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Detection · Mining & Metals

Slag detection: Datasets & Models

Computer vision for detecting slag in molten metal streams and pour operations during steelmaking and casting. Flags slag carryover in real time so operators can catch it before it contaminates downstream product.

Slag detection example
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Slag detection

This slag detection workflow applies object detection to camera frames from furnace, converter, ladle, and casting operations, locating slag as it moves through tapping streams, pours, and tundish flows. It takes images or video frames as input and separates molten metal from slag using texture, color, and flow cues, so operators can catch slag carryover before it reaches downstream product.

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Detecting classes:

Why automate slag detection

Slag carryover during tapping and casting degrades metal quality, damages refractory lining, and forces expensive reprocessing or scrap. The manual alternative relies on operators watching bright, high-temperature pour streams for the moment slag breaks through, which is inconsistent across shifts and dangerous to observe up close. Automating slag detection with computer vision gives a consistent, tireless second set of eyes on every pour, catching carryover the instant it starts and enabling faster slag-stop response. For mining and metals operations, that translates directly into higher yield, better metallurgical consistency, and reduced refractory wear.

Key benefits

Automated slag detection improves pour consistency, reduces contamination-driven rework, and extends refractory life by enabling earlier cutoff. It works with the optical and thermal cameras already mounted on furnaces, ladles, and casting lines, so there is no need to re-engineer the pour floor. Built on RF-DETR, the detection model can scale from a single tapping station to every casting line in the plant while maintaining reliable performance in challenging high-glare, high-heat conditions.

How to use it

  1. Upload an image: Drop any photo into the widget above to try slag detection for free, right on this page.
  2. Preview instant results: The model detects slag, molten metal stream, ladle, tundish, pour spout within seconds and returns an annotated image with structured predictions, so you can immediately see how well it works. Adjust the detection classes and re-run until the results fit your scenario.
  3. Like what you see?: With a free Roboflow account, you can deploy this workflow with the Serverless Cloud API, customize it in your workspace, or train RF-DETR on your own images for production accuracy.
  4. Get started for free: No code or training data required to begin: upload, review the results, and make it part of your stack in a single click.
Recommended model

Recommended model for slag detection

RF-DETR is state of the art for real-time object detection, instance segmentation, and keypoint detection, with higher accuracy and lower latency than comparable models, and it's Apache 2.0 licensed. When you're ready to build a production model for slag detection, fine-tune it on your own labeled images, then deploy to a Serverless Cloud API endpoint.

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