Metals Emissions from Taconite Ore Processing Facilities,
chemicals (commonly referred to as metals), some of which are among the target chemicals in the air toxics emission inventory. Current emission factors, provided by the U.S. Environmental Protection Agency (EPA), tend to overestimate metals emissions from the taconite ore processing industry.Copper Mining and Processing: Processing of Copper Ores,,B. Processing of Sulfide Ore. Sulfide ores are generally processed using pyrometallurgy, the extraction and purification of metals by processes involving the application of heat. This process uses a series of physical steps and high temperatures to extract and purify copper from copper sulfide ores, in four basic steps: 1) froth flotation, 2,USGS Minerals Information: Map Data,The information presented in the three data documents represents basic data about the 1,965 mines and processing plants shown on the map. Included in each of the three documents is company name, site name, State, county, commodity, and whether the location is a mine, processing plant, or both for each of the locations shown on the map.