Question

Rotary kiln used in manufacturing cement rotates at a speed of-

• A. 1 r.p.m - 3 r.p.m
• B. 10 r.p.m - 12 r.p.m
• C. 18 r.p.m - 22 r.p.m
• D. More than 25 r.p.m

Answer 1

The correct option is A 1 r.p.m - 3 r.p.m

A rotary kiln is a pyroprocessing device used to raise materials to a high temperature (calcination) in a continuous process, Kilns usually rotate 1 to 3 rpm, but sometimes as fast as 5 rpm.