The flotation of fine (− 0.5 mm) low rank or oxidized coal is difficult to achieve with the
common coal flotation collectors like kerosene, fuel oil or diesel oil (oily collector). The …

Coal flotation is a complex process involving several phases (particles, oil droplets and air
bubbles). These phases simultaneously interact with each other and with other species such …

Oxidized coals are difficult to float. Therefore, in this paper, a special flotation procedure was
investigated for upgrading this type of coal. The procedure is called direct contact flotation. It …

Relatively large amounts of hydrocarbons such as fuel oils are often needed in the flotation
of low rank coals. The amount of oil can be decreased considerably by using surfactants as …

Froth flotation has emerged as an effective and useful technique for separation of low
volatile medium ash clean coal fines. The traditional flotation collector is diesel oil. However …

The use of tri-block copolymer surfactants as flotation promoters to enhance the recovery of
poorly floating components of coal is examined. Previous study of the flotation response of …

The potential use of PEO/PPO (polyethylene/polypropylene oxide) triblock co-polymers as
promoters to improve flotation of coal was investigated in this thesis. The results show that …

Oxidized coals face difficulties during their flotation and therefore belong to a group of
difficult-to-float materials. In this paper, different approaches tested to improve flotation of …

I would like to express my deepest thanks, gratitude and appreciation to Prof. Dr. Eng. Jan
Drzymała, my supervisor, first for his kind hospitality during my stay in Poland, second for his …