Development and application of the ultra-high-pressure elastic pressing filter press

To achieve deep dewatering of coal slime and promote the energy-efficient advancement of coal slime pressure filtration technology, an innovative dewatering approach combining elastic filter plates with direct hydraulic cylinder pressing was designed. This methodology is grounded in the principle that increasing compression pressure effectively reduces moisture content in coal slime filter cakes. By integrating three core technologies—multi-cylinder pressing, embedded filter cloth installation, and ultra-high-pressure elastic compression—the GTY ultra-high-pressure elastic filter press was successfully developed and implemented at the Erlintu coal mine preparation plant. Through key technologies including direct hydraulic pressing and elastic frame-sealed extrusion, this filter press achieves a cake compression pressure of 10 MPa with cake thickness reaching 70 mm. Application results at Erlintu coal preparation plant demonstrate that this equipment can fully replace the original "membrane filter press + thermal drying" process. With a single-unit processing capacity exceeding 40 t/h and the ability to reduce filter cake moisture below 20.0%, it significantly enhances the heating value of coal slime products while delivering substantial economic benefits. The development of this ultra-high-pressure elastic filter press represents an innovation in coal slime pressure filtration technology, offering a new technical pathway for deep dewatering of coal slime.