Mineralogical Characteristics and Fundamental Study of Flotation for Molybdenum Ore

Oyunbileg Purev; Hyun Soo Kim; Chul-Hyun Park

doi:10.7844/kirr.2022.31.6.73

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2022 Vol.31, Issue 6 Preview Page Next Page

Research Paper

Mineralogical Characteristics and Fundamental Study of Flotation for Molybdenum Ore 몰리브덴광의 광물학적 특성 및 부선 기초연구

31 December 2022. pp. 73-80

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Abstract

This study investigated the mineralogical characteristics and basic flotation properties of domestic molybdenum ores. The source mineral of molybdenum was identified as molybdenite, and the main gangue minerals in the raw ore were silicate minerals. Copper, lead, and zinc were also found in trace amounts. Based on the results of basic flotation properties, molybdenite’s zeta potential showed negative charges in all pH ranges. The contact angle of molybdenite increased with pH, reaching a maximum of 74° at pH 9. In optimal conditions, the grade and recovery of the concentrate by unit flotation were MoS₂ 82.4% and 92.04%, respectively. Further investigation of the impurities in the concentrate revealed a sulfide mineral with surface characteristics similar to molybdenite and silicate minerals combined with molybdenite, which may degrade the quality of the concentrate. To improve the concentrate quality, we intend to control silicate minerals through regrinding and liberation and use column flotation to improve fine particle separation efficiency.

Keywords

Molybdenum

Mineralogical characteristic

Optical analysis

Flotation

Contact angle

본 연구에서는 국내 부존 몰리브덴광을 대상으로 광물학적 특성 및 부유선별 기초특성을 파악하였다. 몰리브덴의 근원광물은 휘수연석으로 확인되었으며 원광 내 주요 맥석광물은 규산염광물이었다. 구리, 납 및 아연 등은 극미량으로 나타났다. 부유선별 기초특성 결과, 휘수연석의 제타전위는 pH 전영역에서 음전하를 나타내었다. 휘수연석의 접촉각은 pH의 증가에 따라 증가하였고 최대값은 pH 9에서 74°을 나타내었다. 단위부선의 최적조건에서 정광의 품위와 회수율은 각각 MoS₂ 82.4%와 92.04%를 나타내었다. 정광내 불순물 조사결과, 정광의 품위를 저하시킬 수 있는 휘수연석과 유사한 특성을 보이는 황화광물, 그리고 휘수연석과 결합된 규산염광물이 관찰되었다. 따라서, 정광의 품위향상을 위해 재분쇄/단체분리 향상을 통한 규산염광물의 제어와 미립자광물 선별 효율을 높일 수 있는 컬럼부선등이 요구된다.

키워드

몰리브덴

광물학적 특성

광학분석

부유선별

접촉각

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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 :6
Pages :73-80
Received Date : 2022-11-30
Revised Date : 2022-12-09
Accepted Date : 2022-12-12
DOI :https://doi.org/10.7844/kirr.2022.31.6.73

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

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