Battery recycling: the black-mass flowsheet family in brief

Battery recycling is the newest hydrometallurgical family, and it is striking precisely because it composes from the same mechanism set as the older commodities — a new feed, not a new chemistry. This page assembles it in brief from the published literature, naming each mechanism rather than re-teaching it.

The flowsheet in one line

Shred and process spent cells to a metal-rich black mass, leach the black mass into solution, separate and purify the metals, and precipitate them as battery-precursor salts: leach–purify–precipitate, fed by black mass instead of ore.

What each stage is doing

The feed is black mass — the fine, metal-rich fraction recovered after spent lithium-ion cells are discharged, shredded and physically sorted — carrying nickel, cobalt, manganese, lithium and copper. The leach is acid tank leaching, the dissolution-and-residence-time mechanisms of topics 4.1 and 4.3, dissolving the metals (commonly in sulfuric acid with a reductant). Purification and separation uses the Module 6 mechanisms: solvent extraction (topic 6.6) and ion exchange (topic 6.7) to split the closely-related metals, and precipitation (topic 6.2) to reject impurities — the same toolkit that separates nickel from cobalt in a primary circuit. Recovery is the precipitated-products step of topic 7.4: the purified metals are precipitated as the sulfate and hydroxide precursor salts that feed new cathode manufacture, with lithium recovered as carbonate.

The defining numbers

The black-mass leach reagent demand lands on the leach reagent consumption calculator below; the nickel and manganese sulfate hubs carry the property data for the dissolved metals and the precursor products. The separation steps are read on their own mechanisms — the SX O/A ratio and the IX cycle — rather than a single committed calculation, so the page leans on the cross-links into the Module 6 topics.

Where it differs from the others

Battery recycling is the family whose feed is a manufactured product, not an ore, so its grade is high and its value is a basket of metals rather than one. Otherwise it is the clearest demonstration of the path’s thesis: once the mechanisms are learned, a genuinely new flowsheet is read by naming which ones it composes — here leaching, solvent extraction, ion exchange, precipitation and precipitated-product recovery.