CN114769275A - Construction waste foamed concrete screening method and screening equipment - Google Patents
Construction waste foamed concrete screening method and screening equipment Download PDFInfo
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- CN114769275A CN114769275A CN202210537150.0A CN202210537150A CN114769275A CN 114769275 A CN114769275 A CN 114769275A CN 202210537150 A CN202210537150 A CN 202210537150A CN 114769275 A CN114769275 A CN 114769275A
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- screening
- construction waste
- foamed concrete
- aggregate
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- 239000002699 waste material Substances 0.000 title claims abstract description 68
- 238000012216 screening Methods 0.000 title claims abstract description 65
- 238000010276 construction Methods 0.000 title claims abstract description 55
- 239000011381 foam concrete Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000000126 substance Substances 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims description 44
- 238000001125 extrusion Methods 0.000 claims description 27
- 239000002245 particle Substances 0.000 claims description 24
- 239000000843 powder Substances 0.000 claims description 17
- 238000007885 magnetic separation Methods 0.000 claims description 16
- 230000005484 gravity Effects 0.000 claims description 13
- 239000004567 concrete Substances 0.000 claims description 12
- 238000005187 foaming Methods 0.000 claims description 10
- 239000010813 municipal solid waste Substances 0.000 claims description 7
- 239000004744 fabric Substances 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 3
- 239000004576 sand Substances 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 2
- 239000000696 magnetic material Substances 0.000 claims description 2
- 238000004064 recycling Methods 0.000 abstract description 7
- 239000004033 plastic Substances 0.000 abstract description 5
- 229920003023 plastic Polymers 0.000 abstract description 5
- 239000002023 wood Substances 0.000 abstract description 5
- 239000000446 fuel Substances 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 abstract description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000011449 brick Substances 0.000 description 3
- 238000005034 decoration Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000007796 conventional method Methods 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
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000010814 metallic waste Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B15/00—Combinations of apparatus for separating solids from solids by dry methods applicable to bulk material, e.g. loose articles fit to be handled like bulk material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to the technical field of construction waste classification treatment, and relates to a method and equipment for screening foamed concrete in construction waste. The method and the device for screening out the foamed concrete in the construction waste are an improvement on the traditional construction waste recycling method, wood, plastic blocks, foamed concrete and the like in the construction waste recycled aggregate are firstly taken as light substances to be distinguished, and the foamed concrete in the output light substances is further removed to obtain combustible light substance fuel. The light substances without the foamed concrete can be used for incineration power generation and other purposes, so that the incineration efficiency of the combustible light substances is improved. The method and the equipment for screening the foamed concrete in the construction waste have the advantages of reasonable design, high utilization rate of the recycled raw materials and high purity of the product, improve the value of the recycled aggregate of the construction waste and realize the maximum utilization of resources.
Description
Technical Field
The invention belongs to the technical field of construction waste classification treatment, and relates to a method and equipment for screening foamed concrete in construction waste.
Background
Along with the continuous acceleration of the urbanization development and the engineering construction in China, a large amount of construction waste and decoration waste are generated, the waste causes certain pollution to the environment, and if the waste cannot be well recycled, the waste of resources can be caused. In order to realize the aims of carbon peak reaching and carbon neutralization, the recycling of the building garbage and the decoration garbage can effectively reduce the development of mineral resources and promote the recycling and sustainable development of waste resources.
In the traditional construction waste recycling process flow, house demolition waste and decoration waste are used as important components of construction waste. The construction waste mainly comprises metal, bricks and tiles, concrete, foamed concrete, plastics, wood and the like generated in the dismantling process.
The existing classification of construction waste is mainly classified according to the weight of the waste, and materials with high specific gravity such as metal, bricks and tiles and concrete can be used for aggregate resource utilization and used for manufacturing regenerated bricks or pavement base layers. Light materials such as plastics and wood with lighter specific gravity are often made into combustible fuel for burning power generation or other purposes. However, the specific gravity of the foamed concrete in the construction waste is light, and the foamed concrete can be mixed in the sorted light materials during sorting, and due to poor flammability of the foamed concrete, the mixing of the foamed concrete greatly reduces the utilization efficiency and the recycling value of the light material recycled materials. In view of this, a solution is needed to solve the problem that foamed concrete in construction waste is not easy to classify.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a method and equipment for screening foamed concrete in construction waste.
In order to realize the purpose, the method for screening the foaming concrete in the construction waste comprises the following specific steps:
firstly, crushing construction waste into uniform construction waste aggregate;
screening the building waste aggregate according to the specific gravity, and screening the building waste aggregate into three materials, namely heavy materials, undersize materials and light materials;
step three, extruding the obtained light substances, and crushing the foamed concrete in the light substances into particles or powder;
and step four, screening the crushed light substances according to the particle size, wherein the oversize is combustible light substances for screening out the foamed concrete, and the undersize is granules or powder containing the foamed concrete.
Furthermore, the particle size of the building rubbish aggregate in the first step is below 80 mm.
Further, in the step one, the construction waste recycled aggregate is subjected to magnetic separation to remove magnetic materials and then is screened according to specific gravity.
Further, in the second step, the heavy materials are subjected to secondary magnetic separation to obtain pure recycled aggregate, and undersize materials are separated into fine sand and linear impurities after being screened.
And further, in the third step, a double-roller crushing device is used for carrying out extrusion crushing treatment on the light substances, the foamed concrete in the light substances is crushed into particles or powder through extrusion, and the rest light substances are extruded and deformed or cracked to be prevented from being crushed into particles or powder.
Further, the particles or powder obtained by crushing in the third step have a particle size of 10mm or less.
Foaming concrete sieves equipment among building rubbish, including breaker, proportion screening plant, extrusion breaker, screen cloth screening plant, the last aggregate export that is equipped with of breaker, proportion screening plant and breaker's aggregate exit linkage, be equipped with heavy material discharge gate, screen underflow discharge gate and light material discharge gate on the proportion screening plant, extrusion breaker and light material exit linkage, be equipped with the material export on the extrusion breaker, screen cloth screening plant and extrusion breaker's material exit linkage.
Further, still include the magnetic separation device, the magnetic separation device sets up between breaker, proportion screening plant, and the aggregate of the follow breaker ejection of compact gets into proportion screening plant after the magnetic separation of magnetic separation device earlier.
Further, the extrusion crushing device is a double-roller crushing device.
Further, the screen screening device is a relaxation screen.
As can be seen from the above description of the present invention, compared with the prior art, the method and the apparatus for screening out the foamed concrete in the construction waste are an improvement of the conventional method for recycling the construction waste, and the combustible light material fuel is obtained by firstly distinguishing the wood, the plastic block, the foamed concrete and the like in the recycled aggregate of the construction waste as the light materials and further removing the foamed concrete in the output light materials. The light substances without the foamed concrete can be used for incineration power generation and other purposes, so that the incineration efficiency of the combustible light substances is improved. The method and the equipment for screening the foaming concrete in the construction waste have the advantages of reasonable design, high utilization rate of the recycled raw materials and high purity of the product, improve the value of the recycled aggregate of the construction waste and realize the maximum utilization of resources.
Drawings
FIG. 1 is a flow chart of a method for screening foamed concrete in construction waste.
Fig. 2 is a schematic structural diagram of a device for screening out foamed concrete in construction waste.
Detailed Description
The invention is further described below by means of specific embodiments.
Referring to the method for screening the foamed concrete in the construction waste shown in fig. 1 and 2, the method comprises the following specific steps:
firstly, crushing the construction waste into uniform construction waste aggregate, wherein the construction waste recycled aggregate is obtained by crushing, screening and other methods of the construction waste through the traditional process flow, the crushing process flow is determined according to the type of the construction waste, and the particle size of the crushed construction waste aggregate is below 80 mm;
the crushed construction waste aggregate can be subjected to primary magnetic separation, so that metal materials such as reinforcing steel bars in the construction waste aggregate are prevented from damaging the specific gravity sieve, and metal waste can be collected and utilized;
screening the building waste aggregate according to the specific gravity, screening the building waste into three materials, namely heavy materials, undersize materials and light materials, carrying out secondary magnetic separation on the heavy materials to obtain pure recycled aggregate, and screening the undersize materials to separate into fine sand and linear impurities;
thirdly, extruding the obtained light substances, and crushing the light substances by using a double-roller crushing device, wherein the foamed concrete in the light substances is crushed into particles and powder by extrusion, the particle size of the particles or powder is less than 10mm, the actual condition of the particle size of the powder is set according to the process requirement, and the rest light substances such as wood, plastic, textile and the like are not crushed into the particles and the powder by extrusion deformation or cracking;
and step four, screening the light substances after the extrusion crushing according to the particle size, wherein the oversize is combustible light substances for screening out the foamed concrete, and the undersize is particles or powder containing crushed slag, muck and the like of the foamed concrete.
According to the drawings 1 and 2, the equipment for screening the foaming concrete in the construction waste comprises a crushing device 1, a first magnetic separation device 2, a specific gravity screening device 3, an extrusion crushing device 4 and a screen screening device 5;
the crushing device 1 is provided with an aggregate outlet 11, the aggregate outlet 11 of the crushing device 1 is connected through a belt conveyor 12, and the magnetic separation device 2 is arranged on the belt conveyor and is used for carrying out magnetic separation on the building garbage aggregates before entering the specific gravity screening device 3;
one end of the belt conveyor 12 is connected with an aggregate outlet 11 of the crushing device 1, the other end of the belt conveyor is connected with a feeding hole 31 of the specific gravity screening device 3 through a vibrating feeder 13, and a heavy material discharging hole 32, a screen underflow discharging hole 33 and a light material discharging hole 34 are formed in the specific gravity screening device 3;
the extrusion crushing device 4 is a double-roller crushing device, the extrusion crushing device 4 is connected with the light material outlet 34 through a belt conveyor 14, the extrusion crushing device 4 performs extrusion crushing treatment on the light material, foamed concrete in the light material is crushed into particles and powder through extrusion, the extrusion crushing device is provided with a material outlet 41, and all materials after extrusion crushing are discharged from the material outlet 41;
the screen screening device 5 is a relaxation screen, the screen screening device 5 is connected with a material outlet of the extrusion crushing device and is used for screening fed light substances, crushed foamed concrete residues and muck are taken as undersize materials to be screened out, and combustible light substance fuel which is deformed or cracked but is not crushed into particles or powder after being extruded is reserved.
The invention relates to a method and equipment for screening out foamed concrete in construction waste, which are an improvement on the traditional construction waste recycling method.
The above description is only a few specific embodiments of the present invention, but the design concept of the present invention is not limited to the above, and any insubstantial modifications of the present invention using this concept should fall within the scope of the present invention.
Claims (10)
1. The method for screening the foamed concrete in the construction waste is characterized by comprising the following specific steps:
firstly, crushing construction waste into uniform construction waste aggregate;
screening the building waste aggregate according to the specific gravity, and screening the building waste aggregate into three materials, namely heavy materials, undersize materials and light materials;
step three, extruding the obtained light substance, and crushing the foamed concrete in the light substance into particles or powder;
and step four, screening the light substances after the extrusion crushing according to the particle size, wherein the oversize product is combustible light substances for screening out the foamed concrete, and the undersize product is granules or powder containing the foamed concrete.
2. The method for screening the foaming concrete in the construction waste according to claim 1, characterized in that: the particle size of the building garbage aggregate in the step one is below 80 mm.
3. The method for screening the foaming concrete in the construction waste according to claim 1, characterized in that: and in the first step, the construction waste recycled aggregate is subjected to magnetic separation to remove magnetic materials, and then is screened according to specific gravity.
4. The method for screening the foaming concrete in the construction waste according to claim 1, characterized in that: and in the second step, the heavy substances are magnetically separated for the second time to obtain pure recycled aggregate, and the undersize products are separated into fine sand and linear impurities after being screened.
5. The method for screening the foaming concrete in the construction waste according to claim 1, characterized in that: and in the third step, a double-roller crushing device is used for carrying out extrusion crushing treatment on the light substances, the foamed concrete in the light substances is crushed into particles or powder through extrusion, and the rest light substances are extruded to deform or crack so as not to be crushed into particles or powder.
6. The method for screening foamed concrete in construction waste according to claim 1 or 4, characterized in that: the particle size of the crushed particles or powder in the third step is less than 10 mm.
7. Foaming concrete screening equipment in building rubbish, its characterized in that: including breaker, proportion screening plant, extrusion breaker, screen cloth screening plant, be equipped with the aggregate export on the breaker, proportion screening plant and breaker's aggregate exit linkage, be equipped with heavy material discharge gate, undersize thing discharge gate and light material discharge gate on the proportion screening plant, extrusion breaker and light material exit linkage, be equipped with the material export on the extrusion breaker, screen cloth screening plant and extrusion breaker's material exit linkage.
8. The apparatus for screening out foaming concrete in construction waste as claimed in claim 7, wherein: still include the magnetic separation device, the magnetic separation device sets up between breaker, proportion screening plant, and the aggregate of the ejection of compact from the breaker gets into proportion screening plant again after the magnetic separation of magnetic separation device earlier.
9. The apparatus for screening foamed concrete in construction waste according to claim 7, characterized in that: the extrusion crushing device is a double-roller crushing device.
10. The apparatus for screening foamed concrete in construction waste according to claim 7, characterized in that: the screen mesh screening device is a relaxation screen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210537150.0A CN114769275A (en) | 2022-05-18 | 2022-05-18 | Construction waste foamed concrete screening method and screening equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210537150.0A CN114769275A (en) | 2022-05-18 | 2022-05-18 | Construction waste foamed concrete screening method and screening equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114769275A true CN114769275A (en) | 2022-07-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210537150.0A Pending CN114769275A (en) | 2022-05-18 | 2022-05-18 | Construction waste foamed concrete screening method and screening equipment |
Country Status (1)
| Country | Link |
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| CN (1) | CN114769275A (en) |
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| CN217289744U (en) * | 2022-05-18 | 2022-08-26 | 福建南方路面机械股份有限公司 | Foaming concrete screens out equipment among building rubbish |
-
2022
- 2022-05-18 CN CN202210537150.0A patent/CN114769275A/en active Pending
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|---|---|---|---|---|
| JP2003211092A (en) * | 2002-01-18 | 2003-07-29 | Fukui Keisuke | Method for recovering regenerated aggregate and regenerated road bed material by using air sorting |
| CN108746152A (en) * | 2018-05-22 | 2018-11-06 | 北京建筑大学 | A kind of method and system making construction material with aging rubbish |
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