CN113135674A - Utilize integrated device of abandonment premixed concrete preparation regeneration cement paste powder - Google Patents

Utilize integrated device of abandonment premixed concrete preparation regeneration cement paste powder Download PDF

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Publication number
CN113135674A
CN113135674A CN202110489718.1A CN202110489718A CN113135674A CN 113135674 A CN113135674 A CN 113135674A CN 202110489718 A CN202110489718 A CN 202110489718A CN 113135674 A CN113135674 A CN 113135674A
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drying
inlet
outlet
cement paste
ball milling
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CN202110489718.1A
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CN113135674B (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 recycled cement paste powder by utilizing waste premixed concrete, wherein an inlet of a separating device is connected with a first feeding port for putting the waste premixed concrete, an outlet of a conveying pipeline of the separating device is connected with an inlet of a filter pressing device, a lower outlet of the filter pressing device is positioned above a second feeding port at the top of an air drying and drying device, a second discharging port 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 feeding port of a ball milling device, a third discharging port of the ball milling device is connected with an inlet of a screening device, the screening device is provided with a coarse material outlet and a fine material outlet, the coarse material outlet is connected with a third feeding port of the ball milling device through the second conveying device, the fine material outlet is connected with a fourth feeding port of a calcining device through the third conveying device, the outlet of the calcining device is connected with the collecting box. The invention realizes the integrated and industrialized production of the regenerated cement paste powder.

Description

Utilize integrated device of abandonment premixed concrete preparation regeneration cement paste powder
Technical Field
The invention belongs to the field of building materials, and relates to a device for preparing regenerated cement paste powder by using waste ready-mixed concrete.
Background
At present, 28 billion cubic meters of concrete are produced worldwide every year, and only China has half the yield; meanwhile, the amount of waste concrete is increasing day by day due to township construction, infrastructure construction and the like, and the discharge amount of the waste concrete in China only reaches 6.38 hundred million tons in 2020. Waste hardened cement or mortar accounts for about 30% of waste concrete, is considered to be a low-value and difficult-to-utilize component, and is commonly used for site landfill disposal.
The mud cake formed by separating and filter-pressing the waste premixed concrete in a commercial concrete mixing plant or a mixing truck has high water content and low activity, and is difficult to be directly used as a cementing material. At present, an integrated industrial treatment preparation device is lacked for recycling all components of waste ready-mixed concrete, especially recycling cement paste components.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an integrated device for preparing recycled cement paste powder by using waste ready-mixed concrete, and realizes the integration and industrial production of the recycled cement paste powder.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an integrated device for preparing recycled cement paste powder by using 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 separation device comprises a sand-stone separator, an inlet of the sand-stone separator is connected with a first feeding port for placing the waste premixed concrete, the sand-stone separator is provided with a stone outlet, a sand outlet and a discharge port, the discharge port is communicated with an inlet of the 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 export of first pipeline and filter pressing device's entry linkage, filter pressing device's below export is located air-dry the top of the second pan feeding mouth of drying device the top, air-dry drying device's second discharge gate and first conveyor's access connection, first conveyor's export with breaker's entry meets, breaker's export with ball milling device's third pan feeding mouth meets, ball milling device's third discharge gate with screening plant's entry meets, screening plant is equipped with coarse fodder export and fine material export, the coarse fodder export through second conveyor with ball milling device's third pan feeding mouth meets, the fine material export through third conveyor with calcining device's fourth pan feeding mouth meets, calcining device's export and collecting box are connected.
Furthermore, in the separation device, a first feeding port is arranged on the separation support, the first feeding port is connected with an inlet of the sand-stone separator through a second pipeline, and a discharge port of the sand-stone separator is communicated with an inlet of the sedimentation tank through a third pipeline.
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 located between the pressing plate and the thrust plate.
In the air drying and drying device, an air drying bin is arranged below the second feeding port, a fan is arranged in the air drying bin, and a controllable first discharging port is arranged at the bottom of the air drying bin; the drying bin is arranged below the air drying bin, a drying opening is formed in the drying bin, and a second discharge opening is formed in the bottom of the drying bin.
The first conveying device comprises a first conveying belt and a conveying support, and the first conveying belt is installed on the conveying support.
The crushing device is a jaw crusher and is provided with a movable jaw plate, a fixed jaw plate and a belt pulley, the fixed jaw plate is fixed on the left side, the movable jaw plate is located on the right side of the fixed jaw plate, and the movable jaw plate is connected with the belt pulley on the same side.
Among the ball-milling device, third pan feeding mouth below is first spiral flabellum, and the mid portion of ball-milling device is the ladle body, and the ball-milling device passes through ball-milling support to be supported, and the ladle body right side is the third discharge gate.
The screening plant is the cyclone sieve, the cyclone sieve is equipped with second spiral flabellum and screen cloth, screening plant's entry and the access connection of second spiral flabellum, the export and the screen cloth inner chamber intercommunication of second spiral flabellum are equipped with two exports in the screening plant below, and one is the export of thin material, and another is the export of coarse fodder.
The second conveying device comprises a fourth pipeline, a first support frame and a second conveying pump, the fourth pipeline is installed on the first support 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, the fifth pipeline is installed on the second supporting frame and is provided with an inlet and an outlet, and the fifth pipeline is internally provided with the third conveying pump.
The fourth feeding port is located above the calcining device, the heating bin is arranged below the fourth feeding port, the discharge port is arranged at the bottom of the heating bin, the cooling bin is arranged below the heating bin, the third spiral fan blades are arranged in the cooling bin, and the collecting box is connected to the outlet at the right side of the cooling bin.
The air-drying device is provided with a temperature measuring and controlling device, a time measuring and controlling device and a 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 measuring and controlling device and a time measuring and controlling 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 measuring and controlling device, the time measuring and controlling device and the weight measuring and controlling device of the air-drying device are connected with a control computer, and the ball-milling time controller of the ball-milling device, the temperature measuring and controlling device and the time measuring and controlling device of the calcining device are all connected with the control computer.
The technical conception of the invention is as follows: the device has the characteristics of the front-end pretreatment of the regenerated cement slurry, the pretreatment of the regenerated cement slurry powder, the optimization of the regenerated cement slurry powder and the like.
The front-end pretreatment of the regenerated cement slurry refers to: before the regenerated cement slurry is used for preparing the regenerated cement slurry powder, aggregate such as sand and stone in the waste premixed concrete can be removed through sand-stone separation, slurry sedimentation and slurry filter pressing, more substances with potential activity such as cement and fly ash are reserved in the regenerated cement slurry, and the quality of the regenerated cement slurry powder prepared from the regenerated cement slurry is improved.
The pretreatment of the regenerated cement paste powder comprises the following steps: the regenerated cement slurry with high water content after filter pressing is dried, dried and the like, so that the grinding requirement of the regenerated cement slurry powder is met, and efficient particle size optimization of the regenerated micro powder is realized.
The optimization of the regenerated cement paste powder comprises the following steps: after proper crushing, proper grinding time is selected, and the problems of the fineness requirement and the grinding energy consumption of the regenerated cement paste powder are considered; meanwhile, according to the fineness requirement of the regenerated cement paste powder, a screen with a corresponding screen mesh size is arranged, and efficient particle size optimization of the regenerated cement paste powder is realized through vibration screening and negative pressure adsorption; and finally, the regenerated cement paste powder enters a high-temperature calcining device, proper temperature is set, and meanwhile, the problem of energy consumption is considered, so that the high-temperature activity optimization of the regenerated cement paste powder is further realized.
The invention adds a treatment system for preparing regenerated cement slurry powder from waste and fresh concrete on the basis of a waste and fresh concrete aggregate separation device and a waste cement slurry filter-pressing device, wherein the treatment system mainly comprises an air-drying and drying device, a crushing device, a ball-milling device and a calcining device, and the treatment procedures in each step are accurately and automatically controlled, so that the integrated industrial preparation from waste and fresh concrete to the regenerated cement slurry powder which can be directly used as an auxiliary cementing material is realized.
The device can realize the whole process of computer control and automatic production 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, and realizes the integration and industrial automation of the preparation of the regenerated cement slurry powder.
The invention has the following beneficial effects: the integration and the industrial production of the regenerated cement paste powder are realized; the waste premixed concrete is used for preparing the regenerated micro-powder and is used as an auxiliary cementing material to replace cement and fly ash, so that the problem of increasing shortage of limestone resources can be reduced, and carbon emission is reduced; mechanical grinding is utilized to increase the fineness of the regenerated micro powder so as to achieve physical activation; high-temperature calcination is utilized to remove harmful impurities, 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 powder by using the waste premixed concrete has good economic, social and environmental benefits, and is one of important ways for realizing the sustainable development of the auxiliary cementing material.
Drawings
FIG. 1 is a schematic view of an integrated apparatus for preparing recycled cement paste powder using waste ready-mixed concrete.
Fig. 2 is a schematic view of a separation device.
FIG. 3 is a schematic view of a pressure filtration apparatus.
Fig. 4 is a schematic view of the air drying and drying apparatus.
Fig. 5 is a schematic view of a first transfer device.
Fig. 6 is a schematic view of a crushing device.
FIG. 7 is a schematic diagram of a ball milling apparatus.
Figure 8 is a schematic view of a screening device.
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 device for preparing recycled cement paste powder by using waste ready-mixed concrete comprises a separation device 1, a filter pressing device 2, an air drying and drying device 3, a first conveying device 4, a crushing device 5, a ball milling device 6, a screening device 7, a second conveying device 8, a third conveying device 9 and a calcining device 10 which are connected in sequence.
As shown in fig. 2, the separation device 1 comprises a first material inlet 101, a sand-stone separator 104, and a sedimentation tank 108, which are connected by a second pipe 103 and a third pipe 107. A separating base 102 is arranged below the first feeding port 101; the front part of the sand 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 the first pipeline 109 is connected with a first delivery pump 110.
As shown in fig. 3, the filter press device 2 is disposed above a filter press base 205, and is provided with a support 204, a pressing plate 201, a filter plate 202, a thrust plate 203 and a cross beam 206, the cross beam 206 is supported above the support 204, the cross beam 206 is provided with the filter plate 202, the pressing plate 201 and the thrust plate 203, the thrust plate 203 is fixed on one side of the cross beam 206, and the filter plate 202 is located between the pressing plate 201 and the thrust plate 203.
As shown in fig. 4, the top of the air drying and drying device 3 is provided with a second material inlet 301, an air drying bin 302 is arranged below the second material inlet 301, a fan 303 is arranged in the air drying bin 302, and a controllable first material outlet 304 is arranged at the bottom of the air drying bin; a drying bin 305 is arranged below the air drying bin 302, a drying port 306 is arranged in the drying bin 305, and a second discharging port 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 frame 402, and the first conveyor belt 401 is mounted on the conveyor frame 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 located 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 material inlet 601, a first spiral fan 602 is disposed below the third material inlet, a middle portion of the third spiral fan is a barrel 603, the ball milling device 6 is supported by a support 604, and a third material outlet 605 is disposed on the right side of the barrel.
As shown in fig. 8, the sieving device 7 is a cyclone sieve, in which a second spiral fan blade 701 and a sieve 702 are provided, and two outlets are provided below the sieving device 7, one is a fine outlet 703 and the other is a coarse outlet 704.
Fig. 9 shows a second conveying device 8, which 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, 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 apparatus 10 is provided, a fourth feeding port 1001 is provided above the calcining apparatus 10, a heating chamber 1002 is provided below the fourth feeding port 1001, a discharging port 1003 is provided at the bottom of the heating chamber, a cooling chamber 1004 is provided below the heating chamber, a third screw blade 1005 is provided in the cooling chamber 1004, and a collecting box 1006 is connected to the right outlet of the cooling chamber 1004.
The air-drying device is provided with a temperature measuring and controlling device, a time measuring and controlling device and a 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 measuring and controlling device and a time measuring and controlling 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 measuring and controlling device, the time measuring and controlling device and the weight measuring and controlling device of the air-drying device are connected with a control computer, and the ball-milling time controller of the ball-milling device, the temperature measuring and controlling device and the time measuring and controlling device of the calcining device are all connected with the control computer.
The requirements of each system of the device and the switch of the connecting inlet can be controlled by a computer.
The using method of the embodiment comprises the following steps: waste ready-mixed concrete enters from the first feeding port 101, enters the separating device 104 through the second pipeline 103, stones, sand and cement paste are separated through the separating device 104, stones are discharged through the stone outlet 105, sand is discharged through the sand outlet 106, cement paste is discharged into the sedimentation tank 108 through the third pipeline 107, and the cement paste 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 presses the cement slurry into mud cakes, the mud cakes fall to the air drying bin 302 through the second feeding port 301, the fan 303 is started to air the mud cakes, the first discharging port 304 is opened to enter the drying bin 305 after the mud cakes are air-dried for 1-4 hours, and the temperature inside the drying bin 305 is heated to 100-150 ℃. After the mud cake is completely dried, a second discharge hole 307 is opened, the mud cake falls to a conveyor belt 401, the dried mud cake is conveyed to an inlet of a crushing device 5 through a first conveying device 4, the crushing device 5 is opened to crush the dried mud cake to particles with the particle size smaller than 10mm, the dried mud cake falls to a third feeding hole 601 of a ball milling device 6, a first spiral fan blade 602 is opened to convey the crushed dried cement slurry particles to an inner barrel body 603 for grinding, and the grinding particle size can be set as required. After the grinding is finished, the powder is conveyed to the sieving device 7 through the third discharge port 605, the regenerated cement slurry powder enters the inside of the screen 702 through the second spiral fan blade 701, after the sieving, the sieved 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 sieved residues to the third feeding port 601 of the ball milling device 6. The recycled cement paste powder meeting the requirements enters a fifth pipeline 901 of a third conveying device 9 through a fine material outlet 703, a third conveying pump 903 is started to convey the recycled cement paste powder to a calcining device 10, after all the recycled cement paste powder enters a heating bin 1002, a fourth feeding port 1001 is closed, the temperature inside the heating bin is heated to 450-900 ℃, and the calcining time is controlled to be 1-3 hours. And after the regenerated cement paste powder is calcined, opening a fourth discharge hole 1003 to enter a cooling chamber 1004, wherein the temperature of the cooling chamber 1004 is normal temperature, and after the regenerated cement paste powder is cooled for 1-2 hours, conveying the regenerated cement paste powder to a collection box 1006 through a third spiral fan 1005.
The scheme of this embodiment has realized that abandonment premixed concrete to the integrated industrial preparation of activation regeneration cement paste powder, and degree of automation is high.
The air drying device 3 is provided with a temperature measuring and controlling device, a time measuring and controlling device and a weight measuring and controlling device, so that the optimized control of the drying environment of the regenerated cement slurry is realized. The heating temperature range is from room temperature to 300 ℃, the temperature is optimally controlled to be 100-150 ℃, so that the drying efficiency is improved, and the production period of the regenerated cement paste powder is shortened; the drying time is not less than 2h, and the weight change of the regenerated cement slurry is not more than 5% in the last 1h of drying, so that the regenerated cement slurry is fully 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 the 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 at the same time; and the screened coarse material powder can be recycled to the ball milling system for secondary grinding, so that the full grinding utilization of the regenerated cement slurry is realized.
The calcining device 10 is provided with temperature and time measuring and controlling devices, and the high-temperature activation of the regenerated cement paste powder is optimally controlled. The calcination temperature is controlled within the range of 450-900 ℃ and the calcination time is controlled within the range of 1-3h, the requirements of energy consumption and calcination activation efficiency are considered, and the uniform, rapid and efficient activation of the regenerated cement slurry powder is realized.
The scheme of the embodiment realizes the full resource utilization of the waste ready-mixed concrete slurry building solid wastes, and the prepared high-activity regenerated cement paste powder has good auxiliary gelling property and can partially replace the traditional gelling materials such as cement, thereby reducing the increasing shortage degree of limestone resources and high CO caused by cement production on the one hand2Greenhouse gas effect due to emissions; meanwhile, the problems of difficult disposal of the solid waste of the building and environmental pollution caused by random discharge are solved; and the activated regenerated cement paste powder has the characteristics of high quality and high added value and has good economic value. Therefore, the research and development of the integrated industrial preparation device for preparing the recycled cement paste powder by using the waste premixed concrete have good economic, social and environmental benefits, and are an important way for assisting the sustainable development of the cementing material.
The embodiments described in this specification are merely illustrative of implementations of the inventive concepts, which are intended for purposes of illustration only. The scope of the present invention should not be construed as being limited to the particular forms set forth in the examples, but rather as being defined by the claims and the equivalents thereof which can occur to those skilled in the art upon consideration of the present inventive concept.

Claims (10)

1. An integrated device for preparing recycled cement paste powder by using 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 separation device comprises a sand-stone separator, an inlet of the sand-stone separator is connected with a first feeding port for placing the waste premixed concrete, the sand-stone separator is provided with a stone outlet, a sand outlet and a discharge port, the discharge port is communicated with an inlet of the 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 export of first pipeline and filter pressing device's entry linkage, filter pressing device's below export is located air-dry the top of the second pan feeding mouth of drying device the top, air-dry drying device's second discharge gate and first conveyor's access connection, first conveyor's export with breaker's entry meets, breaker's export with ball milling device's third pan feeding mouth meets, ball milling device's third discharge gate with screening plant's entry meets, screening plant is equipped with coarse fodder export and fine material export, the coarse fodder export through second conveyor with ball milling device's third pan feeding mouth meets, the fine material export through third conveyor with calcining device's fourth pan feeding mouth meets, calcining device's export and collecting box are connected.
2. The integrated apparatus for preparing recycled cement paste powder from waste ready-mixed concrete according to claim 1, wherein the separating apparatus has a first inlet installed on the separating support, the first inlet is connected to the inlet of the sand separator through a second pipe, and the outlet of the sand separator is connected to the inlet of the sedimentation tank through a third pipe.
3. The integrated apparatus for preparing recycled cement paste powder from waste ready-mixed concrete according to claim 1 or 2, wherein the filter pressing device comprises a support, a pressing plate, a filter plate, a thrust plate and a cross beam, 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.
4. The integrated apparatus for preparing recycled cement paste powder from waste ready-mixed concrete according to claim 1 or 2, wherein in the air-drying and drying apparatus, an air-drying bin is arranged below the second feeding port, a fan is arranged in the air-drying bin, and a controllable first discharging port is arranged at the bottom of the air-drying bin; the drying bin is arranged below the air drying bin, a drying opening is formed in the drying bin, and a second discharge opening is formed in the bottom of the drying bin.
5. The integrated apparatus for preparing recycled cement paste powder from waste ready-mixed concrete according to claim 1 or 2, wherein the crushing apparatus is a jaw crusher, and is provided with a movable jaw, a fixed jaw and a belt pulley, the fixed jaw is fixed at the left side, the movable jaw is positioned at the right side of the fixed jaw, and the movable jaw is connected with the belt pulley at the same side.
6. The integrated apparatus for preparing recycled cement paste powder from waste ready-mixed concrete according to claim 1 or 2, wherein the ball milling device is provided with a first spiral fan blade below a third feeding port, the middle part of the ball milling device is provided with a barrel body, the ball milling device is supported by a ball milling support, and the right side of the barrel body is provided with a third discharging port.
7. The integrated device for preparing recycled cement paste powder by using waste ready-mixed 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 fan blade and a screen, the inlet of the screening device is connected with the inlet of the second spiral fan blade, the outlet of the second spiral fan blade is communicated with the inner cavity of the screen, and two outlets are arranged below the screening device, one outlet is a fine material outlet, and the other outlet is a coarse material outlet.
8. The integrated apparatus for preparing recycled cement paste powder using waste ready-mixed concrete according to claim 1 or 2, wherein the first conveyor comprises a first conveyor belt and a conveyor frame, the first conveyor belt being mounted on the conveyor frame;
the second conveying device comprises a fourth pipeline, a first support frame and a second conveying pump, the fourth pipeline is installed on the first support frame and 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, the fifth pipeline is installed on the second supporting frame and is provided with an inlet and an outlet, and the fifth pipeline is internally provided with the third conveying pump.
9. The integrated apparatus for preparing recycled cement paste powder from waste ready-mixed concrete according to claim 1 or 2, wherein the fourth feeding port is located above the calcining apparatus, the heating bin is located below the fourth feeding port, the bottom of the heating bin is a discharging port, the cooling bin is located below the heating bin, the third spiral fan blade is arranged in the cooling bin, and the outlet on the right side of the cooling bin is connected with the collecting box.
10. The integrated apparatus for preparing recycled cement paste powder from waste ready-mixed concrete as claimed in claim 1 or 2, wherein said air drying and drying apparatus is provided with temperature, time and weight measuring and controlling devices, said ball milling apparatus is provided with ball milling time controller, said calcining apparatus is provided with temperature and time measuring and controlling devices, said first inlet, second inlet, third inlet and fourth inlet are provided with switches, said air drying and drying apparatus temperature, time and weight measuring and controlling devices, said ball milling time controller of the ball milling apparatus, said calcining apparatus temperature, time measuring and controlling devices, and each switch is connected with control computer.
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