The Water Leaching Behavior of Vanadium from a Salt-roasted VTM Concentrate and the Preparation of High-concentration Vanadium Solution

Yujin Park; Rina Kim; Min-seuk Kim; Ho-Seok Jeon; Kyeong Woo Chung

doi:10.7844/kirr.2022.31.2.56

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2022 Vol.31, Issue 2 Preview Page Next Page

The Water Leaching Behavior of Vanadium from a Salt-roasted VTM Concentrate and the Preparation of High-concentration Vanadium Solution VTM 정광 염배소 산물에 대한 바나듐 수침출 거동 분석 및 고농도 바나듐 용액 제조

30 April 2022. pp. 56-62

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Abstract

This study investigated the water leaching behavior of vanadium in Na₂CO₃-roasted vanadium-bearing titaniferous magnetite (VTM) concentrate. The magnetic concentrate and Na₂CO₃, mixed in a mass ratio of 4:1, were roasted at 1050 °C, kept for 3 h, and ground to a size of D₅₀ = 48.79 µm using a rod mill. The effects of leaching temperature and pulp density on water leaching were then investigated. The results show that the vanadium leaching efficiency decreased to 90.4%, 88.2%, and 83.8% as the temperature increased to 25, 55, and 85 °C, respectively, whereas it remained almost constant 90.4%, 87.0%, and 87.0% as the pulp density increased to 10, 50, and 100 w/v%, respectively. Based on the preliminary leaching results, multi-stage leaching was conducted with the experimental conditions of 25 °C, 100 w/v%, 300 rpm, and 1 h. The vanadium concentration in the final leaching solution was determined as 16.20 g/L after four stages of leaching. Thus, a high-concentration sodium vanadate solution was prepared by multi-stage leaching.

Keywords

Vanadium

VTM

Salt roasting

Water leaching

Multi-stage leaching

본 연구에서는 탄산나트륨(Na₂CO₃)을 사용하여 염배소한 함바나듐 티탄철광(VTM)으로부터 바나듐의 수침출 거동을 고찰하였다. 자력선별 된 정광과 Na₂CO₃를 질량비 4:1로 혼합한 후 1050 °C, 3시간 조건에서 염배소하고 로드밀을 사용해 D₅₀=48.79 µm로 분쇄하여 연구에 사용하였으며 침출 온도와 광액 농도를 수침출 영향인자로 선정하였다. 연구 결과, 온도가 25, 55, 85 °C로 증가할수록 바나듐의 침출율은 90.4, 88.2, 83.8%로 감소하였으며 광액 농도 10, 50, 100 w/v%에 따른 바나듐 침출율은 각각 90.4, 87.0, 87.0%로 변화가 크지 않았다. 이를 바탕으로 25 °C, 100 w/v%, 300 rpm, 1시간의 조건에서 다단 침출을 수행한 결과, 총 4단 침출 후 최종 침출액의 바나듐 농도는 16.20 g/L로 분석되었다. 따라서 다단 침출을 통해 고농도 소듐바나데이트 용액의 제조가 가능하였다.

키워드

바나듐

함바나듐 티탄철광

염배소

수침출

다단침출

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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 :56-62
Received Date : 2022-03-28
Revised Date : 2022-04-08
Accepted Date : 2022-04-11
DOI :https://doi.org/10.7844/kirr.2022.31.2.56

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

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