Mining industry

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Mining sludges are generally characterised by high abrasiveness and low organic content. The filter cake is usually porous and therefore, in addition to a belt press, a horizontal vacuum belt filter can also be used for continuous dewatering.

Filter belts for dewatering of mining sludge on a belt press

Filter belts with high abrasion resistance, high dewatering speed and high mechanical resistance to deformation and falding are suitable for abrasive mining slurries. Due to the low organic content of the sludge, which is easy to press, it is often possible to use spiral belts. An undeniable advantage of using spiral belts is the strong spiral joint, which does not protrude above the level of the fabric and therefore usually has a longer lifetime than the stainless steel clipper seam on woven belts.

Filter belts for dewatering of mining sludge on a horizontal vacuum belt filter

Filter belts for filtration of fine slurries on horizontal vacuum belt filters are equipped with either a conventional stainless steel clipper seam or a stainless steel clipper seam with a multifilament sealing. Another option is a stainless steel clipper seam with textile overlap, however this solution is not recommended as a standard, as the overlap can generally be a source of operational problems (lower filtration capacity in the ovelap area, higher belt thickness in the overlap area and associated operational problems, etc.). The belts are usually made of polyester or polypropylene. Polyester can be used for neutral or acidic suspensions while polypropylene can be used over the entire pH range. Polyester belts have higher mechanical strength and higher wear resistance than belts made of polypropylene.

Filter belts for vertical belt pressure filter

Filter belts for vertical belt pressure filters are made of robust polyester or polypropylene fabric and are fitted with a strong stainless steel clipper seam. The fabric is either composed entirely of multifilament fibers or a combination of monofilament and multifilament fibers.