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葫芦岛锌厂从1986年开始,连续不断地进行大规模技术改造。到1992年,锌的生产能力达到20万吨,硫酸的生产能力达到45万吨,由一个年产6万吨的中型企业变成特大型企业,实现了一厂变三厂的高速发展。1993年,又建成了3万吨能力的股份制电解锌厂、2万吨粗铜能力的中外合资铜厂、发电量1.44亿度的中型发电厂。同时,对旧硫酸系统进行了改造,全部实现了“两转两吸”先进工艺,统称为”三厂一改造”工程。结束了该厂单一品种生产的历史,综合利用水平也有了长足发展,企业参与市场竞争的能力大大增强,锌产量完成202517吨,比上年提高
Huludao zinc plant from 1986 onwards, continuous large-scale technological transformation. By 1992, zinc production capacity reached 200,000 tons, sulfuric acid production capacity reached 450,000 tons, from an annual output of 60,000 tons of medium-sized enterprises into large enterprises, to achieve a plant to change the rapid development of three plants. In 1993, it also built a 30,000-ton joint-stock electrolytic zinc plant, a 20,000-ton blister copper joint-stock copper plant and a 144 million-kilowatt medium-sized power plant. At the same time, the old sulfuric acid system has been transformed, all realized the “two-switch two suction” advanced technology, collectively referred to as the “three plants a transformation” project. The end of the plant a single variety of production history, the comprehensive utilization has also made considerable development, enterprises greatly enhance the ability to participate in market competition, zinc production to complete 202,517 tons, higher than the previous year