METHOD OF AUTOMATIC CONTROL OF FLOATATION MACHINE AND DEVICE FOR CONTROL OF SUCH MACHINE Russian patent published in 2002 - IPC

FIELD: concentration of minerals; mining industry, metallurgy and other industries. SUBSTANCE: propose method includes measurement of parameter being monitored, comparison of present magnitude of this parameter with preset one and taking pulp from two zones depending on difference between preset and present magnitudes of parameter. Parameter being monitored is density of pulp in dispersing and main mixing zone in immediate proximity of impeller. Density of pulp is maintained at deviation of ±10% of the preset value. If pulp density reduces by more than 10% of preset value, pulp is taken from low-density zone located in mineralization zone; in case pulp density is beyond ±10%, pulp is taken from sand zone; in case pulp density exceeds preset magnitude by more than 15%, air shall be additionally fed to dispersion and main mixing zone. Device proposed for realization of this method includes sensor and parameter setter which are connected to regulator inputs two outputs are connected to actuating mechanisms of device for alternate shutting- off of sand and drain holes. Connected to third output of regulator is unit for control of air supply to dispersion and main mixing zone to which actuating mechanism is connected. Parameter sensor is just pulp density sensor mounted in dispersion and main mixing zone in immediate proximity of impeller. Drain hole is located above impeller. EFFECT: enhanced operational efficiency of floatation machine and increased service life. 3 cl, 1 dwg