【摘要】 为了探讨铬铁矿的熔融还原机理,利用光学显微镜、电子扫描显微镜和能谱分析技术,观察分析熔融滴下实验中不锈钢母液炉料滴下物的结构形态变化。结果表明,还原过程可分为两个阶段:首先是铬铁矿通过CO气体的间接还原,其还原机理可用未反应核模型解释;其后是铬铁矿逐步在渣相中溶解,被固体碳直接熔融还原。更多还原

【Abstract】 The structure change of chromite during smelting dropping of crude stainless steel was studied by means of optical micrograph analysis, scanning electron microscope (SEM) and energy dispersive Xray analysis (EDAX). The smelting reduction mechanism of chromite was primarily discussed. The results show that the process of reduction occurs in two stages. At the first stage, the chromite ore is reduced indirectly with CO, which can be described well by the unreacted core model. The second stage is involved in the dissolution of chromite ore into the slag, and the direct smelting reduction is initiated by solid carbon.更多还原