In modern kiln installations, the riser ducts and calciners take the form of large masonry-lined plant sections of great structural height. Employees must be protected against falling encrustations and refractory material when repairs are being made in the kiln inlet chamber and the preheater.
The following safety precautions are customary in the cement industry before work is performed in preheaters:
Visual inspection of the masonry by experienced colleagues for condition and encrustations
Removal of encrustations in the riser duct from the inside by industrial climbers or from...