Iron - Department of EnergyMagnetite - Magnetite (Fe3O4) forms magnetic black iron ore. There are large . of the mines to the Great Lakes, which offer low-cost transportation. No U.S. taconite ... results of the mine model and equipment cost guide. Table 4-3 shows the.mining equipment iron ore cost,iron mining part IV - MSU Department of Geography - Michigan State .Open pit mining for iron ore replaced shaft mining very early on in the history of . In other areas, abandoned mining equipment stands as a reminder of past glory. . The cost of underground mining became more prohibitive, and the owners of.
mining equipment iron ore cost