9. The temperature in the calcining zone of a vertical shaft kiln used in the manufacture of quicklime is about
A. 550C
B. 1000C
C. 400C
D. 275C
9. The temperature in the calcining zone of a vertical shaft kiln used in the manufacture of quicklime is about
A. 550C
B. 1000C
C. 400C
D. 275C