CN109164017A - A kind of gas-liquid-solid three-phase foam forces drain experimental rig and test method - Google Patents
A kind of gas-liquid-solid three-phase foam forces drain experimental rig and test method Download PDFInfo
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- CN109164017A CN109164017A CN201811194229.8A CN201811194229A CN109164017A CN 109164017 A CN109164017 A CN 109164017A CN 201811194229 A CN201811194229 A CN 201811194229A CN 109164017 A CN109164017 A CN 109164017A
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- drain
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- foam
- thysanophyllum
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
Abstract
Drain experimental rig and experimental method are forced the invention discloses a kind of gas-liquid-solid three-phase foam, and in constant pressure tank liquid feeding system, water tank is placed on magnetic stirring apparatus, and tank top is equipped with liquid supplementation pipe, and water tank middle and lower part sets pressure drain pipe.The Thysanophyllum top cylinder of Thysanophyllum drainage system and lower part cylinder flanged joint, after the rubber plug back cover of lower part cylinder bottom and fixed in cylinder base, filled capillary protrudes into lower part cylinder by rubber plug.In test, surfactant solution generates stable foam after inflating in Thysanophyllum, and addition forces liquid and carries out forcing drain test after foam drains.Apparatus of the present invention and method, mineral grain are fed after water tank mixing, convenient for properties such as control granule density, granularity, hydrophobicitys.Constant pressure tank can be stablized instead of common buret and force flow rate of liquid.Using segmented foam columns, it is easy to disassemble and take out different piece foam and not with drain be discharged particle, convenient for the analysis to three-phase froth drain.
Description
Technical field
The present invention relates to a kind of gas-liquid-solid three-phase foams to force drain experimental rig and test method.
Background technique
In mineral floating, drain degree and the spoil entrainment of foam are closely related, foam property and final concentrate product
Position has certain correlativity, therefore, has scholar to predict concentrate grade by foam property, realizes accurate on-line prediction,
Production efficiency can be improved, and be of great significance to floatation process automation control.And currently, to complicated three-phase flotation froth
Still in its infancy, foams drain is a significant process for influencing final concentrate grade, to the bubble containing solid particle for research
Foam drain theoretical research is less, recognizes also very insufficient.Traditional pressure drain test drips surfactant solution from top
Determine pipe to be added in dry foam, power relationship is fitted by observation wetting front end drain age velocity and buret flow, analyzes two-phase
Drain mechanism (bibliography such as D.Weaire, N.Pittet, S.Hutzler the and D.Pardal, Physical of foam
review letters,1993,71,2670、S.A.Koehler,S.Hilgenfeldt and H.A.Stone,Physical
review letters,1999,82,4232、S.Stoyanov,C.Dushkin,D.Langevin,D.Weaire and
G.Verbist, Langmuir, 1998,14,4663-4665 etc.).But traditional pressure drain test method is limited to three-phase
The research of foam, foam generate from bottom, force liquid and feed from top, be such as mixed into the surfactant solution of blistering
If grain, it is mixed into the properties such as the concentration, granularity and hydrophobicity of particle and is difficult to control, particle will affect during generating foam
Bubble size distribution in foam, these factors can all cause the analysis to three-phase drain mechanism inaccurate, so that heterogeneity
Influence of the grain in foams drain can not be verified accurately, and this seriously inhibits the understanding to three-phase flotation froth drain.Therefore, non-
Often it is necessary to force drain experimental rig and method to improve tradition, to make up its office in three-phase drain experimental study
Sex-limited, this helps to propose mechanism of action of the mineral grain of different nature during foams drain, deepens to three-phase froth
Understanding.
Summary of the invention
The object of the present invention is to overcome defect of the existing technology, a kind of gas-liquid-solid three-phase foam pressure row is proposed
Liquid experimental rig, and the method for forcing drain test based on apparatus of the present invention.With being fed after constant pressure tank hybrid particles, just
In properties such as control granule density, granularity, hydrophobicitys, and stabilization forces flow rate of liquid, helps to analyze particle to foams drain
The influence of mechanism.Using segmented foam columns, it is easy to disassemble and take out different piece foam and not with drain be discharged particle,
It can reinforce the understanding to three-phase froth drain.
To achieve the above object, the technical solution adopted by the present invention are as follows:
A kind of gas-liquid-solid three-phase foam pressure drain experimental rig, including constant pressure tank liquid feeding system and Thysanophyllum drain system
System.
The constant pressure tank liquid feeding system includes magnetic stirring apparatus and water tank, and water tank is placed on magnetic stirring apparatus, the magnetic
The magnet rotor of power blender penetrates in water tank.Water tank upper sets water tank overflow weir, and tank top is equipped with liquid supplementation pipe, water tank middle and lower part
If forcing drain pipe, force drain pipe with pressure drain control valve.
The Thysanophyllum drainage system, including Thysanophyllum top cylinder, lower part cylinder, cylinder base and filled capillary,
Thysanophyllum top cylinder is connected with lower part cylinder, after the rubber plug back cover of lower part cylinder bottom and fixed in cylinder base,
Filled capillary protrudes into lower part cylinder by rubber plug.
The constant pressure tank liquid feeding system is placed in above Thysanophyllum drainage system, and the nozzle for forcing drain pipe, which connects, to be steeped
Foam column top cylinder top.
Apparatus of the present invention application method:
Opening liquid supplementation pipe is that water tank adds the suspension containing appropriate test mineral grain and surfactant, is stirred by magnetic force
It mixes device and magnet rotor to be stirred the suspension in water tank, mineral grain is made to be in homogeneously dispersed state, suspended by adding
Liquid keeps high water tank balance (keeping level pressure).Proper amount of surfactant solution is added in the cylinder of Thysanophyllum lower part, passes through insertion
The filled capillary of pedestal surfactant solution into Thysanophyllum is inflated, and stable foam is generated, when foam is full of entire cylinder
Stop inflation afterwards, stands after top is sealed with experimental film paper to drain in foam.Then opening forces drain pipe to carry out
Drain is forced, suspension instills Thysanophyllum, carries out forcing drain test.
Further, the Thysanophyllum top cylinder and lower part cylinder, are connected by flange, easy to disassemble.
Further, Thysanophyllum top cylinder and lower part cylinder are cylindrical shape, by transparent glass or organic
Glass is made.
A method of gas-liquid-solid three-phase foam is carried out using above-mentioned experimental rig, drain is forced to be tested, including walk as follows
It is rapid:
It is that water tank adds the suspension containing appropriate test mineral grain and surfactant that step 1., which opens liquid supplementation pipe, until water
Case is full of, and is stirred with magnetic stirring apparatus and magnet rotor to the suspension in water tank, and particle is made to be in homogeneously dispersed state.It beats
It opens liquid supplementation pipe and persistently adds suspension holding high water tank balance.Pressure drain pipe is opened simultaneously, setting forces drain pipe to be forced
Suspension is accessed graduated cylinder by the uninterrupted of drain, is measured the volume V of graduated cylinder access suspension in period T, can must be hanged
Supernatant liquid flow Q.
Coal particles and surfactant qualities concentration ratio are 5 in the coal particles and surfactant mixing suspension
~30g/L, coal particles particle size range characterize the range at coal particles hydrophobic contact angle at 10~120 ° in 0~0.25mm,
More than a critical micelle concentration, the type of surfactant generally requires steady for that can be formed the concentration of the surfactant
The ionic surfactant for determining foam, such as lauryl sodium sulfate (SDS), cetab (CTAB), 14
Alkyl trimethyl ammonium bromide (TTAB) etc..
Surfactant solution is added (with surfactant Application Range phase in step 1 in the bottom of step 2. Thysanophyllum
Together), additional amount is about a quarter~one third of lower part height of column, and by filled capillary, into Thysanophyllum, surface is living
Property agent solution inflation, generate foam, stop inflation after foam is full of entire Thysanophyllum cylinder, with experimental film paper by foam capital
It stands after portion's sealing to drain in foam.
Step 3. carries out by force under the conditions of forcing drain pipe to force the uninterrupted of drain according to the method for step 1 in setting
Suspension is instilled Thysanophyllum by drain processed, during this period, opens light source and video recording equipment, record starts foam after pressure drain
The process for forcing suspending liquid is added in foam in column, and dry foam is wetted from top, observes a mobile wetting front end
Top wet foam and lower part dry foam are separated, speed is moved down by processing image acquisition wetting front end, uses VfIt indicates.
Step 4. sets the different uninterrupteds for forcing drain pipe to force drain, repeats step 1 and arrives step 3, obtains more
The corresponding suspension flow Q of group moves down speed V with wetting front endf, suspension flow Q is obtained with least square method fitting data
Speed V is moved down with wetting front endfBetween power relationship, be shown below:
Wherein A is Thysanophyllum cross-sectional area, and α is power exponent, jdFor the superficial liquid velocity for forcing liquid.Wherein power exponent α can
Characterize drain mechanism, when assuming that in foam gas-liquid interface be it is fixed and non-moving, in the channel in be Poiseuille flow, α=1/2, table
The leading drain mechanism in the boundary Pu Langtu is shown, has been piston flow, α in the channel in when assuming that gas-liquid interface is moveable in foam
=1/3, illustrate the leading drain mechanism in vertex.
Further, step 5. uses sheet plastic after every group of drain in addition to analyzing the power relationship of drain test
Upper section cylinder foam is intercepted at Thysanophyllum spacer flanger position, filtering drying after foam is taken out remains in bubble for analyzing
Particle characteristics in foam further analyze three-phase froth drain rule.
The gas that filled capillary surfactant solution into Thysanophyllum is filled with is stabilizing gas, such as nitrogen.
The surfactant solution is usually the ionic medicament of high concentration, such as sodium dodecyl sulfate solution, concentration
Greater than one critical micelle concentration.
The utility model has the advantages that experimental rig of the present invention and three-phase froth drain test method, replace tradition drop by constant pressure tank
Fixed pipe, the suspension for using surfactant and mineral grain to mix add after magnetic stirrer is uniform as liquid is forced
Enter Thysanophyllum, then analyzes three-phase froth by forcing fluid flow and soaking the power relationship power exponent that front end velocity fitting obtains
Drain mechanism after drain, can take out top foam from segmented cylinder flange, analyze residual particles property.This system
Having the advantages that constant pressure tank makes to force that fluid flow is accurate, stablizes, and is not influenced by buret difference in height；Magnetic agitation
Device mixes particle and feeds suspension from top convenient for particle properties in control suspension, such as granule density, granularity, hydrophobicity；
Segmented Thysanophyllum is convenient for taking out top foam and analyzes the behavior of particle in discharge opeing process；System is simple, detachably, failure rate
It is low；Influence of the particle to drain mechanism can be analyzed, particle is probed into and is forcing the mechanism of action in discharge opeing process, filled up current
The blank of foams drain research field.
Detailed description of the invention
Fig. 1 is to force drain experimental rig in the prior art.
Fig. 2 is the structural schematic diagram that gas-liquid-solid three-phase foam of the present invention forces drain experimental rig.
Specific embodiment
The present invention will be further explained with reference to the accompanying drawing.
As shown in Fig. 2, gas-liquid-solid three-phase foam of the present invention forces drain experimental rig comprising constant pressure tank liquid feeding system
With Thysanophyllum drainage system, in which:
Constant pressure tank liquid feeding system forces fluid flow and controls addition particle properties, including magnetic stirring apparatus for stabilization
1, magnet rotor 2, water tank 3, water tank 3 are placed on magnetic stirring apparatus 1, and magnet rotor 2 is placed in water tank 3.Water tank is suitable for reading to be surrounded by
Water tank overflow weir 5,5 bottom of water tank overflow weir are equipped with drain pipe, and the first valve 4 is arranged on drain pipe, is equipped with fluid infusion at the top of water tank 3
The second valve 6 is arranged in pipe, liquid supplementation pipe, adds suspension for control to keep liquid level.3 middle and lower part of water tank, which is equipped with, forces drain
Pipe, forces that third valve 8 is arranged on drain pipe pipeline, forces drain to force fluid flow for controlling.Force drain pipe nozzle
It is placed in the top of Thysanophyllum.
Thysanophyllum drainage system forces the process of drain for realizing foam, probes into the change and foam residual of drain mechanism
The property of particle, Thysanophyllum are made of top cylinder 10 and lower part cylinder 12, and Thysanophyllum top cylinder 10 and lower part cylinder 12 are logical
It crosses flange to be connected, detachably, the lower part rubber plug back cover of lower part cylinder 12 is directly placed into the similar seat of diameter of pedestal 13
It is fixed in hole, is detachably connected between lower part cylinder 12 and pedestal 13, convenient for cleaning.Filled capillary 15 passes through rubber plug
Lower part cylinder is protruded into, is filled in entire cylinder for inflation, the foam of generation in Surfactant solution 14, the gas being filled with
Body is stabilizing gas such as nitrogen, and surfactant solution is usually the ionic medicament of high concentration, as lauryl sodium sulfate is molten
Liquid, concentration are greater than a critical micelle concentration.
Thysanophyllum top cylinder 10 and lower part cylinder 12 are cylindrical shape, are made of transparent glass, Thysanophyllum pedestal
13 are made of transparent organic glass.
In coal flotation, drain experimental rig is forced to carry out gas-liquid-solid three-phase bubble using gas-liquid-solid three-phase foam of the present invention
Foam forces the detailed process of drain test:
It is that water tank adds the suspension containing appropriate test mineral grain and surfactant that step 1., which opens liquid supplementation pipe, until water
Case is full of.In coal particles and surfactant mixing suspension coal particles and surfactant qualities concentration ratio be 5~
30g/L, coal particles particle size range characterize the range at coal particles hydrophobic contact angle about at 10~120 ° in 0~0.25mm,
Surfactant is the sodium dodecyl sulfate solution of a critical micelle concentration.With magnetic stirring apparatus 1 and magnet rotor 2 to water tank
Suspension 7 in 3 is stirred, and particle is made to be in homogeneously dispersed state.It first opens the second valve 6 and persistently adds suspension holding
High water tank balance.Third valve 8 is opened again, and a certain opening and closing degree of fixed third valve 8 keeps the pressure drain pipe of setting
Suspension 7 is accessed graduated cylinder by the uninterrupted for forcing drain, measures the volume V that graduated cylinder is accessed to suspension in period T,
Suspension flow Q can be obtained.
Sodium dodecyl sulfate solution (the table that concentration is greater than a critical micelle concentration is added in the bottom of step 2. Thysanophyllum
Face activator solution) 14, additional amount is a quarter~one third of lower part height of column, by filled capillary 15 to bubble
Surfactant solution 14 is inflated in foam column, generates foam, stops inflation after foam is full of entire Thysanophyllum cylinder, at top
Drain in foam is waited for about 25min is stood after the sealing of experimental film paper, is ready for forcing discharge opeing process.
Step 3. (pressure drain pipe of setting under the conditions of fixed third 8 opening and closing degree of valve according to the method for step 1
Force the uninterrupted of drain) pressure drain is carried out, suspension 7 is instilled into Thysanophyllum, during this period, opens 16 He of LED light source
Camera 17 records foam after opening third valve 8 with 17 recording function of camera and is added the process of liquid forced, and dry foam is from top
It is wetted, it can observe that a mobile wetting front end separates top wet foam 9 and lower part dry foam 11, be schemed by processing
Speed as obtaining wetting front end, uses VfIt indicates.
Step 4. sets different 8 opening and closing degrees of third valve, repeats step 1 and arrives step 3, obtain the corresponding Q of multiple groups and
Vf, Q and V are obtained with least square method fitting datafBetween power relationship, be shown below:
Wherein A is Thysanophyllum cross-sectional area, and α is power exponent, jdFor the superficial liquid velocity for forcing liquid.Wherein power exponent α can
Characterize drain mechanism, when assuming that in foam gas-liquid interface be it is fixed and non-moving, in the channel in be Poiseuille flow, α=1/2, table
The leading drain mechanism in the boundary Pu Langtu is shown, has been piston flow, α in the channel in when assuming that gas-liquid interface is moveable in foam
=1/3, illustrate the leading drain mechanism in vertex.
The power relationship that step 5. is tested in addition to analysis drain, after every group of drain, with sheet plastic in Thysanophyllum
Upper section cylinder foam is intercepted at spacer flanger position, the particle of filtering drying analysis residual in the foam is special after foam is taken out
Property, further three-phase froth drain rule is analyzed.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (8)
1. a kind of gas-liquid-solid three-phase foam forces drain experimental rig, including constant pressure tank liquid feeding system and Thysanophyllum drain system
System；It is characterized in that:
The constant pressure tank liquid feeding system includes magnetic stirring apparatus and water tank, and water tank is placed on magnetic stirring apparatus, and the magnetic force stirs
The magnet rotor for mixing device penetrates in water tank；Water tank upper sets water tank overflow weir, and tank top is equipped with liquid supplementation pipe, and water tank middle and lower part is set by force
Drain pipe processed；
The Thysanophyllum drainage system, including Thysanophyllum top cylinder, lower part cylinder, cylinder base and filled capillary, foam
Column top cylinder is connected with lower part cylinder, after the rubber plug back cover of lower part cylinder bottom and fixed in cylinder base, inflation
Capillary protrudes into lower part cylinder by rubber plug；
The constant pressure tank liquid feeding system is placed in above Thysanophyllum drainage system, and the nozzle for forcing drain pipe connects in Thysanophyllum
Top cylinder top.
2. gas-liquid-solid three-phase foam according to claim 1 forces drain experimental rig, it is characterized in that: the Thysanophyllum
Top cylinder is connected with lower part cylinder by flange.
3. gas-liquid-solid three-phase foam according to claim 1 forces drain experimental rig, it is characterized in that: on the Thysanophyllum
Portion's cylinder and lower part cylinder are cylindrical shape, are made of transparent glass or organic glass.
4. a kind of force drain experimental rig to carry out gas-liquid-solid three using gas-liquid-solid three-phase foam described in claim 1,2 or 3
The method that phase foam forces drain test, includes the following steps:
It is that water tank adds the suspension containing appropriate test mineral grain and surfactant that step 1., which opens liquid supplementation pipe, until water tank fills
It is full, the suspension in water tank is stirred with magnetic stirring apparatus and magnet rotor, particle is made to be in homogeneously dispersed state；It opens and mends
Liquid pipe persistently adds suspension and keeps high water tank balance；Pressure drain pipe is opened simultaneously, setting forces drain pipe to force drain
Uninterrupted, suspension is accessed into graduated cylinder, measures the volume V of graduated cylinder access suspension in period T, suspension can be obtained
Flow Q；
Surfactant solution is added in the bottom of step 2. Thysanophyllum, and additional amount is a quarter~tri- point of lower part height of column
One of, by filled capillary, into Thysanophyllum, surfactant solution is inflated, and foam is generated, when foam is full of entire Thysanophyllum
Stop inflation after cylinder, will be stood after sealing at the top of Thysanophyllum to drain in foam with experimental film paper；
Step 3. carries out pressure row under the conditions of the pressure drain pipe of setting forces the uninterrupted of drain according to the method for step 1
Suspension is instilled Thysanophyllum by liquid, during this period, opens light source and video recording equipment, is recorded after starting to force drain in Thysanophyllum
The process of suspending liquid forced is added in foam, and dry foam is wetted from top, and a mobile wetting front end is by the wet bubble in top
Foam and lower part dry foam separate, and move down speed by processing image acquisition wetting front end, use VfIt indicates；
Step 4. sets the different uninterrupteds for forcing drain pipe to force drain, repeats step 1 and arrives step 3, obtains multiple groups pair
The suspension flow Q answered moves down speed V with wetting front endf, suspension flow Q and profit are obtained with least square method fitting data
Wet front end moves down speed VfBetween power relationship, be shown below:
Wherein A is Thysanophyllum cross-sectional area, and α is power exponent, jdFor the superficial liquid velocity for forcing liquid.
5. according to claim 4 force drain test dress using gas-liquid-solid three-phase foam described in claim 1,2 or 3
The method that gas-liquid-solid three-phase foam forces drain test that carries out is set, it is characterized in that:
Step 5. intercepts upper section cylinder foam at Thysanophyllum spacer flanger position, foam is taken out after every group of drain
Filtering drying afterwards, for analyzing the particle characteristics of residual in the foam.
6. according to claim 4 force drain test dress using gas-liquid-solid three-phase foam described in claim 1,2 or 3
The method that gas-liquid-solid three-phase foam forces drain test that carries out is set, it is characterized in that: the coal particles and surfactant mixing
Suspension, coal particles and surfactant qualities concentration ratio are 5~30g/L, coal particles particle size range in 0~0.25mm,
The range at coal particles hydrophobic contact angle is characterized at 10~120 °.
7. forcing drain using gas-liquid-solid three-phase foam described in claim 1,2 or 3 according to claim 4,5 or 6
Experimental rig carries out the method that gas-liquid-solid three-phase foam forces drain test, it is characterized in that: the concentration of the surfactant exists
More than one critical micelle concentration, the type of surfactant is the ionic surfactant that can form stable foam.
8. according to claim 7 force drain test dress using gas-liquid-solid three-phase foam described in claim 1,2 or 3
The method that gas-liquid-solid three-phase foam forces drain test that carries out is set, it is characterized in that: the surfactant selects dodecyl sulphur
Sour sodium, cetab or tetradecyltrimethylammonium bromide.
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| CN110243726A (en) * | 2019-05-31 | 2019-09-17 | 山东科技大学 | A kind of coal containing methane gas wetting of particulates characteristic test device and test method |
| CN111122112A (en) * | 2019-12-30 | 2020-05-08 | 河北工业大学 | Solid particle distribution method and device for researching liquid-solid two-phase flow in water tunnel |
| CN113960036A (en) * | 2021-10-21 | 2022-01-21 | 中国矿业大学 | Hele-Shaw box-based three-phase foam decay observation system and method |
| CN114894438A (en) * | 2022-06-08 | 2022-08-12 | 上海交通大学 | Experimental device for simulating particle suspension plume discharge |
| CN113960036B (en) * | 2021-10-21 | 2024-04-19 | 中国矿业大学 | Three-phase foam decay observation system and method based on Hele-Shaw box |
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| CN113960036A (en) * | 2021-10-21 | 2022-01-21 | 中国矿业大学 | Hele-Shaw box-based three-phase foam decay observation system and method |
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| CN109164017B (en) | 2020-10-23 |
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