Release analysis of coal fines: Evolution of the methodology and critical issues involved

Sahu, L and Bhattacharya, S and Dey, S (2019) Release analysis of coal fines: Evolution of the methodology and critical issues involved. Journal of the Southern African Institute of Mining and Metallurgy, 119(6) . pp. 595-606.

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An ideal procedure to determine the limits of flotation-based separation, as is the case with washability analysis for density separation, does not exist. Therefore, a procedure called release analysis, considered to be the counterpart of the washability process in density separation, was developed to evaluate the flotation characteristics of coal fines. Since flotation is a complex process it is necessary to know the maximum recoverable yield that could be achieved at a target ash level and what could be obtained by release analysis. Due to a number of limitations in the initial procedures, modifications were recommended by various researchers to generate an optimum separation curve. This paper presents a review of, and a discussion on, the chronological evolution of release analysis methodology over the decades. Notwithstanding the availability of a standardized release analysis procedure, such as BS 7530, the paper highlights the critical parameters involved in the procedures, such as coal type, feed characteristics, choice of reagents and dosage, operator bias, and design features of the flotation cell.

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:Release analysis; ideal procedure; advanced flotation washability; impeller speed; aeration rate;Scale flotation cell; air-flow rate; impeller speed; hydrophobicity
Divisions:Metal Extraction and Forming
ID Code:7960
Deposited By:Sahu A K
Deposited On:26 Sep 2019 15:00
Last Modified:04 May 2020 11:25
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