Nonwoven geotextiles to filter clayey sludge: An experimental study

Abstract A host of mining practices produce fine-grained mineral sludge, such as mature fine tailing from oil-sand extraction. These sludges are hard to dewater because of their high clay content and their low hydraulic conductivity. This paper describes pressure filtration tests in which eight different nonwoven geotextiles (GTXs) were used to filter high-clay-content sludges. The sludges were formulated by mixing kaolinite and silt to obtain eight different grain-size distributions (GSDs) with d 50 ranging from 3 to 55 μm and clay content ranging from 0% to 38% ( d

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