CN111135932A - Machine-made sand and stone secondary crushing and secondary screening production process - Google Patents
Machine-made sand and stone secondary crushing and secondary screening production process Download PDFInfo
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- CN111135932A CN111135932A CN201911355793.8A CN201911355793A CN111135932A CN 111135932 A CN111135932 A CN 111135932A CN 201911355793 A CN201911355793 A CN 201911355793A CN 111135932 A CN111135932 A CN 111135932A
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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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- 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
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize 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
- B02C23/16—Separating or sorting of material, associated with crushing or disintegrating with separator defining termination of crushing or disintegrating zone, e.g. screen denying egress of oversize material
- B02C2023/165—Screen denying egress of oversize material
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- Disintegrating Or Milling (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention discloses a machine-made sand and stone secondary crushing and secondary screening production process, which relates to the field of sand and stone production processes and comprises a primary crushing process, a secondary crushing process, a primary screening process, a secondary screening process, a circulating process, a material distributing process, a powder selecting process and a sand washing process. The invention has the beneficial effects that: the invention has the advantages of dry production and wet production, and can adapt to various complex working conditions such as rainy south and frozen north in winter; the invention is convenient to adjust the powder content in the product and can meet the requirements of different products; the process can simultaneously produce different products such as dry method, wet method and the like, and the proportion of each product can be adjusted according to actual conditions, so that the production management is convenient; compared with the traditional dry method, the method has less dust and is more environment-friendly.
Description
Technical Field
The invention relates to the field of sandstone production processes, in particular to a second-breaking and second-screening production process for machine-made sandstone.
Background
When the traditional dry-method mechanism sand production process is used for treating products with high humidity and much mud, the ore discharge port of the crusher is easily blocked by wet materials, so that the production stability is influenced, and the process is easy to cause production fluctuation in regions with rich rainwater, such as the south and the like; on the other hand, the traditional dry production process is difficult to adjust the powder content in the sand, so that the powder content in the sand is easy to exceed the standard.
When the traditional wet-method mechanism sandstone production process meets cold weather in winter in the north, the condition of icing and blocking sieve pores is easy to occur, so that unsmooth production is caused, and the production stability is influenced.
The traditional dry method and wet method production processes have self limitations, cannot be well adapted to various complex working conditions, can generate unsmooth production under some working conditions, and influence the production stability.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a machine-made sand and stone secondary crushing and secondary screening production process, has the advantages of dry production and wet production, and can adjust the proportion of products according to actual conditions.
The purpose of the invention is achieved by the following technical scheme: the second-crushing and second-screening production process of the machine-made sand comprises the following steps of:
step one, a first crushing procedure: crushing the ore by a primary crusher to obtain a product a after primary crushing;
step two, a second crushing procedure: performing secondary crushing on the product a obtained in the step one by using a secondary crusher to obtain a product b after secondary crushing;
step three, a first screening process: screening the product b obtained in the second step through a primary screening device to obtain a product c1 positioned on the upper layer of the device and a product c2 positioned on the lower layer of the device;
step four, a second screening process: performing secondary screening on the product c2 obtained in the step three through secondary screening equipment to obtain products d1, d2 and d3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the equipment;
step five, a circulating procedure: returning the product c1 obtained in the step three to the step two, and repeating the operations of the step two and the step three;
step six, a material distribution process: distributing the product d3 obtained in the step four through distribution equipment according to the required weight ratio to obtain products e1 and e 2;
step seven, a powder selecting procedure: selecting powder from the product e1 obtained in the sixth step by powder selection equipment to obtain products f1 and f 2;
step eight, a sand washing procedure: and (5) washing the product e2 obtained in the sixth step by using a sand washing device to obtain products g1 and g 2.
Further, the primary and secondary crushers in the step one are one or more of a gyratory crusher, a jaw crusher, a hammer crusher and an impact crusher; the diameter of the product a is less than 200 mm.
Further, the secondary crusher in the second step is one or more of a cone crusher, a jaw crusher, a hammer crusher and an impact crusher; the diameter of the product b is less than 100 mm.
Further, the primary screening equipment in the third step is one or two of a linear screen, a circular vibration screen, a resonance screen and a probability screen; the primary screening equipment is a single-layer screen, and the diameter of a screen hole is 25-80 mm.
Further, the secondary screening equipment in the fourth step is one or two of a linear screen, a circular vibration screen, a resonance screen and a probability screen; the secondary screening equipment is a double-layer screen, the diameter of an upper-layer screen hole is 10-75 mm, and the diameter of a lower-layer screen hole is 3-45 mm.
And further, the material distribution equipment in the sixth step is one or two of a material distribution hopper and a material storage bin.
And further, the powder selecting equipment in the seventh step is one or more of a powder selecting machine, an air classifier and a sieve.
And furthermore, the sand washing equipment in the step eight is one or more of a sand washing machine, a sieve, a hydrocyclone and a spiral classifier.
The invention has the beneficial effects that:
1. the invention has the advantages of dry production and wet production, and can adapt to various complex working conditions such as rainy south and frozen north in winter;
2. the invention is convenient to adjust the powder content in the product and can meet the requirements of different products;
3. the process can simultaneously produce different products such as dry method, wet method and the like, and the proportion of each product can be adjusted according to actual conditions, so that the production management is convenient;
4. compared with the traditional dry method, the method has less dust and is more environment-friendly.
Drawings
FIG. 1 is a block diagram of the process flow of the present invention.
Detailed Description
Example 1: the second-crushing and second-screening production process for machine-made gravels comprises the following steps of:
step one, a first crushing procedure: crushing the ore by a cone crusher to obtain a product a after primary crushing, wherein the diameter of the product a is less than 180 mm;
step two, a second crushing procedure: performing secondary crushing on the product a obtained in the step one by using a cone crusher to obtain a product b after secondary crushing, wherein the diameter of the product b is less than 80 mm;
step three, a first screening process: screening the product b obtained in the step two through a circular vibrating screen, wherein the size of a screen hole is 35mm, and obtaining a product c1 on the upper layer of the circular vibrating screen and a product c2 on the lower layer;
step four, a second screening process: sieving the product c2 obtained in the third step for the second time through a double-layer linear sieve with 15mm mesh at the upper layer and 4.75mm mesh at the lower layer to obtain products d1, d2 and d3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step five, a circulating procedure: returning the product c1 obtained in the step three to the step two, and repeating the operations of the step two and the step three;
step six, a material distribution process: distributing the product d3 obtained in the step four through a distribution hopper according to the weight ratio of 1:1 to obtain products e1 and e 2;
step seven, a powder selecting procedure: selecting powder from the product e1 obtained in the sixth step by a powder selecting machine to obtain products f1 and f2, wherein the powder content of the product f2 is less than 10%;
step eight, a sand washing procedure: washing the product e2 obtained in the sixth step with a sand washer to obtain products g1 and g 2;
the products d1, d2, f2 and g2 are 4 products, the yield of the dry sand f2 is equal to that of the wet sand g2, and the powder content of the dry sand f2 is less than 10%.
Example 2: the second-crushing and second-screening production process for machine-made gravels comprises the following steps of:
step one, a first crushing procedure: crushing the ore by a jaw crusher to obtain a product a after primary crushing, wherein the diameter of the product a is less than 170 mm;
step two, a second crushing procedure: performing secondary crushing on the product a obtained in the step one by using a cone crusher to obtain a product b after secondary crushing, wherein the diameter of the product b is less than 65 mm;
step three, a first screening process: screening the product b obtained in the step two through a circular vibrating screen, wherein the size of a screen hole is 38mm, and obtaining a product c1 on the upper layer of the circular vibrating screen and a product c2 on the lower layer;
step four, a second screening process: screening the product c2 obtained in the third step for the second time through a double-layer linear sieve with 15mm mesh at the upper layer and 5mm mesh at the lower layer to obtain products d1, d2 and d3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step five, a circulating procedure: returning the product c1 obtained in the step three to the step two, and repeating the operations of the step two and the step three;
step six, a material distribution process: distributing the product d3 obtained in the step four through a distribution hopper according to the weight ratio of 1:2 to obtain products e1 and e 2;
step seven, a powder selecting procedure: selecting powder from the product e1 obtained in the sixth step by an air classifier to obtain products f1 and f2, wherein the powder content of the product f2 is less than 15%;
step eight, a sand washing procedure: washing sand of the product e2 obtained in the sixth step by a spiral classifier to obtain products g1 and g 2;
the products d1, d2, f2 and g2 are 4 products, the yield of the dry sand f2 and the yield of the wet sand g2 in the embodiment are 1:2, and the powder content of the dry sand f2 is less than 15%.
Example 3: the second-crushing and second-screening production process for machine-made gravels comprises the following steps of:
step one, a first crushing procedure: crushing the ore by a hammer crusher to obtain a product a after primary crushing, wherein the diameter of the product a is less than 150 mm;
step two, a second crushing procedure: performing secondary crushing on the product a obtained in the step one by using a cone crusher to obtain a product b after secondary crushing, wherein the diameter of the product b is less than 45 mm;
step three, a first screening process: screening the product b obtained in the step two through a circular vibrating screen, wherein the size of a screen hole is 40mm, and obtaining a product c1 on the upper layer of the circular vibrating screen and a product c2 on the lower layer;
step four, a second screening process: sieving the product c2 obtained in the third step for the second time through a double-layer linear sieve with 15mm mesh at the upper layer and 4.75mm mesh at the lower layer to obtain products d1, d2 and d3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step five, a circulating procedure: returning the product c1 obtained in the step three to the step two, and repeating the operations of the step two and the step three;
step six, a material distribution process: distributing the product d3 obtained in the step four through a distribution hopper according to the weight ratio of 2:1 to obtain products e1 and e 2;
step seven, a powder selecting procedure: selecting powder from the product e1 obtained in the sixth step by a powder selecting machine to obtain products f1 and f2, wherein the powder content of the product f2 is less than 8%;
step eight, a sand washing procedure: washing the product e2 obtained in the sixth step with a sand washer to obtain products g1 and g 2;
the products d1, d2, f2 and g2 are 4 products, the yield of the dry sand f2 and the yield of the wet sand g2 in the embodiment are 2:1, and the powder content of the dry sand f2 is less than 8%.
Example 4: the second-crushing and second-screening production process for machine-made gravels comprises the following steps of:
step one, a first crushing procedure: crushing the ore by a hammer crusher to obtain a product a after primary crushing, wherein the diameter of the product a is less than 120 mm;
step two, a second crushing procedure: performing secondary crushing on the product a obtained in the step one by using a jaw crusher to obtain a product b after secondary crushing, wherein the diameter of the product b is less than 40 mm;
step three, a first screening process: screening the product b obtained in the step two through a circular vibrating screen, wherein the size of a screen hole is 30mm, and obtaining a product c1 on the upper layer of the circular vibrating screen and a product c2 on the lower layer;
step four, a second screening process: sieving the product c2 obtained in the third step for the second time through a double-layer linear sieve with 12mm upper-layer sieve holes and 4.75mm lower-layer sieve holes to obtain products d1, d2 and d3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step five, a circulating procedure: returning the product c1 obtained in the step three to the step two, and repeating the operations of the step two and the step three;
step six, a material distribution process: distributing the product d3 obtained in the step four through a distribution hopper according to the weight ratio of 4:1 to obtain products e1 and e 2;
step seven, a powder selecting procedure: selecting powder from the product e1 obtained in the sixth step by an air classifier to obtain products f1 and f2, wherein the powder content of the product f2 is less than 5%;
step eight, a sand washing procedure: washing the product e2 obtained in the sixth step with a sand washer to obtain products g1 and g 2;
the products d1, d2, f2 and g2 are 4 products, the yield of the dry sand f2 is equal to that of the wet sand g2, and the powder content of the dry sand f2 is less than 5%.
Example 5: the second-crushing and second-screening production process for machine-made gravels comprises the following steps of:
step one, a first crushing procedure: crushing the ore by a jaw crusher to obtain a product a after primary crushing, wherein the diameter of the product a is less than 150 mm;
step two, a second crushing procedure: performing secondary crushing on the product a obtained in the step one by using a cone crusher to obtain a product b after secondary crushing, wherein the diameter of the product b is less than 45 mm;
step three, a first screening process: screening the product b obtained in the step two through a circular vibrating screen, wherein the size of a screen hole is 37mm, and obtaining a product c1 on the upper layer of the circular vibrating screen and a product c2 on the lower layer;
step four, a second screening process: screening the product c2 obtained in the third step for the second time through a double-layer linear sieve with the upper layer sieve pore of 20mm and the lower layer sieve pore of 5mm to obtain products d1, d2 and d3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step five, a circulating procedure: returning the product c1 obtained in the step three to the step two, and repeating the operations of the step two and the step three;
step six, a material distribution process: distributing the product d3 obtained in the step four through a distribution hopper according to the weight ratio of 1:5 to obtain products e1 and e 2;
step seven, a powder selecting procedure: selecting powder from the product e1 obtained in the sixth step by a powder selecting machine to obtain products f1 and f2, wherein the powder content of the product f2 is less than 5%;
step eight, a sand washing procedure: washing sand of the product e2 obtained in the sixth step by a spiral classifier to obtain products g1 and g 2;
the products d1, d2, f2 and g2 are 4 products, the yield of the dry sand f2 and the yield of the wet sand g2 in the embodiment are 1:5, and the powder content of the dry sand f2 is less than 5%.
According to the embodiment, the powder content in the product can be conveniently adjusted, and different product requirements can be met; the invention can produce different products such as dry method, wet method, etc. at the same time, the proportion of each product can be adjusted according to the actual situation, is convenient for production management; compared with the traditional dry method, the method has less dust and is more environment-friendly; can be widely popularized and applied to the sandstone production field.
It should be understood that equivalent substitutions and changes to the technical solution and the inventive concept of the present invention should be made by those skilled in the art to the protection scope of the appended claims.
Claims (8)
1. A machine-made sand and stone secondary crushing and secondary screening production process is characterized in that: the method comprises the following steps:
step one, a first crushing procedure: crushing the ore by a primary crusher to obtain a product a after primary crushing;
step two, a second crushing procedure: performing secondary crushing on the product a obtained in the step one by using a secondary crusher to obtain a product b after secondary crushing;
step three, a first screening process: screening the product b obtained in the second step through a primary screening device to obtain a product c1 positioned on the upper layer of the device and a product c2 positioned on the lower layer of the device;
step four, a second screening process: performing secondary screening on the product c2 obtained in the step three through secondary screening equipment to obtain products d1, d2 and d3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the equipment;
step five, a circulating procedure: returning the product c1 obtained in the step three to the step two, and repeating the operations of the step two and the step three;
step six, a material distribution process: distributing the product d3 obtained in the step four through distribution equipment according to the required weight ratio to obtain products e1 and e 2;
step seven, a powder selecting procedure: selecting powder from the product e1 obtained in the sixth step by powder selection equipment to obtain products f1 and f 2;
step eight, a sand washing procedure: and (5) washing the product e2 obtained in the sixth step by using a sand washing device to obtain products g1 and g 2.
2. The machine-made sand secondary crushing and screening production process as claimed in claim 1, wherein the machine-made sand secondary crushing and screening production process comprises the following steps: the primary and secondary crushers in the step one are one or more of a gyratory crusher, a jaw crusher, a hammer crusher and a counterattack crusher; the diameter of the product a is less than 200 mm.
3. The machine-made sand secondary crushing and screening production process as claimed in claim 1, wherein the machine-made sand secondary crushing and screening production process comprises the following steps: the secondary crusher in the step two is one or more of a cone crusher, a jaw crusher, a hammer crusher and a counterattack crusher; the diameter of the product b is less than 100 mm.
4. The machine-made sand secondary crushing and screening production process as claimed in claim 1, wherein the machine-made sand secondary crushing and screening production process comprises the following steps: the primary screening equipment in the step three is one or two of a linear screen, a circular vibration screen, a resonance screen and a probability screen; the primary screening equipment is a single-layer screen, and the diameter of a screen hole is 25-80 mm.
5. The machine-made sand secondary crushing and screening production process as claimed in claim 1, wherein the machine-made sand secondary crushing and screening production process comprises the following steps: the secondary screening equipment in the step four is one or two of a linear screen, a circular vibration screen, a resonance screen and a probability screen; the secondary screening equipment is a double-layer screen, the diameter of an upper-layer screen hole is 10-75 mm, and the diameter of a lower-layer screen hole is 3-45 mm.
6. The machine-made sand secondary crushing and screening production process as claimed in claim 1, wherein the machine-made sand secondary crushing and screening production process comprises the following steps: and sixthly, the material distribution equipment is one or two of a material distribution hopper and a material bin.
7. The machine-made sand secondary crushing and screening production process as claimed in claim 1, wherein the machine-made sand secondary crushing and screening production process comprises the following steps: and seventhly, the powder selecting equipment is one or more of a powder selecting machine, an air classifier and a sieve.
8. The machine-made sand secondary crushing and screening production process as claimed in claim 1, wherein the machine-made sand secondary crushing and screening production process comprises the following steps: and step eight, the sand washing equipment is one or more of a sand washing machine, a sieve, a hydrocyclone and a spiral classifier.
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| CN201911355793.8A CN111135932A (en) | 2019-12-25 | 2019-12-25 | Machine-made sand and stone secondary crushing and secondary screening production process |
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Application publication date: 20200512 |
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