Leaching of Molybdenite by Hydrochloric Acid Solution Containing Sodium Chlorate

Thi Nhan Hau Nguyen; Thi Thu Huong Nguyen; Man Seung Lee

doi:10.7844/kirr.2022.31.5.26

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2022 Vol.31, Issue 5 Preview Page Next Page

Research Paper

Leaching of Molybdenite by Hydrochloric Acid Solution Containing Sodium Chlorate NaClO₃를 함유한 염산용액으로 몰리브데나이트광의 침출

31 October 2022. pp. 26-33

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Abstract

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 °C, and treatment time of 60 min.

Keywords

molybdenite ore

oxidative leaching

hydrochloric acid

NaClO₃

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.

키워드

몰리브데나이트광

산화 침출

염산

NaClO₃

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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 :5
Pages :26-33
Received Date : 2022-08-16
Revised Date : 2022-09-21
Accepted Date : 2022-09-26
DOI :https://doi.org/10.7844/kirr.2022.31.5.26

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

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