Abstract
With enhanced awareness of energy conservation and environmental protection, more attention has been paid to the high moisture content of the filtration products used in the flotation process as commonly employed in coal preparation plants. In this paper, we choose fine coal (–0.5mm) samples obtained from the Xiqu Coal Preparation Plant in China as our research objective. Tests were performed under three different experimental conditions: direct pressure filtration, electrolysis pressure filtration, and electricity decompression filtration with different electrodes. Thus our aim was the evaluation of the impact of electrodes on the electrolysis-pressure-filtration effect on fine coal dewatering. The results of this study indicate that when the coal slurry concentration is 400g/L, and when the electrode is aluminum-aluminum (90V, 14min), we can achieve the best effect and the lowest moisture content of the filter cake, which is 10%. The electrolysis pressure filter has a high dewatering efficiency, an advanced technical index, requires little power consumption (obviously energy-saving), needs only a small amount of maintenance, and is stable and reliable in operation, Thus the electrolysis pressure filter is the most effective and economical processing equipment for fine coal dewatering and has prospects for broad application.
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