Figure 4. Plot of %Al extracted versus time (at NaOH:CFA = 3.5, Temperature = 700°C)

From

Kinetics of Recovery of Alumina from Coal Fly Ash through Fusion with Sodium Hydroxide

M A Rahaman, M A Gafur, A S W Kurny

American Journal of Materials Engineering and Technology. 2013, 1(3), 54-58 doi:10.12691/materials-1-3-6