U.S. exports of Roasted Iron Pyrites (Pyrite Cinders) (SITC 28140) totaled $10K in August 2026, exported to 1 country.
Last updated: August 2026 dataRoasted iron pyrites — commonly called pyrite cinders — are the iron-oxide residue left after sulfur has been driven off from iron pyrite (FeS₂) during sulfuric acid production. The material is an intermediate industrial feedstock rather than a primary iron ore, and its trade value depends on iron content, residual sulfur levels, and the presence of trace metals such as copper, gold, or zinc that may make it worth further processing. Importers typically source pyrite cinders for use as a supplementary iron feed in cement kilns or as a raw material for secondary metal recovery, and chemical analysis certificates are standard commercial practice for each lot.
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Iron content (expressed as Fe or Fe₂O₃), residual sulfur percentage, moisture content, and the concentrations of recoverable trace metals — particularly copper, gold, and zinc — are the primary specification points. Cement kiln operators focus on iron content and sulfur limits, while secondary smelters may prioritize the precious or base metal credit value. Buyers routinely require third-party assay certificates before accepting a shipment.
Roasted iron pyrites are a byproduct of sulfuric acid manufacturing — the pyrite has been thermally oxidized to remove sulfur — rather than a naturally mined iron ore. This processing history places them in a separate SITC heading from iron ore and concentrates. Commercially, pyrite cinders are generally lower-grade and more variable in composition than purpose-mined iron ore, and they are priced accordingly as a secondary or supplementary iron source.
Basic heading 210 of 239 in section 2
Basic heading 28140 · $10K of $7.8B
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Exports · August 2026
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ImportsExports
Imports
—YoY · free account
Exports
$10KYoY · free account
Low of 1 reported month · imports
Low · free accountFewer than 6 of the last 12 months reported trade, or the latest month was under $500K; the trend chart is not shown for thin series.
Through August 2026 · imports 1 of 12 months reported, exports 6 of 12 months reported. Source: U.S. Census Bureau.