Abstract: Flotation is an important link in the production of concentrator，and the liquid level is an indispensable parameter in the operation. The adjustment state has great influence on the production index. Aiming at the problem of unstable manual operation of the flotation machine in heating flotation operation of a tungsten ore，according to the actual situation on site，the real-time detection and control of the liquid level of the flotation machine were realized by changing the mechanical mechanism and adopting the inte⁃ grated liquid level control system，and the flotation production was stabilized. After the transformation，the grade of tungsten concentrate increased from 31.7% to 32.2%，and the recovery rate increased from 96.38% to 97.73%，indicating good application effect.

Key words: flotation, liquid level, real-time detection, accuracy control