CN114953151A - Concrete preparation production line based on building rubbish is recycled - Google Patents
Concrete preparation production line based on building rubbish is recycled Download PDFInfo
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- CN114953151A CN114953151A CN202210672398.8A CN202210672398A CN114953151A CN 114953151 A CN114953151 A CN 114953151A CN 202210672398 A CN202210672398 A CN 202210672398A CN 114953151 A CN114953151 A CN 114953151A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 39
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 239000010813 municipal solid waste Substances 0.000 title claims description 4
- 239000002253 acid Substances 0.000 claims abstract description 64
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 63
- 238000002386 leaching Methods 0.000 claims abstract description 48
- 239000002699 waste material Substances 0.000 claims abstract description 42
- 238000010276 construction Methods 0.000 claims abstract description 38
- 238000005406 washing Methods 0.000 claims abstract description 22
- 238000004064 recycling Methods 0.000 claims abstract description 19
- 238000012216 screening Methods 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract description 13
- 238000011084 recovery Methods 0.000 claims abstract description 10
- 238000004140 cleaning Methods 0.000 claims abstract description 9
- 238000005554 pickling Methods 0.000 claims abstract description 9
- 239000012535 impurity Substances 0.000 claims abstract description 8
- 239000006148 magnetic separator Substances 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 5
- 238000002156 mixing Methods 0.000 claims description 46
- 239000000463 material Substances 0.000 claims description 28
- 239000000843 powder Substances 0.000 claims description 19
- 239000012615 aggregate Substances 0.000 claims description 13
- 239000010865 sewage Substances 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 10
- 239000004568 cement Substances 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 8
- 230000002411 adverse Effects 0.000 abstract description 5
- 230000002378 acidificating effect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 12
- 239000000243 solution Substances 0.000 description 9
- 238000011282 treatment Methods 0.000 description 7
- 239000002994 raw material Substances 0.000 description 5
- 238000003756 stirring Methods 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 210000005056 cell body Anatomy 0.000 description 2
- 238000011221 initial treatment Methods 0.000 description 2
- 239000003929 acidic solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 238000003426 chemical strengthening reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000010814 metallic waste Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000053 physical method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/0007—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/04—Supplying or proportioning the ingredients
-
- 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
-
- 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
- C04B20/023—Chemical treatment
-
- 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
-
- 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
Abstract
The invention relates to the technical field of concrete preparation, in particular to a concrete preparation production line based on construction waste recycling, which comprises an aggregate recovery system and a concrete preparation system; the aggregate recovery system comprises: the magnetic separator is used for removing metal impurities in the construction waste; the sorting machine is used for removing light substances in the construction waste; the crushing and screening machine is used for crushing and screening the construction waste after impurity removal to a specified size; the aggregate cleaning machine is used for pickling and washing the screened aggregates; the primarily treated aggregate is subjected to acid leaching and washing in sequence, and then the aggregate is washed, so that residual acid solution on the aggregate can be washed away, the influence of acidic substances on the performance of the concrete caused by the acidic substances entering the concrete is avoided, the washed aggregate is directly applied to a concrete preparation system, and the adverse effect of the water absorption of the aggregate on the concrete can be avoided.
Description
Technical Field
The invention relates to the technical field of concrete preparation, in particular to a concrete preparation production line based on construction waste recycling.
Background
The construction waste left after the old building is dismantled occupies land resources and pollutes the environment, and in the process of recycling the construction waste, the construction waste is made into aggregate to replace natural aggregate, so that the construction waste can be effectively treated, the utilization of natural resources can be reduced, and the building waste recycling system has better environmental protection and energy saving performance.
The recycled aggregate has different performance parameters from the natural aggregate, and particularly, the recycled aggregate has larger gaps and higher water absorption and mud content, so that the concrete prepared from the recycled aggregate has poorer fluidity and lower compressive strength than the natural aggregate.
The existing treatment methods for the recycled aggregate comprise a chemical strengthening method and a physical strengthening method, but each method has certain limitation, the chemical method can reduce the water absorption rate of the recycled aggregate, but can reduce the bonding of cement mortar and the aggregate, reduce the later strength and the fluidity of recycled concrete, the physical method has higher energy consumption, and the grinding process has influence on the crushing index of the coarse aggregate in the recycled aggregate.
Disclosure of Invention
The invention aims to provide a concrete preparation production line based on construction waste recycling, and the concrete preparation production line can solve the following technical problems:
how to improve the effect of preparing concrete by recycled aggregate.
The purpose of the invention can be realized by the following technical scheme:
a concrete preparation production line based on construction waste recycling comprises an aggregate recovery system and a concrete preparation system;
the aggregate recovery system comprises:
the magnetic separator is used for removing metal impurities in the construction waste;
the sorting machine is used for removing light substances in the construction waste;
the crushing and screening machine is used for crushing and screening the construction waste after impurity removal to a specified size;
and the aggregate cleaning machine is used for pickling and washing the screened aggregates.
Obviously, the aggregate is subjected to acid leaching and washing treatment in sequence by the aggregate washing machine, the porosity and the water absorption of the aggregate can be reduced by acid leaching, and the acid solution remained on the aggregate can be removed by washing.
In yet another embodiment, the concrete preparation system includes:
the first mixing device is used for primarily mixing the washed aggregate, water and powder;
the second mixing device is used for primarily mixing water, cement, a water reducing agent and the residual components of the concrete;
and the concrete mixer is respectively communicated with the first mixing device and the second mixing device and is used for mixing the mixture output by the first mixing device and the second mixing device to obtain the concrete.
The washed aggregate is mixed with part of water and powder by the first mixing device, the water immersed in the aggregate can improve the bonding capacity with the powder, and the aggregate can be stably connected with the powder.
In one embodiment, the aggregate cleaning machine comprises an acid leaching component and a showering component;
the acid leaching component is used for immersing the aggregate into the acid liquor and fishing out the aggregate from the acid liquor;
the leaching component is used for washing the acid-leached aggregate.
In one embodiment, the acid leaching assembly comprises a tank body and a leaking net cage;
the net leaking box is driven by a driving force to slide into and away from the pool body relative to the pool body;
the acid leaching device is characterized in that the net leaking box is obliquely arranged, an acid leaching material outlet is formed in the bottom of one side of the net leaking box, and when the net leaking box slides to the top, the acid leaching material outlet is opened.
In one embodiment, a rotary baffle is arranged at the acid leaching outlet;
the bottom of the rotary baffle is rotationally connected with the screen leaking box;
a limiting block is arranged in the tank body;
when the net leaking box enters the tank body, the limiting block limits the rotation of the rotating baffle;
when the net leaking box completely leaves the pool body, the limiting block relieves the limiting of the rotating baffle.
In one embodiment, the shower assembly includes a material conveying rail and a water sprayer disposed above the material conveying rail;
and the feeding end of the material conveying rail is communicated with the acid leaching material outlet.
In an embodiment, the material conveying rail is provided with a water leakage net at a position corresponding to the water sprayer, and a sewage collecting box is arranged below the water leakage net.
In an embodiment, the concrete mixer is provided with two feeding ports, and the two feeding ports are respectively communicated with the discharging ports of the first mixing device and the second mixing device.
In an embodiment, the crushing and screening machine circularly crushes the aggregates according to the size proportion requirement of the aggregate particle size.
Therefore, the aggregate grain diameter output by the crushing and screening machine can be closer to the actual demand by adopting a circulating crushing mode according to the actual demand.
The invention has the beneficial effects that:
(1) according to the invention, the acid leaching and washing treatment are sequentially carried out on the primarily treated aggregate, so that the porosity and the water absorption of the aggregate can be reduced, the surface smoothness of the recycled aggregate is improved, then the acid leached aggregate is washed, so that the acid solution remained on the aggregate can be washed away, the influence of acid substances on the performance of the concrete caused by the acid substances entering the concrete is avoided, and the washed aggregate is directly applied to a concrete preparation system, so that the adverse influence of the water absorption of the aggregate on the concrete can be avoided.
(2) According to the invention, the washed aggregate is firstly mixed with part of water and powder through the first mixing device, and the water immersed in the aggregate can improve the bonding capacity with the powder, so that the aggregate and the powder can be stably connected, and the quality of prepared concrete is improved.
(3) According to the invention, the water leakage net and the sewage collection box are arranged at the position corresponding to the water sprayer of the material conveying track, and the silt on the surface of the acid-soaked aggregate is easy to loosen, so that the silt on the surface of the acid-soaked aggregate is separated from the aggregate through the water leakage net under the driving of water flow after the water sprayer is washed, and further, the silt in the aggregate can be prevented from entering the concrete, and the quality of preparing the recycled aggregate is improved.
(4) According to the invention, the aggregate grain size output by the crushing and screening machine is closer to the actual demand by adopting a circulating crushing mode according to the actual demand, so that the application range of the concrete preparation production line is widened.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic flow diagram of a concrete production line based on the recycling of construction waste according to the present invention;
FIG. 2 is a schematic view of the structure of an aggregate washer in the production line of the present invention from one perspective;
FIG. 3 is a cross-sectional view of the pickling assembly in a submerged state in the production line of the present invention;
FIG. 4 is a cross-sectional view of the pickling assembly in the production line of the present invention in a scooping state;
FIG. 5 is a schematic view of a perspective view of a concrete mixer in the production line of the present invention;
FIG. 6 is a front view of a concrete mixer in the production line of the present invention.
Description of the drawings: 1. an aggregate cleaning machine; 11. a pickling assembly; 111. a tank body; 112. a net leaking box; 113. rotating the baffle; 114. a limiting block; 12. a shower assembly; 121. a material conveying track; 122. a water sprayer; 123. a water leakage net; 124. a sewage collecting tank; 2. a concrete mixer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1, the application provides a concrete preparation production line based on construction waste recycling, which comprises an aggregate recycling system and a concrete preparation system;
the aggregate recovery system comprises:
the magnetic separator is used for removing metal impurities in the construction waste;
the sorting machine is used for removing light substances in the construction waste;
the crushing and screening machine is used for crushing and screening the construction waste after impurity removal to a specified size;
and the aggregate cleaning machine 1 is used for pickling and washing the screened aggregates.
The concrete preparation production line comprises an aggregate recovery system and a concrete preparation system, aggregates obtained by recovering construction wastes are directly applied to the preparation process of concrete, and the construction wastes left after old buildings are dismantled can be effectively utilized.
The aggregate recovery system removes metal garbage of the construction waste through the magnetic separator, and removes light substances such as wood, plastics and the like in the construction waste through the sorting machine respectively, and it needs to be noted that the magnetic separator and the sorting machine do not limit the processing sequence of the construction waste points, and then the construction waste is crushed and screened to the established size, so that the primary treatment of the aggregate can be completed.
And further, carrying out acid leaching and washing treatment on the primarily treated aggregate in sequence, wherein the acid leaching is to soak the aggregate in an acid solution, firstly, the acid leaching treatment on the aggregate can reduce the porosity and the water absorption of the aggregate and improve the surface smoothness of the regenerated aggregate, and then, washing the acid-leached aggregate, so that on one hand, the acid solution remained on the aggregate can be washed away, and the influence of an acid substance entering the concrete on the performance of the concrete is avoided, and on the more important hand, the washed aggregate absorbs water, therefore, the washed aggregate is directly applied to a concrete preparation system, and the adverse effect of the water absorption of the aggregate on the concrete can be avoided.
Referring to fig. 1, the concrete preparation system of the present application includes:
the first mixing device is used for preliminarily mixing the washed aggregate, water and powder;
the second mixing device is used for primarily mixing water, cement, a water reducing agent and the residual components of the concrete;
and the concrete mixer 2 is respectively communicated with the first mixing device and the second mixing device and is used for mixing the mixture output by the first mixing device and the mixture output by the second mixing device to obtain concrete.
This application mixes different raw materials respectively through first mixing arrangement and second mixing arrangement respectively, and the raw materials stirring of later through the concrete mixer with preliminary mixing makes the concrete.
Specifically, the first mixing device mixes the washed aggregate with part of water and powder, obviously, the water immersed in the aggregate can improve the bonding capacity with the powder, so that the aggregate and the powder can be stably connected, and the quality of prepared concrete can be improved; the second agitating unit is with the water of surplus and cement, water-reducing agent and the preliminary mixing of concrete surplus component, stirs with aggregate and powder mixture again, and then can reduce the influence that aggregate hydroscopicity led to the fact cement and water-reducing agent effect.
Referring to fig. 2 to 4, the aggregate cleaning machine 1 includes an acid leaching assembly 11 and a showering assembly 12;
the pickling assembly 11 is used for immersing the aggregate into the acid liquor and fishing out the aggregate from the acid liquor;
the rinse assembly 12 is used to rinse the leached aggregates.
As an embodiment of the present application, the aggregate cleaning machine 1 is composed of an acid leaching component 11 and a leaching component 12, wherein the acid leaching component 11 can immerse the aggregates into an acid solution, and take the aggregates out of the acid solution after the immersion is completed, and the leaching component 12 can rinse the aggregates after the aggregates are fished out of the acid solution, obviously, the processing process of the recycled aggregates can be sequentially completed through the arrangement of the aggregate cleaning machine 1.
Referring to fig. 3-4, the acid leaching assembly 11 includes a tank body 111 and a strainer box 112;
the net leaking box 112 is driven by the driving force to slide into and away from the pool body 111 relative to the pool body 111;
the strainer box 112 is obliquely arranged, an acid leaching outlet is arranged at the bottom of one side of the strainer box 112, and when the strainer box 112 slides to the top, the acid leaching outlet is opened.
As an embodiment of the present application, the acid leaching component 11 in this embodiment includes a pool body 111 and a water-permeable screen box 112 for preventing aggregates, the screen box 112 can be driven by a power structure such as a hydraulic cylinder to ascend and descend relative to the pool body 111, and then can slide into and away from the pool body 111, so as to realize the processes of soaking and scooping up the aggregates, meanwhile, the screen box 112 arranged obliquely has an acid leaching outlet at one side of the lowest position, and when the screen box 112 slides to the top, the acid leaching outlet is opened, therefore, after the acid leaching component 11 completes the acid leaching process, the aggregates can automatically slide out downwards from the acid leaching outlet under the action of self gravity, and then the aggregates automatically enter the washing process, thereby improving the convenience and automation of aggregate treatment.
The acid leaching discharge hole is provided with a rotary baffle 113;
the bottom of the rotary baffle 113 is rotatably connected with the screen leaking box 112;
a limiting block 114 is arranged in the tank body 111;
when the net leakage box 112 enters the tank body 111, the limiting block 114 limits the rotation of the rotating baffle 113;
when the net leaking box 112 completely leaves the tank body 111, the limit block 114 releases the limit of the rotating baffle 113.
Further, this application provides an implementation mode for the mode of opening of acid leaching discharge gate, it is specific, through setting up the rotation baffle 113 of being connected with leaking box with a net 112 rotation, when leaking box with a net 112 in cell body 111, stopper 114 can support and press rotation baffle 113, and then the rotation of restriction rotation baffle 113 for the acid leaching discharge gate of leaking box with a net 112 is sealed, when leaking box with a net 112 and leaving cell body 111 completely, rotation baffle 113 no longer is supported and pressed by stopper 114, consequently rotation baffle 113 can fall from the discharge gate under the action of gravity of aggregate, and then realize the effect of the automatic discharging after the acid leaching.
Referring to fig. 2, the shower assembly 12 includes a material conveying rail 121 and a water sprayer 122 disposed above the material conveying rail 121;
the feeding end of the material conveying rail 121 is communicated with the acid leaching material outlet.
As an implementation manner of the present application, the shower assembly 12 in this embodiment includes the material conveying rail 121 and the water sprayer 122, and the material feeding end of the material conveying rail 121 is communicated with the acid leaching material outlet, so that the acid-leached aggregate can automatically fall onto the material conveying rail 121, and the water sprayer 122 above the material conveying rail 121 can wash the aggregate to wash away the acidic solution on the surface of the aggregate, and make the pores inside the aggregate fully absorb water, thereby avoiding the problem that the aggregate affects the concrete quality due to the large water absorption of the recycled aggregate in the concrete preparation process, and improving the quality of the prepared concrete.
Referring to fig. 2, the material conveying rail 121 is provided with a water leakage net 123 at a position corresponding to the water sprayer 122, and a sewage collecting tank 124 is provided below the water leakage net 123.
As an implementation manner of this application, this embodiment sets up the net 123 that leaks at the sprinkler 122 of biography material track 121 corresponds the position, it is provided with sewage collecting box 124 to leak net 123 below, sewage collecting box 124 is linked together with relevant drainage pipe, on the one hand, the sewage that produces in the washing process can in time be collected to net 123 and sewage collecting box 124 that leaks, avoid washing the process and cause harmful effects to the production environment, on the other hand, the silt on its surface of aggregate after the acid dip can become flexible more easily, consequently, through the washing back of sprinkler 122, the silt on its surface can be through leaking the net 123 and separating with the aggregate under the drive of rivers, and then can avoid silt to enter into the concrete, and then improved the quality of preparation regeneration aggregate, the concrete quality of accomplishing has been guaranteed to prepare.
Referring to fig. 5-6, the concrete mixer 2 is provided with two feeding ports, and the two feeding ports are respectively communicated with the discharging ports of the first mixing device and the second mixing device.
As an embodiment of this application, this embodiment is provided with two pan feeding mouths at concrete mixer 2, and is linked together two pan feeding mouths with first mixing arrangement and second mixing arrangement's discharge gate respectively, and then the aggregate in the first mixing arrangement and the mixture of powder enter into concrete mixer 2 through one of them pan feeding mouth, other concrete raw material mixtures such as cement enter into concrete mixer 2 from another pan feeding mouth, through this kind of setting, can guarantee that the aggregate surface is wrapped up by the powder, and then can improve the quality of concrete.
And the crushing and screening machine circularly crushes the aggregates according to the proportioning requirement of the particle sizes of the aggregates.
As an implementation mode of the application, because the concrete with different purposes has different requirements on the particle size of the aggregate and the proportion of the aggregate with different particle sizes, the application can adopt a circulating crushing mode according to actual requirements to enable the particle size of the aggregate output by the crushing and screening machine to be closer to the actual requirements, and the application range of the concrete preparation production line is widened.
The working principle of the invention is as follows: according to the concrete preparation production line, the aggregate obtained by recovering the construction waste is directly applied to the preparation process of the concrete through the aggregate recovery system and the concrete preparation system, and the construction waste left after the old building is dismantled can be effectively utilized, wherein the aggregate recovery system removes the metal waste of the construction waste through the magnetic separator, removes light substances in the construction waste through the sorting machine respectively, then crushes and screens the construction waste to the set size, and further can finish the primary treatment of the aggregate; the primarily treated aggregate is subjected to acid leaching and washing in sequence, so that the porosity and water absorption of the aggregate can be reduced, the surface smoothness of the recycled aggregate is improved, and then the acid-leached aggregate is washed, so that the acid solution remained on the aggregate can be washed away, the problem that acidic substances enter the concrete to influence the performance of the concrete is avoided, and the washed aggregate absorbs water, therefore, the washed aggregate is directly applied to a concrete preparation system, and the adverse effect of the water absorption of the aggregate on the concrete can be avoided; according to the invention, different raw materials are respectively mixed through the first mixing device and the second mixing device, and then the preliminarily mixed raw materials are stirred through the concrete stirrer to prepare concrete, the washed aggregate is firstly mixed with part of water and powder by the first mixing device, the water immersed in the aggregate can improve the bonding capacity with the powder, so that the aggregate and the powder can be stably connected, and the quality of prepared concrete is improved; the second stirring device preliminarily mixes the residual water with the cement, the water reducing agent and the residual concrete components, and then stirs the mixture with the aggregate and the powder mixture, so that the influence of the water absorption of the aggregate on the action effect of the cement and the water reducing agent can be reduced; after the acid leaching component 11 finishes the acid leaching process, the aggregate can automatically slide out downwards from the acid leaching outlet under the action of the gravity of the aggregate, so that the aggregate automatically enters a washing flow, and the convenience and the automation of aggregate treatment are improved; the water leakage net 123 and the sewage collecting box 124 are arranged at the position, corresponding to the water sprayer 122, of the material conveying rail 121, on one hand, the water leakage net 123 and the sewage collecting box 124 can timely collect sewage generated in the washing process, so that adverse effects on the production environment in the washing process are avoided, on the other hand, silt on the surface of the acid-dipped aggregate is easy to loosen, and therefore after the washing of the water sprayer 122, the silt on the surface of the acid-dipped aggregate is separated from the aggregate through the water leakage net 123 under the driving of water flow, so that the silt can be prevented from entering the concrete, the quality of the prepared recycled aggregate is improved, and the quality of the prepared concrete is guaranteed; according to the invention, the aggregate grain size output by the crushing and screening machine is closer to the actual demand by adopting a circulating crushing mode according to the actual demand, so that the application range of the concrete preparation production line is widened.
While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention and should not be taken as limiting the scope of the invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.
Claims (9)
1. A concrete preparation production line based on construction waste recycling is characterized by comprising an aggregate recycling system and a concrete preparation system;
the aggregate recovery system comprises:
the magnetic separator is used for removing metal impurities in the construction waste;
the sorting machine is used for removing light substances in the construction waste;
the crushing and screening machine is used for crushing and screening the construction waste after impurity removal to a specified size;
and the aggregate cleaning machine (1) is used for pickling and washing the screened aggregates.
2. The concrete preparation production line based on building waste recycling according to claim 1, wherein the concrete preparation system comprises:
the first mixing device is used for preliminarily mixing the washed aggregate, water and powder;
the second mixing device is used for preliminarily mixing water, cement, a water reducing agent and the remaining concrete components;
and the concrete mixer (2) is respectively communicated with the first mixing device and the second mixing device and is used for mixing the mixture output by the first mixing device and the mixture output by the second mixing device to obtain concrete.
3. The concrete preparation line based on the recycling of construction waste according to claim 1, characterized in that the aggregate washer (1) comprises an acid leaching assembly (11) and a showering assembly (12);
the pickling assembly (11) is used for immersing the aggregate into the acid liquor and fishing out the aggregate from the acid liquor;
the leaching assembly (12) is used for washing the acid-leached aggregates.
4. The concrete production line based on construction waste recycling according to claim 3, characterized in that the acid leaching assembly (11) comprises a tank body (111) and a leaking net cage (112);
the net leaking box (112) is driven by a driving force to slide into and away from the pool body (111) relative to the pool body (111);
the acid leaching device is characterized in that the net leaking box (112) is obliquely arranged, an acid leaching material outlet is formed in the bottom of one side of the net leaking box (112), and when the net leaking box (112) slides to the uppermost side, the acid leaching material outlet is opened.
5. The concrete production line based on the recycling of construction waste according to claim 4, characterized in that the acid leaching outlet is provided with a rotary baffle (113);
the bottom of the rotary baffle (113) is rotatably connected with the net leakage box (112);
a limiting block (114) is arranged in the tank body (111);
when the net leaking box (112) enters the tank body (111), the limiting block (114) limits the rotation of the rotating baffle (113);
when the net leaking box (112) completely leaves the tank body (111), the limit block (114) releases the limit of the rotating baffle (113).
6. The concrete preparation line based on the recycling of construction waste according to claim 5, characterized in that the shower assembly (12) comprises a material conveying rail (121) and a water sprayer (122) arranged above the material conveying rail (121);
the feeding end of the material conveying rail (121) is communicated with the acid leaching outlet.
7. The concrete preparation production line based on building waste recycling is characterized in that the material conveying rail (121) is provided with a water leakage net (123) at the corresponding position of the water sprayer (122), and a sewage collection box (124) is arranged below the water leakage net (123).
8. The concrete preparation production line based on building waste recycling of claim 2, wherein the concrete mixer (2) is provided with two feeding ports, and the two feeding ports are respectively communicated with the discharging ports of the first mixing device and the second mixing device.
9. The concrete preparation production line based on building rubbish recycling of claim 1, wherein the smashing and screening machine circularly smashes the aggregates according to the proportioning requirements of aggregate particle size.
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