CN220531846U - Ball milling system capable of effectively protecting characteristics of graphite flakes - Google Patents
Ball milling system capable of effectively protecting characteristics of graphite flakes Download PDFInfo
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- CN220531846U CN220531846U CN202420100321.8U CN202420100321U CN220531846U CN 220531846 U CN220531846 U CN 220531846U CN 202420100321 U CN202420100321 U CN 202420100321U CN 220531846 U CN220531846 U CN 220531846U
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 74
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 74
- 239000010439 graphite Substances 0.000 title claims abstract description 74
- 238000000498 ball milling Methods 0.000 title claims abstract description 43
- 238000000227 grinding Methods 0.000 claims abstract description 81
- 238000005188 flotation Methods 0.000 claims description 14
- 238000003801 milling Methods 0.000 claims description 7
- CAWXEEYDBZRFPE-UHFFFAOYSA-N Hexazinone Chemical compound O=C1N(C)C(N(C)C)=NC(=O)N1C1CCCCC1 CAWXEEYDBZRFPE-UHFFFAOYSA-N 0.000 claims description 5
- 239000011148 porous material Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 abstract description 3
- 210000003462 vein Anatomy 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- 239000000047 product Substances 0.000 description 8
- 239000002245 particle Substances 0.000 description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 description 3
- 239000011707 mineral Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000010494 dissociation reaction Methods 0.000 description 2
- 230000005593 dissociations Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910021382 natural graphite Inorganic materials 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005411 Van der Waals force Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
The utility model provides a ball milling system capable of effectively protecting the characteristics of graphite flakes. The ball milling system capable of effectively protecting the characteristics of graphite flakes comprises a graphite bin, a linear vibrating screen, a first blanking device, a second blanking device, a first conveying device, a second conveying device, first ore grinding equipment, second ore grinding equipment, a first spiral classifier and a second spiral classifier. The ball milling system can promote the fine ore dressing flow of graphite, can effectively avoid excessive grinding of the ball mill to cause excessive damage to graphite scales on a microscopic level, prevent excessive grinding, can also reduce the condition of insufficient grinding strength, can maintain enough grinding force to damage stress between ore and gangue layers, and realizes ore vein separation.
Description
Technical Field
The utility model relates to a ball milling system capable of effectively protecting characteristics of graphite flakes, and belongs to the technical field of mineral separation and dissociation of natural graphite.
Background
Because of the requirement of downstream application, besides the dissociation of graphite ore and gangue, protection of scales is also considered, which are contradictory, so that the integral graphite beneficiation technology is to apply various means to achieve balance of two targets as much as possible.
The traditional natural graphite ore dressing is concentrated in a flotation link, and a plurality of flotation processes are adopted to protect graphite flakes by matching with a regrinding and regrinding ore dressing process, particularly, a single large-scale ore grinding device with certain ore processing amount redundancy is configured and designed in a rough grinding stage, a single ball mill or a rod mill is adopted to form concentrated point contact on the graphite flakes, but the damage to the graphite flakes caused by the mode is larger, and the graphite flakes with different characteristics are damaged to a larger extent in an initial stage of ore dressing. In addition, the ore grinding stage does not have the design of flexible adjustment process, and the product quality of the whole production line is affected.
Disclosure of Invention
In order to solve the technical problems, the utility model aims to provide a ball milling system for effectively protecting the characteristics of graphite flakes, which can realize the effective protection of the graphite flakes in a roughing stage.
In order to achieve the above purpose, the utility model provides a ball milling system for effectively protecting the characteristics of graphite flakes, wherein the ball milling system for effectively protecting the characteristics of graphite flakes comprises a graphite bin, a linear vibrating screen, a first blanking device, a second blanking device, a first conveying device, a second conveying device, first ore grinding equipment, second ore grinding equipment, a first spiral classifier and a second spiral classifier;
wherein, the outlet of the graphite bin is connected with the inlet of the linear vibrating screen;
the first outlet of the linear vibrating screen is positioned in the middle of the upper part of the screen surface of the linear vibrating screen, and the second outlet of the linear vibrating screen is positioned at the tail end of the lower part of the screen surface of the linear vibrating screen;
the first outlet of the linear vibrating screen is connected with the inlet of the first blanking device, the outlet of the first blanking device is connected with the inlet of the first ore grinding equipment through the first conveying device, the outlet of the first ore grinding equipment is connected with the inlet of the first spiral classifier, the first outlet of the first spiral classifier is connected with flotation equipment outside the system, and the second outlet of the first spiral classifier is connected with the inlet of the first ore grinding equipment;
the second outlet of the linear vibrating screen is connected with the inlet of the second blanking device, the outlet of the second blanking device passes through the second conveying device and is connected with the inlet of the second ore grinding equipment, the outlet of the second ore grinding equipment is connected with the inlet of the second spiral classifier, the second outlet of the second spiral classifier is connected with flotation equipment outside the system, and the second outlet of the second spiral classifier is connected with the inlet of the second ore grinding equipment.
According to a specific embodiment of the utility model, the first outlet of the linear vibrating screen is positioned in the middle above the screen surface of the linear vibrating screen, the first outlet is connected with the inlet of the first blanking device, and the outlet of the first blanking device is connected with the inlet of the first ore grinding equipment through the first conveying device, so that ore above the screen surface of the linear vibrating screen can be conveyed to the first ore grinding equipment for ore grinding.
According to a specific embodiment of the utility model, the second outlet of the linear vibrating screen is located at the end below the screen surface of the linear vibrating screen, and is connected with the inlet of the second blanking device, and the outlet of the second blanking device is connected with the inlet of the second ore grinding equipment through the second conveying device, so that ore below the screen surface of the linear vibrating screen can be conveyed to the second ore grinding equipment for ore grinding.
According to a specific embodiment of the present utility model, preferably, the linear vibrating screen has a pore size of 0.7mm.
According to a specific embodiment of the present utility model, preferably, the first conveyor and the second conveyor are each a crawler belt.
According to a specific embodiment of the present utility model, preferably, the first ore grinding apparatus is a lattice ball mill of specification Φ3.2mx6.0m.
According to a specific embodiment of the present utility model, preferably, the second ore grinding apparatus is a lattice ball mill of specification Φ2.7mx6.0m.
According to a specific embodiment of the utility model, a first ore grinding device (phi 3.2mX6.0 m lattice type ball mill) and a second ore grinding device (phi 2.7mX6.0 m lattice type ball mill) are selected to respectively receive ores on a vibrating screen and ores under the vibrating screen, are respectively provided with spiral classifiers matched with the models to form closed circulation, and a valve is arranged at a connecting pipeline to control the two ball mills to form a parallel operation mode.
According to a specific embodiment of the present utility model, preferably, the first spiral classifier is a high weir double spiral classifier.
According to a specific embodiment of the present utility model, preferably, the second spiral classifier is a high weir double spiral classifier.
According to the specific embodiment of the utility model, a closed circuit is formed by adopting the high weir type double-screw classifier and the ore grinding equipment (ball mill), so that qualified classifier overflow products can be produced in the roughing stage.
According to a specific embodiment of the present utility model, preferably, the ball milling system effective to preserve graphite flake characteristics further comprises a first ball loading barrel connected to an inlet of the first ore grinding apparatus. The first ball loading barrel is used for loading balls for ball milling into the first ore grinding equipment, and graphite scales can be better protected by adjusting the types and the numbers of the steel balls and matching with the ore grinding equipment.
According to a specific embodiment of the present utility model, preferably, the ball milling system effective to preserve graphite flake characteristics further comprises a second ball loading barrel connected to an inlet of the second ore grinding apparatus. The second ball loading barrel is used for loading balls for ball milling into the second ore grinding equipment.
According to a specific embodiment of the utility model, preferably the graphite silo is provided with a comminution device, for example a comminution device for comminuting ore to a maximum particle size of 1.2 mm.
The ball milling system for effectively protecting the characteristics of graphite flakes provided by the utility model adopts a double ball mill parallel mode, can process ores of different types, and screens according to the particle size difference, and enters the corresponding ball mill to carry out ore milling work.
The ore characteristics change along with the change of the exploitation degree of the graphite mine, and the defects that the granularity grading of a finished product end is not up to standard, the diameter of a graphite flake is excessively damaged and the like easily occur by adopting a conventional ball milling system. The ball milling system for effectively protecting the characteristics of graphite scales can conform to the development process of graphite production mines, can effectively and timely adjust the process, and increases the flexibility of a grinding scheme.
The ball milling system for effectively protecting the characteristics of graphite flakes has the following beneficial effects: before the ore grinding stage, adding a screening device, and enabling ores with different particle diameters to enter different ore grinding devices after matched crushing; therefore, on one hand, the diameter and thickness of the scales can be protected to the greatest extent at the initial stage of graphite flotation, the damage of the characteristics of the scales in the primary grinding process is reduced, the irreversible damage of interlayer sheets is avoided, the index difference of graphite products is improved, and the limitation of application in market terminals is avoided; on the other hand, the problems of over-grinding and insufficient grinding strength of the ore in the same grinding process can be prevented, the grinding efficiency is improved, and the non-uniformity of the product is reduced.
The ball milling system capable of effectively protecting the characteristics of graphite flakes can promote the fine mineral processing flow of graphite, can effectively avoid excessive damage to the graphite flakes caused by excessive grinding of a ball mill on a microscopic level, prevents excessive grinding, namely does not damage Van der Waals force between graphite crystals, so as to keep the thickness and the integrity of the flakes to the maximum extent, can reduce the condition of insufficient grinding strength, can keep enough grinding force to damage stress between the ore and gangue layers, and realizes ore vein separation; the technical scheme provided by the utility model can improve the problem that the end granularity grading of the traditional graphite finished product is uneven and restrict the development of new graphite material industry for a long time.
Drawings
Fig. 1 is a schematic diagram of the ball milling system for effectively protecting the characteristics of graphite flakes according to example 1.
The main reference numerals illustrate:
the device comprises a graphite silo 1, a linear vibrating screen 2, a first outlet 21, a second outlet 22, a first blanking device 31, a second blanking device 32, a first conveying device 41, a second conveying device 42, a first ore grinding device 51, a second ore grinding device 52, a first spiral classifier 61, a second spiral classifier 62, a first ball loading barrel 71, a second ball loading barrel 72 and a flotation device 8.
Detailed Description
The technical solution of the present utility model will be described in detail below for a clearer understanding of technical features, objects and advantageous effects of the present utility model, but should not be construed as limiting the scope of the present utility model.
Example 1
The embodiment provides a ball milling system for effectively protecting the characteristics of graphite flakes, and the structure of the ball milling system is shown in figure 1. The ball milling system for effectively protecting the characteristics of graphite scales comprises a graphite bin 1, a linear vibrating screen 2, a first blanking device 31, a second blanking device 32, a first conveying device 41, a second conveying device 42, a first ore grinding device 51, a second ore grinding device 52, a first spiral classifier 61, a second spiral classifier 62, a first ball loading barrel 71 and a second ball loading barrel 72; wherein:
the outlet of the graphite bin 1 is connected with the inlet of the linear vibrating screen 2; the graphite silo 1 is provided with crushing equipment, and can crush ores to the extent of 1.2mm of maximum particle size;
the aperture of the linear vibrating screen 2 is 0.7mm;
the first conveyor 41 and the second conveyor 42 are crawler tracks, respectively;
the first grinding apparatus 51 is a lattice ball mill having a specification Φ3.2mx6.0m (ball mill cylinder diameter x cylinder length), and the second grinding apparatus 52 is a lattice ball mill having a specification Φ2.7mx6.0m;
the first spiral classifier 61 is a high-weir type double-spiral classifier, and the second spiral classifier 62 is a high-weir type double-spiral classifier;
the first outlet 21 of the linear vibrating screen 2 is positioned in the middle above the screen surface of the linear vibrating screen 2, and the second outlet 22 of the linear vibrating screen 2 is positioned at the tail end below the screen surface of the linear vibrating screen 2;
the first outlet 21 of the linear vibrating screen 2 is connected with the inlet of the first blanking device 31, the outlet of the first blanking device 31 is connected with the inlet of the first ore grinding device 51 through the first conveying device 41, the outlet of the first ore grinding device 51 is connected with the inlet of the first spiral classifier 61, the first outlet of the first spiral classifier 61 is connected with the flotation device 8 outside the system, and the second outlet of the first spiral classifier 61 is connected with the inlet of the first ore grinding device 51;
the second outlet 22 of the linear vibrating screen 2 is connected with the inlet of the second discharging device 32, the outlet of the second discharging device 32 is connected with the inlet of the second ore grinding device 52 through the second conveying device 42, the outlet of the second ore grinding device 52 is connected with the inlet of the second spiral classifier 62, the first outlet of the second spiral classifier 62 is connected with the flotation device 8 outside the system, and the second outlet of the second spiral classifier 62 is connected with the inlet of the second ore grinding device 52;
the first ball loading barrel 71 is connected to the inlet of the first ore grinding apparatus 51, and the second ball loading barrel 72 is connected to the inlet of the second ore grinding apparatus 52.
When the ball milling system for effectively protecting the characteristics of graphite flakes is used for ball milling of graphite ores, the ball milling system can be used for ball milling of graphite ores in the following manner:
crushing and crushing graphite ores to a maximum particle size of 1.2mm, and entering a linear vibrating screen 2 through a graphite bin 1 for screening classification, wherein:
the oversize graphite ore enters a first blanking device 31, enters a first ore grinding device 51 (phi 3.2mX6.0 m grid ball mill) through a first conveying device 41 for ball milling, the ball-milled material enters a first spiral classifier 61 for classification, the material meeting the requirements enters a flotation device 8 outside the system, and the material not meeting the requirements returns to the first ore grinding device 51 for continuous ball milling;
the undersize material enters the second blanking device 32, enters the second ore grinding equipment 52 (phi 2.7mX6.0 m grid ball mill) through the second conveying device 42 for ball milling, the ball-milled material enters the second spiral classifier 62 for classification, the material meeting the requirements enters the flotation equipment 8 outside the system, and the material not meeting the requirements returns to the second ore grinding equipment 52 for continuous ball milling;
after the small-particle graphite ore material (soft and muddy graphite ore with low density, high weathering degree and high grade) enters the second grinding equipment 52 (phi 2.7mX6.0 m grid ball mill), the impact of the material and grinding medium is relatively low due to small diameter of the cylinder, the friction and impact strength are reasonable, and the grinding process simultaneously achieves the aim of protecting the flake diameter and thickness;
the high-hardness and high-density ore with high silicon content of impurities of the graphite ore subjected to the primary grinding stage enters first ore grinding equipment 51 (phi 3.2mx6.0mlattice ball mill), and is subjected to high-strength friction and impact of an ore grinding medium in a cylinder body, so that the graphite and the impurity minerals are fully dissociated.
According to the ball milling system capable of effectively protecting the characteristics of graphite flakes, through adding the grading device (the linear vibrating screen 2) at the front end of the ball mill, ores processed by different ball mills are more targeted, the problem that overgrinding and insufficient grinding strength of ores are caused simultaneously due to a single grinding process can be prevented, the thickness and the sheet diameter of the graphite flakes are effectively protected, the proportion of the graphite fine powder of a flotation terminal product of 325 meshes is effectively controlled, the grade is comprehensively improved, market application is widened, and the product value is improved.
The ball milling system for effectively protecting the characteristics of graphite flakes can realize flake protection in a rough grinding stage, is beneficial to release of capacity of the whole flotation process flow, enables two grid ball mills to be simultaneously connected in parallel to receive and process ores, can comprehensively release and improve the grinding capacity, and meets the requirement of the whole capacity.
The ball milling system capable of effectively protecting the characteristics of graphite flakes can avoid the phenomena of damage to the graphite flakes and insufficient milling strength when the ball mill excessively grinds the graphite flakes, and adjust the flexibility of a milling scheme when the granularity grading of the end product is poor.
Claims (10)
1. The ball milling system for effectively protecting the characteristics of graphite scales is characterized by comprising a graphite bin (1), a linear vibrating screen (2), a first blanking device (31), a second blanking device (32), a first conveying device (41), a second conveying device (42), first ore grinding equipment (51), second ore grinding equipment (52), a first spiral classifier (61) and a second spiral classifier (62);
the outlet of the graphite bin (1) is connected with the inlet of the linear vibrating screen (2);
the first outlet (21) of the linear vibrating screen (2) is positioned in the middle of the upper part of the screen surface of the linear vibrating screen (2), and the second outlet (22) of the linear vibrating screen (2) is positioned at the tail end of the lower part of the screen surface of the linear vibrating screen (2);
the first outlet (21) of the linear vibrating screen (2) is connected with the inlet of the first blanking device (31), the outlet of the first blanking device (31) is connected with the inlet of the first ore grinding equipment (51) through the first conveying device (41), the outlet of the first ore grinding equipment (51) is connected with the inlet of the first spiral classifier (61), the first outlet of the first spiral classifier (61) is connected with the flotation equipment (8) outside the system, and the second outlet of the first spiral classifier (61) is connected with the inlet of the first ore grinding equipment (51);
the second outlet (22) of the linear vibrating screen (2) is connected with the inlet of the second blanking device (32), the outlet of the second blanking device (32) is connected with the inlet of the second ore grinding equipment (52) through the second conveying device (42), the outlet of the second ore grinding equipment (52) is connected with the inlet of the second spiral classifier (62), the first outlet of the second spiral classifier (62) is connected with the flotation equipment (8) outside the system, and the second outlet of the second spiral classifier (62) is connected with the inlet of the second ore grinding equipment (52).
2. Ball milling system effective to preserve graphite flake properties according to claim 1, characterized in that the pore size of the rectilinear vibrating screen (2) is 0.7mm.
3. Ball milling system effective to preserve graphite flake properties according to claim 1, characterized in that said first conveyor means (41) and said second conveyor means (42) are each caterpillar tracks.
4. Ball milling system effective to preserve graphite flake properties according to claim 1, characterized in that said first milling equipment (51) is a lattice ball mill of specification Φ3.2mx6.0 m.
5. The ball milling system effective to protect the characteristics of graphite flakes according to claim 1, wherein the second milling equipment (52) is a grid ball mill of specification Φ2.7mx6.0 m.
6. The ball milling system effective to preserve graphite flake properties of claim 1, wherein said first spiral classifier (61) is a high weir double spiral classifier.
7. The ball milling system effective to preserve graphite flake properties of claim 1, wherein said second spiral classifier (62) is a high weir double spiral classifier.
8. The ball milling system effective to preserve graphite flake properties of claim 1, further comprising a first ball loading barrel (71), said first ball loading barrel (71) being connected to an inlet of said first milling apparatus (51).
9. The ball milling system effective to preserve graphite flake properties of claim 1, further comprising a second ball loading barrel (72), the second ball loading barrel (72) being connected to an inlet of the second milling apparatus (52).
10. Ball milling system effective in protecting graphite flake properties according to claim 1, characterized in that the graphite silo (1) is provided with a crushing device.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202420100321.8U CN220531846U (en) | 2024-01-16 | 2024-01-16 | Ball milling system capable of effectively protecting characteristics of graphite flakes |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202420100321.8U CN220531846U (en) | 2024-01-16 | 2024-01-16 | Ball milling system capable of effectively protecting characteristics of graphite flakes |
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| CN202420100321.8U Active CN220531846U (en) | 2024-01-16 | 2024-01-16 | Ball milling system capable of effectively protecting characteristics of graphite flakes |
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