How do you calculate battery recycling process yield loss?

Divide lost or residue mass by incoming process mass. With 620 kg of residue from 11,200 kg of incoming feed, that is 620 / 11,200 = 5.54% yield loss.

What is a good process yield loss for battery recycling?

It depends on the step and chemistry, but mechanical pre-processing targets are often in the low single digits. In the example, a 4% target against an actual 5.54% loss leaves a 1.54-point gap that needs closing.

What does the loss gap to limit mean?

It is target minus actual. Here 4% - 5.54% = -1.54 points; the negative sign means you are over your target by 1.54 points, so the process is out of spec rather than within it.

Why use mass yield loss instead of value loss?

Mass loss is fast, directly measurable on a scale, and good for process control. But for financial decisions, weight it by the metal content of the residue, since cobalt-rich dust costs far more per kilogram than inert losses.

How do I reduce process yield loss?

Localize where mass disappears — fines below screen cutoffs, fugitive dust capture, carryover to the wrong separation fraction. Tighter classification, dust recovery, and reclaiming the magnetic/eddy-current reject streams typically recover the most.

Yield loss vs recovery rate — are they the same?

They are complements. A 5.54% yield loss corresponds to roughly a 94.46% mass yield. Recovery rate is usually reported per target metal, while this metric is total mass through the step.

Battery Recycling & Materials Recovery calculator

Battery Recycling Process Yield Loss Calculator

Process Yield Loss tells a battery recycler what fraction of incoming feed mass ends up as residue, dust, slag, or off-spec material instead of recovered black mass and metals. Recovery engineers and plant managers track it across crushing, shredding, and separation because every lost point of mass is lost nickel, cobalt, lithium, and copper value. It matters because the economics of hydromet and pyromet recovery are thin — a couple of points of avoidable loss on a 11-tonne batch is real money walking out as waste. Comparing measured loss against a target maximum turns a vague 'we lose some' into an auditable gap.

What this calculator does

Calculate process yield loss from lost or residue mass, incoming process mass, and the target maximum loss rate.
a recycling or hydrometallurgy team needs to measure mass lost from a process step and decide whether recovery performance needs investigation
It computes process yield loss as residue mass divided by incoming process mass, then reports the gap between that loss and your target maximum.

Formula used

Process yield loss = lost or residue mass ÷ incoming process mass
Loss gap to limit = target maximum yield loss - calculated process yield loss

Inputs explained

Lost or residue mass:
Incoming process mass:
Target maximum yield loss:

How to use the result

Use it after a run or shift to check whether mechanical and separation losses are within spec, and to localize which step is bleeding recoverable mass.
Mass-based loss treats all lost kilograms equally, so it can understate the financial hit when the residue is rich in high-value cobalt or lithium versus inert binder.

Current U.S. benchmarks

The producer price index for copper and brass mill shapes stands at 559.593 (BLS, May 2026), up 76.8% from a year earlier. Quotes priced off last quarter's material cost miss this move. Global copper trades at $13,484 per tonne (IMF via FRED, May 2026).
The U.S. has 5,397 electrical equipment and appliances establishments employing about 369,437 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate battery recycling process yield loss? Divide lost or residue mass by incoming process mass. With 620 kg of residue from 11,200 kg of incoming feed, that is 620 / 11,200 = 5.54% yield loss.
What is a good process yield loss for battery recycling? It depends on the step and chemistry, but mechanical pre-processing targets are often in the low single digits. In the example, a 4% target against an actual 5.54% loss leaves a 1.54-point gap that needs closing.
What does the loss gap to limit mean? It is target minus actual. Here 4% - 5.54% = -1.54 points; the negative sign means you are over your target by 1.54 points, so the process is out of spec rather than within it.
Why use mass yield loss instead of value loss? Mass loss is fast, directly measurable on a scale, and good for process control. But for financial decisions, weight it by the metal content of the residue, since cobalt-rich dust costs far more per kilogram than inert losses.
How do I reduce process yield loss? Localize where mass disappears — fines below screen cutoffs, fugitive dust capture, carryover to the wrong separation fraction. Tighter classification, dust recovery, and reclaiming the magnetic/eddy-current reject streams typically recover the most.

Last reviewed 2026-05-12.