Reduction of alkali loss in an ash leaching system
C. C. R. Medeiros, F. A. Silva, S. G. Pignaton, E. V. Zutautas, and K. Figueiredo
TAPPI JOURNAL,16(7)
There are many points in a kraft mill where the alkaline compounds are purged from the process. Several effluents, solid waste, and air emissions contain alkali, which leads to the necessity of chemical makeups to maintain the liquor balance. The main loss of alkali at the Veracel mill is present in the wastewater from the recovery boiler; more precisely, it is from the ash leaching system, which represents 80% of the total losses.
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