Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Dissolution of Pb from the Complex Sulphide Concentrates Containing Galena and Arsenopyrite by Alkaline Oxidative Leaching

황비철광(黃砒鐵鑛)과 방연광(方鉛鑛)의 혼합황화광(混合黃化鑛)의 알카리산화(酸化)에 의한 Pb침출(浸出)

  • Youn, Ki-Byoung (Department of Materials Science & Engineering, Incheon University)
  • Published : 2008.06.27
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Abstract

In this work, the dissolution behavior of Pb from the complex sulphide concentrates containing Galena and Arsenopyrite by alkaline oxidative leaching was studied. The influences of leaching temperature, oxygen partial pressure, leaching time and NaOH concentration of leaching solution were examined at the leaching conditions in the range of $100^{\circ}C{\sim}140^{\circ}C$ temperature, $40psi{\sim}100psi\;PO_2$ and $0.5M{\sim}2M$ NaOH concentration. The optimum result was obtained at the leaching condition of leaching temperature $120^{\circ}C$, 100psi $PO_2$, leaching time 30min. and 2M NaOH concentration of leaching solution.

침출온도 $100^{\circ}C{\sim}140^{\circ}C$, 산소압력 $40psi{\sim}100psi$, NaOH농도 $0.5M{\sim}2M$ 범위의 침출조건에서 황비철광과 방연광의 혼합황화광의 알카리산화에 의한 Pb 침출실험이 수행되었다. 혼합황화광중의 방연광침출에는 침출용액중의 $OH^-$농도가 큰 영향을 미치며 낮은 $OH^-$농도의 침출용액에서는 침출반응의 진행에 따른 $OH^-$저하에 의하여 침출된 $HPbO_2^-$가 화합물로 다시 석출이 일어나서 침출율을 저하시킬 수 있다. 침출온도 $120^{\circ}C$, 산소압력 100psi, 침출시간 30분, NaOH 2M의 침출조건에서 처리한 침출잔사 중의 Pb함량이 가장 낮은 결과를 얻었다.

Keywords

References

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