CN107537699A - A kind of device for filling in flotation column section - Google Patents
A kind of device for filling in flotation column section Download PDFInfo
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- CN107537699A CN107537699A CN201710817008.0A CN201710817008A CN107537699A CN 107537699 A CN107537699 A CN 107537699A CN 201710817008 A CN201710817008 A CN 201710817008A CN 107537699 A CN107537699 A CN 107537699A
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- sieve plate
- flotation column
- circular hole
- filling
- aperture
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Abstract
The invention discloses the device for filling in a kind of flotation column section, including being arranged on the sieve plate layer to match in flotation column with flotation column dimension, the sieve plate layer includes one layer of uniform sieve plate for being arranged on flotation column top and one to three layer of non-homogeneous sieve plate for being arranged on flotation column bottom, is supported between two layers adjacent of sieve plate by water conservancy diversion pipe；The circular hole of the radially arranged different pore size of non-homogeneous sieve plate, wherein, central area A and sieve plate fringe region B circular hole aperture are smaller, and region C circular holes aperture therebetween is larger, the circular hole aperture in a-quadrant to C regions becomes larger, and the circular hole aperture in C regions to B area tapers into；The circular hole of radially even arrangement same apertures on uniform sieve plate.The present invention is set according to the rule of fluid, therefore the distribution of bubble can be made more uniform, and rectification effect more preferably, so as to effectively improve separating effect, and increases the dischargeable capacity in flotation column, increases ore pulp flux, prevent from blocking.
Description
Technical field
The present invention relates to a kind of flotation column, and in particular to the device for filling in a kind of flotation column section, belongs to ore dressing and sets
Standby technical field.
Background technology
Cyclonic-static fine-bubble flotation column is a kind of new pillar screening installation with China's independent intellectual property right, and it is special
Some steps optimization separating structure makes COLUMN TECHNOLOGY be succeeded in terms of China's sorting mineral application, is particularly suitable for use in fine
The flotation of grain mineral.Step optimization sorting includes post flotation, rotational flow sorting, pipe stream mineralising three parts, correspond to flotation column respectively
Post flotation section, eddy flow section and pipe stream section.Equipment body is cylindrical, and post flotation section connects with rotational flow sorting section into up-down structure is straight-through
Connect, pipe stream mineralization device is arranged in outside equipment cylinder, tangentially connected with rotational flow sorting section, when ore pulp is tangentially entered at a high speed by pipe stream section
When entering eddy flow section, the centrifugal force field of high intensity will be produced, it is final to realize so as to strengthen the collision between fine-particle minerals and bubble
Improve the purpose of flotation recovery rate.For the post flotation section on top, it is desirable in static fluid environment, ore deposit is collided using adverse current
Change floating principle, realize that the mineralising of fine-particle minerals traps and plays selected centrifugation simultaneously, therefore, in order to ensure that adverse current is touched
Hitting mineralising can smoothly be carried out, and then improve the efficiency of separation, need that plunger stream mode is presented in post flotation section.But due to post
Flotation section goes to upper and lower structure with eddy flow section and is connected, so strong cyclone field can move up and spread to post flotation section, this certainly will be
Post flotation section produces strong eddy flow, maelstrom etc. and is unfavorable for the fluid environment of static separation, and then can deteriorate adverse current collision mineralising
Effect and concentrate quality.
In order to solve this strong cyclone field separated with the static of post flotation between contradiction, prior art use in eddy flow
The technology that sorting section is filled, filling medium mainly include two kinds of yarn quality index and filling packing.Filling packing fills with sieve plate
Fill out compared to more efficient, but its ore pulp handling capacity is small, not only easily blocks, and also cost is high, and installation is difficult in maintenance；And
Sieve plate has the advantages that simple in construction, low cost, but rectification effect is poor, and filling effect is limited.
The method of also a kind of comprehensive yarn quality index and filling packing, i.e., use filling packing in the selected area of post flotation section,
Yarn quality index is used in rotational flow sorting area, the material space that enters between the two does not fill, and sieve plate is advantageous to stable foam layer, suppresses machine
Tool is carried secretly and mixed, and filler is advantageous to improve the recovery ability and sorting selectivity of post flotation section.But filled in this mixing
In filling out, the hole on sieve plate is uniformly arranged, i.e., aperture is identical with pitch of holes, and the bubble disperse in post flotation section is in uneven
State, individual layer sieve plate rectification effect is limited, therefore would generally set more than six layers of sieve plate, can so reduce the effective of flotation column
Volume, and cost is high, later maintenance is difficult.
The content of the invention
To solve the above problems, the present invention provides the device for filling in a kind of flotation column section, flotation can be effectively improved
The uneven disperse situation of bubble, filling effect is good, improves the efficiency of separation of flotation column, and the device ore pulp flux is big, is not easy
Block, simple in construction, cost is relatively low, easy to maintain.
Device for filling in a kind of flotation column section of the present invention, including be arranged in flotation column and flotation column dimension phase
The sieve plate layer matched somebody with somebody, the sieve plate layer include being arranged on one layer of uniform sieve plate on flotation column top and are arranged on the one of flotation column bottom
Straight three layers of non-homogeneous sieve plate, supported by water conservancy diversion pipe between two layers adjacent of sieve plate；The non-homogeneous sieve plate is radially arranged
The circular hole of different pore size, wherein, central area A and sieve plate fringe region B circular hole aperture are smaller, region C circles therebetween
Hole aperture is larger, and the circular hole aperture of a-quadrant to C regions becomes larger, and the circular hole aperture in C regions to B area tapers into；Uniformly
The circular hole of radially even arrangement same apertures on sieve plate.
After entering pressurized circulation pump by the recirculated water of flotation column cyclonic separation section discharge, high-speed jet is converted into by nozzle
And a large amount of gases are introduced, the bubble of high degree of dispersion is then formed by bubble generator, bubble population is in the presence of jet and eddy flow
Moved around post central axis spiral, obvious axial eddy is formed, it can be seen from fluid mechanics principle, in post jamb face and axle
The axial velocity of heart regional fluid is high, and region axial velocity between the two is low, the aperture on sieve plate can make fluid by
For certain resistance so as to produce pressure drop, aperture is smaller, and pressure drop is bigger, and aperture is bigger, and pressure drop is smaller；Therefore, in order that bubble point
Dissipate more uniformly, so as to improve sorting mineral efficiency, the uneven sieve plate that the present invention is set can be according to fluid in flotation column point
The different circular holes that different pore size is set of axial velocity in selections；Aperture on sieve plate is except that can make fluid be produced by resistance
Outside the effect of pressure drop, also have the function that to eliminate eddy flow, it can be seen from fluid mechanics principle, fluid is angled into flotation
During post, the wherein tangential velocity highest in side wall region, and the tangential velocity of central area is minimum, is set on uneven sieve plate different
Aperture make " steering " effect that fluid is subject to different, therefore when tangential velocity is bigger, arrangement aperture should be smaller, conversely, aperture
Ying Yue great；In post flotation section short transverse, closer to lower section, eddy flow section bubble disperse degree of irregularity is more serious, therefore under
Portion arranges that one to three layer of non-homogeneous sieve plate is used for the uneven disperse situation for improving flotation bubble, and top sets one layer of uniformly sieve
Plate, for stable foam layer.
Further, a diameter of D of flotation column, the C regions a diameter of 0.2~0.3D of inner circle, outside diameter be 0.6~
0.8D。
The problems such as considering rectification effect, the structural strength of sieve plate, aperture can not be too small, can not be excessive, therefore non-
Aperture is 5-15mm, pitch of holes 1.5-3mm, plate thickness 5-10mm on uniform sieve plate, and pore size is according to above-mentioned rule
Subregion is restrained to set.
Further, aperture is 5-15mm, pitch of holes 1.5-3mm, plate thickness 5-10mm on uniform sieve plate.
Further, spacing is 0.5~1.5D between adjacent two layers sieve plate.
Further, four water conservancy diversion pipes are provided between adjacent two layers sieve plate, are uniformly located at the edge of sieve plate；The water conservancy diversion
Diameter d≤0.1D of pipe.Mozzle is used to support two layers adjacent of sieve plate, and its diameter is smaller, therefore it is limited to take up space,
The dischargeable capacity of flotation column is not influenceed.
Traditional uniform sieve plate filling is that the flowing of ore pulp pair in cylinder is planned using rule sieve aperture on uniform sieve plate mostly
Property, make fluid from disorder to order, and the angle of inclination of bubble ascending path is varied multiple times by different height sieve aperture, extend gas
Bubble rises distance, promotes mineral grain mineralising；And instant invention overcomes conventional technology prejudice, using on non-homogeneous sieve plate not
With pore size sieve aperture and combine fluid rule, make fluid bubble disperse more uniformly, in order, and not rely on rule
Sieve aperture is planned, and the angle of inclination of bubble is varied multiple times in can on same layer sieve plate, reduces the merger of bubble, is promoted
Collision adhesion between mineral grain and bubble, so as to substantially increase flotation efficiency；Device for filling provided by the invention, it is and normal
The filling medium of the even structures such as rule sieve plate, honeycomb duct is compared, and it designs the hydrodynamics combined in flotation column, according to stream
The rule of body is set, therefore the distribution of bubble can be made more uniform, and rectification effect is more preferably；And due to uneven sieve plate compared to
Uniform sieve plate can be with significantly more efficient elimination eddy flow, therefore can reduce the arrangement number of plies of sieve plate, so as to increase in flotation column
Dischargeable capacity, increase ore pulp flux, prevent from blocking, while also reduce installation and maintenance workload, reduce production cost.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the top view of non-homogeneous sieve plate in Fig. 1；
Fig. 3 is the top view of uniform sieve plate in Fig. 1；
Fig. 4 is motion pattern in unfilled flotation column；
Axial velocity profile curve map when Fig. 5 is unfilled；
Tangential velocity scatter chart when Fig. 6 is unfilled；
Fig. 7 contrasts form for velocity standard deviation before and after filling；
In figure：1st, flotation column, 2, uniform sieve plate, 3, non-homogeneous sieve plate, 4, water conservancy diversion pipe.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
As shown in Figures 1 to 3, the device for filling in a kind of flotation column section, including be arranged in flotation column 1 and flotation column
The sieve plate layer that size matches, the sieve plate layer include being arranged on one layer of uniform sieve plate 2 on flotation column top and are arranged on flotation
One to three layer of non-homogeneous sieve plate 3 of post bottom, supported by water conservancy diversion pipe 4 between two layers adjacent of sieve plate；The non-homogeneous sieve
The circular hole of 3 radially arranged different pore size of plate, wherein, central area A and sieve plate fringe region B circular hole aperture are smaller, the two
Between region C circular holes aperture it is larger, the circular hole aperture of a-quadrant to C regions becomes larger, the circular hole aperture in C regions to B area
Taper into；The circular hole of radially even arrangement same apertures on uniform sieve plate 2.
Embodiment sets two layers of non-homogeneous sieve plate, one layer of uniform sieve plate in figure.
After entering pressurized circulation pump by the recirculated water of flotation column cyclonic separation section discharge, high-speed jet is converted into by nozzle
And a large amount of gases are introduced, then there is the bubble that bubble generator forms high degree of dispersion, as shown in figure 4, bubble population is in jet and rotation
Moved in the presence of stream around post central axis spiral, form obvious axial eddy, it can be seen from fluid mechanics principle, such as
It is high in the axial velocity of post jamb face and central core region fluid shown in Fig. 5, and region axial velocity between the two is low, on sieve plate
Aperture can make fluid by certain resistance so as to produce pressure drop, aperture is smaller, and pressure drop is bigger, and aperture is bigger, and pressure drop is got over
It is small；Therefore in order that bubble is scattered more uniformly, so as to improve sorting mineral efficiency, the uneven sieve plate that the present invention is set can be with
According to the different circular holes for setting different pore size of fluid axial velocity in flotation column section；Aperture on sieve plate is except can be with
Make fluid receive resistance to produce outside the effect of pressure drop, also have the function that to eliminate eddy flow, it can be seen from fluid mechanics principle, such as scheme
Shown in 6, when fluid is angled into flotation column, the wherein tangential velocity highest in side wall region, and central area is tangential
Speed is minimum, and " steering " effect for setting different apertures to be subject to fluid on uneven sieve plate is different, therefore tangential velocity is got over
When big, arrangement aperture should be smaller, conversely, aperture should be bigger；In post flotation section short transverse, closer to lower section eddy flow section bubble
Disperse degree of irregularity is more serious, therefore in one to three layer of non-homogeneous sieve plate of lower disposed for improving the uneven of flotation bubble
Disperse situation, top sets one layer of uniform sieve plate, for stable foam layer.
Further, 1 a diameter of D of flotation column, the C regions a diameter of 0.2~0.3D of inner circle, outside diameter be 0.6~
0.8D。
The problems such as considering rectification effect, the structural strength of sieve plate, aperture can not be too small, can not be excessive, therefore non-
Aperture is 5-15mm, pitch of holes 1.5-3mm, plate thickness 5-10mm on uniform sieve plate 3, and pore size is according to above-mentioned rule
Subregion is restrained to set.
Further, aperture is 5-15mm, pitch of holes 1.5-3mm, plate thickness 5-10mm on uniform sieve plate 2.
Further, 1 a diameter of D of flotation column, spacing is 0.5~1.5D between adjacent two layers sieve plate.
Further, four water conservancy diversion pipes 4 are provided between adjacent two layers sieve plate, are uniformly located at the edge of sieve plate；It is described to lead
Flow diameter d≤0.1D of pipe 4.Mozzle is used to support two layers adjacent of sieve plate, and its diameter is smaller, therefore takes up space and have
Limit, the dischargeable capacity of flotation column is not influenceed.
In order to be verified to the effect of apparatus of the present invention, using Fluent17.0 softwares, Numerical Experiment pair is utilized
One layer of uniform sieve plate of arrangement and one layer of non-homogeneous yarn quality index effect are contrasted, wherein the circular hole aperture on uniform sieve plate is
10mm, the circular hole aperture on non-homogeneous sieve plate is 9~12mm, and the column diameter of stream-static microbubble floatation column is 190mm, a height of
1400mm。
After numerical simulation terminates, choose the speed in post flotation section in sustained height plane and contrasted, comparing result is such as
Shown in Fig. 7.As seen from Figure 7, after non-homogeneous yarn quality index, the standard deviation of axial velocity and tangential velocity is below uniform
Half during filling, it is seen that during using non-homogeneous yarn quality index, speed field distribution is more preferably uniform, and positive effect is better than uniform sieve plate
Filling, so that bubble disperse is more uniform.
Claims (6)
1. the device for filling in a kind of flotation column section, including it is arranged on what is matched in flotation column (1) with flotation column dimension
Sieve plate layer, it is characterised in that the sieve plate layer includes being arranged on one layer of uniform sieve plate (3) on flotation column top and is arranged on flotation
One to three layer of non-homogeneous sieve plate (2) of post bottom, pass through water conservancy diversion pipe (4) between two layers adjacent of sieve plate and support；It is described non-equal
The circular hole of the radially arranged different pore size of even sieve plate (2), wherein, central area A and sieve plate fringe region B circular hole aperture compared with
Small, region C circular holes aperture therebetween is larger, and the circular hole aperture of a-quadrant to C regions becomes larger, C regions to B area
Circular hole aperture tapers into；The circular hole of radially even arrangement same apertures on uniform sieve plate (3).
2. the device for filling in flotation column section as claimed in claim 1, it is characterised in that flotation column (1) a diameter of D,
The C regions a diameter of 0.2~0.3D of inner circle, outside diameter are 0.6~0.8D.
3. the device for filling in flotation column section as claimed in claim 2, it is characterised in that hole on non-homogeneous sieve plate (2)
Footpath is 5~15mm, and pitch of holes is 1.5~3mm, and plate thickness is 5~10mm.
4. the device for filling in flotation column section as claimed in claim 3, it is characterised in that aperture on uniform sieve plate (3)
For 5~15mm, pitch of holes is 1.5~3mm, and plate thickness is 5~10mm.
5. the device for filling in flotation column section as claimed in claim 4, it is characterised in that between adjacent two layers sieve plate
Away from for 0.5~1.5D.
6. the device for filling in flotation column section as described in claim 1 to 5 any claim, it is characterised in that phase
Four water conservancy diversion pipes (4) are provided between adjacent two layers of sieve plate, are uniformly located at the edge of sieve plate；The diameter d of the water conservancy diversion pipe (4)≤
0.1D。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710817008.0A CN107537699B (en) | 2017-09-12 | 2017-09-12 | A kind of device for filling in flotation column section |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710817008.0A CN107537699B (en) | 2017-09-12 | 2017-09-12 | A kind of device for filling in flotation column section |
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| Publication Number | Publication Date |
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| CN107537699A true CN107537699A (en) | 2018-01-05 |
| CN107537699B CN107537699B (en) | 2019-04-02 |
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| CN201710817008.0A Active CN107537699B (en) | 2017-09-12 | 2017-09-12 | A kind of device for filling in flotation column section |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109290069A (en) * | 2018-09-25 | 2019-02-01 | 北矿机电科技有限责任公司 | A kind of device that froth bed intensity increases |
| CN109453903A (en) * | 2018-11-23 | 2019-03-12 | 中南大学 | Filled type flotation column |
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| CN2431047Y (en) * | 2000-07-07 | 2001-05-23 | 中国矿业大学（北京校区） | Bidirectionally inflating jet flotation column |
| CN205323989U (en) * | 2016-01-09 | 2016-06-22 | 山东莱芜煤矿机械有限公司 | Small -size inflatable flotation column testing machine |
| CN106076660A (en) * | 2016-06-03 | 2016-11-09 | 武汉工程大学 | A kind of flotation column equipment and method for separating |
| BR202015024339U2 (en) * | 2015-09-22 | 2017-03-28 | Pontual Consultoria Empresarial Pesquisa E Desenvolvimento Mineral Ltda Me | double aeration flotation column |
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2017
- 2017-09-12 CN CN201710817008.0A patent/CN107537699B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2431047Y (en) * | 2000-07-07 | 2001-05-23 | 中国矿业大学（北京校区） | Bidirectionally inflating jet flotation column |
| BR202015024339U2 (en) * | 2015-09-22 | 2017-03-28 | Pontual Consultoria Empresarial Pesquisa E Desenvolvimento Mineral Ltda Me | double aeration flotation column |
| CN205323989U (en) * | 2016-01-09 | 2016-06-22 | 山东莱芜煤矿机械有限公司 | Small -size inflatable flotation column testing machine |
| CN106076660A (en) * | 2016-06-03 | 2016-11-09 | 武汉工程大学 | A kind of flotation column equipment and method for separating |
Non-Patent Citations (1)
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| 路阳 等: "浮选柱充填及筛板作用分析", 《煤炭技术》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109290069A (en) * | 2018-09-25 | 2019-02-01 | 北矿机电科技有限责任公司 | A kind of device that froth bed intensity increases |
| CN109453903A (en) * | 2018-11-23 | 2019-03-12 | 中南大学 | Filled type flotation column |
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| Publication number | Publication date |
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| CN107537699B (en) | 2019-04-02 |
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