Use of rotor crushers in cylic flow technology in flux quarries

Abstract

1. The yield of fine fragments in the end product depends largely on the fragment-size composition of the blasted rock and the efficiency of preliminary screening in CFT systems with self-propelled crushing units fitted with rotor crushers. To determine the optimum fragment size for the blasted rock, we must observe the minimum fines yield in the end product. 2. Crushing of rock in rotor crushers to commercial fractions (0–130 or 0–80 mm) leads to marked overcrushing, and thus it cannot be recommended for the production of fluxes with limited fines contents. 3. It is rational to use rotor crushers in self-propelled crushing units in flux quarries, in conjunction with preliminary screening (such as that in the SDA-1000 system) followed by final crushing to the commercial fragment sizes in cone breakers.