The environmental impact of iron ore mining, in all its phases of, from excavation to . greater than 60 percent iron. This is done by separating the iron minerals from the valueless minerals, usually by magnetic, gravity, or froth floatation.
Iron IV MSU Department of Geography Michigan State University
Open pit mining for iron ore replaced shaft mining very early on in the history of the . is crushed and the iron separated out through gravity and flotation processes. .. has played a large role in Michigan's once great iron ore mining industry.
Iron ores are rocks and minerals from which metallic iron can be economically extracted. . Iron ore mining methods vary by the type of ore being mined. .. the hematite will sink and the silicate mineral fragments will float and can be removed.