CN115608609A - Sandstone processing method and system based on natural sand gravel - Google Patents
Sandstone processing method and system based on natural sand gravel Download PDFInfo
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- CN115608609A CN115608609A CN202211245250.2A CN202211245250A CN115608609A CN 115608609 A CN115608609 A CN 115608609A CN 202211245250 A CN202211245250 A CN 202211245250A CN 115608609 A CN115608609 A CN 115608609A
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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
- B07B1/34—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens jigging or moving to-and-fro perpendicularly or approximately perpendiculary to the plane of the screen
- B07B1/343—Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens jigging or moving to-and-fro perpendicularly or approximately perpendiculary to the plane of the screen with mechanical drive elements other than electromagnets
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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
- B07B1/42—Drive mechanisms, regulating or controlling devices, or balancing devices, specially adapted for 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
- B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The application discloses grit processing method and system based on natural sand gravel, including following step: pre-screening the raw materials to prepare over-diameter stone with the grain diameter of more than 80mm, large stone finished product with the grain diameter of 40-80 mm and natural material with the grain diameter of less than 40 mm; washing the natural material with stones, and then screening to prepare a medium Dan Cheng material with the particle size of 20-40 mm, a small stone finished product with the particle size of 5-20 mm and a sand material with the particle size of less than 5mm, wherein the sand material with the particle size of less than 5mm is prepared into natural sand; coarsely crushing the over-diameter stone, then screening to prepare materials with the particle size of 40-80 mm and the particle size of less than 40mm, and screening and adjusting the crushed materials with the particle size of 40-80 mm and the materials with the particle size of less than 40 mm; screening to prepare a material with the particle size of more than 40mm, a medium Dan Cheng material, a small stone finished product material and a sand material with the particle size of less than 5mm, wherein the sand material with the particle size of less than 5mm forms machine-made sand; natural sand and machine-made sand mix and make finished product sand, and this application has the advantage that has reduced water intensity and sewage treatment pressure.
Description
Technical Field
The application relates to the technical field of mineral aggregate processing, in particular to a sand and stone processing method and system based on natural sand gravel.
Background
Natural gravel is generally referred to as a mixture of natural river sand and gravel, and is sand that has not been machined, and some other river pebbles are also referred to as gravel. The natural sand gravel is used as a product processed by processing mother rock, and the three-grade and two-grade mixed concrete is mainly supplied.
At present, natural gravel materials are mostly processed by a wet method due to high mud content, so that the water consumption and the strength are high, the sewage treatment scale is large, the pressure is high, and the investment is large.
Disclosure of Invention
The application mainly aims to provide a sandstone processing method and a sandstone processing system based on natural sand gravel, and aims to solve the technical problems that the existing sandstone processing aiming at natural sand gravel materials mostly adopts a wet processing technology, the water use strength is high, and the sewage treatment pressure is large.
In order to achieve the above object, the present application provides a sand and stone processing method based on natural sand and gravel, comprising the following steps:
pre-screening a natural sand gravel raw material to respectively prepare an oversize stone material with the grain size of more than 80mm, a large stone finished product material with the grain size of 40-80 mm and a natural material with the grain size of less than 40 mm;
washing the natural material with the particle size of less than 40 mm;
screening and grading the natural material with the particle size of less than 40mm after stone washing to prepare a Dan Cheng material with the particle size of 20-40 mm, a small stone finished product material with the particle size of 5-20 mm and a sand material with the particle size of less than 5mm, and carrying out sand washing and dehydration treatment on the sand material with the particle size of less than 5mm to prepare natural sand;
coarsely crushing the oversize stone with the grain size of more than 80mm, and then screening and grading to prepare a material with the grain size of 40-80 mm and a material with the grain size of less than 40 mm; the materials with the particle size of 40-80 mm are subjected to intermediate crushing and then enter a screening adjustment link, and the materials with the particle size of less than 40mm directly enter the screening adjustment link to form a mixture;
screening and grading the mixture after the screening and adjusting step to prepare a material with the particle size of more than 40mm, a medium Dan Cheng material with the particle size of 20-40 mm, a small stone finished product with the particle size of 5-20 mm and a sand material with the particle size of less than 5mm, and enabling the material with the particle size of more than 40mm to enter a crushing and sand making step, wherein the sand material with the particle size of less than 5mm forms machine-made sand;
and mixing the prepared natural sand and the machine-made sand according to a proportion to prepare finished sand.
Optionally, after the mixture after the screening and adjusting step is screened and graded, the method further includes:
feeding the material with the particle size larger than 40mm into a crushing and sand making link;
and returning the product generated in the crushing and sand making step to the screening and adjusting step.
Optionally, in the step of pre-screening the natural gravel material to respectively prepare the oversize stone material with the grain size larger than 80mm, the large stone finished material with the grain size of 40-80 mm and the natural material with the grain size smaller than 40mm, if the large stone finished material with the grain size of 40-80 mm is redundant when the batch preparation amount is met, the redundant material is put into a middle crushing link.
Optionally, the mixture after the screening and adjusting step is screened and graded to obtain a material with a particle size of more than 40mm, a medium Dan Cheng material with a particle size of 20-40 mm, a small stone finished product with a particle size of 5-20 mm and a sand material with a particle size of less than 5mm, the material with a particle size of more than 40mm enters a crushing and sand making step, and in the step of forming the machine-made sand from the sand material with a particle size of less than 5mm, if the medium Dan Cheng material with a particle size of 20-40 mm and/or the small stone finished product with a particle size of 5-20 mm are/is redundant, the redundant material enters the crushing and sand making step.
A processing system for use in a method of natural sand and gravel based sand processing as described above, comprising:
the natural sand gravel pre-screening system comprises a pre-screening workshop, wherein the pre-screening workshop is provided with two layers of screens, the sizes of screen holes are respectively 80mm multiplied by 80mm and 40mm multiplied by 40mm, and the pre-screening workshop is used for pre-screening natural sand gravel raw materials;
the stone washer is used for carrying out stone washing treatment on the natural material with the grain diameter smaller than 40mm, which is prepared by pre-screening;
the transfer material bin is used for storing the natural material with the particle size smaller than 40mm after stone washing;
the second screen workshop is provided with two layers of screens, the sizes of screen holes are respectively 20mm multiplied by 20mm and 5mm multiplied by 5mm, and the second screen workshop is used for screening and grading the natural materials with the particle size of less than 40mm after stone washing;
the sand washer is used for carrying out sand washing treatment on the sand material with the particle size smaller than 5mm prepared in the secondary screening workshop;
the dewatering screen is used for dewatering the sand material with the grain size smaller than 5mm after sand washing treatment;
the coarse crushing crusher is used for coarsely crushing the over-diameter stone with the particle size larger than 80 mm;
the three-screen workshop is provided with a layer of screens, the screen holes are 40 multiplied by 40mm in size, and the three-screen workshop is used for screening and grading the coarse crushed products;
the semi-finished product bin is used for storing materials with the grain size of 40-80 mm prepared in a three-screen workshop and redundant large stone finished products with the grain size of 40-80 mm prepared by pre-screening;
the medium crushing crusher is used for performing medium crushing on the materials with the grain diameter of 40-80 mm stored in the semi-finished product bin;
the screening and adjusting bin is used for storing the crushed materials and the materials with the particle size smaller than 40mm prepared in the three-screen workshop;
the four-screen workshop is provided with three layers of screens, the screen hole sizes are respectively 40mm multiplied by 40mm, 20mm multiplied by 20mm and 5mm multiplied by 5mm, and the four-screen workshop is used for screening and grading the mixture discharged from the screening and adjusting bin;
and the sand making workshop is used for crushing and making sand for the materials with the particle size larger than 40mm, which are prepared in the four-screen workshop.
Optionally, the method further comprises:
a large stone finished product bin for storing large stone finished products with the grain diameter of 40-80 mm;
a middle Dan Chengpin bin, a middle Dan Chengpin bin is used for storing a middle Dan Cheng material with the grain diameter of 20-40 mm;
a small stone finished product bin used for storing a small stone finished product material with the particle size of 5-20 mm;
the natural sand silo is used for storing natural sand with the particle size of less than 5 mm;
the machine-made sand bin is used for storing machine-made sand with the grain diameter smaller than 5 mm;
and the finished product sand bin is used for storing the prepared finished product sand.
Optionally, the method further comprises:
the sewage treatment system is used for treating sewage generated by the stone washer, the sand washer and the dewatering screen.
Optionally, the method further comprises:
and the open type bin is used for storing the natural sand gravel raw material and conveying the natural sand gravel raw material to the pre-screening workshop.
Optionally, vibrating feeders are arranged between the open type bin and the pre-screening workshop, between the transfer bin and the secondary screening workshop, between the semi-finished product bin and the intermediate crusher, and between the screening adjusting bin and the four-screen workshop, and are used for feeding and conveying corresponding materials.
Optionally, a vertical shaft impact crusher is arranged in the sand making workshop, and the vertical shaft impact crusher is used for crushing the sand making.
The beneficial effect that this application can realize is as follows:
according to the method, firstly, a pre-screening process is adopted, natural gravel materials are divided into three parts, namely, oversize stones with the particle size larger than 80mm, large stone finished products with the particle size of 40-80 mm and natural materials with the particle size smaller than 40mm, and pre-screening is carried out in advance, so that the stone washing and sand washing water consumption in the subsequent links is reduced, and accordingly, the sewage treatment investment can also be reduced, wherein dry production, namely a processing process of three-stage crushing and two-time screening is adopted for the oversize stones with the particle size larger than 80mm, and medium stones, small stones and machine-made sand are prepared; the natural large stone with the grain size of 40-80 mm can be directly used as a large stone finished product material to be put into subsequent use, the natural material with the grain size of less than 40mm is produced by a wet method, namely, the processing technology of stone washing, sieving, sand washing and dehydration is adopted, and finally the medium stone, the small stone and the natural sand with the grain size of less than 5mm are respectively prepared, and the natural sand and the machine-made sand can be used as finished sand after being subsequently mixed according to the test proportion. The method adopts a dry-wet combined process, greatly solves the problems of large water consumption, large sewage treatment scale and the like caused by the production of the traditional wet process, and thus reduces the engineering investment to a certain extent.
Drawings
In order to more clearly illustrate the detailed description of the present application or the technical solutions in the prior art, the drawings that are needed in the detailed description of the present application or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic diagram of a frame structure of a processing system according to an embodiment of the present disclosure.
Reference numerals:
110-pre-screening workshop, 120-stone washer, 130-transfer bin, 140-two-screen workshop, 150-sand washer, 160-dewatering screen, 170-coarse crusher, 180-semi-finished product bin, 190-three-screen workshop, 210-medium crusher, 220-screening adjusting bin, 230-four-screen workshop, 240-sand making workshop, 250-large stone finished product bin, 260-medium Dan Chengpin bin, 270-small stone finished product bin, 280-natural sand bin, 290-machine-made sand bin, 310-finished sand bin, 320-open bin, 330-vibrating feeder, 340-sewage treatment system.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the present embodiment are only used to explain the relative position relationship between the components, the movement situation, and the like in a specific posture, and if the specific posture is changed, the directional indicator is changed accordingly.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the meaning of "and/or" appearing throughout includes three juxtapositions, exemplified by "A and/or B" including either A or B or both A and B. In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope claimed in the present application.
Example 1
The embodiment provides a sand and stone processing method based on natural sand and gravel, which comprises the following steps:
pre-screening the natural sand gravel raw material to respectively prepare an oversize stone material with the grain size of more than 80mm, a large stone finished product material with the grain size of 40-80 mm and a natural material with the grain size of less than 40 mm;
washing the natural material with the particle size of less than 40 mm;
screening and grading the natural material with the particle size of less than 40mm after stone washing to prepare a Dan Cheng material with the particle size of 20-40 mm, a small stone finished product material with the particle size of 5-20 mm and a sand material with the particle size of less than 5mm, and carrying out sand washing and dehydration treatment on the sand material with the particle size of less than 5mm to prepare natural sand;
coarsely crushing the oversize stone with the particle size of more than 80mm, then screening and grading to prepare a material with the particle size of 40-80 mm and a material with the particle size of less than 40mm, performing medium crushing on the material with the particle size of 40-80 mm, and then entering a screening adjustment link, wherein the material with the particle size of less than 40mm directly enters the screening adjustment link to form a mixture;
screening and grading the mixture after the screening and adjusting link to prepare a material with the particle size of more than 40mm, a medium Dan Cheng material with the particle size of 20-40 mm, a small stone finished product material with the particle size of 5-20 mm and a sand material with the particle size of less than 5mm, and feeding the material with the particle size of more than 40mm into a crushing and sand making link, wherein the sand material with the particle size of less than 5mm forms machine-made sand;
and mixing the prepared natural sand and the machine-made sand according to a proportion to prepare finished sand.
In the embodiment, a processing route of three-stage crushing (coarse crushing, medium crushing and sand making) and four-stage screening is generally adopted, firstly, a pre-screening process is adopted, natural sand gravel materials are divided into three parts, namely oversize stone materials with the grain size larger than 80mm, large stone finished products with the grain size of 40-80 mm and natural materials with the grain size smaller than 40mm, pre-screening is carried out for advanced classification, the water consumption for stone washing and sand washing in subsequent links is reduced, and correspondingly, the sewage treatment investment can also be reduced, wherein for the oversize stone materials with the grain size larger than 80mm, a dry production method, namely a processing process of three-stage crushing and two-stage screening is adopted to prepare medium stones, small stones and machine-made sand; the natural large stone with the grain size of 40-80 mm can be directly used as a large stone finished product material to be put into subsequent use (if the natural large stone is redundant, the redundant part adopts 'two-section crushing and one-time screening' to prepare medium stone, small stone and machine-made sand), the natural material with the grain size of less than 40mm is produced by a wet method, namely, the processing technology of stone washing, screening, sand washing and dehydration is used for finally respectively preparing the medium stone, the small stone and the natural sand with the grain size of less than 5mm, and the natural sand and the machine-made sand can be used as the finished sand after being subsequently mixed according to the test proportion. The method adopts a dry-wet combined process, greatly solves the problems of large water consumption, large sewage treatment scale and the like caused by the production of the traditional wet process, and thus reduces the engineering investment to a certain extent. According to the embodiment, on one hand, the whole water consumption is reduced, on the other hand, the phenomenon that no principle is mixed in the production process of the traditional machine-made sand and natural sand is changed, the machine-made sand is broken and ground, the produced coarse sand with larger fineness modulus is mixed with the natural sand according to the experimentally determined proportion, and the indexes such as the fineness modulus of the finished sand, the stone powder content and the like can be accurately controlled. Meanwhile, the sand making method adopts two routes, namely natural sand which is directly screened out and machine-made sand which is prepared by crushing, a part of natural sand is firstly screened out, the pressure of crushing equipment can be reduced during subsequent crushing sand making, and the load factor of the equipment is also reduced to a certain extent, thereby achieving two purposes.
It should be noted that the process route for washing stone, screening, washing sand and dehydrating the natural material with the particle size smaller than 40mm prepared by pre-screening and the process route for manufacturing machine-made sand by performing coarse crushing, three-screening, medium crushing and four-screening on the oversize stone with the particle size larger than 80mm prepared by pre-screening are performed simultaneously, and no front and back sequence exists.
The applicable boundary conditions of the present embodiment have the following characteristics:
(1) Processing the mother rock into natural sand gravel;
(2) The mud content of the natural sand gravel exceeds the standard, and the mud property does not contain sticky masses;
(3) Compared with the required grading, the natural grading of the natural sand gravel has higher contents of ultrapath stones and large stones, and the rest required particle size contents are generally insufficient;
(4) The fineness modulus of the natural sand is low, and the natural sand belongs to the category of fine sand or extra-fine sand;
(5) The product is mainly supplied with three-grade and two-grade mixed concrete.
As an optional implementation manner, after the screening and classifying the mixture after passing through the screening and adjusting step, the method further includes:
feeding the material with the particle size larger than 40mm into a crushing and sand making link;
and returning the products generated in the crushing and sand making link to the screening and adjusting link.
In the embodiment, the product generated in the crushing and sand making step can be returned to the screening and adjusting step to form a circulation closed loop of the screening and adjusting step, the screening and grading step, the crushing and sand making step and the screening and adjusting step, and through the formed circulation closed loop process route, the material with the particle size of more than 40mm can be repeatedly crushed and made into sand after the screening and grading step, so that the sand material with the particle size of less than 5mm can be fully prepared, the machine-made sand can be formed, and the condition of full utilization can be achieved.
As an alternative embodiment, in the step of pre-screening the natural sand gravel material to respectively prepare the oversize stone material with the grain size larger than 80mm, the large stone finished material with the grain size of 40-80 mm and the natural material with the grain size smaller than 40mm, if the large stone finished material with the grain size of 40-80 mm is redundant when the batch preparation amount is met, the redundant material enters a middle crushing link.
In the embodiment, the overall processing technology preferentially meets the preparation requirement of the large stone finished product, and after the preparation amount of the large stone finished product in a batch is reached according to the requirement of the processing technology, if the large stone finished product is redundant, the redundant material is screened and classified as a semi-finished product, namely, a dry processing technology of two-section crushing and one-time screening is adopted subsequently, and crushing and screening are combined to make up for the content defects of medium stones, small stones and sand in the natural material; the super-diameter stone obtained by pre-screening and grading is prepared into medium and small stones and machine-made sand by adopting a dry production process and three-stage crushing plus two-time screening.
As an optional implementation manner, the mixture after passing through the screening and adjusting step is screened and classified to prepare a material with a particle size larger than 40mm, a medium Dan Cheng material with a particle size of 20-40 mm, a small stone finished material with a particle size of 5-20 mm and a sand material with a particle size of less than 5mm, the material with a particle size larger than 40mm enters a crushing and sand making step, and in the step of forming the machine-made sand by the sand material with a particle size of less than 5mm, if the medium Dan Cheng material with a particle size of 20-40 mm and/or the small stone finished material with a particle size of 5-20 mm are/is redundant when the batch preparation amount is met, the redundant material enters the crushing and sand making step.
In the embodiment, similarly, in the processing process, if the finished medium-sized stone material with the particle size of 20-40 mm or the finished small-sized stone material with the particle size of 5-20 mm is excessive or both of the finished medium-sized stone material and the finished small-sized stone material are excessive, the excessive materials enter a crushing and sand making link to make up for the deficiency of the sand content.
Example 2
As shown in fig. 1, the present embodiment provides a processing system, which is used in the method for processing natural sand and gravel-based sand as described in embodiment 1, and comprises:
the pre-screening workshop 110 is provided with two layers of screens, the sizes of the screen holes are respectively 80mm multiplied by 80mm and 40mm multiplied by 40mm, and the pre-screening workshop 110 is used for pre-screening the natural sand gravel raw material;
the stone washer 120 is used for carrying out stone washing treatment on the natural material with the grain diameter smaller than 40mm, which is prepared by pre-screening;
the transfer bin 130, the transfer bin 130 is used for storing natural materials with the particle size smaller than 40mm after stone washing;
the secondary screening workshop 140 is provided with two layers of screens 140, the screen hole sizes are respectively 20mm multiplied by 20mm and 5mm multiplied by 5mm, and the secondary screening workshop 140 is used for screening and grading the natural materials with the particle size of less than 40mm after stone washing;
the sand washer 150 is used for carrying out sand washing treatment on the sand material with the particle size smaller than 5mm, which is prepared in the secondary screening workshop 140;
the dewatering screen 160, the dewatering screen 160 is used for dewatering the sand material with the particle size smaller than 5mm after the sand washing treatment;
a coarse crusher 170, wherein the coarse crusher 170 is used for coarsely crushing the over-diameter stone with the particle size of more than 80 mm;
the three-screen workshop 190, the three-screen workshop 190 is provided with a layer of screens, the screen hole size is 40 x 40mm, and the three-screen workshop 190 is used for screening and grading the coarse crushed products;
a semi-finished product bin 180, wherein the semi-finished product bin 180 is used for storing materials with the grain size of 40-80 mm prepared by the three-screen workshop 190 and redundant large stone finished products with the grain size of 40-80 mm prepared by pre-screening;
the medium crushing crusher 210, wherein the medium crushing crusher 210 is used for performing medium crushing on the material with the particle size of 40-80 mm stored in the semi-finished product bin 180;
a screening and adjusting bin 220, wherein the screening and adjusting bin 220 is used for storing the crushed materials and the materials with the particle size smaller than 40mm, which are prepared by the three-screen workshop 190;
the four-screen workshop 230 is provided with three layers of screens, the screen hole sizes of the three layers of screens are respectively 40mm multiplied by 40mm, 20mm multiplied by 20mm and 5mm multiplied by 5mm, and the four-screen workshop 230 is used for screening and grading the mixture discharged from the screening and adjusting bin 220;
and the sand making workshop 240 is used for crushing and making sand for the materials with the grain diameter of more than 40mm, which are made by the four-screen workshop 230.
In this embodiment, the functional components are reasonably arranged according to the process route, and the stone with an oversize diameter larger than 80mm, the large stone finished product material with a diameter of 40-80 mm and the natural material with a diameter of less than 40mm can be screened out through the pre-screening workshop 110, wherein the natural material with a diameter of less than 40mm sequentially enters the stone washer 120, the transit bunker 130, the secondary screening workshop 140, the sand washer 150 and the dewatering screen 160 to realize stone washing, screening, sand washing and dewatering, and medium and small stones and natural sand can be prepared; meanwhile, oversize stones with the particle size larger than 80mm are coarsely crushed by a coarse crusher 170 and enter a three-screen workshop 190, after screening and grading, large stones enter a semi-finished product bin 180, excessive large stone sand materials after pre-screening can be stored in the semi-finished product bin 180, sand materials in the semi-finished product bin 180 enter a middle crusher 210, middle crushed products and materials with the particle size smaller than 40mm prepared in the three-screen workshop 190 enter a screening adjusting bin 220 together to form mixed materials, the mixed materials discharged in the screening adjusting link enter a four-screen workshop 230, and therefore materials with the particle size larger than 40mm, middle Dan Cheng products with the particle size of 20-40 mm, small stone finished products with the particle size of 5-20 mm and sand materials with the particle size smaller than 5mm are prepared, the middle and small stones preferentially enter a corresponding finished product bin, after engineering requirements are met, the excessive parts and the materials with the particle size larger than 40mm enter a sand-making workshop 240 together, are crushed and then flow back to the screening adjusting bin 220 and circulate with the four-screen workshop 230 to prepare the mechanically-made sand with the particle size smaller than 5 mm. The production process is carried out according to the streamline process, so that finished products with different particle sizes can be prepared, the problems of large water consumption, large sewage treatment scale and the like caused by the traditional wet process production are greatly improved by reasonable layout and a dry-wet combination process, the load rate of equipment is reduced, and the engineering investment is reduced to a certain extent.
As an alternative embodiment, the coarse crusher 170 may be a jaw crusher, and the intermediate crusher 210 may be a cone crusher, which meets the requirement of use.
As an optional implementation manner, the method further includes:
the large stone finished product bin 250 is used for storing large stone finished products with the grain diameter of 40-80 mm;
a middle Dan Chengpin bin 260, a middle Dan Chengpin bin 260 is used for storing a middle Dan Cheng material with the grain diameter of 20-40 mm;
the small stone finished product bin 270, the small stone finished product bin 270 is used for storing small stone finished products with the grain diameter of 5-20 mm;
the natural sand silo 280, the natural sand silo 280 is used for storing natural sand with the grain diameter less than 5 mm;
the machine-made sand bin 290 is used for storing machine-made sand with the grain diameter smaller than 5 mm;
and the finished product sand bin 310 is used for storing the prepared finished product sand.
In the embodiment, the finished materials with different particle sizes produced in the processing process can be respectively stored in the corresponding large stone finished product bin 250, the middle Dan Chengpin bin 260, the small stone finished product bin 270, the natural sand bin 280 and the machine-made sand bin 290, the finished materials produced in the workshops can be conveyed to the corresponding bins through an automatic assembly line, so that industrial automatic production is realized, the corresponding sand materials in the natural sand bin 280 and the machine-made sand bin 290 can be mixed according to a proportion and then enter the finished product sand bin 310, and the natural sand and the machine-made sand are stored in separate bins, so that the blending proportion can be conveniently determined according to experiments in the later period, and the quality control of the finished sand is more facilitated.
As an optional implementation manner, the method further includes:
the sewage treatment system 340 and the sewage treatment system 340 are used for treating sewage generated by the stone washer 120, the sand washer 150 and the dewatering screen 160, and at the moment, the sewage treatment system 340 only needs to treat sewage generated by three nodes of the stone washer 120, the sand washer 150 and the dewatering screen 160, so that the sewage treatment capacity of the traditional wet process is obviously reduced.
As an optional implementation, the method further includes:
and an open silo 320, wherein the open silo 320 is used for storing the natural sand gravel raw material and conveying the natural sand gravel raw material to the pre-screening plant 110.
The transport vehicle can transport the mined natural sand gravel raw material to the open type storage bin 320, the open type storage bin 320 plays a storage role, and meanwhile, the open type storage bin 320 can continuously transport (is provided with a conveyor or other transport equipment) the natural sand gravel raw material to the pre-screening workshop 110, so that the raw material overstocking is avoided, and the fluidity and the continuity of the process line are kept.
As an optional embodiment, vibration feeders 330 are arranged between the open silo 320 and the pre-screening plant 110, between the transfer silo 130 and the secondary screening plant 140, between the semi-finished product silo 180 and the intermediate crusher 210, and between the screening adjustment silo 220 and the four-screen plant 230, and the vibration feeders 330 are used for feeding and conveying corresponding materials.
In this embodiment, the vibrating feeder 330 may be disposed in the conveying line of each link, so as to increase the flow conveying speed of the material, avoid overstock, and further improve the fluidity and continuity of the process line.
As an optional implementation manner, a vertical shaft impact crusher is arranged in the sand making workshop 240, and the vertical shaft impact crusher is used for crushing the made sand, so that the crushing effect is good.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings of the present application, or which are directly or indirectly applied to other related technical fields, are included in the scope of the present application.
Claims (10)
1. A sandstone processing method based on natural sand gravel is characterized by comprising the following steps:
pre-screening the natural sand gravel raw material to respectively prepare an oversize stone material with the grain size of more than 80mm, a large stone finished product material with the grain size of 40-80 mm and a natural material with the grain size of less than 40 mm;
washing the natural material with the particle size of less than 40 mm;
screening and grading the natural material with the particle size of less than 40mm after stone washing to prepare a Dan Cheng material with the particle size of 20-40 mm, a small stone finished product material with the particle size of 5-20 mm and a sand material with the particle size of less than 5mm, and carrying out sand washing and dehydration treatment on the sand material with the particle size of less than 5mm to prepare natural sand;
coarsely crushing the oversize stone with the grain size of more than 80mm, and then screening and grading to prepare a material with the grain size of 40-80 mm and a material with the grain size of less than 40 mm; the materials with the particle size of 40-80 mm are subjected to intermediate crushing and then enter a screening adjustment link, and the materials with the particle size of less than 40mm directly enter the screening adjustment link to form a mixture;
screening and grading the mixture after the screening and adjusting step to prepare a material with the particle size of more than 40mm, a medium Dan Cheng material with the particle size of 20-40 mm, a small stone finished product with the particle size of 5-20 mm and a sand material with the particle size of less than 5mm, wherein the sand material with the particle size of less than 5mm forms the machine-made sand;
and mixing the prepared natural sand and the machine-made sand according to a proportion to prepare finished sand.
2. A sand and stone processing method based on natural sand and gravel as claimed in claim 1, wherein after the mixture after passing through the screening and adjusting step is screened and graded, the method further comprises:
feeding the material with the particle size larger than 40mm into a crushing and sand making link;
and returning the product generated in the crushing and sand making step to the screening and adjusting step.
3. A natural sand and gravel-based sand and gravel processing method as claimed in claim 1, wherein in the step of pre-screening natural sand and gravel materials to respectively obtain oversize stones with a grain size of more than 80mm, large stone finished products with a grain size of 40-80 mm and natural stones with a grain size of less than 40mm, if the large stone finished products with a grain size of 40-80 mm are excessive when the batch preparation amount is satisfied, the excessive materials are fed into the intermediate crushing stage.
4. A sand and stone processing method based on natural sand and gravel as claimed in claim 1, characterized in that the mixture after passing through the screening and adjusting step is screened and classified to obtain a material with a particle size of more than 40mm, a medium Dan Cheng material with a particle size of 20-40 mm, a small stone finished material with a particle size of 5-20 mm and a sand material with a particle size of less than 5mm, the material with a particle size of more than 40mm is sent to the crushing and sand making step, and in the step of forming machine-made sand by the sand material with a particle size of less than 5mm, if the medium Dan Cheng material with a particle size of 20-40 mm and/or the small stone finished material with a particle size of 5-20 mm is/are excessive when the batch preparation amount is met, the excessive material is sent to the crushing and sand making step.
5. A processing system for a method of natural sand and gravel based sand processing as claimed in any one of claims 1 to 4, comprising:
the natural sand gravel pre-screening system comprises a pre-screening workshop, wherein the pre-screening workshop is provided with two layers of screens, the sizes of screen holes are respectively 80mm multiplied by 80mm and 40mm multiplied by 40mm, and the pre-screening workshop is used for pre-screening natural sand gravel raw materials;
the stone washer is used for carrying out stone washing treatment on the natural material with the grain diameter smaller than 40mm, which is prepared by pre-screening;
the transfer bin is used for storing the natural material with the particle size smaller than 40mm after stone washing;
the two-screen workshop is provided with two layers of screens, the sizes of screen holes are respectively 20mm multiplied by 20mm and 5mm multiplied by 5mm, and the two-screen workshop is used for screening and grading the natural materials with the particle size of less than 40mm after stone washing;
the sand washer is used for carrying out sand washing treatment on the sand material with the particle size smaller than 5mm prepared in the secondary screening workshop;
the dewatering screen is used for dewatering the sand material with the grain size smaller than 5mm after sand washing treatment;
the coarse crushing crusher is used for coarsely crushing the over-diameter stone with the particle size of more than 80 mm;
the three-screen workshop is provided with a layer of screens, the screen hole size is 40 multiplied by 40mm, and the three-screen workshop is used for screening and grading the coarse crushed products;
the semi-finished product bin is used for storing the materials with the grain size of 40-80 mm prepared in the three-screen workshop and the surplus large stone finished products with the grain size of 40-80 mm prepared by pre-screening;
the medium crushing crusher is used for performing medium crushing on the materials with the particle size of 40-80 mm stored in the semi-finished product bin;
the screening and adjusting bin is used for storing the crushed materials and the materials with the particle size smaller than 40mm prepared in the three-screen workshop;
the four-screen workshop is provided with three layers of screens, the screen hole sizes are respectively 40mm multiplied by 40mm, 20mm multiplied by 20mm and 5mm multiplied by 5mm, and the four-screen workshop is used for screening and grading the mixture discharged from the screening and adjusting bin;
and the sand making workshop is used for crushing and making sand for the materials with the particle size larger than 40mm, which are prepared by the four-screen workshop.
6. The tooling system of claim 5, further comprising:
the large stone finished product bin is used for storing large stone finished products with the grain size of 40-80 mm;
a middle Dan Chengpin bin, wherein the middle Dan Chengpin bin is used for storing a middle Dan Cheng material with the grain diameter of 20-40 mm;
a small stone finished product bin, wherein the small stone finished product bin is used for storing small stone finished products with the particle size of 5-20 mm;
the natural sand silo is used for storing natural sand with the particle size smaller than 5 mm;
the machine-made sand silo is used for storing machine-made sand with the particle size smaller than 5 mm;
and the finished product sand bin is used for storing the prepared finished product sand.
7. The tooling system of claim 5, further comprising:
and the sewage treatment system is used for treating the stone washer, the sand washer and sewage generated by the dewatering screen.
8. The tooling system of claim 5, further comprising:
an open silo for storing and transporting natural sand gravel feedstock to the pre-screening plant.
9. The processing system according to claim 8, wherein vibrating feeders are arranged between the open silo and the pre-screening workshop, between the intermediate silo and the two-screen workshop, between the semi-finished silo and the intermediate crusher, and between the screening adjusting silo and the four-screen workshop, and are used for feeding and conveying corresponding materials.
10. The processing system as claimed in claim 5, wherein a vertical shaft impact crusher is provided in the sand plant for crushing the sand.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202211245250.2A CN115608609A (en) | 2022-10-12 | 2022-10-12 | Sandstone processing method and system based on natural sand gravel |
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| CN202211245250.2A CN115608609A (en) | 2022-10-12 | 2022-10-12 | Sandstone processing method and system based on natural sand gravel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116037294A (en) * | 2023-02-14 | 2023-05-02 | 中国电建集团成都勘测设计研究院有限公司 | Production process and production system for reducing mica content in machine-made sand |
| CN116237110A (en) * | 2023-02-27 | 2023-06-09 | 中铁四局集团有限公司 | Hole slag preparation fine machine-made sand production process method based on full-flow management |
-
2022
- 2022-10-12 CN CN202211245250.2A patent/CN115608609A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116037294A (en) * | 2023-02-14 | 2023-05-02 | 中国电建集团成都勘测设计研究院有限公司 | Production process and production system for reducing mica content in machine-made sand |
| CN116237110A (en) * | 2023-02-27 | 2023-06-09 | 中铁四局集团有限公司 | Hole slag preparation fine machine-made sand production process method based on full-flow management |
| CN116237110B (en) * | 2023-02-27 | 2024-03-19 | 中铁四局集团有限公司 | Hole slag preparation fine machine-made sand production process method based on full-flow management |
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