CN111841849A - Thick-medium-fine micro aggregate 6S processing technology for concrete and production line - Google Patents
Thick-medium-fine micro aggregate 6S processing technology for concrete and production line Download PDFInfo
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- CN111841849A CN111841849A CN202010739113.9A CN202010739113A CN111841849A CN 111841849 A CN111841849 A CN 111841849A CN 202010739113 A CN202010739113 A CN 202010739113A CN 111841849 A CN111841849 A CN 111841849A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C21/00—Disintegrating plant with or without drying of the material
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- 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
- B02C23/02—Feeding devices
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- 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
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
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- 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
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/0076—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials characterised by the grain distribution
- C04B20/008—Micro- or nanosized fillers, e.g. micronised fillers with particle size smaller than that of the hydraulic binder
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
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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
- C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
- C04B20/02—Treatment
- C04B20/026—Comminuting, e.g. by grinding or breaking; Defibrillating fibres other than asbestos
Abstract
The invention discloses a 6S processing technology and a production line of coarse and fine medium micro-aggregates for concrete, which carry out pretreatment through materials; circulating multi-stage coarse crushing and multi-stage desliming; circulating multi-stage fine crushing and multi-stage powder selection, and preparing fine sand and aggregate with different specifications and different stone powder contents according to a proportion; meanwhile, the recycled dust materials are crushed and processed, and classified and collected by multistage air separation. The invention perfects the whole sand production line, not only can effectively improve the system productivity and the quality of finished sand aggregate, realize various grading and optimal grading of the finished sand aggregate, but also can effectively recycle the recycled dust waste, has strong processing capacity, can accurately control the grading of the stone powder, can prepare the stone powder with various specifications, and is used for effectively improving the durability and mechanical property of concrete, and has low production cost, high efficiency and energy conservation.
Description
Technical Field
The invention relates to a 6S processing technology and a production line of coarse and fine medium micro aggregate for concrete, belonging to the technical field of sand making processing equipment and production technology.
Background
The sandstone aggregate is a basic raw material accounting for the largest proportion (75-85%) in concrete and is a physical filling basic particle of the concrete, and the filler of the conventional concrete is divided into gravel, rice stone, sand, stone powder, cement, mineral powder and fly ash. The industry standard defines the particles with the particle size less than or equal to 0.075mm as the stone powder. According to the scientific formula requirement of high-performance concrete, the fillers of the coarse and fine medium and micro aggregates of the concrete are divided into hundreds, thousands and ten thousand grades, and experiments prove that the scientificity of the division is favorable for improving the density of the concrete, so that the mechanical property and the durability of the concrete are improved.
At present, in the machine-made sand-stone concrete industry, no process and equipment for deep processing of fine aggregates according to a scientific formula of high-performance concrete exist, and the stone powder is still used as a waste resource to be reused and added into the concrete. The grinding processing technology is used as a stone powder deep processing technology by some enterprises, and the following defects exist:
(1) the lack of research on the fine gradation of the stone powder does not lead to the development of a deep processing system of the ultrafine micro aggregate according to the formulation requirements of concrete science, thereby limiting the development of the concrete industry.
(2) The existing equipment in the grinding industry has low treatment capacity and high energy consumption, can only singly control the granularity of products, and the products lack diversification.
(3) The grading of the existing stone powder is not controllable, and the stone powder is reused as waste, so that the filling value of the stone powder cannot be truly exerted.
(4) In the five-double full dry crushing production line and the processing method for the high-quality sandstone aggregate disclosed by the application number 2019101516208, the finished sandstone aggregate can be efficiently produced, the high efficiency and the good quality of the finished sandstone aggregate are ensured, and the prepared finished sandstone aggregate has the characteristics of excellent grading, multiple grading and the like, but the processing technology of stone powder is not involved; the application number 2019111357072 discloses a broken production line and a method for processing high-quality sandstone aggregate based on hard rock, which further improve the production of sandstone aggregate, can efficiently process hard rock materials, and increases a stone powder processing technology, but the broken production line and the method adopt the existing grinding equipment for processing, have single processing, high energy consumption, single control of granularity and higher cost.
Disclosure of Invention
In view of the above, the invention aims to provide a process and a production line for processing coarse and fine medium micro-aggregates 6S for concrete, which can overcome the defects of the prior art.
The purpose of the invention is realized by the following technical scheme:
A6S processing technology of coarse and fine medium micro aggregate for concrete is characterized by comprising the following steps:
s1, pretreating the materials, vibrating and dispersing the materials, primarily desliming the materials, and quantitatively feeding the materials;
s2, performing coarse crushing on the materials, performing circular crushing on the materials, and performing multistage desliming;
s3, finely crushing the materials, circularly crushing the materials in multiple stages, screening and grading, and preparing fine sand and aggregate with different specifications according to the proportion;
s4, performing multi-stage powder selection on the refined sand to prepare various refined sands with different stone powder contents;
s5, deep processing the dust material and the fine aggregate,
recovering the dust materials and the fine aggregates generated in the steps, and performing multi-stage impact crushing on the dust materials and the fine aggregates;
and s6, performing air separation and classification, and performing classified collection to prepare the multi-graded medium and micro aggregate.
In the steps 1 and s2, the materials are sent to a feeding device for vibration dispersion, primary desliming is carried out by combining a desliming and screening device, then coarse crushing is carried out by adopting a coarse crushing device, screening and desliming are carried out by combining a desliming device, and the screened materials are classified according to particle size; and (5) entering the next production link, or circularly entering crushing equipment for circular crushing.
In the step s3, double-speed double-frequency impact shaping is carried out on the coarsely crushed material by adopting a double-host variable frequency control technology, and sand of the sand-aggregate mixture is prepared; screening and grading the sand-stone aggregate mixture to circularly process the super-grain-size materials, and storing the qualified materials in a finished product bin; meanwhile, finished product proportion is adjusted according to the proportion of the material adjusting system to prepare finished product sandstone aggregates with different fineness modulus.
In the step s5, according to the characteristics of the dust material and the fine aggregate, applying high-speed impact energy to the dust material and the fine aggregate, wherein the high-speed impact energy is greater than the energy for disintegrating the material, so as to realize supercritical dissociation of the dust material and the fine aggregate;
in the steps s5 and s6, ternary flow is adopted to realize high-speed rotation, and the dust material and the fine aggregate are thrown onto a wear-resistant anvil to be subjected to supercritical impact crushing; and dust removal and multi-stage separation are carried out by combining separation equipment, and medium-micro aggregates with different particle sizes are collected or are circularly crushed.
A concrete coarse and fine medium micro aggregate 6S production line comprises a primary desliming device, wherein a material pretreatment device is arranged below a discharge port of the primary desliming device, the material pretreatment device is connected with a fine product coarse and fine aggregate processing device, the fine product coarse and fine aggregate processing device is connected with a multi-stage powder selecting device, dust removing points of the devices are connected with a dust extracting system through dust removing pipelines, the dust extracting system is connected with a superfine micro aggregate processing device, the superfine micro aggregate processing device comprises a high-pressure three-dimensional flow superfine crushing device and a sorting device connected with the high-pressure three-dimensional flow superfine crushing device, a dust outlet of the sorting device is circularly connected to the dust extracting system, and the discharge port is connected to a corresponding micro aggregate bin or is circularly connected to the high-pressure three-dimensional flow superfine crushing device;
the devices are all connected with a PLC control system for controlling mutual cooperation of the devices.
The material pretreatment equipment comprises coarse crushing equipment, wherein the discharge end of the coarse crushing equipment is connected with first screening and grading equipment which is arranged in a multi-stage mode, and the discharge hole of the first screening and grading equipment is circularly connected to the coarse crushing equipment or connected with fine aggregate processing equipment; the coarse crushing equipment can be a coarse crushing counterattack and a middle crushing counterattack arranged in series with the coarse crushing counterattack;
or the coarse crushing equipment is a jaw crusher and a reaction crusher connected in series with the jaw crusher;
or the coarse crushing equipment comprises a jaw crusher, a cone crusher and a counterattack crusher which are sequentially connected in series.
The fine coarse and fine aggregate processing equipment comprises double-speed double-frequency crushing sand making equipment and a finished product screening and proportion adjusting circulating system connected with the double-speed double-frequency crushing sand making equipment, wherein a super-particle-size material discharge port of the finished product screening and proportion adjusting circulating system is circularly connected to the double-speed double-frequency crushing sand making equipment, and a finished product sandstone aggregate discharge port is connected to a corresponding sandstone aggregate bin or is circularly connected to the double-speed double-frequency crushing sand making equipment.
The high-pressure three-dimensional flow ultrafine grinding equipment is connected with sorting equipment which is arranged in a multistage series connection mode, and the high-pressure three-dimensional flow ultrafine grinding equipment is vertical shaft type high-pressure three-dimensional flow ultrafine grinding equipment or horizontal three-dimensional flow ultrafine grinding equipment.
The vertical shaft type high-pressure three-dimensional flow ultrafine grinding equipment comprises a support, wherein a cylinder is arranged on the support, a feed inlet at the top of the cylinder is connected to a buffer bin, and a discharge outlet at the bottom of the cylinder is connected with sorting equipment; a plurality of layers of three-dimensional flow crushing mechanisms are arranged in the barrel from top to bottom, and the bottoms of adjacent three-dimensional flow crushing mechanisms are connected through a first negative pressure material channel;
the horizontal high-pressure three-dimensional flow ultrafine crushing equipment comprises a mounting frame, wherein multiple stages of three-dimensional flow crushing devices arranged in parallel are fixedly connected to the mounting frame, a second negative pressure material channel communicated with each other is arranged between every two adjacent three-dimensional flow crushing devices, a feed inlet of the first-stage three-dimensional flow crushing device is connected to a buffer bin, and a bottom discharge port is connected with sorting equipment.
Compared with the prior art, the whole production process of the coarse-fine medium micro-aggregate 6S for the concrete comprises the steps of primary desliming of materials, coarse crushing of the materials, double-speed double-frequency impact shaping of the coarsely crushed materials by adopting a double-host variable frequency control technology, preparation of a sand-stone aggregate mixture, screening of the sand-stone aggregate mixture, grading according to proportion, multi-stage powder selection and multi-stage impact crushing of dust materials and fine aggregates. Based on the processing technology, the invention also discloses a 6S production line of coarse and fine medium micro-aggregates for concrete, which reasonably utilizes the matching processing of coarse crushing equipment, double-speed double-frequency crushing sand making equipment, high-pressure three-dimensional flow ultra-fine crushing equipment and other equipment to realize high-efficiency and stable sand making production, and simultaneously crushes and processes dust materials and fine aggregates generated by the whole production line to prepare micron-grade, submicron-grade and sub-nanometer-grade aggregate finished products.
The invention has the beneficial effects that:
(1) the invention improves the existing sand making production process, can prepare high-quality sandstone aggregate with high efficiency and low cost, can recover dust materials and fine aggregates generated in the whole sand making production process, and can carry out crushing and deep processing on the dust materials and the fine aggregates to realize integrated, sequential and intelligent processing.
(2) The whole line is reasonable in matching, low in use cost and input cost and high in production efficiency, the prepared sandstone aggregate is reasonable in grading, the fineness modulus precision is high, the preparation requirements of various concretes on high strength and low cost are met, and the energy-saving and environment-friendly effects are achieved.
(3) The dust material and the fine aggregate are deeply processed by adopting a crushing process and corresponding crushing equipment, the equipment structure is simple, the operation convenience is high, the use cost and the maintenance cost are low, the treatment capacity is strong, and the treatment is efficient and stable.
(4) The dust materials and the fine aggregates can be efficiently recycled, the prepared medium-micro aggregates can be put into concrete or other fields for use, the concrete is improved into high-performance concrete or ultra-high-performance concrete, and meanwhile, the production cost of the concrete is low, so that the wide popularization and application are realized.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail with reference to the accompanying drawings, in which:
fig. 1 is a schematic structural flow diagram (embodiment one) of the present invention.
Fig. 2 is a schematic structural flow diagram (embodiment two) of the present invention.
FIG. 3 is a schematic structural diagram of a vertical shaft type high pressure three-dimensional flow ultrafine grinding apparatus (embodiment one).
FIG. 4 is a schematic view showing the structure of a vertical shaft type high pressure three-dimensional flow ultrafine pulverizing apparatus (embodiment II).
FIG. 5 is a schematic view of the cross-sectional structure A-A of FIG. 3
FIG. 6 is a schematic view showing the structure of a horizontal type three-dimensional flow ultrafine pulverizing apparatus.
Fig. 7 is a schematic structural view of a section B-B in fig. 6.
Detailed Description
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the preferred embodiments are illustrative of the invention only and are not limiting upon the scope of the invention.
As shown in figures 1-7 of the drawings,
A6S processing technology of coarse and fine medium micro aggregate for concrete comprises the following steps:
s1, pretreating the materials, vibrating and dispersing the materials, primarily desliming the materials, and quantitatively feeding the materials;
s2, performing coarse crushing on the materials, performing circular crushing on the materials, and performing multistage desliming;
s3, finely crushing the materials, circularly crushing the materials in multiple stages, screening and grading, and preparing fine sand and aggregate with different specifications according to the proportion;
s4, performing multi-stage powder selection on the refined sand to prepare various refined sands with different stone powder contents;
s5, deep processing the dust material and the fine aggregate,
recovering the dust materials and the fine aggregates generated in the steps, and performing multi-stage impact crushing on the dust materials and the fine aggregates;
and s6, performing air separation and classification, and performing classified collection to prepare the multi-graded medium and micro aggregate.
In step s1, the material is sent to a feeding device for vibration dispersion and combined with a desliming screening device for primary desliming.
In step s2, crushing by adopting coarse crushing equipment, screening and desliming by combining desliming equipment, and grading the screened materials according to particle size; and (5) entering the next production link, or circularly entering crushing equipment for circular crushing.
In step s3, double-speed double-frequency impact shaping is carried out on the coarsely crushed material by adopting a double-host variable frequency control technology, and sand of the sand-aggregate mixture is prepared; and screening and grading the sand-stone aggregate mixture to circularly process the super-grain-size materials, and storing the qualified materials in a finished product bin. Meanwhile, finished product proportion can be adjusted according to the material adjusting system in proportion to prepare finished product sandstone aggregates with different fineness modulus.
In step s5, according to the self characteristics of the dust material and the fine aggregate, applying high-speed impact energy to the dust material and the fine aggregate, wherein the high-speed impact energy is larger than the energy for material disintegration, and realizing supercritical dissociation of the dust material and the fine aggregate;
specifically, ternary flow is adopted to realize high-speed rotation, and dust materials and fine aggregates are thrown onto a wear-resistant anvil for supercritical impact crushing; and multi-stage separation is carried out by combining with separation equipment, and medium-micro aggregates with different grain diameters are collected or are circularly crushed.
In order to improve the crushing effect of the dust materials and the fine aggregates, a multi-stage crushing process is adopted; specifically, multistage high-pressure three-dimensional flow ultrafine grinding equipment is arranged, adjacent high-pressure three-dimensional flow ultrafine grinding equipment is communicated with each other through a negative pressure material channel, and materials are gradually ground under the action of negative pressure air flow.
In step s6, sorting two or more grades of fine powder particles by adopting multi-stage sorting equipment; meanwhile, the dust removal ports arranged in multiple stages realize dust removal through dust collection system sorting equipment, and the finished product material ports of each stage of sorting equipment are connected to corresponding bins to realize the classified collection of the superfine medium and micro aggregates; specifically, the micron-scale, submicron-scale and sub-nanometer-scale finished products are classified and collected through a sorting device.
A thick-thin medium micro aggregate 6S production line for concrete comprises a primary desliming device 1, wherein a material pretreatment device 2 is arranged below a discharge port of the primary desliming device 1, the material pretreatment device 2 is connected with a fine-thin aggregate processing device 3, the fine-thin aggregate processing device 3 is connected with a multi-stage powder selection device 4, dust removing points of the devices are connected with a dust extraction system 5 through dust removing pipelines, the dust extraction system 5 is connected with a superfine aggregate processing device 6, the superfine aggregate processing device 6 comprises a high-pressure three-dimensional flow superfine crushing device and a separation device 63 connected with the high-pressure three-dimensional flow superfine crushing device, a dust outlet of the separation device 63 is circularly connected to the dust extraction system 5, and the discharge port is connected to a corresponding micro aggregate bin 64 or is circularly connected to the high-pressure three-dimensional flow superfine crushing device;
the devices are all connected with a PLC control system for controlling mutual cooperation of the devices.
The primary desliming equipment 1 is desliming screening equipment 12 connected with a bar feeder 11, and the bar feeder 11 is used for performing vibration dispersion on materials and performing primary desliming by combining the desliming screening equipment 12.
Material preprocessing equipment 2 include with the coarse crushing equipment 21 that desliming screening equipment 12 is connected, the first screening classification equipment 22 of coarse crushing equipment 21 discharge end and multistage setting, the discharge gate circulation of first screening classification equipment 22 is connected to coarse crushing equipment 21, or is connected with fine work thick and thin aggregate processing equipment 3.
The coarse crushing device 21 can be set as a coarse crushing impact crusher 211 and a middle crushing impact crusher 212, two-stage process crushing can be realized, the first screening and grading device 22 can be set as a first multilayer vibrating screen 221 and a second multilayer vibrating screen 222, a bottom fine material opening of the bar feeder 11 is connected with the desliming and screening device 12, a side coarse material opening is connected with a feeding opening of the coarse crushing impact crusher 211, a discharging opening of the coarse crushing impact crusher 211 is connected with the first multilayer vibrating screen 221, and ultra-particle-diameter material outlets at the side parts of the first multilayer vibrating screen 221 and the second multilayer vibrating screen 222 are circularly connected to a feeding opening of the middle crushing impact crusher 212 through an operating belt; the small-particle-size material outlet is connected with a transfer bin 7 through an operation belt, and a discharge port of the transfer bin 7 is connected with fine and coarse aggregate processing equipment 3; a mud outlet at the bottom of the first multilayer vibrating screen 221 is connected with the waste bin 8; the discharge port of the large-particle materials at the side part of the desliming and screening device 12 is connected to the feed port of the medium crushing and impact breaking device 212 through a running belt, and the mud materials at the bottom outlet are conveyed into the waste bin 8.
Alternatively, the coarse crushing apparatus 21 may be a jaw crusher and a reaction crusher arranged in series therewith (see the patent application published under application number 2019111357072 for details); the jaw crusher 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, the small-particle-size materials are sieved by the first sieving and grading equipment 22, and then the small-particle-size materials are circularly crushed by more than two impact crushers arranged in parallel, so that the jaw crusher is high in treatment capacity, and the materials with good particle sizes can be obtained.
Or the coarse crushing equipment 21 can also be a jaw crusher, a cone crusher and a reaction crusher (see the patent application published by the application number: 2019111357072 for details) which are sequentially arranged in series; the grade number of the first screening and grading equipment 22 is matched and set into a first-grade vibrating screen, a second-grade vibrating screen and a third-grade vibrating screen according to the corresponding coarse crushing equipment 21; the discharge port of the jaw crusher is connected to the cone crusher through a primary vibrating screen, and the jaw crusher and the primary vibrating screen are used for processing large massive raw materials, particularly performing primary crushing, screening and desliming on superhard rock raw materials; the discharge port of the cone crusher is connected to the impact crusher through a secondary vibrating screen, and the cone crusher and the secondary vibrating screen are used for realizing secondary crushing, screening and desliming; and a discharge port of the impact crusher is circularly connected to the three-stage vibrating screen, so that multi-stage circular crushing, screening and multi-stage desliming are realized.
The small-particle-size material outlet of the coarse crushing device 21 is connected to the transit bin 7 through the running belt, and the discharge hole of the transit bin 7 is connected with the fine-quality coarse-fine aggregate processing device 3.
The fine coarse and fine aggregate processing equipment 3 comprises double-speed double-frequency crushing sand making equipment 31 and a finished product screening and proportion adjusting circulating system 32 connected with the double-speed double-frequency crushing sand making equipment, wherein a super-particle-size material discharge port of the finished product screening and proportion adjusting circulating system 32 is circularly connected to the double-speed double-frequency crushing sand making equipment 31, and a finished product sandstone aggregate discharge port is connected to a corresponding sandstone aggregate bin 9 or is circularly connected to the double-speed double-frequency crushing sand making equipment 31.
The double-speed double-frequency crushing and sand making equipment 31 can be a normal-speed vertical shaft crusher 311 and a high-frequency vertical shaft crusher 312, a feed inlet of the normal-speed vertical shaft crusher 311 is connected with the transfer bin 7, a discharge outlet of the double-speed double-frequency crushing and sand making equipment 31 is connected with the primary powder concentrator 33 through a hoister, a discharge outlet of the primary powder concentrator 33 is connected with the finished product screening and proportional adjustment circulating system 32, and the primary powder concentrator 33 is used for pre-screening the mixed material prepared by the double-speed double-frequency crushing and sand making equipment 31 and preventing the mixed material entering the finished product screening and proportional adjustment circulating system 32 from blocking a screen mesh; the finished product screening and proportion adjusting circulating system 32 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 super-particle-size material discharge port of the finished product screening and proportion adjusting circulating system is circularly connected to a normal-speed vertical shaft broken 311 feed port, the fine crushed stone and fine rice stone discharge ports are connected to corresponding storage bins, meanwhile, the fine crushed stone is circularly connected to the normal-speed vertical shaft broken 311 feed port, the fine rice stone is circularly connected to a high-frequency vertical shaft broken 312 feed port, multi-stage powder separation equipment is arranged below the fine sand discharge port, and fine sand with different stone powder contents can be manufactured by adopting the multi-stage powder separation equipment.
A material buffer bin 34 is arranged above a feeding hole of the double-speed double-frequency crushing sand making equipment 31 and used for buffering materials, and the continuity and stability of sand making are guaranteed.
Referring to fig. 1, the finished product screening and proportional control circulation system 32 includes a second screening and classifying device and a material distribution device 322 connected thereto, the material distribution device 322 includes a plurality of material distributors connected to the discharge ports of the second screening and classifying device 321 in a one-to-one correspondence manner, and the discharge ports of the material distribution device 322 are provided with a plurality of operating belt conveyors corresponding to one-to-one correspondence manner; the distributor is an electro-hydraulic distributor or a three-way adjusting device arranged on a discharge shuttle groove of the second screening and grading equipment 321; the second screening and classifying device may be an elliptical vibrating screen 321 arranged in multiple layers; the material distributing equipment 322 comprises a plurality of electro-hydraulic material distributors which are connected with the discharge ports of the elliptical vibrating screen 321 in a one-to-one correspondence manner; the elliptical vibrating screen 321 is provided with more than 4 layers, and sequentially comprises an ultra-grain-diameter material layer with the grain diameter larger than 23mm, a fine gravel layer with the grain diameter of 15-23mm, 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 millstone and the fine sand are arranged at the side part of the elliptical vibrating screen 321, and an outlet for the fine sand with the grain diameter smaller than 3mm is arranged at the bottom; 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 321, one discharge port of the first distributor is connected with a corresponding fine crushed stone bin, and the other discharge port of the first distributor is connected to a feed port of the constant-speed vertical shaft crusher 311 through a material buffer bin 34; one discharge port of the second separator is connected with the corresponding fine rice-stone bin, and the other discharge port and the third distributor are connected to the high-frequency vertical shaft crusher 312 feed port; the multi-stage powder selecting device 4 is arranged below a fine sand outlet of the elliptical vibrating screen 321, specifically, the multi-stage powder selecting device 4 comprises a fourth distributor 41 arranged below the fine sand outlet of the elliptical vibrating screen 321, a discharge port of the fourth distributor 41 is connected with a corresponding low stone powder fine sand silo through a second-stage powder selecting machine 42, and another discharge port is connected with a high stone powder fine sand silo.
Or as shown in fig. 2, the finished product sieving and proportion adjusting circulating system 32 includes a second sieving and grading device and a finished product fineness modulus adjusting and controlling device 324 connected thereto; and a fineness modulus detection control device is arranged at a discharge port of the finished sand fineness modulus regulating and controlling device. The second screening equipment can also be an adjusting screen 323, a three-way adjusting device is arranged on each discharging shuttle groove of the adjusting screen 323, a discharging port and a material distributing belt of the three-way adjusting device are arranged, the adjusting screen 323 is arranged in multiple layers, an ultra-grain-diameter material layer and a fine gravel layer are sequentially arranged on the side part from top to bottom, fine gravel layers, fine sand layers and fine sand outlets are arranged at the bottom of the fine sand layers, the three-way adjusting device can adjust the discharging proportion of the three-way adjusting device, the material distributing belts which correspond to one another are arranged below each discharging port of the adjusting screen, the ultra-grain-diameter material is conveyed into a normal-speed vertical shaft to be broken, and fine gravel is conveyed into a normal-speed vertical shaft to be broken or conveyed into; fine rice stones are conveyed into a high-frequency vertical shaft crusher or a corresponding fine rice stone bin; the fine sand is conveyed into a fourth distributor 41, one discharge port of the fourth distributor 41 is connected with a corresponding low stone powder fine sand silo through a second-stage powder concentrator 42, and the other discharge port is connected with a high stone powder fine sand silo; the finished sand fineness modulus regulating device 324 (application number: 201810147376.3) is a plurality of metering belt scales which are correspondingly connected with the discharge ports of the regulating screen 323 one by one, the corresponding metering belt scales convey the material with the super grain diameter into the constant-speed vertical shaft crusher 311, the fine crushed stone into the constant-speed vertical shaft crusher 311, the fine rice stone into the high-frequency vertical shaft crusher 312, or the fine crushed stone, the fine rice stone and the fine sand are mixed by the corresponding metering belt scales to prepare the finished sand with different fineness moduli and convey the finished sand into the corresponding bins; or the refined sand is conveyed into the distributor 13, one discharge port of the distributor 13 is connected with the corresponding low stone powder refined sand bin 19 through the secondary powder concentrator 14, and the other discharge port is connected with the high stone powder refined sand bin 18; 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.
The high-pressure three-dimensional flow ultrafine grinding equipment is connected with a sorting device 63 which is arranged in a multistage series connection mode, and the high-pressure three-dimensional flow ultrafine grinding equipment is vertical shaft type high-pressure three-dimensional flow ultrafine grinding equipment 61 or horizontal three-dimensional flow ultrafine grinding equipment 62.
The vertical shaft type high-pressure three-dimensional flow ultrafine grinding equipment 61 comprises a support 611, a cylinder body 612 is arranged on the support 611, a feeding hole in the top of the cylinder body 612 is connected to a buffer bin 65, and a discharging hole in the bottom is connected with sorting equipment 63; the barrel 612 is provided with a plurality of layers of three-dimensional flow crushing mechanisms 613 from top to bottom, and the bottoms of the adjacent three-dimensional flow crushing mechanisms 613 are connected through a first negative pressure material channel 614. The three-dimensional flow crushing mechanism 613 comprises a main shaft assembly 6131 arranged at the axis of the cylinder 612, and the main shaft assembly 6131 is connected with a first driving device 6132 arranged outside the cylinder 612; two or more layers of three-dimensional flow impeller rotor bodies 1.1 are sequentially fixedly connected to the main shaft assembly 6131 from top to bottom, and the periphery of each three-dimensional flow impeller rotor body 1.1 is surrounded by a wear-resistant anvil 1.2.
The first driving device 6132 is a single motor driving device, and is connected to a driving wheel mounted on the main shaft assembly 6131 through a driving belt 6133, and the main shaft assembly 6131 is driven to rotate by the first driving device 6132, so that the three-dimensional flow impeller rotor body 1.1 rotates. Or the first driving device 6132 is a dual-motor driving device, the driving wheel on the main shaft assembly 6131 is connected with the dual-motor driving device through two driving belts 6133, and the main shaft assembly 6131 is driven through the dual-motor driving device, so that the reliability is higher, and the processing capacity is stronger.
The horizontal high-pressure three-dimensional flow ultrafine grinding equipment 62 comprises a mounting rack 621, a plurality of stages of three-dimensional flow grinding devices 622 arranged in parallel are fixedly connected to the mounting rack 621, a second negative-pressure material channel 623 communicated with each other is arranged between every two adjacent three-dimensional flow grinding devices, a feed inlet of the first-stage three-dimensional flow grinding device 622 is connected to the buffer bin 65, and a bottom discharge port is connected with the sorting equipment 63. The three-dimensional flow crushing device 622 comprises a shell 6221, a connecting shaft 6222 is arranged at the axis of the shell 6221, the connecting shaft 6222 is connected with a second driving device 6223 arranged outside the shell 6221, a three-dimensional flow impeller rotor body 1.1 is fixedly connected to the connecting shaft 6222, and a wear-resistant anvil 1.2 surrounds the periphery of the three-dimensional flow impeller rotor body 1.1.
The second driving device 6223 is a double-shaft horizontal motor. The three-dimensional flow crushing devices 622 are arranged in series at least in two stages, and opposite sides of every two adjacent three-dimensional flow crushing devices 622 are provided with bearing seats 6224 for fixing internal connecting shafts 6222; and a biaxial horizontal motor is provided between the two three-dimensional flow crushing devices 622, and the side of the biaxial horizontal motor is connected with a connecting shaft 6222 through a coupling 6225.
The inner wall of the wear-resistant anvil 1.2 is provided with the special-shaped structure 1.3, when materials are thrown out through the three-dimensional flow impeller rotor body 1.1 at a high speed, the materials can impact the inner wall of the wear-resistant anvil 1.2 at a certain angle, the impact area and the wear resistance can be effectively increased through the special-shaped structure 1.3 on the inner wall of the wear-resistant anvil, the materials are prevented from rebounding, and the crushing effect is better. The profile structure may specifically be a tooth-shaped structure, a cylindrical structure, a rectangular structure, or the like.
The sorting equipment 63 is a multistage serial air separation device; the winnowing device can be a cyclone separator, a feed inlet of the first-stage cyclone separator is connected with the high-pressure three-dimensional flow superfine grinding equipment, dust collecting ports at the top of each stage of cyclone separator are connected in series with each other and are connected to the dust pumping system 5 through dust collecting pipelines, and finished product material ports at the bottom of each stage of cyclone separator are connected with the corresponding micro collecting bin 64 or are circularly connected to the high-pressure three-dimensional flow superfine grinding equipment, so that circular processing is realized.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention without departing from the technical spirit of the present invention are within the scope of the present invention.
Claims (10)
1. A6S processing technology of coarse and fine medium micro aggregate for concrete is characterized by comprising the following steps:
s1, pretreating the materials, vibrating and dispersing the materials, primarily desliming the materials, and quantitatively feeding the materials;
s2, performing coarse crushing on the materials, performing circular crushing on the materials, and performing multistage desliming;
s3, finely crushing the materials, circularly crushing the materials in multiple stages, screening and grading, and preparing fine sand and aggregate with different specifications according to the proportion;
s4, performing multi-stage powder selection on the refined sand to prepare various refined sands with different stone powder contents;
s5, deep processing the dust material and the fine aggregate,
recovering the dust materials and the fine aggregates generated in the steps, and performing multi-stage impact crushing on the dust materials and the fine aggregates;
and s6, performing air separation and classification, and performing classified collection to prepare the multi-graded medium and micro aggregate.
2. The 6S processing technology of coarse and fine medium micro-aggregates for concrete according to claim 1, which is characterized in that: in the steps 1 and s2, the materials are sent to a feeding device for vibration dispersion, and after primary desliming is carried out by combining desliming and screening devices, coarse crushing is carried out by adopting coarse crushing devices, screening and desliming are carried out by combining desliming devices, and the screened materials are classified according to particle size; and (5) entering the next production link, or circularly entering crushing equipment for circular crushing.
3. The 6S processing technology of coarse and fine medium micro-aggregates for concrete according to claim 1, which is characterized in that: in step s3, double-speed double-frequency impact shaping is carried out on the coarsely crushed material by adopting a double-host variable frequency control technology, and sand of the sand-aggregate mixture is prepared; screening and grading the sand-stone aggregate mixture to circularly process the super-grain-size materials, and storing the qualified materials in a finished product bin; meanwhile, finished product proportion is adjusted according to the proportion of the material adjusting system to prepare finished product sandstone aggregates with different fineness modulus.
4. The 6S processing technology of coarse and fine medium micro-aggregates for concrete according to claim 1, which is characterized in that: in step s5, according to the characteristics of the dust material and the fine aggregate, high-speed impact energy is applied to the dust material and the fine aggregate, and the high-speed impact energy is larger than the energy for disintegrating the material, so that supercritical dissociation of the material is realized.
5. The 6S processing technology of coarse and fine medium micro-aggregates for concrete according to claim 4, which is characterized in that: three-way flow is adopted to realize high-speed rotation, and dust materials and fine aggregates are thrown onto a wear-resistant anvil for supercritical impact crushing; and dust removal and multi-stage separation are carried out by combining separation equipment, and medium-micro aggregates with different particle sizes are collected or are circularly crushed.
6. The utility model provides a concrete is with little aggregate 6S production line of thickness medium, includes elementary desliming equipment (1), its characterized in that: a material pretreatment device (2) is arranged below a discharge port of a primary desliming device (1), the material pretreatment device (2) is connected with a fine-quality coarse and fine aggregate processing device (3), the fine-quality coarse and fine aggregate processing device (3) is connected with a multi-stage powder selecting device (4), dust removing points of the devices are connected with a dust extracting system (5) through a dust removing pipeline, the dust extracting system (5) is connected with an ultrafine micro aggregate processing device (6), the ultrafine micro aggregate processing device (6) comprises a high-pressure three-dimensional flow ultrafine grinding device and a sorting device (63) connected with the high-pressure three-dimensional flow ultrafine grinding device, a dust outlet of the sorting device (63) is circularly connected to the dust extracting system (5), and a discharge port is connected to a corresponding micro aggregate bin (64) or is circularly connected to the high-pressure three-dimensional flow ultrafine grinding device;
the devices are all connected with a PLC control system for controlling mutual cooperation of the devices.
7. The 6S production line of coarse and fine medium aggregates for concrete according to claim 6, which is characterized in that: the material pretreatment equipment (2) comprises coarse crushing equipment (21), the discharge end of the coarse crushing equipment (21) is connected with first screening and classifying equipment (22) which are arranged in a multi-stage mode, and the discharge hole of the first screening and classifying equipment (22) is circularly connected to the coarse crushing equipment (21) or connected with fine and coarse aggregate processing equipment (3); the coarse crushing device (21) can be a coarse crushing counterattack breaker (211) and a middle crushing counterattack breaker (212) which is arranged in series with the coarse crushing counterattack breaker;
or the coarse crushing equipment (21) is a jaw crusher and a reaction crusher connected in series with the jaw crusher;
or the coarse crushing equipment (21) is a jaw crusher, a cone crusher and an impact crusher which are sequentially connected in series.
8. The 6S production line of coarse and fine medium aggregates for concrete according to claim 6, which is characterized in that: the fine coarse and fine aggregate processing equipment (3) comprises double-speed double-frequency crushing sand making equipment (31) and a finished product screening and proportion adjusting circulating system (32) connected with the double-speed double-frequency crushing sand making equipment, a super-particle-size material discharge port of the finished product screening and proportion adjusting circulating system (32) is circularly connected to the double-speed double-frequency crushing sand making equipment (31), and a finished product sandstone aggregate discharge port is connected to a corresponding sandstone aggregate bin (9) or is circularly connected to the double-speed double-frequency crushing sand making equipment (31).
9. The 6S production line of coarse and fine medium aggregates for concrete according to claim 6, which is characterized in that: the high-pressure three-dimensional flow ultrafine grinding equipment is connected with sorting equipment (63) which is arranged in a multistage series connection mode, and the high-pressure three-dimensional flow ultrafine grinding equipment is vertical shaft type high-pressure three-dimensional flow ultrafine grinding equipment (61) or horizontal three-dimensional flow ultrafine grinding equipment (62).
10. The 6S production line of coarse and fine medium aggregates for concrete according to claim 9, which is characterized in that: the vertical shaft type high-pressure three-dimensional flow ultrafine grinding equipment (61) comprises a support (611), a cylinder (612) is arranged on the support (611), a feeding hole in the top of the cylinder (612) is connected to a buffer bin (65), and a discharging hole in the bottom of the cylinder is connected with sorting equipment (63); a plurality of layers of three-dimensional flow crushing mechanisms (613) are arranged in the cylinder body (612) from top to bottom, and the bottoms of the adjacent three-dimensional flow crushing mechanisms (613) are connected through a first negative pressure material channel (614);
horizontal high pressure ternary flow superfine crushing apparatus (62) includes mounting bracket (621), has linked firmly multistage ternary flow reducing mechanism (622) that sets up side by side on mounting bracket (621), is equipped with second negative pressure material passageway (623) that communicate each other between the adjacent ternary flow reducing mechanism, and the feed inlet of first level ternary flow reducing mechanism (622) is connected to buffer bin (65), and the bottom discharge mouth links to each other with sorting facilities (63).
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| CN202010739113.9A CN111841849A (en) | 2020-07-28 | 2020-07-28 | Thick-medium-fine micro aggregate 6S processing technology for concrete and production line |
| PCT/CN2021/088931 WO2022021960A1 (en) | 2020-07-28 | 2021-04-22 | 6s processing process and production line of coarse and fine meso- and microaggregates for concrete |
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| CN202010739113.9A CN111841849A (en) | 2020-07-28 | 2020-07-28 | Thick-medium-fine micro aggregate 6S processing technology for concrete and production line |
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