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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
Nonwood pulping: use of jute cuttings and caddis in Bangladesh, TAPPI JOURNAL September 2013
Nonwood pulping: use of jute cuttings and caddis in Bangladesh, TAPPI JOURNAL September 2013
Journal articles
A laboratory study of recoveryboiler smelt shattering, TAPPI JOURNAL August 2014
A laboratory study of recoveryboiler smelt shattering, TAPPI JOURNAL August 2014
Journal articles
Could biomass-fueled boilers be operated at higher steam temperatures? Part 1: Laboratory evaluation of candidate superheater alloys, TAPPI JOURNAL August 2014
Could biomass-fueled boilers be operated at higher steam temperatures? Part 1: Laboratory evaluation of candidate superheater alloys, TAPPI JOURNAL August 2014
Journal articles
Pressures on webs in wound rolls due to winding and contact, TAPPI JOURNAL February 2014
Pressures on webs in wound rolls due to winding and contact, TAPPI JOURNAL February 2014
Journal articles
Effect of silicon on properties of causticized calcium carbonate produced in wheat straw soda pulping, TAPPI JOURNAL July 2014
Effect of silicon on properties of causticized calcium carbonate produced in wheat straw soda pulping, TAPPI JOURNAL July 2014
Journal articles
The contribution of pulp brightness and optical brightening agents to paper whiteness, TAPPI JOURNAL March 2014
The contribution of pulp brightness and optical brightening agents to paper whiteness, TAPPI JOURNAL March 2014
Journal articles
Magazine articles
Removal of silicon from green liquor with low-temperature precausticizing, TAPPI JOURNAL January 2017
Removal of silicon from green liquor with low-temperature precausticizing, TAPPI JOURNAL January 2017
Journal articles
Enzymatic preparation of nanocrystalline and microcrystalline cellulose, TAPPI JOURNAL May 2014
Enzymatic preparation of nanocrystalline and microcrystalline cellulose, TAPPI JOURNAL May 2014
Journal articles
Fundamental study on developing wood powder as an additive of paperboard, TAPPI JOURNAL November 2014
Fundamental study on developing wood powder as an additive of paperboard, TAPPI JOURNAL November 2014