表22003年高炉和转炉按炉容大小分类的利用系数从20世纪90年代以来,冶金工业以研发和应用共性技术(包括资源的精料技术,工艺的连铸、喷煤、连轧技术,节能降耗和环保治理技术以及钢铁产品适应市场的升级换代和涂镀层等深加工技术),使科技进步的贡献率(降低成本和提高利润)达到63 Table 22 Utilization Factors for Classification of Blast Furnaces and Converters by Furnace Capacity Since the 1990s, the metallurgical industry has focused on research and development and application of common technologies (including concentrate technology for resources, continuous casting for technology, coal injection, continuous rolling, energy saving Consumption reduction and environmental protection technologies, as well as upgrading of steel products to the market and deep processing technologies such as coating), contributing to the contribution of scientific and technological progress (reducing costs and increasing profits) to 63