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- Reduction roasting of nonmagnetic taconites with automobile scrap
- Selective oxidation of automobile scrap
- Reduction roasting and beneficiation of a hematitic-goethitic taconite
- Beneficiation of a hematitic taconite by reduction roasting, magnetic separation, and flotation
- Beneficiation of a western Mesabi nonmagnetic taconite after reduction roasting with lignite
- Low-rank coals and waste materials for reduction roasting and metallization of iron oxides