The FLSmidth Automation Folaphone system is designed for monitoring and supervision of the material charge in a ball mill. The system is developed for applications in the cement industry.

Features
- On-line continuous control of the filling charge of material
- Simple system - easy installation
- Low maintenance

Description
The Folaphone system comprises of:
- Magnetic microphone
- Microphone amplifier (two-wire transmitter)
- "Signal Treatment" - wall cabinet with amplifiers for treatment of the  Folaphone signal (optional)
- Support for mounting of the microphone (optional)

The purpose of the system is to report the variations in the load of material during mill operation, and (optionally) to generate alarms when the mill is being overfilled or insufficiently filled.

The Folaphone system consists of a measuring transducer, which transforms the mill shell vibrations (equal to mill noise/sound) into an electric signal.

When the measured sound intensity from the mill increases, it indicates that the material level in the mill is becoming lower and vice-versa when the sound intensity decreases.