Simultaneous leaching of rare earth elements and phosphorus from a Chinese phosphate ore using H3PO4

Author:

Li Zhili12,Xie Zhihao13,He Dongsheng1,Deng Jie4,Zhao Hengqin5,Li Hongqiang1

Affiliation:

1. Xingfa School of Mining Engineering, Wuhan Institute of Technology , Wuhan 430073 , Hubei , China

2. State Environmental Protection Key Laboratory of Mineral Metallurgical Resources Utilization and Pollution Control, Wuhan University of Science and Technology , Wuhan 430081 , Hubei , China

3. Kunming Metallurgical Research Institute , Kunming 650031 , Yunnan , China

4. Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences , Chengdu 610041 , Sichuan , China

5. Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences , Zhengzhou 450006 , Henan , China

Abstract

Abstract Although phosphate rock has been considered as a potential new rare earth elements (REEs) resource, the recovery of REEs from phosphate rock is impeded by technical challenges and cost issues. This study investigated the effects of operation conditions on the leaching efficiencies of REEs and phosphorus from Zhijin phosphate ore, a large phosphate deposit in China. The leaching process overtime was also studied by chemical analysis, scanning electron microscope with energy dispersive spectroscopy (SEM-EDS), and X-ray diffraction (XRD). The results indicated that the REEs from Zhijin phosphate ore were mainly present in fluorapatite and dolomite, and REEs had similar trends of leaching efficiency to those of phosphorus and magnesium. Under the conditions of 25 wt% phosphoric acid concentration in the initial pulp, a weight ratio of liquid to solid of 12 mL/g, a temperature of 60°C, an agitation speed of 220 rpm, and leaching time of 120 min, REEs and phosphorus leaching efficiencies of 97.8% and 99.7% were obtained. Most parts of dissoluble substances were decomposed within 30 min. Chemical analysis, SEM-EDS, and XRD results indicated that leaching efficiencies of minerals in Zhijin phosphate ore increased following the order: quartz, aluminosilicate, pyrite, fluorapatite, dolomite, and calcite.

Publisher

Walter de Gruyter GmbH

Subject

Health, Toxicology and Mutagenesis,Industrial and Manufacturing Engineering,Fuel Technology,Renewable Energy, Sustainability and the Environment,General Chemical Engineering,Environmental Chemistry

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3