CN111135928A - Three-crushing three-screening circulating production process for machine-made gravel - Google Patents
Three-crushing three-screening circulating production process for machine-made gravel Download PDFInfo
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- CN111135928A CN111135928A CN201911355760.3A CN201911355760A CN111135928A CN 111135928 A CN111135928 A CN 111135928A CN 201911355760 A CN201911355760 A CN 201911355760A CN 111135928 A CN111135928 A CN 111135928A
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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 three-screening circulating production process for machine-made gravel, which relates to the field of gravel production processes and mainly comprises a first crushing process, a second crushing process, a first screening process, a third crushing process, a second screening process, a circulating process, a third screening 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 three-screening circulating 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 three-screening circular 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 three-screening circulating 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 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 third crushing procedure: thirdly crushing the product c1 obtained in the third step by a tertiary crusher to obtain a product d after the third crushing;
step five, a second screening process: performing secondary screening on the product d obtained in the step four through secondary screening equipment to obtain a product e1 located at the upper layer of the equipment and a product e2 located at the lower layer of the equipment;
step six, a circulating procedure: returning the product e1 obtained in the step five to the step four, and repeating the operations of the step four and the step five;
step seven, a third screening process: thirdly screening the product e2 obtained in the fifth step and the product c2 obtained in the third step through tertiary screening equipment to obtain products f1, f2 and f3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the equipment;
step eight, a material distribution process: distributing the product f3 obtained in the step seven through distribution equipment according to the required weight ratio to obtain products g1 and g 2;
step nine, a powder selecting process: selecting powder from the product g1 obtained in the step eight by powder selecting equipment to obtain products h1 and h 2;
step ten, sand washing procedure: and (5) washing the product g2 obtained in the step eight by using a sand washing device to obtain products i1 and i 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 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 third crusher in the fourth step is one or more of a cone crusher, a jaw crusher, a hammer crusher and an impact crusher; the diameter of the product d is less than 90 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 single-layer screen, and the diameter of each screen hole is 20-80 mm.
Further, the third screening equipment in the seventh step is one or two of a linear screen, a circular vibration screen, a resonance screen and a probability screen; the tertiary 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 step eight is one or two of a material distribution hopper and a material storage bin.
And further, the powder selecting equipment in the ninth step is one or more of a powder selecting machine, an air classifier and a sieve.
Furthermore, the sand washing equipment in the step ten 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 three-crushing three-screening circulating production process for machine-made sandstone 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 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 third crushing procedure: thirdly crushing the product c1 obtained in the third step by using a cone crusher to obtain a product d after the third crushing, wherein the diameter of the product d is less than 50 mm;
step five, a second screening process: screening the product d obtained in the fourth step for the second time through a circular vibrating screen, wherein the size of a screen hole is 35mm, and obtaining a product e1 on the upper layer of the circular vibrating screen and a product e2 on the lower layer;
step six, a circulating procedure: returning the product e1 obtained in the step five to the step four, and repeating the operations of the step four and the step five;
step seven, a third screening process: thirdly screening the product e2 obtained in the fifth step and the product c2 obtained in the third step through a double-layer linear sieve with the diameter of 15mm of the sieve holes at the upper layer and the diameter of 4.75mm of the sieve holes at the lower layer to obtain products f1, f2 and f3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step eight, a material distribution process: distributing the product f3 obtained in the step seven through a distribution hopper according to the weight ratio of 1:1 to obtain products g1 and g 2;
step nine, a powder selecting process: selecting the product g1 obtained in the step eight by a powder selecting machine to obtain products h1 and h2, wherein the powder content of the product h2 is less than 10%;
step ten, sand washing procedure: washing the product g2 obtained in the step eight by a sand washer to obtain products i1 and i 2;
the products f1, f2, h2 and i2 are 4 products, the yield of the dry sand h2 is equal to that of the wet sand i2, and the powder content of the dry sand h2 is less than 10%.
Example 2: the three-crushing three-screening circulating production process for machine-made sandstone 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 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 third crushing procedure: thirdly crushing the product c1 obtained in the third step by using a cone crusher to obtain a product d after the third crushing, wherein the diameter of the product d is less than 45 mm;
step five, a second screening process: screening the product d obtained in the fourth step for the second time through a circular vibrating screen, wherein the size of a screen hole is 38mm, and obtaining a product e1 on the upper layer of the circular vibrating screen and a product e2 on the lower layer;
step six, a circulating procedure: returning the product e1 obtained in the step five to the step four, and repeating the operations of the step four and the step five;
step seven, a third screening process: thirdly screening the product e2 obtained in the fifth step and the product c2 obtained in the third step through a double-layer linear sieve with the diameter of 15mm of the sieve holes at the upper layer and the diameter of 5mm of the sieve holes at the lower layer to obtain products f1, f2 and f3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step eight, a material distribution process: distributing the product f3 obtained in the step seven through a distribution hopper according to the weight ratio of 1:2 to obtain products g1 and g 2;
step nine, a powder selecting process: selecting powder from the product g1 obtained in the step eight by an air classifier to obtain products h1 and h2, wherein the powder content of the product h2 is less than 15%;
step ten, sand washing procedure: washing sand of the product g2 obtained in the step eight by a spiral classifier to obtain products i1 and i 2;
the products f1, f2, h2 and i2 are 4 products, the yield of the dry sand h2 and the yield of the wet sand i2 in the embodiment are 1:2, and the powder content of the dry sand h2 is less than 15%.
Example 3: the three-crushing three-screening circulating production process for machine-made sandstone 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 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 third crushing procedure: thirdly crushing the product c1 obtained in the third step by using a cone crusher to obtain a product d after the third crushing, wherein the diameter of the product d is less than 45 mm;
step five, a second screening process: screening the product d obtained in the fourth step for the second time through a circular vibrating screen, wherein the size of a screen hole is 40mm, and obtaining a product e1 on the upper layer of the circular vibrating screen and a product e2 on the lower layer;
step six, a circulating procedure: returning the product e1 obtained in the step five to the step four, and repeating the operations of the step four and the step five;
step seven, a third screening process: thirdly screening the product e2 obtained in the fifth step and the product c2 obtained in the third step through a double-layer linear sieve with the diameter of 15mm of the sieve holes at the upper layer and the diameter of 4.75mm of the sieve holes at the lower layer to obtain products f1, f2 and f3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step eight, a material distribution process: distributing the product f3 obtained in the step seven through a distribution hopper according to the weight ratio of 2:1 to obtain products g1 and g 2;
step nine, a powder selecting process: selecting the product g1 obtained in the step eight by a powder selecting machine to obtain products h1 and h2, wherein the powder content of the product h2 is less than 8%;
step ten, sand washing procedure: washing the product g2 obtained in the step eight by a sand washer to obtain products i1 and i 2;
the products f1, f2, h2 and i2 are 4 products, the yield of the dry sand h2 and the yield of the wet sand i2 in the embodiment are 2:1, and the powder content of the dry sand h2 is less than 8%.
Example 4: the three-crushing three-screening circulating production process for machine-made sandstone 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 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 third crushing procedure: thirdly crushing the product c1 obtained in the third step by using a cone crusher to obtain a product d after the third crushing, wherein the diameter of the product d is less than 40 mm;
step five, a second screening process: screening the product d obtained in the fourth step for the second time through a circular vibrating screen, wherein the size of a screen hole is 30mm, and obtaining a product e1 on the upper layer of the circular vibrating screen and a product e2 on the lower layer of the circular vibrating screen;
step six, a circulating procedure: returning the product e1 obtained in the step five to the step four, and repeating the operations of the step four and the step five;
step seven, a third screening process: thirdly screening the product e2 obtained in the fifth step and the product c2 obtained in the third step through a double-layer linear sieve with the diameter of 12mm of the sieve hole at the upper layer and the diameter of 4.75mm of the sieve hole at the lower layer to obtain products f1, f2 and f3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step eight, a material distribution process: distributing the product f3 obtained in the step seven through a distribution hopper according to the weight ratio of 4:1 to obtain products g1 and g 2;
step nine, a powder selecting process: selecting powder from the product g1 obtained in the step eight by an air classifier to obtain products h1 and h2, wherein the powder content of the product h2 is less than 5%;
step ten, sand washing procedure: washing the product g2 obtained in the step eight by a sand washer to obtain products i1 and i 2;
the products f1, f2, h2 and i2 are 4 products, the yield of the dry sand h2 and the yield of the wet sand i2 in the embodiment are 4:1, and the powder content of the dry sand h2 is less than 5%.
Example 5: the three-crushing three-screening circulating production process for machine-made sandstone 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 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 third crushing procedure: thirdly crushing the product c1 obtained in the third step by using a cone crusher to obtain a product d after the third crushing, wherein the diameter of the product d is less than 50 mm;
step five, a second screening process: screening the product d obtained in the fourth step for the second time through a circular vibrating screen, wherein the size of a screen hole is 37mm, and obtaining a product e1 on the upper layer of the circular vibrating screen and a product e2 on the lower layer;
step six, a circulating procedure: returning the product e1 obtained in the step five to the step four, and repeating the operations of the step four and the step five;
step seven, a third screening process: thirdly screening the product e2 obtained in the fifth step and the product c2 obtained in the third step through a double-layer linear sieve with the diameter of the upper-layer sieve hole being 20mm and the diameter of the lower-layer sieve hole being 5mm to obtain products f1, f2 and f3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the double-layer linear sieve;
step eight, a material distribution process: distributing the product f3 obtained in the step seven through a distribution hopper according to the weight ratio of 1:5 to obtain products g1 and g 2;
step nine, a powder selecting process: selecting the product g1 obtained in the step eight by a powder selecting machine to obtain products h1 and h2, wherein the powder content of the product h2 is less than 5%;
step ten, sand washing procedure: washing sand of the product g2 obtained in the step eight by a spiral classifier to obtain products i1 and i 2;
the products f1, f2, h2 and i2 are 4 products, the yield of the dry sand h2 and the yield of the wet sand i2 in the embodiment are 1:5, and the powder content of the dry sand h2 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 (10)
1. A three-crushing three-screening circulating production process for machine-made gravel 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 third crushing procedure: thirdly crushing the product c1 obtained in the third step by a tertiary crusher to obtain a product d after the third crushing;
step five, a second screening process: performing secondary screening on the product d obtained in the step four through secondary screening equipment to obtain a product e1 located at the upper layer of the equipment and a product e2 located at the lower layer of the equipment;
step six, a circulating procedure: returning the product e1 obtained in the step five to the step four, and repeating the operations of the step four and the step five;
step seven, a third screening process: thirdly screening the product e2 obtained in the fifth step and the product c2 obtained in the third step through tertiary screening equipment to obtain products f1, f2 and f3 which are respectively positioned at the upper layer, the middle layer and the lower layer of the equipment;
step eight, a material distribution process: distributing the product f3 obtained in the step seven through distribution equipment according to the required weight ratio to obtain products g1 and g 2;
step nine, a powder selecting process: selecting powder from the product g1 obtained in the step eight by powder selecting equipment to obtain products h1 and h 2;
step ten, sand washing procedure: and (5) washing the product g2 obtained in the step eight by using a sand washing device to obtain products i1 and i 2.
2. The machine-made sand three-crushing three-screening circulation production process as claimed in claim 1, wherein the machine-made sand three-crushing three-screening circulation 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 three-screening circulation production process as claimed in claim 1, wherein the machine-made sand three-crushing three-screening circulation 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 three-screening circulation production process as claimed in claim 1, wherein the machine-made sand three-crushing three-screening circulation 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 three-crushing three-screening circulation production process as claimed in claim 1, wherein the machine-made sand three-crushing three-screening circulation production process comprises the following steps: the third crusher is one or more of a cone crusher, a jaw crusher, a hammer crusher and a counterattack crusher; the diameter of the product d is less than 90 mm.
6. The machine-made sand three-crushing three-screening circulation production process as claimed in claim 1, wherein the machine-made sand three-crushing three-screening circulation 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 single-layer screen, and the diameter of each screen hole is 20-80 mm.
7. The machine-made sand three-crushing three-screening circulation production process as claimed in claim 1, wherein the machine-made sand three-crushing three-screening circulation production process comprises the following steps: the tertiary screening equipment in the step seven is one or two of a linear screen, a circular vibration screen, a resonance screen and a probability screen; the tertiary 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.
8. The machine-made sand three-crushing three-screening circulation production process as claimed in claim 1, wherein the machine-made sand three-crushing three-screening circulation production process comprises the following steps: and step eight, the material distribution equipment is one or two of a material distribution hopper and a material storage bin.
9. The machine-made sand three-crushing three-screening circulation production process as claimed in claim 1, wherein the machine-made sand three-crushing three-screening circulation production process comprises the following steps: and step nine, the powder selecting equipment is one or more of a powder selecting machine, an air classifier and a sieve.
10. The machine-made sand three-crushing three-screening circulation production process as claimed in claim 1, wherein the machine-made sand three-crushing three-screening circulation production process comprises the following steps: the sand washing equipment in the step ten is one or more of a sand washing machine, a sieve, a hydrocyclone and a spiral classifier.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111729741A (en) * | 2020-05-20 | 2020-10-02 | 重庆聚威节能建材有限公司 | Aerated concrete production equipment using waste sandstone as raw material |
| CN112619852A (en) * | 2020-12-25 | 2021-04-09 | 日昌升建筑新材料设计研究院有限公司 | Dry-wet production process for flexible machine-made sandstone |
| CN112619854A (en) * | 2020-12-25 | 2021-04-09 | 日昌升建筑新材料设计研究院有限公司 | Dry production process of flexible high-end machine-made sandstone |
| CN114733631A (en) * | 2022-03-31 | 2022-07-12 | 龙佰武定钛业有限公司 | Method and system for quickly crushing, grinding and grading high-titanium slag |
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Application publication date: 20200512 |