摘要
以不同预还原度的块矿及块矿与烧结矿的混合矿为研究对象,利用单颗粒荷重软化试验装置,考察了氧气高炉及传统高炉还原气氛对块矿及混合炉料软熔性能的影响。研究发现,高还原势的氧气高炉条件下,含铁炉料还原度的提高导致其颗粒内部铁相数量增加,低熔点渣相数量减少,块矿的软熔性能与传统高炉条件相比有所改善。同时,通过对软熔过程相关数据及炉料颗粒微观结构的分析,发现氧气高炉条件下,块矿-烧结矿混合炉料在界面上发生了交互作用;由于铁相数量的增加及渣相的减少,不同渣相的接触时间被推迟,接触的渣量也减少,导致相对于传统高炉条件,氧气高炉条件下发生交互作用的温度升高,其作用强度减弱。
This research describes the influence of oxygen blast furnace（OBF） atmosphere and the traditional blast furnace（T- BF） atmosphere on the softening and melting behavior of lump burden and lump- sinter mixed burden using the softening and melting test. The results indicate that in the OBF atmosphere,the development of reduction degree increased the quantity of the iron phase in the burden particle,and decreased the quantity of slag phase with low melting temperature,so the softening and melting properties of lump ore are developed compared to that in the T-BF case. In addition,through the analysis on relevant data of softening and melting process and on the microstructure of burden particles,it is revealed that the interaction effect also happened at the interface between lump and sinter particles in the OBF case.Because of the increase of iron phase amount and the reduction of slag phase amount,the contact of different slag is delayed,and the amount of contacted slag is reduced. Therefore,comparing with the T-BF case,the temperature on which the interaction behavior happened in the OBF case is raised,and the effect intensity is weakened.
出处
《钢铁》
CAS
CSCD
北大核心
2016年第2期15-21,共7页
Iron and Steel
基金
国家重点基础研究发展(973)计划资助项目(2012CB720401)
国家自然科学基金资助项目(51134008)
关键词
氧气高炉
块矿
软熔行为
微观结构
交互作用
oxygen blast furnace
lump ore
softening and melting behavior
microstructure
interaction effect
