자원리싸이클링 (Resources Recycling)

  • 제31권5호
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  • Pages.26-33
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  • 2022
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  • 2765-3439(pISSN)
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  • 2765-3447(eISSN)
한국자원리싸이클링학회 (The Korean Institute of Resources Recycling)
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NaClO3를 함유한 염산용액으로 몰리브데나이트광의 침출

Leaching of Molybdenite by Hydrochloric Acid Solution Containing Sodium Chlorate

  • ;
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  • 이만승 (목포대학교 공과대학 첨단재료공학과)
  • Nguyen, Thi Nhan Hau (Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University) ;
  • Nguyen, Thi Thu Huong (Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University) ;
  • Lee, Man Seung (Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University)
  • 투고 : 2022.08.16
  • 심사 : 2022.09.26
  • 발행 : 2022.10.31
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초록

몰리브덴은 소재로 널리 사용되므로 광석 또는 2차자원으로부터 회수가 많은 관심을 끌고 있다. 몰리브데나이트광으로부터 산화제로 NaClO3를 함유한 염산용액에 의한 몰리브데나이트광의 침출에 대해 조사했다. 염산 및 NaClO3의 농도, 반응 온도 및 시간과 광액밀도가 광석의 침출에 미치는 영향을 조사했다. 산화력이 센 강산용액에서 황화광은 황산이온으로 산화되면서 용해되어 칼슘이온과 gypsum을 형성하여 몰리브덴(VI)의 침출률을 감소시켰다. 최적조건(2.0 M HCl, 0.5 M NaClO3, 광액밀도 5 g/L, 90, 60분)에서 몰리브덴, 철, 칼슘 및 실리케이트의 침출률은 각각 90, 38, 29 및 67%이었다.

Molybdenum is widely used in many materials; thus, its recovery from ores and secondary resources has attracted considerable attention. In this study, the leaching of molybdenite ore using hydrochloric acid containing sodium chlorate as an oxidizing agent was studied. The effects of several variables, such as the concentrations of HCl and NaClO3, reaction temperature and time, and pulp density, on the leaching of the ore were investigated. Under strong acidic and oxidizing conditions, the sulfide in the ore was dissolved as a sulfate ion, which formed gypsum with Ca(II), leading to a decrease in the leaching percentage of Mo(VI) from the ore. The leaching percentage of molybdenum was greater than 90%, while those of iron, calcium, and silicon were 38, 29, and 67%, respectively, under the optimum conditions: 2.0 M HCl, 0.5 M NaClO3, pulp density of 5 g/L, temperature of 90 ℃, and treatment time of 60 min.

키워드

과제정보

This work was supported by a grant from the National Research Foundation of Korea (2018R1D1A1B07044951).

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