Magnetic clutches in the cement industry

IN the early days of the cement industry, when grinding units were of relatively small capacity, motors of 75 h. p. were sufficiently large for power purposes. With the introduction of ball and compeb mills carrying heavy charges of metallic grinding medium, and the building of larger units, motors of much larger capacity were required. The modern tube mill uses a motor within the range of 200 to 600 h. p.