摘要
为全面掌握鞍钢的烧结矿碱度、天然块矿配加比例和不同炉料结构的软熔特性,得到可评价炉料结构的方法,通过实验室试验,系统研究了不同碱度烧结矿的冶金性能,不同碱度烧结矿与球团矿搭配、烧结矿与球团矿和天然块矿搭配的复合炉料结构高温特性。结果表明,随碱度提高,矿物组成渐趋合理,烧结矿的还原和粉化指标改善,在碱度为1.90~2.05时,单一烧结矿的软化熔融性能较好;在碱度为1.95~2.15时,透气性较好;当烧结矿与球团矿搭配,碱度为1.90~2.15时,软熔区间窄,S特性值低;在配加天然块矿后,复合炉料的软化区间变宽,熔融区间变窄,综合性能得到改善。基于研究结果,提出了适合鞍钢原料条件的炉料间交互反应性的评价指数,通过指数判断,高炉天然块矿的适宜配加比例为15%~20%。
In order to fully understand the softening-meting properties of sintering ore with different basicity, ration of natural lump ore, and BF burden structures in Ansteel and find the methods used to estimate BF burden structures, some investigations were made systematically in laboratory on the metallurgical performance of sintering ore with different basicity. In addition, the high temperature performance of combined BF burdens forming by the sinter with various basicity, pellet and natural lump ores, were also discussed. The results show that the mineral sinter compositions became more rational with the increase of basicity, hence, the reducibility and the reduction degradation were improved. When the basicity was in the range of 1.90-2.05, good softening-melting performance could be obtained just with individual sinter ore. As the basicity increased to 1.95-2.15, the penetrability was better. When the basicity of the combination of sinter and pellet was 1.90-2.15, the softening and melting zones became narrow and property with low S was realized. With the addition of natural lump ore, the softening zone widened while the melting zone became narrow, the comprehensive performance was improved. Based on the research results, an assessment index for Ansteel raw material was obtained for the interactive reaction among burdens. The index can be used to assess the reasonableness of BF burden structure. Considering the reactivity index and the economic cost, the reasonable proportion of lump ores in blast furnace needs to be controlled within 15%-20%.
出处
《钢铁》
CAS
CSCD
北大核心
2016年第9期11-15,共5页
Iron and Steel
基金
辽宁"百千万人才工程""百人层次"培养经费资助项目
国家发改委企业技术中心创新能力建设资助项目(辽经科技[2008]195号)
关键词
烧结矿碱度
鞍钢炉料结构
冶金性能
软化熔融性能
交互反应
basicity of sinter
burden structure of Ansteel
metallurgical property
softening-melting property
interactive reaction
