CN111570053A - Grinding process technological method and grinding process technological equipment - Google Patents
Grinding process technological method and grinding process technological equipment Download PDFInfo
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- CN111570053A CN111570053A CN202010320146.XA CN202010320146A CN111570053A CN 111570053 A CN111570053 A CN 111570053A CN 202010320146 A CN202010320146 A CN 202010320146A CN 111570053 A CN111570053 A CN 111570053A
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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
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03B—SEPARATING SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS
- B03B7/00—Combinations of wet processes or apparatus with other processes or apparatus, e.g. for dressing ores or garbage
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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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- Crushing And Grinding (AREA)
- Disintegrating Or Milling (AREA)
Abstract
The invention discloses a crushing and grinding process technological method and crushing and grinding process technological equipment, which adopt a technical route of 'more crushing and less grinding' and use a more energy-saving high-pressure roller mill and a vertical mill to realize energy conservation and consumption reduction of the crushing and grinding process of a concentrating mill.
Description
Technical Field
The invention relates to the technical field of mineral separation, in particular to a crushing and grinding process technological method and crushing and grinding process technological equipment.
Background
At present, the energy consumption of the grinding operation generally accounts for more than 60 percent of the energy consumption of the whole ore dressing plant, and the energy consumption of the grinding operation accounts for more than 80 percent of the energy consumption of the grinding operation.
At present, the crushing and grinding production processes of domestic and foreign concentrating mills mainly comprise three types: 1. the conventional three-section one-closed-circuit crushed ore and ball milling crushing and grinding process. 2. The process of self-grinding (semi-self-grinding) and ball-milling is carried out. 3. The novel three-section one-closed-circuit crushed ore and ball milling crushing and grinding process is characterized in that a high-pressure roller mill is adopted to replace fine crushing equipment on the basis of the conventional three-section one-closed-circuit crushed ore and ball milling crushing and grinding process.
1. The grinding process of 'conventional three-section one-closed-circuit crushed ore + ball milling' (as shown in figure 1): and after coarse crushing, conveying the ore to a screening plant by a belt conveyor for pre-screening, transferring the qualified product below the screen to a powder ore bin by the belt conveyor, and feeding the product above the screen to a middle fine crushing plant by the belt conveyor for middle crushing by a cone crusher. And the products after medium crushing are returned to the screening plant for screening through the belt conveyor, the products on the screen are returned to the medium and fine crushing plant through the belt conveyor and are finely crushed through the cone crusher, and the products after fine crushing are returned to the screening plant through the belt conveyor for closed-circuit screening. The product on the screen returns to the middle and fine crushing plant to form a closed circuit, the particle size of the product under the screen is minus 12mm, and the product is transferred to a fine ore bin of a dressing plant through a belt conveyor.
And a belt feeder and a belt conveyor are arranged below the powder ore bin, and the ore is conveyed to a ball mill of a grinding and floating plant for grinding. And (4) feeding the ore pulp subjected to ore grinding into a hydrocyclone for classification. The bottom flow of the cyclone returns to the ball mill for ore grinding, and the overflow of the cyclone enters the sorting operation.
2. "autogenous grinding (semi-autogenous grinding) + ball milling" crushing process (as shown in fig. 2): and conveying the coarsely crushed ore to a coarse ore bin of a concentrating mill through a belt conveyor. And a heavy plate feeder and a belt conveyor are arranged below the coarse ore bin, and the ore is conveyed to a semi-autogenous mill of a grinding floating workshop for grinding. Ore discharging of the semi-autogenous mill automatically flows to the linear vibrating screen for screening, and materials on the screen are transported to a hard rock crushing and buffering ore bin through a belt conveyor and a transfer station. A belt feeder is arranged below the hard rock crushing buffer ore bin to feed ores to a cone crusher for crushing operation, and crushed products are transported back to the semi-autogenous mill through a belt conveyor. The undersize material enters a ball milling-cyclone closed flow. The ball mill and the hydraulic cyclone constitute a closed circuit grinding, the bottom flow of the cyclone returns to the ball mill for grinding, and the overflow of the cyclone enters the sorting operation.
3. The novel three-section one-closed-circuit crushed ore and ball milling crushing process (as shown in figure 3) comprises the following steps: and conveying the coarsely crushed ore to a medium crushing workshop by a belt conveyor and performing medium crushing by a cone crusher. The product after crushing is transported to a screening plant through a belt conveyor to be screened in a closed circuit, the product on the screen of the upper layer is returned to the middle crushing plant through the belt conveyor to be crushed in a middle crushing plant, the intermediate product is transported to the fine crushing plant through the belt conveyor to be crushed in a fine crushing plant, the fine crushing plant adopts a high-pressure roller mill, the product after fine crushing is returned to the screening plant through the belt conveyor to be screened in a closed circuit, the product on the screen is returned to the fine crushing plant to form a closed circuit, the product under the screen and the product under the screen of the lower layer screen of the middle crushing inspection screen are gathered into final qualified products, and the product granularity is-12 mm and.
And a belt feeder and a belt conveyor are arranged below the powder ore bin, and the ore is conveyed to a ball mill of a grinding and floating plant for grinding. And (4) feeding the ore pulp subjected to ore grinding into a hydrocyclone for classification. The bottom flow of the cyclone returns to the ball mill for ore grinding, and the overflow of the cyclone enters the sorting operation.
The three grinding processes have the following defects: 1. the conventional three-section one-closed-circuit ore crushing and ball milling crushing and grinding process has the advantages that the ore feeding granularity of the ball mill is-12 mm, and the ore grinding energy consumption is high. 2. The grinding process of autogenous grinding (semi-autogenous grinding) and ball milling has the feeding granularity of-300 mm and high grinding energy consumption. 3. The novel three-section one-closed-circuit ore crushing and ball milling crushing and grinding process has the advantages that the ore feeding granularity of the ball mill is-12 mm, and the ore grinding energy consumption is high.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention aims to provide an energy-saving grinding process.
According to the grinding flow process method in the embodiment of the first aspect of the invention, the method comprises the following steps:
crushing raw ore into fine crushed products with the granularity less than or equal to 20 mm;
step two, performing superfine grinding treatment on the fine crushed product by using a high-pressure roller mill, performing wet screening treatment on the product after the treatment of the high-pressure roller mill, returning the product on the screen in the wet screening process to the high-pressure roller mill for performing superfine crushing treatment to form a closed circuit, wherein the product under the screen in the wet screening process is the superfine crushed product with the granularity less than or equal to 3 mm;
step three, the superfine crushed products are sent into a hydrocyclone for classification, the classified unqualified products automatically flow to a vertical mill for grinding, and the ground products of the vertical mill return to the hydrocyclone for classification to form a closed circuit; and the classified qualified products enter the subsequent sorting operation.
According to the crushing and grinding process method provided by the embodiment of the first aspect of the invention, the raw ore is crushed into the fine crushed product with the granularity of less than or equal to 20mm, so that the requirement on the feeding granularity of the high-pressure roller mill can be met, the high-pressure roller mill is favorable for carrying out ultra-fine crushing treatment on the fine crushed product, and the ore crushing efficiency and quality of the high-pressure roller mill are improved. The hydraulic system of the high-pressure roller mill can provide enough extrusion force, so that the ore of the fine crushing product is crushed, a large amount of microcracks are generated, the grindability of the material is improved, the material is easy to grind in the mill, and the energy consumption is saved. The product treated by the high-pressure roller mill is subjected to wet screening treatment, the product on the screen in the wet screening process returns to the high-pressure roller mill for superfine crushing treatment to form a closed circuit, and the product under the screen in the wet screening process is the superfine crushed product with the granularity less than or equal to 3 mm; thus, the fine crushed product can be completely converted into the superfine crushed product with the particle size less than or equal to 3 mm. Carrying out cyclone classification on the superfine crushed products through a hydrocyclone, automatically flowing the classified unqualified products to a vertical mill for grinding, returning the ground products of the vertical mill to the hydrocyclone for classification to form a closed circuit; therefore, the superfine crushed products with the granularity less than or equal to 3mm can be completely converted into qualified products which can enter the subsequent sorting operation. Because the degree of fullness between the grinding medium and the material of the vertical mill is high, the collision between the grinding medium, the wear-resistant lining plate and the stirring spiral body is little, the stress of a supporting system of the whole rotating part is small, and the energy consumption of the bearing is also small. Because the stirring rotating speed of the vertical mill is low, mechanical parts in the vertical mill do not move relatively, and the stirred grinding media roll orderly, so that the vertical mill has the characteristic of low energy consumption. According to the embodiment of the first aspect of the invention, energy conservation and consumption reduction of the crushing and grinding process of the concentrating mill are realized by utilizing the technical route of more crushing and less grinding and using a more energy-saving high-pressure roller mill and a vertical mill. Experiments prove that the inventionOn one hand, compared with the conventional three-section one-closed-circuit crushed ore and ball milling crushing and grinding process flow in the prior art, the embodiment saves electricity by 1.32kW ∙ h/tRaw oreCompared with the prior art that the electricity is saved by 4.19kW ∙ h/t by the 'semi-autogenous grinding and ball milling' crushing and grinding process flowRaw oreCompared with the novel three-section one-closed-circuit crushed ore and ball milling crushing and grinding process flow in the prior art, the electricity is saved by 0.92kW ∙ h/tRaw ore。
According to an embodiment of the first aspect of the present invention, said step one comprises the sub-steps of:
carrying out coarse crushing treatment on the raw ore to obtain a coarse crushed product with the granularity of less than or equal to 300 mm;
carrying out middle crushing treatment on the coarse crushed product to obtain a middle crushed product;
performing dry screening on the medium crushed product, and returning the product on the screen to the dry screening after fine crushing treatment in the dry screening process to form a closed circuit; and the undersize product in the dry screening process is the finely divided product.
The invention also aims to provide a crushing and grinding process equipment.
The crushing and grinding process equipment according to the second aspect of the invention comprises:
the rotary crusher is used for carrying out coarse crushing treatment on the raw ore to obtain a coarse crushing product with the granularity of less than or equal to 300 mm;
a medium crushing cone crusher for performing medium crushing treatment on the coarse crushed product to obtain a medium crushed product;
a dry screening shaker for dry screening the medium crushed product;
the fine crushing cone crusher is used for performing fine crushing treatment on the products on the screen in the dry screening process, and the dry screening vibrating screen is also used for performing dry screening on the products after the fine crushing treatment of the fine crushing cone crusher; the undersize product of the dry-type screening vibrating screen is a fine crushed product with the granularity less than or equal to 20 mm;
the high-pressure roller mill is used for carrying out superfine grinding treatment on the fine crushed products;
the wet-type screening vibrating screen is used for performing wet screening on the product subjected to the ultrafine grinding treatment of the high-pressure roller mill, the high-pressure roller mill is also used for performing ultrafine grinding treatment on the product on the screen in the wet-type screening process, and the product under the screen of the wet-type screening vibrating screen is an ultrafine grinding product with the granularity of less than or equal to 3 mm;
a hydrocyclone for cyclone classification of the ultrafine crushed product;
the vertical mill is used for grinding unqualified products obtained by cyclone classification of the hydrocyclone, and the hydrocyclone is also used for cyclone classification of ground products of the vertical mill; and qualified products obtained by cyclone classification of the hydrocyclone enter subsequent sorting operation.
According to the crushing and grinding process equipment of the embodiment of the second aspect of the invention, the coarse crushing treatment is carried out on the raw ore by the gyratory crusher to obtain the coarse crushing product with the granularity less than or equal to 300mm, the intermediate crushing treatment is carried out on the coarse crushing product by the intermediate crushing cone crusher 7, the intermediate crushing product is dry-screened by the dry screening vibrating screen, the oversize product (the material with the granularity greater than 20 mm) in the dry screening process is finely crushed by the fine crushing cone crusher, the dry screening vibrating screen is used for dry screening the finely crushed product by the fine crushing cone crusher to form a closed circuit, the undersize product of the dry screening vibrating screen is the fine crushing product with the granularity less than or equal to 20mm, therefore, the gyratory crusher, the intermediate crushing cone crusher, the dry screening vibrating screen and the fine crushing cone crusher are used for converting the raw ore into the fine crushing product with the granularity less than or equal to 20mm, the fine crushing product with the granularity less than or equal to 20mm can meet the requirement of the feeding granularity of the high-pressure mill, the high-pressure roller mill is favorable for carrying out superfine grinding treatment on the fine-ground products, and the ore crushing efficiency and quality of the high-pressure roller mill 17 are improved. The hydraulic system of the high-pressure roller mill can provide enough extrusion force, so that the ore of the fine crushing product is crushed, a large amount of microcracks are generated, the grindability of the material is improved, the material is easy to grind in the mill, and the energy consumption is saved. The product treated by the high-pressure roller mill is subjected to wet screening and vibrating screenWet screening, returning the oversize product in the wet screening process to a high-pressure roller mill for superfine crushing to form a closed circuit, wherein the undersize product in the wet screening process is a superfine crushed product with the granularity less than or equal to 3 mm; therefore, the high-pressure roller mill and the wet screening vibrating screen are utilized to convert all the fine crushed products into superfine crushed products with the granularity less than or equal to 3 mm. Carrying out cyclone classification on the superfine crushed products through a hydrocyclone, automatically flowing the classified unqualified products to a vertical mill 24 for grinding, returning the ground products of the vertical mill 24 to the hydrocyclone for classification to form a closed circuit; therefore, the hydrocyclone and the vertical mill can be used for completely converting superfine crushed products with the granularity less than or equal to 3mm into qualified products which can enter subsequent sorting operation. Because the degree of fullness between the grinding medium and the material of the vertical mill is high, the collision between the grinding medium, the wear-resistant lining plate and the stirring spiral body is little, the stress of a supporting system of the whole rotating part is small, and the energy consumption of the bearing is also small. Because the stirring rotating speed of the vertical mill is low, mechanical parts in the vertical mill do not move relatively, and the stirred grinding media roll orderly, so that the vertical mill has the characteristic of low energy consumption. The embodiment of the second aspect of the invention realizes energy conservation and consumption reduction of the crushing and grinding process of the concentrating mill by utilizing the technical route of more crushing and less grinding and using a more energy-saving high-pressure roller mill and a vertical grinding mill. Experiments prove that compared with the conventional three-section one-closed-circuit crushed ore and ball milling crushing and grinding process flow in the prior art, the embodiment of the second aspect of the invention saves electricity by 1.32kW ∙ h/tRaw oreCompared with the prior art that the electricity is saved by 4.19kW ∙ h/t by the 'semi-autogenous grinding and ball milling' crushing and grinding process flowRaw oreCompared with the novel three-section one-closed-circuit crushed ore and ball milling crushing and grinding process flow in the prior art, the electricity is saved by 0.92kW ∙ h/tRaw ore。
According to one embodiment of the second aspect of the invention, further comprising a raw ore surge bin disposed above the gyratory crusher for storing and feeding raw ore into the gyratory crusher.
According to an embodiment of the second aspect of the invention, further comprising a coarse crushing buffer bin arranged below the gyratory crusher for buffering the coarse crushed product falling from the gyratory crusher.
According to a further embodiment of the second aspect of the invention, the system further comprises a first heavy-duty plate feeder, a first belt conveyor and a coarse crushing ore bin, wherein the first heavy-duty plate feeder is arranged below the coarse crushing buffer ore bin and is used for receiving the coarse crushing products discharged from the coarse crushing buffer ore bin and conveying the coarse crushing products to the first belt conveyor, and the first belt conveyor is used for conveying the coarse crushing products conveyed by the first heavy-duty plate feeder to the coarse crushing ore bin for storage.
According to a still further embodiment of the second aspect of the invention, the crusher further comprises a second heavy duty plate feeder, a second belt conveyor, a middle crushing buffer bin and a first belt feeder, wherein the second heavy duty plate feeder is arranged below the coarse crushing bin and is used for receiving the coarse crushing products discharged from the coarse crushing bin and conveying the coarse crushing products to the second belt conveyor, the second belt conveyor is used for conveying the coarse crushing products conveyed by the second heavy duty plate feeder to the middle crushing buffer bin, the first belt feeder is arranged below the middle crushing buffer bin, and the first belt feeder is used for receiving the coarse crushing products discharged from the middle crushing buffer bin and conveying the coarse crushing products to the middle crushing cone crusher.
According to an embodiment of the second aspect of the invention, the dry screening vibratory screen further comprises a third belt conveyor for receiving the medium crushed product discharged by the medium crusher and the finely crushed processed product discharged by the fine crusher and conveying the same into the screening surge bin, a screening surge bin disposed below the screening surge bin, and a second belt feeder for receiving the material discharged by the screening surge bin and conveying the same into the dry screening vibratory screen.
According to one embodiment of the second aspect of the invention, the apparatus further comprises a fourth belt conveyor for conveying the oversize product of the dry screen shaker into the fine crushing surge bin, a fine crushing surge bin, and a third belt feeder for receiving material discharged from the fine crushing surge bin and conveying the material into the fine crushing cone crusher.
According to an embodiment of the second aspect of the invention, a fifth belt conveyor for conveying the fine crushed product screened out by the dry screening shaker into the fine crushed ore bin, a fourth belt feeder disposed below the fine crushed ore bin and a sixth belt conveyor for receiving the fine crushed product discharged from the fine crushed ore bin and conveying into the high pressure roller mill are further included.
According to an embodiment of the second aspect of the invention, a seventh belt conveyor is further included for receiving the ultrafinely comminuted treated product discharged from the high pressure roller mill and conveying it into the wet screening vibratory screen.
According to an embodiment of the second aspect of the invention, further comprising an eighth belt conveyor for conveying the oversize product of the wet screening shaker into the high pressure roller mill.
According to an embodiment of the second aspect of the present invention, the system further comprises a pump sump for receiving undersize products of the wet screening shaker and the ground products of the vertical mill, and a slurry pump for pumping the undersize products of the wet screening shaker and the ground products of the vertical mill in the pump sump into the hydrocyclone for cyclone classification.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of a conventional three-stage-closed circuit crushing and ball milling crushing process in the prior art.
FIG. 2 is a flow chart of the "autogenous grinding (semi-autogenous grinding) + ball milling" crushing and grinding process in the prior art.
FIG. 3 is a flow chart of a new three-section one-closed-circuit crushed ore and ball milling crushing process in the prior art.
Fig. 4 is a flow chart of the crushing process according to the embodiment of the first aspect of the invention, which illustrates a flow of "three-stage-one closed circuit crushing, high pressure roller milling and vertical milling".
FIG. 5 is a schematic view of a crushing and grinding process apparatus according to an embodiment of the second aspect of the present invention.
Reference numerals:
gyratory crusher 1 first heavy duty apron feeder 2 first belt conveyor 3 second heavy duty apron feeder 4
Second belt conveyor 5 first belt feeder 6 middle crushing cone crusher 7 third belt conveyor 8
Third belt feeder 9 fine crushing cone crusher 10 second belt feeder 11 dry type screening vibration screen 12
High pressure roller mill 17 seventh belt conveyor 18 wet screening vibrating screen 19 eighth belt conveyor 20
Pump sump 21, slurry pump 22, hydrocyclone 23 and vertical mill 24
Crude ore buffer bin 25 coarse crushing buffer bin 26 coarse crushing buffer bin 27 medium crushing buffer bin 28
Fine crushing buffer bin 29, sieving buffer bin 30 and fine crushing bin 31
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The grinding process in the concentrating mill is usually the most energy-consuming unit, and the energy consumption can account for more than 60% of the total energy consumption of the concentrating mill. Therefore, how to reduce the energy consumption of the grinding process is the key point for realizing energy conservation and consumption reduction of the concentrating mill.
The invention aims at realizing energy conservation and consumption reduction of the crushing and grinding process of the concentrating mill, and reduces the energy consumption of the concentrating mill for treating unit ore by the technical route of more crushing and less grinding and the application of energy-saving equipment. The production cost of enterprises is reduced, and the economic benefit of the enterprises is increased.
A attrition milling process flow embodiment of the first aspect of the invention is described below with reference to fig. 1.
As shown in fig. 1, the grinding process according to the embodiment of the first aspect of the present invention includes the following steps:
crushing raw ore into fine crushed products with the granularity less than or equal to 20 mm;
step two, performing superfine grinding treatment on the fine crushed product by using a high-pressure roller mill, performing wet screening treatment on the product after the treatment of the high-pressure roller mill, returning the product on the screen in the wet screening process to the high-pressure roller mill for superfine crushing treatment to form a closed circuit, wherein the product under the screen in the wet screening process is the superfine crushed product with the granularity less than or equal to 3 mm;
step three, conveying the superfine crushed products into a hydrocyclone for classification, automatically flowing the classified unqualified products to a vertical mill for grinding, returning the ground products of the vertical mill to the hydrocyclone for classification, and forming a closed circuit; and the classified qualified products enter the subsequent sorting operation.
According to the crushing and grinding process method provided by the embodiment of the first aspect of the invention, the raw ore is crushed into the fine crushed product with the granularity of less than or equal to 20mm, so that the requirement on the feeding granularity of the high-pressure roller mill can be met, the high-pressure roller mill is favorable for carrying out ultra-fine crushing treatment on the fine crushed product, and the ore crushing efficiency and quality of the high-pressure roller mill are improved. The hydraulic system of the high-pressure roller mill can provide enough extrusion force, so that the ore of the fine crushing product is crushed, a large amount of microcracks are generated, the grindability of the material is improved, the material is easy to grind in the mill, and the energy consumption is saved. After the high-pressure roller mill is processedThe product is subjected to wet screening treatment, the product on the screen in the wet screening process returns to the high-pressure roller mill for superfine crushing treatment to form a closed circuit, and the product under the screen in the wet screening process is the superfine crushed product with the granularity less than or equal to 3 mm; thus, the fine crushed product can be completely converted into the superfine crushed product with the particle size less than or equal to 3 mm. Carrying out cyclone classification on the superfine crushed products through a hydrocyclone, automatically flowing the classified unqualified products to a vertical mill for grinding, returning the ground products of the vertical mill to the hydrocyclone for classification to form a closed circuit; therefore, the superfine crushed products with the granularity less than or equal to 3mm can be completely converted into qualified products which can enter the subsequent sorting operation. Because the degree of fullness between the grinding medium and the material of the vertical mill is high, the collision between the grinding medium, the wear-resistant lining plate and the stirring spiral body is little, the stress of a supporting system of the whole rotating part is small, and the energy consumption of the bearing is also small. Because the stirring rotating speed of the vertical mill is low, mechanical parts in the vertical mill do not move relatively, and the stirred grinding media roll orderly, so that the vertical mill has the characteristic of low energy consumption. According to the embodiment of the first aspect of the invention, energy conservation and consumption reduction of the crushing and grinding process of the concentrating mill are realized by utilizing the technical route of more crushing and less grinding and using a more energy-saving high-pressure roller mill and a vertical mill. Experiments prove that compared with the conventional three-section one-closed-circuit crushed ore and ball milling crushing and grinding process flow in the prior art, the embodiment of the first aspect of the invention saves electricity by 1.32kW ∙ h/tRaw oreCompared with the prior art that the electricity is saved by 4.19kW ∙ h/t by the 'semi-autogenous grinding and ball milling' crushing and grinding process flowRaw oreCompared with the novel three-section one-closed-circuit crushed ore and ball milling crushing and grinding process flow in the prior art, the electricity is saved by 0.92kW ∙ h/tRaw ore。
According to an embodiment of the first aspect of the invention, step one comprises the sub-steps of: carrying out coarse crushing treatment on the raw ore to obtain a coarse crushed product with the granularity of less than or equal to 300 mm; carrying out middle crushing treatment on the coarse crushed product to obtain a middle crushed product; performing dry screening on the medium crushed product, and returning the product on the screen to the dry screening after fine crushing in the dry screening process to form a closed circuit; and the undersize product in the dry screening process is a finely-divided product. Therefore, the raw ore can be converted into a fine crushed product with the granularity less than or equal to 20mm, and the requirement of the feed granularity of the high-pressure roller mill is met.
A attrition milling process apparatus in accordance with an embodiment of the second aspect of the invention is described below with reference to fig. 2.
As shown in fig. 2, the crushing and grinding process equipment according to the embodiment of the second aspect of the present invention includes a gyratory crusher 1, a medium crushing cone crusher 7, a dry screening vibrating screen 12, a fine crushing cone crusher 10, a high pressure roller mill 17, a wet screening vibrating screen 19, a hydrocyclone 23 and a vertical mill 24. Wherein, the gyratory crusher 1 is used for carrying out coarse crushing treatment on raw ores to obtain coarse crushed products with the granularity less than or equal to 300 mm; the medium crushing cone crusher 7 is used for performing medium crushing treatment on the coarse crushed product to obtain a medium crushed product; the dry screening vibrating screen 12 is used for performing dry screening on the medium crushed product; the fine crushing cone crusher 10 is used for performing fine crushing treatment on products on a sieve in the dry-type screening process, and the dry-type screening vibrating screen 12 is also used for performing dry-type screening on the products after the fine crushing treatment of the fine crushing cone crusher 10; the undersize product of the dry-type screening vibrating screen 12 is a fine crushed product with the granularity less than or equal to 20 mm; the high-pressure roller mill 17 is used for carrying out superfine grinding treatment on the fine crushed products; the wet-type screening vibrating screen 19 is used for performing wet screening on the product subjected to the ultrafine grinding treatment by the high-pressure roller mill 17, the high-pressure roller mill 17 is also used for performing ultrafine grinding treatment on the product on the screen in the wet screening process, and the product under the screen of the wet-type screening vibrating screen 19 is an ultrafine grinding product with the granularity of less than or equal to 3 mm; the hydrocyclone 23 is used for carrying out cyclone classification on the superfine crushed products; the vertical mill 24 is used for milling the unqualified products obtained by cyclone classification of the hydrocyclone 23, and the hydrocyclone 23 is also used for cyclone classification of the milled products of the vertical mill 24; and qualified products obtained by cyclone classification of the hydrocyclone 23 enter subsequent sorting operation.
According to the crushing and grinding process equipment of the embodiment of the second aspect of the invention, the rotary crusher 1 is used for performing coarse crushing treatment on raw ore to obtain coarse crushed products with the granularity less than or equal to 300mm, the intermediate crushing cone crusher 7 is used for performing intermediate crushing treatment on the coarse crushed products, the dry screening vibration sieve 12 is used for performing dry screening on the intermediate crushed products, and the fine crushing cone crusher 10 is used for performing fine crushing on oversize products (materials with the granularity more than 20 mm) in the dry screening processAnd then, the dry-type screening vibrating screen 12 is used for carrying out dry-type screening on the product after the fine crushing treatment of the fine crushing cone crusher 10 to form a closed circuit, and the undersize product of the dry-type screening vibrating screen 12 is the fine crushing product with the granularity of less than or equal to 20mm, so that the gyratory crusher 1, the middle crushing cone crusher 7, the dry-type screening vibrating screen 12 and the fine crushing cone crusher 10 are used for converting the raw ore into the fine crushing product with the granularity of less than or equal to 20mm, the fine crushing product with the granularity of less than or equal to 20mm can meet the feeding granularity requirement of the high-pressure roller mill 17, the high-pressure roller mill 17 is favorable for carrying out superfine crushing treatment on the fine crushing product, and the crushing efficiency and the quality. Because the hydraulic system of the high-pressure roller mill 17 can provide enough extrusion force, the finely-divided product ore is crushed, a large amount of microcracks are generated, the grindability of the material is improved, the material is easy to grind in the mill, and the energy consumption is saved. The product treated by the high-pressure roller mill 17 is subjected to wet screening treatment by a wet screening vibrating screen 19, the product on the screen in the wet screening process returns to the high-pressure roller mill 17 to be subjected to superfine grinding treatment to form a closed circuit, and the product under the screen in the wet screening process is a superfine crushed product with the granularity less than or equal to 3 mm; thus, the high-pressure roller mill 17 and the wet-type screening vibrating screen 19 are utilized to convert all the finely-divided products into ultrafine-divided products with the particle size of less than or equal to 3 mm. Carrying out cyclone classification on the superfine crushed products through a hydrocyclone 23, automatically flowing the classified unqualified products to a vertical mill 24 for grinding, returning the ground products of the vertical mill 24 to the hydrocyclone 23 for classification to form a closed circuit; therefore, the hydrocyclone 23 and the vertical mill 24 can be used for completely converting superfine crushed products with the granularity less than or equal to 3mm into qualified products which can enter subsequent sorting operation. Because the degree of fullness between the grinding medium and the material of the vertical mill 24 is high, the collision between the grinding medium, the wear-resistant lining plate and the stirring spiral body is little, the stress of a supporting system of the whole rotating part is small, and the energy consumption of the bearing is also small. Because the stirring rotating speed of the vertical mill 24 is low, mechanical parts in the vertical mill 24 do not move relatively, and the stirred grinding media roll orderly, so that the vertical mill has the characteristic of low energy consumption. The second aspect embodiment of the invention achieves this by using a "more-crumbled less-grind" route and using a more energy efficient high pressure roller mill 17 and vertical mill 24The energy conservation and consumption reduction of the grinding process of the ore plant. Experiments prove that compared with the conventional three-section one-closed-circuit crushed ore and ball milling crushing and grinding process flow in the prior art, the embodiment of the second aspect of the invention saves electricity by 1.32kW ∙ h/tRaw oreCompared with the prior art that the electricity is saved by 4.19kW ∙ h/t by the 'semi-autogenous grinding and ball milling' crushing and grinding process flowRaw oreCompared with the novel three-section one-closed-circuit crushed ore and ball milling crushing and grinding process flow in the prior art, the electricity is saved by 0.92kW ∙ h/tRaw ore。
According to one embodiment of the second aspect of the invention, there is further included a raw ore surge bin 25, the raw ore surge bin 25 being disposed above the gyratory crusher 1, the raw ore surge bin 25 being adapted to store raw ore and feed the raw ore into the gyratory crusher 1. It can be understood that, by arranging the raw ore buffer ore bin 25, the mine car can transport the raw ore to the raw ore buffer ore bin 25, and the raw ore buffer ore bin 25 can store the amount of ore actually processed by the gyratory crusher 1 for a certain time, for example, the amount of ore actually processed for 0.5h to 4h, so that the coordination and the adaptability of the production operation process can be ensured, the production flow is ensured to be stable, and the production and the processing are continuous; by arranging the gyratory crusher 1 below the raw ore buffer bin 25, the raw ore in the raw ore buffer bin 25 can thus fall directly into the gyratory crusher 1.
According to an embodiment of the second aspect of the invention, further comprising a coarse crushing buffer bin 26, the coarse crushing buffer bin 26 being arranged below the gyratory crusher 1 for buffering coarse crushed product falling from the gyratory crusher 1. It can be understood that the coarse crushing buffer ore bin 26 is arranged below the gyratory crusher 1, so that coarse crushing products subjected to coarse crushing treatment of the gyratory crusher 1 can directly fall into the coarse crushing buffer ore bin, and the coarse crushing buffer ore bin can store certain ore amount, for example, the ore amount larger than two raw ore mine cars is stored, so that the coordination and the adaptability of the production operation process can be ensured, the production flow is ensured to be stable, and the production and the processing are continuous.
According to a further embodiment of the second aspect of the invention, the heavy duty plate feeder 2, the first belt conveyor 3 and the coarse crushing bin 27 are further included, the heavy duty plate feeder 2 is arranged below the coarse crushing buffer bin 26 and is used for receiving coarse crushing products discharged from the coarse crushing buffer bin 26 and conveying the coarse crushing products to the first belt conveyor 3, and the first belt conveyor 3 is used for conveying the coarse crushing products conveyed by the heavy duty plate feeder 2 to the coarse crushing bin 27 for storage. It can be understood that the coarse crushing products in the coarse crushing buffer ore bin can be automatically transported to the coarse crushing ore bin 27 for storage through the arrangement of the first heavy duty plate feeder 2 and the first belt conveyor 3, and the coarse crushing ore bin 27 can store a certain ore amount, for example, the ore amount processed by 0.5 d-2 d of a concentrating mill can be stored, so that the coordination and the adaptability of the production operation process can be ensured, the stability of the production flow is ensured, and the production and the processing are continuous.
According to a still further embodiment of the second aspect of the invention, the second heavy duty plate feeder 4, the second belt conveyor 5, the intermediate crushing buffer bin 28 and the first belt feeder 6 are further included, the second heavy duty plate feeder 4 is arranged below the coarse crushing bin 27 and is used for receiving the coarse crushing products discharged from the coarse crushing bin 27 and conveying the coarse crushing products to the second belt conveyor 5, the second belt conveyor 5 is used for conveying the coarse crushing products conveyed from the second heavy duty plate feeder 4 to the intermediate crushing buffer bin 28, the first belt feeder 6 is arranged below the intermediate crushing buffer bin 28, and the first belt feeder 6 is used for receiving the coarse crushing products discharged from the intermediate crushing buffer bin 28 and conveying the coarse crushing products to the intermediate crushing cone crusher 7. It will be appreciated that by providing the second heavy duty apron feeder 4 and the second belt conveyor 5, the coarsely crushed product in the coarse crushing bin 27 can be automatically transferred to the intermediate crushing surge bin 28; the middle crushing buffer ore bin 28 can store a certain amount of ore, for example, the amount of ore actually processed by the middle crushing cone crusher 7 within 10-15 min, so that the coordination and adaptability of the production operation process can be ensured, the production flow is stable, and the production and processing are continuous; through setting up first belt feeder 6, can be with the coarse crushing product in the middle-size crushing buffer ore storehouse 28 automatic feed to middle-size crushing cone crusher 7 and carry out the middle-size crushing.
According to an embodiment of the second aspect of the invention, the dry-type screening vibratory screen further comprises a third belt conveyor 8, a screening surge bin 30 and a second belt feeder 11, wherein the third belt conveyor 8 is used for receiving the medium-size crushed products discharged by the medium-size cone crusher 7 and the finely-divided processed products discharged by the fine-size cone crusher 10 and conveying the medium-size crushed products into the screening surge bin 30, the second belt feeder 11 is arranged below the screening surge bin 30, and the second belt feeder 11 is used for receiving the materials discharged by the screening surge bin 30 and conveying the materials into the dry-type screening vibratory screen 12. It can be understood that the third belt conveyor 8 can convey the medium-sized crushed products discharged by the medium-sized cone crusher 7 and the finely crushed products discharged by the fine-sized cone crusher 10 to the screening buffer bin 30 for storage; the screening buffer ore bin 30 can store a certain amount of ore, for example, the amount of ore actually processed by the dry screening vibrating screen 12 for 8-40 min, so that the coordination and adaptability of the production operation process can be ensured, the production flow is stable, and the production and processing are continuous; by arranging the second belt feeder 11, the materials in the screening buffer bin 30 (including the medium crushed products discharged by the cone crusher and/or the fine crushed products discharged by the cone crusher 10) can be automatically fed to the dry screening vibrating screen 12 for screening, and the undersize products of the dry screening vibrating screen 12 are fine crushed products with the granularity less than or equal to 20 mm.
According to one embodiment of the second aspect of the invention, the apparatus further comprises a fourth belt conveyor 13, a fine crushing buffer bin 29 and a third belt feeder 9, wherein the fourth belt conveyor 13 is used for conveying the oversize product of the dry screening vibration screen 12 to the fine crushing buffer bin 29, and the third belt feeder 9 is used for receiving the material discharged from the fine crushing buffer bin 29 and conveying the material to the fine crushing cone crusher 10. It will be appreciated that by providing the fourth belt conveyor 13, oversize product (ore having a particle size greater than 20 mm) from the dry screening shaker 12 can be transported to a fine crushing surge bin 29 for storage; the fine crushing buffer ore bin 29 can store a certain amount of ore, for example, the amount of ore actually processed by the fine crushing cone crusher 10 for 8-40 min, so that the coordination and adaptability of the production operation process can be ensured, the production flow is stable, and the production and processing are continuous; by providing the third belt feeder 9, the material in the fine crushing buffer bin 29 can be fed into the fine crushing cone crusher 10 for fine crushing.
According to an embodiment of the second aspect of the invention, there is further included a fifth belt conveyor 14, a fine crushed ore bin 31, a fourth belt feeder 15 and a sixth belt conveyor 16, the fifth belt conveyor 14 being for conveying the fine crushed product sieved out by the dry sieving vibrating screen 12 into the fine crushed ore bin 31, the fourth belt feeder 15 being disposed below the fine crushed ore bin 31, the fourth belt feeder 15 being for receiving the fine crushed product discharged from the fine crushed ore bin 31 and conveying it into the high pressure roller mill 17. It will be appreciated that by providing the fifth belt conveyor 14, undersize product of the dry screening shaker 12, i.e., finely divided product having a particle size of 20mm or less, can be conveyed to the finely divided bin 31; a certain amount of ore can be stored in the fine crushing ore bin 31, for example, the amount of ore actually processed by a concentrating mill for 16-24 h can be stored, so that the coordination and the adaptability of the production operation process can be ensured, the production flow is stable, and the production and the processing are continuous; by providing the fourth belt feeder 15 and the sixth belt conveyor 16, the finely crushed product in the fine crushing bin 31 can be automatically fed to the high-pressure roller mill 17 for ultrafinely crushing.
According to one embodiment of the second aspect of the invention, a seventh belt conveyor 18 is also included, the seventh belt conveyor 18 being adapted to receive the ultrafinely shattered treated product discharged from the high pressure roller mill 17 and to convey it to a wet screen shaker 19. It will be appreciated that by providing the seventh belt conveyor 18, the ultrafinely shattered products discharged from the high pressure roller mill 17 can be conveyed to the wet screening vibratory screen 19 for wet screening.
According to an embodiment of the second aspect of the invention, further comprising an eighth belt conveyor 20, the eighth belt conveyor 20 being adapted to convey the oversize product of the wet screening shaker 19 into the high pressure roller mill 17. It will be appreciated that by providing the eighth belt conveyor 20, the oversize product of the wet screening shaker 19 may be automatically conveyed to the high pressure roller mill 17.
According to an embodiment of the second aspect of the present invention, the cyclone separator further comprises a pump sump 21 and a slurry pump 22, wherein the pump sump 21 is used for receiving undersize products of the wet type screening vibrating screen 19 and ground products of the vertical mill 24, and the slurry pump 22 is used for pumping the undersize products of the wet type screening vibrating screen 19 in the pump sump 21 and the ground products of the vertical mill 24 into the hydrocyclone 23 for cyclone classification. It will be appreciated that by providing the pump sump 21, undersize products of the wet screening shaker 19 and ground products of the vertical mill 24 may be received and stored; the material in the pump pool 21 can be conveyed to the hydrocyclone 23 for cyclone classification by the slurry pump 22.
Referring to fig. 2, the process flow of the grinding process equipment according to the second embodiment of the present invention is described below with a specific example.
The mine car transports raw ore to the raw ore buffering ore bin 25, the raw ore buffering ore bin 25 can store the ore amount actually processed by the gyratory crusher 1 within 0.5 h-4 h, the ore in the raw ore buffering ore bin 25 is coarsely crushed by the gyratory crusher 1, the particle size of the coarsely crushed ore is less than or equal to 300mm, the coarsely crushed ore falls into the coarse crushing buffering ore bin 26, and the coarse crushing buffering ore bin 26 can store the ore amount larger than that of the raw ore transport car 2. The coarsely crushed ore is conveyed to a coarsely crushed ore bin 27 by the first heavy duty plate feeder 2 and the first belt conveyor 3, and the coarsely crushed ore bin 27 can store the ore amount processed by the ore dressing plant for 0.5 d-2 d. The ore in the coarse crushing ore bin 27 is conveyed to the intermediate crushing buffer ore bin 28 by the second heavy duty plate feeder 4 and the second belt conveyor 5, and the intermediate crushing buffer ore bin 28 can store the ore amount actually processed by the intermediate crushing cone crusher 7 within 10-15 min. The ore in the intermediate crushing buffer ore bin 28 is fed to the intermediate crushing cone crusher 7 by the first belt feeder 6 for intermediate crushing, the ore after intermediate crushing is conveyed to the screening buffer ore bin 30 by the third belt conveyor 8, and the screening buffer ore bin 30 can store the ore amount actually processed by the dry screening vibrating screen 12 for 8-40 min. The ore in the screening buffer bin 30 is fed by the second belt feeder 11 to the dry screening vibratory screen 12 for dry screening. The undersize product granularity of the dry-type screening vibrating screen 12 is less than or equal to 20mm, the undersize product is conveyed to a fine crushing bin 31 by a fifth belt conveyor 14, and the fine crushing bin 31 can store the ore amount processed by a concentrating mill for 16-24 h. The oversize product of the dry-type screening vibrating screen 12 is conveyed to a fine crushing buffer bin 29 by a fourth belt conveyor 13, and the fine crushing buffer bin 29 can store the actual ore amount processed by the fine crushing cone crusher 10 within 8-40 min. The ore in the fine crushing buffer ore bin 29 is fed to the fine crushing cone crusher 10 by the third belt feeder 9 for fine crushing, and the fine crushed ore returns to the screening buffer ore bin 30 through the third belt conveyor 8 to form a closed circuit. The ore in the finely crushed ore bin 31 is conveyed to the high-pressure roller mill 17 by the fourth belt feeder 15 and the sixth belt conveyor 16 for ultrafine crushing, the ultrafine crushed product is conveyed to the wet screening vibrating screen 19 by the seventh belt conveyor 18 for wet screening, and the oversize product of the wet screening vibrating screen 19 returns to the high-pressure roller mill 17 for crushing by the eighth belt conveyor 20, so that a closed circuit is formed. The particle size of the undersize product is less than or equal to 3mm, the undersize product enters a pump pool 21 and is conveyed to a hydrocyclone 23 by a slurry pump 22 for classification, the classified unqualified product automatically flows to a vertical mill 24 for grinding, the ground product of the vertical mill 24 flows into the pump pool 21 and is conveyed to the hydrocyclone 23 by the slurry pump 22 for classification, and a closed circuit is formed. And sorting the classified qualified products by a sorting operation.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (13)
1. A grinding process technological method is characterized by comprising the following steps:
crushing raw ore into fine crushed products with the granularity less than or equal to 20 mm;
step two, performing superfine grinding treatment on the fine crushed product by using a high-pressure roller mill, performing wet screening treatment on the product after the treatment of the high-pressure roller mill, returning the product on the screen in the wet screening process to the high-pressure roller mill for performing superfine crushing treatment to form a closed circuit, wherein the product under the screen in the wet screening process is the superfine crushed product with the granularity less than or equal to 3 mm;
step three, the superfine crushed products are sent into a hydrocyclone for classification, the classified unqualified products automatically flow to a vertical mill for grinding, and the ground products of the vertical mill return to the hydrocyclone for classification to form a closed circuit; and the classified qualified products enter the subsequent sorting operation.
2. The attrition milling process of claim 1 wherein step one comprises the substeps of:
carrying out coarse crushing treatment on the raw ore to obtain a coarse crushed product with the granularity of less than or equal to 300 mm;
carrying out middle crushing treatment on the coarse crushed product to obtain a middle crushed product;
performing dry screening on the medium crushed product, and returning the product on the screen to the dry screening after fine crushing treatment in the dry screening process to form a closed circuit; and the undersize product in the dry screening process is the finely divided product.
3. A grinding process equipment is characterized by comprising:
the rotary crusher is used for carrying out coarse crushing treatment on the raw ore to obtain a coarse crushing product with the granularity of less than or equal to 300 mm;
a medium crushing cone crusher for performing medium crushing treatment on the coarse crushed product to obtain a medium crushed product;
a dry screening shaker for dry screening the medium crushed product;
the fine crushing cone crusher is used for performing fine crushing treatment on the products on the screen in the dry screening process, and the dry screening vibrating screen is also used for performing dry screening on the products after the fine crushing treatment of the fine crushing cone crusher; the undersize product of the dry-type screening vibrating screen is a fine crushed product with the granularity less than or equal to 20 mm;
the high-pressure roller mill is used for carrying out superfine grinding treatment on the fine crushed products;
the wet-type screening vibrating screen is used for performing wet screening on the product subjected to the ultrafine grinding treatment of the high-pressure roller mill, the high-pressure roller mill is also used for performing ultrafine grinding treatment on the product on the screen in the wet-type screening process, and the product under the screen of the wet-type screening vibrating screen is an ultrafine grinding product with the granularity of less than or equal to 3 mm;
a hydrocyclone for cyclone classification of the ultrafine crushed product;
the vertical mill is used for grinding unqualified products obtained by cyclone classification of the hydrocyclone, and the hydrocyclone is also used for cyclone classification of ground products of the vertical mill; and qualified products obtained by cyclone classification of the hydrocyclone enter subsequent sorting operation.
4. The comminution process equipment of claim 3, further comprising a raw ore surge bin disposed above the gyratory crusher for storing and feeding raw ore into the gyratory crusher.
5. A comminution process plant according to claim 3, including a coarse comminution surge bin disposed below the gyratory crusher for buffering the coarse comminuted product falling from the gyratory crusher.
6. The comminution process equipment of claim 5, further comprising a first heavy duty plate feeder, a first belt conveyor and a coarse crushing bin, wherein the first heavy duty plate feeder is arranged below the coarse crushing buffer bin and is used for receiving the coarse crushing products discharged from the coarse crushing buffer bin and conveying the coarse crushing products to the first belt conveyor, and the first belt conveyor is used for conveying the coarse crushing products conveyed by the first heavy duty plate feeder to the coarse crushing bin for storage.
7. The crushing and grinding process equipment according to claim 6, further comprising a second heavy duty plate feeder, a second belt conveyor, a middle crushing buffer ore bin and a first belt feeder, wherein the second heavy duty plate feeder is arranged below the coarse crushing ore bin and is used for receiving the coarse crushing products discharged from the coarse crushing ore bin and conveying the coarse crushing products to the second belt conveyor, the second belt conveyor is used for conveying the coarse crushing products conveyed by the second heavy duty plate feeder to the middle crushing buffer ore bin, the first belt feeder is arranged below the middle crushing buffer ore bin, and the first belt feeder is used for receiving the coarse crushing products discharged from the middle crushing buffer ore bin and conveying the coarse crushing products to the middle crushing cone crusher.
8. The comminution and grinding process equipment as claimed in claim 3, further comprising a third belt conveyor, a screening surge bin and a second belt feeder, wherein the third belt conveyor is used for receiving the medium-size products discharged by the medium-size cone crusher and the finely ground processed products discharged by the fine-size cone crusher and conveying the medium-size products to the screening surge bin, the second belt feeder is arranged below the screening surge bin, and the second belt feeder is used for receiving the materials discharged by the screening surge bin and conveying the materials to the dry screening vibration screen.
9. The comminution process equipment of claim 3, further comprising a fourth belt conveyor, a fine crushing buffer bin and a third belt feeder, wherein the fourth belt conveyor is used for conveying the oversize product of the dry screening vibration screen to the fine crushing buffer bin, and the third belt feeder is used for receiving the material discharged from the fine crushing buffer bin and conveying the material to the fine crushing cone crusher.
10. The comminution process equipment of claim 3, further comprising a fifth belt conveyor for conveying the finely divided product from the dry screening vibratory screen into the finely divided bin, a fourth belt feeder disposed below the finely divided bin, and a sixth belt conveyor for receiving the finely divided product from the finely divided bin and conveying the same into the high pressure roller mill.
11. The comminution process equipment of claim 3, further comprising a seventh belt conveyor for receiving the ultrafinely comminuted product from the high pressure roller mill and conveying the same to the wet screen shaker.
12. The attrition mill process unit of claim 3 further comprising an eighth belt conveyor for conveying the oversize product of the wet screen shaker to the high pressure roller mill.
13. A attrition mill process unit as claimed in claim 3 further comprising a pump sump for receiving undersize products of the wet screen shaker and the post-grind product of the vertical mill and a slurry pump for pumping the undersize products of the wet screen shaker and the post-grind product of the vertical mill in the pump sump into the hydrocyclone for cyclone classification.
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| CN115090397B (en) * | 2022-07-06 | 2024-05-17 | 沈阳盛世五寰科技有限公司 | Magnetite dry-type preselection system and preselection method |
| CN115501961A (en) * | 2022-07-31 | 2022-12-23 | 秦国防 | A full autogenous grinding system and full autogenous grinding method capable of quickly reaching production capacity |
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