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Journal articles
Recovery of water-soluble acetylgalactoglucomannans from mechanical pulp of spruce, TAPPI JOURNAL, November 2003, Vol. 2(11) (145KB)
Recovery of water-soluble acetylgalactoglucomannans from mechanical pulp of spruce, Solutions! & TAPPI JOURNAL, November 2003, Vol. 2(11) (145KB)
Journal articles
Refiner mechanical pulp from kenaf for newsprint manufacture, Solutions! & TAPPI JOURNAL, April 2004, Vol. 3(4) (297KB)
Refiner mechanical pulp from kenaf for newsprint manufacture, Solutions! & TAPPI JOURNAL, April 2004, Vol. 3(4) (297KB)
Journal articles
Magazine articles
How to use total dissolved solids measurements to evaluate the performance of diffuser washers—A mill study, TAPPI Journal April 2020
ABSTRACT: Various types of pulp washing equipment are available. Each washing device has a unique mechanical construction, and the washing principle is often a combination of dilution, thickening, and displacement washing. In this work, the performance of the pressure diffuser washer is studied. In stepwise trials, the effect of the feed and discharge consistencies on the performance of the diffuser was studied. The effect of the downward velocity of the screen on the pressure diffuser’s washing efficiency was also studied. The measurement of total dissolved solids (TDS) by a process refractometer was used as a wash loss measurement unit and the refractometer’s results were used in the calculations of standardized Nordén efficiency (E10) values. The chemical oxygen demand (COD) and conductivity values were also measured and their results compared to the TDS results.The results indicated that feed consistency has a significant effect on the performance and effectiveness of the diffuser washers in the mill. It can also be stated that when the downward velocity of the screen is adjusted to too high a level, the washing efficiency of the pressure diffuser decreases. As a conclusion from the mill tests, it can be stated that even small process parameter changes can provide enhanced diffuser washing at the beginning of the washing line, which has a direct effect on the performance of post-oxygen washing.
Journal articles
Magazine articles
Mill experience of calcium carbonate scale formation in green liquor pipelines, TAPPI Journal August 2020
ABSTRACT: Experience of hard calcite (CaCO3) scale formation in green liquor pipelines at four kraft pulp mills was systematically investigated to determine if there is any correlation between the severity of the scaling problem at each mill and the design and operating conditions of its causticizing plant. The results show that the high degree of supersaturation of calcium ions (Ca2+) in the liquor is the main contributing factor. Mills that operate at a lower green liquor total titratable alkali (TTA), higher causticity, and a larger liquor temperature drop are more likely to produce a green liquor that is supersaturated with Ca2+, and thus experience more severe scaling problems. In order to minimize CaCO3 scaling, the green liquor handling equipment should be operated as steady as possible to avoid conditions that allow Ca2+ to be supersaturated. The strategies include minimizing variations in liquor TTA, insulating the green liquor pipelines to reduce temperature gradients, and adding lime mud to weak wash to provide seeds for precipitation to occur on mud particles instead of on metal substrate.
Journal articles
Profiling the wood and pulping properties of southern pine thinning resources, TAPPI JOURNAL & Solutions! January 2005
Profiling the wood and pulping properties of southern pine thinning resources, TAPPI JOURNAL & Solutions! January 2005
Journal articles
A useful equation for estimating the surface charge of pulp fibers, TAPPI JOURNAL May 2005, Vol. 4(5)
A useful equation for estimating the surface charge of pulp fibers, TAPPI JOURNAL May 2005, Vol. 4(5)
Journal articles
Formation of sulfur-rich melt near the floor tubing of kraft recovery boilers, TAPPI JOURNAL, April 2002, Vol. 1(2) (192KB)
Formation of sulfur-rich melt near the floor tubing of kraft recovery boilers, TAPPI JOURNAL, April 2002, Vol. 1(2) (192KB)
Journal articles
TJ web enhancements, TAPPI JOURNAL, August 2002, Vol. 1(6) (
TJ web enhancements, TAPPI JOURNAL, August 2002, Vol. 1(6) (49KB)
Journal articles
High-yield pulping of switchgrass, Solutions! & TAPPI JOURNAL, August 2002 (144KB)
High-yield pulping of switchgrass, Solutions! & TAPPI JOURNAL, August 2002 (144KB)
Journal articles
The relationship between Kappa Number and Oxidizable Structures in Bleached Kraft Pulps, JOURNAL OF PULP AND PAPER SCIENCE: VOL. 28 NO. 8 AUGUST 2002 [02AUGJP262.pdf]
The relationship between kappa number and oxidizable structures in bleached kraft pulps, Journal of Pulp and Paper Science, August 2002, Vol. 28(8) (107KB)