Flocculation‐assisted dewatering of fluid fine tailings using a volute screw press
Bibliographic record
Abstract
Abstract A flocculation‐assisted process to continuously dewater oil sands fluid fine tailings using a volute screw press was developed. An anionic‐cationic flocculant scheme was applied first to flocculate essentially all suspended solids in the fluid fine tailings. The concept of elastic and plastic deformations for metallic solids was extended and successfully applied to describing compression and subsequent water release characteristics of the flocculated sediments. The newly‐developed “controlled vertical strain test” (CVST) provided a good measure of the impact of flocculants on the compressive dewaterability of flocculated sediments. A new empirical parameter named “compression dewatering index” (CDI) was obtained from the sediment compression response curve of the CVST. Field tests at Canadian Natural Resources Limited with a prototype volute screw press showed a linear correlation between the CDI and the filter cake dry solids content produced by the volute screw press. Under process conditions in this study, a stackable cake containing 55–60 wt% solids at a 5–7 kg dry solids/h production rate was achieved by applying the volute screw press to the flocculated fluid fine tailings. The novel findings from this study could serve as a useful theoretical framework for future research on flocculation‐assisted dewatering of fluid fine tailings by elevated external mechanical forces, as encountered in centrifuge and filtration.
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How this classification was reachedexpand
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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".