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超高功率(UHP)电炉炼钢,在国外已有20余年历史和成熟经验,近年来才在我国引起重视。UHP电炉在我国发展取决于下列几个问题。1.废钢。一个国家的年废钢产量大约为15～20年前的钢产量。我国在1966年的钢产量为1532万t。1986年的电炉钢产量为1100万t。在废钢市场开放后,目前废钢供应已松动,估计有100万t以上的富裕。进口废钢是一个价格合适的问题。发展直接还原铁也是一条途径。2.电极。好些工业国家能生产24时80kA的优质电极,而我国目前生产的500mm35kA的电极折断频频繁。一些钢厂依赖进口。国内生产石墨电极的关键是原材料一针状石油焦的供应。3.供电。到2000年我国发电量将增至400%,
Ultra-high-power (UHP) electric furnace steelmaking has more than 20 years of history and mature experience in foreign countries. It has attracted attention in China in recent years. UHP furnace development in our country depends on the following issues. 1. Scrap steel. A country’s annual scrap production is about 15 to 20 years ago. China’s steel production in 1966 was 15.32 million tons. In 1986, the output of electric furnace steel was 11 million tons. After the scrap market opened up, the current scrap supply has been loosened and it is estimated that there will be more than 1 million tons of affluence. Import scrap is a price issue. The development of direct reduced iron is also a route. 2. Electrode. Many industrial countries can produce high-quality electrodes at 24 hours and 80 kA, but the 500mm35kA electrodes currently produced in China are frequently broken. Some steel mills rely on imports. The key to the domestic production of graphite electrodes is the supply of needle-like petroleum coke. 3. Power supply. By the year 2000, China’s electricity generation will increase to 400%.