the principles of gravity concentration-revisi
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7/23/2019 The Principles of Gravity Concentration-Revisi
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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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