化工矿物与加工2026，Vol.55Issue(6)：9-16,8.DOI:10.16283/j.cnki.hgkwyjg.2026.06.002
含稀土磷精矿酸浸过程中磷与稀土的浸出行为研究
Study on leaching behavior of phosphorus and rare earth in acid leaching process of phosphate concentrate containing rare earth
摘要
Abstract
Associated rare earth phosphate rock is an important strategic mineral resource in China.It is of great sig-nificance to realize the synergistic and efficient extraction of phosphorus and rare earth for improving the comprehen-sive utilization level of resources and ensuring the safety of rare earth resources.In this paper,rare earth-containing phosphate ore is taken as the research object,and the flotation enrichment,P2O5 acid leaching process optimization and rare earth enhanced leaching technology are carried out around the core goal of efficient separation and synergistic leaching of phosphorus-rare earth co-associated resources.The results show that the grade of P2O5 in phosphate con-centrate reaches 29.56%and the mass fraction of total rare earth(∑REE)is 1 631.95 μg/g after the direct flotation enrichment of raw ore by'one roughing and three benefication',which realizes the pre-enrichment of phosphorus and rare earth.The optimum process parameters for efficient leaching of P2O5 are as follows:reaction time 2 h,sulfuric acid mass concentration 200 g/L,liquid-solid ratio 4 mL/g,reaction temperature 35℃.Under this condition,the leac-hing rate of P2O5 is 87.88%,and the leaching rate of rare earth is only 17.60%,which is difficult to meet the require-ments of resource recovery.Aiming at the problem of low leaching efficiency of rare earth,an enhanced leaching sys-tem was constructed by increasing acid concentration,liquid-solid ratio and reaction temperature,which could greatly increase the leaching rate of ∑REE to 47.45%,and realize the synergistic and efficient leaching of phosphorus and rare earth.The research results can provide technical support for the efficient and clean utilization of rare earth phos-phate rock and the large-scale recovery of associated rare earth resources.关键词
稀土/磷矿/协同提取/酸浸/正浮选/条件试验Key words
rare earth/phosphate rock/collaborative extraction/acid leaching/positive flotation/conditional test分类
矿业与冶金引用本文复制引用
阮耀阳,崔利伟,周芳,罗惠华,池汝安,邓博纳..含稀土磷精矿酸浸过程中磷与稀土的浸出行为研究[J].化工矿物与加工,2026,55(6):9-16,8.基金项目
国家重点研发计划项目(2022YFC2904701) （2022YFC2904701）
国家磷资源开发利用工程技术研究中心开放基金项目(NECP-2024-01) （NECP-2024-01）
武汉知识创新专项项目(2023020201020437) （2023020201020437）
湖北省自然科学基金联合基金项目(2023AFD208). （2023AFD208）
