日本新日铁公司八幡厂在其LD-OB顶底吹转炉上采用了一种废钢预热的新方法,在铬系不锈钢的生产中取得了显著的效果。该厂LD-OB转炉原先是采用底吹环缝喷嘴的外管吹煤油,内管与顶枪吹纯氧的方法对废钢进行加热的;但这种方法往往会造成废钢料的吹损与氧化损失。为了提高金属收得率,该广研制了一种新的废钢预热方法,即用氮气稀释顶枪与底吹喷嘴中喷出的氧气,降低炉内温度,防止废钢料熔融。同时,每隔数分钟将转炉摇动一次,使废钢料在炉内均匀受热。采用这些措施后,废钢料的吹损与 Nippon Nippon Steel’s Yawata plant adopted a new method of scrap preheating on its LD-OB top-bottom converter that achieved remarkable results in the production of chromium-based stainless steel. The plant LD-OB converter was originally used to blow the end of the mouth blowing nozzle kerosene, the inner tube and the top gun blowing pure oxygen method of scrap heating; However, this method will often result in scrap material blowing and oxidation loss. In order to improve the metal yield, the wide developed a new scrap preheating method, that is, nitrogen and the bottom blowing nozzle to dilute the spray nozzle oxygen to reduce the temperature inside the furnace to prevent scrap melting. At the same time, the converter is shaken once every few minutes to allow the scrap material to be uniformly heated in the furnace. After using these measures, the scrap material is blown away