Magnetic and Electrical Separation

7/23/2019 Magnetic and Electrical Separation

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MAGNETIC ANDELECTRICAL

SEPARATION



Magnetic Separation

CONCEPT: ability to magnetize a particlar mineral an!p"y#ically collect it

Separation o$ mineral# #e# t"e !i%erence o$ mineral#&magnetic propertie#oSeparation o$ 'alable mineral# to non(magnetic gange miner

oSeparation o$ magnetic contaminant# or ot"er 'alable minera

non(magnetic 'ale#+



MINERAL C,ARACTERISTICS

-"en #b.ecte! to a magnetic /el!) all particle# re#pon!particlar manner an! can be cla##i/e! a# one o$ t"e t"rgrop#:

FERROMAGNETIC: "ig" magnetic ##ceptibility an! are #t

in!ce! by a magnetic /el!

PARAMAGNETIC: lo0 magnetic ##ceptibility an! a 0ea1 r

magnetic /el!DIAMAGNETIC: negati'e magnetic ##ceptibility* non(magn



2ERROMAGNETIC MINERALS

magnetite pyrr"otite



PARAMAGNETIC MINERALS

,ematite C"alcopyrite



DIAMAGNETIC MINERALS

3artz Calcite



4NIT O2 MEAS4REMENTS

Magnetic In!ction) 5Nmber o$ line# o$ $orce pa##ing t"rog" a nit area o$ m

4nit: TESLA (T) or GAUSS(G) : 1 T=10000G

2iel! Inten#ity) ,

Magnetizing $orce 0"ic" in!ce# t"e line# o$ $orce# t"rogmaterial

4nit: Ampere/meter (1Am -1 =4π x 10-7T)

Inten#ity o$ Magnetization) I

Relate# to t"e magnetization in!ce! in a material) M

4nit: M A/m



4NIT O2 MEAS4REMENTS

Magnetic S#ceptibility) Smea#re o$ "o0 ea#ily a #b#tance i# magnetize! in magnetic /el!

S=M/H

B= μ0 (H+ M ); M=SH

B= μ0 H(1+ S )



SEPARATOR C,ARACTERISTIC

In t"e !e#ign o$ a magnetic #eparator) t"e magnetic feintensity an! magnetic feld gradient are t"e t0o /r'ariable# t"at a%ect #eparation re#pon#e+

Ma6imm magnetic $orce re#lt# only 0"en bot" t"e ma/el! inten#ity an! magnetic /el! gra!ient are ma6imize!




No /el! gra!ient

Magnetic particleentering t"i# /el! 0illbe attracte! to t"eline# o$ 76 bt 0illremain #tationary

Di#play# a gra!ient

2iel! inten#to0ar!# t"e0it" #malle

Magnetic pentering t"con/grationly be attline# o$ 76migrate to region o$ 7

2IRSTMET,OD:



SECOND MET,OD




SEPARATOR C,ARACTERISTICPro'i#ion m#t be incorporate! in t"e #eparator $or reglating t"e intet"e magnetic /el! #o a# to !eal 0it" 'ario# type# o$ material

Electromagnet# #eparator#: 'arying o$ crrent

Permanent magnet# #eparator#: 'arying interpole !i#tance

Clo#e control o$ t"e #pee! o$ pa##age o$ t"e particle# t"rog" t"e /ele##ential+ 5elt# or !rm# are 'ery o$ten #e! to tran#port t"e $ee! t"

/el!+Pro'i#ion $or collection o$ t"e magnetic an! non(magnetic $raction# mincorporate! into t"e !e#ign o$ t"e #eparator+

Con'eying !e'ice 0"ic" carrie# magnetic# ot o$ t"e in7ence o$ into a bin

Non(magnetic#: $ree($all $rom t"e con'eyor into t"e bin



T8PES O2 MAGNETICSEPARATOR



LO- INTENSIT8 MAGNETICSEPARATION

Drm Separator# Treat ore# 0"ic" contain 9(;< 2e) mainly a# magn

Dry Drm(Type Magnetic Separator

-et Drm(Type Magnetic Separator



DR8 DR4M(T8PE MAGNETICSEPARATOREmploye! $or t"e collection o$ $erromagnetic mineral# =particle #izecm?

Permanent or electromagnet#) +@ T =@ G?

Drm #pee!: +;(+; mB#



-ET DR4M(T8PE MAGNETICSEPARATORMagnetic /el! can eit"er be generate!by permanent or electromagnet*+@ T=@ G?

4#e! $or concentrating /ner$erromagnetic particle#* a!!ition o$

0ater

,y!ro!ynamic !rag $orce• Pro: 0a#"ing a0ay o$ non(magnetic

particle# 0"ile $erromagnetic# arecollecte!

• Con: al#o re#pon#ible $or any lo##e# o$$erromagnetic#



-ET DR4M(T8PE MAGNETICSEPARATORCOUNTER-ROTATION TYPE

2ee! 7o0# in t"e oppo#ite!irection to t"e rotation o$ t"e!rm

occa#ional #rge# in $ee! m#t be"an!le!

magnetic material lo##e# are to be"el! to a minimm

0"ile an e6tremely clean concentratei# not reire!

0"en "ig" #oli!# loa!ing i#encontere!



-ET DR4M(T8PE MAGNETICSEPARATOR

COUNTER-CURRENTTYPEtailing# are $orce! to tra'el int"e oppo#ite !irection to t"e!rm rotation an! are!i#c"arge! into t"e tailing#c"te

!e#igne! $or /ni#"ingoperation# on relati'ely /nematerial) o$ particle #ize le##t"an abot @; μm



,IG, INTENSIT8 MAGNETICSEPARATION

Rare Eart" Drm Magnetic SeparatorRare Eart" Roll Magnetic Separator

In!ce! Roll Magnetic Separator

-et ,ig" Inten#ity Magnetic Separator =-,IMS?

,ig" Gra!ient Magnetic Separator =,GMS?



RARE EART, DR4M SEPARAT

4#e# rare eart" permanent magnet# 0"ic" pro'i!e "ig"energy pro!ct

4#e# a #alient pole magnetic element !e#ignFCon#i#t# o$ a #erie# o$ a6ial pole# con/gre! 0it" alternating pol

FSteel 0e!ge# or interpole# are place! bet0een eac" magnetic po

concentrate# t"e magnetic 76 pro!cing a "ig" magnetic gra!ie!rm #r$ace?

FMagnetic /el! #trengt": ga## =T?

FCan be #e! to bot" 0et an! !ry $ee!#



RARE EART, DR4M SEPARAT



RARE EART, DR4M SEPARATCIRC4IT



RARE EART, DR4M SEPARATCIRC4IT

MINERA PROCE!! APPICATION

Ilmenite Reco'ery o$ Ilmenite $rom "ea'y minerconcentrate#

Ilmenite Separation o$ "ig"(iron Ilmenite $romiron Ilmenite

,ematite Concentration an! reco'ery o$ "ematit

Sl/!e# Reco'ery o$ pyrr"otite

Speclar,ematite

Concentration o$ #peclar "ematite $rogra'ity concentration

Nic1el Slag Reco'ery o$ re#i!al metallic nic1el

Silica San! Remo'ing $erromagnetic an! paramag

con#titent#



RARE EART, ROLL MAGNETICSEPARATOR!ry proce## #tream

Generating pea1 magnetic/el! #trengt" o$ @ga##

4#e! $or concentrating orremo'ing 0ea1ly magneticmineral#

Typically #e! 0"en "ig"(prity pro!ct i# reire!



IND4CED ROLL MAGNETICSEPARATORGenerate# magnetic /el! 0it" an electromagnet

#e! to treat beac" #an!#) 0ol$ramite) tin ore#) gla## #ap"o#p"ate roc1

being !i#place! by t"e ne0 rare eart" !rm an! roll #ep



-ET ,IG,(INTENSIT8 MAGNESEPARATOR =-,IMS?4#e! in 'ery /ne particle concentration

greate#t #e in t"e concentration o$ lo0(gra!e iron ore#containing "ematite



,IG, GRADIENT MAGNETIC



,IG, GRADIENT MAGNETICSEPARATOR

Magnetic and Electrical Separation

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