Thermodynamic Evaluation of Sulfate-Roasting Process for the Vanadium Extraction from Korean VTM Ore

Youngjae Kim; Kyungsob Choi; Hyunsik Park; Kyeong Woo Chung

doi:10.7844/kirr.2022.31.2.49

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2022 Vol.31, Issue 2 Preview Page Next Page

Thermodynamic Evaluation of Sulfate-Roasting Process for the Vanadium Extraction from Korean VTM Ore 국내부존 VTM으로부터 바나듐 회수를 위한 황화배소 공정의 열역학적 평가

30 April 2022. pp. 49-55

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Abstract

In the present study, the thermodynamic evaluation of the sulfate-roasting process was conducted to extract vanadium from the Korean vanadium titano-magnetite ore. The leaching efficiency of vanadium and other impurities was analyzed for varying roasting temperatures and addition of Na₂SO₄. In the case of sulfate roasting, the roasting temperature was 200 ℃ higher than that previously observed Na₂CO₃ roasting. However, the higher leaching efficiency of vanadium and lower leaching efficiency of other impurities, such as aluminum and silicon, were observed. The high selectivity for the extraction of vanadium in sulfate roasting would result from the reaction mechanism between SO₂ gas and vanadium concentrate.

Keywords

Vanadium titanium-magnetite (VTM) ore

sulfate-roasting

vanadium

thermodynamic calculation

본 연구에서는 국내 부존 바나듐 광물인 포천 지역의 바나듐 함유 함티탄철석(VTM: Vanadium-bearing titaniferous magnetite)을 대상으로 하여, 바나듐 회수를 위한 황화 배소 반응의 열역학적 평가를 수행하였다. Na₂SO₄를 이용하여 황화 배소를 진행하는 경우, 배소 조건에 따른 배소 후 바나듐 및 불순물의 수침출 거동을 평가하고, 황화 배소 반응에 대한 메커니즘 규명을 위하여 열역학적 평가를 수행하였다. Na₂SO₄를 이용한 황화 배소의 경우 Na₂CO₃를 이용한 염배소 공정과 비교하여 반응 온도는 200 ℃ 정도 높았지만 바나듐 침출률이 높고 Al, Si 등의 불순물에 대한 낮은 침출률을 보였다. 바나듐만 선택적으로 수침출되는 황화 배소 반응의 특징은 기상의 SO₂ 가스와 정광내 바나듐간의 반응에 따른 반응 메커니즘에 기인하는 것으로 예상되었다.

키워드

바나듐 함유 함티탄철석

황화 배소

바나듐

열역학

References

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Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 31
No :2
Pages :49-55
Received Date : 2022-03-25
Revised Date : 2022-04-01
Accepted Date : 2022-04-01
DOI :https://doi.org/10.7844/kirr.2022.31.2.49

Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

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