Alumina from Bauxite Flashcards
1
Q
Bauxite
A
aluminium ore
2
Q
ore
A
Naturally, occurring material from a metal can be extracted
3
Q
slurry
A
A semi liquid material containing fine solid particles
4
Q
Flocculants
A
Substance that causes particles to clump together
5
Q
sedimentation
A
Small solid particles, setting at the bottom of a liquid
6
Q
Calcination
A
using high temperature to remove water
7
Q
describe the Bayer process
A
1) bauxite crashed into small grains
2) Hot caustic, soda dissolve, aluminium materials called digestion, create slurry
3) slurry is filtered
4) cool down, flocculence added NAOH recovered and reused
5) calcination
8
Q
what happens in calcination?
A
2Al (OH3) > Al2 O3 + 3H 2 O
