CN106294988A - A kind of determine the hydrocyclone method to ore deposit pressure - Google Patents
A kind of determine the hydrocyclone method to ore deposit pressure Download PDFInfo
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- CN106294988A CN106294988A CN201610644520.5A CN201610644520A CN106294988A CN 106294988 A CN106294988 A CN 106294988A CN 201610644520 A CN201610644520 A CN 201610644520A CN 106294988 A CN106294988 A CN 106294988A
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- hydrocyclone
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Abstract
The present invention provides a kind of and determines the hydrocyclone method to ore deposit pressure, comprises determining that the structural parameters of hydrocyclone under target operating condition, the density of material to be fractionated, granularmetric composition and on-the-spot feedstock concentrations；3 d modeling software is used to set up territory, the flow field computation model of hydrocyclone, and by discrete for its grid；The grid generated is imported in cfdrc Fluent software, sets the boundary condition of territory, flow field computation model, and liquid phase viscosity is set, carry out numerical computations；Extract from numerical result and analyze different to short-circuit flow and turbulence intensity the air column of hydrocyclone interior flow field, zero-speed enveloping surface, the lid during pressure of ore deposit, determine that under hydrocyclone target operating condition, optimum is to ore deposit pressure；The present invention is directed to objectives operating mode, fully examine or check the structural parameters of hydrocyclone under this operating mode, the density of material to be fractionated, granularmetric composition and on-the-spot feedstock concentrations, determined by hydrocyclone be more suitable for produced on-site to ore deposit pressure.
Description
Technical field
The present invention relates to hydrocyclone technical field, a kind of determine the hydrocyclone method to ore deposit pressure.
Background technology
Hydrocyclone is the most widely used classifying equipoment in current ore dressing plant, hydroclone classification effect direct relation
To ore dressing plant mineral processing index and economic benefit.Hydrocyclone to ore deposit pressure be affect hydroclone classification effect important because of
Element, to ore deposit pressure zone of reasonableness to be in, can not be too low and affect classification efficiency, again can not be too high and waste energy consumption.
At present, ore dressing plant hydrocyclone usually relies on empirical equation to ore deposit pressure or uses for reference similar production scene really
Fixed, these determine that method, all with hydroclone classification product as distinguishing rule, does not accounts for cyclone interior flow field characteristic, and
Hydroclone classification result is determined by interior flow field exactly, therefore determines suitably to ore deposit based on its interior flow field characteristic
Pressure, practical and there is more pinpoint accuracy, it is thus possible to ensure that hydrocyclone is in optimum Working, give full play to from
Body advantage.
Summary of the invention
The problem existed for prior art, the present invention provides a kind of and determines the hydrocyclone method to ore deposit pressure.
Technical scheme is as follows:
A kind of determine the hydrocyclone method to ore deposit pressure, comprise the steps:
Step 1, determine the structural parameters of hydrocyclone under target operating condition, the density of material to be fractionated, granularmetric composition and
On-the-spot feedstock concentrations；
The structural parameters of described hydrocyclone include: mineral-feeding pipe diameter, shell of column diameter, shell of column height, cone angle, spigot
Diameter, overflow diameter, overflow pipe insertion depth, overflow pipe wall thickness；
The density of described material to be fractionated refers to the true density of material to be fractionated；
The granularmetric composition of described material to be fractionated refers to the percetage by weight of each grade in material to be fractionated；
Step 2, structural parameters according to hydrocyclone described in step 1, use 3 d modeling software SolidWorks soft
Part sets up territory, the flow field computation model of hydrocyclone, and utilize ANSYS Meshing software by discrete for its grid, generated net
Lattice torsion resistance should be not higher than 0.8；
Step 3, grid step 2 generated import in cfdrc Fluent software, set territory, flow field
The boundary condition of computation model, and liquid phase viscosity is set, carry out numerical computations subsequently；
Described boundary condition includes pressure entrance and the pressure outlet of hydrocyclone, and wherein pressure entrance is set to
Difference between 0.05MPa～0.20MPa is set to local standard atmospheric pressure to ore deposit pressure, pressure outlet；
Described liquid phase viscosityWherein, μwFor the viscosity of water, v-10μmVolume integral for-10 μm granules
Number, coefficient n=0.5～0.7；
Step 4, numerical result obtained by step 3 extract and analyze different in hydrocyclone during the pressure of ore deposit
The lower short-circuit flow of the air column in flow field, portion, zero-speed enveloping surface, lid and turbulence intensity, determine optimum under hydrocyclone target operating condition
To ore deposit pressure；
Under described hydrocyclone target operating condition, to ore deposit pressure, optimum refers to that corresponding hydrocyclone interior flow field is special
Property meet simultaneously: Air core diameter and the settling mouth of hydrocyclone diameter ratio of cone section part are less than 1；Cone section part zero-speed bag
Network face does not surpasses without the vertical dimension ratio of the point on zero-speed enveloping surface at chamfering, and cone section 1/2 to hydrocyclone central axis
Cross 1.25；The lower short-circuit flow flow velocity of lid is not higher than 1m/s；Turbulence intensity peak is not higher than 1.
Beneficial effect:
1, for objectives operating mode, the structural parameters of hydrocyclone under this operating mode, material to be fractionated are fully examined or check
Density, granularmetric composition and on-the-spot feedstock concentrations, compared with relying on empirical equation or use for reference the method at similar scene, determined in the past
Hydrocyclone be more suitable for produced on-site to ore deposit pressure.
2, the present invention determine based on the flow field characteristic determining hydroclone classification result suitable to ore deposit pressure, therefore
Result is more accurate.
3, the present invention utilizes Numerical Computer Simulation to replace the operations such as loaded down with trivial details manual sampling, analysis, more convenient soon
Victory, and use manpower and material resources sparingly.
4, hydroclone classification result is determined by interior flow field, therefore determines suitable based on its interior flow field characteristic
Preferably give ore deposit pressure, practical and there is more pinpoint accuracy, it is thus possible to ensure that hydrocyclone is in optimum Working, fully
Exert advantages of oneself.
Accompanying drawing explanation
Fig. 1 is air column to ore deposit pressure to be affected schematic diagram in the specific embodiment of the invention, and (a) is to ore deposit pressure
0.05MPa on the impact of air column, (b) be to ore deposit pressure 0.08MPa on the impact of air column, (c) for ore deposit pressure 0.11MPa
It is to the ore deposit pressure 0.14MPa impact on air column on the impact of air column, (d)；
Fig. 2 is zero-speed enveloping surface to ore deposit pressure to be affected schematic diagram in the specific embodiment of the invention, and (a) be to ore deposit pressure
Strong 0.05MPa be to be to ore deposit to ore deposit pressure 0.08MPa on impact, (c) of zero-speed enveloping surface on the impact of zero-speed enveloping surface, (b)
Pressure 0.11MPa is to the ore deposit pressure 0.14MPa impact on zero-speed enveloping surface on the impact of zero-speed enveloping surface, (d)；
Fig. 3 is to affect schematic diagram to ore deposit pressure to cover lower short-circuit flow in the specific embodiment of the invention, and (a) is to press to ore deposit
The strong 0.05MPa impact of short-circuit flow lower on lid, (b) are for ore deposit to the ore deposit pressure 0.08MPa impact of short-circuit flow lower on lid, (c)
The pressure 0.11MPa impact of short-circuit flow lower on lid, (d) are to the impact of ore deposit pressure 0.14MPa short-circuit flow lower on lid；
Fig. 4 is turbulence intensity to ore deposit pressure to be affected schematic diagram in the specific embodiment of the invention, and (a) is to ore deposit pressure
0.05MPa on the impact of turbulence intensity, (b) be to ore deposit pressure 0.08MPa on the impact of turbulence intensity, (c) for ore deposit pressure
0.11MPa is to the ore deposit pressure 0.14MPa impact on turbulence intensity on the impact of turbulence intensity, (d)；
Fig. 5 is different to actual classification gained granularity distribution curve figure under the pressure of ore deposit in the specific embodiment of the invention；
Fig. 6 is the method flow diagram determining hydrocyclone in the specific embodiment of the invention to ore deposit pressure.
Detailed description of the invention
The detailed description of the invention of the present invention is described below by Φ 50mm hydroclone classification poor iron ore:
A kind of determine the hydrocyclone method to ore deposit pressure, as shown in Figure 6, comprise the steps:
Step 1, determine the structural parameters of hydrocyclone under target operating condition, the density of material to be fractionated, granularmetric composition and
On-the-spot feedstock concentrations；
The structural parameters of described hydrocyclone include: mineral-feeding pipe diameter, shell of column diameter, shell of column height, cone angle, spigot
Diameter, overflow diameter, overflow pipe insertion depth, overflow pipe wall thickness；
The density of described material to be fractionated refers to the true density of material to be fractionated；
The granularmetric composition of described material to be fractionated refers to the percetage by weight of each rank grade in material to be fractionated；
The structural parameters of hydrocyclone are as shown in table 1.
Table 1 Φ 50mm hydrocyclone structural parameters list
Determine that poor iron ore granularmetric composition to be fractionated is as shown in table 2.
Table 2 poor iron ore to be fractionated granularmetric composition
Determine that on-the-spot feed weight concentration is 30%；The density of material to be fractionated is 2763kg/m3；The density of water is
998.2kg/m3, dynamic viscosity is 1.003 × 10-3pa·s；The density of air is 1.225kg/m3, dynamic viscosity is 1.7894
×10-5Pa.s。
Step 2, structural parameters according to hydrocyclone described in step 1, use 3 d modeling software SolidWorks soft
Part set up hydrocyclone territory, flow field computation model and utilize ANSYS Meshing software by discrete for its grid, generated net
Lattice torsion resistance should be not higher than 0.8；
According to parameter described in table 1, utilize territory, the flow field computation model that SolidWorks software is set up in hydrocyclone also
Utilize ANSYS Meshing by discrete for its grid, generated mesh torsion degree highest order 0.6.
Step 3, grid step 2 generated import in cfdrc Fluent software, set territory, flow field
The boundary condition of computation model, and liquid phase viscosity is set, carry out numerical computations subsequently；
In cfdrc Fluent, inlet porting is pressure entrance, and difference is respectively to ore deposit pressure
0.05MPa, 0.08MPa, 0.11MPa and 0.14MPa；Arranging overfall and spigot is pressure outlet, pressure outlet is set to
Local standard atmospheric pressure, is i.e. 0 relative to pressure；
Liquid phase viscosity μ is setmFor:
Wherein, the viscosity, mu of waterw=1.7894 × 10-5Pa s, volume fraction v of-10 μm example granules-10μmSoft for Fluent
Part calculates automatically, coefficient n=0.62；
Step 4, numerical result obtained by step 3 extract and analyze different in hydrocyclone during the pressure of ore deposit
The lower short-circuit flow of the air column in flow field, portion, zero-speed enveloping surface, lid and turbulence intensity, determine optimum under hydrocyclone target operating condition
To ore deposit pressure；
Under described hydrocyclone target operating condition, to ore deposit pressure, optimum refers to that corresponding hydrocyclone interior flow field is special
Property meet simultaneously: Air core diameter and the settling mouth of hydrocyclone diameter ratio of cone section part are less than 1；Cone section part zero-speed bag
Network face does not surpasses without the vertical dimension ratio of the point on zero-speed enveloping surface at chamfering, and cone section 1/2 to hydrocyclone central axis
Cross 1.25；The lower short-circuit flow flow velocity of lid is not higher than 1m/s；Turbulence intensity peak is not higher than 1.
Different to the air column of hydrocyclone interior flow field corresponding to the pressure of ore deposit, zero-speed enveloping surface, the lower short-circuit flow of lid
And turbulence intensity is the most as shown in Figure 1 to 4.
In Fig. 1 (a) be to ore deposit pressure 0.05MPa on the impact of air column, (b) for ore deposit pressure 0.08MPa to air column
Impact, (c) be to be to the ore deposit pressure 0.14MPa impact on air column on the impact of air column, (d) to ore deposit pressure 0.11MPa；
It can be seen that when being 0.05MPa to ore deposit pressure, hydrocyclone flow field not yet enters steady statue, the sky of cone section part
Gas column diameter is significantly greater than settling mouth of hydrocyclone diameter, i.e. its ratio much larger than 1；When to ore deposit pressure higher than 0.08MPa,
The Air core diameter of cone section part and settling mouth of hydrocyclone diameter ratio are less than 1, and therefore 0.08MPa is target hydraulic cyclone
Device minimum to ore deposit pressure.
From Fig. 2 (a) be to ore deposit pressure 0.05MPa on the impact of zero-speed enveloping surface, (b) for ore deposit pressure 0.08MPa pair
The impact of zero-speed enveloping surface, (c) be to ore deposit pressure 0.11MPa on the impact of zero-speed enveloping surface, (d) for ore deposit pressure 0.14MPa
Impact on zero-speed enveloping surface；It can be seen that along with the increase to ore deposit pressure, the symmetry of zero-speed enveloping surface raises, and flow field is steady
Qualitative increase.When being 0.05MPa to ore deposit pressure, d at cone section 1/22With d1Ratio be 1.62, be unsatisfactory for requirement；Along with to ore deposit
Pressure increases further, hydrocyclone processed in units amount increase, but when fluid can not from outlet (overfall and spigot) and
Time discharge time, due to the collision between fluid and fluid and fluid and wall, the symmetry of zero-speed enveloping surface reduces again, i.e. such as Fig. 2
D shown in (), is there is chamfering upwards near the position of spigot in zero-speed enveloping surface, i.e. under this operating mode 0.14MPa to ore deposit pressure
Too high.
It is to be to lid to ore deposit pressure 0.08MPa to the ore deposit pressure 0.05MPa impact of short-circuit flow on lid, (b) from Fig. 3 (a)
The impact of lower short-circuit flow, (c) are for ore deposit pressure 0.14MPa pair to the ore deposit pressure 0.11MPa impact of short-circuit flow lower on lid, (d)
The impact of the lower short-circuit flow of lid, it can be seen that along with the increase to ore deposit pressure, radial velocity increases, thus the lower short circuit flow rate of lid increases
Add.When being 0.11MPa to ore deposit pressure, the lower short-circuit flow of lid has reached 1m/s.
The spatial distribution of turbulence intensity is most important along the ordered distribution of cyclone radial direction to granule.Fig. 4 (a) is to press to ore deposit
Strong 0.05MPa be to be to ore deposit pressure to ore deposit pressure 0.08MPa on impact, (c) of turbulence intensity on the impact of turbulence intensity, (b)
0.11MPa is to the ore deposit pressure 0.14MPa impact on turbulence intensity on the impact of turbulence intensity, (d), it can be seen that maximum rapid
Intensity of flow mainly appear on air column internal and near, when to ore deposit pressure little time, due to the instability in flow field, cause maximum rapid
Intensity of flow is higher.Along with the increase to ore deposit pressure, flow field is gradually stable, and during to ore deposit pressure 0.08MPa, maximum turbulence intensity value is
It is low, along with to the further increase of ore deposit pressure, the processed in units amount of hydrocyclone increases, and the highest turbulence intensity value also increases.
When being 0.08MPa and 0.11MPa to ore deposit pressure, flow field turbulence intensity peak all not higher than 1.
Therefore for the Φ 50mm hydrocyclone under investigated operating mode, for ensureing that hydrocyclone air column stablizes shape
One-tenth, the symmetry height of zero-speed enveloping surface, lid are lower, and short-circuit flow is not higher than 1m/s, turbulence intensity peak is not higher than 1, and the most optimal gives
Ore deposit pressure is 0.08MPa～0.11MPa.
Fig. 5 is different to the granularity distribution curve of actual classification gained under the pressure of ore deposit, and in figure, at apportionment ratio 50%, curve is oblique
Rate represents classification efficiency.It can be seen that giving ore deposit pressure is that 0.08MPa and 0.11MPa gained classification results is basically identical,
When being 0.14MPa to ore deposit pressure, classification results is slightly worse, and when being 0.05MPa to ore deposit pressure, classification results is substantially deteriorated.
Claims (1)
1. one kind determines the hydrocyclone method to ore deposit pressure, it is characterised in that comprise the steps:
Step 1, determine the structural parameters of hydrocyclone under target operating condition, the density of material to be fractionated, granularmetric composition and scene
Feedstock concentrations；
The structural parameters of described hydrocyclone include: mineral-feeding pipe diameter, shell of column diameter, shell of column height, cone angle, spigot are straight
Footpath, overflow diameter, overflow pipe insertion depth, overflow pipe wall thickness；
The density of described material to be fractionated refers to the true density of material to be fractionated；
The granularmetric composition of described material to be fractionated refers to the percetage by weight of each grade in material to be fractionated；
Step 2, structural parameters according to hydrocyclone described in step 1, use 3 d modeling software SolidWorks software to build
Territory, the flow field computation model of vertical hydrocyclone, and utilize ANSYS Meshing software by discrete for its grid, generated grid is turned round
Curvature should be not higher than 0.8；
Step 3, grid step 2 generated import in cfdrc Fluent software, set territory, flow field and calculate
The boundary condition of model, and liquid phase viscosity is set, carry out numerical computations subsequently；
Described boundary condition includes pressure entrance and the pressure outlet of hydrocyclone, and wherein pressure entrance is set to 0.05MPa
～the difference between 0.20MPa is set to local standard atmospheric pressure to ore deposit pressure, pressure outlet；
Described liquid phase viscosityWherein, μwFor the viscosity of water, v-10 μm is the volume fraction of-10 μm granules,
Coefficient n=0.5～0.7；
Step 4, numerical result obtained by step 3 extract and analyze different to hydrocyclone internal flow during the pressure of ore deposit
The lower short-circuit flow of the air column of field, zero-speed enveloping surface, lid and turbulence intensity, determine that under hydrocyclone target operating condition, optimum is to ore deposit
Pressure；
Under described hydrocyclone target operating condition, to ore deposit pressure, optimum refers to that corresponding hydrocyclone interior flow field characteristic is same
Time meet: Air core diameter and the settling mouth of hydrocyclone diameter ratio of cone section part are less than 1；Cone section part zero-speed enveloping surface
Vertical dimension ratio without the point on zero-speed enveloping surface at chamfering, and cone section 1/2 to hydrocyclone central axis is less than
1.25；The lower short-circuit flow flow velocity of lid is not higher than 1m/s；Turbulence intensity peak is not higher than 1.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111597725A (en) * | 2020-05-22 | 2020-08-28 | 重庆科技学院 | Oil-water separation efficiency evaluation method for oil-removing hydrocyclone |
| CN111686928A (en) * | 2020-06-12 | 2020-09-22 | 鞍钢集团矿业有限公司 | Automatic control system and method for feeding pressure of cyclone |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111597725A (en) * | 2020-05-22 | 2020-08-28 | 重庆科技学院 | Oil-water separation efficiency evaluation method for oil-removing hydrocyclone |
| CN111597725B (en) * | 2020-05-22 | 2023-05-09 | 重庆科技学院 | Oil-water separation efficiency evaluation method for oil-removing type hydrocyclone |
| CN111686928A (en) * | 2020-06-12 | 2020-09-22 | 鞍钢集团矿业有限公司 | Automatic control system and method for feeding pressure of cyclone |
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