CN110639675B - Fine concrete aggregate processing system and fine concrete aggregate system processing method - Google Patents
Fine concrete aggregate processing system and fine concrete aggregate system processing method Download PDFInfo
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- CN110639675B CN110639675B CN201910757052.6A CN201910757052A CN110639675B CN 110639675 B CN110639675 B CN 110639675B CN 201910757052 A CN201910757052 A CN 201910757052A CN 110639675 B CN110639675 B CN 110639675B
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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
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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
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/28—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
- B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
- B07B9/00—Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
Abstract
The invention provides a fine concrete aggregate system processing method and a fine concrete aggregate processing system, which comprise a first sieve, a second sieve, a third sieve and a fourth sieve; the device also comprises a medium crushing adjusting bin, a medium crushing device, a fine crushing adjusting bin, a fine crushing device, a sand making shaping adjusting bin and a sand making shaping device; the diameter of the mesh of the two screens can be changed, and the configured adhesive tape machine is provided with a joint so as to send aggregate to different destinations according to the change of the aperture of the screen mesh, thereby realizing the aim of two production standards of one line. In addition, the closed-loop process is adopted in the fine crushing and sand making and shaping processing, so that the aggregate of the product is fully crushed and shaped, the amount of needle-shaped aggregate and over-diameter aggregate is reduced, and the quality of the final sandstone aggregate product is improved; the adjusting bin or the adjusting material pile is arranged in front of the crushing and screening equipment, so that the continuous production of a processing system is ensured, the equipment utilization rate is improved, and the idle consumption of the equipment is reduced.
Description
Technical Field
The invention relates to a fine concrete aggregate processing system and a fine concrete aggregate system processing method. Is suitable for the field of concrete aggregate processing.
Background
The quality of concrete aggregate can directly influence the quality of concrete, thereby influencing the safety and durability of buildings and playing an important role in hydraulic and hydroelectric engineering, building engineering, highways, railways and bridge engineering. However, with the improvement of the environmental protection requirement, the yield of the natural sandstone aggregate is reduced year by year, and the supply is not sufficient, while the artificial sandstone aggregate has the similar property with the natural sandstone aggregate, so that the processing and production process is more environment-friendly, and the controllable product quality is paid attention by the sandstone aggregate industry.
The water conservancy and hydropower industry has rich experience in the artificial sandstone industry, but the specification standards used in different industries have different requirements on the particle size of sandstone aggregates, for example, construction pebbles and gravels (GB/T14685-2011) divide the pebble and gravel aggregate particles into 13 types of aggregate particles, namely, the aggregate particles are less than 90mm, 90mm to 75mm, 75mm to 63mm, 63mm to 53mm, 53mm to 37.5mm, 37.5mm to 31.5mm, 31.5mm to 26.5mm, 26.5mm to 19mm, 19mm to 16mm, 16mm to 9.5mm, 9.5mm to 4.75mm, 4.75 to 2.36mm and more than 2.36 mm. The design specification of hydroelectric engineering sandstone processing system (DL/T50982010) divides coarse aggregate into 5 kinds of extra large stones (80-150 mm), large stones (40-80 mm), medium stones (20-40 mm), small stones (5-20 mm) and fine aggregate (less than 5 mm). The railway ballast crushing (TB/T2140-. Therefore, if the commercial aggregate production and processing system is directly applied to the aggregate processing system in the hydraulic and hydroelectric engineering, the product gradation, yield and quality of the commercial aggregate production and processing system cannot be matched with the requirements of projects of different industries on concrete aggregates in the market. Due to the large demand of concrete and centralized use places, the hydraulic and hydroelectric engineering is often provided with a sand and stone processing system near dam sites, and more house building engineering, highways, railways and bridge engineering adopt commercial aggregates. Therefore, a fine concrete aggregate processing system suitable for various industry requirements is needed.
Disclosure of Invention
The invention aims to provide a system processing method of fine concrete aggregate, which achieves the aim of two production standards in one line. Therefore, the invention adopts the following technical scheme:
a fine concrete aggregate system processing method is characterized in that:
a. separating the rough materials on the discharging platform by using a bar feeder and a pre-screening machine to separate stone chips with the particle size of less than 10mm and large mud content as waste materials, and feeding aggregate with the particle size of 10 mm-130 mm into a semi-finished product pile; crushing aggregate with the particle size of more than 130mm by coarse crushing equipment, and then stacking the crushed aggregate in a semi-finished product stack;
b. feeding aggregate in the semi-finished product stack into a screen, wherein the screen adopts a three-layer screen mesh circular vibration screen, and the mesh diameters are 80mm, 31.5mm and 16 mm; after screening, feeding the semi-finished aggregate with the size of more than 75mm into a medium crushing adjusting bin, and then feeding the semi-finished aggregate into medium crushing equipment; feeding the semi-finished product with the thickness of 75-31.5 mm into a fine crushing adjusting bin, and then feeding the semi-finished product into fine crushing equipment; 31.5 mm-16 mm of the slurry enters a sand making shaping adjusting bin and then enters sand making shaping equipment; feeding the semi-finished product with the size of less than 16mm into a three-sieve;
c. feeding the aggregates crushed by the medium crushing equipment and the fine crushing equipment into a second sieve; the second screen adopts a three-layer screen circular vibrating screen, and the mesh diameters are 40mm, 20mm and 16 mm; returning the semi-finished aggregate which is more than 37.5mm and 37.5 mm-25 mm after being screened to a fine crushing adjusting bin, and further crushing the semi-finished aggregate by fine crushing equipment; feeding the semi-finished product with the thickness of 19-16 mm into a sand making shaping adjusting bin, then feeding the semi-finished product into sand making shaping equipment, and feeding the semi-finished product with the thickness of less than 16mm into a three-screen;
d. Feeding the crushed semi-finished aggregate into a three-screen for screening;
e. three-layer screen mesh circular vibration screen is adopted in the third screen mesh, the mesh diameter is 16mm, 10mm and 5mm, the semi-finished aggregate with the diameter of more than 16mm after screening returns to a sand making shaping adjusting bin, and then enters sand making shaping equipment for further crushing; the aggregates with the thickness of 16 mm-9.5 mm and 9.5 mm-4.75 mm respectively enter respective washing equipment, and then enter respective finished product stock yard, or directly enter respective finished product stock yard; feeding the semi-finished product with the diameter of less than 4.75mm into a four-sieve;
f. and the four sieves adopt a layer of screen mesh circular vibration sieve, the diameter of the screen mesh is 2.5mm, and aggregate with the diameter of 2.36-4.75 mm and aggregate with the diameter less than 2.36mm are respectively stockpiled to respective finished product stockpiling yards after being sieved.
The screen holes of the two-screen device can be adjusted, and the two production standards of one line can be realized by matching with a sealing-tape machine joint with an adjustable discharging position arranged on the conveying line.
Furthermore, when the first layer of screen mesh of the second screen is selected to be screen mesh with aperture of 45mm, and the second layer is selected to be screen mesh with aperture of 25mm, aggregate with two particle sizes of 25 mm-16 mm and 45 mm-25 mm can be produced by matching with a joint of a belt conveyor with adjustable discharge position arranged on a conveying line to be used as railway ballast, and the screened aggregate directly enters respective washing equipment and then enters respective finished product stock yard or directly enters respective finished product stock yard. By adopting one production line, the artificial sandstone aggregate meeting two specifications of construction pebbles and gravels (GB/T14685-.
In the invention, a closed-loop process is adopted in the fine crushing and sand making and shaping processing, so that the aggregate of the product is fully crushed and shaped, and the amount of the needle-shaped aggregate and the amount of the ultra-diameter aggregate are reduced.
In the invention, the adjusting feed bin or the adjusting material pile is arranged in front of the crushing and screening equipment, so that the continuous production of the processing system is ensured. The invention is suitable for production lines with annual output of 50-2000 ten thousand tons. The capacity adjustment of the semi-finished product material pile, the medium-sized aggregate adjusting bin, the fine aggregate adjusting bin and the sand making shaping adjusting bin can be realized, and the continuous production requirement of 1-3 days can be met.
Another object of the present invention is to provide a fine concrete aggregate processing system that achieves the goal of two production standards for one line. Therefore, the invention adopts the following technical scheme:
the utility model provides a fine work concrete aggregate system of processing which characterized in that:
comprises a first sieve, a second sieve, a third sieve and a fourth sieve;
one screen adopts a three-layer screen mesh circular vibrating screen; the semi-finished aggregate screened and intercepted by the first layer enters a medium-sized aggregate adjusting bin through a conveying device, the medium-sized aggregate adjusting bin is connected with medium-sized aggregate equipment through the conveying device, the semi-finished aggregate screened and intercepted by the second layer enters a fine crushing adjusting bin through the conveying device, and the fine crushing adjusting bin is connected with fine crushing equipment through the conveying device; the aggregate of the screened and intercepted semi-finished product of the third layer enters a sand making shaping and adjusting bin through a conveying device, and the sand making shaping and adjusting bin is connected with sand making shaping equipment through the conveying device; semi-finished aggregate on the filtered side of the third layer enters a third screen through a conveying device;
The second screen adopts a three-layer screen circular vibrating screen, outlets of the middle crushing equipment and the fine crushing equipment are connected to a first layer screen of the second screen through a conveying device, semi-finished aggregate intercepted by the first layer screening and semi-finished aggregate intercepted by the second layer screening return to the fine crushing adjusting bin through the conveying device, and semi-finished aggregate intercepted by the third layer screening is sent to the sand making shaping adjusting bin through the conveying device; semi-finished aggregate on the filtered side of the third layer enters a third screen through a conveying device;
the three-layer screen circular vibrating screen is adopted as the three-layer screen, the crushed semi-finished aggregate of the sand making and shaping equipment enters a first layer of screen of the three-layer screen through a conveying device, the semi-finished aggregate screened and intercepted by the first layer returns to a sand making and shaping adjusting bin through the conveying device, the intercepted aggregate screened by the second layer and the intercepted aggregate screened by the third layer are respectively connected to respective washing equipment through the conveying device and then are connected to respective finished product stock yards through the conveying device, or are directly connected to respective finished product stock yards through the conveying device; semi-finished aggregate on the filtered side of the third layer enters a fourth screen through a conveying device;
and the four sieves adopt a layer of sieve mesh circular vibration sieve, and the screened intercepted aggregate and the screened filtered aggregate respectively enter respective finished product stock dump through a conveying device.
Further, the method comprises the following steps: the mesh diameters of the three layers of the screen cloth of the first screen are respectively 80mm, 31.5mm and 16 mm; the mesh diameters of the three layers of the second sieve are respectively 40mm, 20mm and 16 mm; the mesh diameters of three layers of the three screens are respectively 16mm, 10mm and 5 mm; the mesh diameter of the four sieves was 2.5 mm.
Furthermore, a first layer of screen mesh and a second layer of screen mesh on the second screen are replaceable, conveying devices corresponding to the screening interception side of the first layer of the second screen and conveying devices corresponding to the screening interception side of the second layer of the second screen respectively adopt adhesive tape machines and are respectively provided with joints, so that aggregate is conveyed to different destinations according to the change of the aperture of the screen meshes, and the purpose of two production standards of one line is achieved.
Furthermore, the two sieves are replaceable, conveying devices corresponding to the first-layer sieving interception side and conveying devices corresponding to the second-layer sieving interception side of the two sieves respectively adopt adhesive tape machines and are respectively provided with joints to convey aggregates to different destinations according to the change of the screen mesh aperture, the screen mesh aperture of the first layer is 45mm, when the screen mesh aperture of the second layer is 25mm, the aggregates with two particle sizes of 25 mm-16 mm and 45 mm-25 mm can be produced to be used as railway ballast, and the screened aggregates directly enter respective washing equipment through the reversing of the conveying devices and then enter respective finished product stock yards through the conveying devices or directly enter respective finished product stock yards through the conveying devices.
Further, the device comprises a bar feeder and a pre-screening machine, wherein the discharge side of the bar feeder is connected with the pre-screening machine through a conveying device, materials intercepted by the bar feeder are conveyed to coarse crushing equipment through the conveying device, and the materials intercepted by an outlet of the coarse crushing equipment and the pre-screening machine are conveyed to a semi-finished product pile through the conveying device for piling; the semi-finished product pile is connected with a sieve through a conveying device.
In the invention, the coarse crushing equipment adopts a jaw crusher, an impact crusher, a hammer crusher and a gyratory crusher according to the lithology, compressive strength, crushability index, abrasion index and other parameters of a material source;
in the invention, the sand making and shaping equipment can select a vertical shaft impact crusher, a vertical shaft impact crusher plus a rod mill or a sand making building according to production needs;
in the invention, the conveying device can adopt various adhesive tape machines.
The aggregate particle size of the final product described by the process flow is 16-9.5 mm, 9.5-4.75 mm, 4.75-2.36 mm and >2.36mm which can be used for building construction, road and bridge coagulation, can be selectively produced, is 25-16 mm and 45-25 mm, and can be used as railway ballast; the aggregate with other particle sizes can also be produced by adjusting the diameters of the screen holes of the first screen, the second screen, the third screen and the fourth screen.
According to the invention, the water washing equipment can be adjusted according to the mud content of the material source, and if the mud content in the material source is small and the washing requirement is not needed, the water washing equipment can be omitted;
the beneficial effects of the invention are:
(1) the same production line is adopted, so that the artificial sandstone aggregate meeting two specifications of construction pebbles and gravels (GB/T14685-2011) and railway ballast (TB/T2140-;
(2) the two-screen device adopts adjustable screen holes and is matched with a sealing-tape machine joint with an adjustable discharging position arranged on a conveying line to realize the two production standard targets of one line;
(3) the discharging part adopts a feeder and pre-screening equipment, so that the secondary screening effect is achieved, the content of mud in the aggregate is reduced, the purity of the raw material of the product is improved, and the content of mud in the final sandstone aggregate product is reduced;
(4) a closed process is adopted in the fine crushing and sand making shaping processing, so that the aggregate of the product is fully crushed and shaped, the amount of needle-shaped aggregate and over-diameter aggregate is reduced, and the quality of the final sandstone aggregate product is improved;
(5) the adjusting bin or the adjusting material pile is arranged in front of the crushing and screening equipment, so that the continuous production of a processing system is ensured, the equipment utilization rate is improved, and the idle consumption of the equipment is reduced.
Drawings
FIG. 1 is a schematic view of a processing system of the present invention.
Detailed Description
The working flow of the invention is illustrated as follows:
a. the mined wool is conveyed to a discharging platform 2 through a dump truck 1, a feeding machine and pre-screening equipment are adopted at a discharging part, stone chips with the particle size of less than 10mm and large mud content are used as waste materials 5 by a bar feeding machine 3 and a pre-screening machine 4, and aggregate with the particle size of 10 mm-130 mm enters a semi-finished product material pile 7, so that the secondary screening effect is achieved, and the mud content in the aggregate is reduced;
b. the aggregates with the particle size larger than 130mm are crushed by coarse crushing equipment 6 and then enter a semi-finished product material pile 7 for piling;
c. the aggregate in the semi-finished product material pile 7 enters a screen 8, and the screen 8 adopts a three-layer screen mesh circular vibrating screen, and the mesh diameters are 80mm, 31.5mm and 16 mm. After screening, semi-finished aggregate with the thickness of more than 75mm enters a medium crushing adjusting bin 9 and then enters a medium crushing device 10; feeding the semi-finished product with the thickness of 75 mm-31.5 mm into a fine crushing adjusting bin 11, and then feeding the semi-finished product into fine crushing equipment 12; 31.5 mm-16 mm of the sand making plastic adjusting bin 16 and then enters a sand making plastic device 17; the semi-finished product of <16mm enters a three-sieve 18;
d. after the medium crushing device 10 and the fine crushing device 12 crush the aggregates, the aggregates enter a second sieve 13. The second screen adopts a three-layer screen circular vibrating screen, and the diameters of the meshes are 40mm, 20mm and 16 mm. Returning the semi-finished aggregates with the particle size of more than 37.5mm and 37.5-25 mm after being screened to a fine crushing adjusting bin 11, and further crushing the aggregates by a fine crushing device 12; the semi-finished product with the thickness of 19 mm-16 mm enters a sand making shaping adjusting bin 16 and then enters a sand making shaping device 17; the semi-finished product of <16mm enters a three-sieve 18;
e. The second screen 13 is characterized in that when the first screen is selected to have a screen mesh aperture of 45mm, and the second screen is selected to have a screen mesh aperture of 25mm, the joints 14 and 15 of the adhesive tape machine capable of adjusting the discharging position are arranged on the conveying line, so that aggregates with two particle sizes of 25 mm-16 mm and 45 mm-25 mm can be produced and used as railway ballast, and the screened aggregates directly enter washing equipment 20 and 23 and then enter finished product material storage yards 24 and 29;
f. feeding the semi-finished aggregate crushed by the sand making and shaping equipment 17 into a three-screen 18 for screening;
g. the third screen 18 adopts a three-layer screen circular vibration screen, the diameter of the mesh is 16mm, 10mm and 5mm, the semi-finished aggregate with the diameter of more than 16mm after screening returns to the sand making, shaping and adjusting bin 16, and then the semi-finished aggregate enters the sand making and shaping equipment 17 for further crushing; the aggregates with the thickness of 16 mm-9.5 mm and 9.5 mm-4.75 mm respectively enter washing equipment 21 and 22 and then enter finished product storage yards 25 and 26; the semi-finished product of <4.75mm enters a four-sieve 19;
h. the four-screen 19 adopts a layer of screen mesh circular vibration screen, the diameter of the screen mesh is 2.5mm, and aggregates with the diameter of 2.36 mm-4.75 mm and aggregates with the diameter of less than 2.36mm are respectively stockpiled to finished product stockpiling yards 27 and 28.
By adjusting the mesh hole diameters of the first sieve 8, the second sieve 13, the third sieve 18 and the fourth sieve 19, aggregates with other particle sizes can also be produced.
The invention can be applied to the production line with annual output of 50-2000 ten thousand tons; the capacity adjustment of the semi-finished product material pile 7, the fine crushing adjusting bin 9, the fine crushing adjusting bin 11 and the sand making shaping adjusting bin 16 can be realized, and the continuous production requirement of 1-3 days can be met.
The above description is only an embodiment of the present invention, and the technical features of the present invention are not limited thereto, and any changes or modifications within the field of the present invention by those skilled in the relevant art are covered by the protection scope of the present invention.
Claims (1)
1. The utility model provides a fine work concrete aggregate system of processing which characterized in that:
by adopting a production line, artificial sandstone aggregate meeting two specifications of construction pebbles and gravels (GB/T14685-;
the fine concrete aggregate processing system comprises a first sieve, a second sieve, a third sieve and a fourth sieve;
one screen adopts a three-layer screen mesh circular vibrating screen; the semi-finished aggregate screened and intercepted by the first layer enters a medium-sized aggregate adjusting bin through a conveying device, the medium-sized aggregate adjusting bin is connected with medium-sized aggregate equipment through the conveying device, the semi-finished aggregate screened and intercepted by the second layer enters a fine crushing adjusting bin through the conveying device, and the fine crushing adjusting bin is connected with fine crushing equipment through the conveying device; the aggregate of the screened and intercepted semi-finished product of the third layer enters a sand making shaping and adjusting bin through a conveying device, and the sand making shaping and adjusting bin is connected with sand making shaping equipment through the conveying device; semi-finished aggregate on the filtered side of the third layer enters a third screen through a conveying device;
The second screen adopts a three-layer screen circular vibrating screen, outlets of the middle crushing equipment and the fine crushing equipment are connected to a first layer screen of the second screen through a conveying device, semi-finished aggregate intercepted by the first layer screening and semi-finished aggregate intercepted by the second layer screening return to the fine crushing adjusting bin through the conveying device, and semi-finished aggregate intercepted by the third layer screening is sent to the sand making shaping adjusting bin through the conveying device; semi-finished aggregate on the filtered side of the third layer enters a third screen through a conveying device;
the three-layer sieve adopts a three-layer sieve circular vibrating sieve, the semi-finished aggregate crushed by the sand making and shaping equipment enters a first layer of sieve of the three-layer sieve through a conveying device, the semi-finished aggregate intercepted by the first layer of sieve returns to a sand making and shaping adjusting bin through the conveying device, the intercepted aggregate intercepted by the second layer of sieve and the intercepted aggregate intercepted by the third layer of sieve are respectively connected to respective washing equipment through the conveying device and then are connected to respective finished product stock yards through the conveying device, or are directly connected to respective finished product stock yards through the conveying device; semi-finished aggregate on the filtered side of the third layer enters a fourth sieve through a conveying device;
the four sieves adopt a layer of sieve mesh circular vibration sieve, and the screened intercepted aggregate and the screened filtered aggregate respectively enter respective finished product stock dump through a conveying device;
The mesh diameters of three layers of the screen of the first screen are respectively 80mm, 31.5mm and 16 mm; the mesh diameters of the three layers of the second sieve are respectively 40mm, 20mm and 16 mm; the mesh diameters of three layers of the three screens are respectively 16mm, 10mm and 5 mm; the diameter of the meshes of the four sieves is 2.5 mm;
the conveying device corresponding to the first layer screening interception side and the conveying device corresponding to the second layer screening interception side of the second screen respectively adopt adhesive tape machines and are respectively provided with joints to convey aggregates to different destinations according to the change of the screen mesh aperture, the screen mesh aperture of the first layer is 45mm, when the screen mesh aperture of the second layer is 25mm, aggregates with two particle sizes of 25 mm-16 mm and 45 mm-25 mm can be produced and used as railway ballast, and the screened aggregates are reversed by the conveying device, directly enter respective washing equipment, then enter respective finished product stock yards through the conveying device or directly enter respective finished product stock yards through the conveying device;
the fine concrete aggregate processing system comprises a bar feeder and a pre-screening machine, wherein the screening discharge side of the bar feeder is connected with the pre-screening machine through a conveying device, materials intercepted by the bar feeder are conveyed to a coarse crushing device through the conveying device, and the materials intercepted by an outlet of the coarse crushing device and the pre-screening machine are conveyed to a semi-finished product stack through the conveying device for stacking; the semi-finished product pile is connected with a sieve through a conveying device;
The processing method of the fine concrete aggregate system comprises the following steps:
a. separating the rough materials on the discharging platform by using a bar feeder and a pre-screening machine to separate stone chips with the particle size of less than 10mm and large mud content as waste materials, and feeding aggregate with the particle size of 10 mm-130 mm into a semi-finished product pile; crushing aggregate with the particle size of more than 130mm by coarse crushing equipment, and then stacking the crushed aggregate in a semi-finished product pile;
b. feeding the aggregate in the semi-finished product stack into a screen, wherein the screen adopts a three-layer screen mesh circular vibrating screen, and the mesh diameters are 80mm, 31.5mm and 16 mm; after screening, feeding the semi-finished aggregate with the size of more than 75mm into a medium crushing adjusting bin, and then feeding the semi-finished aggregate into medium crushing equipment; feeding the semi-finished product with the thickness of 75 mm-31.5 mm into a fine crushing adjusting bin, and then feeding the semi-finished product into fine crushing equipment; 31.5 mm-16 mm of the sand making plastic adjusting bin, and then enters sand making plastic equipment; feeding the semi-finished product with the size of less than 16mm into a three-sieve;
c. feeding the aggregates crushed by the medium crushing equipment and the fine crushing equipment into a secondary sieve; the second screen adopts a three-layer screen circular vibrating screen, and the mesh diameters are 40mm, 20mm and 16 mm; returning the screened semi-finished aggregate with the particle size of more than 37.5mm and 37.5 mm-25 mm to a fine crushing adjusting bin, and further crushing the semi-finished aggregate by fine crushing equipment; feeding the semi-finished product with the thickness of 19 mm-16 mm into a sand making shaping adjusting bin, then feeding the semi-finished product into sand making shaping equipment, and feeding the semi-finished product with the thickness of less than 16mm into a three-screen;
d. Feeding the semi-finished aggregate crushed by the sand making and shaping equipment into a three-screen for screening;
e. three-layer screen mesh circular vibration screen is adopted in the third screen mesh, the mesh diameter is 16mm, 10mm and 5mm, the semi-finished aggregate with the diameter of more than 16mm after screening returns to a sand making, shaping and adjusting bin, and then enters sand making and shaping equipment for further crushing; aggregates with the thickness of 16 mm-9.5 mm and aggregates with the thickness of 9.5 mm-4.75 mm respectively enter respective washing equipment, and then enter respective finished product stock dump, or directly enter respective finished product stock dump; feeding the semi-finished product with the diameter of less than 4.75mm into a four-screen sieve;
f. adopting a layer of screen mesh circular vibration screen to screen the four screens, wherein the diameter of the screen mesh is 2.5mm, and respectively piling 2.36 mm-4.75 mm aggregates and aggregates smaller than 2.36mm to respective finished product stock yards after screening;
the screen holes of the second screen device can be adjusted, and the two production standard targets of one line can be realized by matching with a sealing-tape machine joint with an adjustable discharging position arranged on the conveying line;
a closed process is adopted in the fine crushing and sand making shaping processing, so that the aggregate of the product is fully crushed and shaped, and the amount of needle-shaped aggregate and oversize aggregate is reduced.
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| CN111302686A (en) * | 2020-03-15 | 2020-06-19 | 中国水利水电第九工程局有限公司 | Processing technology and system for producing concrete aggregate by using complex material source |
| CN111940064A (en) * | 2020-07-23 | 2020-11-17 | 江苏山宝集团有限公司 | Processing technology of high-quality aggregate |
| CN111992319A (en) * | 2020-08-07 | 2020-11-27 | 陕西冶金设计研究院有限公司 | Basalt comprehensive utilization system and process |
| CN112871393B (en) * | 2020-12-24 | 2022-04-05 | 中国水利水电第九工程局有限公司 | Balanced crushing control process in sandstone production |
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