PROCESSING METHOD OF CHLORINE BYPASS DUST AND EXHAUST GAS

摘要

PROBLEM TO BE SOLVED: To treat a chlorine bypass dust while inhibiting increase of agent cost and heavy metal concentration in a clinker and securing stability of quality of cement as well as to treat a chlorine bypass exhaust gas with avoiding coating troubles by cement kiln or the like and inhibiting heat loss by a preheater or the like and without reducing clinker production amount.SOLUTION: There is provided a processing method of a chlorine bypass dust and an exhaust gas by extracting part of combustion gas G from kiln exhaust gas passage from a kiln tail of a cement kiln 2 to a lowermost cyclone with cooling to produce a slurry having Kconcentration and Clconcentration of 6 mass% or less respectively from the recovered chlorine bypass dust D4 in a chlorine bypass facility for recovering the chlorine bypass dust D4 from an extracted gas G1 and contacting the exhaust gas G4 of the chlorine bypass facility with the slurry. The SOconcentration of the slurry is 10000 mg/L or less.SELECTED DRAWING: Figure 1