关键词: 沉积型锐钛矿　工艺矿物学　赋存状态　化学选矿　流程设计

Abstract: To investigate the mineral occurrence characteristics and chemical beneficiation adaptability of sedimentary
anatase ore,a systematic process mineralogy study was conducted on the Xuanwei Formation anatase ore from Junlian County,
Sichuan. The results show that the TiO2 content of the ore is 6. 62%,with 83. 37% of the titanium existing in the form of anatase.
X-ray diffraction (XRD) and scanning electron microscopy-energy dispersive spectroscopy (SEM-EDS) analyses revealed
that the anatase grains are predominantly euhedral to subhedral tabular and columnar crystals with fine particle size. They commonly
occur as independent particles,intergrowths,or inclusions within clay minerals such as kaolinite (47. 8%) and illite
(10. 3%),resulting in complex mineral dissemination and making monomer liberation difficult. Based on these mineralogical
characteristics,a multi-metal stepwise recovery process centered on "pretreatment,two-stage acid leaching,stepwise precipitation"
was designed and proposed to achieve the synergistic separation and high-value utilization of elements such as titanium,iron,
and aluminum. This research provides an important theoretical basis and technical support for the resource evaluation and
green efficient development of similar refractory sedimentary titanium ores.

Key words: sedimentary anatase,process mineralogy,occurrence state,chemical beneficiation,flowsheet design