CN110681475A - Crushing production line and method for processing high-quality sandstone aggregate based on hard rock - Google Patents

Crushing production line and method for processing high-quality sandstone aggregate based on hard rock Download PDF

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Publication number
CN110681475A
CN110681475A CN201911135707.2A CN201911135707A CN110681475A CN 110681475 A CN110681475 A CN 110681475A CN 201911135707 A CN201911135707 A CN 201911135707A CN 110681475 A CN110681475 A CN 110681475A
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CN
China
Prior art keywords
crushing
equipment
fine
screening
dust
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CN201911135707.2A
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Chinese (zh)
Inventor
朱东敏
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GUIZHOU CHENGZHI HEAVY INDUSTRY SCI-TECH Co Ltd
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GUIZHOU CHENGZHI HEAVY INDUSTRY SCI-TECH Co Ltd
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Priority to CN201911135707.2A priority Critical patent/CN110681475A/en
Publication of CN110681475A publication Critical patent/CN110681475A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C21/00Disintegrating plant with or without drying of the material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary 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
    • B02C23/02Feeding devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary 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
    • B02C23/08Separating or sorting of material, associated with crushing or disintegrating
    • B02C23/14Separating or sorting of material, associated with crushing or disintegrating with more than one separator
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B02CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02CCRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C23/00Auxiliary 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
    • B02C23/18Adding fluid, other than for crushing or disintegrating by fluid energy

Abstract

The invention discloses a crushing production line and a method for processing high-quality sandstone aggregate based on hard rock, which comprises multistage mixed pre-crushing equipment, desliming equipment, multistage screening and grading equipment, a fine-quality coarse and fine aggregate processing system, a finished product screening and proportion adjusting circulating processing system and multistage powder selecting equipment which are sequentially and circularly connected, wherein a dust removing point of the equipment is connected with a dust collecting system, and a discharge port of the dust collecting system is connected with a fine stone powder processing system; the device controls the devices to cooperate with each other through the PLC control system, so that multi-stage desliming and multi-stage mixed crushing of various types of raw materials, particularly superhard rocks can be realized, the processing capacity is high, the damage rate to the crushing device is low, the maintenance cost of the device is reduced, the service life of the device is long, and the practicability is good; and moreover, dust generated in the whole crushing production line is treated by adopting a stone powder finish machining process, so that the stone powder is recycled, and the method has good economic practicability.

Description

Crushing production line and method for processing high-quality sandstone aggregate based on hard rock
Technical Field
The invention relates to a crushing production line and a crushing production method for processing high-quality sandstone aggregate based on hard rock, and belongs to the technical field of sand making production equipment and sand making production processes.
Background
Application No. 2019101516208 discloses a five-double full dry method crushing production line and a processing method for high-quality sandstone aggregate, which adopt multi-stage desliming and double-impact crushing processes to perform raw material treatment, and a manufacturing production line with double-vertical-shaft impact crushing and shaping sand making, multi-stage powder selection and multi-stage circulation effectively improves system productivity and controls the stone powder content of finished sandstone aggregate, can efficiently produce the quality of finished sandstone aggregate, and is efficient and energy-saving. The crushing head of the double-impact crushing equipment has the advantages of high hardness, good wear resistance, good particle shape of various processed raw materials and the like, but the crushing head has high brittleness, is usually only suitable for processing hard rock raw materials with lower or middle hardness coefficients, is easy to break when processing hard rock raw materials with higher or ultrahigh hardness coefficients, not only influences the production efficiency, but also increases the equipment replacement and maintenance cost, and has low practicability.
In addition, a large amount of dust materials are generated in the existing sand production line, the dust materials are stone powder with the particle size smaller than 0.075mm and other large-diameter material mixtures, the dust mixtures are uneven in thickness, too thick materials seriously affect the activity of concrete, the dust materials are generally considered as substances harmful to machine-made sand concrete, so that strict control is required in national standards, even some places are washed with water, air separation equipment and dust removal equipment are generally adopted to collect the dust materials of all production points, particularly, the air speed is designed to be large to control the stone powder content of finished sand and avoid environmental pollution and pipe blockage caused by dust raising of the production line, the collected dust materials are thick, the collected materials can be mixed into the concrete in a small amount, and the rest materials need to be manually found and piled up and buried, so that not only is great waste caused, but also the environment is damaged, causing environmental pollution.
Disclosure of Invention
The invention aims to solve the technical problem of providing a crushing production line and a crushing production method for processing high-quality sandstone aggregate based on hard rock, which can overcome the defects of the prior art.
In order to solve the technical problems, the invention is realized by the following technical scheme: a crushing production line for processing high-quality gravel aggregate based on hard rock comprises a raw material bin and a bar feeder connected with the raw material bin, wherein a discharge port at the front end of the bar feeder is provided with two or more stages of mixed pre-crushing equipment, and a fine material outlet below the bar feeder is provided with desliming, screening and grading equipment; the discharge port of the mixed pre-crushing equipment is connected with multi-stage screening grading equipment, the discharge port at the bottom of the screening grading equipment is connected to a common sand bin and/or a transit bin, and the discharge port at the front end is circularly connected to the mixed pre-crushing equipment and/or the transit bin; the discharge port of the transfer bin is connected with a sandstone aggregate finish machining system; the discharge port of the sand and stone aggregate finish machining system is connected with the multi-stage powder selecting equipment and/or connected to a corresponding stock bin;
the dust removing points of the equipment are connected with a dust collecting system through a dust removing pipeline, and a discharge port of the dust collecting system is connected with a stone powder finish machining system;
the devices are all connected with a PLC control system for controlling mutual cooperation of the devices.
The mixed pre-crushing equipment comprises a jaw crusher and at least two impact crushers connected in series, wherein the impact crushers are arranged in parallel; the feed inlet of the jaw crusher is connected with the bar feeder, and the discharge outlet is connected to the feed inlet of the impact crusher through a screening and grading device; the discharge port of the impact crusher is circularly connected to the screening and grading equipment and/or the middle transfer bin.
The number of stages of the screening and grading equipment is matched with that of the mixing and pre-crushing equipment; the mixed pre-crushing equipment comprises a jaw crusher, a cone crusher and a reaction crusher which are sequentially connected in series, wherein a feed inlet of the jaw crusher is connected with the bar feeder, and a discharge outlet of the jaw crusher is connected to the cone crusher through primary screening and grading equipment; the discharge port of the cone crusher is connected to the impact crusher through secondary screening and grading equipment; and the discharge port of the impact crusher is circularly connected to the three-stage screening and grading equipment and/or the middle-turning bunker.
The fine processing system for the stone powder comprises a flour mill, wherein a feed inlet of the flour mill is connected with a dust collecting system through a feeding device, an air blower and an air blowing pipeline of the air blower are arranged on one side of the flour mill, a classifier and a cyclone collector are sequentially connected to the upper portion of the flour mill through the air blowing pipeline, and a discharge port of the cyclone collector is connected to a finished stone powder bin.
The flour mill is a longitudinal pendulum flour mill; the feeding device is a tubular spiral constant feeder or a metering operation belt; the air blower and the cyclone collector are arranged in a variable-frequency mode.
A dispersion machine is arranged in the flour mill; and a blast pipeline of the blower is connected with a pulse dust collector through a residual pipe.
A crushing production method for processing high-quality sandstone aggregate based on hard rock comprises the following steps:
s1, performing material pretreatment by adopting two-stage or more than two-stage mixed pre-crushing equipment and screening and grading equipment;
s2, circularly preparing a fine sand-gravel aggregate mixture by adopting a fine coarse-fine aggregate processing system and a finished product screening and proportion adjusting circular processing system, screening and grading the fine sand-gravel aggregate mixture, and preparing fine sand and aggregate with different specifications according to the proportion;
s3, performing multi-stage powder selection on the refined sand to prepare various refined sands with different stone powder contents;
and s4, conveying the dust collected by the dust removal equipment to a stone powder finishing system to prepare finished stone powder.
In the step s1, after primary extrusion crushing and primary desliming are carried out on the raw materials, more than two stages of impact crushing and desliming are circularly carried out;
or after the primary extrusion type crushing and the primary desliming are carried out on the raw materials, the secondary extrusion type crushing and the secondary desliming are carried out, and the impact type crushing and the tertiary desliming are carried out more than three levels in a recycling mode.
In the steps s2 and s3, a double-speed double-frequency crushing sand making process is adopted to make the pretreated material into a fine sand aggregate mixture, after the mixture is subjected to pre-selection of powder, the mixture material is screened and made into aggregates and fine sand with different fineness modulus according to a proportion, and multistage powder selection corresponding to the fine sand is performed to make fine sand with different stone powder contents.
In the step s4, quantitatively feeding the dust into the mill for fine grinding by the feeding device; and then wind power selection is carried out through a classifier, stone powder with the particle size below is collected, and meanwhile, the rest super-particle dust is circulated into a flour mill for fine grinding.
Compared with the prior art, the invention discloses a crushing production line and a method for processing high-quality sandstone aggregate based on hard rock, which comprises two or more stages of mixed pre-crushing equipment and correspondingly connected multi-stage screening and grading equipment, wherein a discharge port of the screening and grading equipment is circularly connected to the mixed pre-crushing equipment and a fine coarse and fine aggregate processing system, the fine coarse and fine aggregate processing system is connected with a finished product screening and proportion adjusting circular processing system, and a discharge port of the finished product screening and proportion adjusting circular processing system is circularly connected to a feed port of the fine coarse and fine aggregate processing system or a corresponding bin; and a multi-stage powder selecting device is arranged below a fine sand discharge port of the finished product screening and proportion adjusting circulating processing system, and the multi-stage powder selecting device is used for manufacturing various fine sands with different stone powder contents; the dust removing point of the equipment is connected with a dust collecting system, and the discharge port of the dust collecting system is connected with a fine stone powder processing system; and the devices are all connected with a PLC control system for controlling the devices to cooperate with each other. Firstly, more than one stage of extrusion type crushing and cyclic impact type crushing are carried out through mixed pre-crushing equipment to realize raw material pretreatment of materials; then the pretreated materials are crushed by conventional and high-frequency impact to prepare a fine sand-stone aggregate mixture, and the mixture is sieved according to particle size specifications, the discharge proportion of various particle size specifications is adjusted, and aggregates and fine sand with various fineness moduli are prepared; finally, performing multi-stage powder selection on the fine sand, and further regulating and controlling the stone powder content of the fine sand; meanwhile, the dust of the whole crushing production line is treated by a stone powder finish machining system, and the stone powder finish machining system adopts a circulating grinding process and combines wind power for grading and selecting powder, so that the dust can be treated into stone powder with the particle size of less than 0.044 mm.
The mixed-lapping pre-crushing equipment is strong in processing capacity and wide in application range, is particularly suitable for processing hard rock raw materials with high or ultrahigh hardness coefficients, combines the advantages of extrusion type crushing equipment and impact type crushing equipment, can greatly reduce the damage of the ultra-hard rock on the equipment when the ultra-hard rock is crushed, and prolongs the service life of the equipment; and the crushing efficiency is high, and the good particle type of the material is ensured.
The sand making equipment is double-speed double-frequency crushing sand making equipment for making sand, can realize circulating sand making, can flexibly regulate and control the sand making frequency, is high in sand making efficiency, energy-saving and environment-friendly, and can effectively improve the sand outlet efficiency of fine sand by adopting high-frequency crushing, thereby meeting the sand making requirement.
The finished product screening and proportion adjusting circular processing system comprises a distributor or a finished product sand fineness modulus adjusting device which is matched with finished product screening and grading equipment, and can accurately adjust and control the discharge proportion of the sandstone aggregates with various specifications to prepare the finished product sand with different fineness moduli. The sand fineness modulus regulating and controlling device is simple in structure, low in manufacturing cost, high in flexibility, high in fineness modulus regulating and controlling precision of finished sand, capable of improving product quality and capable of guaranteeing stable product quality.
The stone powder finish machining system comprises a flour mill, an air blower, a classifier, a cyclone collector and the like, and waste dust generated in the whole crushing production line is treated and recycled by adopting a grinding process and combining wind power powder selection.
The invention has the following beneficial effects:
(1) when the raw materials are pretreated, the multistage desliming and multistage mixing crushing can be realized, the treatment capacity is strong, the requirements on the raw materials are low, and the cleanness and good particle shape of the subsequent materials are ensured; the device has wide application range, can be used for treating rock raw materials with various hardness coefficients, has low damage rate to crushing equipment, reduces the maintenance cost of the equipment, and has long service life and good practicability.
(2) The sand making is carried out by combining a double-impact crushing process with a multistage circulating manufacturing production line, the crushing ratio performance of vertical shaft crushing is fully exerted, the optimal crushing ratio of the sand making production line is realized, the system capacity and the quality of finished sand and stone aggregates are greatly improved, and the efficiency and the energy conservation are realized; in addition, the stone powder of the machine-made sand is effectively controlled so as to meet the preparation requirements of various concrete strength on low cost, the quality of fine sand is effectively improved, and the stability and the safety of the concrete are further improved.
(3) The fine processing technology of the stone powder is adopted to process the dust generated in the whole crushing production line, and the stone powder with the particle size of less than 0.044mm and good activity is prepared, and can be used for mixing concrete to replace fly ash, cement and the like in the concrete; the dust-collecting device can change dust into valuables, improves the utilization rate of waste dust, solves the problems of manpower waste, material resources waste, environmental pollution and the like caused by manual stacking and landfill of the existing dust, and has good economical and practical properties.
Drawings
Fig. 1 is a schematic workflow diagram of a first embodiment of the present invention.
Fig. 2 is a schematic workflow diagram of a second embodiment of the present invention.
Fig. 3 is a schematic workflow diagram of a third embodiment of the present invention.
Fig. 4 is a schematic workflow diagram of a fourth embodiment of the present invention.
FIG. 5 is a schematic view of the stone dust finishing system of the present invention.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention:
as shown in FIG. 1 ~ and FIG. 4, a crushing production line for processing high-quality sandstone aggregate based on hard rock comprises a raw material bin 1 and a rod feeding device 2 connected with the raw material bin, wherein a discharge port at the front end of the rod feeding device 2 is provided with two or more stages of mixed pre-crushing devices, discharge ports of the mixed pre-crushing devices are connected with multistage screening grading devices 5, discharge ports at the bottoms of the screening grading devices 5 are connected to a common sand bin 23 and/or a transit bin 8, discharge ports at the front ends are circularly connected to the mixed pre-crushing devices and/or the transit bin 8, discharge ports of the transit bin 8 are connected with a sandstone aggregate finishing system, a fine material outlet at the lower part of the rod feeding device is provided with a desliming screening device 6, materials at the lower part of the desliming screening device 6 enter a waste bin 7, and oversize materials are circularly connected to the mixed pre-crushing devices for continuous processing, discharge ports of the aggregate finishing system are connected with multistage powder selecting devices 15 and/or corresponding bins 16, and the multistage powder selecting devices 15 are used for manufacturing various fine sand products with different stone powder contents;
the dust removing points of the equipment are connected with a dust collecting system 14 through a dust removing pipeline, and a discharge port of the dust collecting system 14 is connected with a stone powder finish machining system 17;
the devices are all connected with a PLC control system for controlling mutual cooperation of the devices.
Be equipped with one-level selection powder equipment 10 between fine work coarse and fine aggregate processing system 9 and the finished product screening and proportion regulation circulation system, follow the mixed material that fine work coarse and fine aggregate processing system 9 bin outlet can reduce its dust content after the powder is preselected to one-level selection powder equipment 10, not only improves the system sand quality, can prevent moreover that finished product screening and proportion regulation circulation system from producing the putty phenomenon, and then improves production efficiency.
The desliming screening classification equipment 5 arranged in multiple stages is a vibrating screen arranged more than two, and the specific stages of the vibrating screen are matched and arranged according to the mixed pre-crushing equipment.
Referring to fig. 1 and 2, the mixing and pre-crushing equipment comprises a jaw crusher 3 and an impact crusher 4 connected in series, wherein at least two impact crushers 4 are arranged in parallel; the feed inlet of the jaw crusher 3 is connected with the bar feeding device 2, and the discharge outlet of the jaw crusher 3 is connected with the impact crusher 4 through the desliming screening classification equipment 5; the jaw crusher 3 is used for primarily treating large massive raw materials, particularly superhard rock raw materials, so that the large massive raw materials are crushed into small-particle-size materials at one stage, and are subjected to circulating crushing through more than two impact crushers 4 arranged in parallel after being subjected to primary desliming and screening, the processing capacity is high, and the materials with good particle types can be obtained.
Specifically, the discharge hole of the jaw crusher 3 is connected to the feed hole of the vibrating screen, and the super-particle-diameter material outlet at the side part of the vibrating screen is circularly connected to the feed hole of the impact crusher 4 through an operating belt; a discharge port of the impact crusher 4 is circularly connected to the vibrating screen, and a large-particle-size material outlet at the front end of the vibrating screen is circularly connected to the impact crusher 4, so that multi-stage circular crushing, screening and multi-stage desliming are realized; a small-particle-size material outlet at the front end of the vibrating screen is connected with the transfer bin 8 through an operating belt, and a fine material outlet at the bottom of the vibrating screen is connected with a common sand bin 23 and can also enter the transfer bin 8; a discharge port of the transfer bin 8 is connected with a fine coarse and fine aggregate processing system 9; the fine material outlet at the bottom of the bar feeding device 2 is connected with a desliming screen 6, the large-particle material outlet at the side part of the desliming screen 6 is connected to the feed inlet of the impact crusher 4 through an operating belt, and the mud outlet at the bottom of the desliming screen 6 is connected to a waste bin 7.
Referring to fig. 3 and 4, the mix and pre-crushing apparatus may also be a jaw crusher 3, a cone crusher 22 and an impact crusher 4 which are arranged in series in sequence; the number of stages of the vibrating screen is matched and set into a first-stage vibrating screen 501, a second-stage vibrating screen 502 and a third-stage vibrating screen 503 according to corresponding mixed pre-crushing equipment; the feed inlet of the jaw crusher 3 is connected with the bar feeding device 2, the discharge outlet of the jaw crusher 3 is connected to the cone crusher 22 through a first-stage vibrating screen 501, and the jaw crusher 3 and the first-stage vibrating screen 501 are used for processing large massive raw materials, particularly performing first-stage crushing, screening and desliming on superhard rock raw materials; the discharge port of the cone crusher 22 is connected to the impact crusher 4 through a secondary vibrating screen 502, and the cone crusher 22 and the secondary vibrating screen 502 are used for realizing secondary crushing, screening and desliming; and a discharge port of the impact crusher 4 is circularly connected to the three-stage vibrating screen 503 to realize multi-stage circular crushing, screening and multi-stage desliming.
Specifically, a fine material outlet at the bottom of the bar feeding device 2 is connected with a desliming screen 6, a large particle material outlet at the side of the desliming screen 6 is connected to a feed inlet of a cone crusher 22 through an operating belt, a mud material outlet at the bottom of the desliming screen 6 is connected to a waste bin 7, a large particle material outlet at the side of a primary vibrating screen 501 is connected with the cone crusher 22 through an operating belt, a fine material outlet at the bottom of the primary vibrating screen 501 is connected with a common sand bin 23 and can also enter a transfer bin 8; the large-particle-size material outlets of the second-stage vibrating screen 502 and the third-stage vibrating screen 503 are circularly connected to the impact crusher 4, the small-particle-size material outlet is connected with a transfer bin 8 through an operating belt, and a discharge port of the transfer bin 8 is connected with a fine-quality coarse-fine aggregate processing system 9.
The fine aggregate coarse and fine processing system 9 is a double-speed double-frequency crushing and sand making device, the double-speed double-frequency crushing and sand making device can be a normal-speed vertical shaft crusher and a high-frequency vertical shaft crusher, a feed inlet of the normal-speed vertical shaft crusher is connected with a transfer bin, a discharge outlet of the double-speed double-frequency crushing and sand making device is connected with a primary powder concentrator 10, and a discharge outlet of the primary powder concentrator 10 is connected with a finished product screening and proportional control circulating processing system; the finished product screening and proportion adjusting circular processing system is used for screening the super-grain-size materials, the fine crushed stones, the fine rice stones and the fine sand, adjusting the discharging proportion of the finished product sand and realizing the adjustment of the fineness modulus of the finished product sand; the ultra-particle-diameter material discharge port of the finished product screening and proportion adjusting circulating processing system is circularly connected to a normal-speed vertical shaft breaking feed port, fine crushed stone and fine rice stone discharge ports are connected to corresponding storage bins 16, meanwhile, fine crushed stone is circularly connected to the normal-speed vertical shaft breaking feed port, fine rice stone is circularly connected to a high-frequency vertical shaft breaking feed port, multi-stage powder selecting equipment 15 is arranged below the fine sand discharge port, and fine sand with various stone powder contents can be manufactured by adopting the multi-stage powder selecting equipment 15.
And material buffer bins 13 are arranged above the feed inlet of the double-speed double-frequency crushing sand making equipment 9 and below the fine sand discharge outlet and used for buffering materials, so that the continuity and stability of sand making are ensured.
Referring to fig. 1 and 3, the finished product screening and proportion adjusting circulating processing system comprises finished product screening and grading equipment and material distributing equipment 12 connected with the finished product screening and grading equipment; the material distributing equipment 12 is a plurality of material distributors which are correspondingly connected with the discharge ports of the finished product screening and grading equipment one by one, and the material distributors are electro-hydraulic material distributors or three-way adjusting devices arranged on discharge shuttle grooves of the finished product screening and grading equipment; the finished product screening and grading equipment can be an elliptical vibrating screen 11 arranged in multiple layers; the material distribution equipment 12 comprises a plurality of electro-hydraulic material distributors which are connected with the discharge ports of the elliptical vibrating screen 11 in a one-to-one correspondence manner; the elliptical vibrating screen 11 can be arranged in more than 4 layers, and sequentially comprises an ultra-grain-diameter material layer with the grain diameter larger than 30mm, a fine gravel layer with the grain diameter of 15-30mm, a fine millstone layer with the grain diameter of 5-15mm and a fine sand layer with the grain diameter of 5-3mm from top to bottom, corresponding outlets for the ultra-grain-diameter material, the fine gravel, the fine rice stones and the fine sand are arranged at the side part of the elliptical vibrating screen 11, and an outlet for the fine sand with the grain diameter smaller than 3mm is arranged at the bottom part; the electro-hydraulic distributor comprises a first distributor, a second separator and a third distributor which are correspondingly connected with outlets of fine crushed stones, fine rice stones and fine sands of the elliptical vibrating screen 11, one discharge port of the first distributor is connected with a corresponding fine crushed stone bin 1601, and the other discharge port of the first distributor is connected to a constant-speed vertical shaft broken feed port through a material buffer bin 13; one discharge port of the second separator is connected with a corresponding fine rice-stone bin 1602, and the other discharge port and the third distributor are connected with a high-frequency vertical shaft breaking feed port; a multistage powder selecting device 15 is arranged below the refined sand outlet of the elliptical vibrating screen 11, specifically, the multistage powder selecting device 15 comprises a fourth distributor 1501 arranged below the refined sand outlet of the elliptical vibrating screen 11, one discharge port of the fourth distributor 1501 is connected with a corresponding low stone powder refined sand bin 1604 through a second-stage powder selecting machine 1502, and the other discharge port is connected with a high stone powder refined sand bin 1603;
referring to fig. 2 and 4, the finished product screening and proportion adjusting circular processing system comprises finished product screening and grading equipment, a finished product sand fineness modulus adjusting and controlling device connected with the finished product screening and proportion adjusting circular processing equipment, and a fineness modulus detection and control device 19 connected with the finished product sand fineness modulus adjusting and controlling device; the finished product screening and grading equipment can also be an adjusting sieve 18, more than two adjusting sieves 18 are arranged in parallel, and a three-way adjusting device is arranged on each discharge shuttle groove of the adjusting sieve 18; the adjusting screen 18 is arranged in a multi-layer mode, a super-grain material layer and a fine crushed stone layer are arranged on the side portion of the adjusting screen from top to bottom in sequence, a fine rice stone layer, a fine sand layer and a fine sand outlet are formed in the bottom of the adjusting screen, the discharging proportion of the three-way adjusting device can be adjusted, and metering belt scales which correspond to one another are arranged below each discharging port of the adjusting screen 18; the finished product screening and grading equipment screens and grades the fine sand-stone aggregate mixture into super-grain-size materials, fine crushed stones, fine rice stones, fine sand and fine sand, the super-grain-size materials, the fine crushed stones, the fine rice stones, the fine sand and the fine sand are respectively metered by the metering belt weighers, the weight proportion is preset on a computer, and according to the preset proportion, the conveying speed of the metering belt weigher is automatically adjusted and adjusted by a system, so that the relative proportion of the materials with different specifications can be kept unchanged under different yields, and the finished product sand with different fineness modulus can be obtained. Specifically, the finished sand fineness modulus regulating and controlling device (application number: 201810147376.3) is a plurality of metering belt weighers which are correspondingly connected with discharge ports of finished product screening and grading equipment one by one; the fineness modulus detection control device (application number: 201810867604.4) is used for detecting and monitoring the fineness modulus of the finished sand at the discharge port of the fineness modulus regulating and controlling device in real time, storing the detection data into the PLC control system and regulating and controlling the fineness modulus regulating and controlling device through the PLC control system, so that the stability of the fineness modulus regulating and controlling device is ensured, the flexibility is high, the fineness modulus of the finished sand is monitored and controlled in real time, the regulation and control precision is high, the stability of the fineness modulus of the finished sand is ensured, and the quality stability of the product is further improved.
Referring to fig. 5, the dust collecting system 14 is configured to collect dust at dust removing points of the above devices, and a dust collecting bin 20 is disposed at a dust discharge port of the dust collecting system 14; the stone dust fine machining system 17 comprises a flour mill 1701, wherein a feeding hole of the flour mill 1701 is connected with the aggregate bin 20 through a feeding device 21, an air blower 1704 and an air blowing pipeline thereof are arranged on one side of the flour mill 1701, a classifier 1702 and a cyclone collector 1703 are sequentially connected above the flour mill 1701 through the air blowing pipeline, and a discharge hole of the cyclone collector 1703 is connected to a finished stone dust bin 1708 through a conveyor 1706 and a lifting machine 1707.
The flour mill 1701 is a longitudinal pendulum flour mill, can prepare the stone powder with the grain size of less than 0.044mm, has strong processing capacity, wide application range, high efficiency and energy conservation; the feeding device 21 is a tubular spiral constant feeder or a metering operation belt conveyor, so that quantitative, uniform, continuous and stable feeding is realized, and stable yield and fineness are ensured; the blower 1704 and the cyclone collector 1703 are both arranged in a variable-frequency mode, flexible regulation and control can be achieved, and stone powder processing efficiency and processing quality are guaranteed.
Be equipped with dispenser 1709 in the milling machine 1701, the dispenser 1709 is used for scattering dust particle and falls into milling machine 1701 after even again, is convenient for dust particle's grinding operation more.
The blast pipe of the blast fan 1704 is connected to a pulse dust collector 1705 through a residual pipe.
The dust collecting system 14 collects dust at dust removing points of the devices of the crushing production line into a collecting bin 20, then the dust is quantitatively sent into a flour mill 1701 through a feeding device 21, and the dust is scattered uniformly through a disperser 1709 and then ground; the ground powder is blown to a classifier 1702 above a flour mill 1701 by the airflow of an air blower 1704 for screening, the stone powder with the particle size of less than 0.044mm flows into a cyclone collector 1703 along with the wind, and is sent to a finished stone powder bin 1708 by a conveyor 1706 and a lifter 1707, and the rest coarse materials fall into the flour mill 1701 for regrinding; meanwhile, the blast pipe generates dust and the leakage gas is sent to the pulse dust collector 1705 through the residual pipe; the purified air flow flows into the blower 1704 through the blast pipe to form a circulation air path, so that the fine stone powder can be continuously and stably manufactured.
A production method based on the crushing production line specifically comprises the following steps:
s1, performing material pretreatment by adopting two-stage or more than two-stage mixed pre-crushing equipment and multi-stage arranged screening and grading equipment 5;
s2, circularly preparing a fine sand aggregate mixture by adopting the fine coarse and fine aggregate processing system 9 and the finished product screening and proportion adjusting circular processing system, screening and grading the fine sand aggregate mixture, and preparing fine sand and aggregate with different specifications according to the proportion;
s3, performing multi-stage powder selection on the refined sand to prepare various refined sands with different stone powder contents;
and s4, conveying the dust collected by the dust removal equipment to a stone powder finishing system to prepare finished stone powder.
In step s1, after primary extrusion crushing and primary desliming are carried out on the raw material, more than two stages of impact crushing and desliming are circularly carried out; or after the primary extrusion type crushing and the primary desliming are carried out on the raw materials, the secondary extrusion type crushing and the secondary desliming are carried out, and the impact type crushing and the tertiary desliming are carried out more than three levels in a recycling mode. Specifically, for large massive superhard rock, firstly, one-stage or two-stage crushing and desliming are carried out through an extrusion crushing process to prepare a medium-crushed raw material, and then, cyclic crushing and desliming are carried out through impact crushing to obtain a material with low mud content and good grain type.
In steps s2 and s3, the pretreated material is sent into a double-speed double-frequency crushing sand making device 7, and a mixture of fine sand, fine crushed stone and fine rice and stone is made by combining normal-speed vertical shaft crushing and high-speed high-frequency vertical shaft crushing; pre-selecting the mixture of the fine sand, the fine broken stone and the fine rice stone by a first-stage powder selecting machine; then a finished product screening and proportion adjusting circulating processing system is adopted to screen the mixture, and finished product sand discharging proportion is adjusted, so that the material with the super grain diameter enters a high-speed high-frequency vertical shaft again for crushing; sieving the small-particle-size materials respectively to prepare fine sand, fine broken stone and fine rice stone with different fineness modulus; finally, performing more than two-stage powder selection on the fine sand to prepare fine sand with various different stone powder contents;
in the process of executing the steps s1 to s3, collecting dust of each dust removing point of the whole crushing production line by using the dust removing device 14, wherein the dust is a coarse and fine material mixture; in step s4, the dust is metered into the mill for fine grinding by the feeding device; and then wind power selection is carried out through a classifier, stone powder with the particle size of below 0.044mm is collected, and meanwhile, the rest super-particle dust circularly enters a grinding mill for fine grinding.

Claims (10)

1. The utility model provides a broken production line based on high-quality grit aggregate of hard rock processing, includes raw materials storehouse (1) and bar batcher (2) of being connected with it, its characterized in that: a discharge port at the front end of the bar feeder (2) is provided with two-stage or more than two-stage mixing pre-crushing equipment, and a desliming screening classification equipment (6) is arranged at a fine material outlet below; the discharge port of the mixing and pre-crushing equipment is connected with multi-stage screening and grading equipment (5), the discharge port at the bottom of the screening and grading equipment (5) is connected to a common sand bin (23) and/or a transfer bin (8), and the discharge port at the front end is circularly connected to the mixing and pre-crushing equipment and/or the transfer bin (8); a discharge port of the transfer bin 8 is connected with a sandstone aggregate finish machining system; the discharge hole of the sand and stone aggregate finish machining system is connected with a multi-stage powder selecting device (15) and/or connected to a corresponding stock bin (16);
the dust removing points of the equipment are connected with a dust collecting system (14) through a dust removing pipeline, and a discharge port of the dust collecting system (14) is connected with a stone dust fine machining system (17);
the devices are all connected with a PLC control system for controlling mutual cooperation of the devices.
2. The hard rock-based high quality sandstone aggregate crushing production line of claim 1, wherein: the mixed pre-crushing equipment comprises a jaw crusher (3) and impact crushers (4) connected in series with the jaw crusher, and at least two impact crushers (4) are arranged in parallel; the feed inlet of the jaw crusher (3) is connected with the bar feeder (2), and the discharge outlet is connected with the feed inlet of the impact crusher (4) through a screening and grading device (5); the discharge port of the impact crusher (4) is circularly connected to the screening and grading equipment (5) and/or the transit bunker (8).
3. The hard rock-based high quality sandstone aggregate crushing production line of claim 1, wherein: the number of stages of the screening and grading equipment (5) is matched with that of the mixing and pre-crushing equipment; the mixed pre-crushing equipment comprises a jaw crusher (3), a cone crusher (22) and an impact crusher (4) which are sequentially connected in series, wherein a feed inlet of the jaw crusher (3) is connected with the bar feeder (2), and a discharge outlet is connected to the cone crusher (22) through primary screening and grading equipment (501); the discharge hole of the cone crusher (22) is connected to the impact crusher (4) through a secondary screening and grading device (502); the discharge hole of the impact crusher (4) is circularly connected to the three-stage screening and grading equipment (5) and/or the transfer bin (8).
4. The hard rock-based high quality sandstone aggregate crushing production line of claim 1, wherein: fine machining system of mountain flour (17) includes milling machine (1701), the feed inlet of milling machine (1701) pass through feed arrangement (21) with dust collecting system (14) are connected, are equipped with air-blower (1704) and blast pipe thereof in milling machine (1701) one side, milling machine (1701) top has connected gradually grader (1702) and cyclone collector (1703) through the blast pipe, the discharge gate of cyclone collector (1703) is connected to mountain flour finished product storehouse (1708).
5. The hard rock-based high quality sandstone aggregate crushing production line of claim 4, wherein: the flour mill (1701) is a longitudinal pendulum type flour mill; the feeding device (21) is a tubular spiral constant feeder or a metering running belt; the blower (1704) and the cyclone collector (1703) are arranged in a variable-frequency mode.
6. The hard rock-based high quality sandstone aggregate crushing production line of claim 4, wherein: a dispersion machine (1709) is arranged in the mill (1701); and a blast pipeline of the blast fan (1704) is connected with a pulse dust collector (1705) through a residual pipe.
7. A crushing production method for processing high-quality sandstone aggregate based on hard rock is characterized by comprising the following steps:
s1, performing material pretreatment by adopting two-stage or more than two-stage mixed pre-crushing equipment and screening and grading equipment (5);
s2, adopting a fine sand aggregate processing system (9) and a finished product screening and proportion adjusting circulating processing system to circularly prepare fine sand aggregate mixture, screening and grading the fine sand aggregate mixture, and preparing fine sand and aggregate with different specifications according to proportion;
s3, performing multi-stage powder selection on the refined sand to prepare various refined sands with different stone powder contents;
and s4, conveying the dust collected by the dust removal equipment to a stone powder finishing system to prepare finished stone powder.
8. The method for producing high-quality sandstone aggregate based on hard rock processing according to claim 6, wherein the method comprises the following steps: in step s1, performing primary extrusion crushing and primary desliming on the raw materials, and then circularly performing more than two-stage impact crushing and desliming;
or after the primary extrusion type crushing and the primary desliming are carried out on the raw materials, the secondary extrusion type crushing and the secondary desliming are carried out, and the impact type crushing and the tertiary desliming are carried out more than three levels in a recycling mode.
9. The method for producing high-quality sandstone aggregate based on hard rock processing according to claim 6, wherein the method comprises the following steps: in the steps s2 and s3, a double-speed double-frequency crushing sand making process is adopted to make the pretreated material into a fine sand aggregate mixture, after the mixture is subjected to pre-selection of powder, the mixture material is screened and made into aggregates and fine sand with different fineness modulus according to a proportion, and multi-stage powder selection corresponding to the fine sand is carried out to make the fine sand with different stone powder contents.
10. The method for producing high-quality sandstone aggregate based on hard rock processing according to claim 6, wherein the method comprises the following steps: in step s4, the dust is quantitatively fed into the mill 1701 through the feeding device 21 for fine grinding; then the powder is selected by wind power through a classifier (1702), the stone powder with the grain diameter of less than 0.044mm is collected, and the rest super-grain dust is circulated into a grinding mill (1701) for fine grinding.
CN201911135707.2A 2019-11-19 2019-11-19 Crushing production line and method for processing high-quality sandstone aggregate based on hard rock Pending CN110681475A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111632727A (en) * 2020-05-25 2020-09-08 郑州水工机械有限公司 Sandstone co-production line suitable for fine product molding
CN112221679A (en) * 2020-09-15 2021-01-15 福建省铁拓机械股份有限公司 Environment-friendly modularization aggregate plastic classification equipment
CN112676026A (en) * 2020-12-22 2021-04-20 中国水利水电第九工程局有限公司 Dry-breaking wet-screening sand making process
CN112892814A (en) * 2020-12-24 2021-06-04 中国水利水电第九工程局有限公司 Pneumatic powder removing process in manual sand making process
CN113351338A (en) * 2021-06-22 2021-09-07 韶关市强龙重工有限公司 Intelligent environment-friendly dry-method building-type sand making system and processing technology
CN113413996A (en) * 2021-06-28 2021-09-21 中国水利水电第九工程局有限公司 Sand processing plant vertical shaft crusher sand wet method quantitative powder removal regulation and control method
CN113681725A (en) * 2021-08-02 2021-11-23 中国三峡建工(集团)有限公司 TBM (tunnel boring machine) rear-break movable sandstone mixing and lining complete system and method
WO2022021960A1 (en) * 2020-07-28 2022-02-03 贵州成智重工科技有限公司 6s processing process and production line of coarse and fine meso- and microaggregates for concrete
CN114405644A (en) * 2022-01-21 2022-04-29 上海山美环保装备股份有限公司 Dry aggregate pre-sorting system and floor type sand making process system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111632727A (en) * 2020-05-25 2020-09-08 郑州水工机械有限公司 Sandstone co-production line suitable for fine product molding
WO2022021960A1 (en) * 2020-07-28 2022-02-03 贵州成智重工科技有限公司 6s processing process and production line of coarse and fine meso- and microaggregates for concrete
CN112221679A (en) * 2020-09-15 2021-01-15 福建省铁拓机械股份有限公司 Environment-friendly modularization aggregate plastic classification equipment
CN112676026A (en) * 2020-12-22 2021-04-20 中国水利水电第九工程局有限公司 Dry-breaking wet-screening sand making process
CN112892814A (en) * 2020-12-24 2021-06-04 中国水利水电第九工程局有限公司 Pneumatic powder removing process in manual sand making process
CN113351338A (en) * 2021-06-22 2021-09-07 韶关市强龙重工有限公司 Intelligent environment-friendly dry-method building-type sand making system and processing technology
CN113413996A (en) * 2021-06-28 2021-09-21 中国水利水电第九工程局有限公司 Sand processing plant vertical shaft crusher sand wet method quantitative powder removal regulation and control method
CN113681725A (en) * 2021-08-02 2021-11-23 中国三峡建工(集团)有限公司 TBM (tunnel boring machine) rear-break movable sandstone mixing and lining complete system and method
CN114405644A (en) * 2022-01-21 2022-04-29 上海山美环保装备股份有限公司 Dry aggregate pre-sorting system and floor type sand making process system

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