Patent ID: 7959436

Claim:
In a rotary lime kiln, having a charging end and a discharge end, and a preheater positioned adjacent the charging end, with hot off gases containing solid particulates passing from the charging end of the kiln through limestone charge material in the preheater to heat the same prior to charging to the kiln through the charging end, the improvement comprising: a housing located adjacent to and communicating with the charging end of the kiln, such that a major portion of the hot off gases containing solid particulates from the charging end of the kiln, is directed into the preheater, while a minor portion of the off gases containing solid particulates is directed into the housing, and at least a portion of the solid particulates are separated from the hot off gases and collected in the housing, while the hot off gases from the housing, after removal of solid particulates, are directed into the preheater, wherein horizontal, spaced vanes are provided across an entry portal between the charging end of the rotary lime kiln and the housing.