专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明公开

EP1403387A1 METHOD FOR DECARBONIZATION REFINING OF CHROMIUM−CONTAINING MOLTEN STEEL 审中-公开
标题翻译： VERFAHREN ZUM ENTKOHLUNGSFRISCHEN VON CHROMHALTIGEMSCHMELZFLÜSSIGEMSTAHL
公开(公告)号：EP1403387A1
公开(公告)日：2004-03-31
申请号：EP02741380.6
申请日：2002-07-01
申请人： NIPPON STEEL CORPORATION
发明人： NAKAO, Ryuji , TANAKA, Tomoaki , IGARASHI, Masao , YOSHINO, Koichiro
IPC分类号： C21C7/00 , C21C7/068 , C21C7/072 , C21C7/10
CPC分类号： C21C7/0685 , C21B5/001 , C21C5/005 , C21C5/4673 , C21C7/072 , C21C7/10 , C21C2300/06 , Y02P10/286 , Y10S706/904
摘要： The present invention: solves the problems of hitherto disclosed technologies, such as insufficient suppression of the oxidation loss of [Cr] and the excessive erosion of refractories, in the decarburization-refining of chromium-contained molten steel under a normal or reduced pressure; and is characterized by: determining, in sequence; a molten steel temperature during the refining through actual measurement or computation from a molten steel temperature before the refining and refining conditions; [C] and [Cr] concentrations during the refining through actual measurement or computation from molten steel components before the refining and refining conditions; a CO partial pressure P CO in an atmosphere during the refining from the total pressure P of the atmosphere, an oxygen gas supply rate and an inert gas supply rate; a Hilty's equilibrium temperature T H from said [C] and [Cr] concentrations and P CO ; the difference ΔT between said molten steel temperature during the refining and said Hilty's equilibrium temperature T H : and controlling the refining conditions so that said ΔT is equal to a prescribed value or higher.
摘要翻译：在大气压或减压下对含铬钢水进行脱碳精炼包括通过实际测量或通过在精炼和精制条件之前从钢水的温度计算钢水的温度，确定[C ]和[Cr]浓度在精炼期间通过实际测量或通过在精炼和精炼条件之前的钢水组成的计算来确定在大气中的CO（PCO）在大气中的分压，从大气的总压力和氧气和惰性气体的进料速率，基于上述[C]和[Cr]浓度和PCO确定钢水的Hilty平衡温度，确定熔融的上述温度的差（ΔT）精炼期间的钢和Hilty平衡温度，并控制精炼条件，以使Delta T具有预先确定的 ed值或更多。

IPRDB

热门服务

关于我们

友情链接

联系方式