CN111530597A - Dry sand making method by environment-friendly recycling of waste limestone - Google Patents
Dry sand making method by environment-friendly recycling of waste limestone Download PDFInfo
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- CN111530597A CN111530597A CN202010270757.8A CN202010270757A CN111530597A CN 111530597 A CN111530597 A CN 111530597A CN 202010270757 A CN202010270757 A CN 202010270757A CN 111530597 A CN111530597 A CN 111530597A
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- 239000004576 sand Substances 0.000 title claims abstract description 46
- 235000019738 Limestone Nutrition 0.000 title claims abstract description 40
- 239000006028 limestone Substances 0.000 title claims abstract description 40
- 239000002699 waste material Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004064 recycling Methods 0.000 title claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 65
- 238000012216 screening Methods 0.000 claims abstract description 32
- 239000000428 dust Substances 0.000 claims abstract description 31
- 238000007493 shaping process Methods 0.000 claims abstract description 12
- 239000004575 stone Substances 0.000 claims abstract description 10
- 230000001629 suppression Effects 0.000 claims abstract description 9
- 239000000843 powder Substances 0.000 claims description 30
- 239000002245 particle Substances 0.000 claims description 24
- 239000002689 soil Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004568 cement Substances 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000000265 homogenisation Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 238000005204 segregation Methods 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 238000007873 sieving Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 238000010276 construction Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 abstract 1
- 229910052749 magnesium Inorganic materials 0.000 abstract 1
- 239000011777 magnesium Substances 0.000 abstract 1
- 229910052710 silicon Inorganic materials 0.000 abstract 1
- 239000010703 silicon Substances 0.000 abstract 1
- 238000005065 mining Methods 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011435 rock Substances 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
- B02C21/00—Disintegrating plant with or without drying of the material
-
- 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
- B02C23/14—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
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
- C04B7/40—Dehydrating; Forming, e.g. granulating
-
- 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
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
- B02C2023/165—Screen denying egress of oversize material
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Food Science & Technology (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention discloses an environment-friendly waste limestone recycling dry-method sand making method, which comprises the working procedures of coarse screening, coarse crushing, primary screening, fine crushing, secondary screening, shaping, sand making, humidifying and the like, and equipment is provided with a two-stage impact crusher, a shaping machine, a screening machine and the like, a dry fog dust removal system is matched in the whole production link, and the used raw materials are as follows: high magnesium in mine, low-grade abandonment lime stone such as high silicon, stone material leftover bits and pieces, and sorting back construction waste etc, this production process of cooperation, the recovery efficiency of abandonment lime stone has been improved, the production technology is advanced, the production process safety and stability, environmental protection health, the domestic leading level of living, fine work aggregate machine system sand factory building for the production line seals, relevant raise dust point can be with dust collector and dry fog dust suppression device, when can realizing high-efficient recovery abandonment lime stone, the raise dust has been reduced, and is more environmental protection, has better development prospect, and the practicality is stronger.
Description
Technical Field
The invention belongs to the technical field of recycling of waste limestone, and particularly relates to a dry-method sand making method for environment-friendly recycling of waste limestone.
Background
Mineral resources are one of the main resources on which human beings live, are the basis and guarantee of social economy development, the social economy is rapidly developed, higher requirements are put on the mineral resources, large-scale exploitation and utilization are achieved, great contribution is made to the social economy, but due to geological disasters such as environmental pollution, water and soil loss and the like in a certain area caused by excessive or disordered exploitation, the ecological environment around a mine is gradually worsened, and even the development of regional economy is limited; at present, most of open mining mines are building mines for mining rocks, a large amount of building materials are provided for society, mine managers lack safety consciousness for protecting environment, and natural landscape and ecological environment are seriously affected, so that comprehensive finishing and smelting of open mining waste mines are accelerated for improving the surrounding environment of the mines.
However, the existing production process for recycling waste limestone still has some unreasonable factors in the process of recycling waste limestone, and when the existing production process for recycling waste limestone is used for recycling waste limestone: raise dust is easily produced, the environmental pollution influences the health of workshop workers, and recovery efficiency is lower simultaneously, can not carry out comprehensive utilization to discarded lime stone.
Disclosure of Invention
The invention aims to provide an environment-friendly dry-method sand making method by recycling waste limestone, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an environment-friendly dry-method sand making method by recycling waste limestone comprises the following steps:
step 1: waste limestone is conveyed into a material bin through a transport vehicle, and the limestone entering the material bin is uniformly conveyed into a plate-type crusher through a screen feeding machine with a gap of 150 mm;
after materials with the particle size of less than 150mm are screened out by a feeding machine with a screen mesh, the materials are conveyed to a soil removal screen with the aperture of 20mm by a belt conveyor to screen out the materials with the particle size of less than 20mm, the materials are conveyed to a waste material pile by the belt conveyor, and the materials are reclaimed for green mine construction or conveyed to a limestone pre-homogenizing field for raw material production;
the rest materials (20-150mm) on the soil removing sieve are sent into a plate crusher by a belt conveyor, mixed with the coarsely crushed materials and sent into a sieve for sieving.
Step 2: firstly coarsely crushing limestone entering the crusher, mixing the coarsely crushed limestone with the rest materials on the soil removing sieve in the step 1, conveying the mixed aggregate to a first sieve (a second-layer sieve) by a belt conveyor for screening, conveying the material which is larger than the upper-layer sieve screen by 28.5mm into a second platen crusher by a belt conveyor for re-crushing, then falling into the belt conveyor for closed-loop circulating screening, conveying the material by one path of 5-28.5mm and conveying the material by one path of 0-5mm, and conveying the crushed aggregate to a cone type or impact type crusher by the belt conveyor for fine crushing;
and step 3: shaping, screening out a part of powder with the particle size of 0-5mm, and directly conveying the powder into a warehouse for storage; conveying the materials with the particle size of 5-28.5mm to shaping by a belt conveyor, or directly conveying the materials to a second section of the top of a finished product warehouse by a bypass for screening;
and 4, step 4: secondary screening, wherein the materials enter a second vibrating screen (a three-layer screen) through a belt conveyor, stones with the grain diameters of 22-28.5mm, 10-22mm, 5-10mm and 0-5mm are respectively conveyed into a finished product warehouse for storage, and finished aggregate and powder sand materials are loaded on bulk equipment arranged at the bottom of the warehouse and transported out of the factory or conveyed to a cement line limestone pre-homogenization yard through the belt conveyor at the bottom of the finished product warehouse;
and 5: making sand, feeding the materials with the particle size of 0-4.75mm into an unpowered sieve (gravity classifier) by a belt conveyor, separating redundant powder with the particle size of 0-0.15mm, collecting the powder by dust collection, feeding the powder into a powder warehouse, and feeding the materials out of the unpowered sieve into a sand making machine; selecting a vertical shaft impact crusher for sand making operation, adjusting the content of stone powder by using dust removal equipment, screening materials out of the sand making machine by using a screening machine, conveying the materials with the particle size smaller than 2.5mm and the part of 2.5-4.75mm, which are screened by using the screening machine, to a combined powder selecting machine for separation, selecting finished product machine-made sand and stone powder, and returning the screened materials with the particle size larger than 2.5mm to a shaping machine for closed-loop sand making;
step 6: humidifying, namely humidifying the prepared machine-made sand by adopting a spraying system to ensure that the machine-made sand has proper water content and is prevented from segregation;
and 7: and 6, conveying the humidified finished product machine-made sand to a storage bin through a belt conveyor to obtain a finished product.
Preferably, the environment-friendly waste limestone recycling dry sand making method is characterized by comprising the following steps: in the links of crushing and screening in the steps 1-6, the parts generating the raised dust are provided with dry fog dust suppression systems.
Preferably, the environment-friendly waste limestone recycling dry sand making method is characterized by comprising the following steps: the dry fog dust suppression system comprises a dust collection pipeline and a fog pipeline.
Compared with the prior art, the invention has the beneficial effects that: the production process is advanced, a complete process of a two-section impact crusher, a shaping machine, a screening machine, mud removal and sand making is adopted, the production process is safe, stable, environment-friendly and sanitary, and the production line is at the leading level in China, a fine aggregate machine sand making production line is closed by a factory building, and related dust raising points can be closed by a dust collector and a dry fog dust suppression device, so that waste limestone can be efficiently recycled, dust raising is reduced, and the production process is more environment-friendly.
Drawings
FIG. 1 is a flow chart of the waste limestone recycling process of the present invention;
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1, the present invention provides the following technical solutions: an environment-friendly dry-method sand making method by recycling waste limestone comprises the following steps:
step 1: waste limestone is conveyed into a material bin through a transport vehicle, and the limestone entering the material bin is uniformly conveyed into a plate-type crusher through a screen feeding machine with a gap of 150 mm;
after materials with the particle size of less than 150mm are screened out by a feeding machine with a screen mesh, the materials are conveyed to a soil removal screen with the aperture of 20mm by a belt conveyor to screen out the materials with the particle size of less than 20mm, the materials are conveyed to a waste material pile by the belt conveyor, and the materials are reclaimed for green mine construction or conveyed to a limestone pre-homogenizing field for raw material production;
the rest materials (20-150mm) on the soil removing sieve are sent into a plate crusher by a belt conveyor, mixed with the coarsely crushed materials and sent into a sieve for sieving.
Step 2: firstly coarsely crushing limestone entering the crusher, mixing the coarsely crushed limestone with the rest materials on the soil removing sieve in the step 1, conveying the mixed aggregate to a first sieve (a second-layer sieve) by a belt conveyor for screening, conveying the material which is larger than the upper-layer sieve screen by 28.5mm into a second platen crusher by a belt conveyor for re-crushing, then falling into the belt conveyor for closed-loop circulating screening, conveying the material by one path of 5-28.5mm and conveying the material by one path of 0-5mm, and conveying the crushed aggregate to a cone type or impact type crusher by the belt conveyor for fine crushing;
and step 3: shaping, screening out a part of powder with the particle size of 0-5mm, and directly conveying the powder into a warehouse for storage; conveying the materials with the particle size of 5-28.5mm to shaping by a belt conveyor, or directly conveying the materials to a second section of the top of a finished product warehouse by a bypass for screening;
and 4, step 4: secondary screening, wherein the materials enter a second vibrating screen (a three-layer screen) through a belt conveyor, stones with the grain diameters of 22-28.5mm, 10-22mm, 5-10mm and 0-5mm are respectively conveyed into a finished product warehouse for storage, and finished aggregate and powder sand materials are loaded on bulk equipment arranged at the bottom of the warehouse and transported out of the factory or conveyed to a cement line limestone pre-homogenization yard through the belt conveyor at the bottom of the finished product warehouse;
and 5: making sand, feeding the materials with the particle size of 0-4.75mm into an unpowered sieve (gravity classifier) by a belt conveyor, separating redundant powder with the particle size of 0-0.15mm, collecting the powder by dust collection, feeding the powder into a powder warehouse, and feeding the materials out of the unpowered sieve into a sand making machine; selecting a vertical shaft impact crusher for sand making operation, adjusting the content of stone powder by using dust removal equipment, screening materials out of the sand making machine by using a screening machine, conveying the materials with the particle size smaller than 2.5mm and the part of 2.5-4.75mm, which are screened by using the screening machine, to a combined powder selecting machine for separation, selecting finished product machine-made sand and stone powder, and returning the screened materials with the particle size larger than 2.5mm to a shaping machine for closed-loop sand making;
step 6: humidifying, namely humidifying the prepared machine-made sand by adopting a spraying system to ensure that the machine-made sand has proper water content and is prevented from segregation;
and 7: and 6, conveying the humidified finished product machine-made sand to a storage bin through a belt conveyor to obtain a finished product.
In order to protect the environment and reduce the dust pollution, in this embodiment, preferably, in the links related to crushing and screening in steps 1 to 6, the parts generating the dust are provided with a dry fog dust suppression system.
In order to enable the dry fog dust suppression system to comprehensively treat the fugitive dust, in this embodiment, the dry fog dust suppression system preferably includes a dust collection pipeline and a fog pipeline.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. An environment-friendly dry-method sand making method by recycling waste limestone comprises the following steps:
step 1: waste limestone is conveyed into a material bin through a transport vehicle, and the limestone entering the material bin is uniformly conveyed into a plate-type crusher through a screen feeding machine with a gap of 150 mm;
after the materials with the particle size of less than 150mm are screened out by a feeding machine with a screen mesh, the materials are conveyed to a soil removal screen with the aperture of 20mm by a belt conveyor, and the materials with the particle size of less than 20mm are screened out;
the rest materials (20-150mm) on the soil removing sieve are sent into a plate crusher by a belt conveyor, mixed with the coarsely crushed materials and sent into a sieve for sieving.
Step 2: firstly coarsely crushing limestone entering the crusher, mixing the coarsely crushed limestone with the rest materials on the soil removing sieve in the step 1, conveying the mixed aggregate to a first sieve (a second-layer sieve) by a belt conveyor for screening, conveying the material which is larger than the upper-layer sieve screen by 28.5mm into a second platen crusher by a belt conveyor for re-crushing, then falling into the belt conveyor for closed-loop circulating screening, conveying the material by one path of 5-28.5mm and conveying the material by one path of 0-5mm, and conveying the crushed aggregate to a cone type or impact type crusher by the belt conveyor for fine crushing;
and step 3: shaping, screening out a part of powder with the particle size of 0-5mm, and directly conveying the powder into a warehouse for storage; conveying the materials with the particle size of 5-28.5mm to shaping by a belt conveyor, or directly conveying the materials to a second section of the top of a finished product warehouse by a bypass for screening;
and 4, step 4: secondary screening, wherein the materials enter a second vibrating screen (a three-layer screen) through a belt conveyor, stones with the grain diameters of 22-28.5mm, 10-22mm, 5-10mm and 0-5mm are respectively conveyed into a finished product warehouse for storage, and finished aggregate and powder sand materials are loaded on bulk equipment arranged at the bottom of the warehouse and transported out of the factory or conveyed to a cement line limestone pre-homogenization yard through the belt conveyor at the bottom of the finished product warehouse;
and 5: making sand, feeding the materials with the particle size of 0-4.75mm into an unpowered sieve (gravity classifier) by a belt conveyor, separating redundant powder with the particle size of 0-0.15mm, collecting the powder by dust collection, feeding the powder into a powder warehouse, and feeding the materials out of the unpowered sieve into a sand making machine; selecting a vertical shaft impact crusher for sand making operation, adjusting the content of stone powder by using dust removal equipment, screening materials out of the sand making machine by using a screening machine, conveying the materials with the particle size smaller than 2.5mm and the part of 2.5-4.75mm, which are screened by using the screening machine, to a combined powder selecting machine for separation, selecting finished product machine-made sand and stone powder, and returning the screened materials with the particle size larger than 2.5mm to a shaping machine for closed-loop sand making;
step 6: humidifying, namely humidifying the prepared machine-made sand by adopting a spraying system to ensure that the machine-made sand has proper water content and is prevented from segregation;
and 7: and 6, conveying the humidified finished product machine-made sand to a storage bin through a belt conveyor to obtain a finished product.
2. The environment-friendly dry-method sand making method by recycling waste limestone as claimed in claim 1, characterized in that: in the links of crushing and screening in the steps 1-6, the parts generating the raised dust are provided with dry fog dust suppression systems.
3. The environment-friendly dry-method sand making method by recycling waste limestone as claimed in claim 2, characterized in that: the dry fog dust suppression system comprises a dust collection pipeline and a fog pipeline.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010270757.8A CN111530597A (en) | 2020-04-08 | 2020-04-08 | Dry sand making method by environment-friendly recycling of waste limestone |
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| CN202010270757.8A CN111530597A (en) | 2020-04-08 | 2020-04-08 | Dry sand making method by environment-friendly recycling of waste limestone |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112624648A (en) * | 2020-12-28 | 2021-04-09 | 中国水利水电第九工程局有限公司 | Three-level mud powder production process |
| CN112619855A (en) * | 2020-12-25 | 2021-04-09 | 日昌升建筑新材料设计研究院有限公司 | Dry-process sandstone combined production process |
| CN112892819A (en) * | 2021-01-14 | 2021-06-04 | 中铁四局集团第二工程有限公司 | Construction process for dry-method sand making production of cyclone machine |
| CN113042172A (en) * | 2021-03-31 | 2021-06-29 | 山西水务集团建设投资有限公司 | Intelligent system for converting coal gangue solid waste into building materials |
| CN113262866A (en) * | 2021-05-15 | 2021-08-17 | 亚泰集团伊通水泥有限公司 | Process for preparing sand by using limestone of cement plant and limestone of mine |
| CN114405647A (en) * | 2022-02-08 | 2022-04-29 | 孙勇 | Preparation system of building regeneration fine aggregate and computer storage medium |
| 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 |
| CN115400853A (en) * | 2021-05-26 | 2022-11-29 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Machine-made sand modular production process for prestressed concrete structure based on coarse aggregate shaping |
| CN116592450A (en) * | 2023-05-22 | 2023-08-15 | 浙江交工江欣矿业有限公司 | Ventilation and dust removal system and method for construction aggregate production line |
| CN116969700A (en) * | 2023-06-27 | 2023-10-31 | 涟源海螺水泥有限公司 | A stone powder recycling and reuse system |
| CN118809826A (en) * | 2024-07-31 | 2024-10-22 | 青岛海州重工机械有限公司 | A coal gangue sand making and mortar production line process |
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