Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Experimental Design of Column Flotation for Recovery of High Grade Molybdenite

고품위 몰리브덴 회수를 위한 컬럼부선 요인설계

  • Hyun Soo Kim (Department of Advanced Energy Engineering, Chosun University) ;
  • Purev Oyunbileg (Department of Advanced Energy and Resources Engineering, Chosun University) ;
  • Chul-Hyun Park (Department of Advanced Energy Engineering, Chosun University)
  • Received : 2023.12.05
  • Accepted : 2023.12.13
  • Published : 2023.12.31
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Abstract

In this work, column flotation using factorial design was performed for recovering high-grade molybdenite concentrate. First, the flotation concentrate from Samyang Mining Plant was regrinded to a mean size of 165, 116, 46.7, and 38.4 ㎛ for an increase of the liberation degree. Tests were carried out for various variables affecting column flotation, and then the concentrates with molybdenite grade and recovery of 98.3 % and 95.28 % were obtained, respectively. Also, regression was performed using the statistical analysis program (SPSS 25) with the factorial design and experimental data on particle size, flow wash-water velocity and depressant that affect high grade. From the results, a model equation was derived to predict the molybdenite grade (MG) and recovery (MR) with the relationship between column flotation variables. Factors such as depressant concentration + wash-water velocity and particle size + depressant concentration + wash-water velocity were smaller than the significance level (0.05) and had a significant effect on the dependent variable, grade, and in the recovery model, only particle size and wash-water velocity factors affected the dependent variable, recovery.

본 연구에서 고품위 몰리브데나이트 정광회수를 위해 요인설계를 이용한 컬럼부유선별을 수행하였다. 먼저 삼양 마이닝 플랜트의 부유선별 정광의 단체분리 향상을 위해 평균 입도 165, 116, 46.7 및 38.4 ㎛로 각각 재분쇄하였다. 컬럼부선에 영향을 미치는 다양한 변수에 대한 실험을 수행하였으며 MoS2 품위와 회수율이 각각 98.3 %와 95.28 %인 정광을 얻었다. 또한, 고품위에 영향을 미치는 입도 크기, 세척수 속도 및 억제제에 관한 요인설계 및 실험 데이터를 확보하고 통계분석(SPSS 25) 프로그램을 이용해 회귀분석하였다. 결과로부터, 컬럼부선 변수들 간의 상관관계와 품위(MG) 및 회수율(MR)을 예측할 수 있는 모델식을 도출하였다. 억제제 농도+세척수 속도 및 입도 크기+억제제 농도+세척수 속도의 요인들은 유의수준(0.05)보다 작아 종속변수인 품위에 뚜렷한 영향을 주고 있으며 회수율 모형의 경우, 입도 크기와 세척수의 요인만이 종속변수인 회수율에 영향을 주었다.

Keywords

Acknowledgement

본 연구는 산업통상자원부(MOTIE)와 한국에너지기술평가원(KETEP)의 지원을 받아 수행한 연구 과제입니다(No. 20227A10100030).

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