ANDRITZ´ New Technologies Applied to Yield Increase – A-yield Processes, 2015 PEERS Conference

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Wood is the biggest variable cost for pulp maker and especially the yield of softwood with today´s kraft pulping technology is quite low. This paper discusses new possibilities to improve pulp yield.  ANDRITZ has developed technology and processes to enhance pulp yield in cooking and in brown stock treatment. The following A-yield processes are covered: Thin chip and high kappa cooking, polysulfide cooking, displacement washing with DD-washers, strong oxygen delignification and screen room location after oxygen delignification. For polysulfide cooking, mill experience is also explained. 

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Author: Hannu Råmark, Jussi Piira, Kirsi Hirvonen, and Outi Poukka
ANDRITZˆ New Technologies Applied to Yield Increase • A-yiel
ANDRITZˆ New Technologies Applied to Yield Increase • A-yield Processes, 2015 PEERS Conference

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