CN104492582A - Vertical mill system - Google Patents
Vertical mill system Download PDFInfo
- Publication number
- CN104492582A CN104492582A CN201410798934.4A CN201410798934A CN104492582A CN 104492582 A CN104492582 A CN 104492582A CN 201410798934 A CN201410798934 A CN 201410798934A CN 104492582 A CN104492582 A CN 104492582A
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- Prior art keywords
- vertical mill
- powder concentrator
- mill
- air
- rotor
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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
- B02C15/00—Disintegrating by milling members in the form of rollers or balls co-operating with rings or discs
-
- 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
- B02C23/18—Adding fluid, other than for crushing or disintegrating by fluid energy
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The invention provides a vertical mill system. The vertical mill system comprises a vertical mill and a powder concentrator, wherein the powder concentrator comprises a rotor, the vertical mill comprises a millstone, a milling roller and a vertical mill shell, a primary air flow passage is formed between the millstone and the vertical mill shell; the edge of the millstone is provided with a screening device in a mill, which is used for separating overflow materials on the outer edge of the millstone roughly and finely, and maintaining the rough materials to be kept on the millstone and maintaining the leakage of fine materials; the externally leaked materials are divided into relatively fine materials which are carried by primary air and enter via the bottom of the powder concentrator and relatively rough materials sinking via the flow passage; a mechanical lifting device is used for lifting the sinking relatively rough materials to a material inlet in the top of the powder concentrator; secondary air enters the powder concentrator in a side air intake mode; the air rate of the secondary air/the air rate of the primary air is greater than or equal to 2. According to the vertical mill system, charging by the powder concentrator is realized by mechanical lifting and pneumatic conveying together; compared with the charging by complete pneumatic conveying in the prior art, the vertical mill system has the advantages that the electricity consumption is reduced; bottom air intake and side air intake are adopted for the powder concentrator, the secondary air directly enters the powder concentrator so as to prevent the resistance of the vertical mill from being lost, and the electricity consumption is reduced.
Description
Technical field
The present invention relates to a kind of material grinding technical field, be specifically related to a kind of vertical mill system.
Background technology
Vertical Mill, as a kind of key equipment of grinding system, is widely used in nonmetal grinding field.Motor is rotated by reductor band movable grinding disc, material falls mill central authorities from feed opening, move to mill edge under the influence of centrifugal force and be subject to rolling of grinding roller, material after pulverizing overflows from mill edge, brought to in the powder concentrator of Vertical Mill one from spout ring high speed thermal current upwards simultaneously, meal turns back on mill after separator sorting, again grinding; Fine powder then goes out mill with air-flow, collects, be product in the dust arrester installation of system.Compared with ball mill, in energy-conservation, there is obvious advantage.But compare roll squeezer, the grinding pow consumption of Vertical Mill is not preponderated.Through contrast discovery, because Vertical Mill inside adopts pneumatic conveying mode, for overcoming the resistance of spout ring and promoting the material in grinding, consume a large amount of energy.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of vertical mill system, and its power consumption is low.
In order to solve the problems of the technologies described above, technical scheme of the present invention is:
A kind of vertical mill system, comprise Vertical Mill and powder concentrator, powder concentrator comprises rotor, Vertical Mill comprises mill, grinding roller and vertical mill casing, it is the flow channels of First air between mill and vertical mill casing, mill outer rim is arranged overflows to mill outer rim the screening with in mill device that the material thick material stop of maintenance fine material on mill of carrying out thickness separation leaks outside, the fine material leaked outside be divided into by First air carry via enter bottom powder concentrator powder concentrator compared with fine material and through circulation road sink thicker material, mechanical lifting device by sink thicker material lifting to powder concentrator its top feed mouth, Secondary Air enters powder concentrator with side air inlet mode, Secondary Air air quantity/First air air quantity >=2.
Above-mentioned vertical mill system, rotor adopts cage-type rotor.
Above-mentioned vertical mill system, rotor comprises some first strip blades forming rotor circumference face and some second strip blades forming rotor end-face, first strip blade extends along rotor axial, first strip blade in the circumferential interval is arranged, it is the passage that wind and material pass through between adjacent first strip blade, the bearing of trend of the second strip blade is vertical with rotor axial, is the passage that wind and material pass through between adjacent second bar shaped blades.
Above-mentioned vertical mill system, residing for the first strip blade, plane does not pass through rotor axis.
Above-mentioned vertical mill system, First air should meet make material flow channels place attachment build up.
Above-mentioned vertical mill system, the wind speed of First air when circulation road is 1.0-1.5m/s.
Above-mentioned vertical mill system, screening with in mill device is the grate plate arranged along mill peripheral annual, and the axis of grate plate is consistent with mill axis.
Above-mentioned vertical mill system, the comb seam width of grate plate is 6-12mm.
Above-mentioned vertical mill system, is provided with spreading disk and buffer board in powder concentrator, powder concentrator motor adopts variable-frequency motor.
Above-mentioned vertical mill system, mechanical lifting device comprises the belt conveyor of horizontal and the bucket elevator of vertically-arranged, belt conveyor will sink and go out mill thicker material transfer to bucket elevator, bucket elevator is by material lifting to powder concentrator its top feed mouth, and belt conveyor has deironing apparatus.
First air by the fine material leaked outside comparatively fine material be blown in powder concentrator, remaining heavier thin material sinking, the mode through mechanical lifting after this part material goes out mill enters powder concentrator by top, and material is after powder concentrator, finished product enters dust arrester, and other material comes back to grinding in Vertical Mill.The present invention adopts mechanical lifting and Geldart-D particle jointly to realize powder concentrator charging, compares, reduce power consumption with existing complete Geldart-D particle charging; Powder concentrator adopts end air intake and side air intake, and Secondary Air directly enters powder concentrator and avoids drag losses through Vertical Mill, reduces power consumption.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is described in more detail:
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is structure chart of the present invention.
In figure: 01 Vertical Mill, 02 belt conveyor, 03 bucket elevator, 04 air valve, 05 powder concentrator, 06 sack cleaner, 07 air-introduced machine, 08 chimney, 09 First air, 10 Secondary Airs.
Detailed description of the invention
As depicted in figs. 1 and 2, vertical mill system comprises Vertical Mill 01 and powder concentrator 05.Powder concentrator comprises rotor.Vertical Mill comprises mill, grinding roller and vertical mill casing.Be the flow channels of First air 09 between mill and vertical mill casing, this place no longer arranges the very high winding-up ring of resistance.Mill outer rim arranges screening with in mill device, and screening with in mill device overflows material to mill outer rim and carries out thickness separation, keeps thick material stop fine material on mill to leak outside.The fine material leaked outside be divided into by First air carry via enter bottom powder concentrator powder concentrator compared with fine material and through circulation road sink thicker material, namely being blown afloat what send into powder concentrator by First air is comparatively fine material, and what First air cannot hold up sinking is thicker material.The thicker material lifting of sinking to powder concentrator its top feed mouth, is realized the mechanical lifting of material and its top feed of powder concentrator by mechanical lifting device.Secondary Air 10 enters powder concentrator with side air inlet mode, Secondary Air air quantity/First air air quantity >=2, and Secondary Air directly enters powder concentrator and air quantity is large compared with First air, and power consumption is low.
Rotor adopts cage-type rotor, for top-down material provides the chance of repeatedly sorting.Rotor comprises some first strip blades forming periphery and some second strip blades forming end face, first strip blade extends along rotor axial, first strip blade in the circumferential interval is arranged, it is the passage that wind and material pass through between adjacent first strip blade, the bearing of trend of the second strip blade is vertical with rotor axial, is the passage that wind and material pass through between adjacent second bar shaped blades.Residing for first strip blade, plane does not pass through rotor axis.
Wind speed basic demand for First air: First air should meet make material at flow channels place attachment build up, to make flow channels place remain unobstructed, First air effect is simultaneously sent in powder concentrator comparatively fine material.The wind speed of First air when circulation road is 1.0-1.5m/s.
Screening with in mill device is the grate plate arranged along mill peripheral annual, and the axis of grate plate is consistent with mill axis, overflows material carry out thickness separation to mill outer rim.Seam width of combing changes according to the fineness requirement of finished product, and the comb seam width of grate plate is 6-12mm.
Particularly, be provided with spreading disk and buffer board in powder concentrator, powder concentrator motor adopts variable-frequency motor, can change rotor of powder separator rotating speed.
Particularly, mechanical lifting device comprises the belt conveyor 02 of horizontal and the bucket elevator 03 of vertically-arranged, belt conveyor will sink and go out mill thicker material transfer to bucket elevator, bucket elevator by material lifting to powder concentrator its top feed mouth.Belt conveyor has deironing apparatus, the scum be used in separation of material.
As shown in Figure 1, the technological process of native system is:
1. the material of Vertical Mill enters in Vertical Mill 01 in the middle part of grinding machine, forms material bed under the influence of centrifugal force, under the relative motion of mill and grinding roller, is rolled into tiny particle;
2. continued under the influence of centrifugal force to the border movement of Vertical Mill 01 by the particle rolled.The edge of Vertical Mill 01 is provided with screening with in mill device, and coarse granule returns in mill and continues grinding, and fine grained is discharged to the blanking groove in mill in mill, and the particle that wherein part is fine, under the effect entering to grind hot blast (First air), enters powder concentrator.
3. Vertical Mill material is out by after air valve, and enter into belt feeder 02, head of belt conveyor is provided with strong magnet drum, the scum be used in separation of material.
4. material is delivered to elevator 03 by belt feeder 02, and material lifting to powder concentrator 05, is arranged air valve 04 in the import of powder concentrator by elevator 03.Material enters the spreading disk of powder concentrator and buffer board fully disperses, and falls into powder-separating area.Come First air and the Secondary Air of Self-air-heating, bottom powder concentrator, enter powder concentrator 05 with sidepiece respectively.At the cage-type rotor that powder concentrator 05 inside is made up of vertical vane and horizontal blade, make during revolution that whole powder-separating area inside and outside differential pressure maintains necessarily up and down, steady air current is even, for top-down material provides the chance of repeatedly sorting.Powder concentrator adopts variable-frequency motor, can adjust the rotating speed of powder concentrator.Fine powder enters into sack cleaner 06 along with air-flow, and meal is discharged from cone bottom and returned grinding machine and form closed-circuit grinding system.Because most of hot blast (Secondary Air) directly enters powder concentrator, therefore this powder concentrator has the function of oven dry simultaneously.
5. bag collector 06 is by material collection, and clean gas is discharged from chimney 08 by air-introduced machine 07.
From above-mentioned flow process, native system eliminates the very high winding-up ring of resistance, and in mill, material is mainly carried by elevator 03, save the power consumption of Geldart-D particle in mill, therefore, native system is by the basis of original vertical mill system, blower fan 07 can select the blower fan that pressure is little, power is low, thus saves power consumption.
Claims (10)
1. a vertical mill system, it is characterized in that: comprise Vertical Mill and powder concentrator, powder concentrator comprises rotor, Vertical Mill comprises mill, grinding roller and vertical mill casing, it is the flow channels of First air between mill and vertical mill casing, mill outer rim is arranged overflows to mill outer rim the screening with in mill device that the material thick material stop of maintenance fine material on mill of carrying out thickness separation leaks outside, the fine material leaked outside be divided into by First air carry via enter bottom powder concentrator powder concentrator compared with fine material and through circulation road sink thicker material, mechanical lifting device by sink thicker material lifting to powder concentrator its top feed mouth, Secondary Air enters powder concentrator with side air inlet mode, Secondary Air air quantity/First air air quantity >=2.
2. vertical mill system according to claim 1, is characterized in that: rotor adopts cage-type rotor.
3. vertical mill system according to claim 2, it is characterized in that: rotor comprises some first strip blades forming rotor circumference face and some second strip blades forming rotor end-face, first strip blade extends along rotor axial, first strip blade in the circumferential interval is arranged, it is the passage that wind and material pass through between adjacent first strip blade, the bearing of trend of the second strip blade is vertical with rotor axial, is the passage that wind and material pass through between adjacent second bar shaped blades.
4. vertical mill system according to claim 3, is characterized in that: residing for the first strip blade, plane does not pass through rotor axis.
5. vertical mill system according to claim 1, is characterized in that: First air should meet make material flow channels place attachment build up.
6. vertical mill system according to claim 5, is characterized in that: the wind speed of First air when circulation road is 1.0-1.5m/s.
7. vertical mill system according to claim 1, is characterized in that: screening with in mill device is the grate plate arranged along mill peripheral annual, and the axis of grate plate is consistent with mill axis.
8. vertical mill system according to claim 7, is characterized in that: the comb seam width of grate plate is 6-12mm.
9. vertical mill system according to claim 1, is characterized in that: be provided with spreading disk and buffer board in powder concentrator, and powder concentrator motor adopts variable-frequency motor.
10. the vertical mill system according to claim 1 or 9, it is characterized in that: mechanical lifting device comprises the belt conveyor of horizontal and the bucket elevator of vertically-arranged, belt conveyor will sink and go out mill thicker material transfer to bucket elevator, bucket elevator is by material lifting to powder concentrator its top feed mouth, and belt conveyor has deironing apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410798934.4A CN104492582A (en) | 2014-12-22 | 2014-12-22 | Vertical mill system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410798934.4A CN104492582A (en) | 2014-12-22 | 2014-12-22 | Vertical mill system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104492582A true CN104492582A (en) | 2015-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410798934.4A Pending CN104492582A (en) | 2014-12-22 | 2014-12-22 | Vertical mill system |
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| Country | Link |
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| CN (1) | CN104492582A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108927265A (en) * | 2018-08-13 | 2018-12-04 | 南京凯盛国际工程有限公司 | A kind of three-level screening scraper suitable for outer circulation Vertical Mill |
| CN111570064A (en) * | 2020-05-29 | 2020-08-25 | 中钢天源股份有限公司 | Fine-fraction dry powder making system and powder making process thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201799305U (en) * | 2010-09-02 | 2011-04-20 | 崔信明 | External circulation type vertical mill |
| CN103084259A (en) * | 2013-02-27 | 2013-05-08 | 南京凯盛国际工程有限公司 | Outer circulation type vertical mill system |
| CN203389707U (en) * | 2013-07-10 | 2014-01-15 | 中冶建筑研究总院有限公司 | Vertical type roller mill for grinding steel slag |
| CN203470115U (en) * | 2013-08-09 | 2014-03-12 | 成都建筑材料工业设计研究院有限公司 | High-water-content chalk drying grinding vertical mill |
| CN204338289U (en) * | 2014-12-22 | 2015-05-20 | 济南大学 | Vertical mill system |
-
2014
- 2014-12-22 CN CN201410798934.4A patent/CN104492582A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201799305U (en) * | 2010-09-02 | 2011-04-20 | 崔信明 | External circulation type vertical mill |
| CN103084259A (en) * | 2013-02-27 | 2013-05-08 | 南京凯盛国际工程有限公司 | Outer circulation type vertical mill system |
| CN203389707U (en) * | 2013-07-10 | 2014-01-15 | 中冶建筑研究总院有限公司 | Vertical type roller mill for grinding steel slag |
| CN203470115U (en) * | 2013-08-09 | 2014-03-12 | 成都建筑材料工业设计研究院有限公司 | High-water-content chalk drying grinding vertical mill |
| CN204338289U (en) * | 2014-12-22 | 2015-05-20 | 济南大学 | Vertical mill system |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108927265A (en) * | 2018-08-13 | 2018-12-04 | 南京凯盛国际工程有限公司 | A kind of three-level screening scraper suitable for outer circulation Vertical Mill |
| CN111570064A (en) * | 2020-05-29 | 2020-08-25 | 中钢天源股份有限公司 | Fine-fraction dry powder making system and powder making process thereof |
| CN111570064B (en) * | 2020-05-29 | 2024-01-26 | 中钢天源股份有限公司 | 2mm fine fraction dry powder preparation system and powder preparation process thereof |
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20150408 |