Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Water Leaching of Tungsten and Vanadium through Mechanochemical Reaction of Their Oxides and Alkali-Compounds

알칼리화합물과 텅스텐/바나듐산화물의 기계화학반응을 이용한 수 침출 연구

  • Kim, Byoungjin (Dept. of Energy & Resources Engineering, Kangwon National University) ;
  • Kim, Suyun (Dept. of Energy & Resources Engineering, Kangwon National University) ;
  • Lee, Jaeryeong (Dept. of Energy & Resources Engineering, Kangwon National University)
  • 김병진 (강원대학교 에너지자원공학과) ;
  • 김수윤 (강원대학교 에너지자원공학과) ;
  • 이재령 (강원대학교 에너지자원공학과)
  • Received : 2018.08.08
  • Accepted : 2018.08.21
  • Published : 2018.08.31
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Abstract

Water leaching of tungsten(W) and vanadium(V) was researched from their oxides through mechanochemical (MC) reaction with alkali compounds. Intensive grinding for the mixture of tungsten/vanadium oxide and alkali compounds (NaOH, $Na2CO_3$) was carried out with change of their mixing ratios and grinding duration. Water soluble compounds, $Na_2WO_4$ and $NaVO_3$, were synthesized through MC reaction and their solubilities increased in proportion to the mixing ratio of sodium compound and grinding times. Whereas vanadium leachability was less affected by the mixting ratio and grinding times. The leachabilities of 99.0% were accomplished by a short period of MC treatment, W (30 min.) and V (5 min.). This process enable us to extract W and V from their oxides via a water leaching, and can be applied to the selective recovery of W and V from $DeNO_x$ spent catalysts.

알칼리화합물과의 기계화학반응을 통해 산화물로부터 텅스텐(W)과 바나듐(V) 성분의 수 침출 특성을 조사하였다. 기계화학반응은 알칼리화합물의 혼합율과 분쇄시간을 변화시키면서 실시하였고, 그 결과, 수용성 용해특성의 $Na_2WO_4$와 $NaVO_3$가 각각 생성되었으며 수 침출에 의한 W, V의 침출특성은 알칼리화합물의 혼합율과 분쇄시간에 비례하여 증가하였다. 99% 이상의 침출율은 각각 30분 (W), 5 분 (V)의 짧은 기계화학적 처리를 통하여 달성되었다. 이러한 기계화학적 처리를 통하여 텅스텐, 바나듐산화물로부터 수 침출에 의한 추출이 가능하였고, 이 공정은 탈질촉매로부터 텅스텐, 바나듐의 선택적 회수에 적용될 수 있다.

Keywords

References

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