ores Flashcards
1
Q
hydraulic washing/ gravity separation / levigation is used for
A
sno2 fe2o3 fecr2o7
2
Q
wolframite
A
FeWo4 + MnWo4
3
Q
aluminium is ___ most abundant element with____percentage by weight
A
third, 8.3%
4
Q
aluminium’s ore
A
bauxite
5
Q
frothing agent
A
eucalyptus oil, crude coal tar, cresols
reduces surface tension and helps the formation of stable froth
6
Q
collecting agent
A
sodium ethyl xanthate
incereases hydrophilicity of the surface
7
Q
froth stablizers
A
cresol anisoles
8
Q
dressing of the ore
A
removal of gangue from the powered ore
9
Q
frothfloation is used for
A
sulphide ion
10
Q
roasting
A
heating strongly below its melting point
