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Journal articles
The behavior of fibers in wet pressing, Solutions! & TAPPI JOURNAL, December 2003 (270KB)
The behavior of fibers in wet pressing, Solutions! & TAPPI JOURNAL, December 2003 (270KB)
Journal articles
Improvement of paper properties using starch-modified precipitated calcium carbonate filler, TAPPI JOURNAL & Solutions! February 2005, Vol. 4(2) (304KB)
Improvement of paper properties using starch-modified precipitated calcium carbonate filler, TAPPI JOURNAL & Solutions! February 2005, Vol. 4(2) (304KB)
Journal articles
An examination of two hybrid top-wire former configurations for producing newsprint, TAPPI JOURNAL, October 2003, Vol. 2(10) (300KB)
An examination of two hybrid top-wire former configurations for producing newsprint, Solutions! & TAPPI JOURNAL, October 2003, Vol. 2(10) (300KB)
Journal articles
Bleaching study of kenaf mechanical pulps, Solutions! & TAPPI JOURNAL, August 2003, Vol. 2(8) (167KB)
Bleaching study of kenaf mechanical pulps, Solutions! & TAPPI JOURNAL, August 2003, Vol. 2(8) (167KB)
Journal articles
A new retention aid for the production of SC printing grades: pilot paper machine results, TAPPI JOURNAL, September 2003, Vol. 2(9) (255KB)
A new retention aid for the production of SC printing grades: pilot paper machine results, Solutions! & TAPPI JOURNAL, September 2003, Vol. 2(9) (255KB)
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
Experiences with lower furnace tube cracking, TAPPI JOURNAL & Solutions! January 2005
Experiences with lower furnace tube cracking, TAPPI JOURNAL & Solutions! January 2005
Journal articles
Biopulping of whole jute plant in soda-anthraquinone (AQ) and kraft processes, TAPPI JOURNAL & Solutions! March 2005, Vol. 4(3)
Biopulping of whole jute plant in soda-anthraquinone (AQ) and kraft processes, TAPPI JOURNAL & Solutions! March 2005, Vol. 4(3)
Improving refining efficiency with deflocculation, TAPPI Journal May 2022
ABSTRACT: The ability to load a refiner requires the formation of a fiber mat between opposing refiner bars. One of the consequences of this is the formation of flocs that persist through the refiner grooves and exit the refiner. These flocs interfere with sheet strength, requiring additional energy to make up the strength deficit. In addition, flocs can initiate string formation, resulting in machine efficiency issues such as cross-machine profile deterioration and the downtime required to correct it. Novel refiner plate modifications have been shown to improve refining efficiency in otherwise identical refiner plates. Energy savings are typically around 15% of gross refining energy on the basis of the treated stock, although much higher reductions have also been seen. Addressing this previously underappreciated flaw in conventional refining enables greenhouse gas reduction and other benefits related to sheet strength and machine efficiency.
Energy saving potential of interstage screen fractionation for production of board grade BCTMP, TAPPI Journal August 2023
Over the last few decades, the continuing decline in mechanical pulp-based grades has led pulp producers to modify operations and implement measures to reduce production costs in order to stay competitive. In spite of a considerable effort to reduce energy consumption, the latter is still a major portion of production costs in the process of making bleached chemithermomechanical pulp (BCTMP). In this study, we evaluated the impact of interstage screening fractionation (ISSF) and secondary refining strategy for producing BCTMP with the objective of reducing refining energy consumption while maintaining or improving bulk and strength properties. In the first step and to establish a baseline for a mill’s existing configuration, the collected primary refined pulp and reject streams from the ISSF were refined in a high consistency (HC) refiner to target freeness levels. The accepts and refined rejects streams were recombined, and their properties were compared to those of the refined primary pulp. The results showed that, at a given freeness of 400 mL and compared to the control case (without fractionation), the ISSF using an 0.070 in. basket followed by rejects refining could lead to about 25% energy saving in the second stage HC refining. Handsheet properties showed that utilization of ISSF could produce BCTMP with higher bulk and similar average fiber length and tear index. However, a slight reduction in tensile strength was observed. In the second set of trials, the primary refined pulp and the rejects from the ISSF using the 0.070 in. basket were refined by a low-consistency (LC) refiner. The results showed that, at the same freeness of 400 mL and compared to refined primary pulp, the ISSF saved about 26% in net LC refining energy. At a specific edge load (SEL) of 0.4 J/m, the produced pulp had similar bulk and strength properties compared to those of the control sample. A higher SEL of 0.6 J/m in LC refining could further decrease net refining energy consumption; however, it also led to reduction in fiber length, bulk, and strength properties.