A study on the structural behavior of reduced pyrite ash pellets by XRD and XRF analysis

TUĞRUL N., Derun E., PİŞKİN M. B., Ekerim A.

WASTE MANAGEMENT & RESEARCH, cilt.27, sa.3, ss.281-287, 2009 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 27 Sayı: 3
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1177/0734242x08090404
  • Dergi Adı: WASTE MANAGEMENT & RESEARCH
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.281-287
  • Anahtar Kelimeler: Pyrite ash, iron, reduction, pellet, wmr 1340-6, FLY-ASH, PELLETIZATION, BENTONITE, MECHANISM
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

In Turkey, pyrite ash is created as waste from the roasting of pyrite ores in the production of sulfuric acid. These processes generate great amounts of pyrite ash waste that creates serious environmental pollution due to the release of acids and toxic substances. Pyrite ash waste can be used in the iron production industry as a raw material because of its high Fe(2)O(3) concentration. The aim of this study was to investigate the reduction behaviour of pyrite ash pellets. The pyrite ashes were reduced to obtain the iron contained in pellets. Pyrite ashes samples were pelletized dried at 105 degrees C for 24 h and sintered at 1200 degrees C for 30 min. then reduced in a pressure of 4 atm. under argon gas. The mineralogical transformations that occurred during reduction were analysed by X-ray diffraction and X-ray fluorescence. The X-ray diffraction and X-ray fluorescence measurements of these samples showed that Fe(3)O(4) was successfully reduced to a metallic iron phase in a laboratory-scale electric arc furnace.