Three main factors have created a resurgence of interest in using filter presses to dewater fine coal tailings. First, it has become harder to attain permits for new tailings dams, due to changes in regulation and permitting processes. This has caused mines to seek closed-loop dewatering solutions. Second, many mines are running out of space for additional tailings dams, or tailings dams do not fit well with the mine's expansion plans by preventing access to, or use of, mineable reserves. Third, in order to reduce operating costs by achieving drier cakes or using less chemicals, mines are looking at replacing belt presses with newer style filter presses that can often achieve a drier product while using less chemicals.
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