CN114260287B - Large-scale construction waste classification disposal process - Google Patents
Large-scale construction waste classification disposal process Download PDFInfo
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- CN114260287B CN114260287B CN202111613287.1A CN202111613287A CN114260287B CN 114260287 B CN114260287 B CN 114260287B CN 202111613287 A CN202111613287 A CN 202111613287A CN 114260287 B CN114260287 B CN 114260287B
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- 239000002699 waste material Substances 0.000 title claims abstract description 83
- 238000010276 construction Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000004567 concrete Substances 0.000 claims abstract description 47
- 239000000463 material Substances 0.000 claims abstract description 40
- 239000002245 particle Substances 0.000 claims abstract description 39
- 238000012216 screening Methods 0.000 claims abstract description 34
- 239000011449 brick Substances 0.000 claims abstract description 23
- 239000004927 clay Substances 0.000 claims abstract description 21
- 239000010813 municipal solid waste Substances 0.000 claims abstract description 15
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 10
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims abstract description 6
- 238000010008 shearing Methods 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 13
- 238000003860 storage Methods 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 8
- 239000002893 slag Substances 0.000 claims description 5
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 239000012535 impurity Substances 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 3
- 239000002910 solid waste Substances 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000002184 metal Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007885 magnetic separation Methods 0.000 description 1
- 239000006148 magnetic separator Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- -1 wall skin Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
- Y02W30/58—Construction or demolition [C&D] waste
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- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the field of resource utilization of solid wastes, and particularly relates to a large-scale construction waste classification disposal process. Preliminarily classifying the building waste residues into mixed building waste including clay bricks and mortar and concrete massive building waste residues; pre-crushing large building waste residues, shearing exposed reinforcing steel bars, conveying part of the waste residues to a jaw crusher and a reaction crusher for crushing, screening part of the waste residues, and separating materials with larger particle sizes from materials with smaller particle sizes; sorting out non-building impurities from the mixed building garbage, then conveying the mixed building garbage to a back-impact crusher for crushing, conveying the crushed mixed building garbage to a primary vibrating screening machine for screening to obtain materials with different particle sizes, and respectively recycling the materials according to different particle sizes. The invention can realize scientific classification, fully play the roles of different building garbage properties, improve the added value of the recycled material, and has the advantages of low classification cost, high disposal efficiency, low energy consumption, diversified recycled material products and high market value of the recycled material obtained by treatment.
Description
Technical Field
The invention belongs to the field of resource utilization of solid wastes, and particularly relates to a large-scale construction waste classification disposal process.
Background
The house building garbage of 100 hundred million tons (about) is generated in the future 20 years of China, most of the house building garbage is brick-concrete structure building garbage constructed before the 90 th of the last century, the main component of the building garbage is sintered clay bricks, the building garbage accounts for about 40-60%, and then concrete, mortar, wall skin, waste glass, waste ceramic, steel bars, wood blocks and other impurities are mixed, and most of the concrete building garbage is waste prestressed reinforced concrete floors. As the house building garbage waste clay brick in China is the leading component, the recycled aggregate contains a large amount of broken bricks, and is generally not suitable for being used as structural concrete, so the application range is narrow.
For a long time, the construction waste recycling industry in China adopts the aggregate preparation technology of sand and stone (machine-made sand and pebble) production lines to crush the construction waste, does not realize classification disposal, does not realize full play of the properties of different construction waste, and because the strength and hardness of the sintered clay brick and the concrete are different, the impact type crushing and mixing of the construction waste is adopted, the disposal efficiency is greatly reduced, the disposal energy consumption is high, and the obtained recycled material has poor quality and low value. Therefore, the sandstone aggregate production line is difficult to bear the large-scale construction waste disposal task.
Disclosure of Invention
In order to overcome the technical defect of disposing construction wastes in the traditional sandstone production line, the invention aims to provide a large-scale construction waste classification disposal process, which can realize scientific classification, fully exert the properties and effects of different construction wastes, improve the additional value of a recycled material, and has the advantages of low classification cost, high disposal efficiency, low energy consumption, diversification of the obtained recycled material product and high market value of the recycled material obtained by treatment.
The invention provides a large-scale construction waste classification disposal process, which comprises the following steps:
(1) Preliminarily classifying the building waste residues into mixed building waste including clay bricks and mortar and concrete massive building waste residues;
(2) Pre-crushing large building waste residues, shearing exposed reinforcing steel bars, conveying one part of the waste residues to a jaw crusher and a reaction crusher for crushing, screening the other part of the waste residues by a secondary vibrating screening machine, separating materials with larger particle sizes from materials with smaller particle sizes, treating the materials with larger particle sizes by a high-pressure roller mill, and conveying the materials to the secondary vibrating screening machine for continuous screening;
(3) Sorting out non-building sundries from mixed building garbage including clay bricks, and then conveying the non-building sundries to a back-impact crusher for crushing;
(4) After being crushed by the impact crusher, the materials are sent to a first-stage vibrating screening machine for screening to obtain materials with different particle sizes, and the materials are respectively recycled according to different particle sizes.
Preferably, step (1) is: and (3) picking the large concrete with the thickness of more than 500mm by using a crawler-type mechanical gripper, and separating mixed construction waste including clay bricks and mortar from the concrete large building waste residues.
Preferably, in the step (2), the large building waste residues are pre-crushed by a hydraulic crushing hammer or a pneumatic crushing hammer, the exposed steel bars are cut off, the part with the particle size of more than 300mm is sent to a jaw crusher and an impact crusher to be crushed, and the part with the particle size of less than 300mm is screened by a secondary vibrating screening machine.
Preferably, the secondary vibrating screening machine in the step (2) screens to obtain recycled aggregate with the particle size of less than 2mm, recycled aggregate with the particle size of 2-4.75mm and recycled aggregate with the particle size of more than 4.75mm, the recycled aggregate with the particle size of more than 4.75mm is processed by a high-pressure roller mill and is sent to the secondary vibrating screening machine for continuous screening.
Preferably, step (3) is: the mixed construction waste including clay bricks is manually sorted out to obtain non-construction sundries, and then the non-construction sundries are conveyed to a back-beating type crusher for crushing by a vibrating feeder through a belt conveyor.
Preferably, in the step (4), the primary vibrating screening machine screens the materials to obtain the following materials with different particle sizes, wherein the particle size is represented by R: r <5mm mixed aggregate, R >31.5mm mixed aggregate, R <10mm mixed aggregate of 5-10 mm, R < 31.5mm mixed aggregate of 10-10 mm.
Preferably, the mixed aggregate with the R <5mm is sent to an aggregate storage shed through a belt conveyor to be used as production stock to be used as the fine aggregate of the lightweight aggregate concrete product.
Preferably, the mixed aggregate with the R of more than or equal to 5 and less than 10mm is conveyed to an aggregate storage shed through a belt conveyor to be used as production stock and used as the coarse aggregate of the lightweight aggregate concrete product.
Preferably, a part of the mixed aggregate with R >31.5mm is sent out by a belt conveyor to be used as road cushion aggregate, and the other part of the mixed aggregate is returned to the impact crusher by the belt conveyor to be continuously processed.
Preferably, one part of the mixed aggregate with the R of 10-31.5 mm is used as road concrete or slag building powder, and the other part is sent to a high-pressure roller mill for processing.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention can realize scientific classification: according to the invention, the sintered clay brick mixed construction waste and the concrete are classified and treated, the properties of the sintered clay brick construction waste and the concrete construction waste are different, the classification treatment fully exerts the properties of different construction waste, and the concrete recycled aggregate, the coarse aggregate, the fine aggregate and the building slag powder with different particle sizes are respectively obtained after treatment, so that the obtained recycled material product is diversified, the properties of different construction waste are fully exerted, the added value of the recycled material is improved, the application range of the recycled material is expanded, the diversified product is suitable for diversified markets, and the large-scale construction waste treatment is realized.
(2) The invention has low classification cost: the separation of the reinforcing steel bars and the concrete cannot be realized by the common jaw cracking of large concrete such as long concrete beams and columns. The invention adopts the mechanical gripper to pick the large concrete, preliminarily classifies the building waste residues into mixed building waste including clay bricks and mortar and concrete large building waste residues, and has low classification cost.
(3) The treatment efficiency is high: the treatment process provided by the invention has the advantages that the crushing ratio reaches 500-1000, and the recovery rate is high.
(4) The invention has low energy consumption: the average energy consumption of the recycled aggregate obtained by processing the bulk concrete is 3 kw.h/t, and the average energy consumption of the recycled powder obtained by processing the mixed construction waste is 6 kw.h/t.
(5) The regenerated material obtained by the treatment process has high market value: the obtained recycled coarse aggregates with different particle sizes do not contain sintered clay bricks any more, are pure and can be completely used for the production of commercial concrete; the mixed construction waste including clay brick and mortar is made into powder with different grain sizes, which is convenient for cement factories to use as mixed material and can be used as mortar and wall material raw material.
(6) The invention can meet the requirement of construction waste disposal: the floor and roof of the house built in the past 90 years of the last century in China mostly adopt prestressed reinforcement floors, usually 100 ten thousand tons of brick-concrete structure construction wastes and 1 ten thousand tons of prestressed thin steel bars, after the prestressed floor is pre-crushed, large blocks of concrete with the diameter of about 100mm are still partially attached to the prestressed reinforcement, and the prestressed thin steel bars and the concrete are not completely separated. The invention shears the exposed reinforcing steel bars, then sends part of the reinforcing steel bars to a jaw crusher and a counter-impact crusher for crushing, basically strips the concrete on the reinforcing steel bars, eliminates metal objects through a mechanical (magnetic separator or manual sorting), and obtains pure materials which can be directly used as building raw materials.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a process flow diagram of an embodiment of the invention.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Taking a large-scale construction waste recycling plant of 100 ten thousand tons/year as an example, the plant occupies 5 ten thousand square meters and 2 ten thousand square meters of construction waste storage yards, wherein one fifth of the construction waste storage yards is pure concrete (road concrete and the like), and four fifths of the construction waste storage yards is a mixed construction waste storage yard; 1 ten thousand square meters of disposal site; 1 ten thousand square meters finished product storage yard; other 1 ten thousand square meters of traffic area, production, life, office supporting facilities.
A large-scale construction waste sorting disposal process is shown in figure 1 and comprises the following steps:
(1) The construction waste is placed in an initial classification mode when being transported to a factory, the construction waste is picked by a crawler-type mechanical gripper (a crawler-type excavator excavating bucket is replaced by a mechanical gripper) to form large concrete blocks of about 500mm, the rest of the construction waste is mixed construction waste mainly comprising sintered clay bricks, and the mixed construction waste comprising clay bricks and mortar is separated from the large concrete construction waste and stacked separately. After the preliminary classification, the content of the waste bricks in the mixed construction waste is relatively high, and the main component in the bulk concrete is the waste concrete;
(2) Crushing the large building waste residues by adopting a hydraulic or pneumatic crushing hammer, shearing exposed reinforcing steel bars, conveying the large building waste residues with the particle size of more than 300mm to a jaw crusher for crushing by a belt conveyor through a vibrating feeder, screening by a secondary vibrating screening machine with the particle size of less than 300mm to obtain regenerated aggregate with the particle size of less than 2mm, regenerated aggregate with the particle size of 2-4.75mm and regenerated aggregate with the particle size of more than 4.75mm, treating the regenerated aggregate with the particle size of more than 4.75 by a high-pressure roller mill, and conveying to the secondary vibrating screening machine for continuous screening by the belt conveyor;
(3) Manually sorting non-building sundries such as broken cloth, wood, plastics, reinforcing steel bars and the like from mixed building garbage including clay bricks; then the materials are conveyed to a reaction crusher by a vibration feeder through a belt conveyor to be crushed, and a magnetic separation device is arranged above the conveyed belt conveyor and is used for removing metal impurities such as small steel bars, binding wires and the like;
(4) After being crushed by a reaction crusher, the materials are sent to a primary vibrating screening machine for screening by a belt conveyer to obtain the following materials with different grain diameters, wherein the grain diameter is represented by R: r <5mm mixed aggregate, R >31.5mm mixed aggregate, R <10mm mixed aggregate with the thickness of 5-31.5 mm, R <10mm mixed aggregate with the thickness of 10-31.5 mm; wherein: conveying the mixed aggregate with the R of less than 5mm to an aggregate storage shed through a belt conveyor to be used as a production stock and a fine aggregate of a lightweight aggregate concrete product; conveying the mixed aggregate with the R being more than or equal to 5 and less than or equal to 10mm to an aggregate storage shed through a belt conveyor to be used as production stock and used as coarse aggregate of a lightweight aggregate concrete product; one part of the mixed aggregate with the R being more than 31.5mm is sent out through a belt conveyor to be used as road cushion aggregate, and the other part of the mixed aggregate returns to the impact crusher through the belt conveyor to be continuously treated; and the part of the mixed aggregate with the R being more than or equal to 10 and less than or equal to 31.5mm is used as road concrete or slag building powder, and the part of the mixed aggregate is conveyed to a high-pressure roller mill through a belt conveyor for treatment.
According to the recycled concrete coarse aggregate production line, the crushing equipment main machine is a production line consisting of a jaw crusher and an impact crusher. The method can realize scientific classification: the method comprises the steps of classifying and disposing the sintered clay brick mixed construction waste and concrete, fully playing the roles of different construction waste materials, and respectively obtaining concrete recycled aggregate, light aggregate concrete product coarse aggregate, light aggregate concrete product fine aggregate, road cushion aggregate and building slag powder with different particle sizes after treatment, thereby fully playing the roles of different construction waste materials, improving the additional value of the recycled material and expanding the application range of the recycled material. The method has a crushing ratio of 500-1000 and high recovery rate. The average energy consumption of the recycled aggregate obtained by processing the bulk concrete is 3 kw.h/t, and the average energy consumption of the recycled powder obtained by processing the mixed construction waste is 6 kw.h/t.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A large-scale construction waste classification disposal process is characterized by comprising the following steps: the method comprises the following steps:
(1) Preliminarily classifying the building waste residues into mixed building waste including clay bricks and mortar and concrete massive building waste residues;
(2) Pre-crushing large building waste residues, shearing exposed reinforcing steel bars, conveying one part of the waste residues to a jaw crusher and a reaction crusher for crushing, screening the other part of the waste residues by a secondary vibrating screening machine, separating materials with larger particle sizes from materials with smaller particle sizes, treating the materials with larger particle sizes by a high-pressure roller mill, and conveying the materials to the secondary vibrating screening machine for continuous screening;
(3) Sorting out non-building sundries from mixed building garbage including clay bricks, and then conveying the mixed building garbage to a back-impact crusher for crushing;
(4) After being crushed by a back-impact crusher, the crushed materials are sent to a first-stage vibrating screening machine for screening to obtain materials with different particle sizes, and the materials are respectively recycled according to different particle sizes;
pre-crushing the large building waste residues by adopting a hydraulic breaking hammer or a pneumatic breaking hammer, shearing exposed reinforcing steel bars, sending the part with the particle size of more than 300mm to a jaw crusher and a reaction crusher for crushing, and screening the part with the particle size of less than 300mm by a secondary vibrating screening machine;
screening by using a secondary vibrating screening machine in the step (2) to obtain recycled aggregate with the particle size of less than 2mm, recycled aggregate with the particle size of 2-4.75mm and recycled aggregate with the particle size of more than 4.75mm, treating the recycled aggregate with the particle size of more than 4.75mm by using a high-pressure roller mill, and conveying to the secondary vibrating screening machine for continuous screening;
screening by using a primary vibrating screening machine in the step (4) to obtain the following materials with different particle sizes, wherein the particle size is represented by R: the mixed aggregate with the R being less than 5mm, the mixed aggregate with the R being more than 31.5mm, the mixed aggregate with the R being more than or equal to 5mm and less than or equal to 10mm, the mixed aggregate with the R being more than or equal to 10mm and less than or equal to 31.5mm, one part of the mixed aggregate with the R being more than or equal to 10mm and less than or equal to 31.5mm is used as road concrete or slag building powder, and the other part is sent to a high-pressure roller mill for processing.
2. The process for the classified disposal of large-scale construction waste according to claim 1, wherein: the step (1) is as follows: and (3) picking large concrete with the thickness of more than 500mm by using a crawler-type mechanical gripper, and separating mixed construction waste including clay bricks and mortar from the concrete large building waste residues.
3. The process for the classified disposal of large-scale construction waste according to claim 1, wherein: the step (3) is as follows: the mixed construction waste including clay bricks is manually sorted out of non-construction sundries and then is conveyed to a back-impact crusher for crushing by a vibration feeder through a belt conveyor.
4. The process for the classified disposal of large-scale construction waste according to claim 1, wherein: and conveying the mixed aggregate with the R <5mm to an aggregate storage shed through a belt conveyor to be used as production stock and used as fine aggregate of the lightweight aggregate concrete product.
5. The process for the classified disposal of large-scale construction waste according to claim 1, wherein: and conveying the mixed aggregate with the R of more than or equal to 5 and less than 10mm to an aggregate storage shed through a belt conveyor to be used as production stock and used as the coarse aggregate of the lightweight aggregate concrete product.
6. The process for the classified disposal of large-scale construction waste according to claim 1, wherein: and one part of the mixed aggregate with the R being more than 31.5mm is sent out by the belt conveyor to be used as road cushion aggregate, and the other part of the mixed aggregate is returned to the impact crusher by the belt conveyor to be continuously treated.
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| CN116000071B (en) * | 2023-01-31 | 2024-08-09 | 中建八局第一建设有限公司 | Foundation pit supporting concrete beam slab dismantling, classifying and recycling and construction method thereof |
| CN116251820A (en) * | 2023-03-13 | 2023-06-13 | 浙江维克机械科技有限公司 | Construction waste treatment system and method |
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| DE3407557A1 (en) * | 1984-03-01 | 1985-09-05 | Joachim 5000 Köln Auerbach | Lightweight concrete mixture |
| DE3546431A1 (en) * | 1985-07-19 | 1987-01-29 | Gerhard Meyer | BUILDING, CALLED SORTING, PROCESSING AND SHIPPING BUILDING, FOR THE REUSE OF PRE-SORTED AND OTHER-DELIVERED WASTE FROM PRIVATE AND COMMERCIAL HOUSEHOLD |
| CN101099974B (en) * | 2007-05-22 | 2011-04-06 | 华南理工大学 | Method for treating and regenerating reuse building waste |
| CN101250033A (en) * | 2008-03-31 | 2008-08-27 | 洛阳理工学院 | Method and device for recycling waste concrete |
| CN101549351B (en) * | 2009-05-08 | 2012-03-14 | 深圳市绿发鹏程环保科技有限公司 | Building refuse treatment regeneration system |
| CN201511034U (en) * | 2009-05-08 | 2010-06-23 | 深圳市绿发鹏程环保科技有限公司 | Construction waste treatment recycling system |
| CN102476943A (en) * | 2010-11-22 | 2012-05-30 | 大连创达技术交易市场有限公司 | Municipal refuse treatment method of curing process |
| JP4712909B1 (en) * | 2010-11-25 | 2011-06-29 | 株式会社山▲崎▼砂利商店 | Waste material separation equipment |
| JP4846876B1 (en) * | 2011-01-28 | 2011-12-28 | 株式会社大協組 | Manufacturing method of materials made from incinerated ash |
| CN105688651B (en) * | 2016-01-28 | 2019-04-12 | 华中科技大学 | The demercuration adsorption method of boiler smoke and the regeneration method of discarded concrete |
| CN206535848U (en) * | 2016-12-30 | 2017-10-03 | 武汉都市环保工程技术股份有限公司 | Building waste processing system |
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| CN106944453A (en) * | 2017-02-07 | 2017-07-14 | 江苏江达生态环境科技有限公司 | The processing of building waste and regeneration method |
| CN107377584A (en) * | 2017-07-26 | 2017-11-24 | 赵长强 | Building waste recycling method |
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| CN109604298A (en) * | 2018-11-09 | 2019-04-12 | 浙江精东环境建设有限公司 | A kind of environment-friendly type building garbage treating process |
| CN109678378A (en) * | 2019-03-08 | 2019-04-26 | 泗县惠赐建材有限公司 | A kind of application of building waste treatment process and gained recycled aggregate |
| DK180182B1 (en) * | 2019-07-17 | 2020-07-16 | Ar Tranberg As | Waste handling system |
| CN111112288A (en) * | 2019-12-19 | 2020-05-08 | 南京星佛管业有限公司 | Method for recycling construction waste with high recycling rate |
| CN111393059A (en) * | 2020-03-25 | 2020-07-10 | 深圳绿景环保再生资源有限公司 | Building solid waste superfine aggregate grading process |
| CN112371702B (en) * | 2020-11-18 | 2021-11-09 | 四川兴城港瑞建材有限公司 | Layout and operation method of waste concrete block crushing device |
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