CN112156855A - Sand making system and operation method thereof - Google Patents
Sand making system and operation method thereof Download PDFInfo
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- CN112156855A CN112156855A CN202011088333.6A CN202011088333A CN112156855A CN 112156855 A CN112156855 A CN 112156855A CN 202011088333 A CN202011088333 A CN 202011088333A CN 112156855 A CN112156855 A CN 112156855A
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- vertical mill
- powder
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- air
- sand
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- 239000004576 sand Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 14
- 239000000843 powder Substances 0.000 claims abstract description 70
- 239000000463 material Substances 0.000 claims abstract description 38
- 238000000227 grinding Methods 0.000 claims abstract description 30
- 239000000428 dust Substances 0.000 claims abstract description 19
- 239000002893 slag Substances 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims description 16
- 238000003801 milling Methods 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000011435 rock Substances 0.000 claims description 5
- 230000009471 action Effects 0.000 claims description 4
- 239000002912 waste gas Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 239000004575 stone Substances 0.000 description 7
- 239000002994 raw material Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 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
- 238000012216 screening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
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
- B02C15/007—Mills with rollers pressed against a rotary horizontal disc
-
- 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
-
- 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
-
- 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
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention relates to a sand making system and an operation method thereof, wherein the system comprises a vertical mill, wherein a grinding disc, a feed inlet, an air inlet and a slag outlet are arranged in the vertical mill; the discharge end of the belt conveyor is connected with the feed inlet of the vertical mill, and one end of the air inlet pipe is connected to the air inlet of the vertical mill and arranged below the grinding disc; the feed inlet of the elevator is connected with the slag outlet of the vertical mill, the feed inlet of the dust collector is connected with the fine powder outlet of the vertical mill, the material guiding device is arranged in the vertical mill in an inserting mode, the vertical mill is also provided with a powder concentrator, and the feed inlet of the material guiding device extends into the vertical mill and is connected with the coarse powder outlet of the powder concentrator; an air inlet of the fan is connected with an air outlet of the dust collector, and an air ring is arranged between the edge of the grinding disc and the shell; the invention simplifies the flow to improve the processing efficiency and reduce the energy consumption; and meanwhile, the purity of the machine-made sand is improved.
Description
Technical Field
The invention relates to a sand making system and an operation method 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 sand making system and an operation method thereof, which simplify the process to improve the processing efficiency and reduce the energy consumption, and simultaneously improve the purity of the machine-made sand.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a system for making sand, is equipped with mill, feed inlet, air intake, slag notch, air outlet (discharge gate) including founding the mill in founding the mill, its characterized in that: the device also comprises a belt conveyor, a rotary feeder, a material guiding device, an air inlet pipe, a lifter, a dust collector and a fan; the discharge end of the belt conveyor is connected with the feed inlet of the vertical mill, and one end of the air inlet pipe is connected to the air inlet of the vertical mill and arranged below the grinding disc; the material outlet (air outlet) of the vertical mill is connected with the air inlet (feed inlet) of the dust collector, the material guiding device is arranged in the vertical mill in an inserting mode, the vertical mill is further provided with a powder selecting machine, and the feed inlet of the material guiding device extends into the vertical mill and is connected with the coarse powder outlet of the powder selecting machine; the air inlet of the fan is connected with the air outlet of the dust collector, and an air ring is arranged between the edge of the grinding disc and the vertical grinding shell.
Preferably, a grading device is further arranged below a discharge port of the material guiding device, a plurality of vertically overlapped screens are arranged in the grading device, and the inner diameters of the screen holes of the plurality of screens are gradually reduced from top to bottom.
Preferably, the inner diameter of a sieve hole of the screen is 0.08-4.75 mm.
A method of operating a sand production system, comprising: the method comprises the following steps:
(1) the lump rock is fed into the vertical mill through the belt conveyor and the rotary feeder, and is milled by the milling roller and the milling disc, and the milled material moves to the edge of the milling disc under the rotation of the milling disc.
(2) Powder selecting airflow enters the vertical mill through the air inlet pipe and the air inlet of the vertical mill, passes through the air ring from bottom to top and then enters the upper part of the grinding disc, and the material finally slides down the grinding disc and falls into the air ring under the rotation of the grinding disc; small particles and powder in the falling materials are blown upwards by the powder selecting airflow and are carried into the powder selecting machine; the large materials can not be blown up by the powder selecting airflow and fall down along the air ring, are discharged out of the vertical mill through a slag outlet of the vertical mill, then enter the elevator, return to the belt conveyor through the elevator and are fed into the vertical mill through the rotary blanking device again for circular grinding.
(3) The materials brought into the powder concentrator are subjected to particle size classification in the powder concentrator to screen out fine powder and coarse powder, the fine powder is taken out of the vertical mill along with the powder concentration airflow under the action of a fan, the fine powder enters a dust collector to be collected as powder, and the waste gas after dust collection is discharged into the atmosphere by the fan; the coarse powder is taken out of the vertical mill by the material guiding device and then enters the grading device, and machine-made sand products with various particle size ranges are prepared by means of a plurality of screens.
Preferably, the particle size of the fine powder in the step (3) is less than 80 microns, and the particle size of the coarse powder is more than 80 microns.
Compared with the prior art, the invention has the advantages that: the invention adopts the vertical mill to crush the raw materials, and utilizes the powder concentrator and the powder concentrating airflow to sieve the machine-made sand and the coarse aggregate, thereby simplifying the flow to improve the processing efficiency and reduce the energy consumption; meanwhile, powder in the machine-made sand is removed by means of the vertical mill powder concentrator and the dust collector, so that the purity of the machine-made sand is improved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a structural position diagram of the grading device of the present 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 fig. 1, a sand making system comprises a vertical mill 3, wherein a grinding disc 32 feeding hole, an air inlet, a slag outlet, an air outlet (one hole is formed by the grinding disc and a fine powder discharging hole) are arranged in the vertical mill 3, and the sand making system also comprises a belt conveyor 1, a rotary blanking device 2, a material guiding device 4, an air inlet pipe 5, a hoister 6, a dust collector 7 and a fan 8; the discharge end of the belt conveyor 1 is connected with the feed inlet of the vertical mill 3, and one end of an air inlet pipe 5 is connected to the air inlet of the vertical mill 3 and is arranged below the grinding disc 32; a feed inlet of the elevator 6 is connected with a slag outlet of the vertical mill 3, an air inlet (feed inlet) of the dust collector 7 is connected with a fine powder outlet (air outlet) of the vertical mill 3, the material guiding device 4 is arranged in the vertical mill 3 in an inserting manner, the vertical mill 3 is also provided with the powder concentrator 31, and the feed inlet of the material guiding device 4 extends into the vertical mill 3 and is connected with a coarse powder outlet of the powder concentrator 31; an air inlet of the fan 8 is connected with an air outlet of the dust collector 7, and an air ring 33 is arranged between the edge of the grinding disc 32 and the vertical grinding shell.
As shown in figure 2, a grading device 9 is further arranged below a discharge hole of the material guiding device 4, a plurality of vertically overlapped screens 91 are arranged in the grading device 9, the inner diameters of the screen holes of the screens 91 are gradually reduced from top to bottom, and the inner diameters of the screen holes of the screens 91 are 0.08-4.75 mm.
A method of operating a sand production system comprising the steps of:
(1) the lump rock is fed into a vertical mill 3 through a belt conveyor 1 and a rotary feeder 2, the lump rock is milled by a grinding roller and a grinding disc 32, and the milled rock moves to the edge of the grinding disc 32 under the rotation of the grinding disc 32
(2) The powder selecting airflow enters the vertical mill 3 through the air inlet pipe 5 and the air inlet of the vertical mill, and enters the upper part of the grinding disc 32 from bottom to top after passing through the air ring 33, the materials finally slide down the grinding disc 32 under the rotation of the grinding disc 32 and fall into the air ring 33, small particles and powder in the falling materials are blown upwards by the powder selecting airflow and are brought into the powder selecting machine 31, large materials cannot be blown by the powder selecting airflow and are discharged out of the vertical mill through the slag outlet of the vertical mill 3, then enter the elevator 7, return to the belt conveyor 1 through the elevator 7, and are fed into the vertical mill 3 through the rotary blanking device 2 again for circular grinding.
(3) The material brought into the powder concentrator 31 is subjected to particle size classification in the powder concentrator 31 to screen out fine powder (the particle size is less than 80 microns) and coarse powder (the particle size is more than 80 microns), the fine powder is taken out of the vertical mill along with the powder concentration airflow under the action of the fan 8 and enters the dust collector 7 to be collected as powder, and the waste gas after dust collection is discharged into the atmosphere by the fan 8; the coarse powder is taken out of the vertical mill 3 through the material guiding device 4 and then enters the grading device 9, and machine-made sand products with various particle size ranges are prepared by means of a plurality of screens 91.
The invention adopts the vertical mill 3 to crush the raw materials, and screens out machine-made sand with various particle sizes by the aid of the powder concentrator 31 and the grading device 9 under the action of powder concentration airflow, thereby simplifying the process, improving the processing efficiency and reducing the energy consumption; meanwhile, powder in the aggregate is removed by means of the vertical mill powder concentrator 31 and the dust collector 7, so that the purity of the machine-made sand 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 (5)
1. The utility model provides a system for making sand, is equipped with mill, feed inlet, air intake, slag notch, air outlet (fine powder export) including founding the mill in, its characterized in that: the device also comprises a belt conveyor, a rotary feeder, a material guiding device, an air inlet pipe, a lifter, a dust collector and a fan; the discharge end of the belt conveyor is connected with the feed inlet of the vertical mill, and one end of the air inlet pipe is connected to the air inlet of the vertical mill and arranged below the grinding disc; the material outlet (air outlet) of the vertical mill is connected with the air inlet (feed inlet) of the dust collector, the material guiding device is arranged in the vertical mill in an inserting mode, the vertical mill is further provided with a powder selecting machine, and the feed inlet of the material guiding device extends into the vertical mill and is connected with the coarse powder outlet of the powder selecting machine; the air inlet of the fan is connected with the air outlet of the dust collector, and an air ring is arranged between the edge of the grinding disc and the vertical grinding shell.
2. A sand making system as claimed in claim 1, wherein: the material guiding device is characterized in that a grading device is further arranged below a discharge hole of the material guiding device, a plurality of vertically overlapped screens are arranged in the grading device, and the inner diameters of the screen holes of the screens are gradually reduced from top to bottom.
3. A sand making system as claimed in claim 2, wherein: the inner diameter of a sieve hole of the screen is 0.08-4.75 mm.
4. A method of operating a sand production system, comprising: the method comprises the following steps:
(1) the lump rock is fed into the vertical mill through the belt conveyor and the rotary feeder, and is milled by the milling roller and the milling disc, and the milled material moves to the edge of the milling disc under the rotation of the milling disc.
(2) Powder selecting airflow enters the vertical mill through the air inlet pipe and the air inlet of the vertical mill, passes through the air ring from bottom to top and then enters the upper part of the grinding disc, and the material finally slides down the grinding disc and falls into the air ring under the rotation of the grinding disc; small particles and powder in the falling materials are blown upwards by the powder selecting airflow and are carried into the powder selecting machine; the large materials can not be blown up by the powder selecting airflow and fall down along the air ring, are discharged out of the vertical mill through a slag outlet of the vertical mill, then enter the elevator, return to the belt conveyor through the elevator and are fed into the vertical mill through the rotary blanking device again for circular grinding.
(3) The materials brought into the powder concentrator are subjected to particle size classification in the powder concentrator to screen out fine powder and coarse powder, the fine powder is taken out of the vertical mill along with the powder concentration airflow under the action of a fan, the fine powder enters a dust collector to be collected as powder, and the waste gas after dust collection is discharged into the atmosphere by the fan; the coarse powder is taken out of the vertical mill by the material guiding device and then enters the grading device, and machine-made sand products with various particle size ranges are prepared by means of a plurality of screens.
5. The method of operating a sand production system as recited in claim 4, further comprising: the granularity of the fine powder in the step (3) is less than 80 microns, and the granularity of the coarse powder is more than 80 microns.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011088333.6A CN112156855A (en) | 2020-10-13 | 2020-10-13 | Sand making system and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011088333.6A CN112156855A (en) | 2020-10-13 | 2020-10-13 | Sand making system and operation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN112156855A true CN112156855A (en) | 2021-01-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011088333.6A Pending CN112156855A (en) | 2020-10-13 | 2020-10-13 | Sand making system and operation method thereof |
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| CN (1) | CN112156855A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113814053A (en) * | 2021-08-18 | 2021-12-21 | 朱忠祥 | Automatic production system for printing ink |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113814053A (en) * | 2021-08-18 | 2021-12-21 | 朱忠祥 | Automatic production system for printing ink |
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