The ore crusher (double-roll crusher) is the ideal choice for medium-to-fine crushing of medium-to-low hardness brittle minerals,

offering both energy efficiency and particle size control advantages, particularly in the coal, building materials, and chemical industries.

1. Ore Crusher Working Principle

Two counter-rotating rollers (smooth or toothed surfaces) apply compressive and shear forces to the material, achieving “selective crushing.” The material is slowly compressed within the roller gap rather than subjected to high-speed impact.

2. Advantages

Uniform and controllable particle size: Roll gap can be adjusted via wedge devices or shims (typically ranging from 0.3–40 mm), resulting in low over-grinding rates (minimal dust) and suitability for applications demanding strict finished product particle size specifications (e.g., manufactured sand, chemical raw materials).

Low Pollution and Heat Loss: Minimal heat generation during compression. Ceramic roll surfaces prevent metal contamination, preserving original mineral properties (e.g., coal coking characteristics, ore composition).

Adaptability to sticky and wet materials: Compared to jaw or cone crushers, double-roll crushers demonstrate superior throughput for moisture-containing or viscous minerals (e.g., lignite, clayey ores) with reduced clogging tendencies.