Recent Results from EAPC / Lo-Solids Trials at Enso's Varkaus Pulp Mill, 1998 Pulping Conference Proceedings

The enhanced alkaline profile cooking is a patented new pulping process, developed based on extensive laboratory studies. It seeks to optimize the cooking EA concentration profile for improving pulping selectivity and pulp strength properties, particularly tear strength, through controlled sequential white liquor additions and cooking liquor recirculation.

After the first successful mill trials of the new process in May 1996, process modifications were made to a two-vessel digester system for the implementation of the new cooking process in 1997 at Enso Fine Papers’ Varkaus pulp mill.

Upon completion of the retrofit in September 1997, cooking trials were conducted in late 1997 and early 1998 with promising results.

This paper will describe the process changes made for implementing the new cooking technology, and discuss the results obtained so far in light of digester operation, process chemistry and pulp properties.

Author: Kettunen, A., Jiang, J. E., Ramark, H., Laakso, R., Kortelainen, V. -A., Kervinen, E.
Recent Results from EAPC / Lo-Solids Trials at Enso's Varkau
Recent Results from EAPC / Lo-Solids Trials at Enso's Varkaus Pulp Mill, 1998 Pulping Conference Proceedings
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