平炉采用氧气顶吹以来,熔炼时间虽然大幅度缩短,但前四道工序(补炉、装料,加热,兑铁水)时间变化不大,平均仍在2小时以上,占总熔时的35％左右。为进一步发挥氧气顶吹的生产潜力,鞍钢第二炼钢厂于1974年11月和1975年3月先后进行了两次废钢——氧气法试验,初步取得了一些效果,摸到了一些规律。现将试验情况简介如下: Although the melting time is greatly shortened since the top blowing of the open hearth, the time of the first four steps (make up the furnace, charge, heat, and hot metal) has not changed much, and the average time is still over 2 hours, accounting for 35% about. In order to further develop the production potential of oxygen top blowing, Anshan Iron and Steel No. 2 Steel Works conducted two scrap-oxygen test twice in November 1974 and March 1975, initially achieved some results and touched some laws. Now the experimental situation is as follows: