CN118925893A - A sand and stone processing system and method - Google Patents
A sand and stone processing system and method Download PDFInfo
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- CN118925893A CN118925893A CN202410867245.8A CN202410867245A CN118925893A CN 118925893 A CN118925893 A CN 118925893A CN 202410867245 A CN202410867245 A CN 202410867245A CN 118925893 A CN118925893 A CN 118925893A
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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
- B02C23/08—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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Abstract
The invention provides a sand and stone processing system and method, wherein the system comprises a coarse crushing workshop, a medium and fine crushing workshop and a first screening workshop which are sequentially communicated, wherein the medium and fine crushing workshop and the first screening workshop form closed circulation, and a discharge port of the first screening workshop is communicated with a drainage screening workshop, a second screening workshop and a flushing screening workshop; the discharge gate intercommunication in second screening workshop has sand making workshop and beans screening workshop, the discharge gate in sand making workshop and second screening workshop form closed cycle, the discharge gate in sand making workshop, second screening workshop all with the drainage screening workshop intercommunication, be equipped with sand washing fine sand in the second screening workshop and retrieve all-in-one. The invention can meet the requirements of different finished products, and realize production according to the variety and proportion of the required aggregate in different periods of the whole construction of engineering. Meanwhile, the production process of the asphalt concrete aggregate is comprehensively considered. The stone powder content and the water content in the finished sand are uniform and stable, and the product quality is stable.
Description
Technical Field
The invention belongs to the technical field of pumped storage and hydroelectric sandstone aggregate, and particularly relates to a sandstone processing system and method.
Background
Because the quality requirements of pumped storage and hydro-electric engineering on concrete sandstone aggregate are higher, the quality control is strict in aspects of aggregate mud content, powder wrapping, needle-shaped content, sand fineness modulus and the like, the sandstone system needs to produce three coarse aggregates of large stone (40 mm-80 mm), medium stone (20 mm-40 mm), small stone (5 mm-20 mm) and normal sand (less than 5 mm), bedding materials (0 mm-80 mm), drainage materials (5 mm-80 mm), asphalt concrete aggregates and more aggregate varieties. In the whole construction process of engineering, due to various reasons, the variety and proportion of aggregate can have larger fluctuation in different periods, and the problem of how to deal with the fluctuation is solved by corresponding means in the process design. It is therefore imperative to find a process technology for sand processing systems that meets such engineering requirements.
Disclosure of Invention
The invention aims to provide a sand processing system which solves the technical problems in the prior art.
The invention aims to provide a sand processing method, wherein coarse crushing adopts a jaw crusher to open a way for production; the medium crushing adopts an impact crusher to produce open circuit, the medium crushing adopts an impact crusher to produce closed circuit with the first screening, and the first screening workshop produces bedding material, drainage material, large stone and medium stone; the sand making adopts a high-pressure twin-roll machine and a second screening machine to form closed-loop production, and the second screening workshop produces small stones, bean stones and sand.
Therefore, the technical scheme provided by the invention is as follows:
The sand and stone processing system comprises a coarse crushing workshop, a medium and fine crushing workshop and a first screening workshop which are sequentially communicated, wherein the medium and fine crushing workshop and the first screening workshop form closed circulation, and a discharge port of the first screening workshop is communicated with a drainage material screening workshop, a second screening workshop and a flushing screening workshop;
The discharge gate intercommunication in second screening workshop has system sand workshop and beans screening workshop, the discharge gate in system sand workshop and second screening workshop form closed cycle, the discharge gate in system sand workshop, second screening workshop all with drainage screening workshop intercommunication, be equipped with sand washing fine sand in the second screening workshop and retrieve all-in-one.
Still include the pre-screening workshop, pre-screening workshop and coarse crushing workshop intercommunication have same batcher, the discharge gate intercommunication in pre-screening workshop has spoil material canopy and semi-manufactured goods stock, the discharge gate in coarse crushing workshop communicates to semi-manufactured goods stock, semi-manufactured goods stock below is equipped with the ejection of compact corridor with well fine crushing workshop intercommunication.
The coarse crushing workshop is provided with a jaw crusher, the medium and fine crushing workshop is provided with an impact crusher, and the sand making workshop is provided with a high-pressure twin-roll machine and/or a vertical shaft impact crusher.
The pre-screening workshop is provided with a first circular vibrating screen, and the first circular vibrating screen comprises a 60mm screen and a 10mm screen which are sequentially arranged from top to bottom;
the first screening workshop is provided with a second circular vibrating screen, and the second circular vibrating screen comprises an 80mm screen, a 40mm screen and a 20mm screen which are sequentially arranged from top to bottom;
The second screening workshop is provided with a third circular vibrating screen, and the third circular vibrating screen comprises a 10mm screen, a 5mm screen and a 3mm screen which are sequentially arranged from top to bottom;
The drainage screening workshop is provided with a fourth circular vibrating screen, and the aperture of the fourth circular vibrating screen from top to bottom is 40mm or 20mm or is adjusted to be 5mm;
The washing and screening workshop is provided with a circular vibrating screen five which comprises a 40mm screen and a 5mm screen which are sequentially arranged from top to bottom;
the bean screening workshop is provided with a circular vibrating screen six, and the screen mesh of the circular vibrating screen six is adjustable.
The feeder is a bar vibration feeder, and the semi-finished product storage yard is a point pile conical stacker.
Still include waste water treatment system, waste water treatment system includes sand washing fine sand recovery all-in-one, waste water collecting tank, dense tank, return water pond and buffering stirring pond, sand washing fine sand recovery all-in-one exhaust waste water passes through the piping chute and gets into the waste water collecting tank, the waste water collecting tank passes through sediment stuff pump and dense tank intercommunication, dense tank upper portion is equipped with the overflow launder, and the bottom is equipped with the deposition bucket, the deposition bucket passes through sediment stuff pump and buffering stirring pond intercommunication.
A sand processing method adopts a sand processing system, and comprises the following steps:
Step 1), a feeder separates coarse materials with the grain size larger than 150mm, the coarse materials enter a coarse crushing workshop for crushing, materials with the grain size smaller than 150mm are conveyed to a pre-screening workshop by a belt conveyor, the materials with the grain size larger than 10mm after screening and the coarse crushed materials are conveyed to a semi-finished product material pile for piling by the belt conveyor, and the materials with the grain size smaller than 10mm enter a waste pile;
Step 2), conveying the semi-finished product to a medium and fine crushing bin, crushing the semi-finished product in a medium and fine crushing workshop, and conveying the medium crushed material to a first screening workshop through a belt conveyor; aggregate which is larger than 80mm and is partially 20-80 mm and sieved by the first sieving workshop enters a medium fine crushing workshop through a tape machine to be crushed for fine crushing, and crushed materials are conveyed to the first sieving workshop through the tape machine to be subjected to closed cycle;
Step 3), the aggregates with the sizes of 20 mm-40 mm and 40 mm-80 mm screened out from the first screening workshop enter a flushing screening workshop, the aggregates with the sizes of 40 mm-80 mm and the aggregates with the sizes of 20 mm-40 mm are obtained through screening, and the aggregates with the sizes of 0mm-20mm enter a second screening workshop;
Mixing the materials with the residual 0mm to 20mm, 20mm to 40mm and 40mm to 80mm on a tape machine according to a proportion, and sieving in a drainage sieving workshop, wherein part of the mixture with the residual 0mm to 80mm is mixed into a bedding material storage yard; the rest part is fed into a drainage screening workshop for screening, the rest part is 20mm-80mm and all the parts smaller than 5mm are fed into a bedding material pile after being screened by the drainage screening workshop, and the mixture of 5-80mm is fed into the drainage material pile;
Step 4), a part of small stones with the size of 5-20 mm screened out by the second screening workshop enters a finished product pile for piling, and a part of small stones with the size of 5-20 mm enter a bean stone screening workshop for producing bean stones; the rest 5-20 mm small stones and part 3-5 mm materials enter a sand making workshop for sand making and shaping, and then enter a sand washing fine sand recycling integrated machine of a second screening workshop for removing mud and powder to obtain finished sand; considering that the sand rate of the cushion layer is insufficient, part of the finished sand is mixed by a tape machine and then enters the cushion layer material pile, and the rest part of the finished sand enters the finished product material pile.
When asphalt concrete aggregate is required to be produced, the screen mesh diameter of the second screening workshop is from top to bottom: the screen pore diameters of the bean screening workshops are 19mm and 16mm from top to bottom, and are 9.5mm, 4.75mm and 2.36 mm.
The wastewater generated after the sand washing fine sand recycling integrated machine of the second screening workshop in the step 4) is subjected to mud removal and powder removal is led into a wastewater collection tank through a pipe groove, wastewater in the tank is pumped into a thickening tank through a slag slurry pump for concentration, chemical adding treatment is carried out in the concentration process, and the agent accelerates the coagulation and precipitation of slurry solid particles in the thickening tank, so that solid-liquid separation is realized;
the clear water on the upper layer of the thickening tank flows into a water return tank through an overflow groove and is circularly used for flushing materials; the high-concentration slurry after the lower layer is condensed is accumulated in a mud accumulation hopper in the center of the tank bottom, enters a buffer stirring tank for buffering through a slurry pump, is pumped to a filter press workshop through the slurry pump for filter pressing and drying, and clear water enters a water return tank after filter pressing, so that mud cake waste is transported out through an automobile for treatment.
The beneficial effects of the invention are as follows:
In the sand production process, the system of the invention adopts jaw crushing for coarse crushing, and has the advantages of simple structure, light weight, convenient installation and maintenance, reliable work, convenient adjustment of a discharge hole, difficult material clamping and the like; the medium and fine crushing adopts a reaction crusher, and has the advantages of high crushing ratio and good particle shape aiming at the characteristics of limestone lithology. The coarse crushed semi-finished material is crushed in advance and then is subjected to first screening, so that the particle shape of the large stone is guaranteed, the fine crushing and the first screening form a closed circuit, the cushion material and the drainage material are produced from the first screening, and the continuity of the cushion material grading is guaranteed. The sand making adopts a high-pressure pair roller machine, has the advantages of controllable fineness modulus of sand production and less stone powder generation, and can play a role in mud removal and powder control in the second screening closed-circuit wet production.
The invention adopts a wet production process, and the main finished products of the system are as follows: cushion material (0 mm-80 mm) and drainage material (5 mm-80 mm); concrete aggregate with the thickness of 40 mm-80 mm, 20 mm-40 mm, 5 mm-20 mm and less than 5 mm; the bean stone material for anchor spraying (5-13 mm bean stone), the fine aggregate of 0.075-2.36 mm required by asphalt concrete, and the coarse aggregate of 2.36-19 mm (reserved). The invention can meet the requirements of different finished products, and realize production according to the variety and proportion of the required aggregate in different periods of the whole construction of engineering. Meanwhile, the production process of the asphalt concrete aggregate is comprehensively considered. The stone powder content and the water content in the finished sand are uniform and stable, and the product quality is stable.
Drawings
Fig. 1 is a schematic flow chart of the present invention.
In the figure: 1. coarsely crushing a workshop; 2. pre-screening workshops; 3. a medium and fine crushing workshop; 4. a first screening plant; 5. a drainage screening workshop; 6. a second screening plant; 7. a sand making workshop; 8. flushing a screening workshop; 9. a bean stone screening workshop; 10. a waste material shed; 11. a semi-finished product stack; 12. a medium and fine crushing bin; 13. and a feeder.
Detailed Description
Further advantages and effects of the present invention will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present invention with specific examples.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the examples described herein, which are provided to fully and completely disclose the present invention and fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the invention. In the drawings, like elements/components are referred to by like reference numerals.
Unless otherwise indicated, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. In addition, it will be understood that terms defined in commonly used dictionaries should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Example 1
The invention provides a sand and stone processing system, which is shown in figure 1 and comprises a coarse crushing workshop 1, a medium crushing workshop 3 and a first screening workshop 4 which are sequentially communicated, wherein the medium crushing workshop 3 and the first screening workshop 4 form closed circulation, and a discharge port of the first screening workshop 4 is communicated with a drainage screening workshop 5, a second screening workshop 6 and a flushing screening workshop 8;
The discharge gate intercommunication in second screening workshop 6 has sand making workshop 7 and bean screening workshop 9, the discharge gate in sand making workshop 7 and second screening workshop 6 form closed cycle, the discharge gate in sand making workshop 7, second screening workshop 6 all communicate with drainage screening workshop 5, be equipped with sand washing fine sand in the second screening workshop 6 and retrieve the all-in-one.
The aggregate is produced by a coarse crushing workshop 1 and a medium fine crushing workshop 3, wherein fine crushing adopts a crusher and first screening to form closed production, and the first screening workshop 4 produces bedding materials, large stones and medium stones. The sand making adopts a sand making workshop 7 and a second screening to form closed-circuit production, the second screening workshop 6 produces small stones and sand materials for adjusting the fineness modulus of the sand materials, part of coarse sand with the thickness of 3mm to 5mm is returned to a high-pressure pair roller machine for shaping, the high-pressure pair roller machine sand is mixed with process sand with the thickness of less than 3mm, and the sand materials enter the sand materials for storage after mud and powder are removed through a sand washing fine sand recycling device. The invention can realize production according to the variety and proportion of the required aggregate in different periods of the whole construction of the engineering.
Example 2
On the basis of embodiment 1, this embodiment provides a grit processing system, still includes pre-screening workshop 2, pre-screening workshop 2 and coarse crushing workshop 1 intercommunication have same batcher 13, the discharge gate intercommunication in pre-screening workshop 2 has spoil shed 10 and semi-manufactured goods stock 11, the discharge gate intercommunication in coarse crushing workshop 1 is to semi-manufactured goods stock 11, semi-manufactured goods stock 11 below is equipped with the ejection of compact corridor with well fine crushing workshop 3 intercommunication.
The coarse aggregate is picked from stones in the material field, and the grain size of the excavated stones is ensured to be below 800mm by controlling the blasting and combining mechanical crushing. The coarse materials are transported to a discharging platform through a dump truck and discharged into a coarse crushing workshop 1.
The coarse crushing adopts open-circuit production, and in the embodiment, 2 heavy bar vibrating feeders 13 and 2 crushers are arranged in the coarse crushing workshop 1. The coarse materials with the grain size larger than 150mm are separated by a bar feeder 13 and enter a crusher for crushing. The semi-finished product materials are conveyed to a semi-finished product material pile 11 by a tape machine for piling; conveying materials smaller than 150mm to a soil removing and screening workshop by a belt conveyor; the soil removing and screening workshop is provided with 1 circular vibrating screen I, and the screen hole sizes are 60X 60mm and 20X 20mm respectively. The materials with the size of more than 20mm after screening and the materials after coarse crushing are conveyed to a semi-finished product material pile 11 by a tape machine to be piled up, and the materials with the size of less than 20mm enter a waste material shed 10. When the woolen is clean, the woolen can be directly conveyed to the semi-finished product pile 11 for piling up through a tape machine without entering a soil removing and screening workshop.
Example 3
On the basis of the embodiment 1, the embodiment provides a sand and stone processing system, wherein a jaw crusher is arranged in a coarse crushing workshop 1, an impact crusher is arranged in a medium-fine crushing workshop 3, and a high-pressure twin-roll machine is arranged in a sand making workshop 7.
The jaw crusher is selected for coarse crushing, has the advantages of simple structure, light weight, convenient installation and maintenance, reliable work, convenient adjustment of a discharge hole, difficult blockage of materials and the like, and the impact crusher is selected for fine crushing, and has the advantages of high crushing ratio and good particle shape aiming at the characteristics of limestone lithology. The high-pressure twin-roll machine is characterized in that the cross vertical shaft crusher with good sand yield of the product has high grain size, low stone powder yield and wet production.
The two-stage crushing process of jaw crushing, counterattack and double-roll sand making is actually three-stage crushing, namely jaw crushing, middle crushing counterattack, fine crushing counterattack and double-roll sand making (two counterattacks are arranged in the same workshop): wherein jaw breakage and middle breakage are used for counterattack open circuit production, and the continuous breakage process is beneficial to shaping coarse aggregate, reducing needle-like content and reducing closed circulation quantity of the first screening workshop 4.
Example 4
On the basis of the embodiment 2, the embodiment provides a sand and stone processing system, wherein the pre-screening workshop 2 is provided with a circular vibrating screen I, and the circular vibrating screen I comprises a 60mm screen and a 10mm screen which are sequentially arranged from top to bottom;
the first screening workshop 4 is provided with a second circular vibrating screen, and the second circular vibrating screen comprises an 80mm screen, a 40mm screen and a 20mm screen which are sequentially arranged from top to bottom;
the second screening workshop 6 is provided with a third circular vibrating screen, and the third circular vibrating screen comprises a 10mm screen, a 5mm screen and a 3mm screen which are sequentially arranged from top to bottom;
The drainage screening workshop 5 is provided with a fourth round vibrating screen, and the aperture of the fourth round vibrating screen from top to bottom is 40mm or 20mm or is adjusted to the aperture required by 5mm;
The washing and screening workshop 8 is provided with a circular vibrating screen five which comprises a 40mm screen and a 5mm screen which are sequentially arranged from top to bottom;
The bean screening workshop 9 is provided with a circular vibrating screen six, and the screen mesh of the circular vibrating screen six is adjustable. In this example 13mm.
In the embodiment, the middle fine crushing workshop 3 is provided with 2 impact crushers, and the materials after the middle crushing are conveyed to the first screening workshop 4 through a belt conveyor; aggregate which is larger than 80mm and is partially 20-80 mm and is sieved by the first sieving workshop 4 enters the medium-fine crushing workshop 3 through a tape machine for crushing, and crushed materials are conveyed to the first sieving workshop 4 through the tape machine for closed cycle; the first screening plant 4 is provided with 4 heavy circular vibrating screens, and the sizes of the screen openings are respectively 80mm multiplied by 80mm, 40mm multiplied by 40mm and 20mm multiplied by 20mm. The mixture crushed in the middle fine crushing workshop 3 is conveyed to a first screening workshop 4 by a belt conveyor, and materials with the diameter of more than 80mm and part of aggregate with the diameter of 20-80 mm are conveyed into a middle fine crushing adjusting bin by the belt conveyor for cyclic crushing (with adjustable proportion).
In consideration of saving production cost, the bedding material and the drainage material are sieved by the first sieving workshop 4 after 'jaw breaking, medium crushing counterattack and fine crushing counterattack', and dry production (without flushing) is adopted before (including) the first sieving workshop 4.
The washing and screening workshop 8 is provided with a circular vibrating screen five, and the marble and the medium stone after washing and screening are conveyed to a finished product storage yard for storage through a tape machine. And conveying the cushion material with the thickness of 0-80 mm to a cushion material storage yard through a tape machine. The drainage screening workshop 5 is provided with a circular vibrating screen IV, 5-80 mm is conveyed to a drainage stock yard after screening, and less than 5mm below the screen is mixed into a cushion stock yard through a tape machine; the rest 5-20 mm and 3-5 mm materials enter a sand making workshop for sand making shaping 7, 1 high-pressure twin-roll machine is arranged for producing machine-made sand, the machine-made sand smaller than 5mm enters a sand washing fine sand recovery device for removing mud and powder, the rest enters a cushion material through a tape machine, and the sand quantity of the cushion material is supplemented. The high-pressure roller pair machine is suitable for a dry method or a wet method of a sand and stone production line, has higher yield, less powder production and has a shaping function on coarse sand.
The second screening workshop 6 is a wet process, two circular vibrating screens III are arranged in the workshop, the sizes of screen openings are respectively 10mm multiplied by 10mm, 5mm multiplied by 5mm and 3mm multiplied by 3mm, and 2 sand washing fine sand recycling integrated machines with the speed of 50t/h are arranged on the bottom layer; small stone with 5-20 mm part and (5) entering a finished material pile for storage. The bean screening plant 9 is provided with a circular vibrating screen six, and part of the circular vibrating screen is used for producing the bean. The rest 5-20 mm and 3-5 mm materials enter a sand making workshop for sand making shaping 7, 1 high-pressure twin-roll machine is arranged for producing machine-made sand, the machine-made sand smaller than 5mm enters a sand washing fine sand recovery device for removing mud and powder, the rest enters a cushion material through a tape machine, and the sand quantity of the cushion material is supplemented. 5-9.5 mm and 9.5-20 mm can be flexibly matched with a two-sieve closed-circuit sand making according to proportion, and the grading is adjusted to be Dan Lijing.
In order to control the mud content and the stone powder content of the sand, the mixture of the small stone and the finished sand is washed and screened in a second screening workshop 6, and the fine sand is produced by a wet method and recovered; in order to control the amount of aggregate powder, a circular vibrating screen is arranged before the aggregate powder enters a finished product bin to wash the finished product marble and medium stone.
As shown in fig. 1, the finished product materials produced by the invention are as follows: cushion material (0 mm-80 mm) and drainage material (5 mm-80 mm); concrete aggregate with the thickness of 40 mm-80 mm, 20 mm-40 mm, 5 mm-20 mm and less than 5 mm; the bean stone material for anchor spraying (5-13 mm bean stone), the fine aggregate of 0.075-2.36 mm required by asphalt concrete, and the coarse aggregate of 2.36-19 mm (reserved). The invention can meet the requirements of different finished products, and realize production according to the variety and proportion of the required aggregate in different periods of the whole construction of engineering. Meanwhile, the production process of the asphalt concrete aggregate is comprehensively considered. The stone powder content and the water content in the finished sand are uniform and stable, and the product quality is stable.
Example 5
On the basis of the embodiment 2, the embodiment provides a sand processing system, the feeder 13 is a bar vibration feeder 13, and the semi-finished product storage yard is a point pile conical stacker.
The source is limestone and rapid sandstone stones, the grain size of the coarse materials is required to be not more than 800mm, and coarse materials with larger mud content are not allowed to enter a sandstone processing system. The raw materials with the size larger than 150mm are separated from the source by a bar feeder 13 and enter a coarse crushing workshop 1 for crushing.
The semi-finished product storage yard is a point pile conical material pile, 1 gallery is arranged below the material pile for discharging, and the semi-finished product is conveyed to a medium and fine crushing workshop 3.
Example 6
On the basis of embodiment 1, this embodiment provides a grit processing system, still includes wastewater treatment system, wastewater treatment system includes sand washing fine sand recovery all-in-one, wastewater collection pond, dense tank, return water pond and buffering stirring pond, sand washing fine sand recovery all-in-one exhaust waste water passes through the piping infrastructure and gets into the wastewater collection pond, the wastewater collection pond passes through sediment stuff pump and dense tank intercommunication, dense tank upper portion is equipped with the overflow launder, and the bottom is equipped with the accumulation mud bucket, the accumulation mud bucket passes through sediment stuff pump and buffering stirring pond intercommunication.
The second screening plant 6 and the flushing screening plant 8 are main output points of wastewater, the suspended solids concentration of the wastewater is high, and sand washing and fine sand recycling integrated machines in the second screening plant 6 are needed to remove and recycle coarse particles in the sand and stone wastewater, so that the suspended solids concentration is reduced. The waste water produced in the production process is introduced into a waste water collecting tank through a pipe groove, waste water in the tank is concentrated through a slurry pump, and dosing treatment is carried out in the concentration process, so that the slurry solid particles in the concentration tank are coagulated and precipitated by the medicament to realize solid-liquid separation; the clear water on the upper layer of the thickening tank flows into a water return tank through an overflow groove and is circularly used for flushing materials; the high-concentration slurry after the lower layer is condensed is accumulated in a mud accumulation hopper in the center of the tank bottom, enters a buffer stirring tank for buffering through a slurry pump, is pumped to a filter press workshop through the slurry pump for filter pressing and drying, and clear water enters a water return tank after filter pressing, so that mud cake waste is transported out through an automobile for treatment.
Example 7
The embodiment provides a sand processing method, as shown in fig. 1, comprising the following steps:
Step 1), a feeder 13 separates coarse materials with the diameter of more than 150mm, the coarse materials enter a coarse crushing workshop 1 for crushing, materials with the diameter of less than 150mm are conveyed to a pre-screening workshop 2 by a belt conveyor, the materials with the diameters of more than 20mm after screening and the coarse materials are conveyed to a semi-finished product material pile 11 for piling by the belt conveyor, and the materials with the diameters of less than 20mm enter a waste soil pile;
Step 2), conveying the semi-finished product to a medium and fine crushing bin 12, crushing the semi-finished product in a medium and fine crushing workshop 3, and conveying the medium crushed material to a first screening workshop 4 through a belt conveyor; aggregate which is larger than 80mm and is partially 20-80 mm and is sieved by the first sieving workshop 4 enters the medium-fine crushing workshop 3 through a tape machine for crushing, and crushed materials are conveyed to the first sieving workshop 4 through the tape machine for closed cycle;
Step 3), the aggregate with the size of 20 mm-40 mm and the size of 40 mm-80 mm screened by the first screening workshop 4 enters a flushing screening workshop 8, 40 mm-80 mm large stone aggregate and 20 mm-40 mm medium stone aggregate are obtained through screening, and the aggregate with the size of 0mm-20mm enters a second screening workshop 6;
Mixing the materials with the residual 0mm to 20mm, 20mm to 40mm and 40mm to 80mm on a tape machine according to a proportion, and sieving in a drainage sieving workshop, wherein part of the mixture with the residual 0mm to 80mm is mixed into a bedding material storage yard; the rest part is fed into a drainage screening workshop for screening, the rest part is 20mm-80mm and all the parts smaller than 5mm are fed into a bedding material pile after being screened by the drainage screening workshop, and the mixture of 5-80mm is fed into the drainage material pile;
Step 4), a part of small stones with 5-20 mm screened by the second screening workshop 6 enter a finished product material pile for storage, and a part of small stones with 5-20 mm enter a bean stone screening workshop 9 for producing bean stones; the rest 5-20 mm small stones and part 3-5 mm materials enter a sand making workshop 7 for sand making and shaping, and then enter a sand washing fine sand recycling integrated machine of a second screening workshop 6 for removing mud and powder to obtain finished sand; considering that the sand rate of the cushion layer is insufficient, part of the finished sand is mixed by a tape machine and then enters the cushion layer material pile, and the rest part of the finished sand enters the finished product material pile.
Because the sand rate of the cushion material is 30-45%, the sand rate of the cushion material obtained by the invention does not meet the requirement, so that part of finished sand is supplemented with the sand rate required by the cushion material through a tape machine: and feeding part 0-80mm into a drainage material screening workshop, and feeding part 40-80mm or part 20-80mm into a bedding material pile after screening to obtain the drainage material grading.
The source of the invention produced by the process is limestone and rapid sandstone sandwiched by limestone, the grain size of the coarse aggregate is required to be not more than 800mm, and the coarse aggregate with larger mud content is not allowed to enter a sandstone processing system. The sand processing system adopts a wet production process, and the main finished products of the system are as follows: cushion material (0 mm-80 mm) and drainage material (5 mm-80 mm); concrete aggregate with the thickness of 40 mm-80 mm, 20 mm-40 mm, 5 mm-20 mm and less than 5 mm; the process flow of the aggregate is determined by spraying the bean stone material (5-13 mm bean stone) for anchor, the fine aggregate of 0.075-2.36 mm required by asphalt concrete and the coarse aggregate (reserved) of 2.36-19 mm: "jaw breaking+counterattack+twin roll sanding".
Example 8
On the basis of example 7, this example provides a sand processing method, when asphalt concrete aggregate needs to be produced, the screen aperture of the second screening plant 6 is from top to bottom: the sieve pore diameters of the bean sieving plant 9 are 19mm and 16mm from top to bottom, 9.5mm, 4.75mm and 2.36 mm.
The invention comprehensively considers the production process of the asphalt concrete aggregate.
In the step 4), the wastewater generated after the sand washing fine sand recycling integrated machine of the second screening workshop 6 removes mud and powder is led into a wastewater collection tank through a pipe groove, the wastewater in the tank is pumped into a thickening tank through a slag slurry pump for concentration, chemical adding treatment is carried out in the concentration process, and the agent accelerates the coagulation and precipitation of slurry solid particles in the thickening tank, so that solid-liquid separation is realized;
the clear water on the upper layer of the thickening tank flows into a water return tank through an overflow groove and is circularly used for flushing materials; the high-concentration slurry after the lower layer is condensed is accumulated in a mud accumulation hopper in the center of the tank bottom, enters a buffer stirring tank for buffering through a slurry pump, is pumped to a filter press workshop through the slurry pump for filter pressing and drying, and clear water enters a water return tank after filter pressing, so that mud cake waste is transported out through an automobile for treatment.
According to the characteristics of different source lithology and large demand of finished sand, the main process flow is 'two-stage crushing, two-stage screening and high-pressure roll-pair machine-made sand shaping', and the process has the advantages of simple flow and good finished grain. Mud and more flakes are attached to the interlayer of the source after field blasting. In order to reduce the needle-shaped content of aggregate and consider that the demand of the marble is small, the continuous breaking process is adopted to improve the yield and quality of the finished product material, and a circular vibrating screen is arranged to flush the finished product marble and medium stone before entering the finished product bin; in order to control the sand mud content and the stone dust content, the mixture of the small stones and the finished sand is screened in a second screening workshop 6, washed and screened, and fine sand is recovered; in order to ensure the demand of sand, redundant small stones and part of coarse sand enter a high-pressure roller machine to make sand and adjust the fineness modulus.
The foregoing examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and all designs that are the same or similar to the present invention are within the scope of the present invention.
Claims (9)
1. A sand processing system, characterized in that: the device comprises a coarse crushing workshop, a medium and fine crushing workshop and a first screening workshop which are sequentially communicated, wherein the medium and fine crushing workshop and the first screening workshop form closed circulation, and a discharge port of the first screening workshop is communicated with a drainage material screening workshop, a second screening workshop and a flushing screening workshop;
The discharge gate intercommunication in second screening workshop has system sand workshop and beans screening workshop, the discharge gate in system sand workshop and second screening workshop form closed cycle, the discharge gate in system sand workshop, second screening workshop all with drainage screening workshop intercommunication, be equipped with sand washing fine sand in the second screening workshop and retrieve all-in-one.
2. A sand processing system according to claim 1, wherein: still include the pre-screening workshop, pre-screening workshop and coarse crushing workshop intercommunication have same batcher, the discharge gate intercommunication in pre-screening workshop has spoil material canopy and semi-manufactured goods stock, the discharge gate in coarse crushing workshop communicates to semi-manufactured goods stock, semi-manufactured goods stock below is equipped with the ejection of compact corridor with well fine crushing workshop intercommunication.
3. A sand processing system according to claim 1, wherein: the coarse crushing workshop is provided with a jaw crusher, the medium and fine crushing workshop is provided with an impact crusher, and the sand making workshop is provided with a high-pressure twin-roll machine and/or a vertical shaft impact crusher.
4. A sand processing system according to claim 2, wherein: the pre-screening workshop is provided with a first circular vibrating screen, and the first circular vibrating screen comprises a 60mm screen and a 10mm screen which are sequentially arranged from top to bottom;
The first screening workshop is provided with a second circular vibrating screen, and the second circular vibrating screen comprises an 80mm screen, a 40mm screen and a20 mm screen which are arranged from top to bottom;
The second screening workshop is provided with a third circular vibrating screen, and the third circular vibrating screen comprises a 10mm screen, a 5mm screen and a 3mm screen which are arranged from top to bottom;
The drainage screening workshop is provided with a fourth circular vibrating screen, and the aperture of the fourth circular vibrating screen from top to bottom is 40mm or 20mm or is adjusted to be 5mm;
the washing and screening workshop is provided with a circular vibrating screen five which comprises a 40mm screen and a 5mm screen from top to bottom;
the bean screening workshop is provided with a circular vibrating screen six, and the screen mesh of the circular vibrating screen six is adjustable.
5. A sand processing system according to claim 2, wherein: the feeder is a bar vibration feeder, and the semi-finished product storage yard is a point pile conical stacker.
6. A sand processing system according to any one of claims 1 to 5, wherein: still include waste water treatment system, waste water treatment system includes sand washing fine sand recovery all-in-one, waste water collecting tank, dense tank, return water pond and buffering stirring pond, sand washing fine sand recovery all-in-one exhaust waste water passes through the piping chute and gets into the waste water collecting tank, the waste water collecting tank passes through sediment stuff pump and dense tank intercommunication, dense tank upper portion is equipped with the overflow launder, and the bottom is equipped with the deposition bucket, the deposition bucket passes through sediment stuff pump and buffering stirring pond intercommunication.
7. A method of sand processing using the sand processing system of claim 2, characterized by: the method comprises the following steps:
Step 1), a feeder separates coarse materials with the grain size larger than 150mm, the coarse materials enter a coarse crushing workshop for crushing, materials with the grain size smaller than 150mm are conveyed to a pre-screening workshop by a belt conveyor, the materials with the grain size larger than 10mm after screening and the coarse crushed materials are conveyed to a semi-finished product material pile for piling by the belt conveyor, and the materials with the grain size smaller than 10mm enter a waste pile;
Step 2), conveying the semi-finished product to a medium and fine crushing bin, crushing the semi-finished product in a medium and fine crushing workshop, and conveying the medium crushed material to a first screening workshop through a belt conveyor; aggregate which is larger than 80mm and is partially 20-80 mm and sieved by the first sieving workshop enters a medium fine crushing workshop through a tape machine to be crushed for fine crushing, and crushed materials are conveyed to the first sieving workshop through the tape machine to be subjected to closed cycle;
Step 3), the aggregates with the sizes of 20 mm-40 mm and 40 mm-80 mm screened out from the first screening workshop enter a flushing screening workshop, the aggregates with the sizes of 40 mm-80 mm and the aggregates with the sizes of 20 mm-40 mm are obtained through screening, and the aggregates with the sizes of 0mm-20mm enter a second screening workshop;
Mixing the materials with the residual 0mm to 20mm, 20mm to 40mm and 40mm to 80mm on a tape machine according to a proportion, and sieving in a drainage sieving workshop, wherein part of the mixture with the residual 0mm to 80mm is mixed into a bedding material storage yard; the rest part is fed into a drainage screening workshop for screening, the rest part is 20mm-80mm and all the parts smaller than 5mm are fed into a bedding material pile after being screened by the drainage screening workshop, and the mixture of 5-80mm is fed into the drainage material pile;
Step 4), a part of small stones with the size of 5-20 mm screened out by the second screening workshop enters a finished product pile for piling, and a part of small stones with the size of 5-20 mm enter a bean stone screening workshop for producing bean stones; the rest 5-20 mm small stones and part 3-5 mm materials enter a sand making workshop for sand making and shaping, and then enter a sand washing fine sand recycling integrated machine of a second screening workshop for removing mud and powder to obtain finished sand; considering that the sand rate of the cushion layer is insufficient, part of the finished sand is mixed by a tape machine and then enters the cushion layer material pile, and the rest part of the finished sand enters the finished product material pile.
8. A method of sand processing according to claim 7, wherein: when asphalt concrete aggregate is required to be produced, the screen mesh diameter of the second screening workshop is from top to bottom: the screen pore diameters of the bean screening workshops are 19mm and 16mm from top to bottom, and are 9.5mm, 4.75mm and 2.36 mm.
9. A method of sand processing according to claim 7, wherein: the wastewater generated after the sand washing fine sand recycling integrated machine of the second screening workshop in the step 4) is subjected to mud removal and powder removal is led into a wastewater collection tank through a pipe groove, wastewater in the tank is pumped into a thickening tank through a slag slurry pump for concentration, chemical adding treatment is carried out in the concentration process, and the agent accelerates the coagulation and precipitation of slurry solid particles in the thickening tank, so that solid-liquid separation is realized;
the clear water on the upper layer of the thickening tank flows into a water return tank through an overflow groove and is circularly used for flushing materials; the high-concentration slurry after the lower layer is condensed is accumulated in a mud accumulation hopper in the center of the tank bottom, enters a buffer stirring tank for buffering through a slurry pump, is pumped to a filter press workshop through the slurry pump for filter pressing and drying, and clear water enters a water return tank after filter pressing, so that mud cake waste is transported out through an automobile for treatment.
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