CN112642564A - Method for producing fine aggregate by metal ore dressing - Google Patents
Method for producing fine aggregate by metal ore dressing Download PDFInfo
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- CN112642564A CN112642564A CN202011388219.5A CN202011388219A CN112642564A CN 112642564 A CN112642564 A CN 112642564A CN 202011388219 A CN202011388219 A CN 202011388219A CN 112642564 A CN112642564 A CN 112642564A
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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
- B02C23/10—Separating or sorting of material, associated with crushing or disintegrating with separator arranged in discharge path of crushing or disintegrating zone
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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
Abstract
The invention discloses a method for producing fine aggregate by mineral separation of metal ores, which comprises the following steps: s1, carrying out coarse crushing on the raw ore, S2, carrying out medium crushing on aggregate in the coarse crushed semi-finished product pile, S3, screening the medium crushed aggregate in a first section, S4, carrying out fine crushing on the aggregate screened in the first section, and S5, screening the fine crushed aggregate in a second section. The method comprises the following steps of roughly crushing raw ores, carrying out medium crushing on roughly crushed semi-finished aggregates, carrying out first-stage screening on the medium crushed aggregates, carrying out second-stage screening on the finely crushed aggregates, carrying out first-stage screening on the raw ores after rough crushing and medium crushing, carrying out fine crushing on the whole aggregates after the first-stage screening, selecting proper particle size fractions for sorting after fine crushing and shaping through the second-stage screening, wherein the aggregates have a good rolling effect in the process of three-stage crushing, the roundness of the product is improved, the contents of flakes and edges and corners in the aggregate product are reduced, and the fineness of the aggregate product is ensured.
Description
Technical Field
The invention belongs to the technical field of mineral separation, and particularly relates to a method for producing fine aggregate by mineral separation of metal ores.
Background
The method improves the recovery and utilization rate of the tungsten and molybdenum resources of the mine, reasonably utilizes and develops the ultra-poor tungsten and molybdenum resources, reduces the operation cost of enterprises, reduces the environmental pollution, and takes a green mine development way. And (3) utilizing ore-containing waste rocks below the boundary grade, preselecting by adopting X-ray intelligent sorting equipment, conveying the pre-selected qualified products to a sorting plant for further treatment, and conveying the pre-selected tailings to an aggregate processing system by adopting a belt for processing.
The waste rock resources are utilized to the maximum extent, good economic benefits can be created for enterprises, waste materials are changed into valuable materials, and the method accords with the development direction of national green mines. And secondly, the stock of the waste dump is reduced, so that the safety risk of an enterprise can be effectively reduced.
The existing method for producing fine aggregate by mineral separation of metal ores has some defects: two-stage crushing is adopted, and then screening is carried out to select proper granularity for sorting. In the process, the retention time of the waste stones in the crushing cavity of the medium crusher is short, so that the thrown waste stones cannot meet the requirements of fine aggregate in shape.
Therefore, it is necessary to provide a method for producing fine aggregate by mineral separation of metal ores, so as to solve the above problems.
Disclosure of Invention
The invention aims to solve the defects in the prior art, the aggregate has a good rolling effect in the process of three-time crushing, the content of mud in the aggregate is reduced, and the purity of raw materials of the product is improved, so that the content of mud in a final gravel aggregate product is reduced, the aggregate of the product is fully crushed, and the quality of the final gravel aggregate product is improved; the final product can meet the requirement of fine aggregate, and provides a method for producing fine aggregate by metal ore dressing.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for producing fine aggregate by metal ore dressing comprises the following steps: a method for producing fine aggregate by metal ore dressing is characterized in that: the method comprises the following steps:
s1, carrying out coarse crushing on the raw ore:
the method comprises the following steps of (1) feeding raw ores into a raw material bin by an automobile or a loader, arranging a grid sieve on the raw material bin, hanging raw materials larger than the sieve pores of the grid sieve out by an impact hammer or a line crane and smashing the raw materials, enabling the raw materials smaller than the sieve pores of the grid sieve to fall into a vibration feeder arranged below a bin in the raw material bin, uniformly conveying and screening the materials by the vibration feeder, uniformly feeding oversize materials with the particle size of +150mm into a jaw crusher for coarse crushing when the gap between sieve bars is 150mm, and enabling aggregate with the particle size of more than 150mm to enter a semi-finished product pile for piling up after;
s2, carrying out medium crushing on the aggregates in the coarsely crushed semi-finished product pile:
feeding aggregate in the semi-finished product stack into a middle crushing cone crusher for middle crushing, arranging a vibrating feeder below the middle crushing cone crusher, uniformly conveying the material into a double-layer circular vibrating screen by the vibrating feeder for screening, wherein the upper layer screen of the double-layer circular vibrating screen is 70mm, the lower layer screen of the double-layer circular vibrating screen is 12mm, and then performing first-stage screening;
s3, feeding the crushed aggregate into a first-stage screening:
the aggregates in the medium-crushed semi-finished product stack are subjected to first-stage screening, wherein the first-stage screening adopts a double-layer screen circular vibrating screen, and the mesh diameters of the double-layer screen circular vibrating screen are respectively set to be 70mm and 12 mm; carrying out primary screening on the medium-crushed semi-finished aggregate by a double-layer circular vibrating screen with the mesh diameter of 70mm and 12mm, feeding the screened 12-70mm semi-finished aggregate into a fine crushing conical crusher for fine crushing, screening the medium-crushed aggregate for a first time, conveying the medium-crushed aggregate to a fine crusher feeding bin, and then feeding the fine-crushed aggregate into fine crushing equipment;
s4, finely crushing the primary screened aggregate:
feeding the aggregates subjected to primary screening into a fine crushing cone crusher for fine crushing, arranging a vibrating feeder below the fine crushing cone crusher, uniformly conveying and screening the materials by the vibrating feeder, uniformly conveying the materials to a screening workshop by the vibrating feeder through a belt, and then feeding the semi-finished aggregates crushed by the fine crusher into a secondary screening;
s5, feeding the finely crushed aggregate into a secondary screening:
subjecting the aggregates in the finely crushed semi-finished product pile to secondary screening, wherein the secondary screening adopts a double-layer screen circular vibrating screen, and the mesh diameters of the double-layer screen circular vibrating screen are respectively set to be 31.5mm and 12 mm; and (3) carrying out secondary screening on the finely-crushed semi-finished aggregate with the mesh diameter set to be 31.5mm and 12mm, taking the screened aggregate with the diameter of 12-31.5mm as a finished aggregate product, and conveying the finished aggregate product into a corresponding finished product bin by a belt conveyor. Fine aggregate of 12-31.5mm is sieved into two kinds of aggregates: 12-20mm (12 materials) and 20-31.5mm (13 materials), respectively.
Preferably, a soil removing sieve and a rubber belt conveyor are arranged below the vibrating feeder, raw materials smaller than the sieve holes of the lattice sieve are fed into the soil removing sieve for sieving and desliming, soil and crushed materials under the sieve are fed into the soil removing sieve through the rubber belt conveyor, and the total treatment capacity of the soil below 20mm under the sieve is about 10-15%.
Preferably, the soil below the sieve of the soil-removed sieve is conveyed into a waste pile by a belt conveyor; lump materials with the particle size of 20-150mm on the sieve are sent by a belt conveyor to be mixed with the materials after being coarsely crushed by a jaw crusher, and the coarsely crushed materials are subjected to iron removal by an iron remover hung on the belt conveyor and then enter a middle crusher for crushing.
Preferably, the hopper for undersize of the vibrating feeding screen is provided with a flap valve, and the undersize can be directly fed into the hopper from a chute to be mixed with the material after the jaw crushing and coarse crushing for intermediate stacking.
Preferably, the belt conveyors are arranged beside the middle crushing cone crusher and the fine crushing cone crusher, the belt conveyors of the middle crushing cone crusher can return the aggregates with oversize materials larger than 70mm to the jaw crusher again through the material returning belts of the belt conveyors for coarse crushing again, and the belt conveyors of the fine crushing cone crusher return the aggregates with oversize materials larger than 31.5mm to the middle crushing cone crusher through the material returning belts of the belt conveyors for secondary middle crushing.
Preferably, belt conveyors are arranged beside the first-stage screening and the second-stage screening, the diameter of the mesh is set to be 70mm, the belt conveyors are arranged beside the circular vibrating screen, semi-finished aggregates with the diameter of 70mm after screening are crushed in a crushing cone crusher through a return leather of the belt conveyors, the semi-finished aggregates are returned to be crushed again, the semi-finished aggregates are crushed again, the diameter of the mesh is set to be 31.5mm, the semi-finished aggregates with the diameter of 31.5mm after screening enter a fine crushing bin through a return leather of the belt conveyors, and then enter fine crushing equipment.
Preferably, in step S5, the refined sand is subjected to material separation again by the material separator, and then subjected to secondary powder separation by the secondary powder separator to obtain refined sand with different stone powder contents.
The invention has the technical effects and advantages that: the invention provides a method for producing fine aggregate by mineral separation of metal ores, which comprises the steps of performing coarse crushing on raw ores, performing middle crushing on aggregate in a coarse crushed semi-finished product stack, performing first-stage screening on the medium crushed aggregate, performing second-stage screening on the fine crushed aggregate, performing first-stage screening on the raw ores after coarse crushing and middle crushing, performing fine crushing on the raw ores after the first-stage screening, selecting proper particle size grade separation through the second-stage screening after fine crushing and shaping, wherein the aggregate plays a good role in rolling during the process of three-time crushing, so that the roundness of the aggregate product is improved, the flake and corner content of the final aggregate product is reduced, the aggregate product is fully rolled, and the quality of the final aggregate product is improved; the final product can meet the requirements of fine aggregate.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to achieve the purpose, the invention provides the following technical scheme:
a method for producing fine aggregate by metal ore dressing comprises the following steps:
s1, carrying out coarse crushing on the raw ore:
the method comprises the following steps of (1) feeding raw ores into a raw material bin by an automobile or a loader, arranging a grid sieve on the raw material bin, hanging raw materials larger than the sieve pores of the grid sieve out by an impact hammer or a line crane and smashing the raw materials, enabling the raw materials smaller than the sieve pores of the grid sieve to fall into a vibration feeder arranged below a bin in the raw material bin, uniformly conveying and screening the materials by the vibration feeder, uniformly feeding oversize materials with the particle size of +150mm into a jaw crusher for coarse crushing when the gap between sieve bars is 150mm, and enabling aggregate with the particle size of more than 150mm to enter a semi-finished product pile for piling up after;
s2, carrying out medium crushing on the aggregates in the coarsely crushed semi-finished product pile:
feeding aggregate in the semi-finished product stack into a middle crushing cone crusher for middle crushing, arranging a vibrating feeder below the middle crushing cone crusher, uniformly conveying the material into a double-layer circular vibrating screen by the vibrating feeder for screening, wherein the upper layer screen of the double-layer circular vibrating screen is 70mm, the lower layer screen of the double-layer circular vibrating screen is 12mm, and then performing first-stage screening;
s3, feeding the crushed aggregate into a first-stage screening:
the aggregates in the medium-crushed semi-finished product stack are subjected to first-stage screening, wherein the first-stage screening adopts a double-layer screen circular vibrating screen, and the mesh diameters of the double-layer screen circular vibrating screen are respectively set to be 70mm and 12 mm; carrying out primary screening on the medium-crushed semi-finished aggregate by a double-layer circular vibrating screen with the mesh diameter of 70mm and 12mm, feeding the screened 12-70mm semi-finished aggregate into a fine crushing conical crusher for fine crushing, screening the medium-crushed aggregate for a first time, conveying the medium-crushed aggregate to a fine crusher feeding bin, and then feeding the fine-crushed aggregate into fine crushing equipment;
s4, finely crushing the primary screened aggregate:
feeding the aggregates subjected to primary screening into a fine crushing cone crusher for fine crushing, arranging a vibrating feeder below the fine crushing cone crusher, uniformly conveying and screening the materials by the vibrating feeder, uniformly conveying the materials to a screening workshop by the vibrating feeder through a belt, and then feeding the semi-finished aggregates crushed by the fine crusher into a secondary screening;
s5, feeding the finely crushed aggregate into a secondary screening:
subjecting the aggregates in the finely crushed semi-finished product pile to secondary screening, wherein the secondary screening adopts a double-layer screen circular vibrating screen, and the mesh diameters of the double-layer screen circular vibrating screen are respectively set to be 31.5mm and 12 mm; and (3) carrying out secondary screening on the finely-crushed semi-finished aggregate with the mesh diameter set to be 31.5mm and 12mm, taking the screened aggregate with the diameter of 12-31.5mm as a finished aggregate product, and conveying the finished aggregate product into a corresponding finished product bin by a belt conveyor. Fine aggregate of 12-31.5mm is sieved into two kinds of aggregates: 12-20mm (12 materials) and 20-31.5mm (13 materials), respectively.
A soil removing sieve and a rubber belt conveyor are arranged below the vibrating feeder, raw materials smaller than the sieve holes of the lattice sieve are sent into the soil removing sieve for sieving and desliming, soil and crushed materials under the sieve are sent into the soil removing sieve by the rubber belt conveyor, and the total treatment capacity of the soil under the sieve is about 10-15%.
Soil below 20mm below the soil removed screen is conveyed into a waste pile by a rubber belt conveyor; lump materials with the particle size of 20-150mm on the sieve are sent by a belt conveyor to be mixed with the materials after being coarsely crushed by a jaw crusher, and the coarsely crushed materials are subjected to iron removal by an iron remover hung on the belt conveyor and then enter a middle crusher for crushing.
The hopper for undersize of the vibrating feeding screen is provided with a flap valve, and the undersize can be directly fed into the hopper from a chute to be mixed with the material after the jaw crushing and coarse crushing, so as to carry out intermediate stacking.
The belt conveyors are arranged beside the medium-sized cone crusher and the fine-sized cone crusher, aggregates with oversize materials larger than 70mm can be returned into the jaw crusher again for coarse crushing again through the material returning belts of the belt conveyors, and the aggregates with oversize materials larger than 31.5mm can be returned into the medium-sized cone crusher through the material returning belts of the belt conveyors for secondary medium crushing through the belt conveyors.
The other belt feeder that all is provided with of one section screening and two-stage process screening, the mesh diameter sets up to 70mm circle and shakes the other belt feeder of sieve, will screen >70 mm's semi-manufactured goods aggregate and carry out well garrulous in the material returning leather weight of belt feeder cone crusher after carrying out well garrulous, the operation of returning well garrulous again carries out well garrulous, the mesh diameter sets up to 31.5 mm's circle and shakes the other belt feeder of sieve, will screen <31.5 mm's semi-manufactured goods aggregate and get into the feed bin in small, broken bits through the material returning skin of belt feeder after entering, get into the.
And step S5, the refined sand is subjected to material separation again through the material separator and then subjected to secondary powder separation through the secondary powder separator to prepare the refined sand with different stone powder contents.
In summary, the following steps: the invention provides a method for producing fine aggregate by mineral separation of metal ores, which is characterized in that raw ores are coarsely crushed, the aggregates in a coarsely crushed semi-finished product pile are subjected to intermediate crushing, the intermediately crushed aggregates are subjected to primary screening, and the aggregates have a good rolling effect in the process of tertiary crushing, so that the roundness of an aggregate product is improved, the contents of flaky and angular shapes of the final aggregate product are reduced, the aggregate product is fully rolled, and the quality of the final aggregate product is improved; the final product can meet the requirements of fine aggregate.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications, substitutions and improvements can be made to the technical solutions described in the foregoing embodiments or to some of the technical features of the embodiments, and any modification, substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A method for producing fine aggregate by metal ore dressing is characterized in that: the method comprises the following steps:
s1, carrying out coarse crushing on the raw ore:
the method comprises the following steps of (1) feeding raw ores into a raw material bin by an automobile or a loader, arranging a grid sieve on the raw material bin, hanging raw materials larger than the sieve pores of the grid sieve out by an impact hammer or a line crane and smashing the raw materials, enabling the raw materials smaller than the sieve pores of the grid sieve to fall into a vibration feeder arranged below a bin in the raw material bin, uniformly conveying and screening the materials by the vibration feeder, uniformly feeding oversize materials with the particle size of +150mm into a jaw crusher for coarse crushing when the gap between sieve bars is 150mm, and enabling aggregate with the particle size of more than 150mm to enter a semi-finished product pile for piling up after;
s2, carrying out medium crushing on the aggregates in the coarsely crushed semi-finished product pile:
feeding aggregate in the semi-finished product stack into a middle crushing cone crusher for middle crushing, arranging a vibrating feeder below the middle crushing cone crusher, uniformly conveying the material into a double-layer circular vibrating screen by the vibrating feeder for screening, wherein the upper layer screen of the double-layer circular vibrating screen is 70mm, the lower layer screen of the double-layer circular vibrating screen is 12mm, and then performing first-stage screening;
s3, feeding the crushed aggregate into a first-stage screening:
the aggregates in the medium-crushed semi-finished product stack are subjected to first-stage screening, wherein the first-stage screening adopts a double-layer screen circular vibrating screen, and the mesh diameters of the double-layer screen circular vibrating screen are respectively set to be 70mm and 12 mm; carrying out primary screening on the medium-crushed semi-finished aggregate by a double-layer circular vibrating screen with the mesh diameter of 70mm and 12mm, feeding the screened 12-70mm semi-finished aggregate into a fine crushing conical crusher for fine crushing, screening the medium-crushed aggregate for a first time, conveying the medium-crushed aggregate to a fine crusher feeding bin, and then feeding the fine-crushed aggregate into fine crushing equipment;
s4, finely crushing the primary screened aggregate:
feeding the aggregates subjected to primary screening into a fine crushing cone crusher for fine crushing, arranging a vibrating feeder below the fine crushing cone crusher, uniformly conveying and screening the materials by the vibrating feeder, uniformly conveying the materials to a screening workshop by the vibrating feeder through a belt, and then feeding the semi-finished aggregates crushed by the fine crusher into a secondary screening;
s5, feeding the finely crushed aggregate into a secondary screening:
subjecting the aggregates in the finely crushed semi-finished product pile to secondary screening, wherein the secondary screening adopts a double-layer screen circular vibrating screen, and the mesh diameters of the double-layer screen circular vibrating screen are respectively set to be 31.5mm and 12 mm; and (3) carrying out secondary screening on the finely-crushed semi-finished aggregate with the mesh diameter set to be 31.5mm and 12mm, taking the screened aggregate with the diameter of 12-31.5mm as a finished aggregate product, and conveying the finished aggregate product into a corresponding finished product bin by a belt conveyor. Fine aggregate of 12-31.5mm is sieved into two kinds of aggregates: 12-20mm (12 materials) and 20-31.5mm (13 materials), respectively.
2. The method for producing fine aggregate by metal ore dressing according to claim 1, wherein the method comprises the following steps: and a soil removal sieve and a rubber belt conveyor are arranged below the vibrating feeder, raw materials smaller than the sieve pores of the lattice sieve are sent into the soil removal sieve for sieving and desliming, soil and crushed materials under the sieve are sent into the soil removal sieve by the rubber belt conveyor, and the total treatment capacity of the soil under the sieve of less than 20mm is about 10-15%.
3. The method for producing fine aggregate by metal ore dressing according to claim 1, wherein the method comprises the following steps: soil below 20mm below the soil removed screen is conveyed into a waste pile by a rubber belt conveyor; lump materials with the particle size of 20-150mm on the sieve are sent by a belt conveyor to be mixed with the materials after being coarsely crushed by a jaw crusher, and the coarsely crushed materials are subjected to iron removal by an iron remover hung on the belt conveyor and then enter a middle crusher for crushing.
4. The method for producing fine aggregate by metal ore dressing according to claim 1, wherein the method comprises the following steps: in step S1, the hopper for the undersize of the vibrating feeding screen is provided with a flap valve, and the undersize can be directly fed into the chute to be mixed with the material after the jaw crushing and coarse crushing by adjusting the flap valve, so as to carry out intermediate stacking.
5. The method for producing fine aggregate by metal ore dressing according to claim 1, wherein the method comprises the following steps: the middle crushing cone crusher and the fine crushing cone crusher are provided with belt conveyors, the belt conveyors of the middle crushing cone crusher can return aggregates with oversize materials larger than 70mm to the jaw crusher again through the return belt of the belt conveyors for coarse crushing again, and the belt conveyors of the fine crushing cone crusher return the aggregates with oversize materials larger than 31.5mm to the middle crushing cone crusher through the return belt of the belt conveyors for secondary middle crushing.
6. The method for producing fine aggregate by metal ore dressing according to claim 1, wherein the method comprises the following steps: one section screening and two-section screening are other all be provided with the belt feeder, and the mesh diameter sets up to 70mm circle and shakes the other belt feeder of sieve, and the semi-manufactured goods aggregate that >70mm after will screening carries out well garrulous in the garrulous cone crusher of returning material skin weight through the belt feeder, returns again and breaks up the operation in, carries out well garrulous once more, and the mesh diameter sets up to 31.5 mm's circle and shakes the other belt feeder of sieve, and the returning charge skin that will screen later <31.5 mm's semi-manufactured goods aggregate passes through the belt feeder gets into the feed bin in small, broken bits, gets into.
7. The method for producing fine aggregate by metal ore dressing according to claim 1, wherein the method comprises the following steps: and step S5, the refined sand is subjected to material separation again through the material separator and then subjected to secondary powder separation through the secondary powder separator to prepare the refined sand with different stone powder contents.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113399262A (en) * | 2021-08-06 | 2021-09-17 | 成都大宏立机器股份有限公司 | Green intelligent grit production factory |
| CN114471913A (en) * | 2022-02-28 | 2022-05-13 | 长江勘测规划设计研究有限责任公司 | Production method and system of punching sand with controllable stone powder content |
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Application publication date: 20210413 |