Establishments primarily engaged in mining, beneficiating, or otherwise preparing iron ores and manganiferous ores valued chiefly for their iron content. This industry includes production of sinter and other agglomerates except those associated with blast furnace operations. Blast furnaces primarily engaged in producing pig iron from iron ore are classified in Manufacturing, Industry 3312.
- Brown ore mining
- Hematite mining
- Iron agglomerate and pellet production
- Iron ore dressing (beneficiation) plants
- Iron ore mining
- Iron ore, blocked: mining
- Limonite mining
- Magnetite mining
- Manganiferous ore mining, valued chiefly for iron content
- Siderite mining
- Sintering of iron ore at the mine
- Taconite mining