DISSOLUTION BEHAVIOUR OF IMPURITIES FROM SCHEELITE IN OXALIC ACID SOLUTIONS


Kalpakh A. O. , Ilhan S. , Kahruman C. , Yusufoglu I.

T T Chen Honorary Symposium on Hydrometallurgy, Electrometallurgy and Materials Characterization held during the 141st TMS Annual Meeting and Exhibition, Florida, Amerika Birleşik Devletleri, 11 - 15 Mart 2012, ss.777-784 identifier identifier

  • Cilt numarası:
  • Basıldığı Şehir: Florida
  • Basıldığı Ülke: Amerika Birleşik Devletleri
  • Sayfa Sayıları: ss.777-784

Özet

Scheelite is the main raw material in tungsten production. In hydrometallurgical processes, extraction of tungstate ions into solution is very important. During the leaching of scheelite in oxalic acid solutions, tungsten dissolves as a chelate complex. Scheelite includes impurities along with calcium tungstate. Determination of the dissolution of these impurities is important in the subsequent tungsten production stages. In this study, scheelite was dissolved in oxalic acid solutions and the dissolution of impurities was investigated. The quantities of dissolved impurities were determined by ICP - OES and characterization of the undissolved impurities in the leach residues was carried out by SEM - EDS analysis.