The oxidation induration process of Hongge vanadium titanomagnetite pellets (HVTMP) with different amounts of CaO was investigated. This research forms part of an ongoing study on a novel and clean smelting process for the comprehensive utilization of Hongge vanadium titanomagnetite. The results revealed that the compressive strength of HVTMP could be enhanced by adding only 1% CaO because of the formation of fine grains and homogenous microstructures. However, a further increase in CaO decreased the compressive strength. Excessive amounts of CaO decreased the grain size but increased the porosity, impeding the oxidation induration process of HVTMP. An increase in CaO slightly influenced the phase compositions but largely reduced their peak intensities. An innovative index, namely induration degree, was proposed to directly estimate the induration behavior of HVTMP. A schematic diagram was presented to clearly describe the induration mechanism of HVTMP with different amounts of added CaO.

研究了不同CaO含量的鸿格钒钛磁铁矿颗粒（HVTMP）的氧化硬化过程。这项研究是一项正在进行的研究的一部分，该研究正在进行一个新颖，清洁的冶炼工艺，以全面利用鸿格钒钛磁铁矿。结果表明，由于形成细晶粒和均匀的微观结构，仅添加1％CaO可以提高HVTMP的抗压强度。但是，CaO的进一步增加降低了抗压强度。过量的CaO会减小晶粒尺寸，但会增加孔隙率，从而阻碍了HVTMP的氧化硬化过程。CaO的增加会稍微影响相组成，但会大大降低其峰强度。创新指数，即硬结程度，提出直接估计HVTMP的硬结行为。给出了示意图以清楚地描述具有不同添加量的CaO的HVTMP的硬结机理。