关键词: 钒钛磁铁精矿　, 工艺矿物学　, 矿物组成　, 解离特征　, 连生关系

Abstract: To reveal the key process mineralogical characteristics of vanadium-titanium magnetite concentrate from the Panxi area and provide guidance for beneficiation upgrading,impurity reduction and process optimization,chemical analysis,X ray diffraction (XRD),scanning electron microscopy coupled with energy-dispersive spectroscopy (SEM-EDS),and process mineralogical parameter automatic analysis system (BPMA) were used to systematically investigate the chemical composition, mineral composition,dissemination size,liberation and intergrowth characteristics,as well as the occurrence regularity of Fe and Ti in the sample.The results show that the sample has a total Fe (TFe) grade of 53.62%,TiO2 grade of 12.49%,and sulfur content of 1.10%.Titanomagnetite is the dominant mineral with a content of 86.35%,and the distribution rates of Fe and Ti in it reach 92.36% and 86.49%,respectively,making it the principal carrier for the comprehensive recovery of iron and titanium. Titanomagnetite mainly occurs as fine to ultra-fine disseminated grains,and the sum of free particles and rich intergrowths ac counts for 86.35%,indicating favorable liberation conditions. In contrast,ilmenite,titanite,pyrrhotite and other minerals are characterized by low content,fine particle size and poor liberation degree,and are closely intergrown with titanomagnetite,ti tanian amphibole and chlorite.Widespread ilmenite exsolution textures within titanomagnetite are identified as the key minera logical factor restricting the efficient removal of TiO2 from iron concentrate.This study clarifies the core characteristics of the ore,i.e.,high Fe-Ti enrichment,fine dissemination,solid solution symbiosis and complex intergrowth,and provides a direct process mineralogical basis for quality improvement,impurity reduction,precise separation and process flow optimization of sim ilar vanadium-titanium magnetite concentrates in the Panxi region.

Key words: 　vanadium-titanium magnetic concentrate,process mineralogy,mineral composition,dissociation characteris tics,interrelationship