COAL AND MINERAL SLURRY DRYING METHOD AND SYSTEM
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United States of America Patent
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Mar 14, 2014
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Mar 15, 2013
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Abstract
The present invention provides methods and systems for reducing moisture in coal and mineral slurries, particularly slurries containing small diameter particles, using a granular drying material. The invention also relates to novel products and intermediates useful in connection with the process. The method and system reduced moisture by contacting the slurry with the granular drying material. The granular drying material is selected to be readily separated from the dried coal or minerals using a size separation technique such as a sieve screen. The granular drying material is the regenerated, preferably using a process involving heat exchange and cross-flow air. The granular drying material is preferably capable of regeneration and recycling in a continuous process with minimal attrition.
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