【摘要】 基于南钢高炉炉料结构,采用FactSage热力学计算软件,研究球团矿配比、化学成分及碱度R对初渣性能及液相形成的影响。结果表明:（1）高炉内随着炉料还原的进行,FeO降低,适当提高球团矿配比,可使初渣熔化区间变小;（2）Al₂O₃对初渣熔化区间的影响与R有关,选择炉料时,若R较高,宜适当增加Al₂O₃,若R较小,宜适当降低Al₂O₃,以保证炉料合适的软熔区间;（3）不同R下,随着MgO的增加,初渣熔化温度提高,熔化区间增大,为控制软熔带厚度,宜降低MgO入炉量;（4）初渣主要物相为液相及Ca₃MgSi₂O₈,相同温度下,随着球团矿配比的增加,初渣液相越多,Ca₃MgSi₂O₈越少。更多还原

【Abstract】 It is studied the effects of different pellet proportions,the burden chemical analysis and basicity R on primary slag property and liquid phase formation by using the thermodynamic software FactSage based on the burden mix of Nangang blast furnace,and the results suggest:（1） FeO drops along with the proceeding of furnace burden reduction operation,and increase of the pellet proportion to some extent will narrow the temperature range between the initial melting and fully melting of the primary slag;（2） the effect of Al₂O₃ on the said range is related to the basicity（R）,therefore,Al₂O₃ should be increased if R of the selected charges is high,or should be decreased if the R is low,so as to ensure that the burden stay in an adequate temperature range between the initial softening and fully softening;（3） under different basicity conditions,the melting temperature of the primary slag rises and the temperature range of smelting enlarges along with the increase of MgO content,thus the MgO input should be reduced to control the thickness of the cohesive zone;（4） the primary slag mainly appears in a liquid phase and Ca₃MgSi₂O₈ status,and under the same temperature,it appears as the liquid phase more and more,and as Ca₃MgSi₂O₈ status less and less along with the increase of the pellet proportion.更多还原