Abstract: The automatic regulator device comprises a channel for measuring the level and density of pulp in the chamber of a floatation machine, in which two bubbling pipes are in communication with a differential pressure pickup connected to the input of a frother flow-rate regulating channel and to one input of a correction unit whose other input is connected to a pressure pickup communicating with one of the bubbling pipes. The output of the correction unit is connected to the input of a circuit designed to regulate the rate of flow of water with frother in a pulp level stabilizing channel, the output of said circuit being connected to an actuator valve installed on a pipeline feeding water with frother and furnishing a control signal with respect to a pulp level deviation from a preset value.

Abstract: The automatic control device comprises a channel used to measure the level and density of pulp in a chamber of a floatation machine, in which two bubbling tubes communicate with a differential pressure transducer connected to the input of a frother flow control channel and to the input of a correction unit whose other input is connected to a pressure transducer communicating with one of the bubbling tubes. The bubbling tubes are installed in hydrostatic tubes located outside the chamber and communicating therewith at different levels relative to the pulp level. The output of the correction unit is connected to the input of a circuit designed to control the flow rate of water and frother in a pulp level stabilizing channel and having its output connected to an actuator valve of a pipeline feeding water and frother.