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effect of spigot size on cyclone efficiency mine

The capacity of dense medium cyclones is often restricted by the solidscarrying capacity of the underflow referred to as spigot capacity Cyclone manufacturers normally recommend the spigot capacity for a cyclone of a particular size however it is not clear how these capacities are determined and whether they can be increased In the literature

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The effect of cyclone geometry and operating conditions
The effect of cyclone geometry and operating conditions

Furthermore the effect of overloading the spigot on the operation of a dense medium cyclone has not been adequately this study testwork on a 165 mm diameter dense medium cyclone was

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Computational study of the multiphase flow and
Computational study of the multiphase flow and

That explains why the separation efficiency in the cyclone with a bigger spigot is higher than that with a smaller one As the cylinder length increases the operational head decreases and the medium density differential and the medium split remain constant

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AMIT 145 Lesson 2 Classifying Cyclones – Mining Mill
AMIT 145 Lesson 2 Classifying Cyclones – Mining Mill

Cyclone Fundamentals A tangential feed injection is used to induce a centrifugal force which accelerates the particle size settling kinetics Coarse particles report to the outer wall of the cyclone and spiral downward toward the apex or spigot via the motion of the fluid stream Due to a constricted apex

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Hydrocyclone Efficiency Curves
Hydrocyclone Efficiency Curves

Hydrocyclone Efficiency Curves The Hydrocyclone Efficiency Curves are affected by many operating factors such as feed density apex and vortex sizes and feed pump pressure These factors will cause your cyclone classification to operate correctly in roping or spraying mode Everyone knows or has seen an “Ideal Cyclone Efficiency Curve” VS an actual

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Minerals  Weir Group
Minerals Weir Group

In addition to the increased wear life of the Cavex hydrocyclones the mine was able to achieve a major reduction of the 300 micron particles from the overflow Once the cluster was modified so all cyclones were Cavex hydrocyclones in addition to some plant modifications the mine increased gold recovery Cavex hydrocyclones in mining

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Influence of feed solids concentration on the performance
Influence of feed solids concentration on the performance

The flow ratio thus becomes an additional parameter in determining the cyclone efficiency A theoretical model which takes these effects into account has been developed and successfully tested against experimental data

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minerals c a  SciELO
minerals c a SciELO

Cyclone efficiency The usual and commonest method of representing cyclone efficiency is by the tromp partition or performance curve which relates the weight fraction or percentage of each particle size in the feed which reports to the apex underflow to the particle size In the cyclone operation the

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Particle Size Effects on HydroCyclone Performance
Particle Size Effects on HydroCyclone Performance

Finally the effect of particle size on hydrocyclone performance has been studied It was found that the grade efficiency and number of particle that exit from underflow of the hydrocyclone is increased when bigger particles is used A series of experiments has been carried out in a laboratory with a hydrocyclone

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University of Cape Town
University of Cape Town

This study focussed on the effect of the hydrocyclone spigot to vortex finder diameter ratio termed as the cone ratio solids concentration and viscosity on the classification of two dual density ores

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Multotec knowhow helps counter process factors in
Multotec knowhow helps counter process factors in

Multotec knowhow helps counter process factors in hydrocyclone performance which can impact the separation efficiency if the cyclone selection was originally not designed for that type of material while an increase in top size can increase the risk of blockages at the cyclone inlet “The effect of decreasing or increasing the top size

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How to counter common process factors affecting cyclone
How to counter common process factors affecting cyclone

Feb 20 2015 · A decrease in top size results in a finer mean particle size fed to the DMC which can impact the separation efficiency if the cyclone selection was originally not designed for that type of material while an increase in top size can increase the risk of blockages at the cyclone inlet “The effect of decreasing or increasing the top size

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Dewatering with Hydrocyclones  AggMan
Dewatering with Hydrocyclones AggMan

Apr 01 2014 · A third disadvantage of this method is a higher wear rate on the cyclone liners especially the spigotapex liner and the vortex finder Water siphon dewatering Through the addition of an extended overflow pipe siphon break control and a discharge regulator aka fishtail lipseal or flapper a hydrocyclone can be used to dewater solids and

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the spigot of hydrocyclone
the spigot of hydrocyclone

Fundamentals on the spigot capacity of dense medium cyclones recommend the spigot capacity for a cyclone of a particular size however it is not effect of overloading the spigot on the operation of a dense medium cyclone Contact US hydrocyclone efficiency 911 Metallurgist

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How to counter common process factors affecting cyclone
How to counter common process factors affecting cyclone

Feb 20 2015 · A decrease in top size results in a finer mean particle size fed to the DMC which can impact the separation efficiency if the cyclone selection was originally not designed for that type of material while an increase in top size can increase the risk of blockages at the cyclone inlet “The effect of decreasing or increasing the top size needs to be verified with the cyclone OEM” Bekker cautions

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Computational Study of the Multiphase Flow and
Computational Study of the Multiphase Flow and

It is here used to study the effects of cyclone size and spigot diameter when feed solids concentration is up to 30 by volume which is well beyond the range reported before The flow features predicted are examined in terms of the flow field pressure drop and amount of water split to underflow separation efficiency and underflow discharge type

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Particle Size Effects on HydroCyclone Performance
Particle Size Effects on HydroCyclone Performance

Finally the effect of particle size on hydrocyclone performance has been studied It was found that the grade efficiency and number of particle that exit from underflow of the hydrocyclone is increased when bigger particles is used A series of experiments has been carried out in a laboratory with a hydrocyclone

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cyclones – Mining Mill Operator Training
cyclones – Mining Mill Operator Training

Cyclone Fundamentals A tangential feed injection is used to induce a centrifugal force which accelerates the particle size settling kinetics Coarse particles report to the outer wall of the cyclone and spiral downward toward the apex or spigot via the motion of the fluid stream

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Multotec knowhow helps counter process factors in
Multotec knowhow helps counter process factors in

A decrease in top size results in a finer mean particle size fed to the DMC which can impact the separation efficiency if the cyclone selection was originally not designed for that type of material while an increase in top size can increase the risk of blockages at the cyclone inlet “The effect of decreasing or increasing the top size needs to be verified with the cyclone OEM” Bekker cautions

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DENSE MEDIUM CYCLONE OPTIMIZATON Technical
DENSE MEDIUM CYCLONE OPTIMIZATON Technical

Spirals have found acceptance in cleaning fines in the size range minus 16 mesh plus 100 mesh but are limited in their application due to process efficiency and separation density control Conventional froth flotation also suffers from efficiency and product quality control more »

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CFD STUDY OF THE MULTIPHASE FLOW IN
CFD STUDY OF THE MULTIPHASE FLOW IN

higher with a smaller cone opening or spigot diameter A small spigot also leads to a rope discharge instead of spay discharge increased cut size and decreased water split Saengchan et al 2009 and should be restricted to a low feed solids concentration Rietema 1961 Wang et al

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Chapter 1 Introduction  UPSpace
Chapter 1 Introduction UPSpace

CHAPTER 1 Introduction 2 Dense medium cyclones are used extensively in the mineral processing industry to beneficiate various minerals including coal diamonds and iron ore amongst others According to Reeves 2002 “the cyclone has been installed in over onequarter of

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Performance of High Flow Rate Samplers for Respirable
Performance of High Flow Rate Samplers for Respirable

Jul 21 2010 · In order to test the dust loading effect on the sampling efficiency for the high flow rate cyclones sampling efficiency was determined using ammonium fluorescein monodisperse particles in calm air chamber A at the size of 4 and 5 μm before and after dust loading with AC fine test dust Duke Scientific in calm air chamber B

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An evaluation of cyclone performance to improve the
An evaluation of cyclone performance to improve the

The ratio of spigot to vortex finder size also plays an important role in the cut size of the cyclone The larger the spigot is relative to the vortex finder the lower the cut size and the less sharp the cut This is due to an increase in water reporting toderflowthe un which results in a reduction in the cyclone’s efficiency 313 Slurry

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Effect of Volume Fraction on the Performance and
Effect of Volume Fraction on the Performance and

hydrocyclone and detect the effect of volume fraction of the two l iquid phases on the cyclone separation efficiency 2 Numerical details 21 Grid Generation and Meshing In the present work numerical solution will be used for presenting the effect of variable volume fractions on the static pressure axial radial tangential velocities and

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Hydro Cyclone  MEP
Hydro Cyclone MEP

General Principles of a Hydro cyclone The amount is dependent on such variables as the delivery head pressure and the diameter of the cyclone unit This force impels solids outwards towards the shell of the cylinder and once the conical section is reached downwards toward the apex discharge

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Hydrocyclone  Multotec
Hydrocyclone Multotec

measuring the spigot diameter since the cyclone efficiency can become affected as the spigot diameter increases looking at the vortex finder leading edge which means looking from the spigot side into the vortex finder to determine if the condition is still good

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