The Rotary Lime Kiln

Some rotary lime kilns operate under reducing conditions by curtailing the combustion air to substoichiometric levels so as to volatilize any sulfur that may be in the limestone in order to meet the stringent sulfur specifications imposed by steel and chemical users. For most operations except for dead-burnt dolomite, the burner tip velocities 

Chapter 10 Rotary Kiln Minerals Process Applications 

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D.J. Kramm, Selection and use of the rotary lime kiln and its auxiliaries — Parts 1 and 2, Paper Trade Journal, July/Aug. 1972. 

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