Possible Environmental Impact of Base Metal Mining in MinnesotaMinnesota Department of Natural Resources, Division of Waters, Soils and Minerals, 1972 - Copper ores - 65 pages |
Contents
SCOPE AND PURPOSE | 1 |
AIR POLLUTION PROBLEMS ASSOCIATED WITH PYROMETALLURGICAL | 7 |
UNDERGROUND MINING METHODS | 13 |
2 other sections not shown
Common terms and phrases
38 & greater 90 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 copper sulfide costs 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 gases greater 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 Smelting Furnace SO₂ stack sulfatization sulfide concentrates sulfur dioxide sulfur is removed sulfur recovery sulfuric acid Surface Wind temperature tion tons U.S. Bureau Upper Wind Wind Data Collected Wind Roses WORCRA ZONE 5 SW ZONE 6 ZONE