉能达环境能源科技有限公司 | A kind of multilevel grinding superfine powder production-process systems |
| CN108405089A (en) * | 2018-03-10 | 2018-08-17 | 洛阳晟源新材料有限公司 | A kind of continuous feed pneumatic separation device |
| CN109158316A (en) * | 2018-09-07 | 2019-01-08 | 天津水泥工业设计研究院有限公司 | A kind of compact combination formula powder concentrator for bed-grinding system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115780031A (en) * | 2023-02-06 | 2023-03-14 | 山东埃尔派粉体科技有限公司 | Processing method of petroleum coke micro powder for lithium battery negative electrode material |
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| CN113953062B (en) | 2023-04-14 |
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