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The Principles Of Gravity

Concentration

3334141867[28]

Created By

Nadya Zulfani

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Outline

The Principle Of

!ra"ity #eparati$n

%eference

&ntr$ducti$n

C$nclui$n

The 'echani(

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)$* +ar ,$ -$u .n$*

 /0$ut !ra"ity

C$ncentrati$n

&ntr$ducti$n

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Factors which Affect The Relative

Movement (Separation)

Weight Shape

Size

Spesific Gravity 

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The Principles Of

Gravity Separation

  Settling Rate of Particles

 Concentration Criterion

Separation y gravity !epen!s on two

factors"

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Viscous ResistanceStoke’s Law

 Turbulent ResistanceNewton’s Law

Settling Rate ofParticles

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Viscous Resistance#t$e 5a*

 #l$* peed there i n$

tur0ulance %eyn$ld

Nu(0er %e19:

, particle ; (icr$(eter   +$r <uart= #i=e 11; (

 

 TurbulentResistance

Ne*t$n 5a* +at peed %eyn$ld

Nu(0er %e>1;;;9:

, particle > ((  +$r <uart= #i=e >3: ((

%e? Predict ,ifferent +luid +l$* #ituati$n:

%e ? ?

Where v = Kinematic Viscosity(/s)

 

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+@? +@,$*n*ard f$rce $f !ra"ity +d ? %etrainin@ +$rce Of ,ra@

At? The )i@het Ael$city /ttaina0le0y an O0ect a it fall thr$u@h air:

Ael$city? C$ntant /ccelerati$n?; Net +$rce?;

+d and Bu$yancy

+luid Ael$city9

? +@

The

Forces

TerminalVelocity

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Fg Vt

Fb Vt 

Fd Vt

 The separation in GravityConcentration eco!e "asieri# Vt

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CC

1;

 

Dhere ,h i #peific !ra"ity +$r )ea"y 'ineral:

  ,f i #peific !ra"ity +$r +luid Eually Dater $r /ir 9

  ,l i #peific !ra"ity +$r 5i@ht 'ineral:

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#pecific !ra"ity at a pecified te(perature

#! ? Fu0tance G F)2O

SG = Specific Gravity of the substance

 ρsubstance = density of the fluid or substance (k/m! ) "" ## ρ = m / V

 ρ$%&  = density of 'ater " normally at temperature o (k/m! )

*+++ k/m! 

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The hape ettlin@ fact$r i the rati$ $f theter(inal "el$city $f t*$ particle $f the a(e

(ineral a(e denity a(e i=e 0ut different

hape:

#hape #ettlin@ +act$r ?

Dhere AT ? ter(inal "el$city

 

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#&ZHC$ncentrati$n Criteri$n At #ettlin@ %ate Of Particle

#eparatin@ ,itance !ra"ity #eparati$n Bec$(e Haier 

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Weight (m) =

Spesic Gravity

SizeShape (Tentative)

Gravity Separationecome !asier

 

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Horizontal Fluid

Movement 

Sha#ing Tale

Sl$ice %o&

'$mphrey Spiral

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Gravity Separation %ase! on The Fl$i! Movement

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Vertical ,luid

-ovement I Ji@@in@

.uite ,luid

-ovement

I ,ene 'ediu(#eparati$n

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The "echanisms

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 /d"anta@e

1:Hn"ir$n(ent +riendly due t$ the /0ence $f

Or@anic Che(ical and their %eacti$n

Pr$duct

2: %elati"ely #i(ple and &neKpeni"e3: ,$e n$t ue HKpeni"e %ea@ent

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ConclusionsI The separation of !ifferent mineral species from one

another ase! on !ifferences in their specific gravities

I Factors which affect the Separation are eight Shape

Si*e an! Spesific Gravity+

I   Separation y gravity !epen!s on Settling Rate of

Particles and Concentration Criterion

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References

arry% & 'ills( )an Ti! Napierr*+unn( ,--.( MineralProcessing Technology ( &!erika/ "lsevier Science 0 Technology ooks( 1arar% aki( &nd 2( +( )oggan( 3456( Mineral Processing

Design.  Turkey / N&T7 Scienti8c &9airs )ivision(http#$$%%%&ge''os&com$form*ocments$+,-ntro*ctionToGravity&p*f 

 . accesse* on Sn*ay +/ 0ovem1er ,+/2 at //#+23"http#$$

mem1erles&free%e1s&com$45$65$6,676545$*ocments$yan8,+n8,+gpta8,+5&p*f . accesse* on Sn*ay +/ 0ovem1er ,+/2 at//#+63"http#$$isites&harvar*&e*$fs$*ocs$ic1&topic/+7,592&les$Fina

l8,+Pro:ects$Fli*s8,+;rag$sto'es8,+la1&p*f   accesse* on "on*a +, 0ovemer ,+/2 at /+#/2

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<estions

:3( 'hat are the !inerals which belong to;eavy +ineral and Light +ineral <

:,( 'hat is the reason o# the di9erences

in this Gravity Concentration ased onthe Fluid +ove!ent <

:=( Ree>plain the e?uation o#Concentration Criterion @

:A( Ree>plain the Curve betweenConcentration Criterion and SiBe @:.( 'hat is the relation between the

Forces that work here with GravitySeparation <

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