METHOD OF ACTIVE IMPACT CRUSHING OF MINERALS AND AN ACTIVE IMPACT CRUSHER

摘要

A method of impact crushing of material includes the following steps: the material is fed to an actuator destructing the material and forwarding pieces of the material towards reflecting elements. Small material pieces are impacted by the first reflecting element and large material pieces are impacted by the second reflecting element. Impact surfaces of the reflecting elements are substantially normal to the movement directions of the pieces during the impacts. A time interval between the impacts made by the reflecting elements is defined with use of the expression Δt=(0.7 . . . 1.3)(R₁/V₁−R₂/V₂), where R₁ and R₂ are distances from a place of forwarding the pieces by the actuator to the places, where the first and second reflecting elements impact the pieces, correspondingly, V₁ and V₂ are average velocities of the pieces forwarded towards the first and second reflecting elements, correspondingly.;An impact crusher is disclosed as well.