Abstract:

Flotation，as an important part of the beneficiation，determines the quality level of beneficiation; the flotation effect is directly related to control of liquid level of the flotation tank. The automatic control system of liquid level in the flotation tank was discussed based on the engineering practice，the principle，process and realization method. Intelligent fuzzy control algorithm was used in flotation tank liquid level. The liquid level automatic control system of the pulp flotation machine consists of pulp level measuring device，level control instrumentation boxes，pneumatic control valves. The practical application results show that the liquid level automatic control system has the characteristics of advanced，economical，practical，durable and stable.

Key words: the flotation cell, liquid level, auto—control, application