利用邱氏高温透明槽实验平台的高速温度采集模块结合原位重量分析法研究了冶金级氧化铝在冰晶石电解质中的溶解过程,尤其是结壳的形成与溶解过程,测定了结壳的溶解速率并分析了结壳的主要物理化学性质.通过对氧化铝溶解结壳过程的热量计算,分析了氧化铝加料过程中的热量平衡,以及加料量、氧化铝预热温度、电解液温度、过热度对溶解过程的影响.研究发现,在热平衡重新建立的过程中,氧化铝从体系中吸收的热量,首先由电解液降温来快速补充;当电解质大幅降温仍满足不了氧化铝的热量需求时,便由电解质冷凝放热来提供热量.相对于较高的电解温度、过热度而言,少量、多频次的氧化铝加料能够获得更加稳定的电解条件.

According to the characteristics of the iron bath smelting reduction process with a thick slag layer, a static model for heat and mass balance calculation was developed.The calculation of sulfur distribution in the three phases of slag, metal and gas was particularly embedded in the model.The influence of the operational parameters on the sulfur emissions during the process was analyzed with the modeling results.Effective control of the gaseous sulfur emission was analyzed.The modelling results were compared with the actual production data from a modern blast furnace ironmaking plant to clarify the advantages of the process on reducing the emission of gaseous sulfur and providing the appropriate operation conditions.