Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Production of SrCO3 from SrSO4 through the Black Ash Process

Black Ash법을 이용한 SrSO4로부터 SrCO3 제조

  • Received : 2021.09.27
  • Accepted : 2021.10.12
  • Published : 2021.10.30
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Abstract

In this study, using strontium sulfate (SrSO4) recovered from magnetite ore in Hongcheon, the Black Ash process was used to produce strontium carbonate (SrCO3). In the carbothermic reaction step, SrSO4 was reacted with carbon (C) at 1273 K under Ar gas atmosphere using a gas-tight quartz reactor to produce strontium sulfide (SrS). Afterward, water leaching of the residues produced from the carbothermic reaction at 353 K and carbonation of the leaching solution using sodium carbonate (Na2CO3) at 298 K were conducted to produce SrCO3. The results of this study demonstrate the feasibility of the production of SrCO3 via the Black Ash process using domestic magnetite ore containing strontium (Sr).

본 연구에서는 Black Ash법을 이용하여 홍천 자철광으로부터 회수된 황산스트론튬 (SrSO4)으로부터 탄산스트론튬 (SrCO3)을 제조하였다. Carbothermic 반응 단계에서는 황화스트론튬 (SrS)을 제조하기 위해 1273 K의 Ar 가스 분위기의 석영반응기를 사용하여 SrSO4를 탄소와 같이 반응시켰다. 이후 353 K에서 carbothermic 반응으로 회수된 잔사의 수침출 및 298 K에서 탄산나트륨 (Na2CO3)를 이용한 침출액의 탄산화 반응을 통해 SrCO3을 제조하였다. 본 연구결과로부터 Black Ash법 활용 시 국내산 자철광 내 함유된 스트론튬 (Sr)으로 부터 고순도 탄산스트론튬 제조가 가능함을 실험적으로 증명하였다.

Keywords

Acknowledgement

본 연구는 한국지질자원연구원 주요사업인 "국내 부존바나듐(V) 광물자원 선광/제련/활용기술 개발" 과제(GP-2020-013, 21-3212-1)의 일환으로 수행되었습니다.

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