From: Effects of alkali solution on the dissolution kinetics and optimization processes of iron from Akwuke ore
Agitation rates (rpm)
Surface chemical
Diffusion controlled
Ks (min¯1)
R2
Kd (min¯1)
90
0.0025
0.918
0.0021
0.995
190
0.0023
0.981
0.0022
0.998
290
0.974
0.0020
0.987
390
0.0018
0.973
0.0017
0.978
490
0.0019
0.970
0.0016
0.976