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1973年以来,石油与煤涨价,世界钢铁生产增长速度减缓,近三年除了苏联生铁年产量上亿吨以外,日本与美国停留在8000万吨左右水平,详见表1.高炉炼铁技术围绕节能有所发展.国内、外高炉进行低燃料比操作,冶炼低硅、低硫生铁.1980年我国生铁产量3805万吨,占世界第四位.在技术方面,喷吹煤粉有独到之处.上、下部调剂技术有新的发展,强化冶炼也有传统,但是精料、高压炉顶、高风温等技术落后于国外.1981年日本高炉利用系数是1.78,燃料比481kg/t.1980年国内重点企业高炉利用系数是1.555,燃料比585kg/t,差距不小.
Since 1973, oil and coal prices, the world steel production growth slowed down in recent three years in addition to the Soviet Union pig iron annual output of hundreds of millions of tons, Japan and the United States remain at 80 million tons level, as shown in Table 1. Blast furnace ironmaking technology Around the energy-saving development of domestic and foreign blast furnace for low fuel ratio operation, smelting low-silicon, low-sulfur pig iron in 1980. China’s pig iron production was 38.05 million tons, accounting for the fourth in the world in the technical aspects of pulverized coal injection unique At the upper and lower swap technology has new developments, there are also traditional smelting, but the fine material, high pressure roof, high wind temperature and other technologies lag behind in foreign countries .1981 Japan blast furnace utilization factor is 1.78, fuel ratio 481kg / t.1980 Domestic key enterprises blast furnace utilization factor is 1.555, fuel ratio 585kg / t, the gap is not small.