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Peter Paone, Manager of Pyroprocessing at FLSmidth presented a paper titled "Mercury Controls for the Cement Industry" at the 2010 IEEE Cement Industry Conference. He provided insight into FLSmidth's patent pending Mercury Roasting system and alternative methods of Hg removal. The Mercury Roasting system, which has been pilot tested but not yet installed in a full plant application, uses hot gas (typically from a kiln gas bypass or cooler take-off) to re-volatize the Hg in the dust in the internal loop between the main baghouse and the kiln. The Hg is captured in a Gas Suspension Absorber system. (The dust is returned to the system and the sorbent and Hg is either wasted or used as a cement additive in the finish milling. The dust is separated in an ESP and the sorbent is collected in a baghouse. |
