taconite
Minnesota iron rock
Taconite is a hard, fine-grained sedimentary rock containing iron ore, found primarily in the Lake Superior region of North America.
The iron content is lower than in richer ores, requiring processing to extract usable iron pellets.
Taconite mining became economically viable in the mid-20th century as higher-grade iron deposits were depleted: The Minnesota Iron Range shifted to taconite production in the 1950s.
Magnetic iron ore
- chertFine-grained siliceous stone
- silicaSilicon dioxide compound
- PrecambrianEarliest geological eon
- sedimentaryFormed from deposited material
metamorphic · ironstone · limonite · jasper · ferruginous · strata · deposit · outcrop
Small rounded mass
- indurationAbnormal tissue firmness
- agglomerationCollected mass of parts
- bentoniteAsh-derived absorbent clay
- binderDevice securing loose pages
flux · limestone · firing · sintering · concentrate · fines · iron content · spherical
Act of removing
- blastingExplosive material removal
- drillingHole-making by rotation
- open-pitExcavated from exposed ground
- quarryPit for extracting rock
crushing · concentrator · miner · overburden · stripping · shovel · processing plant · tailings
magnetite
Magnetic iron ore
- chertFine-grained siliceous stone
- silicaSilicon dioxide compound
- PrecambrianEarliest geological eon
sedimentary · metamorphic · ironstone · limonite · jasper · ferruginous · strata · deposit · outcrop · bedrock
pellet
Small rounded mass
- indurationAbnormal tissue firmness
- agglomerationCollected mass of parts
- bentoniteAsh-derived absorbent clay
binder · flux · limestone · firing · sintering · concentrate · fines · iron content · spherical · hardening
extraction
Act of removing
- blastingExplosive material removal
- drillingHole-making by rotation
- open-pitExcavated from exposed ground
quarry · crushing · concentrator · miner · overburden · stripping · shovel · processing plant · tailings · reserves
blast furnace
Ore-to-metal converter
- pig ironUnrefined smelted metal
- steel millAlloy production plant
- smeltingExtracting metal from ore
reduction · coke · slag · molten · ironmaking · feedstock · hot metal · iron ore · industry