应用能够强化冶炼生产,明显地减少燃料动力消耗,提高原料综合利用率和显著降低环境污染的自热熔炼法是苏联重有色金属生产发展的主要方向。铜冶炼生产中经营费、投资费和劳务费的结构如下,％: The application of self-heating melting method that can strengthen smelting production, obviously reduce fuel consumption, improve the comprehensive utilization of raw materials and significantly reduce environmental pollution are the main directions for the development of heavy non-ferrous metal production in the Soviet Union. The structure of operating expenses, investment expenses and service fees in the production of copper smelting is as follows:%