Holcim S.A. Nobsa Plant – 2011

MAINTENANCE OF THE ATTOX RAW MILL

PROBLEM

There was wear on the bearings of the ATTOX raw mill rollers and increased the oil consumption of the rollers, and this was generating shots in the lubrication unit.

SOLUTION

Assembly of the new bearings, replacement of retainers and repair of the rollers to minimize the oil consumption and continue with the normal operation of the mill.

RESULTS

New bearings and retainers to the raw mill rollers, decrease of the oil consumption and a normal operation of the mill.

REPLACEMENT OF THE CYCLONE DIP TUBE NO. 3

PROBLEM

The cyclone dip tube No. 3 was worn because of the temperature and then it lose all of this duct and this created problems of fake air inside the cyclone.

SOLUTION

Assembly of the new dip tube original in stainless steel according to the design of FLSmidth.

RESULTS

Optimization of the process, taking again to normal operation and to the appropriated temperature the preheating system in the cyclones.