Effects of plate wear on bar forces and fiber properties in a mill scale LC-refiner
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Matthias Aigner
,
James Olson
Abstract
A set of piezo electric force sensors is implemented in a 52-inch mill-scale low consistency refiner to explore the effect of refiner plate wear on bar force sensor measurements. The sensor replaces a short length of a stator bar and measures normal and shear forces applied during the passage of each rotor bar. In previous work with this type of force sensor, force profiles for individual bar passing events (BPE) were investigated. In the work presented here, force profiles for individual BPEs are identified based on key features in the time domain force data. The individual bar force profiles are classified as single peak events which feature one peak corresponding to the fiber compression force and as dual peak events corresponding to fiber compression force and the corner force. The bar passing events are then analysed, based on dual peak ratio and time to peak of the early peak in the dual peak events. Force measurements are evaluated over the full run time of a set of refiner plates. Findings are compared with refiner plate wear measurements and discharge fiber analysis. It is shown that the decrease in the prevalence of the corner force correlates with the wear of the leading edge of the refiner bars or bar rounding of the run time of the refiner plate. This is accompanied by a decrease in plate performance which is represented by a decrease in fiber length and freeness reduction for the same refiner load.
Funding source: Canadian Network for Research and Innovation in Machining Technology, Natural Sciences and Engineering Research Council of Canada
Award Identifier / Grant number: 11R35297
Award Identifier / Grant number: 11R1977
Funding statement: This work is funded by a Collaborative Research and Development Grant provided by the Natural Sciences and Engineering Research Council of Canada (NSERC) (Grant Numbers: 11R35297 & 11R1977) and the following partners, who we thank for their ongoing support: AB Enzymes, Alberta Newsprint Company, Andritz, BC Hydro, Canfor, Catalyst Paper, FPInnovations, Holmen Paper, Meadow Lake Pulp (Paper Excellence), Millar Western, NORPAC, West Fraser, Westcan Engineering, and Winstone Pulp International.
Acknowledgments
The authors gratefully acknowledge the assistance of Chad Toth, Pat Cooper and their colleagues at the Catalyst Paper Excellence mill at Crofton BC during the preparation for and execution of the refining trials.
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Conflict of interest: The authors declare no conflicts of interest.
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© 2022 Walter de Gruyter GmbH, Berlin/Boston
Articles in the same Issue
- Frontmatter
- Chemical pulping
- Evaluation of fines separation from unbleached softwood kraft pulp using microperforated hole screens
- Evaluation of pulp and paper making properties of Caesalpinia decapetela
- Novel bulking technologies for cellulose fibres
- Mechanical pulping
- Interpretation of force profiles in mill-scale LC refining
- Effects of plate wear on bar forces and fiber properties in a mill scale LC-refiner
- Paper technology
- Research on the physical properties of calcium sulfate whisker and the effects of its addition on paper and its printing performance
- Preparation and properties of an intelligent adjustable functional paper for organic cultural relics
- Paper chemistry
- Application of DSA to improve strength of thermomechanical pulp blended paper
- Coating
- The influence of pigment modulus on failure resistance of paper barrier coatings
- Effect of filler additions on pilot-scale extrusion coating of paperboard with PLA-based blends
- Packaging
- Influence of paper properties on adhesive strength of starch gluing
- Environmental impact
- Interfering elements on determination of hexavalent chromium in paper materials with UV-vis spectrophotometry
- Nanotechnology
- Enhanced mechanical and gas barrier performance of plasticized cellulose nanofibril films
- Lignin
- The preparations of nanoporous carbon with multi-heteroatoms co-doping from black liquor powders for supercapacitors
- Miscellaneous
- Hybrid films from plant and bacterial nanocellulose: mechanical and barrier properties
- Mass-balance based soft sensor for monitoring ash content at two-ply paperboard manufacturing
- Investigation of the effect of light fastness on the color changes of maps prepared by electrophotographic digital printing
- Bulking of cellulose fibres – a review
- Preparation of O-HACC/HEC-acrylate emulsion and its application in paper protection
- Mineral-filled biopolyester coatings for paperboard packaging materials: barrier, sealability, convertability and biodegradability properties
Articles in the same Issue
- Frontmatter
- Chemical pulping
- Evaluation of fines separation from unbleached softwood kraft pulp using microperforated hole screens
- Evaluation of pulp and paper making properties of Caesalpinia decapetela
- Novel bulking technologies for cellulose fibres
- Mechanical pulping
- Interpretation of force profiles in mill-scale LC refining
- Effects of plate wear on bar forces and fiber properties in a mill scale LC-refiner
- Paper technology
- Research on the physical properties of calcium sulfate whisker and the effects of its addition on paper and its printing performance
- Preparation and properties of an intelligent adjustable functional paper for organic cultural relics
- Paper chemistry
- Application of DSA to improve strength of thermomechanical pulp blended paper
- Coating
- The influence of pigment modulus on failure resistance of paper barrier coatings
- Effect of filler additions on pilot-scale extrusion coating of paperboard with PLA-based blends
- Packaging
- Influence of paper properties on adhesive strength of starch gluing
- Environmental impact
- Interfering elements on determination of hexavalent chromium in paper materials with UV-vis spectrophotometry
- Nanotechnology
- Enhanced mechanical and gas barrier performance of plasticized cellulose nanofibril films
- Lignin
- The preparations of nanoporous carbon with multi-heteroatoms co-doping from black liquor powders for supercapacitors
- Miscellaneous
- Hybrid films from plant and bacterial nanocellulose: mechanical and barrier properties
- Mass-balance based soft sensor for monitoring ash content at two-ply paperboard manufacturing
- Investigation of the effect of light fastness on the color changes of maps prepared by electrophotographic digital printing
- Bulking of cellulose fibres – a review
- Preparation of O-HACC/HEC-acrylate emulsion and its application in paper protection
- Mineral-filled biopolyester coatings for paperboard packaging materials: barrier, sealability, convertability and biodegradability properties
