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传统的炼铜闪速炉多数采用重油为燃料。石油危机以来,国际能源市场煤炭与石油的价差发生了显著的变化。如1980年9月与1979年4月相比,每桶石油从15.4美元上
Most of the traditional copper smelting furnace using heavy oil as fuel. Since the oil crisis, there has been a marked change in the spread between coal and oil in the international energy market. As of September 1980 compared with April 1979, the price per barrel of oil rose from $ 15.4