The company also raised its C1 cash cost projection to $25-$26 per ton.
CSN Mineração altered its iron ore production estimates and C1 cash cost projections on Tuesday, September 29, 2026. The revision followed a temporary reduction in ore processing activities at its dry processing plant within the Pires Complex, located in Ouro Preto, Minas Gerais.
The subsidiary of Companhia Siderúrgica Nacional now expects to produce between 39 million and 41 million metric tons of iron ore in 2026. This represents a cut from its previous projection of 45 million to 47 million metric tons.
The miner also increased its C1 cash cost projection, which measures the direct cost of producing a ton of ore, to a range of $25 to $26. Its prior target stood between $22 and $23.50.
According to CSN Mineração, the decision to curb activities at the Ouro Preto plant stems from tighter market conditions and rising freight costs. The company stated that the measure can be reversed at any time without major consequences if market conditions begin to offer better margins for this type of ore.
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