An efficient process for recovery of fine coal from tailings of coal washing plants

Journal Article · Tue Jul 01 04:00:00 EDT 2008 · Energy Sources, Part A: Recovery, Utilization, and Environmental Effects

OSTI ID:21085118

Cicek, T; Cocen, I; Engin, V T; Cengizler, H ^[1]

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1. Dokuz Eylul University, Izmir (Turkey). Dept. for Mining Engineering

Gravity concentration of hard lignites using conventional jigs and heavy media separation equipment is prone to produce coal-rich fine tailings. This study aims to establish a fine coal recovery process of very high efficiency at reasonable capital investment and operational costs. The technical feasibility to upgrade the properties of the predeslimed fine refuse of a lignite washing plant with 35.9% ash content was investigated by employing gravity separation methods. The laboratory tests carried out with the combination of shaking table and Mozley multi-gravity separator (MGS) revealed that the clean coal with 18% ash content on dry basis could be obtained with 58.9% clean coal recovery by the shaking table stage and 4.1% clean coal recovery by MGS stage, totaling to the sum of 63.0% clean coal recovery from a predeslimed feed. The combustible recovery and the organic efficiency of the shaking table + MGS combination were 79.5% and 95.5%, respectively. Based on the results of the study, a flow sheet of a high-efficiency fine coal recovery process was proposed, which is also applicable to the coal refuse pond slurry of a lignite washing plant.

• OSTI ID: 21085118
• Journal Information: Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, Journal Name: Energy Sources, Part A: Recovery, Utilization, and Environmental Effects Journal Issue: 18 Vol. 30; ISSN 1556-7036
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
ASH CONTENT
COAL FINES
COAL PREPARATION
CONCENTRATORS
LIGNITE
MATERIALS RECOVERY
SEPARATION PROCESSES
TAILINGS