The level of the sand pump pool has a great influence on the work of the sand pump, and it will cause the slurry to overflow from the pump pool or the air to enter the sand pump. The running speed of the sand pump directly affects the ore supply of the cyclone and the classification effect of the cyclone. The liquid level control of the sand pump pool not only facilitates the grinding operation, but also creates favorable conditions for the flotation operation.
A level gauge 5 is installed in the sand pump tank, and a concentration meter 6 and an electromagnetic flow meter 7 are installed on the outlet line of the sand pump. The set value for ratio 5 is the ratio of flow to liquid level (approximately 4.0). When the liquid level rises, the ratio 5 is calculated as the given value of the slurry flow rate, and compared with the measured value of the flow rate, the deviation is calculated by the controller PI7, the control amount is output, the hydraulic coupling hydraulic pressure is adjusted, and the sand pump rotation speed is increased. Increase the slurry flow (the amount of the cyclone feed) to maintain the relative height of the sand pump pool level and vice versa. The control schematic diagram is shown in Figure (IV).

Figure Rod Mill - Cyclone Control System Block Diagram

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