Process Compatible SO2 Control In Cement Kilns
The raw mill and preheater/precalciner use kiln exhaust gases to dry, heat and calcine the raw feed before it enters the kiln. The counter flow of raw materials and exhaust gases in the raw mill and preheater act as an inherent semi dry (raw mill) and dry scrubber (preheater) to control SO 2 emissions. Some SO 2 may also be dry scrubbed in the baghouse particulate control system.