Mineral Phase and Physical Properties of Red Mud Calcined at Different Temperatures

Figure 5

The SEM images of red mud (a) uncalcined and calcined at (b) 150°C, (c) 450°C, (d) 600°C, (e) 900°C, and (f) 1200°C.

(a)

(b)

(c)

(d)

(e)

(f)