Study on the Froth Flotation Behaviors for Low-rank Coal in East-Kalimantan,  Indonesia

Jeongyun Kim; Heeyoung Shin

doi:10.32390/ksmer.2020.57.6.554

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2020 Vol.57, Issue 6 Preview Page Next Page

Research Paper

Study on the Froth Flotation Behaviors for Low-rank Coal in East-Kalimantan, Indonesia 인도네시아 동칼리만탄 저등급 석탄의 부유선별거동 기초연구

31 December 2020. pp. 554-563

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Abstract

Despite the continuous decrease in coal consumption in developed countries, research on coal flotation processes for pretreatment is ongoing due to the deterioration of coal quality and the expansion of small-and medium-sized coal mines. This study attempts to investigate the possibility of applying the flotation process as pretreatment for low-rank and low-grade coal in Indonesia. Three types of collectors, three types of frothers, and one conditioner were used; the separation characteristics according to the coal particle size were also tested. As a result, in the experiment using fine coal with K-L reagent and α-terpineol, suitable separation effects were observed. However, the difference in ash content between floating and sinking products was not significant and the mass recovery rate was relatively low. This implies that it is very difficult to improve coal quality by applying a conventional flotation process.

Keywords

Indonesian coal

Low rank coal

Froth flotation

Collector

Frother

선진국을 중심으로 한 지속적인 석탄 사용량 감소에도 불구하고 석탄의 품질 저하 및 중소형 탄광 개발 확대로 인해 다양한 석탄의 전처리를 위한 부유선별 공정 연구는 지속적으로 이루어지고 있다. 본 연구에서는 인도네시아 저등급, 저품위 석탄을 대상으로 다양한 부유선별 기초 실험을 수행하고 그 결과를 분석함으로써 향후 전처리 기술로 부유선별 공정을 적용할 수 있는지 가능성을 알아보고자 하였다. 연구에는 3종의 포수제와 3종의 기포제, 그리고 1종의 조건제를 사용하였으며, 석탄 입도에 따른 선별 특성도 확인하였다. 실험 결과, K-L 시약과 α-terpineol을 이용한 미립 석탄 부유선별 실험에서 일부 양호한 선별 효과를 보였으나 전체적으로 부유산물과 침강산물의 회분 함량 차이가 크지 않고, 질량 회수율도 대부분 50% 이하로 비교적 낮게 나타나, 일반적인 부유선별 공정을 적용하여 품질을 향상시키기 매우 어려운 석탄으로 확인되었다.

키워드

인도네시아 석탄

저등급 석탄

부유선별

포수제

기포제

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Information

Publisher :The Korean Society of Mineral and Energy Resources Engineers
Publisher(Ko) :한국자원공학회
Journal Title :Journal of the Korean Society of Mineral and Energy Resources Engineers
Journal Title(Ko) :한국자원공학회지
Volume : 57
No :6
Pages :554-563
Received Date : 2020-11-16
Revised Date : 2020-12-10
Accepted Date : 2020-12-22
DOI :https://doi.org/10.32390/ksmer.2020.57.6.554

Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

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