CN111135931A - Three-crushing two-screening production process for machine-made sandstone - Google Patents
Three-crushing two-screening production process for machine-made sandstone Download PDFInfo
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- CN111135931A CN111135931A CN201911355785.3A CN201911355785A CN111135931A CN 111135931 A CN111135931 A CN 111135931A CN 201911355785 A CN201911355785 A CN 201911355785A CN 111135931 A CN111135931 A CN 111135931A
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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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Abstract
The invention discloses a three-crushing two-screening production process for machine-made gravels, which relates to the field of gravel production processes and mainly comprises a first crushing process, a second crushing process, a third crushing process, a first screening process, a second 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 three-crushing two-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 three-crushing two-screening production process for machine-made sandstone, 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 three-crushing two-screening production process of the machine-made sand 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 third crushing procedure: carrying out third crushing on the product b obtained in the step two by using a third crusher to obtain a product c after the third crushing;
step four, a first screening process: screening the product c obtained in the third step by primary screening equipment to obtain a product d1 positioned at the upper layer of the equipment and a product d2 positioned at the lower layer of the equipment;
step five, a second screening process: performing secondary screening on the product d2 obtained in the step four through secondary screening equipment to obtain products e1, e2 and e3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the equipment;
step six, a circulating procedure: returning the product d1 obtained in the step four to the step three, and repeating the operation of the step three and the operation of the step four;
step seven, a material distributing process: distributing the product e3 obtained in the fifth step by using distribution equipment according to the required weight ratio to obtain products f1 and f 2;
step eight, a powder selecting procedure: selecting powder from the product f1 obtained in the step seven through powder selection equipment to obtain products g1 and g 2;
ninth, sand washing procedure: and washing sand of the product f2 obtained in the step seven by using sand washing equipment to obtain products h1 and h 2.
Further, the primary crusher in the step one is 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 350 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 third crusher in the third step is one or more of a cone crusher, a jaw crusher, a hammer crusher and an impact crusher; the diameter of the product c is less than 90 mm.
Further, the primary 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 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 fifth 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 seventh step is one or two of a material distribution hopper and a material storage bin.
And further, the powder selecting equipment in the step eight is one or more of a powder selecting machine, an air classifier and a sieve.
And furthermore, the sand washing equipment in the ninth step 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 machine-made sandstone three-crushing two-screening production process comprises the following steps:
step one, a first crushing procedure: crushing the ore by a gyratory crusher to obtain a product a after primary crushing, wherein the diameter of the product a is less than 280 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 third crushing procedure: crushing the product b obtained in the step two for the third time by using a cone crusher to obtain a product c after the third crushing, wherein the diameter of the product c is less than 50 mm;
step four, a first screening process: screening the product c obtained in the third step through a circular vibrating screen, wherein the size of a screen hole is 35mm, and obtaining a product d1 on the upper layer of the circular vibrating screen and a product d2 on the lower layer;
step five, a second screening process: sieving the product d2 obtained in the fourth 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 e1, e2 and e3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step six, a circulating procedure: returning the product d1 obtained in the step four to the step three, and repeating the operations of the step three and the step four;
step seven, a material distributing process: distributing the product e3 obtained in the fifth step according to the weight ratio of 1:1 through a distribution hopper to obtain products f1 and f 2;
step eight, a powder selecting procedure: selecting the product f1 obtained in the seventh step by a powder selecting machine to obtain products g1 and g2, wherein the powder content of the product g2 is less than 10%;
ninth, sand washing procedure: washing the product f2 obtained in the seventh step by a sand washer to obtain products h1 and h 2;
the products e1, e2, g2 and h2 are 4 products, the yield of the dry sand g2 is equal to that of the wet sand h2, and the powder content of the dry sand g2 is less than 10%.
Example 2: the machine-made sandstone three-crushing two-screening production process comprises the following steps:
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 250 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 75 mm;
step three, a third crushing procedure: crushing the product b obtained in the step two for the third time by using a cone crusher to obtain a product c after the third crushing, wherein the diameter of the product c is less than 45 mm;
step four, a first screening process: screening the product c obtained in the third step through a circular vibrating screen, wherein the size of a screen hole is 38mm, and obtaining a product d1 on the upper layer of the circular vibrating screen and a product d2 on the lower layer;
step five, a second screening process: screening the product d2 obtained in the fourth 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 e1, e2 and e3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step six, a circulating procedure: returning the product d1 obtained in the step four to the step three, and repeating the operations of the step three and the step four;
step seven, a material distributing process: distributing the product e3 obtained in the fifth step according to the weight ratio of 1:2 through a distribution hopper to obtain products f1 and f 2;
step eight, a powder selecting procedure: selecting powder from the product f1 obtained in the seventh step by an air classifier to obtain products g1 and g2, wherein the powder content of the product g2 is less than 15%;
ninth, sand washing procedure: washing sand of the product f2 obtained in the seventh step by a spiral classifier to obtain products h1 and h 2;
the products e1, e2, g2 and h2 are 4 products, the yield of the dry sand g2 and the yield of the wet sand h2 in the embodiment are 1:2, and the powder content of the dry sand g2 is less than 15%.
Example 3: the machine-made sandstone three-crushing two-screening production process comprises the following steps:
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 270 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 third crushing procedure: crushing the product b obtained in the step two for the third time by using a cone crusher to obtain a product c after the third crushing, wherein the diameter of the product c is less than 45 mm;
step four, a first screening process: screening the product c obtained in the third step through a circular vibrating screen, wherein the size of a screen hole is 40mm, and obtaining a product d1 on the upper layer of the circular vibrating screen and a product d2 on the lower layer;
step five, a second screening process: sieving the product d2 obtained in the fourth 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 e1, e2 and e3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step six, a circulating procedure: returning the product d1 obtained in the step four to the step three, and repeating the operations of the step three and the step four;
step seven, a material distributing process: distributing the product e3 obtained in the fifth step according to the weight ratio of 2:1 through a distribution hopper to obtain products f1 and f 2;
step eight, a powder selecting procedure: selecting the product f1 obtained in the seventh step by a powder selecting machine to obtain products g1 and g2, wherein the powder content of the product g2 is less than 8%;
ninth, sand washing procedure: washing the product f2 obtained in the seventh step by a sand washer to obtain products h1 and h 2;
the products e1, e2, g2 and h2 are 4 products, the yield of the dry sand g2 and the yield of the wet sand h2 in the embodiment are 2:1, and the powder content of the dry sand g2 is less than 8%.
Example 4: the machine-made sandstone three-crushing two-screening production process comprises the following steps:
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 250 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 60 mm;
step three, a third crushing procedure: performing third crushing on the product b obtained in the step two through a cone crusher to obtain a product c after the third crushing, wherein the diameter of the product c is less than 40 mm;
step four, a first screening process: screening the product c obtained in the third step by using a circular vibrating screen, wherein the size of a screen hole is 30mm, and obtaining a product d1 positioned on the upper layer of the circular vibrating screen and a product d2 positioned on the lower layer;
step five, a second screening process: sieving the product d2 obtained in the fourth 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 e1, e2 and e3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step six, a circulating procedure: returning the product d1 obtained in the step four to the step three, and repeating the operations of the step three and the step four;
step seven, a material distributing process: distributing the product e3 obtained in the fifth step through a distribution hopper according to the weight ratio of 4:1 to obtain products f1 and f 2;
step eight, a powder selecting procedure: selecting powder from the product f1 obtained in the seventh step by an air classifier to obtain products g1 and g2, wherein the powder content of the product g2 is less than 5%;
ninth, sand washing procedure: washing the product f2 obtained in the seventh step by a sand washer to obtain products h1 and h 2;
the products e1, e2, g2 and h2 are 4 products, the yield of the dry sand g2 and the yield of the wet sand h2 in the embodiment are 4:1, and the powder content of the dry sand g2 is less than 5%.
Example 5: the machine-made sandstone three-crushing two-screening production process comprises the following steps:
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 260 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 70 mm;
step three, a third crushing procedure: crushing the product b obtained in the step two for the third time by using a cone crusher to obtain a product c after the third crushing, wherein the diameter of the product c is less than 50 mm;
step four, a first screening process: screening the product c obtained in the third step by using a circular vibrating screen, wherein the size of a screen hole is 37mm, and obtaining a product d1 positioned on the upper layer of the circular vibrating screen and a product d2 positioned on the lower layer;
step five, a second screening process: sieving the product d2 obtained in the fourth 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 e1, e2 and e3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step six, a circulating procedure: returning the product d1 obtained in the step four to the step three, and repeating the operations of the step three and the step four;
step seven, a material distributing process: distributing the product e3 obtained in the fifth step according to the weight ratio of 1:5 through a distribution hopper to obtain products f1 and f 2;
step eight, a powder selecting procedure: selecting the product f1 obtained in the seventh step by a powder selecting machine to obtain products g1 and g2, wherein the powder content of the product g2 is less than 5%;
ninth, sand washing procedure: washing sand of the product f2 obtained in the seventh step by a spiral classifier to obtain products h1 and h 2;
the products e1, e2, g2 and h2 are 4 products, the yield of the dry sand g2 and the yield of the wet sand h2 in the embodiment are 1:5, and the powder content of the dry sand g2 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 (9)
1. A three-crushing two-screening production process for machine-made sand stones is characterized by comprising the following steps of: 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 third crushing procedure: carrying out third crushing on the product b obtained in the step two by using a third crusher to obtain a product c after the third crushing;
step four, a first screening process: screening the product c obtained in the third step by primary screening equipment to obtain a product d1 positioned at the upper layer of the equipment and a product d2 positioned at the lower layer of the equipment;
step five, a second screening process: performing secondary screening on the product d2 obtained in the step four through secondary screening equipment to obtain products e1, e2 and e3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the equipment;
step six, a circulating procedure: returning the product d1 obtained in the step four to the step three, and repeating the operation of the step three and the operation of the step four;
step seven, a material distributing process: distributing the product e3 obtained in the fifth step by using distribution equipment according to the required weight ratio to obtain products f1 and f 2;
step eight, a powder selecting procedure: selecting powder from the product f1 obtained in the step seven through powder selection equipment to obtain products g1 and g 2;
ninth, sand washing procedure: and washing sand of the product f2 obtained in the step seven by using sand washing equipment to obtain products h1 and h 2.
2. The machine-made sand three-crushing two-screening production process as claimed in claim 1, wherein the machine-made sand three-crushing two-screening production process comprises the following steps: the primary crusher in the step one is 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 350 mm.
3. The machine-made sand three-crushing two-screening production process as claimed in claim 1, wherein the machine-made sand three-crushing two-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 three-crushing two-screening production process as claimed in claim 1, wherein the machine-made sand three-crushing two-screening production process comprises the following steps: the third-time crusher is one or more of a cone crusher, a jaw crusher, a hammer crusher and a counterattack crusher; the diameter of the product c is less than 90 mm.
5. The machine-made sand three-crushing two-screening production process as claimed in claim 1, wherein the machine-made sand three-crushing two-screening production process comprises the following steps: the primary 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 primary screening equipment is a single-layer screen, and the diameter of a screen hole is 25-80 mm.
6. The machine-made sand three-crushing two-screening production process as claimed in claim 1, wherein the machine-made sand three-crushing two-screening production process comprises the following steps: fifthly, the secondary screening equipment 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.
7. The machine-made sand three-crushing two-screening production process as claimed in claim 1, wherein the machine-made sand three-crushing two-screening production process comprises the following steps: and seventhly, the material distribution equipment is one or two of a material distribution hopper and a material bin.
8. The machine-made sand three-crushing two-screening production process as claimed in claim 1, wherein the machine-made sand three-crushing two-screening production process comprises the following steps: and step eight, the powder selecting equipment is one or more of a powder selecting machine, an air classifier and a sieve.
9. The machine-made sand three-crushing two-screening production process as claimed in claim 1, wherein the machine-made sand three-crushing two-screening production process comprises the following steps: and ninthly, 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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