工程科学学报2017，Vol.39Issue(6)：838-845,8.DOI:10.13374/j.issn2095-9389.2017.06.004
高炉炉缸凝铁层物相分析
Analysis of the phase of the solid iron layer in blast furnace hearth
摘要
Abstract
The solidified iron layer in blast furnace ( BF) hearth was estimated based on the blast furnace damage. The phase compositions of the solidified iron layer were studied using scanning electron microscope and energy dispersive spectrometer. The tem-perature and proportions of graphite precipitation were calculated by using the Thermol-calc software and the TCFE8 database. Final-ly, the formation of the solidified iron layer was examined. The results suggest that the solidified iron comprises iron and graphite. The temperature of the graphite precipitation is affected by the composition of the hot metal, and it is much higher than the solidification temperature of the hot metal. The proportions of precipitated graphite are affected by the C and Si in the hot metal, whereas the precip-itated graphite increases the viscosity of the hot metal by 11. 9%. The graphite precipitates at the interface with the Fe- refractory at lower temperature than that of the graphite saturation, which allows the C migration from the hot metal to the refractory interface.关键词
高炉/炉缸/凝铁层/石墨碳/析出相Key words
blast furnace/hearth/iron solidified layer/graphite/phase precipitation分类
矿业与冶金引用本文复制引用
焦克新,张建良,刘征建,刘彦祥,梁利生,贾国栋..高炉炉缸凝铁层物相分析[J].工程科学学报,2017,39(6):838-845,8.基金项目
国家青年自然科学基金资助项目(51304014) （51304014）
