Possible Environmental Impact of Base Metal Mining in MinnesotaMinnesota Department of Natural Resources, Division of Waters, Soils and Minerals, 1972 - Copper ores - 65 pages |
Common terms and phrases
38 & greater 90 E ZONE air pollution Air Pollution Potential air stagnation Anaconda Corporation Appendix areas atmosphere blast furnace Bureau of Mines Citrate Process Cloquet continuous smelting converter copper and nickel cost Cutaway View deposits Duluth Gabbro Duluth Gabbro Complex dump leaching electrolysis elemental sulfur emissions Engineering and Mining environmental EXTRACTION METHODS Figure Flash Smelting Gabbro formation greater 31 greater NE 31 Greenstone belts grinding hydrometallurgical hydrometallurgical process inversion lbs/ton leaching solution Location metal extraction minerals Minimum Mining Journal Minnesota National Weather Service Noranda Northeastern Minnesota NW ZONE operations oxides oxygen pilot plant plume Precipitation produced PYROMETALLURGICAL EXTRACTION recovered Refining reverberatory furnace roaster roasting Sherritt Gordon situ leaching smelter SO₂ stack sulfatization sulfide concentrates sulfur dioxide sulfur is removed sulfur recovery sulfuric acid Surface Wind temperature tion tons tons/day U.S. Bureau Upper Wind Wind Data Collected Wind Roses WORCRA ZONE 5 SW