A Parametric Study of Column Flotation for Fine Coal Cleaning
作者:
B. K. PAREKH,
A. E. BLAND,
J. G. GROPPO,
J. YINGLING,
期刊:
Coal Preparation
(Taylor Available online 1990)
卷期:
Volume 8,
issue 1-2
页码: 49-60
ISSN:0734-9343
年代: 1990
DOI:10.1080/07349349008905172
出版商: Taylor & Francis Group
关键词: Froth flotation;Column flotation;Fine coal cleaning;Parametric study;Coal beneficiation
数据来源: Taylor
摘要:
Recovery of fine coal is becoming an important and integral part ofcoal cleaning plants. The froth flotation technique is widely used for recovery of fine coals; however, the technique becomes inefficient when excessive amounts of ultra-fine clay material is present. The counter-current column addresses this problem by providing a stream of wash water to remove fine clays from the froth. The experimental results reported herein examine the effect of column operational parameters (feed rate, frother concentration, airflow, column height, pulp density and wash water) on cleaning of fine coal. The study was conducted using the Plackctt-Burman experimental design followed by a 23factorial design. The study identifies frother concentration, column height and airflow as the most significant parameters and enabled characterization of the magnitude and interaction of the effects. In general, for the same amount of frother concentration column flotation provided a lower ash clean coal product compared to the conventional flotation. The paper describes the test procedure, results and conclusions obtained.
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