Recovery of Vanadium from a High Ca/V Ratio Vanadium Slag Using Sodium Roasting and Ammonia Leaching

  • Song Xu
  • Mujun Long
  • Dengfu Chen
  • Helin Fan
  • Yuting Chen
  • Xue Sun
Conference paper

Abstract

In order to seek an effective extraction process for vanadium, the recovery of vanadium from a high Ca/V ratio vanadium slag was studied by sodium roasting and ammonia leaching. In the present paper, the oxidation and leaching process of vanadium slag was investigated by X-ray diffraction (XRD), scanning electron microscopy and energy dispersive X-ray spectrometry (SEM/EDS) techniques. The effects of ammonium carbonate concentration, leaching temperature and leaching time on the leaching ratio of vanadium were discussed. As indicated in the experimental result, the optimal (NH4)2CO3 concentration was 120g/L, leaching temperature was 60°C and leaching time was 20 min. Approximately 92% of the vanadium was recovered under the optimal conditions. Furthermore, by means of X-ray diffraction analysis, the phase transformations of the vanadium slag during roasting and leaching processes were analyzed and discussed.

Keywords

Vanadium slag Extraction of vanadium Sodium salt roasting Ammonia leaching 

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Copyright information

© TMS (The Minerals, Metals & Materials Society) 2014

Authors and Affiliations

  • Song Xu
    • 1
  • Mujun Long
    • 1
  • Dengfu Chen
    • 1
  • Helin Fan
    • 1
  • Yuting Chen
    • 1
  • Xue Sun
    • 1
  1. 1.Laboratory of Metallurgy and Materials, College of Materials Science and EngineeringChongqing UniversityChongqingP.R. China

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