aggregate flotation process for fine coal Finland

Jul 04 2001 · Purchase Coal Flotation and Fine Coal Utilization Volume 14 1st Edition Print Book EBook ISBN 9780444505378 9780080529240

Numerous literatures show that the ultrasound with a low frequency ranging between 20 and 40 kHz is often used to assist flotation of fine coal Therefore ultrasonic cavitation rather than acoustic streaming is considered to be the main principle in ultrasonicassisted fine coal flotation

aggregate flotation process for fine coal the coal particles aggregate with each other easily and then the coal particles may agg processing ore on bitumen is responsible for the corresponding low bitumen aggregate flotation process for fine coal

Two coal samples obtained from BHP Billiton Mitsubishi Alliance BMA and Xstrata were tested to represent coarse coal flotation and fine coal flotation respectively Saline water with low medium and high ionic strengths and individual electrolytes encountered in the flotation plants were used

The flotation process involves coal water collector and bubbles The interactions among coal water and the collector during pulp conditioning play a significant role in froth separation To understand these interactions the water–coal oil–coal and oil–water–coal contact angles were measured and analyzed

To summarize it could be said that 1 Coal particles aggregate in the flotation pulp Magnitude of aggregation depends on the coal rank and the amount of oil and the presence of promoters in the system Aggregation to a large level is the responsible reason for the selectivity problems which hamper coal flotation

FIGURES ysisofESfeedcoalKY1114 ysisofESproductKY1114 ialtreatmentofESproductandcoal16 copicviewsofESsample18 5

The different flotation behaviour of these clayey coal samples in deionised water and saline water may be linked with the association of clay platelets Higher recovery of clay minerals may be obtained if they enter the froth as aggregates This in turn increases froth stability and combustible recovery

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