2-1 Recausticizing - Principles and Practice - TAPPI

Recausticizing - Principles AND Practice Dale R. Sanchez Process Specialist - Recausticizing Vector Process Equipment Inc. 2079 Gordie Tapp Crescent Burlington, ON L7M 3T9 Email: OVERVIEW The Recausticizing process produces cooking liquor for the digester from recycled inorganic chemicals generated in the recovery boiler and lime kiln. The process involves one very simple chemical reaction followed by process steps utilizing various types of liquid solid separation equipment. Cooking liquor (white liquor) for the kraft process is produced from smelt generated in the recovery boiler. Quick lime is slaked in the smelt solution (green liquor) producing white liquor and calcium carbonate (lime mud). The calcium carbonate is calcined in a lime kiln to produce quick lime. The lime mud is washed to reduce it s chemical content before it is fed into the lime kiln and the wash liquor (weak wash) generated is recycled to dissolve the smelt to produce green liquor.

aluminum to name a few1. These generally are not troublesome unless the system is not designed with a means of purging. Mills in Asia that use bagasse, or straw pulps ... steps involve liquid/solid separation and washing of lime mud by dilution and displacement washing. Displacement washing is accomplished on a filter.

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