Cement additive for oil-well casings, absorbent for oil spills (silicone-coated), to replace lime in scrubbing sulfur dioxide from flue gas, as a filler in plastics, source of germanium (England), proposed as catalyst for coal liquefaction, removal of hea
The very fine ash produced by combustion of powdered coal with forced draft and often carried off with the flue gases. Special equipment is required for effective recovery, e.g., electrostatic precipitators. Fly ash is a mixture of alumina, silica, unburn
