Zinc-Bearing Ash and Residues (Excluding Hard Zinc Spelter)

Zinc dross, zinc skimmings, and other ash or residues containing mainly zinc — but not qualifying as hard zinc spelter — are recovered secondary materials widely used by zinc refiners and recyclers. The US schedule subdivides this heading into zinc dross and skimmings (2620193000), lead-bearing zinc residues (2620196020), and a general basket line (2620190000), reflecting the importance of co-metal content in valuation and downstream processing. Canada and Mexico are the leading suppliers, with Japan, China, and Taiwan also contributing meaningfully to US import volumes.