全世界有40%的钢铁来自废钢铁。20年前,一般采用平炉炼钢。平炉对废钢铁比例限制较小。目前已普及了氧气炼钢,吹炼效果良好。但废钢铁比例较小。废钢由电炉处理,成本较高。底吹虽有不少优点,但废钢铁比例只有25%,要比顶吹转炉少3%。因此在底吹转炉中提高废钢铁比例,是个重大的课题。为此,4年前,klockner公司对下述三个问题进行了 Forty percent of the world’s steel comes from scrap iron. Twenty years ago, open hearth steelmaking was generally used. Open hearth ratio of scrap steel smaller restrictions. Oxygen steel has been popularized, the blowing effect is good. However, a smaller proportion of scrap steel. Scrap by electric furnace processing, high cost. Although the end of blowing a lot of advantages, but only 25% of scrap steel than the top blown converter less 3%. Therefore, it is a major issue to increase the scrap steel ratio in the BOF. To this end, 4 years ago, klockner company conducted the following three questions