公开(公告)号：US4004920A

公开(公告)日：1977-01-25

申请号：US574804

申请日：1975-05-05

申请人： Richard J. Fruehan

发明人： Richard J. Fruehan

IPC分类号： C21C5/34

CPC分类号： C21C5/34

摘要： In bottom blown processes for the production of low carbon steels (i.e. less than 0.2% C), inert gas flushing employed at an intermediate point of the blow, provides more rapid and more efficient removal of N.sub.2. Thus, inert gas flushing is initiated at a point when the carbon content of the melt is in excess of 0.3%, and preferably in excess of 0.5%. When N.sub.2 is removed to a desired extent, full scale oxygen blowing is resumed to achieve the final degree of decarburization.

摘要翻译： 在生产低碳钢（即小于0.2％C）的底吹方法中，在吹塑中间点使用的惰性气体冲洗提供了更快速和更有效地除去N 2的气体。 因此，当熔体的碳含量超过0.3％，优选超过0.5％时，开始惰性气体冲洗。 当将N2去除到所需的程度时，恢复满刻度的氧气吹扫以达到最终的脱碳程度。