Iron Ore Fines
Finely crushed iron ore, under roughly 6mm, that must be sintered or pelletized before a blast furnace can use it — the largest single form of iron ore in global seaborne trade.
Covered in 1 MetalsCost.com News Intelligence article, most recently on August 8, 2026.
Overview
Iron ore fines are the finer particles of mined ore — generally under 6 millimetres — that come off the same screening process that separates out coarser lump ore. Fines make up the larger share of most ore bodies and, correspondingly, the larger share of global iron ore production and trade, which is why the standard international price benchmarks that traders and analysts quote, typically expressed as a percentage iron content delivered to a Chinese port, are usually fines prices rather than lump prices.
Why Fines Need Extra Processing
Unlike lump ore, fines can't be charged directly into a blast furnace — their small particle size would restrict airflow through the furnace and disrupt the smelting process. Steelmakers first need to agglomerate fines into larger clumps, either through sintering, which heats and partially fuses the fines with flux material into a porous cake, or pelletizing, which rolls the fines with a binder into small, uniform balls that are then hardened by firing. That extra step adds cost and energy use compared with lump ore, which is the main reason fines typically sell at a discount to lump of similar iron content, even though the underlying ore is often extracted from the very same mine.
Role in Global Trade
Because fines dominate the physical volume of iron ore that gets mined and shipped, they're also what most seaborne trade actually consists of, and what most iron ore price indices are built around. A miner's monthly fines price, alongside its lump price, functions as the anchor that domestic steelmakers and traders reference for contract negotiations — which is exactly why a price cut on fines specifically, even a modest one, tends to draw attention across the wider steel and construction supply chain.
