A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Heat Extraction from Mining Waste Piles
Significant heat generation occurs in mining waste piles due to the bacterially mediated, highly exothermic oxidation reactions of pyrite minerals commonly present in waste rocks. An opportunity exists to extract the heat from mining waste piles for beneficial use as an alternative energy source while limiting acid producing reactions within a waste pile. Two approaches are outlined to establish available thermal energy: extracting the excess heat above baseline (i.e., ambient) thermal equilibrium conditions and extracting the excess heat above 0°C (i.e., temperature threshold where microbial populations become relatively inactive). The differences between the waste temperatures and the target temperatures were quantified and then multiplied with the heat capacity of the wastes to determine extractable heat energy. Example analyses using data from four sites in different climatic regions indicated that up to 76.0 and 90.3 MJ/m3 of heat energy were available above baseline equilibrium and 0°C target temperature conditions, respectively.
Heat Extraction from Mining Waste Piles
Significant heat generation occurs in mining waste piles due to the bacterially mediated, highly exothermic oxidation reactions of pyrite minerals commonly present in waste rocks. An opportunity exists to extract the heat from mining waste piles for beneficial use as an alternative energy source while limiting acid producing reactions within a waste pile. Two approaches are outlined to establish available thermal energy: extracting the excess heat above baseline (i.e., ambient) thermal equilibrium conditions and extracting the excess heat above 0°C (i.e., temperature threshold where microbial populations become relatively inactive). The differences between the waste temperatures and the target temperatures were quantified and then multiplied with the heat capacity of the wastes to determine extractable heat energy. Example analyses using data from four sites in different climatic regions indicated that up to 76.0 and 90.3 MJ/m3 of heat energy were available above baseline equilibrium and 0°C target temperature conditions, respectively.
Heat Extraction from Mining Waste Piles
Yeşiller, Nazli (author) / Hanson, James L. (author) / Yee, Emma H. (author) / Kopp, Kevin B. (author)
Geo-Chicago 2016 ; 2016 ; Chicago, Illinois
Geo-Chicago 2016 ; 311-320
2016-08-08
Conference paper
Electronic Resource
English
Heat Extraction from Mining Waste Piles
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