【摘要】 辽宁朝阳地区发现了丰富的钒钛磁铁矿资源，其预选精矿的特征为具有高硅高钛高钒的显著特征。对该精矿进行工艺矿物学研究，探索进一步脱硅提质的可行性，对于该地区钒钛资源的深度开发利用具有重要意义。运用选矿工艺矿物学研究方法，查明了该精矿的主要矿物及其嵌布关系，铁精矿中有价矿物主要为钛磁铁矿、钛铁矿及少量的赤铁矿，脉石矿物主要为铁橄榄石和长石等硅酸盐矿物及少量的榍石。钒和钛主要赋存在钛磁铁矿是导致铁精矿高钒高钛的主要原因，钛磁铁矿之中嵌布着细小粒度的脉石，导致了铁精矿的高钙、高硅特征。通过细磨后磁选的手段可以有效地将该精矿提质。而钛磁铁矿中紧密嵌布的细小脉石颗粒通过细磨较难充分解离，部分钙、硅元素以常规细磨磁选较难去除，提质后精矿依然存在6.68%的SiO₂和3.22%的CaO。更多还原

【Abstract】 A vanadium-titanium magnetite resource has been discovered in Chaoyang, Liaoning, with the pre-selected concentrate being notable for high silicon, titanium, and vanadium content. Conducting process mineralogy research on this concentrate to explore the possibility of further silicon removal and quality enhancement is of great significance for the in-depth development and utilization of local vanadium-titanium resources. This study uses mineral processing and mineralogy research methods to identify the main minerals and their intergrowth relationships in the concentrate. The valuable minerals in the iron concentrate are mainly ilmenomagnetite, ilmenite, and a small amount of hematite. Gangue minerals are mainly silicate minerals like iron olivine and feldspar, along with a small quantity of sphene. The high vanadium and titanium content in the iron concentrate is mainly due to the presence of vanadium and titanium in ilmenomagnetite. The fine-grained gangue minerals intergrown with ilmenomagnetite lead to the high calcium and silicon content in the iron concentrate. After fine grinding and magnetic separation, the quality of the concentrate can be improved. However, due to the intimate intergrowth of fine-grained gangue minerals in ilmenomagnetite, it is difficult for conventional fine grinding and magnetic separation to fully liberate and remove the calcium and silicon elements. Therefore, even after quality improvement, the concentrate still contains 6.68% SiO₂ and 3.22% CaO.更多还原