Recovery of Gallium and Aluminum from Electrofilter Dust of Alumina Calcination Plant in Bayer Process

Okudan M. D., Akcil A., TUNCUK A., DEVECİ H.

SEPARATION SCIENCE AND TECHNOLOGY, cilt.50, sa.16, ss.2596-2605, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 50 Sayı: 16
  • Basım Tarihi: 2015
  • Doi Numarası: 10.1080/01496395.2015.1062027
  • Dergi Adı: SEPARATION SCIENCE AND TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.2596-2605
  • Anahtar Kelimeler: Bayer process, electrofilter dust, gallium, leaching, by-product, INDUSTRY, EXTRACTION
  • Karadeniz Teknik Üniversitesi Adresli: Evet

Özet

In this study, the recovery of gallium (Ga) and aluminum (Al) from the by-product of Bayer process, the electrofilter dust of a calcination plant, was studied. Factorial leaching tests were also designed based on the results of the preliminary tests. Effects of factors and their interactions on the extraction of Ga and Al were demonstrated using Analysis of Variance of the findings. In the factorial design, nitric acid (HNO3) leaching tests up to 43.4% Ga and 35.2% Al were leached from the electrofilter dust. The addition of oxalic acid (H2C2O4) significantly enhanced the sulphuric acid (H2SO4) leaching of the dust with up to 48.3% Ga and 39.6% Al extractions.