Development and application of the ultra-high-pressure elastic pressing filter press
ZHU Shaohui
LI Jianzhong
WANG Xuemin
SHAO Xiao
WANG Weizheng
TIAN Liang
Abstract：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 hy-draulic cylinder pressing was designed.This methodology is grounded in the principle that increasing compres-sion pressure effectively reduces moisture content in coal slime filter cakes.By integrating three core technolo-gies—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 origin-al"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 fil-ter press represents an innovation in coal slime pressure filtration technology,offering a new technical pathway for deep dewatering of coal slime.
Keywords：coal slime dewateringultra-high pressure elastic pressing filter presspressing pressurehydraulic cylinder direct pressingelastic filter platefilter cake moisture
Publication Date：2025-04-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 38-43 )