General steps Flashcards
1
Q
levigation
A
Wilfley table
2
Q
difference in weight
A
gravity separation
3
Q
difference in magnetic properties
A
magnetic seperation
4
Q
froth floatation
A
mainly for sulphide ores (S2-)
5
Q
frothers
A
pine oil, eucalyptus oil
6
Q
froth stabilizers
A
cresol and aniline
7
Q
water wet
A
gangue
8
Q
froth wet
A
ore
9
Q
collectors
A
sodium xanthates
helps in attachment of ore to air bubbles
10
Q
activators
A
enhance floating properties
CuSO4
11
Q
depressant
A
PbS and ZnS : CN-
PbS is separated and then oxidising agents are used and ZnS is removed.
12
Q
finest ore of iron
A
magnetite
13
Q
leaching is used for
A
Al, Ag, Au
14
Q
leaching for Al2O3
A
NaOH > Na[Al(OH)2] or NaAlO2.2H2O > Al(OH)3 > dried(Al2O3)
15
Q
oxidation process
A
- calcination
2. reduction
