Structural Design and Parameter Analysis of Coal slurry Crusher

The physical characteristics of low-moisture coal slime—marked by a low Proctor hardness (～1) and weak shear resistance—are analyzed to assess its crushability. A comparative evaluation of jaw crushers (low efficiency), hammer crushers (prone to adhesion), and toothed roll crushers supports the selection of a shear-dominant double-tooth roll crusher. The design integrates anti-adhesion comb-tooth structures and a spiral tooth-roll configuration. A processing capacity model is developed by introducing a void-filling coefficient (K = 0.2) and single-pass crushing efficiency (e = 0.75). Motor power parameters are calculated based on the shear strength of the coal slime. Results indicate that the effective working length of the rolls is 1.5 m, with staggered spiral teeth enhancing agitation and overturning. Theoretical throughput reaches 390.8 t/h, and a 90 kW motor (or dual 45 kW motors) is recommended. The system effectively addresses material adhesion and blockage issues, delivering uniform particle size suitable for blending with lump coal. Tailored for the properties of low-moisture coal slime, the crusher combines shear-based breaking with anti-adhesion design. It overcomes the limitations of conventional equipment and provides a scalable, practical solution for efficient coal slime crushing.