Scholarlink

<p>In the in-situ leaching of weathered crust elution-deposited rare earth ores, the migration and deposition of micro-fine particles within the ore body can reduce permeability, impairing leaching efficiency. To identify the primary migrating components, three porous media sizes (+ 0.150 to − 0.315&#xa0;<i>mm</i>, + 0.315 to − 0.450&#xa0;<i>mm</i>, and + 0.450 to − 0.600&#xa0;<i>mm</i>) and three suspended particle fractions (− 0.026&#xa0;<i>mm</i>, + 0.026 to − 0.050&#xa0;<i>mm</i>, and + 0.050 to − 0.075&#xa0;<i>mm</i>) were used as the research subjects. The effects of particle size on migration laws and mechanisms in rare earth ore, were investigated. Besides, the relationship between fine particle migration rate and ore body permeability was explored. Results show that as particle size increasing, primary migration and deposition zones shift from upper and middle sections to upper and lower sections. The predominant migration size range is 50–60&#xa0;<i>μm</i>, with rising peak turbidity in leachate. Porous media particle size influences micro-fine particle migration and deposition more than suspended particles. The + 0.315 to − 0.450&#xa0;<i>mm</i> samples form the optimal porous medium, with minimal surface contact angle and adhesion work compared to others. For suspended particles of 0–26&#xa0;<i>μm</i>, major migration and deposition proportions are lowest at 2.1% and 1.6%, respectively. A model relating particle mobility to the permeability coefficient reveals that permeability initially increases then decreases with mobility rising.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Research on the influence mechanism of particle size on the migration and deposition law of weathered crust elution-deposited rare earth ores

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年6月20日

查看全文
  • Defeng Liu,
  • Xuchen Li,
  • Zhenyue Zhang,
  • Wenda Guo,
  • Zhuo Chen,
  • Ruan Chi

摘要

In the in-situ leaching of weathered crust elution-deposited rare earth ores, the migration and deposition of micro-fine particles within the ore body can reduce permeability, impairing leaching efficiency. To identify the primary migrating components, three porous media sizes (+ 0.150 to − 0.315 mm, + 0.315 to − 0.450 mm, and + 0.450 to − 0.600 mm) and three suspended particle fractions (− 0.026 mm, + 0.026 to − 0.050 mm, and + 0.050 to − 0.075 mm) were used as the research subjects. The effects of particle size on migration laws and mechanisms in rare earth ore, were investigated. Besides, the relationship between fine particle migration rate and ore body permeability was explored. Results show that as particle size increasing, primary migration and deposition zones shift from upper and middle sections to upper and lower sections. The predominant migration size range is 50–60 μm, with rising peak turbidity in leachate. Porous media particle size influences micro-fine particle migration and deposition more than suspended particles. The + 0.315 to − 0.450 mm samples form the optimal porous medium, with minimal surface contact angle and adhesion work compared to others. For suspended particles of 0–26 μm, major migration and deposition proportions are lowest at 2.1% and 1.6%, respectively. A model relating particle mobility to the permeability coefficient reveals that permeability initially increases then decreases with mobility rising.