Bayers process reactions

Bayers Process

2. Variation of Silica Concentration with
Temperature at 800 gpl bauxite

3. Variation of Silica concentration in liquor at different
bauxite solids concentration at 90°C
25
200 gpl

200 gpl
400 gp!

500 gpl
00 gpl

4. Ciboatesolubily data in caustic liquors

E

Temperature (°C)

5. Bosnie solubilty data in cause iquors

Temperature, °C

6. Digestion Efficiency vis Holding Time at Atmospheric Pressure
(106°C) and at 210 gp! Na2O & 1.1 RP

7. Low Pressure Digestion
Digestion Eticioncy vis Temperatu
at 190991 N,0, 1-1 RP, JOmin. Fs. m

Temperature ©

8. ‘Comparison of Low Pressure and Atmospheric
Pressure Digestion of Gibbsite in Plant liquor

Ä
31
st
£1
zo
#0.

50 100 150 200 250 300 350
Caustic conc. (Na,O) gpl

10. Jar SettlingTest (Height vs Time)

450 7

Height, mm

10 15 20 25
Time, minutes

Deriving values from Settling Curve

450

Height, mm

13. Flux, kg/m? ‚hr

1
01
0.01
0.001
0.0001

Velocity Diagram

Solids Content, gpl

Solid Flux Diagram

22 330 440
Solid Content, gpl

14. Loading Diagram

30 40 50 60

16. Fig. 1 Effect of Na,0/Al,0;-MR and caustic concentration on

MA=1.45Ma%

MALI AS Na2O «10901

18. Fig. 3: Influence of the seed charge ‚with and without seed
filtration on the liquor productivity