Process development for biooxidation of refractory gold ore using Ferroplasma acidophilum: A bench-scale case study of gold recovery
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
This study investigates the effects of biooxidation using Ferroplasma acidiphilum on gold recovery from high-grade (HGOS) and low-grade ore samples (LGOS). Pretreatment methods are caaried out in stirred tank reactors and column tests. Results showed that the stirred tank reactor yielded higher recovery rates for key elements, with gold recovery reaching 55 % for HGOS compared to 40 % for LGOS using the column test. Optimal conditions for biooxidation were identified, including aeration flow rates of 1.0–1.5 L/min and agitation speeds of 300–450 rpm, which facilitated effective microbial activity and pyrite dissolution. During cyanidation, gold recovery was highest at a pH of 10.5, with up to 60 % recovery at 8 (g/L) NaCN. However, at pH levels above 11, gold recovery decreased to around 40 % due to competing chemical species and metal hydroxide precipitation. The study also found that extending cyanidation time enhanced gold recovery, with significant increases observed within the first 10 h.
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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