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1. 发明申请

WO2013012039A9 METHOD FOR SMELTING MOLTEN PIG IRON 审中-公开
标题翻译：熔化铁皮的方法
公开(公告)号：WO2013012039A9
公开(公告)日：2013-11-14
申请号：PCT/JP2012068349
申请日：2012-07-19
申请人： JFE STEEL CORP , IKENO SHIZUHIKO , IWAKI YOZO , SASAKI NAOTAKA , ISHII TAKESHI , UCHIDA YUICHI , NISHIKORI MASANORI
发明人： IKENO SHIZUHIKO , IWAKI YOZO , SASAKI NAOTAKA , ISHII TAKESHI , UCHIDA YUICHI , NISHIKORI MASANORI
IPC分类号： C21C1/04 , C21C1/02 , C21C5/28 , C21C5/36
CPC分类号： C21C7/04 , C21C1/02 , C21C1/025 , C21C1/04 , C21C5/34 , C21C7/064 , C21C2005/366
摘要： This method for smelting molten pig iron involves: introducing molten pig iron and a cold iron source into a converter smelting container; melting the cold iron source and subjecting the molten pig iron to a desilication treatment by supplying, together with an oxygen source, an auxiliary material containing CaO as a main component; then, as intermediate de-slagging, de-slagging at least a portion of the slag produced by the desilication treatment; and then performing a dephosphorization treatment by supplying a slag-forming agent and an oxygen source to the molten pig iron in the converter smelting container. In this method: a silicon-containing substance, or a silicon-containing substance and a carbonaceous material, is/are added as a heat source to the converter smelting container at the time of the desilication treatment; the desilication treatment is performed under conditions wherein the basicity of the slag (mass% of CaO/mass% of SiO2) at the time of the completion of the desilication treatment is from 0.5 to 1.5 inclusive and the molten pig iron temperature at the time of the completion of the desilication treatment is from 1280°C to 1350°C inclusive; and then, in the intermediate de-slagging, 30 mass% or more of the slag produced by the desilication treatment is de-slagged from the rconverter smelting container.
摘要翻译：熔炼生铁的冶炼方法有：将生铁和冷铁源引入转炉冶炼容器; 熔化冷铁源，并通过与氧源一起供给含有CaO作为主要成分的辅助材料，对熔融生铁进行脱硅处理; 然后，作为中间除渣，对通过脱盐处理产生的至少一部分渣进行除渣; 然后通过向转炉熔炼容器中的熔融生铁供应造渣剂和氧源进行脱磷处理。在该方法中，在脱硅处理时将含硅物质或含硅物质和碳质材料作为热源添加到转炉冶炼容器中; 脱硅处理在脱硅处理结束时的渣的碱度（CaO的质量％/ SiO 2的质量％）为0.5〜1.5（以下）和生铁时的熔融生铁温度脱水处理完成为1280°C至1350°C; 然后，在中间除渣中，通过脱盐处理生成的30质量％以上的炉渣从转炉熔炼容器中脱渣。

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