Definitions for "Taconite"
Keywords:  chert, magnetite, iron, ahdos, mesabi
A highly abrasive iron ore.
a variety of chert containing magnetite and hematite; mined as a low-grade iron ore
Natural mineral containing less than 30% iron. It is the primary ore used in blast furnaces. Domestic supplies of iron-rich ores (greater than 50% iron) were largely depleted in the 1940s, so integrated steel companies now process the lower-grade taconite to make it useful.