CN108686781A - A kind of spiral agitator suitable for low-density abrasive media - Google Patents
A kind of spiral agitator suitable for low-density abrasive media Download PDFInfo
- Publication number
- CN108686781A CN108686781A CN201810589652.1A CN201810589652A CN108686781A CN 108686781 A CN108686781 A CN 108686781A CN 201810589652 A CN201810589652 A CN 201810589652A CN 108686781 A CN108686781 A CN 108686781A
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- China
- Prior art keywords
- spiral agitator
- spiral
- agitating shaft
- grinding machine
- helical blade
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Classifications
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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
- B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
- B02C17/16—Mills in which a fixed container houses stirring means tumbling the charge
- B02C17/163—Stirring means
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Crushing And Grinding (AREA)
Abstract
The present invention provides a kind of spiral agitators suitable for low-density abrasive media; including agitating shaft (1); it is arranged with spiral helicine helical blade (2) on the agitating shaft (1); and the agitating shaft (1) is connected by bearing (4) with cylinder bottom (5), and seal protection cover (3) is enclosed between another agitating shaft (1) and bearing (4) to prevent ore pulp from penetrating into bearing (4).Spiral agitator of the present invention, abrasive media suitable for low-density, by reducing helix angle, to reduce the speed of medium ball vertical direction, reduce the amplitude that medium rolls up and down, medium ball increases the partial pressure of helical blade vertical direction simultaneously, and the top-down lamination for improving abrasive media increases grinding effect.Ratio of height to diameter by increasing blender can improve the edge linear velocity of helical blade under same rotational speed so that the velocity gradient in entire body increases, and to further enhance severity of grind, keeps the particle for being ground material thinner.
Description
Technical field
The present invention relates to mixing plant technical fields, and in particular to a kind of auger suitable for low-density abrasive media
Device.
Background technology
Tower grinding machine has been widely used in the fields such as ore grinding, cement, pigment as a kind of energy-efficient milling apparatus
Fine grinding and Ultrafine Grinding operation.The grinding process of tower grinding machine is that motor acts on power on spiral agitator by transmission device,
And power is passed to milling medium realizes grinding to blender with ore pulp again, achievees the purpose that efficient grinding material.Therefore, from mine
The loading angle of material and abrasive media ball sets out, and helix angle has a great impact to the vertical stress of medium ball, the height of spiral
The edge linear velocity that diameter compares helical blade is affected, and transmission shaft is connected with bottom cylinder can improve the stabilization of tower grinding machine
Property.
Present tower grinding machine is logical, and the most commonly used is density in 7-9g/cm3Steel ball, media density is larger, is suitable for high density
The spiral agitator of ball, helix angle and helical pitch are larger, can reduce the torque suffered by spiral agitator in this way, reduce grinding machine
Difficulty in starting reduces the abrasion of blender in operational process.Since steel ball density is larger, therefore useful load is big, results in grinding machine load
Lotus is big, ball consumes and high energy consumption.Present tower grinding machine is cantilevered spiral agitator, when the dielectric distribution in tower grinding mill barrel is uneven
When even, blender will appear larger swing, cause the shaking of grinding machine, to influence the service life of tower mill shaft and pedestal.
Invention content
For the above ordinary tower grinding machine spiral agitator there are the problem of, the present invention provides one kind be suitable for low-density
Abrasive media (3~5g/cm3Spherical), can significantly reduce the torque of helical axis, improve helical blade edge linear velocity,
Increase the spiral agitator of grinding machine stability.
In order to achieve the above purpose, the present invention provides a kind of spiral agitator suitable for low-density abrasive media,
Including agitating shaft, spiral helicine helical blade is arranged on the agitating shaft, and the agitating shaft is connected by bearing with cylinder bottom,
It is another that seal protection cover is enclosed between agitating shaft and bearing to prevent ore pulp from penetrating into bearing.
Further, wherein the helix angle of the helical blade is 10~17 °.
Further, wherein the edge of the helical blade is steel semicircular structure.
Further, wherein the spiral ratio of height to diameter value of the spiral agitator is 1.3~1.6.
Further, wherein the agitating shaft is connected with the motor of tower grinding machine, to drive the agitating shaft to rotate.
Further, wherein the spiral agitator is installed in the tower grinding machine.
Further, wherein it is 3~5g/cm to be filled with density in the tower grinding machine3Grinding spherical media.
Further, wherein the tower grinding machine in fill grinding spherical media heap volume account for cylinder volume 60%~
80%.
Further, wherein the grinding spherical media is selected from aluminium oxide ceramic ball, zirconia ceramics ball or spherical goose ovum
One kind in stone.
Further, wherein being ground material in the tower grinding machine accounts for the control of ore pulp mass percent 45~65%.
Spiral agitator provided by the present invention has the advantages that:
Spiral agitator of the present invention is suitable for the abrasive media of low-density, by reducing helix angle, to drop
The speed of low medium ball vertical direction reduces the amplitude that medium rolls up and down, while medium ball is to helical blade vertical direction
Partial pressure increases, and the top-down lamination for improving abrasive media increases grinding effect.By increasing the ratio of height to diameter of blender,
Under same rotational speed, the edge linear velocity of helical blade can be improved so that the velocity gradient in entire body increases, to further
Enhance severity of grind, keeps the particle for being ground material thinner.Moreover, agitating shaft is connected with cylinder bottom increases the steady of agitating shaft operating
It is qualitative, so that spiral agitator the phenomenon that swinging and shaking is not occurred, extends the service life of tower grinding machine.Use the grinding of low-density
Medium reduces total useful load of abrasive media in tower grinding machine, by the low torque of spiral agitator at runtime, saves electricity
Consumption reduces the abrasion of cylinder and blender.
Description of the drawings
Fig. 1 is one of the structural schematic diagram of spiral agitator provided by the invention;
Fig. 2 is the second structural representation of spiral agitator provided by the invention;
Fig. 3 is the connection diagram of the agitating shaft and cylinder bottom of the present invention;
Fig. 4 is the test result figure using the tower grinding machine of spiral agitator of the present invention;Wherein:SY-0 represent tower grinding machine to
Material;SY-1 represents general mixer and uses Ceramic Balls medium;SY-2 represents Novel mixer and uses Ceramic Balls medium;SY-3 is represented
General mixer uses steel ball medium.
Specific implementation mode
The present invention provides a kind of spiral agitators, illustrate specific implementation mode with specific embodiment below, should manage
Solution, the specific embodiments described herein are merely illustrative of the present invention, is not intended to limit the present invention.
Embodiment 1
Referring to Fig.1 shown in-Fig. 3, the present invention provides a kind of spiral agitators suitable for low-density abrasive media, including
Agitating shaft 1 is arranged with spiral helicine helical blade 2 on the agitating shaft 1, and the agitating shaft 1 passes through bearing 4 and 5 phase of cylinder bottom
Even, seal protection cover 3 is enclosed between another agitating shaft 1 and bearing 4 to prevent ore pulp from penetrating into bearing 4.
Wherein, the helix angle of the helical blade 2 is 10~17 °, if helix angle is more than 17, is likely to occur medium
The problem of centrifugation, centrifugation seriously can then make grinding effect decline very much;If small, medium can not promoted, and push down helical-blade
The edge of helical blade 2 described in piece is steel semicircular structure.The spiral ratio of height to diameter value of the spiral agitator is 1.3~1.6,
When medium is steel ball, spiral ratio of height to diameter value is preferably 1, can be made up in this way because Media density is low, and caused medium lamination is small
The problem of.
The agitating shaft 1 is connected with the motor of tower grinding machine, to drive the agitating shaft to rotate.
The spiral agitator is installed in the tower grinding machine.
It is 3~5g/cm that density is filled in the tower grinding machine3Grinding spherical media, if the density of grinding spherical media
More than 5g/cm3, then electric motor starting difficulty is may result in, the torque of the spiral agitator is big, reduces service life.
The grinding spherical media heap volume filled in the tower grinding machine accounts for 60%~80% (pack completeness) of cylinder volume, if
If the pack completeness is less than 60%, then grinding effect can be caused to decline, cylinder volume utilizes insufficient;If pack completeness is higher than 80%
If, abrasive media can sometimes be overflowed with ore pulp, if into next implement, damage equipment.
The one kind of the grinding spherical media in aluminium oxide ceramic ball, zirconia ceramics ball or spherical cobblestone.
It is ground material in the tower grinding machine and accounts for the control of ore pulp mass percent in 45~65% (ore milling concentrations) if ore grinding
When concentration is less than 45%, medium effective percentage in ore pulp increases, therefore impact force between medium and abrasive power are relatively strong, adhesion
Material around medium is less, and the efficiency that material is ground reduces;If ore milling concentration is higher than 65%, the effective percentage of medium
It reduces, but pulp viscosity increases, the material adhered around medium increases, and grinding efficiency improves.But when ore milling concentration is excessively high, ore pulp
Mobility reduce, increase ore discharge difficulty.
Experimental test has been carried out to the performance of spiral agitator of the present invention below.
The power of motor of tower grinding machine used in experiment is 7kw, and the cylinder volume of tower grinding machine is 120L, is tested handled
Ore is magnetic iron ore, accounts for the control of ore pulp mass percent 60% by magnetic iron ore, used experiment is low-density abrasive media
(Ceramic Balls 3.72g/cm3) and high-density milling medium (steel ball 7.85g/cm3), the sphere diameter of the medium used is all 20mm, cylinder
The grinding spherical media heap volume of interior filling accounts for the 75% of cylinder volume.Blender is that (helix angle is normal spiral blender
30 °, spiral ratio of height to diameter value is that 1.0) (helix angle of spiral agitator is 14 °, spiral Gao Jing with the spiral agitator of the present invention
Ratio is 1.5) grinding time 30min, and the granularity of raw material and ground prod is tested using Mastersizer 2000,
Test result is as shown in table 1 and Fig. 4.
1 site test results of table compare
Find out from table 1 and Fig. 4, same normal spiral blender, is applicable in the Ceramic Balls medium of low-density and highdensity
The treating capacity that the comparison of steel ball medium can be seen that grinding machine does not change, and uses the fineness of highdensity abrasive media ground prod
It is thinner, but the power of motor obviously rises.When equally applicable Ceramic Balls abrasive media, normal spiral blender and Novel spiral
Although the comparison of blender is as can be seen that the power of motor of tower grinding machine slightly has rising, the common spiral shell of fineness ratio of ground prod
Revolve blender using the thinner of high-density medium, improve the mill efficiency of tower grinding machine.Meanwhile in the spiral using the present invention
Blender, when steel ball grinding medium is added, since the density of steel ball is too high, the ratio of height to diameter of spiral agitator is too big, leads to grinding machine
Difficulty in starting, even if after starting, there is larger shaking in grinding machine, and the spiral agitator further illustrated the present invention is suitble to low close
The abrasive media of degree.
Finally it should be noted that:Above-described embodiments are merely to illustrate the technical scheme, rather than to it
Limitation;Although the present invention is described in detail referring to the foregoing embodiments, it will be understood by those of ordinary skill in the art that:
It can still modify to the technical solution recorded in previous embodiment, or to which part or all technical features into
Row equivalent replacement;And these modifications or substitutions, it does not separate the essence of the corresponding technical solution various embodiments of the present invention technical side
The range of case.
Claims (10)
1. a kind of spiral agitator suitable for low-density abrasive media, which is characterized in that including agitating shaft (1), the stirring
Spiral helicine helical blade (2) is arranged on axis (1), and the agitating shaft (1) is connected by bearing (4) with cylinder bottom (5), is separately stirred
It mixes and is enclosed with seal protection cover (3) between axis (1) and bearing (4) to prevent ore pulp from penetrating into bearing (4).
2. spiral agitator as described in claim 1, which is characterized in that the helix angle of the helical blade (2) be 10~
17°。
3. spiral agitator as described in claim 1, which is characterized in that the edge of the helical blade (2) is steel semicircle
Shape structure.
4. spiral agitator as described in claim 1, which is characterized in that the spiral ratio of height to diameter value of the spiral agitator is
1.3~1.6.
5. spiral agitator as described in claim 1, which is characterized in that the agitating shaft (1) is connected with the motor of tower grinding machine,
To drive the agitating shaft to rotate.
6. spiral agitator as claimed in claim 5, which is characterized in that the spiral agitator is installed on the tower grinding machine
It is interior.
7. spiral agitator as claimed in claim 6, which is characterized in that it is 3~5g/cm to be filled with density in the tower grinding machine3
Grinding spherical media.
8. spiral agitator as claimed in claim 7, which is characterized in that the grinding spherical media heap filled in the tower grinding machine
Volume accounts for the 60%~80% of cylinder volume.
9. spiral agitator as claimed in claim 8, which is characterized in that the grinding spherical media is selected from aluminium oxide ceramics
One kind in ball, zirconia ceramics ball or spherical cobblestone.
10. spiral agitator as claimed in claim 6, which is characterized in that be ground material in the tower grinding machine and account for ore pulp matter
Percentage control is measured 45~65%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810589652.1A CN108686781A (en) | 2018-06-08 | 2018-06-08 | A kind of spiral agitator suitable for low-density abrasive media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810589652.1A CN108686781A (en) | 2018-06-08 | 2018-06-08 | A kind of spiral agitator suitable for low-density abrasive media |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108686781A true CN108686781A (en) | 2018-10-23 |
Family
ID=63849682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810589652.1A Pending CN108686781A (en) | 2018-06-08 | 2018-06-08 | A kind of spiral agitator suitable for low-density abrasive media |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404635A (en) * | 2019-08-05 | 2019-11-05 | 东北大学 | A kind of fluidization vertical stirring mill suitable for dry type grinding |
| CN111701495A (en) * | 2020-06-16 | 2020-09-25 | 中国矿业大学(北京) | Waste battery electrode powder separation and recovery device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110404635A (en) * | 2019-08-05 | 2019-11-05 | 东北大学 | A kind of fluidization vertical stirring mill suitable for dry type grinding |
| CN111701495A (en) * | 2020-06-16 | 2020-09-25 | 中国矿业大学(北京) | Waste battery electrode powder separation and recovery device |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181023 |