The froth-free water Exits the Float Tank


A portion of the clarified effluent water leaving the DAF tank is pumped into a small pressure vessel (called the air drum) into which compressed air is also introduced. This results in saturating the pressurized effluent water with air. The air- saturated water stream is recycled to the front of the float tank and flows through a pressure reduction valve just as it enters the front of the float tank, which results in the air being released in the form of tiny bubbles. The bubbles adhere to the suspended matter, causing the suspended matter to float to the surface and form a froth layer which is then removed by a skimmer. The froth-free water exits the float tank as the clarified effluent from the DAF unit.
Advantages:1. High separation precision, low plant ash, high yield.2. Large quantity, the unit volume capacity is 2 ~ 3 times of conventional Flotation machine .3. The operation cost is low, saving power 1/3 to 1/2.4. The flotation machine tub has no moving parts, easy to maintain.5. Strong adaptability for coal quality.6. Small footprint, saving construction investment. 7.Simple operation, high degree of automation.8. Light weight.
Working principle of HGM series Amphibole grinding mill:
HGM series Amphibole grinding mill mainly consist of main unit, classifier, powder collector, dust cleaner, blower, muffler, sound-proof room, crusher, bucket elevator , storage hopper, and Vibrating feeder .After crushed by Hammer crusher , the large materials become small ones and are sent to storage hopper by elevator, and then evenly sent to the upper distribution plate of the turnplate by vibrating feeder and sloping feeding pipe.

Ball mills :
dry process rotary kiln :

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