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过去10年间美国高炉从83座减到43座.约减半。可是,通过喷吹煤粉和天然气使现役高炉生产率提高25％。美国Fordham大学产业经济研究所所长最近发表了有关近年美国高炉变迁的调查报告,内容如下: 美国钢铁工业炼铁技术的改善,使高炉生产率提高,并大大有利环保。现役高炉与仅数年前的相比,产量大幅度提高.焦炭消费量大幅度减少,现正支撑美国炼钢用铁料60％。但是炼焦需符合环保标准日趋逼近,将来高炉的稳定存在将不能保证。 到1998年1月1日,美国焦炉总产能的90％需符合大气静化法(1995年实施)的更严格要求.到2003年
The number of blast furnaces in the United States has been reduced from 83 to 43 in the past 10 years. However, by using pulverized coal and natural gas, active blast furnace productivity increased by 25%. The director of the Institute of Industrial Economics at Fordham University in the United States recently published an investigation report on the recent changes in blast furnaces in the United States. The report reads as follows: The improvement of ironmaking technology in the US iron and steel industry will increase the productivity of blast furnaces and greatly contribute to environmental protection. The output of blast furnaces in active use is significantly higher than that of just a few years ago. The consumption of coke is greatly reduced, and it is now supporting 60% of iron materials used in steelmaking in the United States. However, coking needs to comply with environmental protection standards are increasingly approaching, the future existence of a stable blast furnace will not be guaranteed. By January 1, 1998, 90% of the total capacity of coke ovens in the United States must comply with the more stringent requirements of the Atmospheric Static Act (implemented in 1995). By 2003