J. D. Bittner, S. A. Gasiorowski, W. Lewandowski and B. Bruckner, Separation Technologies - LLC Technical Center, Needham, USA

 Separation Technologies LLC (ST) has been operating commercial fly ash beneficiation systems since 1995.  ST’s electrostatic beneficiation technology reduces the carbon content of coal fly ash, producing a consistent, low carbon ash for use as a substitute for cement. Fly ash with carbon levels > 25% have been used to produce ash with a controlled carbon level of 2 ± 0.5%.  A carbon rich product is simultaneously produced to recover the fuel value of the carbon.

ST’s newest project in Poland which includes a wet-to-dry ash collection conversion and an ST carbon separator was successfully commissioned in May 2010.