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Journal articles
Effects of Pulp Furnish and Refiner Speed on Residence Time in a High-Consistency Refiner, TAPPI JOURNAL, April 1998, Vol. 81(4)
Effects of Pulp Furnish and Refiner Speed on Residence Time in a High-Consistency Refiner, TAPPI JOURNAL, April 1998, Vol. 81(4)
Journal articles
1997 pulping conference marks division's 50 years of meetings, TAPPI JOURNAL, April 1998, Vol. 81(4)
1997 pulping conference marks division's 50 years of meetings, TAPPI JOURNAL, April 1998, Vol. 81(4)
Journal articles
Alliances forged at the 1997 Biological Sciences Symposium, TAPPI JOURNAL, April 1998, Vol. 81(4)
Forest biologists forge alliances with industry at the 1997 biological sciences symposium, TAPPI JOURNAL, April 1998, Vol. 81(4)
Journal articles
What's next for greater prosperity?, TAPPI JOURNAL, April 1998, Vol. 81(4)
What's next for greater prosperity?, TAPPI JOURNAL, April 1998, Vol. 81(4)
Journal articles
A snapshot of the current state of cluster compliance for kraft mills, TAPPI JOURNAL, April 1998, Vol. 81(4)
A snapshot of the current state of cluster compliance for kraft mills, TAPPI JOURNAL, April 1998, Vol. 81(4)
Journal articles
Impact of pulp chemical composition on recycling, TAPPI JOURNAL, December 1998, Vol. 81(12)
Impact of pulp chemical composition on recycling, TAPPI JOURNAL, December 1998, Vol. 81(12)
Journal articles
Representative groundwater sampling using low-flow methods, TAPPI JOURNAL, December 1998, Vol. 81(12)
Representative groundwater sampling using low-flow methods, TAPPI JOURNAL, December 1998, Vol. 81(12)
Journal articles
A comparison of recovery boiler field experiments using various nox reduction methods, TAPPI JOURNAL, December 1998, Vol. 81(12)
A comparison of recovery boiler field experiments using various nox reduction methods, TAPPI JOURNAL, December 1998, Vol. 81(12)
Journal articles
Magazine articles
External fibrillation of wood pulp, TAPPI Journal June 2023
ABSTRACT: Pulp refining produces external fibrillation consisting of fibrils tethered to fiber surfaces, in addition to loose fibrils and fines. Both contribute to a larger bonding area that increases paper strength, but tethered fibrils have less likelihood of being washed out during papermaking. This study postulates the mechanism by which refining produces external fibrillation and the optimum conditions for doing so.The postulated mechanism is surface abrasion during sliding of fibers in refiner gaps. External fibrillation occurs when forces are great enough to partially dislodge fibrils from fiber surfaces, but not large enough to break the fibrils. The refining intensities to achieve these forces were determined by a mathematical model and experiments using a laboratory disc refiner. The optimum intensities in terms of specific edge load (SEL) for chemical pulps were about 0.1 J/m for hardwoods and 1.0 J/m for softwoods. An extension of this study suggested that abrasion may also account for most of the energy consumed in the mechanical pulping process.
Journal articles
Magazine articles
Evaluating the effect of recovery boiler operation on green liquor dregs concentration using multivariate analysis, TAPPI Journal June 2023
ABSTRACT: Poor settling and filterability of green liquor dregs has been a persistent problem in many kraft pulp mills. While the concentration and settling/filtering behaviors of dregs are expected to be related to how black liquor is burned in recovery boilers, the effect of boiler operation is not well understood. A systematic study was conducted to examine how recovery boiler operation may affect the dregs concentration in the raw green liquor (RGL) at three kraft pulp mills using SIMCA, a multivariate data analysis (MVDA) program. Daily average boiler operating data from three kraft mills were analyzed over a 3-year period. Results of both principal component analysis (PCA) and partial least squares regression (PLS) suggest that the main boiler operations contributing to high dregs concentrations in RGL are low liquor firing load, low bed temperature, poor char burning, and unstable char bed.