Compréhension des mécanismes de déstabilisation des substances dissoutes et colloïdales contenues dans les mélanges de pâtes à papier recyclée et mécanique : proposition de solutions pour limiter le nombre de casses stickies

Abstract : During the manufacturing of paper pulp, deinked and mechanical, dissolved and colloidal substances are released into the waters of the process. These can become unstable under certain conditions and form sticky agglomerates, called "stickies". The presence of these agglomerates generates disturbances in the formation of the sheet on the paper machine, including breaks. The works presented in this thesis show the impact of the level of extractible, obtained in an automated manner through the establishment of a sensor, on the occurrence of the breaks of stickies origin. On the other hand, the ageing of deinked pulp has been identified as a cause of physico-chemical changes of the pulp, leading to the destabilization of dissolved and colloidal substances from mechanical and deinked pulps during the mixing phase. Finally, solutions have been proposed to limit the phenomenon of agglomeration of dissolved and colloidal substances and reduce the number of breaks on the machine
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Cédric Cael. Compréhension des mécanismes de déstabilisation des substances dissoutes et colloïdales contenues dans les mélanges de pâtes à papier recyclée et mécanique : proposition de solutions pour limiter le nombre de casses stickies. Autre. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0068⟩. ⟨tel-01749233⟩

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