The History Behind Lime Kilns Wabash Erie Canal Homepage PROCESSING LIMESTONE TO MAKE PLASTER The heating of limestone to produce marketable material such as quicklime involves a process of burning roasting or
Limestone CaCO 3 is charged into the preheater and heated with the counter current combustion products Then preheated materials enter the rotary kiln Rotation of the cylindrical kiln and its inclination forces the materials to move slowly with homogeneous temperature to the kiln outlet A gas burner resides at the end of the rotary kiln
In later more efficient designs the fuel would be fed directly into the hottest part of the kiln and limestone alone would be fed to the top Fig 6 Principles of operation of a continuous process lime kiln Relatively early kilns would be filled with alternate layers of fuel and limestone as shown here
The lime kiln is an important part of the recaust and recovery process in a mill In the evaporation section of the kiln chains which drag through the lime mud increase the drying area and evaporation rate of the kiln Heat for the calcining reaction is supplied by a large burner at one end of the kiln
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