CN113135674B - Utilize integrated device of abandonment ready-mixed concrete preparation regeneration cement thick liquid powder - Google Patents

Utilize integrated device of abandonment ready-mixed concrete preparation regeneration cement thick liquid powder Download PDF

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Publication number
CN113135674B
CN113135674B CN202110489718.1A CN202110489718A CN113135674B CN 113135674 B CN113135674 B CN 113135674B CN 202110489718 A CN202110489718 A CN 202110489718A CN 113135674 B CN113135674 B CN 113135674B
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outlet
inlet
ball milling
drying
pipeline
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CN113135674A (en
Inventor
高越青
梁超锋
陆俊
李静
王建苗
董金虎
张彧铭
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Zhejiang Yongjian New Material Technology Co ltd
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Zhejiang Yongjian New Material Technology Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/24—Cements from oil shales, residues or waste other than slag
    • C04B7/246—Cements from oil shales, residues or waste other than slag from waste building materials, e.g. waste asbestos-cement products, demolition waste
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C1/00—Crushing or disintegrating by reciprocating members
    • B02C1/02—Jaw crushers or pulverisers
    • B02C1/04—Jaw crushers or pulverisers with single-acting jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
    • B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
    • 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
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/18—Drum screens
    • B07B1/22—Revolving drums
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/38—Preparing or treating the raw materials individually or as batches, e.g. mixing with fuel
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/36—Manufacture of hydraulic cements in general
    • C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

An integrated device for preparing regenerated cement slurry powder by utilizing waste premixed concrete is characterized in that an inlet of a separation device is connected with a first feed inlet for placing the waste premixed concrete, an outlet of a conveying pipeline of the separation device is connected with an inlet of a filter pressing device, a lower outlet of the filter pressing device is positioned above a second feed inlet at the uppermost part of an air drying and drying device, a second discharge outlet of the air drying and drying device is connected with an inlet of a first conveying device, an outlet of the first conveying device is connected with an inlet of a crushing device, an outlet of the crushing device is connected with a third feed inlet of a ball milling device, a third discharge outlet of the ball milling device is connected with an inlet of a screening device, a coarse material outlet and a fine material outlet are arranged, the coarse material outlet is connected with the third feed inlet of the ball milling device through the second conveying device, the fine material outlet is connected with a fourth feed inlet of a calcining device through the third conveying device, and an outlet of the calcining device is connected with a collecting box. The invention realizes the integration and the industrialized production of the regenerated cement slurry powder.

Description

Utilize integrated device of abandonment ready-mixed concrete preparation regeneration cement thick liquid powder
Technical Field
The invention belongs to the field of building materials, and relates to a device for preparing regenerated cement slurry powder by utilizing waste premixed concrete.
Background
At present, 28 hundred million cubic meters of concrete is produced worldwide each year, and only China accounts for half of the yield; meanwhile, the amount of waste concrete is increased day by day due to town construction, infrastructure construction and the like, and the discharge amount of waste concrete in China only reaches 6.38 hundred million tons in 2020. Waste hardened cement or mortar, which is about 30% of waste concrete, is considered a low-value and difficult-to-use component, and is commonly used for landfill disposal.
The mud cake formed by separating and press-filtering the waste ready-mixed concrete in a commercial concrete mixing plant or a mixer truck has high water content and low activity, and is difficult to be directly used as a cementing material. At present, the recycling of the components of waste ready mixed concrete, especially the recycling of cement paste components, lacks an integrated industrialized treatment preparation device.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an integrated device for preparing the regenerated cement paste by utilizing waste premixed concrete, and realizes the integration and industrial production of the regenerated cement paste.
The technical scheme adopted for solving the technical problems is as follows:
an integrated device for preparing regenerated cement slurry powder by utilizing waste premixed concrete comprises a separation device, a filter pressing device, an air drying and drying device, a first conveying device, a crushing device, a ball milling device, a screening device, a second conveying device, a third conveying device and a calcining device;
the separating device comprises a sand-stone separator, an inlet of the sand-stone separator is connected with a first feeding hole for placing waste ready-mixed concrete, the sand-stone separator is provided with a stone outlet, a sand outlet and a discharging hole, the discharging hole is communicated with an inlet of a sedimentation tank, an outlet of the sedimentation tank is connected with a first pipeline, and a first conveying pump is arranged on the first pipeline;
the outlet of the first pipeline is connected with the inlet of the filter pressing device, the outlet below the filter pressing device is positioned above the uppermost second feed inlet of the air drying and drying device, the second discharge outlet of the air drying and drying device is connected with the inlet of the first conveying device, the outlet of the first conveying device is connected with the inlet of the crushing device, the outlet of the crushing device is connected with the third feed inlet of the ball milling device, the third discharge outlet of the ball milling device is connected with the inlet of the screening device, the screening device is provided with a coarse material outlet and a fine material outlet, the coarse material outlet is connected with the third feed inlet of the ball milling device through the second conveying device, the fine material outlet is connected with the fourth feed inlet of the calcining device through the third conveying device, and the outlet of the calcining device is connected with the collecting box.
Further, in the separator, first pan feeding mouth is installed on the separation support, first pan feeding mouth passes through the inlet connection of second pipeline and grit separating centrifuge, the discharge gate of grit separating centrifuge passes through the entry intercommunication of third pipeline and sedimentation tank.
The filter pressing device comprises a support, a pressing plate, a filter plate, a thrust plate and a cross beam, wherein the cross beam is supported above the support, the filter plate, the pressing plate and the thrust plate are arranged on the cross beam, the thrust plate is fixed at one end of the cross beam, and the filter plate is positioned between the pressing plate and the thrust plate.
In the air drying device, an air drying bin is arranged below the second feeding hole, a fan is arranged in the air drying bin, and a controllable first discharging hole is arranged at the bottom of the air drying bin; the drying bin is arranged below the air drying bin, a drying opening is arranged in the drying bin, and a second discharging opening is arranged at the bottom of the drying bin.
The first conveyor comprises a first conveyor belt and a conveyor support, and the first conveyor belt is mounted on the conveyor support.
The crushing device is a jaw crusher and is provided with a movable jaw plate, a fixed jaw plate and a belt pulley, wherein the fixed jaw plate is fixed on the left side, the movable jaw plate is positioned on the right side of the fixed jaw plate, and the movable jaw plate is connected with the belt pulley on the same side.
In the ball milling device, a first spiral fan blade is arranged below a third feeding hole, the middle part of the ball milling device is a barrel body, the ball milling device is supported by a ball milling support, and the right side of the barrel body is a third discharging hole.
The screening device is a cyclone screen, the cyclone screen is provided with a second spiral fan blade and a screen, an inlet of the screening device is connected with an inlet of the second spiral fan blade, an outlet of the second spiral fan blade is communicated with an inner cavity of the screen, two outlets are arranged below the screening device, one outlet is a fine material outlet, and the other outlet is a coarse material outlet.
The second conveying device comprises a fourth pipeline, a first supporting frame and a second conveying pump, the fourth pipeline is arranged on the first supporting frame and is provided with an inlet and an outlet, and the second conveying pump is arranged in the fourth pipeline.
The third conveying device comprises a fifth pipeline, a second supporting frame and a third conveying pump, wherein the fifth pipeline is arranged on the second supporting frame and is provided with an inlet and an outlet, and the third conveying pump is arranged in the fifth pipeline.
The fourth feed inlet is positioned above the calcining device, a heating bin is arranged below the fourth feed inlet, a discharge hole is arranged at the bottom of the heating bin, a cooling bin is arranged below the heating bin, a third spiral fan blade is arranged in the cooling bin, and an outlet on the right side of the cooling bin is connected with a receiving box.
The air-drying and drying device is provided with a temperature, time and weight measurement and control device, the ball milling device is provided with a ball milling time controller, the calcining device is provided with a temperature and time measurement and control device, the first feeding port, the second feeding port, the third feeding port and the fourth feeding port are all provided with switches, the temperature, time and weight measurement and control device of the air-drying and drying device is provided with a ball milling time controller of the ball milling device, and the temperature and time measurement and control device of the calcining device and the switches are all connected with a control computer.
The technical conception of the invention is as follows: the device has the characteristics of front end pretreatment of regenerated cement slurry, pretreatment of regenerated cement slurry powder, optimization of the regenerated cement slurry powder and the like.
The front-end pretreatment of the regenerated cement slurry is as follows: before the recycled cement slurry is used for preparing the recycled cement slurry powder, aggregates such as sand and stone in waste premixed concrete can be removed on the one hand through sand and stone separation, slurry precipitation and slurry press filtration, and meanwhile, more substances with potential activities such as cement and fly ash are reserved in the recycled cement slurry, so that the quality of the recycled cement slurry powder prepared from the recycled cement slurry is improved.
The pretreatment of the regenerated cement slurry powder is as follows: the regenerated cement slurry with higher water content after filter pressing is subjected to air drying, drying and other treatments so as to meet the grinding requirement of the regenerated cement slurry powder and realize the efficient optimization of the particle size of the regenerated micro powder.
The regenerated cement slurry optimization means: proper grinding time is selected after proper crushing, and the problems of the fineness requirement of the regenerated cement slurry powder and the grinding energy consumption are considered; meanwhile, according to the fineness requirement of the regenerated cement slurry powder, a screen with corresponding screen mesh size is arranged, and the particle size of the regenerated cement slurry powder is optimized efficiently through vibration screening and negative pressure adsorption; finally, the cement slurry powder enters a high-temperature calcination device, proper temperature is set, and the energy consumption problem is considered at the same time, so that the high-temperature activity optimization of the regenerated cement slurry powder is further realized.
The invention adds a treatment system for preparing regenerated cement slurry powder from waste cement slurry on the basis of a device for separating aggregate from waste fresh concrete and a filter pressing device for waste cement slurry, and mainly comprises an air drying and drying device, a crushing device, a ball milling device and a calcining device, and performs accurate automatic control on each treatment procedure, thereby realizing the integrated industrialized preparation from waste ready-mixed concrete to regenerated cement slurry powder which can be directly used as auxiliary cementing material.
The device can realize the whole process of computer control, automatic production and integration and industrial automation of the preparation of the regenerated cement slurry from the separation of the regenerated cement slurry, the pretreatment of the regenerated cement slurry powder, the particle size optimization and the further activity optimization.
The beneficial effects of the invention are mainly shown in the following steps: realizing the integration and the industrialized production of the regenerated cement slurry powder; the recycled micro powder is prepared by utilizing the waste ready-mixed concrete and is used as an auxiliary cementing material to replace cement and fly ash, so that the problem of increasingly shortage of limestone resources can be reduced, and the carbon emission is reduced; the fineness of the regenerated micro powder is increased by mechanical grinding, so as to achieve physical activation; the harmful impurities are removed by high-temperature calcination, and calcium silicate hydrate and calcium carbonate are thermally decomposed to form calcium oxide and amorphous silicon dioxide, so that chemical activation is achieved. Therefore, the method for preparing the regenerated cement paste by using the waste ready-mixed concrete has good economic, social and environmental benefits, and is one of important ways for realizing sustainable development of the auxiliary cementing material.
Drawings
FIG. 1 is a schematic diagram of an integrated apparatus for preparing recycled cementitious slurry from waste ready mixed concrete.
Fig. 2 is a schematic view of a separation device.
FIG. 3 is a schematic diagram of a filter press apparatus.
Fig. 4 is a schematic view of an air drying device.
Fig. 5 is a schematic view of a first conveyor.
Fig. 6 is a schematic view of a crushing device.
Fig. 7 is a schematic view of a ball milling apparatus.
Fig. 8 is a schematic view of a screening apparatus.
Fig. 9 is a schematic view of a second conveyor.
Fig. 10 is a schematic view of a third conveyor.
FIG. 11 is a schematic view of a calcination apparatus.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Referring to fig. 1 to 11, an integrated apparatus for preparing recycled cement slurry powder from waste ready mixed concrete includes a separating apparatus 1, a filter pressing apparatus 2, an air drying apparatus 3, a first conveying apparatus 4, a crushing apparatus 5, a ball milling apparatus 6, a sieving apparatus 7, a second conveying apparatus 8, a third conveying apparatus 9, and a calcining apparatus 10, which are sequentially connected.
As shown in fig. 2, the separation device 1 is composed of a first feed inlet 101, a sand-stone separator 104 and a sedimentation tank 108, which are connected through a second pipeline 103 and a third pipeline 107. A separation base 102 is arranged below the first feed inlet 101; the front part of the sand-stone separation system 104 is provided with a stone outlet 105 and a sand outlet 106; one side of the sedimentation tank is connected with a first pipeline 109, and a first delivery pump 110 is connected to the first pipeline 109.
As shown in fig. 3, the filter pressing device 2 is disposed above a filter pressing base 205, a support 204, a compacting plate 201, a filter plate 202, a thrust plate 203 and a cross beam 206 are disposed in the filter pressing device, the cross beam 206 is supported above the support 204, the filter plate 202, the compacting plate 201 and the thrust plate 203 are disposed on the cross beam 206, the thrust plate 203 is fixed on one side of the cross beam 206, and the filter plate 202 is located between the compacting plate 201 and the thrust plate 203.
As shown in fig. 4, the air drying device 3 has a second feeding port 301 at the uppermost part, an air drying bin 302 below the second feeding port 301, a fan 303 is arranged in the air drying bin 302, and a controllable first discharging port 304 is arranged at the bottom of the air drying bin 302; below the air drying bin 302 is a drying bin 305, a drying opening 306 is arranged in the drying bin 305, and a second discharging opening 307 is arranged at the bottom of the drying bin 305.
As shown in fig. 5, the first conveyor 4 is composed of a first conveyor belt 401 and a conveyor bracket 402, the first conveyor belt 401 being mounted on the conveyor bracket 402.
As shown in fig. 6, the crushing device 5 is a jaw crusher, and is provided with a movable jaw 501, a fixed jaw 502 and a belt pulley 503, wherein the fixed jaw 502 is fixed on the left side, the movable jaw 501 is positioned on the right side of the fixed jaw 502, and the movable jaw 501 is connected with the belt pulley 503 on the same side.
As shown in fig. 7, the ball milling device 6 is provided with a third feeding hole 601, a first spiral fan blade 602 is arranged below the third feeding hole, a barrel body 603 is arranged in the middle of the third feeding hole, the ball milling device 6 is supported by a support 604, and a third discharging hole 605 is arranged on the right side of the barrel body.
As shown in fig. 8, the screening device 7 is a cyclone screen, wherein a second spiral blade 701 and a screen 702 are provided, and two outlets are provided below the screening device 7, one being a fine material outlet 703 and the other being a coarse material outlet 704.
As shown in fig. 9, the second conveying device 8 is composed of a fourth pipeline 801, a first supporting frame 802 and a second conveying pump 803, wherein the fourth pipeline 801 is installed on the first supporting frame 802, the fourth pipeline 801 is provided with an inlet and an outlet, and the fourth pipeline 801 is internally provided with the second conveying pump 803.
As shown in fig. 10, the third conveying device 9 is composed of a fifth pipeline 901, a second supporting frame 902 and a third conveying pump 903, wherein the fifth pipeline 901 is installed on the second supporting frame 902, the fifth pipeline 901 is provided with an inlet and an outlet, and the third conveying pump 903 is arranged in the fifth pipeline 901.
As shown in fig. 11, a calcining device 10 is shown, a fourth feeding port 1001 is arranged above the calcining device 10, a heating bin 1002 is arranged below the fourth feeding port 1001, a discharging port 1003 is arranged at the bottom of the heating bin, a cooling bin 1004 is arranged below the heating bin, a third spiral fan blade 1005 is arranged in the cooling bin 1004, and a collecting box 1006 is connected to an outlet on the right side of the cooling bin 1004.
The air-drying and drying device is provided with a temperature, time and weight measurement and control device, the ball milling device is provided with a ball milling time controller, the calcining device is provided with a temperature and time measurement and control device, the first feeding port, the second feeding port, the third feeding port and the fourth feeding port are all provided with switches, the temperature, time and weight measurement and control device of the air-drying and drying device is provided with a ball milling time controller of the ball milling device, and the temperature and time measurement and control device of the calcining device and the switches are all connected with a control computer.
The demands of the systems of the device and the switch connected with the inlet can be controlled by a computer.
The application method of the embodiment is as follows: the waste ready mixed concrete enters from the first feeding hole 101, enters the separating device 104 through the second pipeline 103, separates stones, sand and cement slurry through the separating device 104, the stones are discharged through the stone outlet 105, the sand is discharged through the sand outlet 106, the cement slurry is discharged into the sedimentation tank 108 through the third pipeline 107, and the cement slurry is further pumped into the filter pressing device 2 through the first pipeline 109 by the first conveying pump 110. The filter pressing device 2 filters cement paste into mud cakes, then the mud cakes fall into an air drying bin 302 through a second feeding hole 301, a fan 303 is started to air-dry the mud cakes, after the mud cakes are air-dried for 1 to 4 hours, a first discharging hole 304 is opened to enter a drying bin 305, and the temperature inside the drying bin 305 is heated to 100 to 150 ℃. After the mud cake is absolute dry, the second discharging hole 307 is opened, the mud cake falls to the conveyor belt 401, the dried mud cake is transported to the inlet of the crushing device 5 through the first conveyor 4, the crushing device 5 is started to crush the dried mud cake to particles with the particle size smaller than 10mm, the dried mud cake falls to the third feeding hole 601 of the ball milling device 6, the first screw fan blade 602 is started to convey the crushed dried cement slurry particles to the inner barrel 603 for grinding, and the grinding particle size can be set according to requirements. After finishing grinding, the regenerated cement paste powder enters the screen 702 through the second spiral fan blade 701 and is conveyed to the screening device 7 through the third discharge hole 605, after screening, the screen residues fall into the fourth pipeline 801 of the second conveying device 8 through the coarse material outlet 704, and the second conveying pump 803 is started to convey the screen residues to the third feed hole 601 of the ball milling device 6. The regenerated cement slurry powder meeting the requirements enters the fifth pipeline 901 of the third conveying device 9 through the fine material outlet 703, the third conveying pump 903 is started to convey the regenerated cement slurry powder to the calcining device 10, the regenerated cement slurry powder completely enters the heating bin 1002, the fourth material inlet 1001 is closed, the temperature in the heating bin is heated to 450-900 ℃, and the calcining time is controlled to be 1-3 h. After the regenerated cement slurry powder is calcined, a fourth discharging hole 1003 is opened to enter a cooling chamber 1004, the temperature of the cooling chamber 1004 is normal, and after the regenerated cement slurry powder is cooled for 1 to 2 hours, the regenerated cement slurry powder is conveyed to a collecting box 1006 through a third spiral fan blade 1005.
The scheme of the embodiment realizes the integrated industrial preparation from the waste ready mixed concrete to the activated regenerated cement paste powder, and has high degree of automation.
The air drying device 3 is provided with temperature, time and weight measuring and controlling devices, so that the optimal control of the drying environment of the regenerated cement slurry is realized. The heating temperature is in the range of room temperature to 300 ℃, and the optimal control temperature is 100-150 ℃, so that the drying efficiency is improved, and the production period of the regenerated cement slurry powder is shortened; the drying time is not less than 2 hours, and the weight change in the last 1 hour of the drying of the regenerated cement slurry is controlled to be not more than 5 percent, so that the regenerated cement slurry is ensured to be sufficiently dried, and a good ball milling effect is obtained.
The ball milling device 6 is provided with a ball milling time controller, and the ball milling time is optimized, so that the regenerated powder can be ball milled to the regenerated powder with optimized particle size.
The screening device 7 is provided with a cyclone screen, has the function of screening coarse and fine materials, and can screen fine materials meeting the fineness requirement; the coarse material powder after sieving can be recycled to a ball milling system and ground again, so that the full grinding utilization of the regenerated cement slurry is realized.
The calcining device 10 is provided with a temperature and time measuring and controlling device to realize the optimal control of the high-temperature activation of the regenerated cement slurry powder. The calcination temperature is controlled to be 450-900 ℃ and the calcination time is controlled to be 1-3h, so that the requirements of energy consumption and calcination activation efficiency are met, and the regenerated cement slurry powder is uniformly, quickly and efficiently activated.
The scheme of the embodiment realizes the full recycling utilization of solid wastes of waste premixed concrete slurry type buildings, and the prepared high-activity regenerated cement slurry powder has good auxiliary gelation properties and can partially replace traditional cementing materials such as cement, thereby reducing the increasing shortage degree of limestone resources and high CO caused by cement production on one hand 2 Greenhouse gas effect caused by emission; meanwhile, the problem of environmental pollution caused by difficult disposal and random discharge of solid waste of the building is solved; and the activated and regenerated cement slurry powder has the characteristics of high quality and high added value, and has good economic value. Therefore, the integrated industrialized preparation device for preparing the regenerated cement paste powder by utilizing the waste ready-mixed concrete is developed, has good economic, social and environmental benefits, and is an important way for sustainable development of the auxiliary cementing material.
The embodiments described in this specification are merely illustrative of the manner in which the inventive concepts may be implemented. The scope of the present invention should not be construed as being limited to the specific forms set forth in the embodiments, but the scope of the present invention and the equivalents thereof as would occur to one skilled in the art based on the inventive concept.

Claims (10)

1. An integrated device for preparing regenerated cement slurry powder by utilizing waste premixed concrete is characterized by comprising a separation device, a filter pressing device, an air drying and drying device, a first conveying device, a crushing device, a ball milling device, a screening device, a second conveying device, a third conveying device and a calcining device;
the separating device comprises a sand-stone separator, an inlet of the sand-stone separator is connected with a first feeding hole for placing waste ready-mixed concrete, the sand-stone separator is provided with a stone outlet, a sand outlet and a discharging hole, the discharging hole is communicated with an inlet of a sedimentation tank, an outlet of the sedimentation tank is connected with a first pipeline, and a first conveying pump is arranged on the first pipeline;
the outlet of the first pipeline is connected with the inlet of the filter pressing device, the outlet below the filter pressing device is positioned above the uppermost second feed inlet of the air drying and drying device, the second discharge outlet of the air drying and drying device is connected with the inlet of the first conveying device, the outlet of the first conveying device is connected with the inlet of the crushing device, the outlet of the crushing device is connected with the third feed inlet of the ball milling device, the third discharge outlet of the ball milling device is connected with the inlet of the screening device, the screening device is provided with a coarse material outlet and a fine material outlet, the coarse material outlet is connected with the third feed inlet of the ball milling device through the second conveying device, the fine material outlet is connected with the fourth feed inlet of the calcining device through the third conveying device, and the outlet of the calcining device is connected with the collecting box.
2. The integrated device for preparing regenerated cement slurry powder by utilizing waste premixed concrete according to claim 1, wherein in the separation device, a first feeding port is arranged on a separation support, the first feeding port is connected with an inlet of a sand-stone separator through a second pipeline, and a discharging port of the sand-stone separator is communicated with an inlet of a sedimentation tank through a third pipeline.
3. An integrated device for preparing recycled cement paste by using waste ready mixed concrete according to claim 1 or 2, wherein the filter pressing device comprises a support, a compacting plate, a filter plate, a thrust plate and a cross beam, wherein the cross beam is supported above the support, the cross beam is provided with the filter plate, the compacting plate and the thrust plate, the thrust plate is fixed at one end of the cross beam, and the filter plate is positioned between the compacting plate and the thrust plate.
4. The integrated device for preparing regenerated cement slurry powder by utilizing waste ready-mixed concrete according to claim 1 or 2, wherein an air drying bin is arranged below the second feeding hole in the air drying and drying device, a fan is arranged in the air drying bin, and a controllable first discharging hole is arranged at the bottom of the air drying and drying bin; the drying bin is arranged below the air drying bin, a drying opening is arranged in the drying bin, and a second discharging opening is arranged at the bottom of the drying bin.
5. An integrated device for preparing recycled cement paste by using waste ready mixed concrete according to claim 1 or 2, wherein the crushing device is a jaw crusher, and is provided with a movable jaw plate, a fixed jaw plate and a belt pulley, wherein the fixed jaw plate is fixed on the left side, the movable jaw plate is positioned on the right side of the fixed jaw plate, and the movable jaw plate is connected with the belt pulley on the same side.
6. The integrated device for preparing regenerated cement slurry powder by utilizing waste premixed concrete according to claim 1 or 2, wherein in the ball milling device, a first spiral fan blade is arranged below a third feeding hole, a barrel body is arranged in the middle of the ball milling device, the ball milling device is supported by a ball milling support, and a third discharging hole is arranged on the right side of the barrel body.
7. An integrated device for preparing regenerated cement paste by using waste premixed concrete as claimed in claim 1 or 2, wherein the screening device is a cyclone screen, the cyclone screen is provided with a second spiral blade and a screen, an inlet of the screening device is connected with an inlet of the second spiral blade, an outlet of the second spiral blade is communicated with an inner cavity of the screen, two outlets are arranged below the screening device, one is a fine material outlet, and the other is a coarse material outlet.
8. An integrated apparatus for preparing recycled cementitious slurry from waste ready mixed concrete as claimed in claim 1 or 2, wherein said first conveyor comprises a first conveyor belt and a conveyor support, said first conveyor belt being mounted on said conveyor support;
the second conveying device comprises a fourth pipeline, a first supporting frame and a second conveying pump, the fourth pipeline is arranged on the first supporting frame, the fourth pipeline is provided with an inlet and an outlet, and the second conveying pump is arranged in the fourth pipeline;
the third conveying device comprises a fifth pipeline, a second supporting frame and a third conveying pump, wherein the fifth pipeline is arranged on the second supporting frame and is provided with an inlet and an outlet, and the third conveying pump is arranged in the fifth pipeline.
9. The integrated device for preparing regenerated cement slurry by utilizing waste premixed concrete according to claim 1 or 2, wherein the fourth feeding port is positioned above the calcining device, a heating bin is arranged below the fourth feeding port, a discharging port is arranged at the bottom of the heating bin, a cooling bin is arranged below the heating bin, a third spiral fan blade is arranged in the cooling bin, and an outlet on the right side of the cooling bin is connected with a receiving box.
10. An integrated device for preparing regenerated cement slurry powder by using waste ready mixed concrete according to claim 1 or 2, wherein the air drying and drying device is provided with a temperature, time and weight measuring and controlling device, the ball milling device is provided with a ball milling time controller, the calcining device is provided with a temperature and time measuring and controlling device, the first feeding hole, the second feeding hole, the third feeding hole and the fourth feeding hole are all provided with switches, the temperature, time and weight measuring and controlling device of the air drying and drying device, the ball milling time controller of the ball milling device, the temperature and time measuring and controlling device of the calcining device and the switches are all connected with a control computer.
CN202110489718.1A 2021-05-06 2021-05-06 Utilize integrated device of abandonment ready-mixed concrete preparation regeneration cement thick liquid powder Active CN113135674B (en)

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CN113754324A (en) * 2021-09-27 2021-12-07 清华大学 Preparation method and application of regenerated cement based on high temperature and carbonization coupling

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