Abrasion is among the more critical factors affecting the useful life in operation of a filter cloth installed on a filter press. The mining and metal refining industry represents one of the more challenging processes in which solid-liquid separation is performed, due to aggressive chemical environment and for the physical nature of the suspended solids in the inlet sludge. Further crystallization of dissolved solids also contributes to the potential mechanical failure of the filter media. Abrasion is more likely to occur in correspondence to specific localized areas of the filter cloth. By the frame and bosses the cloth transitions from the filtering area to the non-filtering one. Such points of discontinuity are therefore the more exposed to abrasion and thus prone to mechanically fail due to prolonged wear effect. Over the years several technical options, ranging from textile-based reinforcements to surface coatings, have been promoted by filter cloth manufacturers and adopted by the market in various industries. Among their major drawbacks are the creation of an over-thickness that might not be accommodated within the equipment design or poor resistance to withstand aggressive chemical environment. In this article we demonstrate the effectiveness of BlueTes, a special aliphatic polyurethane resin developed by Testori as an impermeable and chemically resistant anti-abrasion coating. Comparative laboratory tests have been conducted on several samples....
Session: F1 - Enhancement of Filter Media by Surface Treatment
Day: 22 October 2019
Time: 13:00 - 14:15 h