CN112028521B - Integrated industrial preparation device for carbonized regenerated micro powder - Google Patents

Integrated industrial preparation device for carbonized regenerated micro powder Download PDF

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Publication number
CN112028521B
CN112028521B CN202010894059.5A CN202010894059A CN112028521B CN 112028521 B CN112028521 B CN 112028521B CN 202010894059 A CN202010894059 A CN 202010894059A CN 112028521 B CN112028521 B CN 112028521B
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barrel
carbonization
connecting pipe
pretreatment
screen
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CN112028521A (en
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梁超锋
宋科
凌升河
傅莹莹
蔡哲栋
董金虎
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Shaoxing Chengtou Renewable Resources Co ltd
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Shaoxing Chengtou Renewable Resources Co ltd
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00Use 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
    • C04B20/10Coating or impregnating
    • C04B20/1055Coating or impregnating with inorganic materials
    • C04B20/1066Oxides, Hydroxides

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Processing Of Solid Wastes (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

The invention provides an integrated industrialized preparation device of carbonized regenerated micro powder, which comprises a crushing device, a performance improvement pretreatment device, a first conveying device, a ball milling device, a screening device, a second conveying device and a low-humidity pressurizing carbonization system device which are sequentially connected, wherein the ball milling device comprises a support, a barrel body is installed on the support, a second spiral fan blade mechanism is arranged in a second feeding port of the barrel body, a first powder absorber is arranged at the tail end of the barrel body, a discharging port is arranged at the bottom of the barrel body, a middle rotating bin is arranged below the discharging port, the screening device comprises a vibrating instrument, a screening barrel is arranged on the vibrating instrument, a screening cover is arranged on the screening barrel, a screen mesh is arranged in the screening barrel, a first connecting pipe is arranged below the screen mesh in the screening barrel, the first connecting pipe is connected with a cyclone barrel, the cyclone barrel is connected with the second powder absorber through a second connecting pipe, a third connecting pipe is arranged above the screen mesh in the screening barrel, and is connected with the first powder absorber, the invention provides an integrated industrial preparation device for carbonized regenerated micro powder with high production efficiency.

Description

Integrated industrial preparation device for carbonized regenerated micro powder
Technical Field
The invention relates to the technical field of environmental protection equipment, in particular to an integrated industrial preparation device for carbonized and regenerated micro powder.
Background
The application numbers are: chinese patent No. cn201711136024.x discloses a solid waste recycled aggregate carbonizing apparatus for concrete, which mainly comprises a material waiting bin, a drum-type carbonizing bin and a storage bin. After carbonization starts, CO2 enters from the waiting bin, the roller bin starts to rotate so as to increase the contact area between aggregate and CO2, the carbonized aggregate enters water from a discharge drain pipe at the bottom of the storage bin, and the carbonized aggregate in the water pool is lifted to a stock ground by the rotary ladder to be stacked for later use.
Aiming at the working principle of the device, the carbonization efficiency and carbonization effect of the recycled aggregate are not good enough. The efficiency of the carbonization of the recycled aggregate is influenced by temperature, humidity and CO2Concentration and air pressure. The device can only control CO of the carbonization bin2The concentration is not optimally controlled according to the carbonization conditions such as temperature, humidity, air pressure and the like, so that the carbonization period of the recycled aggregate is long, and the industrialization is difficult to meetAnd (5) production demand.
Because the recycled aggregate surface layer old mortar contains Ca (OH)2The carbonizable chemical components are limited, the carbonization effect is poor, and the quality improvement of the carbonized recycled aggregate is limited. Meanwhile, the water content of the recycled aggregate has a remarkable influence on the carbonization efficiency of the recycled aggregate, and the overhigh or overlow water content has a negative influence on the carbonization efficiency of the recycled aggregate. The device does not carry out pretreatment before carbonization on factors such as the water content, the carbonizable substance and the like of the recycled aggregate.
The device is only used for carbonizing the recycled aggregate, does not form integrated production from construction waste to carbonized recycled micro powder, and does not perform pretreatment on the recycled aggregate, optimize control on the carbonization condition of the recycled aggregate and the like.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an integrated industrial preparation device of carbonized regenerated micro powder with high production efficiency, and solves the problems in the background technology.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: an integrated industrial preparation device for carbonized regenerated micro powder comprises a crushing device, a performance improvement pretreatment device, a first conveying device, a ball milling device, a screening device, a second conveying device and a low-humidity pressurization carbonization system device which are sequentially connected, wherein the performance improvement pretreatment device comprises a pretreatment box, a first feeding port matched with the output end of the crushing device is arranged on the pretreatment box, a pretreatment solution storage box is arranged at the top of the pretreatment box, the pretreatment solution storage box is connected with a plurality of nozzles positioned in the pretreatment box, a first spiral fan blade mechanism is arranged in the pretreatment box, a drying port is arranged in the pretreatment box, the drying port is connected with an air blower, the ball milling device comprises a support, a barrel body is mounted on the support, a second spiral fan blade mechanism is arranged in the second feeding port of the barrel body, and a first powder absorber is arranged at the tail end of the barrel body, the bottom of ladle body is equipped with the discharge gate, the below of discharge gate is equipped with the transfer storehouse, screening plant includes the vibrometer, be equipped with the sieve bucket that is located the transfer storehouse below on the vibrometer, be equipped with the screen lid on the sieve bucket, be equipped with the screen cloth in the sieve bucket, the below that corresponds the screen cloth in the sieve bucket is equipped with first connecting pipe, first connecting pipe is connected with the whirlwind bucket, the whirlwind bucket is connected with the second through the second connecting pipe and inhales the powder ware, the top that corresponds the screen cloth in the sieve bucket is equipped with the third connecting pipe, the first powder ware of inhaling of third connecting pipe connection.
Further, breaker includes the base, be equipped with the frame on the base, the top of frame is equipped with the third pan feeding mouth, be equipped with two crushing rollers on the frame, wherein the crushing roller is connected with adjusting device, the below that corresponds the crushing roller on the base is equipped with first conveyer belt.
Further, the low-humidity pressurizing carbonization system device comprises a carbonization box, a carbon dioxide tank and a pneumatic pump, wherein the carbon dioxide tank and the pneumatic pump are respectively connected with the carbonization box through a fourth connecting pipe and a fifth connecting pipe, a fourth feeding port is formed in one end of the carbonization box, a third spiral fan blade mechanism is arranged in the carbonization box, an outlet is formed in the bottom of the other end, corresponding to the fourth feeding port, of the carbonization box, and a collecting box is connected to the outlet.
Furthermore, the first conveying device comprises a first support frame, and an inclined second conveying belt is arranged on the support frame.
Furthermore, the second conveyer includes second support frame and regeneration differential delivery pump, be equipped with the pipeline of slope on the second support frame, regeneration differential delivery pump connects in the bottom of pipeline, be equipped with the fifth pan feeding mouth on the pipeline, the bottom exit linkage fifth pan feeding mouth of whirlwind bucket.
Furthermore, a heat insulation material protective cover and a heating plate are arranged in the low-humidity pressurizing carbonization system device and the performance improvement pretreatment device.
(III) advantageous effects
The invention provides an integrated industrial preparation device for carbonized regenerated micro powder. The method has the following beneficial effects:
1. the invention can realize the integrated industrial preparation of the construction solid waste to carbonized regenerated micro powder by utilizing the crushing device, the performance improvement pretreatment device, the first conveying device, the ball milling device, the screening device, the second conveying device and the low-humidity pressurizing carbonization system device which are connected in sequence, and has high automation degree.
2. The crushing device is provided with the crushing pipes with adjustable intervals, so that the construction solid waste is crushed into the recycled aggregate with different particle size requirements, and the pretreatment efficiency and the grinding efficiency of the recycled aggregate are improved.
3. The performance improvement pretreatment device is provided with a spray device which uses Mg (OH)2、Ca(OH)2When the alkaline solution is sprayed to pretreat the aggregate, not only can the dust on the surface layer of the recycled aggregate be removed, but also the recycled aggregate can absorb the alkaline solution, the carbonizable substance is increased, and the quality of carbonized recycled micro powder is improved; be equipped with first spiral flabellum mechanism in the performance promotion preprocessing device, can realize the regeneration aggregate and spray and the homogeneity of drying to and the regeneration aggregate entering first conveyor after the propelling movement performance promotes. The performance improvement pretreatment device is provided with an air blower and a heating device, and can dry the recycled aggregate, so that preparation is made for ball milling of the recycled aggregate.
4. The ball milling device is provided with a ball milling time controller, and the ball milling time is optimized, so that the recycled aggregate can be ball milled to the recycled powder with the optimized particle size.
5. The screening device is provided with a second powder suction device, has a negative pressure powder suction function, and can work simultaneously with the vibrating screen, so that the screening efficiency of the regenerated micro powder can be obviously improved; and the screened powder can be recycled to the ball milling device for secondary grinding, so that the full grinding utilization of the solid wastes of the building is realized.
6. The low-humidity pressurizing carbonization system device is provided with air pressure, humidity, temperature and CO2The concentration measuring and controlling device realizes the optimized control of the carbonization environment; increasing the air pressure to 0.1-1.0 Bar, which can accelerate the carbonization of the regenerated powder; controlling the humidity within the range of 40-60%, and considering both the humidity required by rapid carbonization and the prevention of agglomeration of carbonized regenerated micro powder; controlling the carbonization temperature at 10-30 deg.C under the greenhouse condition of CO2The concentration is between 20 and 100 percent, and the requirements of energy consumption and carbonization efficiency are considered; the low-humidity pressurizing carbonization system device is provided with a third spiral fan blade machineThe structure can intermittently turn the regenerated micro powder, thereby realizing the uniform and rapid carbonization of the regenerated micro powder
Drawings
FIG. 1 is a schematic structural diagram of an integrated industrial preparation device for carbonized and regenerated micro powder according to the present invention;
FIG. 2 is a schematic view of the crushing apparatus;
FIG. 3 is a schematic diagram of a performance enhancing pretreatment apparatus;
FIG. 4 is a schematic structural diagram of a first transfer device;
FIG. 5 is a schematic structural view of a ball milling apparatus;
FIG. 6 is a schematic diagram of the construction of the screening device;
FIG. 7 is a schematic structural view of a second conveyor;
fig. 8 is a schematic structural diagram of a low-humidity pressurized carbonization system device.
Description of the labeling: 1. a crushing device; 101. a third feeding port; 102. a crushing roller; 103. an adjustment device; 104. a first conveyor belt; 105. a base; 106. a machine base; 2. a performance-enhancing pretreatment device; 201. a first feeding port; 202. a pretreatment solution storage tank; 203. a spray head; 204. a blower; 205. drying the opening; 206. a first helical fan blade mechanism; 207. a pretreatment tank; 3. a first conveying device; 301. a second conveyor belt; 302. a first support frame; 4. a ball milling device; 401. a second feeding port; 402. a second helical fan blade mechanism; 403. a barrel body; 404. a first powder absorber; 405. a support; 406. a discharge port; 407. a transfer bin; 5. a screening device; 501. a screen cover; 502. screening a screen; 503. a screen barrel; 504. a vibration meter; 505. a first connecting pipe; 506. a cyclone barrel; 507. a second connecting pipe; 508. a second powder suction device; 509. a third connecting pipe; 6. a low humidity pressurized carbonation system apparatus; 601. a fourth feeding port; 602. a third helical fan blade mechanism; 603. a fourth connecting pipe; 604. a carbon dioxide tank; 605. a fifth connecting pipe; 606. a pneumatic pump; 607. an outlet; 608. a collection box; 609. a carbonization tank; 7. a second conveying device; 701. a regenerative differential transfer pump; 702. a pipeline; 703. a second support frame.
Detailed Description
An embodiment of an integrated industrial production apparatus for carbonized regenerated fine powder according to the present invention will be further described with reference to fig. 1 to 7.
An integrated industrial preparation device for carbonized regenerated micro powder comprises a crushing device 1, a performance improvement pretreatment device 2, a first conveying device 3, a ball milling device 4, a screening device 5, a second conveying device 7 and a low-humidity pressurization carbonization system device 6 which are sequentially connected, wherein the performance improvement pretreatment device 2 comprises a pretreatment box 207, a first feeding port 201 matched with the output end of the crushing device 1 is arranged on the pretreatment box 207, a pretreatment solution storage box 202 is arranged at the top of the pretreatment box 207, the pretreatment solution storage box 202 is connected with a plurality of spray heads 203 positioned in the pretreatment box 207, a first spiral fan blade mechanism 206 is arranged in the pretreatment box 207, a drying port 205 is arranged in the pretreatment box 207, the drying port 205 is connected with an air blower 204, the ball milling device 4 comprises a support 405, and a barrel 403 is arranged on the support 405, a second spiral fan blade mechanism 402 is arranged in a second feeding port 401 of the barrel body 403, a first powder absorber 404 is arranged at the tail end of the barrel body 403, a discharging port 406 is arranged at the bottom of the barrel body 403, a middle rotating bin 407 is arranged below the discharging port 406, the screening device 5 comprises a vibrating instrument 504, a screen barrel 503 positioned below the middle rotating bin 407 is arranged on the vibrating instrument 504, a screen cover 501 is arranged on the screen barrel 503, a screen 502 is arranged in the screen barrel 503, a first connecting pipe 505 is arranged in the screen barrel 503 and below the screen 502, the first connecting pipe 505 is connected with a cyclone barrel 506, the cyclone barrel 506 is connected with a second powder absorber 508 through a second connecting pipe 507, a third connecting pipe 509 is arranged in the screen barrel 503 and above the screen 502, the third connecting pipe 509 is connected with the first powder absorber 404, the crushing device 1 comprises a base 105, a base 106 is arranged on the base 105, the top of the machine base 106 is provided with a third feeding port 101, the machine base 106 is provided with two crushing rollers 102, wherein the crushing rollers 102 are connected with an adjusting device 103, a first conveyor belt 104 is arranged on the base 105 and below the crushing rollers 102, the low-humidity pressurized carbonization system device 6 comprises a carbonization tank 609, a carbon dioxide tank 604 and a pneumatic pump 606, the carbon dioxide tank 604 and the pneumatic pump 606 are respectively connected with the carbonization tank 609 through a fourth connecting pipe 603 and a fifth connecting pipe 605, one end of the carbonization tank 609 is provided with a fourth feeding port 601, a third spiral fan blade mechanism 602 is arranged in the carbonization tank 609, an outlet 607 is arranged at the bottom of the other end of the carbonization tank 609 corresponding to the fourth feeding port 601, the outlet 607 is connected with a collecting box 608, the first conveyor device 3 comprises a first support frame 302, the support frame is provided with an inclined second conveyor belt 301, the second conveyor device 7 comprises a second support frame 703 and a regenerative differential conveyor pump 701, an inclined pipeline 702 is arranged on the second supporting frame 703, the regenerative differential delivery pump 701 is connected to the bottom end of the pipeline 702, a fifth feeding port is arranged on the pipeline 702, and an outlet 607 at the bottom of the cyclone barrel 506 is connected with the fifth feeding port.
When production is carried out, building solid waste is conveyed to the third feeding port 101 of the crushing system from a stacking point by a conveying belt, is crushed by the crushing roller 102, regenerated aggregate is prepared, the distance between the crushing rollers 102 can be controlled by a computer according to different requirements, so that the crushing of different regenerated aggregate size requirements is realized, and the crushed regenerated aggregate is automatically conveyed to the first feeding port 201 of the performance improvement pretreatment box 207 from the crushing system by the first conveying belt 104 for regeneration aggregate pretreatment.
The recycled aggregate entering the performance improvement pretreatment device 2 is Mg (OH) through a control spray nozzle 2032、Ca(OH)2(0.01mol/kg) and other alternative solutions are sprayed, and the first spiral fan blade mechanism 206 is started to continuously stir, so that the recycled aggregate is subjected to pretreatment for uniformly increasing the carbide quality; the internal temperature is heated to 105 ℃ through the blower 204, and the heating is continued for 2-6 hours, during which the first spiral fan blade mechanism 206 continuously stirs, so that the aggregate is uniformly heated. Spraying-drying circulation can be carried out for 1-3 times according to requirements. Starting the first spiral fan blade mechanism 206, conveying the pretreated recycled aggregate to the second conveyor belt 301, conveying the performance-improved dry recycled aggregate to the ball milling device 4 through the second conveyor belt 301 for grinding treatment, conveying the dry recycled aggregate to the second feeding port 401, and conveying the aggregate to the inner barrel body 403 through the second spiral fan blade mechanism 402 for grinding treatmentGrinding, the particle size of the powder ball milling can be set according to the requirement. After the powder ball milling is finished, the powder is automatically discharged to a transfer bin 407 from a discharge port 406; the middle rotating bin 407 controls the quality of the regenerated micro powder to be screened, a screen cover 501 is opened to enter a screen barrel 503, a vibration instrument 504 and a second powder suction device 508 can be opened, negative pressure is formed by a first connecting pipe 505 and a second connecting pipe 507 on the right side after the second powder suction device 508 is opened, powder particles passing through a screen 502 are collected through the negative pressure, the powder particles enter a cyclone barrel 506 through the first connecting pipe 505, and the powder particles are input to a regenerated breeze conveying pump after being screened; after the vibrating instrument 504 is started, the screening process can be accelerated, after the screening process is finished, the third connecting pipe 509 on the upper side of the screen 502 is started, the first connecting pipe 505 and the cyclone barrel 506 on the lower side are closed, screen residues are sucked into the first powder suction device 404 of the ball milling device 4, the circular ball milling is realized, and after the whole screening process is finished, the regenerated micro powder in the regenerated micro powder conveying pump is conveyed to the low-humidity pressurizing carbonization system; after all the regenerated micro powder enters the low-humidity pressurizing carbonization system device 6, the fourth feeding port 601 is closed, the interior of the system is firstly vacuumized to-0.1 to-0.5 bar by the air pressure pump 606, and then pure CO in the carbon dioxide tank 604 is added2(99.5%) into the chamber; further using a gas regulator to control the pressure of the low-humidity pressurized carbonization system to be maintained at 0.1-1.0 bar. In the carbonization process, the third spiral fan blade mechanism 602 is started to uniformly carbonize all the regenerated micro powder; the controller is arranged in the low-humidity pressurizing carbonization system device 6, the environment temperature and the humidity for regulating the carbonization of the regenerated micro powder can be regulated and controlled, the carbonization condition can be regulated and controlled according to different requirements, the outlet 607 is opened after the carbonization is finished, the third spiral fan blade mechanism 602 conveys the carbonized regenerated micro powder to the collecting box 608, the full utilization of the resources of the construction solid wastes such as waste concrete, waste concrete blocks, waste commercial concrete drying slurry and the like is realized by the arrangement, the prepared carbonized regenerated micro powder has good auxiliary gelling property, the traditional gelling materials such as cement and the like can be partially replaced, and therefore, on one hand, the consumption of natural limited resources such as limestone and the like and the consumption of high CO (carbon monoxide) caused by cement production are reduced, and the prepared carbonized regenerated micro powder has good auxiliary gelling property2Greenhouse 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; the carbonized regenerated micro powder can absorb the emission C of industries such as cement, steel, thermoelectricity and the likeO2The gas and carbonized regenerated micro powder has the characteristics of high quality and high added value and has good economic value. Therefore, the integrated industrial preparation device for the carbonized regenerated micro powder is developed and developed, and has good economic, social and environmental benefits.
The low-humidity pressurizing carbonization system device 6 and the performance improvement pretreatment device 2 are both provided with heat insulation material protective covers, heating plates are additionally arranged in the low-humidity pressurizing carbonization system device, a temperature controller can control the temperature of the heating plates, and when the temperature of the heating plates is higher than an alarm temperature, the controller can cut off all power supplies, so that the carbonization efficiency is ensured, and the use safety is also ensured.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (4)

1. The utility model provides an integration industrialization preparation facilities of carbonization regeneration miropowder which characterized in that: the device comprises a crushing device, a performance improvement pretreatment device, a first conveying device, a ball milling device, a screening device, a second conveying device and a low-humidity pressurization carbonization system device which are sequentially connected, wherein the performance improvement pretreatment device comprises a pretreatment box, a first feeding port matched with the output end of the crushing device is arranged on the pretreatment box, a pretreatment solution storage box is arranged at the top of the pretreatment box and connected with a plurality of nozzles positioned in the pretreatment box, a first spiral fan blade mechanism is arranged in the pretreatment box, a drying port is arranged in the pretreatment box and connected with an air blower, the ball milling device comprises a support, a barrel body is arranged on the support, a second spiral fan blade mechanism is arranged in the second feeding port of the barrel body, a first powder absorber is arranged at the tail end of the barrel body, and a discharge port is arranged at the bottom of the barrel body, a transfer bin is arranged below the discharge port, the screening device comprises a vibration instrument, a screen barrel positioned below the transfer bin is arranged on the vibration instrument, a screen cover is arranged on the screen barrel,the powder screening device is characterized in that a screen is arranged in the screen barrel, a first connecting pipe is arranged below the screen in the screen barrel, the first connecting pipe is connected with a cyclone barrel, the cyclone barrel is connected with a second powder suction device through a second connecting pipe, a third connecting pipe is arranged above the screen in the screen barrel, the third connecting pipe is connected with the first powder suction device, the performance improvement pretreatment device is provided with a spraying device, and Mg (OH)2、Ca(OH)2Alkaline solution sprays the preliminary treatment aggregate, improves the carbonization composition of regeneration differential, all be equipped with thermal-insulated material quality protection cover and hot plate in low humidity pressure boost carbonization system device and the performance promotion preprocessing device, low humidity pressure boost carbonization system device includes carbonization case, carbon dioxide jar and pneumatic pump are connected with the carbonization case through fourth connecting pipe and fifth connecting pipe respectively, the one end of carbonization case is equipped with the fourth pan feeding mouth, be equipped with third helical fan blade mechanism in the carbonization case, the carbonization case is equipped with the export corresponding to the other end bottom of fourth pan feeding mouth, exit linkage has the collecting box.
2. The integrated industrial production device of carbonized regenerated micropowder according to claim 1, characterized in that: the crushing device comprises a base, a base is arranged on the base, a third feeding port is formed in the top of the base, two crushing rollers are arranged on the base, the crushing rollers are connected with an adjusting device, and a first conveying belt is arranged below the base corresponding to the crushing rollers.
3. The integrated industrial production device of carbonized regenerated micropowder according to claim 1, characterized in that: the first conveying device comprises a first support frame, and an inclined second conveying belt is arranged on the support frame.
4. The integrated industrial production device of carbonized regenerated micropowder according to claim 1, characterized in that: the second conveying device comprises a second supporting frame and a regenerative differential conveying pump, an inclined pipeline is arranged on the second supporting frame, the regenerative differential conveying pump is connected to the bottom end of the pipeline, a fifth feeding port is arranged on the pipeline, and an outlet at the bottom of the cyclone barrel is connected with the fifth feeding port.
CN202010894059.5A 2020-08-31 2020-08-31 Integrated industrial preparation device for carbonized regenerated micro powder Active CN112028521B (en)

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GB963111A (en) * 1962-03-02 1964-07-08 Baker Perkins Ltd Improvements in or relating to sifting apparatus
JPS54149071A (en) * 1978-05-15 1979-11-21 Nippon Kokan Kk <Nkk> Loading prevention method of screening device in crusher/ granule-arranging device for ores
US7971817B1 (en) * 2009-03-06 2011-07-05 Rossi Jr Robert R Compact mobile crushing and screening apparatus
CN106495516B (en) * 2016-10-24 2018-07-03 厦门天润锦龙建材有限公司 Recycled aggregate pre-processing device
US20190375682A1 (en) * 2018-06-06 2019-12-12 Nautilus Aggregates, LLC Method and apparatus for production of lightweight aggregates by thermal treatment in a fluidized bed

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