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Reduction of alkali loss in an ash leaching system, TAPPI J

Reduction of alkali loss in an ash leaching system, TAPPI JOURNAL July 2017

Multiple recycling of paperboard: Paperboard characteristics and maximum number of recycling cycles— Part I: Multiple recycling of corrugated base paper, TAPPI Journal November 2019

ABSTRACT: Paper for recycling is an important fiber source for the production of corrugated base paper. The change in production capacity toward more and more packaging papers affects the composition of paper for recy-cling and influences the paper quality. This research project investigated the influence of the multiple recycling of five different corrugated base papers (kraftliner, neutral sulfite semichemical [NSSC] fluting, corrugating medium, testliner 2, and testliner 3) on suspen-sion and strength properties under laboratory conditions. The corrugated board base papers were repulped in a low consistency pulper and processed into Rapid-Köthen laboratory sheets. The sheets were then recycled up to 15 times in the same process. In each cycle, the suspension and the paper properties were recorded. In particular, the focus was on corrugated board-specific parameters, such as short-span compression test, ring crush test, corrugat-ing medium test, and burst. The study results indicate how multiple recycling under laboratory conditions affects fiber and paper properties.

Brad Southern is Reforming Louisiana Pacific, Paper360º November/December 2019

Brad Southern is Reforming Louisiana Pacific, Paper360º November/December 2019

The solubility of calcium carbonate in green liquor handling systems, TAPPI Journal October 2019

ABSTRACT: The formation of hard calcite (CaCO3) scale in green liquor handling systems is a persistent problem in many kraft pulp mills. CaCO3 precipitates when its concentration in the green liquor exceeds its solubility. While the solubility of CaCO3 in water is well known, it is not so in the highly alkaline green liquor environment. A systematic study was conducted to determine the solubility of CaCO3 in green liquor as a function of temperature, total titratable alkali (TTA), causticity, and sulfidity. The results show that the solubility increases with increased temperature, increased TTA, decreased causticity, and decreased sulfidity. The new solubility data was incorporated into OLI (a thermodynamic simulation program for aqueous salt systems) to generate a series of CaCO3 solubility curves for various green liquor conditions. The results help explain how calcite scale forms in green liquor handling systems.

Alias Impact on Control Profiles, 19PaperCon

Alias Impact on Control Profiles, 19PaperCon

Continuous Cross Machine Formation by Wavelet Transform Analysis, 19PaperCon

Continuous Cross Machine Formation by Wavelet Transform Analysis, 19PaperCon

The Next Generation of QCS Service and Optimization, 19PaperCon

The Next Generation of QCS Service and Optimization, 19PaperCon

FULL WEB DIRT MEASUREMENT FOR PULP AND PAPER, 19PaperCon

FULL WEB DIRT MEASUREMENT FOR PULP AND PAPER, 19PaperCon

Characterization of Tissue Uniformity to Help Enhance Tissue Machine Runnability and Converting Efficiency, TAPPICon22

High Build, Single Coat Epoxy Maintains Critical Path Schedule on Pipeline Rehabilitation Project in International Paper Company’s Mansfield Mill, TAPPICon22