文献类型：期刊文献

英文题名：A Laboratory-Scale Evaluation of an Integrated Pre-Concentration Route for a Specific Low-Grade Anatase Ore

作者：Zhang, Min Yang, Wu Xie, Fei Ao, Xuanfeng

第一作者：张敏

通信作者：Yang, W[1]

机构：[1]Guizhou Inst Technol, Coll Resources & Environm Engn, Guiyang 550003, Peoples R China;[2]Guizhou Univ, Min Coll, Guiyang 550025, Peoples R China;[3]Guizhou Tianyi Hengsheng Technol Co Ltd, Guiyang 550081, Peoples R China

第一机构：贵州理工学院资源与环境工程学院

通信机构：corresponding author), Guizhou Inst Technol, Coll Resources & Environm Engn, Guiyang 550003, Peoples R China.|贵州理工学院资源与环境工程学院;贵州理工学院;

年份：2026

卷号：16

期号：7

外文期刊名：MINERALS

收录：;Scopus(收录号：2-s2.0-105045884239);WOS:【SCI-EXPANDED(收录号:WOS:001832721700001)】；

基金：This research was funded by the 15th Five-Year Plan for Natural Resources of Guizhou Province (No. GZWH-2025-1311) and the Guizhou Provincial Science and Technology Plan Project (Qianke Tongyan [2024] No. 379, Qianke Hezhicheng [2023] General 143, Qianke He Zhongda [2025] 017) and Guizhou Provincial Basic Research Program (Qiankehe foundation [2024 Youth 359].

语种：英文

外文关键词：anatase; lateritic anatase ore; selective desliming; intensive scrubbing; pre-concentration

摘要：Anatase-bearing lateritic ores from Qinglong, Guizhou Province, China, are characterized by extremely low TiO2 grade, high clay content, fine-grained dissemination, and complex intergrowths with iron oxides, which severely hinder efficient beneficiation. In particular, anatase commonly occurs as ultra-fine particles encapsulated by clay minerals or closely associated with iron oxides, and its surface is often covered by nanoscale goethite films, resulting in surface passivation and pseudo-magnetic behavior. These characteristics lead to a pronounced contradiction between mineral liberation and excessive slime generation during conventional grinding processes. To address these challenges, a high-efficiency pre-concentration flowsheet was developed based on selective desliming, stage grinding, intensive scrubbing, flotation, and weak magnetic separation. Selective desliming via hydrocyclones was adopted, which is inferred to preferentially discard true slimes finer than 10 mu m while potentially retaining most fine anatase particles within the underflow. Stage grinding was then applied, which may promote the improved liberation of anatase and early rejection of coarse gangue, and may help reduce overgrinding. Intensive scrubbing was introduced, which is expected to weaken or partially remove iron oxide coatings from the anatase surface, thereby potentially restoring surface activity and reducing pseudo-magnetic interference. Subsequent flotation and low-intensity magnetic separation were optimized to increase the concentrate TiO2 grade and cut iron impurities, which may be associated with improved surface selectivity and weakened pseudo-magnetic responses. Closed-circuit beneficiation tests demonstrated that a TiO2 concentrate with a grade of 29.62% and a recovery of 65.4% could be obtained from an ore with an initial TiO2 grade of only 4.39%. Moreover, approximately 40% of the feed mass was rejected at the pre-concentration stage, significantly reducing the load on downstream separation processes. The proposed process demonstrates promising potential as a technical route for the beneficiation of similar refractory anatase-bearing lateritic ores.