CN110449226B - Cement clinker grinding implementation equipment and stirring device thereof - Google Patents
Cement clinker grinding implementation equipment and stirring device thereof Download PDFInfo
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- CN110449226B CN110449226B CN201910686602.XA CN201910686602A CN110449226B CN 110449226 B CN110449226 B CN 110449226B CN 201910686602 A CN201910686602 A CN 201910686602A CN 110449226 B CN110449226 B CN 110449226B
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- 238000003756 stirring Methods 0.000 title claims abstract description 405
- 238000000227 grinding Methods 0.000 title claims abstract description 153
- 239000004568 cement Substances 0.000 title claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 76
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 54
- 230000033001 locomotion Effects 0.000 claims abstract description 20
- 238000012216 screening Methods 0.000 claims abstract description 19
- 238000009837 dry grinding Methods 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims description 21
- 239000000956 alloy Substances 0.000 claims description 10
- 229910045601 alloy Inorganic materials 0.000 claims description 10
- 238000000926 separation method Methods 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 5
- 239000004677 Nylon Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 238000011049 filling Methods 0.000 abstract description 10
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 13
- 239000012530 fluid Substances 0.000 description 7
- 238000001035 drying Methods 0.000 description 5
- 238000007873 sieving Methods 0.000 description 5
- 238000000498 ball milling Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000001238 wet grinding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910052602 gypsum Inorganic materials 0.000 description 2
- 239000010440 gypsum Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/83—Mixing plants specially adapted for mixing in combination with disintegrating operations
- B01F33/8305—Devices with one shaft, provided with mixing and milling tools, e.g. using balls or rollers as working tools; Devices with two or more tools rotating about the same axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/80—Mixing plants; Combinations of mixers
- B01F33/836—Mixing plants; Combinations of mixers combining mixing with other treatments
- B01F33/8361—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating
- B01F33/83613—Mixing plants; Combinations of mixers combining mixing with other treatments with disintegrating by grinding or milling
-
- 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
-
- 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
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
-
- 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
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
- B02C17/163—Stirring means
-
- 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
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
- B02C2017/165—Mills in which a fixed container houses stirring means tumbling the charge with stirring means comprising more than one agitator
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses cement clinker grinding implementation equipment, and relates to the technical field of grinding devices. The invention comprises a shell, a rotatable stirring shaft inserted into a stirring cavity of the shell, a stirring unit arranged on the stirring shaft, a screening device for separating the stirring cavity from a discharge hole and a reinforcing stirring piece extending in a sub-grinding zone, wherein the reinforcing stirring piece is configured to cooperate with the stirring unit to enable at least part of grinding media and materials in the sub-grinding zone to perform grinding motion along the circumferential direction of the stirring shaft. The cement clinker grinding implementation equipment can carry out dry grinding under the conditions of high filling rate and high rotating speed, effectively eliminates dead material areas, and greatly reduces energy consumption under the conditions of grinding of equal-magnitude materials.
Description
Technical Field
The invention relates to the technical field of grinding devices, in particular to cement clinker grinding implementation equipment and a stirring device thereof.
Background
The high-energy ball mill is core equipment of crushing and grinding processes, and the drum-type ball mill mainly used in industry has large processing capacity, but has critical rotating speed and small collision energy during ball milling. The stirring ball mill cylinder is fixed, the stirrer rotates at high speed along with the main shaft, and the grinding media in the cylinder are driven to move together under the action of friction force and centrifugal force, so that violent and frequent collision, shearing and friction actions occur between the media and the wall surface, and the materials are broken and dissociated. The stirring ball mill has no rotation speed limitation in principle, and collision energy can reach a large value during ball milling, so that high energy density input is realized.
The agitator ball mill can be divided into a vertical type ball mill and a horizontal type ball mill according to the installation mode of an agitator shaft, and can be divided into a dry type ball mill and a wet type ball mill according to the grinding process. Compared with the vertical stirring shaft, the vertical stirring shaft is installed in a hanging manner, and the stirring shaft is subjected to dynamic impact in the ball milling process, so that the stirring shaft swings too much and works for a long time, and the phenomenon of machine clamping and bearing sealing failure are easy to occur. Compared with the wet method, the dry method has the advantages of complex production process flow, subsequent dehydration and drying treatment, and long finished product manufacturing period.
According to a stirred ball mill for grinding dry or non-dry materials disclosed in chinese patent No. CN103567028B, a grinding vessel is provided, a stirring shaft extends at or near the center of the grinding vessel, and a plurality of grinding elements are provided on the stirring shaft. The agitator ball mill is provided with a fluid channel in the centre of the agitator shaft, by means of which fluid channel the fluid is introduced in the vicinity of the space of the last grinding element connected upstream of the outlet area, the fluid moving in the grinding vessel at a speed of 0-50 m/s. The stirring type ball mill is mainly suitable for wet grinding, and the material flows radially pass through a separation device so as to separate materials and grinding media, and the materials are easily accumulated at the separation device. Fluid is sprayed into the grinding container through the discharge hole arranged on the upstream of the outlet area of the stirring shaft, materials flow through the upstream of the outlet area, the separating device and the outlet, the flow of conveying medium in the grinding container is optimized, the problem of blocking is solved, and the energy consumption is high.
According to a method of operating a stirred ball mill and a stirred ball mill for performing the method disclosed in chinese patent No. CN104053506a, the separation system comprises a stationary screen having a free pore surface configured such that the gas passing through the separation system and the product outlet from the stirred mill has a velocity of about 10m/s to 30m/s, preferably 15m/s to 25m/s. The stirring ball mill is also mainly suitable for wet grinding, and drives a viscous material flow to perform grinding motion by virtue of rotation of a stirring shaft, so that grinding of materials is performed at a high filling rate and a high rotating speed. The discharge hole of the stirring ball mill is arranged at the center of the end part of the cylinder body, and the material is discharged in a wind-sweeping manner, so that the normal discharge of the material is also not facilitated, and the energy consumption is higher.
According to the horizontal dry type internal grading stirring mill disclosed in the Chinese patent No. 202447150U, the horizontal type dry type internal grading stirring mill comprises a cylinder body, a stirring shaft, a driving system, a feeding air lock, an air cooling system, a grading system and a machine base, wherein the stirring shaft is arranged in the cylinder body, the end part of the stirring shaft is connected with the driving system, the cylinder body is arranged on the machine base, the feeding air lock is arranged at the upper part of one end of the cylinder body and is connected with a feeding hole, the air cooling device is arranged in the cylinder body, and the grading system is arranged on a discharging hole at the upper part of the cylinder body. The feeding port of the horizontal dry type internal grading stirring mill is arranged at the upper part of the cylinder body, which is not beneficial to normal feeding under high rotation speed and high filling rate; the stirring shaft consists of a main shaft and a stirring disc or a blade, a dead material area is easy to appear, particularly, under the condition that the filling rate is higher than 32%, grinding media and materials are accumulated in the cylinder, the stirring disc or the blade idles, and the grinding media and the materials cannot perform effective grinding movement.
In wet grinding, grinding media and materials form a material flow with certain viscosity, and the material flow with viscosity is very easy to be brought up by a stirrer to perform grinding motion in a stirring cavity; in dry grinding, however, the flow of the dry grinding medium and the material, in particular the flow in the lower part of the mixing chamber, is prone to stagnation and to dead zones. Under the condition of low rotation speed and low filling rate, the dead material area generated by the horizontal dry grinding is relatively less, but under the condition of high filling rate and high rotation speed, the stirrer can have serious idling problem, and the grinding work can not be normally performed.
Disclosure of Invention
The invention aims at: aiming at the problem that the existing horizontal ball mill is not suitable for dry grinding of cement clinker, and particularly the problem that the existing horizontal ball mill has a large number of dead material areas under the condition of high filling and high rotating speed, the invention provides cement clinker grinding implementation equipment which can perform dry grinding under the condition of high filling rate and high rotating speed, effectively eliminate the dead material areas and greatly reduce energy consumption under the condition of grinding of equal-magnitude materials.
The technical scheme adopted by the invention is as follows:
the stirring device comprises a stirring shaft capable of being driven to rotate by a driving system, and at least one stirring unit arranged on the axial direction of the stirring shaft, wherein sub-grinding areas are formed on two sides of the stirring unit along the axial direction of the stirring shaft, at least one reinforcing stirring piece is connected with the stirring unit, and the reinforcing stirring piece extends in the sub-grinding areas so that at least part of grinding media and materials in the sub-grinding areas perform grinding motion along the circumferential direction of the stirring shaft.
Further, the reinforcing stirring pieces are arranged at intervals in the circumferential direction of the stirring unit; at least two adjacent stirring units are connected with each other through a reinforcing stirring piece and form a cage stirring group.
Further, the stirring unit protrudes along the radial direction of the stirring shaft; at least two stirring units are axially arranged at intervals on the stirring shaft.
Further, the stirring unit is provided with at least one flow-through aperture configured to allow at least part of the grinding media and material to flow between the sub-grinding zones in a direction parallel to the axial direction of the stirring shaft.
Further, at least one of the reinforcing stirring pieces is in a rod-shaped structure; the reinforced stirring piece is at least one of a first stirring piece and a second stirring piece, the extension line of the first stirring piece is parallel to the axis of the stirring shaft, and the extension line of the second stirring piece is different from the axis of the stirring shaft.
Further, at least one stirring unit is a disc-shaped blade; and/or at least one stirring unit is a helical blade.
Further, the stirring unit comprises at least two split blades which can be split or combined, and the at least two split blades are connected into a whole through bolts.
Further, the reinforced stirring piece and/or the stirring unit are/is made of wear-resistant alloy; the surface of the reinforced stirring piece and/or the stirring unit is provided with a composite wear-resistant material layer.
According to the cement clinker grinding implementation equipment disclosed by the invention, the cement clinker grinding implementation equipment is used for dry grinding of cement clinker and comprises the following components: a housing including a wall defining a horizontally extending stir chamber, and a feed port and a discharge port communicating with the stir chamber; the stirring device comprises a stirring shaft extending into the stirring cavity and at least one stirring unit arranged on the stirring shaft; screening device for separating stirring cavity and discharge hole; wherein, the two sides of the stirring unit along the axial direction of the stirring shaft form a sub-grinding area, and at least one reinforcing stirring piece is arranged in the sub-grinding area; the enhanced stirring piece extends in the sub-grinding zone and is matched with the stirring unit so as to enable at least part of grinding media and materials in the sub-grinding zone to perform grinding motion along the circumferential direction of the stirring shaft.
Further, the reinforced stirring piece is connected with the stirring unit, and the stirring unit and the shell rotate relatively; or, the reinforcing stirring piece is connected with the shell, the shell rotates, and the stirring unit and the shell rotate relatively.
Further, in the case where the reinforcing stirring members are connected to the stirring unit, the reinforcing stirring members are arranged at intervals in the circumferential direction of the stirring unit; at least two adjacent stirring units are connected with each other through a reinforcing stirring piece and form a cage stirring group. Preferably, at least one of the reinforcing stirring members has a rod-like structure; the reinforced stirring piece is at least one of a first stirring piece and a second stirring piece, the extension line of the first stirring piece is parallel to the axis of the stirring shaft, and the extension line of the second stirring piece is different from the axis of the stirring shaft.
Further, the stirring unit protrudes along the radial direction of the stirring shaft; at least two stirring units are axially arranged at intervals on the stirring shaft.
Further, the stirring unit is provided with at least one flow-through aperture configured to allow at least part of the grinding media and material to flow between the sub-grinding zones in a direction parallel to the axial direction of the stirring shaft.
Further, at least one stirring unit is a disc-shaped blade; and/or at least one stirring unit is a helical blade.
Further, the stirring unit comprises at least two split blades which can be split or combined, and the at least two split blades are connected into a whole through bolts.
Further, the reinforced stirring piece and/or the stirring unit are/is made of wear-resistant alloy; the surface of the reinforced stirring piece and/or the stirring unit is provided with a composite wear-resistant material layer.
Further, a gap is arranged between the wall and the stirring unit, and the ratio of the width of the gap to the diameter of the grinding medium is more than 3; the wall forms a circular empty area at the periphery of the stirring unit, and the sub-grinding area drives the circular empty area to perform grinding motion.
Further, the cross section of the stirring cavity is at least one of round, oval and polygonal.
Further, a wear-resistant lining is arranged on the inner side of the wall, and the wear-resistant lining is made of at least one material selected from wear-resistant alloy, ceramic, nylon and polyurethane.
Further, a cooling device is arranged outside the shell; the cooling device comprises a circulating cooling layer and/or cooling fins.
Further, the feed inlet is arranged on the end part of the shell, and the feed inlet is matched with a cavity area at the periphery of the stirring shaft for feeding.
Further, the screening device is divided between the stirring cavity and the discharge port to form an overflow cavity for gas-solid separation; the ground materials in the overflow cavity are settled to a discharge hole under the action of the combined force of self gravity and the wind force of the conveying airflow and are separated from the conveying airflow.
Further, the ground material is separated from the grinding media by a screening device; the screening device comprises at least a stationary screening deck mounted in the housing, the screening deck having a screening diameter smaller than the diameter of the grinding media.
In summary, due to the adoption of the technical scheme, the beneficial effects of the invention are as follows: by arranging the reinforced stirring pieces in the sub-grinding areas at two sides of the stirring units, part or all of grinding media and materials between adjacent stirring units or between the stirring units and the end walls at two sides collide and impact with the reinforced stirring pieces and lift up towards the upper part of the stirring cavity, so that the grinding media are caused to circularly move, autorotate move and the like, and further the grinding media between the stirring units and the inner wall of the stirring cavity are driven to grind, and dead material areas are eliminated; the materials dispersed between the grinding media can be ground into fine particles only by the action of intense impact, friction, shearing and the like generated between the grinding media and the inner wall of the stirring cavity. The cement clinker grinding implementation equipment has small starting moment, can efficiently perform dry grinding of the cement clinker under the working conditions that the rotating speed is more than 3 times higher than the critical rotating speed and the filling rate of grinding media is more than 70 percent, improves the productivity and greatly reduces the energy consumption.
Drawings
FIG. 1 is a cross-sectional view of a first embodiment of a cement clinker grinding implementation of the invention;
FIG. 2 is an enlarged partial schematic view of the invention of FIG. 1A;
FIG. 3 is a cross-sectional view of a second embodiment of the cement clinker grinding embodiment of the invention;
FIG. 4 is a cross-sectional view of a third embodiment of the cement clinker grinding embodiment of the invention;
FIG. 5 is a cross-sectional view of a fourth embodiment of the cement clinker grinding embodiment of the invention;
the marks in the figure: 100-cement clinker grinding implementation equipment; 110-a housing; 120-stirring shaft; 130-a stirring unit; 140-reinforcing stirring piece; 150-a drive system; 160-screening device; 170-a cooling device; 111-a stirring cavity; 112-a feed inlet; 113-a discharge port; 114-an air inlet; 115-an air outlet; 116-an overflow chamber; 131-disc-shaped blades; 132-helical blades; m, N-terminal; f-delivering a gas stream; s-a sub-grinding zone; r-ring empty region.
Detailed Description
All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.
Any feature disclosed in this specification (including any accompanying claims, abstract) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
Example 1
Referring to fig. 1, a stirring device of cement clinker grinding implementing apparatus 100 according to the present embodiment is described, which includes a stirring shaft 120, a stirring unit 130 and a reinforcing stirring member 140, wherein the stirring unit 130 is mounted on the stirring shaft 120, the stirring unit 130 is preferably connected to the stirring shaft 120 by a key or a bolt, the reinforcing stirring member 140 is mounted on the stirring unit 130, and the number of the stirring unit 130 and the reinforcing stirring member 140 is at least one. When the number of the stirring units 130 is greater than 1, the stirring units 130 are sequentially arranged in the axial direction of the stirring shaft 120.
When the stirring shaft 120 rotates, the stirring unit 130 rotates together with the stirring shaft 120. The stirring unit 130 protrudes radially from the stirring shaft 120 along the stirring shaft 120, and is a main functional element for grinding. In the first embodiment of the stirring unit 130, as shown in fig. 1 and 3, at least one stirring unit 130 is a disc-shaped blade 131, and at least one stirring unit 130 is a spiral blade 132, that is, at least two structures of stirring units 130 exist in the stirring cavity 111; the plurality of stirring units 130 are axially and alternately arranged along the stirring shaft 120, and the layout of different stirring units 130 is adjusted according to the requirements of the grinding process. In the second embodiment of the stirring unit 130, as shown in fig. 4, the stirring units 130 disposed on the stirring shaft 120 are all disc-shaped blades 131, and the disc-shaped blades 131 are axially spaced along the stirring shaft 120. In a third embodiment of the stirring unit 130, the stirring shaft 120 is provided with the stirring unit 130, wherein the stirring units 130 are helical blades 132, and the helical blades 132 are sequentially connected end to end. The shape and layout of the stirring unit 130 can be adjusted according to the requirements of the pulverizing process, and are not limited to the above-described exemplary embodiments.
The sub-grinding sections S are formed at both sides of the stirring unit 130 in the axial direction of the stirring shaft 120. Specifically, when the stirring shaft 120 is axially provided with one stirring unit 130, a sub-grinding area S is formed between the stirring unit 130 and the end wall of the adjacent stirring cavity 111; when a plurality of stirring units 130 are axially provided on the stirring shaft 120, a sub-grinding region S is formed between adjacent stirring units 130 and between the stirring units 130 and the end walls of the adjacent stirring chambers 111. In practice, the applicant has found that the sub-grinding zone S in the lower middle part of the mixing chamber 111 of the cement clinker grinding implementing assembly 100 is very susceptible to becoming a dead zone, resulting in idle and ineffective grinding of the mixing unit 130. In this embodiment, the reinforced stirring member 140 connected to the stirring unit 130 extends in the sub-grinding area S, and when the stirring unit 130 rotates together with the stirring shaft 120, the reinforced stirring member 140 and the stirring unit 130 cooperate to make at least part of the grinding media and materials in the corresponding sub-grinding area S impact and collide with the reinforced stirring member 140, and the part of the grinding media and materials are lifted up to the upper part of the stirring cavity 111 and perform grinding motion under the driving of the reinforced stirring member 140 and the stirring unit 130.
As a main functional element of the grinding motion, the stirring unit 130 generally has a short service life and needs to be replaced in time. In this embodiment, the stirring unit 130 is in a split structure, and the stirring unit 130 is formed by combining two or more split blades which can be split or combined through bolts or other connection modes, so that the difficulty and cost for replacing the stirring unit 130 are reduced. In order to prolong the service life of the stirring unit 130, the stirring unit 130 may be made of a wear-resistant alloy or a material with higher strength than the wear-resistant alloy, and optionally, a composite wear-resistant material layer may be disposed on the surface of the stirring unit 130.
In the present embodiment, the reinforcing stirring members 140 are arranged at intervals in the circumferential direction of the stirring unit 130, that is, a plurality of reinforcing stirring members 140 provided on the same stirring unit 130 are arranged at intervals in the direction around the axis of the stirring shaft 120. In a first specific arrangement of the reinforcing stirring members 140, two or more adjacent stirring units 130 may be connected to each other by the reinforcing stirring members 140 to form a cage stirring group, and a plurality of cage stirring groups may be disposed on the stirring shaft 120 at intervals. In a second specific arrangement of the reinforcing stirring members 140, adjacent stirring units 130 on the stirring shaft 120 are all interconnected by the reinforcing stirring members 140 to form an integrated cage stirring group. In a third specific arrangement of the reinforcing stirring member 140, the reinforcing stirring member 140 connected to the stirring unit 130 is not connected to the adjacent stirring unit 130. The first and third arrangements may be preferred to facilitate enhanced handling and maintenance replacement of the stirring member 140. The arrangement of the reinforcing stirring member 140 may be adjusted according to the requirements of the pulverizing process, and is not limited to the specific arrangement as exemplified above.
The reinforcing stirring member 140 shown in fig. 1 is in the form of a thin straight rod, and the extension line of the thin straight rod-like reinforcing stirring member 140 is parallel to the axis of the stirring shaft 120, i.e., the reinforcing stirring member 140 extends in a direction parallel to the axis of the stirring shaft 120. The reinforcing stirring member 140 shown in fig. 3 is also in a thin straight bar shape, and the extending line of the reinforcing stirring member 140 is out of plane with the axis of the stirring shaft 120, that is, the reinforcing stirring member 140 extends in a direction out of plane with the axis of the stirring shaft 120. In addition to the thin and straight rod shape, the reinforcing stirring member 140 may have a spiral rod shape, a flat plate shape, an arc plate shape, or the like, and is not limited to the above-exemplified case.
In this embodiment, when the adjacent stirring units 130 are not connected to each other by the reinforcing stirring members 140, as shown in fig. 2, a reserved gap is provided between two adjacent reinforcing stirring members 140 in the length direction (axial direction) of the stirring shaft 120, and the ratio of the width of the reserved gap to the diameter of the grinding medium is greater than 2.
As another major functional element of the grinding motion, the reinforcing stirring element 140 is also extremely susceptible to wear and tear, requiring timely replacement. In this embodiment, to prolong the service life of the stirring device, the reinforcing stirring member 140 may be made of a wear-resistant alloy or a material with strength higher than that of the wear-resistant alloy, and optionally, a composite wear-resistant material layer may be disposed on the surface of the reinforcing stirring member 140.
Example 2
Referring to fig. 1, a cement clinker grinding implementation apparatus 100 according to the present embodiment is described, which includes a housing 110, a screening device 160, and a stirring device, and includes a stirring shaft 120 capable of being rotated by a driving system 150, and at least one stirring unit 130 disposed in an axial direction of the stirring shaft 120, wherein sub-grinding areas S are formed on both sides of the stirring unit 130 along the axial direction of the stirring shaft 120, at least one reinforcing stirring member 140 is connected to the stirring unit 130, and the reinforcing stirring member 140 extends in the sub-grinding areas S, and the reinforcing stirring member 140 cooperates with the stirring unit 130 to perform grinding motion on at least part of grinding media and materials of the sub-grinding areas S along a circumferential direction of the stirring shaft 120. The housing 110 includes walls defining a horizontally extending stir chamber 111, and a feed port 112 and a discharge port 113 communicating with the stir chamber 111. The stirring device is arranged in the stirring cavity 111 and comprises a stirring shaft 120 and a stirring unit 130; a stirring shaft 120 arranged horizontally is at least partially inserted into the stirring chamber 111, and the stirring shaft 120 can be rotated by a driving system 150. Preferably, both ends of the stirring shaft 120 extend out of the housing 110 and are respectively mounted on the frame through support bearings. The stirring shaft 120 is provided with at least one stirring unit 130 along its axial direction. The stirring chamber 111 is filled with a grinding medium (not shown in the drawing) having a substantially spherical shape, and a material (not shown in the drawing) enters the stirring chamber 111 through the feed port 112, and the material and the grinding medium are mixed by the stirring device and the reinforcing stirring member 140 to form a flow. The collision, shearing, friction and the like between the grinding media and the inner wall of the stirring cavity 111 enable the materials to be ground step by step to form materials, and the materials are discharged through the discharge hole 113.
In this embodiment, the stirring device further comprises a reinforcing stirring member 140. The specific embodiment of the stirring device is determined by the stirring mode of the cement clinker grinding implementation equipment 100. The manner in which the cement clinker grinding apparatus 100 is stirred can be broadly divided into three types: a) The housing 110 is stationary and the stirring device rotates; b) The shell 110 rotates, and the stirring device rotates reversely with the shell 110; c) The housing 110 rotates and the stirring device rotates in the same direction as the housing 110 in a differential speed. In the condition of the stirring mode a, as shown in fig. 1, the reinforcing stirring member 140 of the stirring device and the reinforcing stirring member 140 of the stirring unit 130 may be connected to the stirring unit 130. In the condition of stirring mode b and stirring mode c, as shown in fig. 5, the reinforcing stirring member 140 may be attached to the housing 110; the reinforcing stirring member 140 may also be attached to the housing 110. Since the stirring mode a has low energy consumption and high grinding efficiency, and can be well adapted to the grinding operation at a high filling rate and a high rotation speed, the cement clinker grinding implementation apparatus 100 of the present embodiment preferably adopts the stirring device as described in embodiment 1 to be suitable for operating in the stirring mode a.
In this embodiment, the wall of the housing 110 surrounds the stirring device, and a gap is provided between the wall and the stirring blade of the stirring device, and the ratio of the width of the gap to the diameter of the grinding medium is greater than 3. The wall forms an annular space R around the stirring unit 130, and the sub-grinding area S drives the annular space R to perform grinding motion. Specifically, at least part of the grinding media and materials in the sub-grinding area S are driven by the stirring device to perform grinding motion along the axial direction of the stirring shaft 120, so as to further promote at least part of the grinding media and materials in the peripheral annular space area R of the stirring device to perform grinding motion.
To increase the service life of the housing 110, the cross section of the stirring chamber 111 may be at least one of circular, elliptical, and polygonal. It should be noted that the stirring cavity 111 with the oval and polygonal cross section can promote the material to form a material pad on the inner wall of the housing 110, so as to reduce the abrasion of the grinding medium and the material to the inner wall. Furthermore, the inner side of the wall is also provided with a wear-resistant lining which is made of at least one material selected from wear-resistant alloy, ceramic, nylon and polyurethane, and can be made of other wear-resistant materials according to the requirements of actual grinding technology, which are not listed here.
During the high-speed rotation of the stirring unit 130, the grinding media present a trend of wall-adhering movement, and a cavity area appears in the stirring cavity 111 in a range close to the stirring shaft 120, if the side wall of the shell 110 is provided with the feed inlet 112, the feed inlet 112 is blocked by material flow and cannot normally feed, and the grinding media and materials in the stirring cavity 111 can be thrown out of the stirring cavity 111 even through the feed inlet 112. In this embodiment, the housing 110 has two ends, the axis of the stirring shaft 120 passes through the two ends of the housing 110, and the feeding port 112 is disposed on one of the ends M of the housing 110, preferably, the feeding direction is aligned with the cavity region; the discharge port 113 is provided at a non-center position of the other end portion N of the housing 110 or on a side wall near the other end portion N. Preferably, to improve the stability of the stirring shaft 120, the inlet 112 is disposed at a non-central position of the end M of the housing 110; to further optimize the feed pattern, a sloped channel may be provided at the feed inlet 112.
To facilitate discharge, a screening device 160 is provided within the housing 110 that separates the stir chamber 111 from the discharge port 113. The screen openings of the screen 160 are smaller than the diameter of the grinding media so as to separate the material from the grinding media and prevent the grinding media from being discharged from the discharge port 113, so that the grinding media need only be added without replacement. As a transmission power source, a transport gas is introduced into the stirring chamber 111. The conveying air flow F is configured to convey the material through the screening device 160 toward the discharge outlet 113; preferably, the conveying airflow F drives the material to flow through the sieving device 160 in the stirring cavity 111 along the direction parallel to the axial direction of the stirring shaft 120, and the material passes through the sieving device 160 along the axial direction, so that the flow resistance of the conveying air is minimum, the energy consumption can be effectively reduced, the sieving device 160 can be in direct contact with the grinding medium moving at a high speed, and the problem of blocking at the sieving device 160 is effectively prevented.
In this embodiment, the conveying air flow F can dry and cool the material synchronously during the grinding process. On the one hand, the heat energy generated by the high-speed movement of the grinding medium and the material promotes the water loss in the material. On the other hand, the conveying air flow F passing through the agitating chamber 111 may be formed of a cooling air flow or a drying air flow, or may be formed by switching the cooling air flow and the drying air flow with each other. When the temperature in the stirring cavity 111 is too high, gypsum can be dehydrated into semi-hydrated gypsum, so that cement is pseudoset, the problems can be effectively avoided by introducing cooling air flow, and the cement clinker grinding implementation equipment 100 is maintained in a high-performance state; when the temperature in the stirring cavity 111 is low, drying of the material can be assisted by the drying air flow.
In this embodiment, the sieving device 160 is divided between the stirring chamber 111 and the discharge port 113 to form an overflow chamber 116 for gas-solid separation, and the overflow chamber 116 can be used as a buffer area for separating materials from the conveying airflow F. Since the discharge port 113 is arranged at a non-central position or on the side wall of the other end part N of the shell 110, the materials in the overflow cavity 116 can be settled to the discharge port 113 and separated from the conveying airflow F under the combined action of self gravity and the wind force of the conveying airflow F; preferably, the air outlet 115 of the shell 110 is separated from the discharge outlet 113, and a locking air valve is arranged at the discharge outlet 113; the air outlet 115 is connected with the flow cavity 116 and is positioned above the discharge outlet 113, and a height difference is arranged between the discharge outlet 113 and the air outlet 115. To further optimize the discharge pattern, an inclined channel is provided at the air outlet 115.
Because of the lack of fluid having viscosity such as water as a conveying medium, the material formed by the grinding motion in the sub-grinding zone S is difficult to flow to the discharge port 113 through the space between the stirring unit 130 and the inner wall of the stirring chamber 111, and the sub-grinding zone S is prone to the material overgrinding phenomenon. In this embodiment, the stirring unit 130 is provided with an overflow hole configured to allow the material to flow between the sub-grinding sections S in a direction parallel to the axial direction of the stirring shaft 120 and move toward the discharge port 113. On the other hand, the flow-through holes allow the conveying fluid to flow between the sub-grinding sections S in a direction parallel to the axial direction of the stirring shaft 120, further reducing the flow resistance of the conveying air flow F and reducing the energy consumption. Preferably, the overflow holes penetrate in a direction parallel to the axis of the stirring shaft 120, and the overflow holes are spaced apart in the circumferential direction of the stirring unit 130.
In order to improve the heat dissipation performance of the housing 110, in this embodiment, a cooling device 170 is disposed outside the housing 110, and the cooling device 170 is a circulating cooling layer and/or cooling fins, and the circulating cooling layer may be formed by arranging a circulating air cooling channel or a circulating water cooling channel.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed.
Claims (9)
1. Stirring device of cement clinker grinding implementation equipment, comprising a stirring shaft (120) capable of being driven to rotate by a driving system (150), and at least one stirring unit (130) arranged on the axial direction of the stirring shaft (120), wherein a sub-grinding area (S) is formed on two sides of the stirring unit (130) along the axial direction of the stirring shaft (120), at least one reinforcing stirring piece (140) is connected with the stirring unit (130), and the reinforcing stirring piece (140) extends in the sub-grinding area (S) so as to enable at least part of grinding media and materials of the sub-grinding area (S) to perform grinding motion along the circumferential direction of the stirring shaft (120); the reinforced stirring piece (140) is at least one of a first stirring piece and a second stirring piece, the extension line of the first stirring piece is parallel to the axis of the stirring shaft (120), the first stirring piece extends along the direction parallel to the axis of the stirring shaft (120), the extension line of the second stirring piece is different from the axis of the stirring shaft (120), and the second stirring piece extends along the direction different from the axis of the stirring shaft (120); the reinforcing stirring pieces (140) are arranged at intervals in the circumferential direction of the stirring unit (130); at least two adjacent stirring units (130) are connected to each other by means of a reinforcing stirring element (140) and form a cage stirring group.
2. A cement clinker grinding implementing apparatus as claimed in claim 1, wherein the stirring unit (130) protrudes in the radial direction of the stirring shaft (120); at least two stirring units (130) are axially arranged at intervals on the stirring shaft (120); the stirring unit (130) is provided with at least one flow-through aperture configured to allow at least part of the grinding medium and the material to flow between the sub-grinding zones (S) in a direction parallel to the axial direction of the stirring shaft (120).
3. A cement clinker grinding implementing equipment stirring device according to any one of claims 1-2, characterized in that at least one of the reinforcing stirring elements (140) is of rod-like construction.
4. A stirring device for cement clinker grinding practices as claimed in any one of claims 1-2, characterized in that at least one stirring unit (130) is a disk-shaped blade (131); and/or at least one stirring unit (130) is a helical blade (132).
5. A stirring device of a cement clinker grinding implementation kit according to any one of claims 1 to 2, characterized in that said stirring unit (130) comprises at least two sub-blades, detachable or combined, which are connected in one piece by means of bolts; the reinforced stirring piece (140) and/or the stirring unit (130) are/is made of wear-resistant alloy, and a composite wear-resistant material layer is arranged on the surface of the reinforced stirring piece (140) and/or the stirring unit (130).
6. Cement clinker grinding implementation equipment for dry grinding of cement clinker, characterized by comprising:
a housing (110) including a wall defining a horizontally extending stirring chamber (111), and a feed port (112) and a discharge port (113) communicating with the stirring chamber (111);
the stirring device comprises a stirring shaft (120) extending into the stirring cavity (111) and at least one stirring unit (130) arranged on the stirring shaft (120);
a screening device (160) for separating the stirring cavity (111) and the discharge port (113);
wherein, the two sides of the stirring unit (130) along the axial direction of the stirring shaft (120) form a sub-grinding area (S), and at least one reinforcing stirring piece (140) is arranged in the sub-grinding area (S); the reinforced stirring piece (140) extends in the sub-grinding zone (S) and is matched with the stirring unit (130) so as to enable at least part of grinding media and materials in the sub-grinding zone (S) to perform grinding motion along the circumferential direction of the stirring shaft (120); the reinforced stirring piece (140) is at least one of a first stirring piece and a second stirring piece, the extension line of the first stirring piece is parallel to the axis of the stirring shaft (120), the first stirring piece extends along the direction parallel to the axis of the stirring shaft (120), the extension line of the second stirring piece is different from the axis of the stirring shaft (120), and the second stirring piece extends along the direction different from the axis of the stirring shaft (120); the reinforcing stirring pieces (140) are arranged at intervals in the circumferential direction of the stirring unit (130); at least two adjacent stirring units (130) are connected to each other by means of a reinforcing stirring element (140) and form a cage stirring group.
7. The cement clinker grinding implementation arrangement of claim 6, wherein the enhanced stirring member (140) is connected to a stirring unit (130), and wherein the stirring unit (130) and the housing (110) are rotated relative to each other; or, the reinforced stirring piece (140) is connected with the shell (110), the shell (110) rotates, and the stirring unit (130) and the shell (110) rotate relatively.
8. Cement clinker grinding implementing equipment according to claim 6, characterized in that a gap (W1) is provided between the wall and the stirring unit, the ratio of the width of the gap (W1) to the diameter of the grinding medium being greater than 3; the wall forms an annular space area (R) at the periphery of the stirring unit (130), and the sub-grinding area (S) drives the annular space area (R) to perform grinding movement; the cross section of the stirring cavity (111) is at least one of round, elliptic and polygonal; the inner side of the wall is provided with a wear-resistant lining cylinder which is made of at least one material selected from wear-resistant alloy, ceramic, nylon and polyurethane; a cooling device (170) is arranged outside the shell (110); the cooling device (170) comprises a circulating cooling layer and/or cooling fins.
9. The cement clinker grinding implementation equipment according to claim 6, wherein the feed inlet (112) is provided on the end (M) of the housing (110), the feed inlet (112) being fed in cooperation with a cavity zone at the periphery of the stirring shaft (120); the screening device (160) is divided between the stirring cavity (111) and the discharge hole (113) to form a flow-through cavity (116) for gas-solid separation; the ground materials in the overflow cavity (116) are settled to a discharge hole (113) under the action of the combined force of self gravity and the wind force of the conveying airflow (F) and are separated from the conveying airflow (F); the ground material is separated from the grinding media by a screening device (160); the screening device (160) comprises at least a stationary screening deck mounted in the housing (110), the screening deck having a screening mesh diameter smaller than the diameter of the grinding media.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910686602.XA CN110449226B (en) | 2019-07-29 | 2019-07-29 | Cement clinker grinding implementation equipment and stirring device thereof |
| PCT/CN2020/082715 WO2021017515A1 (en) | 2019-07-29 | 2020-04-01 | Cement clinker grinding implementation equipment, stirring device thereof and cement grinding system |
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| CN201910686602.XA CN110449226B (en) | 2019-07-29 | 2019-07-29 | Cement clinker grinding implementation equipment and stirring device thereof |
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| CN110449226B true CN110449226B (en) | 2024-04-05 |
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| WO2021017515A1 (en) * | 2019-07-29 | 2021-02-04 | 成都利君实业股份有限公司 | Cement clinker grinding implementation equipment, stirring device thereof and cement grinding system |
| CN111545307A (en) * | 2020-06-08 | 2020-08-18 | 盐城工学院 | Vertical micro-nano energy-saving ball mill |
| CN113953029B (en) * | 2021-10-18 | 2023-01-31 | 天津水泥工业设计研究院有限公司 | Dry stirring mill and operation method thereof |
| CN113953026B (en) * | 2021-10-18 | 2023-03-21 | 天津水泥工业设计研究院有限公司 | Triaxial dry-method stirring mill |
| CN113976277B (en) * | 2021-10-18 | 2023-01-31 | 天津水泥工业设计研究院有限公司 | Cement external circulation vertical mill combined high-performance grinding process system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671134A (en) * | 2009-09-22 | 2010-03-17 | 南京旋立重型机械有限公司 | Semi-finished grinding process of cement wind selection pre-grinding and device thereof |
| CN103189142A (en) * | 2010-10-27 | 2013-07-03 | 耐驰粉磨技术有限责任公司 | Stirring ball mill |
| CN206965844U (en) * | 2017-04-03 | 2018-02-06 | 尹国祥 | A kind of Novel super-thin agitator mill |
| CN107952529A (en) * | 2016-10-18 | 2018-04-24 | 威利A.巴霍芬公司 | Blender formula ball mill |
| CN211636761U (en) * | 2019-07-29 | 2020-10-09 | 成都利君实业股份有限公司 | Cement clinker grinding implementation equipment and stirring device thereof |
-
2019
- 2019-07-29 CN CN201910686602.XA patent/CN110449226B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671134A (en) * | 2009-09-22 | 2010-03-17 | 南京旋立重型机械有限公司 | Semi-finished grinding process of cement wind selection pre-grinding and device thereof |
| CN103189142A (en) * | 2010-10-27 | 2013-07-03 | 耐驰粉磨技术有限责任公司 | Stirring ball mill |
| CN107952529A (en) * | 2016-10-18 | 2018-04-24 | 威利A.巴霍芬公司 | Blender formula ball mill |
| CN206965844U (en) * | 2017-04-03 | 2018-02-06 | 尹国祥 | A kind of Novel super-thin agitator mill |
| CN211636761U (en) * | 2019-07-29 | 2020-10-09 | 成都利君实业股份有限公司 | Cement clinker grinding implementation equipment and stirring device thereof |
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