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采矿一切作业活动都要耗能。选矿也要耗能。最后,精矿或球团矿通过熔炼炉或高炉冶炼也需要大量耗能。一九八○年美国国内能耗总量为70—80,000千兆(10~(15))B.t.u.(英热单位)。进口能源占能耗总量的15％～20％。美国的矿物工业(指采选工业)占全国能耗总量的3％。原生金属工业,如钢铁工业、铜冶炼和精炼工业占制造业中能耗量的20％或全国能耗总量的4％。
All mining activities require energy. Mineral processing also consume energy. Finally, concentrates or pellets that require smelting through smelting furnaces or blast furnaces also consume a significant amount of energy. The total domestic energy consumption in the United States in 1980 was 70-80,000 gigabytes (10 to 15) B.t.u. (British thermal unit). Imported energy accounts for 15% to 20% of the total energy consumption. The United States mineral industry (referring to the mining industry) accounts for 3% of the total energy consumption. Primary metals industries, such as the steel industry, copper smelting and refining industries, account for 20% of manufacturing energy consumption or 4% of national energy consumption.