Short-process low-energy-consumption system and method for preparing high-quality gravel aggregate from hard rock

The invention relates to a short-process low-energy-consumption system technology for preparing high-quality gravel aggregate from hard rocks and a method using the short-process low-energy-consumption system technology, the system mainly comprises an ore pre-crushing unit, a soil removal and wet-process sand making unit and a high-quality aggregate preparation unit, and the pre-crushing unit comprises a hard rock coarse crushing unit, a pre-screening unit and an intermediate crushing unit; a gyratory crusher or a jaw crusher can be selected for rough crushing of hard rocks according to the production scale, and the soil removal and wet sand making unit comprises a high-frequency vibration soil removal screening machine, a grinding sand making machine, a vibrating screen, a machine-made sand washing system, a sewage treatment system and the like. The high-quality aggregate preparation unit comprises a sand and stone grinding machine, a coarse aggregate screening machine, a machine-made sand screening machine,