On Fiber Rejection Loss in Flotation Deinking
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Bibliographic record
Abstract
Reducing fiber rejection loss in flotation deinking is very important to conserve natural resources and reduce the cost of secondary fibers in paper recycling. This study examined two aspects of the problem, fiber consistency in the rejection stream and rate of froth (or wet stream) rejection. Flotation experiments were conducted using both nylon and wood fibers in column and commercial bench-scale flotation deinking cells. It was found that increased froth stability resulted in a lower fiber consistency in the wet reject stream. However, it also increased rejection rate of the wet stream. As a result, the total fiber rejection loss was increased with the increase of froth stability. The results obtained suggest that controlling froth stability through reducing frother application and froth rejection are effective ways to reduce fiber yield loss in flotation deinking. This study also experimentally measured water and fiber drainage in fiber suspended froth to explain the effect of froth stability on fiber consistency in the reject stream using froth drainage dynamics. Il est très important de réduire la perte de rejet de fibres dans le désencrage par flottation afin de conserver les ressources naturelles et de réduire le coût des fibres secondaires dans le recyclage du papier. Dans cette étude, on examine deux aspects du problème : la consistance des fibres dans le courant de rejet et le taux de rejet de mousse (ou courant de rejet humide). Des expériences de flottation ont été menées à l'aide de fibres de nylon et de bois dans une colonne et dans une cellule de désencrage par flottation commerciale de taille réduite. On a trouvé que l'augmentation de la stabilité de la mousse diminue la consistance des fibres dans le courant de rejet humide. Toutefois, cela augmente aussi le taux de rejet du courant humide. En conséquence, la perte de rejet de fibres totale augmente avec la stabilité de la mousse. Les résultats obtenus suggèrent que le contrôle de la stabilité de la mousse par réduction de l'application d'agent moussant et du rejet de mousse est un moyen efficace pour réduire la perte de rendement de fibres dans le désencrage par flottation. Dans cette étude, on a également mesuré de manière expérimentale le drainage de l'eau et des fibres dans une suspension de mousse de fibres pour expliquer l'effet de la stabilité de la mousse sur la consistance des fibres dans le courant de rejet à l'aide de la dynamique de drainage de la mousse.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it