CN104941743A - Coal grinding device and method - Google Patents
Coal grinding device and method Download PDFInfo
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- CN104941743A CN104941743A CN201510376243.XA CN201510376243A CN104941743A CN 104941743 A CN104941743 A CN 104941743A CN 201510376243 A CN201510376243 A CN 201510376243A CN 104941743 A CN104941743 A CN 104941743A
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- coal
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- helical runner
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Abstract
The invention discloses a coal grinding device and a coal grinding method, which are suitable for being used in the ore grinding field. The coal grinding device comprises a pre-classification part, a grinding and conveying part and a returned material re-grinding part. The coal grinding method comprises the following steps: firstly, feeding to-be-grinded coal into a semi-open type coal grinding container which is arranged in an inclined mode; under stirring and hydraulic classification of spiral impellers arranged on the coal grinding container, overflowing fine coal particles from an overflow opening of the coal grinding container; under stirring and conveying co-action of the spiral impellers, putting coarse coal particles into grinding media in the spiral impellers to grind; moving the coarse coal particles and the grinding media towards a returned material buffer slot above the coal grinding container; and returning the coarse coal particles into the coal grinding container through a material returning chute, and carrying out next cycle until the coarse coal particles are grinded into fine particles. According to the coal grinding method, the to-be-grinded coal is pre-classified before being grinded, the fine coal particles are pre-discharged and the coarse coal particles are grinded in a material returning process, so that over-crushing of a grinded coal product is reduced, and thus, the coal grinding method is energy-saving and consumption-reducing.
Description
Technical field
The present invention relates to a kind of coal-grinding apparatus and method, be particularly useful for the coal-grinding apparatus that uses in ore grinding field and method.
Background technology
Fully dissociating of target minreal is the basic premise realizing sorting mineral.Along with the progressively variation of China's ature of coal condition, in existing a large amount of coarse grain, coal resource fails owing to fully not dissociating effectively to be reclaimed, and causes the waste of coal resources.Coal-grinding is the effective means of coal degree of dissociation in improving, and milled just can be chosen.Grind relevant patent to material at present to mainly contain
a kind of Micro-stage Grinding method and ball mill(
02141722.9),
valuable mineral selective milling and stage grading process(
86107769),
wet shocking mill(
94100891.6),
vertical grinder(
94223914.8),
vertical spiral agitating mill(
90200524.3),
vertical ore grinder(
95225680.0),
superfine stirring ore grinder(
97238597.5),
instantly grinding scoria micro powder and production technology thereof(
02136907.0),
a kind of Combined type centrifugal ore mill(
200920088122.5),
selective ore milling process for diaspore type bauxite(
01106886.8),
a kind of vertical screw-stirring grinding flotation integration apparatus(
201020234513.6), valuable mineral selective milling and stage grading process (8
6107769),
selective milling method for low-grade lead zinc ores(
201110287901.X),
cassiterite polymetallic sulphide ore selective ore milling process(
201010148201.8).The object of these patents is all intended to utilize the different modes that grinds or the multiple combination grinding mode, the grinding to material is realized by different structural designs, as directly applied to middle coal grinding, then exist and repeat grinding phenomenon, particularly in avoiding coal grinding cross pulverize and energy-saving and cost-reducing in not fully up to expectations, too increase the difficulty of follow-up separation simultaneously.Existing coal-grinding technology, as main in power plant's coal-grinding, water-coal-slurry coal-grinding etc. to reduce product granularity object, and improving degree of dissociation, reduced pulverizing and coal-grinding technology for the purpose of saving energy and reduce the cost very few.
Summary of the invention
Technical problem: the weak point that the present invention be directed to above-mentioned technology, provides a kind of structure simple, easy to use, can reduce the situation that coal-grinding product crosses pulverizing, and energy-saving and cost-reducing coal-grinding apparatus and method.
Technical scheme: for realizing above-mentioned technical purpose, coal-grinding apparatus of the present invention, comprise support, support is respectively equipped with coal-grinding container, the rotatable helical runner connected by bearing in coal-grinding container and the driven unit be connected with coal-grinding container middle (center) bearing, coal-grinding container side is provided with returning charge chute, described driven unit is motor and driven wheel, described coal-grinding container comprises the grinding groove that top half is opened wide, one end that grinding groove is connected with driven unit is laterally provided with returning charge dashpot, returning charge dashpot is provided with discharging opening D, the other end of grinding groove is provided with semi-open-type pyramid hydraulic classiciation groove, hydraulic classiciation groove upper portion side wall is provided with charging aperture A, discharging opening D is consistent with the pointing direction of charging aperture A, the returning charge chute making both link up is provided with between discharging opening D and charging aperture A, returning charge chute is arranged on coal-grinding container outer wall, hydraulic classiciation groove is provided with spill box, overfall B is provided with between hydraulic classiciation groove and spill box, bottom spill box, sidewall is provided with discharging opening C.
Described helical runner blade is met on charge level and is radially provided with multiple riser, and helical runner root of blade is provided with multiple ring-like hole; Gap between described coal-grinding container edge and helical runner is 5 ~ 10mm; The inclination angle of laying of described coal-grinding apparatus support (4) is 25 ° ~ 45 °.
A kind of coal-grinding method, its method is as follows:
A, first start driven unit, driven unit drives the coupled helical runner be located in grinding groove to start to rotate;
B, will treat that coal-grinding material adds in hydraulic classiciation groove from the charging aperture A of hydraulic classiciation groove upper portion side wall together with abrasive media, and to water filling in hydraulic classiciation groove;
C, treat duff grain in coal-grinding material helical runner stir and hydraulic classiciation groove hydraulic classiciation effect under, overflow from hydraulic classiciation groove overfall B and enter in spill box, and discharged by sidewall discharging opening C bottom spill box under gravity;
D, treat rough coal grain in coal-grinding material helical runner stir and conveying acting in conjunction under, be promoted in grinding groove by hydraulic classiciation trench bottom, be placed on the abrasive media grinding between helical runner, and drain in the returning charge dashpot on grinding groove top together with abrasive media;
E, rough coal grain and abrasive media enter hydraulic classiciation groove upper portion side wall charging aperture A by sidewall discharging opening D bottom returning charge dashpot through returning charge chute, return in grinding groove again by helical runner classified grinding, carry out next one circulation, until rough coal grain is milled into duff grain;
Described abrasive media is the ball medium of steel, excellent medium or irregular medium, is regularly supplemented by hydraulic classiciation groove upper portion side wall charging aperture A.
Beneficial effect: the present invention adopts pre-classification, technology that grinding is carried and returning charge is regrinded, can make to treat that coal-grinding material is stirred by helical runner before the milling and the acting in conjunction of hydraulic classiciation groove obtains pre-classification, duff grain is discharged in advance under hydraulic classiciation effect, what avoid duff grain repeats grinding, rough coal grain helical runner stir and conveying acting in conjunction under, be placed on the abrasive media grinding between helical runner, and together with abrasive media through returning charge chute return classified in coal-grinding apparatus after regrind, compared with existing coal-grinding equipment, reduce crossing of coal-grinding product to pulverize, save energy consumption.
Accompanying drawing explanation
Fig. 1 is coal-grinding apparatus structural facades schematic diagram of the present invention.
Fig. 2 is coal-grinding apparatus structural plan of the present invention schematic diagram.
Fig. 3 is auger blade wheel structure schematic diagram of the present invention.
Fig. 4 is coal-grinding apparatus structure installment schematic diagram of the present invention.
In figure: 1-helical runner, 2-driven unit, 3-returning charge chute, 4-support, 5-spill box, 6-hydraulic classiciation groove, 7-grinding groove, 8-returning charge dashpot, 9-riser, the ring-like hole of 10-.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail:
As shown in Figure 1 and Figure 4, coal-grinding apparatus of the present invention, comprise support 4, the inclination angle of laying of described coal-grinding apparatus support 4 is 25 ° ~ 45 °, support 4 is respectively equipped with coal-grinding container, by driven unit 2 that bearing connects rotatable helical runner 1 and is connected with coal-grinding container middle (center) bearing in coal-grinding container, as shown in Figure 2, gap between described coal-grinding container edge and helical runner 1 is 5 ~ 10mm, as shown in Figure 3, described helical runner 1 blade is met on charge level and is radially provided with multiple riser 9, helical runner 1 root of blade is provided with multiple ring-like hole 10, coal-grinding container side is provided with returning charge chute 3, described driven unit 2 is motor and driven wheel, it is characterized in that: described coal-grinding container comprises the grinding groove 7 that top half is opened wide, one end that grinding groove 7 is connected with driven unit 2 is laterally provided with returning charge dashpot 8, returning charge dashpot 8 is provided with discharging opening D, the other end of grinding groove 7 is provided with semi-open-type pyramid hydraulic classiciation groove 6, hydraulic classiciation groove 6 upper portion side wall is provided with charging aperture A, discharging opening D is consistent with the pointing direction of charging aperture A, the returning charge chute 3 making both link up is provided with between discharging opening D and charging aperture A, returning charge chute 3 is arranged on coal-grinding container outer wall, hydraulic classiciation groove 6 is provided with spill box 5, overfall B is provided with between hydraulic classiciation groove 6 and spill box 5, bottom spill box 5, sidewall is provided with discharging opening C.
A kind of coal-grinding method, its method is as follows:
A, first startup driven unit 2, driven unit 2 drives the coupled helical runner 1 be located in grinding groove 7 to start to rotate;
B, will treat that coal-grinding material adds in hydraulic classiciation groove 6 from the charging aperture A of hydraulic classiciation groove 6 upper portion side wall together with abrasive media, and to water filling in hydraulic classiciation groove 6; Described abrasive media is the ball medium of steel, excellent medium or irregular medium, is regularly supplemented by hydraulic classiciation groove 6 upper portion side wall charging aperture A;
C, treat duff grain in coal-grinding material helical runner 1 stir and hydraulic classiciation groove 6 hydraulic classiciation effect under, overflow from hydraulic classiciation groove 6 overfall B and enter in spill box 5, and discharged by sidewall discharging opening C bottom spill box 5 under gravity;
D, treat that rough coal grain in coal-grinding material to stir and under the acting in conjunction of carrying at helical runner 1, be promoted in grinding groove 7 by hydraulic classiciation trench bottom, be placed on the abrasive media grinding between helical runner 1, and drain in the returning charge dashpot 8 on grinding groove 7 top together with abrasive media;
E, rough coal grain and abrasive media enter hydraulic classiciation groove 6 upper portion side wall charging aperture A by sidewall discharging opening D bottom returning charge dashpot 8 through returning charge chute 3, return in grinding groove 7 again by helical runner 1 classified grinding, carry out next one circulation, until rough coal grain (≤0.3mm coal grain) be milled into fine grained (<0.3mm coal grain).
This technology makes the material meeting granularity requirements discharge lapping device in advance under hydraulic classiciation effect, milling medium and coarse-grained material are under the stirring and castering action of tilted-putted auger impeller, circulation is realized inside and outside coal-grinding apparatus, levigate material is discharged as early as possible, avoid ground pulverizing, reduce coal-grinding energy consumption simultaneously.Therefore, under the prerequisite of fine-grained gold deposit technology and coal-grinding cost constraint, research and develop this novel coal-grinding apparatus and method will provide technical support for the secondary efficient separation of middle coal resource.
Claims (6)
1. a coal-grinding apparatus, comprise support (4), (4) are respectively equipped with coal-grinding container to support, by driven unit (2) that screw bearing connects rotatable helical runner (1) and is connected with screw bearing in coal-grinding container in coal-grinding container, coal-grinding container side is provided with returning charge chute (3), described driven unit (2) is motor and driven wheel, it is characterized in that: described coal-grinding container comprises the grinding groove (7) that top half is opened wide, one end that grinding groove (7) is connected with driven unit (2) is laterally provided with returning charge dashpot (8), returning charge dashpot (8) is provided with discharging opening D, the other end of grinding groove (7) is provided with semi-open-type pyramid hydraulic classiciation groove (6), hydraulic classiciation groove (6) upper portion side wall is provided with charging aperture A, discharging opening D is consistent with the pointing direction of charging aperture A, the returning charge chute (3) making both link up is provided with between discharging opening D and charging aperture A, returning charge chute (3) is arranged on coal-grinding container outer wall, hydraulic classiciation groove (6) is provided with spill box (5), overfall B is provided with between hydraulic classiciation groove (6) and spill box (5), spill box (5) bottom sidewall is provided with discharging opening C.
2. coal-grinding apparatus according to claim 1, is characterized in that: described helical runner (1) blade is met on charge level and is radially provided with multiple riser (9), and helical runner (1) root of blade is provided with multiple ring-like hole (10).
3. coal-grinding apparatus according to claim 1 and 2, is characterized in that: the gap between described coal-grinding container edge and helical runner (1) is 5 ~ 10mm.
4. coal-grinding apparatus according to claim 1, is characterized in that: the inclination angle of laying of described coal-grinding apparatus support (4) is 25 ° ~ 45 °.
5. use a coal-grinding method for device described in claim 1, its technical characteristic is that method is as follows:
A, first start driven unit (2), driven unit (2) drives the coupled helical runner (1) be located in grinding groove (7) to start to rotate;
B, will treat that coal-grinding material adds in hydraulic classiciation groove (6) from the charging aperture A of hydraulic classiciation groove (6) upper portion side wall together with abrasive media, and to water filling in hydraulic classiciation groove (6);
C, treat duff grain in coal-grinding material helical runner (1) stir and hydraulic classiciation groove (6) hydraulic classiciation effect under, overflow from hydraulic classiciation groove (6) overfall B and enter in spill box (5), and discharged by spill box (5) bottom sidewall discharging opening C under gravity;
D, treat rough coal grain in coal-grinding material helical runner (1) stir and conveying acting in conjunction under, be promoted in grinding groove (7) by hydraulic classiciation trench bottom, be placed on the abrasive media grinding between helical runner (1), and drain in the returning charge dashpot (8) on grinding groove (7) top together with abrasive media;
E, rough coal grain and abrasive media enter hydraulic classiciation groove (6) upper portion side wall charging aperture A by returning charge dashpot (8) bottom sidewall discharging opening D through returning charge chute (3), return in grinding groove (7) again by helical runner (1) classified grinding, carry out next one circulation, until rough coal grain is milled into fine grained.
6. coal-grinding method according to claim 5, is characterized in that: described abrasive media is the ball medium of steel, excellent medium or irregular medium, is regularly supplemented by hydraulic classiciation groove (6) upper portion side wall charging aperture A.
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| CN201510376243.XA CN104941743B (en) | 2015-07-01 | 2015-07-01 | A kind of coal-grinding apparatus and method |
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| CN201510376243.XA CN104941743B (en) | 2015-07-01 | 2015-07-01 | A kind of coal-grinding apparatus and method |
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| CN104941743B CN104941743B (en) | 2017-08-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225041A (en) * | 2016-03-25 | 2017-10-03 | 贵州安顺惠海粉煤灰开发有限公司 | A kind of double helix frequency conversion classification thickness seperator and its separation method |
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| CN101391236A (en) * | 2008-10-25 | 2009-03-25 | 中国矿业大学 | Multi-product liquid-solid fluid bed separation classification device and method |
| RU2483806C1 (en) * | 2011-10-24 | 2013-06-10 | федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Южно-Российский государственный технический университет (Новочеркасский политехнический институт)" | COUNTERFLOW SEPARATOR FOR CONCENTRATION OF FINE COALS (0-3 mm) |
| CN203737590U (en) * | 2014-02-24 | 2014-07-30 | 中国矿业大学 | Novel gravity air classifier |
| CN104549708A (en) * | 2014-12-30 | 2015-04-29 | 中国矿业大学 | Spiral up-flow type liquid-solid fluidized bed separation equipment and method |
| CN204338307U (en) * | 2014-12-16 | 2015-05-20 | 中国矿业大学 | The spiral classifier that a kind of height of weir plate is adjustable |
-
2015
- 2015-07-01 CN CN201510376243.XA patent/CN104941743B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101391236A (en) * | 2008-10-25 | 2009-03-25 | 中国矿业大学 | Multi-product liquid-solid fluid bed separation classification device and method |
| RU2483806C1 (en) * | 2011-10-24 | 2013-06-10 | федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Южно-Российский государственный технический университет (Новочеркасский политехнический институт)" | COUNTERFLOW SEPARATOR FOR CONCENTRATION OF FINE COALS (0-3 mm) |
| CN203737590U (en) * | 2014-02-24 | 2014-07-30 | 中国矿业大学 | Novel gravity air classifier |
| CN204338307U (en) * | 2014-12-16 | 2015-05-20 | 中国矿业大学 | The spiral classifier that a kind of height of weir plate is adjustable |
| CN104549708A (en) * | 2014-12-30 | 2015-04-29 | 中国矿业大学 | Spiral up-flow type liquid-solid fluidized bed separation equipment and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107225041A (en) * | 2016-03-25 | 2017-10-03 | 贵州安顺惠海粉煤灰开发有限公司 | A kind of double helix frequency conversion classification thickness seperator and its separation method |
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| CN104941743B (en) | 2017-08-25 |
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Address after: 221116 No. 1 University Road, copper mountain, Jiangsu, Xuzhou Patentee after: China University of Mining & Technology Address before: 221116 Research Institute, China University of Mining and Technology, Xuzhou University, Jiangsu, China, Patentee before: China University of Mining & Technology |
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