Degradation mechanisms of magnesia-carbon refractories in radiation heat-affected wall of steel electric arc furnace
Why this work is in the frame
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Bibliographic record
Abstract
This study investigates the mechanisms underlying microstructural deterioration in processed MgO-C refractories from the radiation heat-affected wall of a steel EAF. X-ray tomography and scanning electron microscopy with energy-dispersive spectroscopy were employed to identify the thermally activated chemical, physical, and mechanical degradation phenomena and to evaluate their impact on microstructural evolution during the process. The results reveal that degradation is primarily driven by the development of a porous network surrounding coarse MgO grains (> ∼3 mm), with a strong correlation observed between MgO grain size and damage evolution. Larger grains tend to promote more extensive porous networks, which in turn facilitate oxygen ingress and accelerate carbon oxidation. The pronounced mismatch in thermal expansion coefficients between MgO grains and the carbon matrix contributes to crack formation and grain detachment. These findings provide deeper insight into the failure mechanisms of MgO-C refractories and inform strategies for optimizing refractory design to extend service life and enhance performance.
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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