Scrap Classification with AI Vision for EAF Melt Shop Yield

By Josh Brook on October 16, 2026

scrap-classification-ai-vision-eaf-melt-shop-yield

A truck of scrap looks much the same from the gate whether it is clean busheling or shredded material carrying motors, wiring and a layer of dirt. The difference shows up later, as lost yield, a copper reading the grade cannot take, or a charge that will not melt flat. Scrap classification with AI vision grades each load as it arrives, flags contaminants and copper risk before the bucket is built, and tells the charge-mix optimizer and the supplier scorecard what was actually delivered. See it on your own yard footage in a short scrap yard demo.

AI VISION · RAW MATERIALS

Know What Is in the Load Before It Reaches the Bucket

iFactory cameras at the gate, tipping floor and crane grade every truck and charge bucket, count copper-bearing items, estimate non-metallics and route the load to the right pile. Grades flow to charge-mix optimization and to each supplier's scorecard.

Grade result · Gate 2 · Load 1147Copper risk
"Load 1147: shredded, copper risk high. Routed to pile C."
H10.12
SH0.71
BU0.17
Copper-bearing items seen14 (motors, wire)
Non-metallics, estimated3.8% of load
Declared on ticketShredded, clean
Scorecard updated: declared vs seen grade logged for supplier 27
WHERE SCRAP FITS

The Largest Cost Item and the Biggest Chemistry Risk

Scrap and other metallics are the biggest single cost of an EAF heat. Industry estimates put them anywhere from about half to three quarters of the cost of producing a tonne of steel, depending on the market and the grade mix. Yet most shops still grade scrap the way they always have: a declared grade on the ticket, a glance from the gate or the crane cab, and a yield figure assumed per grade from past experience. The gap between what was declared and what was delivered is paid for twice, once in yield and once in chemistry. Our yard team can help you measure that gap on your own receipts.

Metallics, commonly half or more of heat costRest
Metallics: scrap, pig iron, DRI and HBI, graded mostly by paperworkRest: power, electrodes, refractories, alloys, labour
Grade mixWhich ISRI-style grades are in the load, and in what shares, versus what the ticket declares.
Size and densityOversize pieces, light fraction and bulk density, which decide how the bucket packs and melts.
ContaminantsCopper motors and wire, coated steel, non-metallics, stainless and alloy pieces.
HazardsSealed containers, cylinders and tanks that must never reach the furnace.
WHAT HIDES IN A LOAD

Six Contaminants, and What Each Does to the Heat

Copper is the one every melt shop fears, because once it is in the bath there is no practical way to remove it. Dilution with cleaner scrap or virgin iron is the only fix used in practice. Above roughly 0.1% copper, steel becomes prone to hot shortness, with surface cracking in hot rolling. Drawing-quality flat products can require less than 0.06%, while rebar tolerates around 0.4%. The other contaminants cost yield, energy, refractory life or safety. Each one has a visual signature that a trained model can learn. Map these to your own grade list in a contamination review.

01
CopperElectric motors, armatures, wiring harnesses and radiators in shredded and obsolete scrap.Vision: counts copper-bearing objects and estimates copper per load
02
Tin and zincGalvanized sheet and tin-plated cans. Zinc goes to dust, tin stays and adds to hot shortness.Vision: coated sheet share in sheet and bundle grades
03
Non-metallicsDirt, concrete, rubber, plastics, wood and fluff that melt into slag or burn off as yield loss.Vision: non-metallic fraction estimate per load and per bucket
04
Oversize and heavy piecesBeams, castings and plate above the size limit cause cave-ins, electrode breaks and slow melting.Vision: oversize detection against the grade's size limit
05
Closed containersDrums, cylinders, tanks and sealed pipe that can hold liquid or pressure and explode in the furnace.Vision: shape-based hazard flag and stop instruction to the crane
06
Stainless and alloyChromium and nickel pieces that push a plain carbon heat off grade and waste high-value material.Vision: surface and shape cues, confirmed by handheld analyser
THE SIGNALS

Six Capture Points, From the Gate to the Spectrometer

AI vision for scrap is a chain of cameras, each with a different job, tied to data the yard already collects. The weighbridge gives weight, the crane gives grab counts, and the melt shop's spectrometer gives the final answer on chemistry. The model links what it saw in a load to what came out of the heats that used it, so its estimates improve with every tap. Check which of these you already have with our support team.

Capture point
Source
What the model reads
Where it goes
Gate and weighbridge
Fixed cameras, scale, ticket data
Declared grade, weight, first view of the load from above
Accept or reject
Tipping floor
Overhead cameras
Grade mix as the load spreads, copper items, non-metallics, hazards
Routing to pile
Crane grab
Camera on the crane or magnet
Grade and size of each grab, grab count per bucket
Bucket build
Bucket top view
Camera over the bucket stand
Layering, fill, oversize pieces, per-bucket composition estimate
Charge-mix optimizer
Radiation portal
Portal monitor, not a camera
Alarm status joined to the load record
Hold and quarantine
Tapped chemistry
Spectrometer and Level 2
Copper, tin, chromium and nickel in the heat, matched to the buckets charged
Model feedback
COPPER RISK BY GRADE

Where Copper Risk Comes From, Grade by Grade

Copper risk is not spread evenly across the grades a yard buys. Clean factory grades such as busheling carry very little. Shredded scrap from end-of-life vehicles and appliances carries the most, because motors and wiring survive the shredder. Dealer bundles are a risk because nobody can see inside them. The pattern below is indicative, and the model learns the real numbers for each of your suppliers. Compare it with your own spectrometer history in a grade review session.

BushelingLow
HMS 1Medium
HMS 2Medium
ShreddedHighest
Dealer bundlesHigh
TurningsMedium

Grades That Reach the Crane Cab, Not a Monthly Report

A grading report at month end cannot change the bucket being built right now. iFactory speaks the result to the yard radio and crane cab, names the pile the load should go to, and lets the supervisor ask why without leaving the floor.

Scrap yard · Supervisor and iFactory
SupervisorWhy is load 1147 flagged? Ticket says clean shredded.
iFactoryThe tipping camera counted 14 copper-bearing items, mostly small motors and harness, and estimates 3.8% non-metallics. That is about twice this supplier's average for shredded.
SupervisorCan we still use it today?
iFactoryYes. I have routed it to pile C for long-product heats, where copper tolerance is higher, and noted the downgrade on supplier 27's scorecard for the claims review.
SCRAP CLASSIFICATION AI VISION EXAMPLE

One Truck, One Flag, One Heat Within Spec

Here is an illustrative morning at a two-furnace shop that buys shredded scrap from several dealers. The times and scores are examples, but the sequence is a common one: a load declared cleaner than it is, a grading camera that sees the difference, and a routing decision that keeps copper out of the heats that cannot take it. Ask our support team to replay a day from your own gate footage.

06:40
Gate
Truck arrivesLoad 1147 from supplier 27, declared clean shredded, 24.6 t on the weighbridge. Radiation portal clear.
06:43
0.74
Tipping floor grades the loadVision reads 71% shredded, 17% busheling, 12% HMS 1, with 14 copper-bearing items and 3.8% non-metallics. Copper risk scores 0.74 and the yard radio announces it.
06:46
Route
Supervisor decidesAccepts the load at the downgraded grade and sends it to pile C, reserved for rebar and merchant bar heats. The ticket and the seen grade are both kept.
07:30
Mix
Charge-mix optimizer rebuilds the recipeFor heat 4471, a rebar grade, the optimizer uses pile C in bucket 2 and raises the busheling share in bucket 1 to hold predicted copper under the grade limit.
09:05
Tap
Heat tapped within specSpectrometer shows copper at 0.27%, inside the rebar limit. The result is matched back to load 1147 and refines the model's estimate for supplier 27's shredded.
End of day
Card
Scorecard and claimSupplier 27's declared-versus-seen gap for the month is updated, and purchasing has photographic evidence for the price adjustment.
SCRAP CLASSIFICATION AI VISION TEMPLATE

A Load Record Worth Keeping

A grading model learns from the link between what came in and what came out, so a load record that stops at the weighbridge ticket limits what it can learn. The fields below turn each delivery into a record that purchasing, the yard and the melt shop can all use. Start capturing them now, even with a phone camera and a spreadsheet, and the data will be ready when the cameras go in. Get a ready-made version in a setup call.

Load and timeLoad ID, gate, arrival time, truck
Supplier and ticketSupplier, declared grade, declared weight
Seen grade mixShares by grade from the tipping camera
ContaminantsCopper items, coated sheet, stainless, oversize
Non-metallicsEstimated share and type
Weight and densityScale weight, estimated bulk density
RoutingPile assigned, accept, downgrade or reject
Heats used inHeat numbers, buckets, tapped chemistry
Claims and feedbackPhotos, downgrade reason, supplier response
COST AND ROI

How to Size the Value of Better Grading

The value of grading has three parts: metallic yield recovered when non-metallics and misgraded loads are caught, off-grade heats avoided when copper is routed correctly, and money recovered from suppliers when downgrades are documented. Yield is usually the largest and the easiest to measure. The example below uses assumed inputs to show the arithmetic. Replace each one with your own figures, and our team can help you complete the case.

Scrap melted per year500,000 t, assumed
Yield lost to non-metallics and misgrading1.0% of scrap, assumed
Steel lost per year500,000 × 1.0% = 5,000 t
Share recovered by grading and routingHalf, assumed
Metallic yield recovered2,500 t of steel per year

Multiply the recovered tonnes by your metallics cost per tonne, then add the value of off-grade heats avoided and supplier claims recovered. Leave the furnace safety benefit of catching closed containers out of the sum, but keep it in the case.

BEST PRACTICES

Vision Works Best Alongside Good Yard Practice

Cameras do not replace a well-run yard. They make a good one measurable. These habits cut contamination on their own and give the model cleaner data to learn from, because loads arrive more consistently and piles stay separate. If you want a second opinion on your yard layout, talk to our raw materials specialists.

At the gate
  • Photograph every load from above before tipping
  • Keep the declared grade and the seen grade side by side
  • Hold any load that trips the radiation portal
  • Reject closed containers and cylinders on sight
In the yard
  • Keep one pile per grade with clear boundaries
  • Separate copper-sensitive and copper-tolerant piles
  • Pick visible copper and stainless before piling
  • Keep piles off bare ground to limit dirt pickup
At the furnace
  • Build buckets to the optimizer's recipe, not habit
  • Match every heat's chemistry back to its buckets
  • Review supplier scorecards monthly with purchasing
  • Feed off-grade heats back to the yard the same day
TURNKEY AI DEPLOYMENT

Cameras, Models and AI Server in One Package

iFactory delivers scrap classification as a turnkey bundle. Industrial cameras are installed at the gate, tipping floor and crane, and a pre-configured NVIDIA AI server ships racked and ready with the vision models, weighbridge and Level 2 connectors and the voice agent pre-loaded. Images are processed on site, so nothing leaves the plant. You rack it, plug in power and Ethernet, and the AI is live. To scope it for your yard, request a turnkey quote.

What's Included
  • Pre-configured NVIDIA AI edge server, racked and ready
  • Industrial cameras for gate, tipping floor, crane and bucket stand
  • Connectors for weighbridge, radiation portal, Level 2 and spectrometer
  • Grading and contamination models trained on your scrap and suppliers
  • Voice alerts to yard radio and crane cab
  • Charge-mix optimization and supplier scorecard, updated per load
  • 24×7 remote monitoring of models and hardware
Live in 6–12 weeks
Wk 1–4
Install and Capture

Cameras and server installed, gate and heat data connected, loads photographed and labelled with your grade list.

Wk 5–8
Train and Shadow

Models trained on your scrap and run silently, with grades checked against inspectors and tapped chemistry.

Wk 9–12
Go-Live and Training

Routing alerts switched on, scorecard thresholds agreed with purchasing, yard and crane crews trained.

HOW iFACTORY FITS

Scrap Grading Built for the Yard and the Melt Shop

iFactory's AI Vision and voice agent are designed for a yard where trucks queue, cranes keep moving and nobody has time to open a dashboard. Our support team can walk you through a pilot plan.

1
Grades every load. Each truck and each bucket gets a grade mix, a contaminant count and a copper risk score within seconds of tipping.
2
Names the reason. Every flag says what was seen, how many, and how far from that supplier's normal.
3
Speaks to the crew. Routing goes to the yard radio and crane cab, and the supervisor can ask why.
4
Closes the loop at tap. Tapped chemistry is matched back to the loads charged, and the supplier scorecard and the model both learn from it.
1000+
Industrial clients running iFactory
99.9%
Platform uptime for round-the-clock yards
6-12 wks
From racked server to live scrap grading
FREQUENTLY ASKED QUESTIONS

What Plant Managers Ask About Scrap Classification with AI Vision

How accurate can a camera be at grading scrap?
Accurate enough to beat a glance from the gate, which is the real comparison. Grade mix, oversize pieces, visible copper items and non-metallic fraction are all things a trained model reads well from overhead images. It cannot see inside a bundle or measure chemistry directly, which is why the model is tied to tapped chemistry and improves supplier by supplier as heats are matched back to loads.
Can it measure copper content in the load?
It estimates it. The model counts copper-bearing objects such as motors, armatures and harnesses, and converts that to a copper risk per load using what previous heats from that supplier actually tapped at. The estimate is used for routing and for the charge-mix optimizer. The spectrometer remains the final measurement, and its result feeds back to the model.
What about dust, rain, night shifts and dirty lenses?
Yard conditions are the main practical limit on any vision system. The deployment uses industrial housings with air purge, lighting at the tipping floor and bucket stand, and image-quality checks that tell the yard when a camera needs cleaning. Models are trained on your own footage across seasons and shifts, not on clean laboratory images.
How does it connect to charge-mix optimization?
Each pile carries a running estimate of grade mix, copper risk, non-metallics and density built from the loads tipped into it. The optimizer uses those estimates, instead of fixed per-grade assumptions, when it builds the recipe for each heat. When a load changes a pile's estimate, the next recipe reflects it.
What goes on the supplier scorecard?
Declared versus seen grade for every load, contaminant counts, non-metallic estimates, downgrades and rejections, and the tapped chemistry of heats that used the supplier's material. Each entry has photographs attached, which gives purchasing evidence for price adjustments and gives good suppliers proof of their quality.
How do we start?
Begin with your grade list and your worst month of off-grade heats. Collect the gate tickets, any photographs and the tapped chemistry for those heats, and we map where the losses came from. Cameras then go in at the gate and tipping floor first, and the model runs in shadow mode for several weeks before any routing alert reaches the crew. Our support team can plan that first phase with you.

Cleaner Charges, Steadier Chemistry, Higher Yield

Put cameras on the gate and the crane, connect your weighbridge and spectrometer, and let iFactory grade every load before it reaches the bucket. The full system is delivered turnkey and goes live in 6 to 12 weeks.

Example daily summary · Scrap yard
Loads gradedEvery truck, every bucket
Copper and hazard flagsEach with photos and reason
Routing decisionsLogged against pile and heat
ScorecardsUpdated per supplier, per load
Every load traceable from gate to tap

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