taconite

Taconite is a low-grade iron ore that is primarily composed of magnetite and hematite minerals. It is found in large deposits in the Mesabi Range of Minnesota, United States, and is a significant source of iron for the global steel industry. The term "taconite" is derived from the word "taconite," which is a Native American word meaning "rock."

Taconite ore is typically mined using open-pit methods due to its low grade and the large volume of material that needs to be processed. The ore is crushed and ground into a fine powder, then concentrated using magnetic separation techniques. The concentrated ore, known as taconite pellets, is then heated in a furnace to remove moisture and bind the particles together, creating a solid, porous material that is suitable for use in steelmaking.

Taconite is valued for its high iron content and low impurities, making it an efficient and cost-effective source of iron for the steel industry. The mining and processing of taconite have a significant environmental impact, including habitat destruction, water pollution, and air pollution. However, efforts are being made to mitigate these impacts and improve the sustainability of taconite mining and processing.