CN112156854A - Coarse and fine aggregate simultaneous preparation system - Google Patents
Coarse and fine aggregate simultaneous preparation system Download PDFInfo
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- CN112156854A CN112156854A CN202011088321.3A CN202011088321A CN112156854A CN 112156854 A CN112156854 A CN 112156854A CN 202011088321 A CN202011088321 A CN 202011088321A CN 112156854 A CN112156854 A CN 112156854A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 239000000843 powder Substances 0.000 claims abstract description 75
- 239000000428 dust Substances 0.000 claims abstract description 23
- 239000002893 slag Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 18
- 230000008569 process Effects 0.000 claims abstract description 16
- 238000000227 grinding Methods 0.000 claims abstract description 11
- 239000000463 material Substances 0.000 claims description 39
- 239000002245 particle Substances 0.000 claims description 20
- 239000002912 waste gas Substances 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 239000011435 rock Substances 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000004576 sand Substances 0.000 description 21
- 239000004575 stone Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000012615 aggregate Substances 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000009440 infrastructure construction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
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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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C15/007—Mills with rollers pressed against a rotary horizontal disc
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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
- B02C23/02—Feeding devices
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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
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
- B02C23/12—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone with return of oversize material to crushing or disintegrating 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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
- B02C2015/002—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs combined with a classifier
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention relates to a coarse and fine aggregate simultaneous preparation system and a process flow thereof, which comprises a vertical mill, wherein the vertical mill is provided with a feed inlet, a grinding roller and a grinding disc, and an air ring is arranged between the edge of the grinding disc and a shell; the device also comprises a feeding belt, an air inlet pipe, a vibrating screen, a lifter, a dust collector and a spiral conveying device; the discharge end of the feeding belt is connected with the feed inlet of the vertical mill, one end of an air inlet pipe is connected with the air inlet of the vertical mill and is arranged below the air ring, the feed inlet of the vibrating screen is connected with the slag outlet of the vertical mill, the feed inlet of the elevator is connected with the discharge outlet of the vibrating screen, the feed inlet (air inlet) of the dust collector is connected with the fine powder outlet (air outlet) of the vertical mill, the vertical mill is also provided with a slag outlet and a powder concentrator, and the feed inlet of the spiral conveying device is connected with the coarse powder outlet of the powder concentrator; according to the invention, the raw materials are crushed by the vertical mill, and the fine aggregate and the coarse aggregate are screened out by the powder concentrator and vibration, so that the process is simplified, the processing efficiency is improved, the energy consumption is reduced, and the function of synchronously preparing the fine aggregate and the coarse aggregate is realized; meanwhile, the fine powder in the fine aggregate is removed by means of the vertical mill powder concentrator and the dust collector, so that the purity of the fine aggregate is improved.
Description
Technical Field
The invention relates to a system for simultaneously preparing coarse and fine aggregates and a process flow thereof.
Background
The sand for construction is mainly river sand in the past, but because river sand is exploited for many years in excess, the ecological environment and safety of the river channel are overwhelmed, and the sand resources are nearly exhausted. The country forbids to exploit river sand for protecting ecological environment, and is one of important measures for protecting channel safety and water ecology of Yangtze river and the like, but river sand supply amount can be directly reduced, and the infrastructure construction scale of China is larger and larger, so that the promotion of using machine-made sand to replace river sand is imperative.
The concrete is mainly composed of cement, aggregate, water, an additive and the like, wherein the aggregate is divided into coarse aggregate and fine aggregate, the fine aggregate is also called sand, and the aggregate is most commonly sandstone aggregate in the aggregate types, and the sandstone aggregate has the advantages of large resource quantity, fixed material source, stable performance, lower price, fixed production place, contribution to environmental protection and the like, so the concrete is an ideal aggregate product in construction engineering.
The sandstone aggregate is a general name of materials such as sand, pebble (gravel) stone, broken stone, block stone, material stone and the like, in the preparation process of the sandstone aggregate, the prepared aggregate with the particle size of more than 4.75mm is called coarse aggregate, namely what we often say is stone or broken stone, and the aggregate with the particle size of less than 4.75mm is called fine aggregate, also called sand or machine-made sand; the sandstone aggregate is a main building material of structures such as concrete, piled stone and the like in construction engineering.
At present, the preparation of the machine-made sand mainly adopts a mode of crushing raw materials firstly and then screening, wherein the crushing is mainly finished by a crusher or a vertical mill; the crusher is divided into coarse crushing, medium crushing, fine crushing and the like according to the granularity of input and output materials and the application of products, but due to the crushing principle, when medium sand and fine sand are prepared, the raw materials are crushed for multiple times to reach the granularity of the machine-made sand, the process flow is complex, the time consumption is long, and further the processing efficiency is low and the energy consumption is high; when the vertical mill is used for crushing, the proportion of powder in the machine-made sand is too high, so that the purity of the machine-made sand is low, and the machine-made sand is to be further improved.
Disclosure of Invention
In view of the current situation of the prior art, the technical problem to be solved by the present invention is to provide a synchronous coarse and fine aggregate preparation system and a process flow thereof, which simplify the process to improve the processing efficiency and reduce the energy consumption, and simultaneously improve the purity of fine aggregates (machine-made sand).
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a thick and thin aggregate prepares system simultaneously, includes vertical mill, dust collector, fan, chute, is equipped with mill, grinding roller, wind ring, feed inlet, air intake, air outlet in the vertical mill, and the wind ring is located the mill edge and vertically grinds between the casing, its characterized in that: the system also comprises a feeding belt, a vibrating screen, a lifter and a spiral conveying device; the vertical mill is provided with a slag hole, and the slag hole is positioned below the grinding disc and the air ring; the discharge end of the feeding belt is connected with the feed inlet of the vertical mill, one end of the air inlet pipe is connected with the air inlet of the vertical mill and is arranged below the air ring, the feed inlet of the vibrating screen is connected with the slag outlet of the vertical mill, the feed inlet of the elevator is connected with the discharge outlet of the vibrating screen, the feed inlet (air inlet) of the dust collector is connected with the fine powder outlet (air outlet) of the vertical mill, the spiral conveying device is arranged in the vertical mill in an inserting mode, the powder concentrator is further arranged in the vertical mill, the spiral conveying device is located below the powder concentrator, and the feed inlet of the spiral conveying device is connected with the coarse powder outlet of the powder concentrator; the air inlet of the fan is connected with the air outlet of the dust collector, and the discharge hole of the dust collector is connected with the feed end of the chute.
Preferably, a style wheel is further arranged between the discharge end of the feeding belt and the feed inlet of the vertical mill.
Preferably, the vibrating screen comprises a plurality of vertically stacked screen meshes, and the inner diameter of each screen mesh is gradually reduced from top to bottom.
Preferably, the sieve holes of the vibrating sieve are 4.75-40 mm.
Preferably, a grading device is further arranged below the discharge hole of the spiral conveying device, the grading device comprises a plurality of vertically stacked second screens, and the inner diameters of the screen holes of the plurality of second screens are gradually reduced from top to bottom.
Preferably, the inner diameter of the sieve hole of the second sieve is 0.08-4.75 mm.
Preferably, an air locking blanking device is further arranged between the feeding hole of the vibrating screen and the slag outlet of the vertical mill.
A technological process of a system for simultaneously preparing coarse and fine aggregates is characterized in that: the method comprises the following steps:
(1) the block rock is fed into the vertical mill through the feeding belt and the style wheel to be milled, the milled material moves to the edge of the mill disc under the rotation of the mill disc, and the powder selecting airflow enters the vertical mill through the air inlet pipe and enters the upper part of the mill disc from bottom to top after passing through the air ring.
(2) The materials finally slide down the millstone and fall into the air ring under the rotation of the millstone, small particles and powder in the falling materials are blown upwards by the powder selecting airflow and are carried into the powder selecting machine, large materials cannot be blown by the powder selecting airflow and are discharged from the vertical mill through a slag outlet of the vertical mill, then the large materials enter the vibrating screen, coarse aggregates and large materials in various particle size ranges are screened out by the vibrating screen, the coarse aggregates are discharged outwards and collected, and the large materials return to the feeding belt through the elevator and return to the vertical mill again for circular crushing.
(3) The materials brought into the powder concentrator are subjected to particle size classification in the powder concentrator, fine powder is discharged from an air outlet of the vertical mill along with the airflow of the powder concentrator under the action of a fan, then enters a dust collector to be collected into fine powder, and is output outwards through a chute, and the waste gas after dust collection is discharged into the atmosphere by the fan; and collecting coarse powder from the conical part of the powder concentrator, and taking the coarse powder out of the vertical mill by a spiral conveying device to prepare fine aggregate.
(4) In the process of preparing the fine aggregate and the coarse aggregate, if the yield of the fine aggregate needs to be increased, the operating pressure of the vertical mill is increased, and further, the blocky materials are ground in the vertical mill to generate more small particles; if the yield of the coarse aggregate needs to be increased, the operation pressure of the vertical mill is reduced, and then the large materials are crushed into materials with larger granularity, fewer small particles are generated, and the amount of fine powder is synchronously reduced.
Preferably, the particle size of the coarse aggregate in the step (2) is 4.75-40 mm.
Preferably, the particle size of the fine powder in the step (4) is less than 0.08mm, and the particle size of the coarse powder is 0.08-4.75 mm.
Compared with the prior art, the invention has the advantages that: according to the invention, the raw materials are crushed by the vertical mill, and fine aggregates and coarse aggregates are screened out by the powder concentrator and the vibrating screen, so that the process is simplified, the processing efficiency is improved, and the energy consumption is reduced; meanwhile, powder in the fine aggregate (machine-made sand) is removed by means of the vertical mill powder concentrator and the dust collector, so that the purity of the fine aggregate is improved; the simultaneous preparation of coarse aggregate is realized through the vertical mill air ring, the slag discharging port and the vibrating screen, so that the system has the function of simultaneously preparing coarse and fine aggregate, the aggregate yield is improved, and the data is effectively utilized; the system can adjust the proportion of finished products of fine aggregate and coarse aggregate by adjusting the pressure of the vertical mill, and is flexible.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a position diagram of a shaker structure having a multi-stage screen of the present invention;
FIG. 3 is a view showing the position of the structure of the fine aggregate classifying device according to the present invention;
fig. 4 is a structural position diagram of the air locking blanking device of the invention.
Detailed Description
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present invention clear and concise, a detailed description of known functions and known components of the invention have been omitted.
As shown in figure 1, the system for simultaneously preparing coarse and fine aggregates comprises a vertical mill 3, a dust collector 8, a fan 9 and a chute 10, wherein a grinding disc 3-8, a grinding roller 3-9, an air ring 3-7, a feed inlet 3-1, an air inlet 3-4 and an air outlet 3-6 are arranged in the vertical mill 3, and the air ring 3-7 is positioned between the edge of the grinding disc 3-8 and the shell of the vertical mill 3, and is characterized in that: the system also comprises a feeding belt 1, a spiral conveying device 4, an air inlet pipe 5, a vibrating screen 6 and a lifter 7; the vertical mill is provided with a slag hole 3-5, and the slag hole 3-5 is positioned below the grinding disc and the air ring; the discharge end of the feeding belt 1 is connected with a feed inlet 3-1 of the vertical mill, one end of an air inlet pipe 5 is connected with an air inlet 3-4 of the vertical mill 3 and is arranged below an air ring 3-7, a feed inlet of the vibrating screen 6 is connected with a slag outlet 3-5 of the vertical mill 3, a feed inlet of the elevator 7 is connected with a discharge outlet of the vibrating screen 6, a feed inlet (an air inlet) of the dust collector 8 is connected with a fine powder outlet (an air outlet) 3-6 of the vertical mill 3, the spiral conveying device 4 is arranged in the vertical mill 3 in an inserting manner, a powder concentrator 3-2 is further arranged in the vertical mill 3, the spiral conveying device 4 is positioned below the powder concentrator 3-2, and a feed inlet of the spiral conveying device 4 is connected with a coarse powder outlet 3-3 of the powder concentrator; an air inlet of the fan 9 is connected with an air outlet of the dust collector 8, and a discharge hole of the dust collector 8 is connected with a feed end of the chute 10.
A style wheel 2 is also arranged between the discharge end of the feeding belt 1 and the feed inlet of the vertical mill 3.
As shown in FIG. 2, the vibrating screen 6 comprises a plurality of vertically stacked screens 6-1, the inside diameters of the screens 6-1 are gradually reduced from top to bottom, and the inside diameter of the screen 6-1 is 4.75-40 mm.
As shown in figure 3, a grading device is further arranged below the discharge hole of the spiral conveying device 4, the grading device comprises a plurality of vertically overlapped second screens, the inner diameters of the screen holes of the second screens are gradually reduced from top to bottom, and the inner diameters of the screen holes of the second screens are 0.08-4.75 mm.
As shown in fig. 4, an air-locking blanking device 12 is also arranged between the feed inlet of the vibrating screen 6 and the slag outlet of the vertical mill 3.
A technological process of a system for simultaneously preparing coarse and fine aggregates comprises the following steps:
(1) the massive rocks are fed into a vertical mill 3 through a feeding belt 1 and a style wheel 2 to be milled, the milled materials move to the edge of the mill disc under the rotation of the mill disc 3-8, and powder selecting airflow enters the vertical mill through an air inlet pipe 5 and enters the upper part of the mill disc 3-8 after passing through an air ring 3-7 from bottom to top.
(2) The materials finally slide down the millstone 3-8 under the rotation of the millstone 3-8 and fall into the air ring 3-4, small particles and powder in the falling materials are blown upwards by the powder selecting airflow and are brought into the powder selecting machine, large materials cannot be blown by the powder selecting airflow and are discharged from the vertical mill through a slag outlet 3-5 of the vertical mill 3, then the large materials enter the vibrating screen 6, coarse aggregates and large materials with various particle size ranges are screened out by the vibrating screen 6, the coarse aggregates are discharged outwards and collected, and the large materials return to the feeding belt 1 through the elevator 7 and return to the vertical mill 3 again for circular crushing.
(3) The material brought into the powder concentrator 3-2 is subjected to particle size classification in the powder concentrator 3-2, fine powder is vertically ground along with the powder concentration airflow from the air outlet 3-6 under the action of the fan 9, then enters the dust collector 8 to be collected into fine powder and is output outwards through the chute 10, and the waste gas after dust collection is discharged into the atmosphere by the fan 9; the coarse powder is collected from the conical part 3-3 of the powder concentrator and is taken out of the vertical mill by the spiral conveying device 4, and fine aggregate is prepared.
(4) In the process of preparing the fine aggregate and the coarse aggregate, if the yield of the fine aggregate needs to be increased, the operating pressure of the vertical mill 3 is increased, so that the blocky materials are ground in the vertical mill 3 to generate more small particles; if the yield of the coarse aggregate needs to be increased, the operating pressure of the vertical mill 3 is reduced, so that the large materials are crushed into larger materials, fewer small particles are produced, and the amount of fine powder is synchronously reduced.
(5) The air locking blanking device 12 can prevent air from leaking into the vertical mill 3 when large materials come out of the slag outlet 3-5 of the vertical mill 3, so as to reduce the air leakage rate of the vertical mill 3 system, reduce the system resistance and save the air separation power consumption; when raw materials with high moisture content are ground in the vertical mill 3, the drying of the materials is completed at the same time, so that the powder selecting airflow is hot air with a certain temperature, the air leaking into the vertical mill 3 absorbs a certain amount of heat to become hot waste gas, and the air locking blanking device 12 is additionally arranged to prevent air leakage and reduce the drying heat.
According to the invention, the vertical mill 3 is adopted to crush the raw materials, and the fine aggregate and the coarse aggregate are screened out by means of the vertical mill powder concentrator 3-2 and the vibrating screen 6, so that the process is simplified, the processing efficiency is improved, and the energy consumption is reduced; meanwhile, powder in the aggregate is removed by means of the vertical mill powder concentrator 3-2 and the dust collector 8, so that the purity of the aggregate, particularly fine aggregate, is improved.
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 skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a thick and thin aggregate prepares system simultaneously, includes vertical mill, dust collector, fan, chute, is equipped with mill, grinding roller, wind ring, feed inlet, air intake, air outlet in the vertical mill, and the wind ring is located the mill edge and vertically grinds between the casing, its characterized in that: the system also comprises a feeding belt, a vibrating screen, a lifter and a spiral conveying device; the vertical mill is provided with a slag hole, and the slag hole is positioned below the grinding disc and the air ring; the discharge end of the feeding belt is connected with the feed inlet of the vertical mill, one end of the air inlet pipe is connected with the air inlet of the vertical mill and is arranged below the air ring, the feed inlet of the vibrating screen is connected with the slag outlet of the vertical mill, the feed inlet of the elevator is connected with the discharge outlet of the vibrating screen, the feed inlet (air inlet) of the dust collector is connected with the fine powder outlet (air outlet) of the vertical mill, the spiral conveying device is arranged in the vertical mill in an inserting mode, the powder concentrator is further arranged in the vertical mill, the spiral conveying device is located below the powder concentrator, and the feed inlet of the spiral conveying device is connected with the coarse powder outlet of the powder concentrator; the air inlet of the fan is connected with the air outlet of the dust collector, and the discharge hole of the dust collector is connected with the feed end of the chute.
2. A system for the simultaneous preparation of coarse and fine aggregates according to claim 1, characterised in that: and a style wheel is also arranged between the discharge end of the feeding belt and the feed inlet of the vertical mill.
3. A system for the simultaneous preparation of coarse and fine aggregates according to claim 1, characterised in that: the vibrating screen comprises a plurality of vertically overlapped screen meshes, and the inner diameters of the screen meshes are gradually reduced from top to bottom.
4. A system for the simultaneous preparation of coarse and fine aggregates according to claim 3, characterized in that: the inner diameter of a sieve hole of the screen of the vibrating sieve is 4.75-40 mm.
5. A system for the simultaneous preparation of coarse and fine aggregates according to claim 1, characterised in that: and an air locking blanking device is arranged between the feed inlet of the vibrating screen and the slag outlet of the vertical mill.
6. A technological process of a system for simultaneously preparing coarse and fine aggregates is characterized in that: the method comprises the following steps:
(1) the block rock is fed into the vertical mill through the feeding belt and the style wheel to be milled, the milled material moves to the edge of the mill disc under the rotation of the mill disc, and the powder selecting airflow enters the vertical mill through the air inlet pipe and enters the upper part of the mill disc from bottom to top after passing through the air ring.
(2) The materials finally slide down the millstone and fall into the air ring under the rotation of the millstone, small particles and powder in the falling materials are blown upwards by the powder selecting airflow and are carried into the powder selecting machine, large materials cannot be blown by the powder selecting airflow and are discharged from the vertical mill through a slag outlet of the vertical mill, then the large materials enter the vibrating screen, coarse aggregates and large materials in various particle size ranges are screened out by the vibrating screen, the coarse aggregates are discharged outwards and collected, and the large materials return to the feeding belt through the elevator and return to the vertical mill again for circular crushing.
(3) The materials brought into the powder concentrator are subjected to particle size classification in the powder concentrator, fine powder is discharged from an air outlet of the vertical mill along with the airflow of the powder concentrator under the action of a fan, then enters a dust collector to be collected into fine powder, and is output outwards through a chute, and the waste gas after dust collection is discharged into the atmosphere by the fan; and collecting coarse powder from the conical part of the powder concentrator, and taking the coarse powder out of the vertical mill by a spiral conveying device to prepare fine aggregate.
(4) In the process of preparing the fine aggregate and the coarse aggregate, if the yield of the fine aggregate needs to be increased, the operating pressure of the vertical mill is increased, and further, the blocky materials are ground in the vertical mill to generate more small particles; if the yield of the coarse aggregate needs to be increased, the operation pressure of the vertical mill is reduced, and then the large materials are crushed into materials with larger granularity, fewer small particles are generated, and the amount of fine powder is synchronously reduced.
7. The process flow of a system for the simultaneous preparation of coarse and fine aggregates according to claim 8, characterized in that: the granularity of the coarse aggregate in the step (2) is 4.75-40 mm.
8. The process flow of a system for the simultaneous preparation of coarse and fine aggregates according to claim 8, characterized in that: the granularity of the fine powder in the step (4) is less than 0.08mm, and the granularity of the coarse powder is 0.08-4.75 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011088321.3A CN112156854A (en) | 2020-10-13 | 2020-10-13 | Coarse and fine aggregate simultaneous preparation system |
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| CN202011088321.3A CN112156854A (en) | 2020-10-13 | 2020-10-13 | Coarse and fine aggregate simultaneous preparation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112934378A (en) * | 2021-01-28 | 2021-06-11 | 天津水泥工业设计研究院有限公司 | Preparation system for producing building material products by gradient utilization of hot stuffy steel slag |
| CN114950699A (en) * | 2022-04-08 | 2022-08-30 | 浙江华东工程建设管理有限公司 | Double-powder-selecting full-dry-method desilting system and method after coarse crushing of aggregate processing system |
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| CN102784703A (en) * | 2011-05-15 | 2012-11-21 | 盐城吉达环保设备有限公司 | Serially-connected grinding technology and equipment thereof |
| CN105562159A (en) * | 2016-02-03 | 2016-05-11 | 江苏新鹏重型机电制造有限公司 | Ultra-fine grinding system for cement production |
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