Characterization and Optimization of Calcination Process Parameters for Extraction of Aluminum from Ethiopian Kaolinite

Table 8

Comparison of the present study with various literature.

Origin of kaolinite	Optimum calcination conditions	Extraction yield of aluminum (% w/w)	References
Nigerian	600°C, 60 min, and 300 μm	50.27	[21]
Saudi Arabian	600°C, 60 min, and 149 μm	63	[25]
Iraqi	700°C, 120 min, and 125 μm	70	[19]
Chinese	800°C, 180 min, and 44 μm	98.7	[20]
Egyptian	850°C, 120 min, and 90 μm	75	[26]
Egyptian	700°C and 120 min	81.33	[44]
Jordanian	700°C, 180 min, and 75 μm	79.28	[45]
Ethiopian	700°C, 180 min, and 106 μm	71.28	This study