Patent ID: 6241514
Filing Date: 2001-06-05
Classification: F27B

Abstract:
An apparatus for recycling dust in a kiln useful for producing clinkers, comprising:a kiln chamber having an inlet and a outlet;a first burner positioned so that its flame is directed into said kiln chamber;a recycle dust source for providing a fluidized recycled dust stream into said kiln chamber and including a recycle dust feeder pipe having an outlet at a downstream end thereof, said recycle dust feeder pipe adapted to feed recycle dust to the first burner; andan oxidant source in fluid communication with the recycle dust source for providing a fluidized recycled dust and oxidant stream, wherein the oxidant source comprises an oxidant feeder pipe in fluid communication with the recycle dust feeder pipe at a point upstream of said recycle dust feeder pipe downstream end, and whereinthe recycle dust feeder pipe has a diameter D, andfluid communication between the recycle dust feeder pipe and the oxidant feeder pipe is established at a distance L from an end of said recycle dust feeder pipe, the ratio of L/D being between 0.25 and 4.0.