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CSN Mineração SA is a Brazilian mining company engaged in the extraction, processing, and export of iron ore. It operates mines in the state of Minas Gerais and serves customers in the steel, construction, and infrastructure sectors. The company is a subsidiary of Companhia Siderúrgica Nacional and manages logistics through rail and port assets. The company is headquartered in São Paulo, Brazil, and its shares are listed on the B3.