ABSTRACT Recausticizing Lime Kiln are one of area in PT. RAPP that responsible to produce cooking liquor (white liquor) to cook wood chips in digester. Causticizing reaction result the side product called lime mud (CaCO3) which able to turn into lime (CaO). This process need lime kiln unit to burn the lime mud and react to form lime through calcination reaction. The quality of product deteā¦