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Rare earth elements recovery using staged precipitation from a leachate generated from coarse coal refuse

Zhang, Wencai ; Honaker, Rick Q

International Journal of Coal Geology, 01 July 2018, Vol.195, pp.189-199 [Tạp chí có phản biện]

ISSN: 0166-5162 ; E-ISSN: 1872-7840 ; DOI: 10.1016/j.coal.2018.06.008

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  • Nhan đề:
    Rare earth elements recovery using staged precipitation from a leachate generated from coarse coal refuse
  • Tác giả: Zhang, Wencai ; Honaker, Rick Q
  • Chủ đề: Rare Earth Elements (Rees) ; Leachate ; Coal Refuse ; Recovery ; Staged Precipitation ; Rare Earth Elements (Rees) ; Leachate ; Coal Refuse ; Recovery ; Staged Precipitation ; Engineering
  • Là 1 phần của: International Journal of Coal Geology, 01 July 2018, Vol.195, pp.189-199
  • Mô tả: Recovery of rare earth elements (REEs), especially heavy and critical REEs, from alternative resources such as coal refuse has recently become increasingly important. A natural leachate containing 6.14 ppm of REEs with a pH value of 2.70 was collected from a coal coarse refuse pile and utilized as a feedstock for REE recovery tests. The pH value of the natural leachate was gradually increased in a step-wise manner using a sodium hydroxide solution which produced several precipitates. A precipitate containing about 1.1% total REEs was obtained in the pH range of 4.85–6.11 while recovering 80% of the REEs contained in the original leachate. The leaching and staged precipitation process enriched both the critical and heavy REE fractions. The ratios of heavy-to-light (H/L) and critical-to-uncritical (C/UC) REEs in the precipitate were much higher than the coarse refuse material (H/L: 1.54 vs 0.21, C/UC: 1.51 vs 0.34). Additionally, the precipitate contained 18.4% Al, 1.7% Zn,...
  • Ngôn ngữ: English
  • Số nhận dạng: ISSN: 0166-5162 ; E-ISSN: 1872-7840 ; DOI: 10.1016/j.coal.2018.06.008

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