Effect of conventional and microwave thermal treatments on floatability of low- and high-rank lignites

Ozkan S. G., Baktarhan Y., Gungoren C., Demir I.

ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS, cilt.42, ss.2357-2369, 2020 (SCI-Expanded, Scopus) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 42
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1080/15567036.2019.1643426
  • Dergi Adı: ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, ABI/INFORM, Aerospace Database, Agricultural & Environmental Science Database, Applied Science & Technology Source, CAB Abstracts, Communication Abstracts, Compendex, Computer & Applied Sciences, Environment Index, Greenfile, INSPEC, Metadex, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.2357-2369
  • Anahtar Kelimeler: Lignite, flotation, conventional thermal treatment, microwave, hydrophilicity, COPPER ORE, COAL, FLOTATION, IRRADIATION, DESULFURIZATION, PRETREATMENT, IMPROVEMENT, MINERALOGY, MECHANISM, WATER
  • İstanbul Üniversitesi-Cerrahpaşa Adresli: Evet

Özet

Thermal treatment is one of the well-known methods used before froth flotation to remove the polar groups from coal surfaces to make them more hydrophobic. In this study, the effect of conventional and microwave thermal treatments on the wettability of low and high-rank lignite was investigated using flotation experiments, zeta potential, and bubble-particle attachment time measurements, as well as hydrophilicity index analyses. The results showed that both of the thermal treatments increased hydrophobicity, and therefore floatability of the coal samples. The optimum results were achieved with conventional and microwave thermal treatment for the low and high-rank coals, respectively.