Effect of a Dispersant Agent in Fine Coal Recovery from Washery Tailings by Oil Agglomeration (Preliminary Study)

World Multidisciplinary Earth Sciences Symposium 2017

Yasar, Ozüm^1 ; Uslu, Tuncay^1

Karadeniz Teknik Universitesi, Maden Mühendislii Bölümü, Trabzon, Turkey^1

关键词: Clean products;    Dispersant agent;    Dispersing agent;    Fine coal cleaning;    Matter recovery;    Oil agglomeration;    Process performance;    Process recovery;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/95/4/042057/pdf
DOI  :  10.1088/1755-1315/95/4/042057

来源: IOP

【 摘 要 】

Among the fine coal cleaning methods, the oil agglomeration process has important advantages such as high process recovery, more clean product, simple dewatering stage. Several coal agglomeration studies have been undertaken recently and effects of different variables on the process performance have been investigated. However, unlike flotation studies, most of the previous agglomeration studies have not used dispersing agents to minimize slime coating effects of clays. In this study, agglomeration process was applied for recovery of fine coals from coal washery tailings containing remarkable amount of fine coal. Negative effect of fine clays during recovery was tried to be eliminated by using dispersing agent instead of de-sliming. Although ash reductions over 90 % were achieved, performance remained below expectations in terms of combustible matter recovery. However, this study is a preliminary one. It is considered that more satisfied results will be obtained in the next studies by changing the variables such as solid ratio, oil dosage, dispersant type and dosage.