关键词: 花岗岩, 骨料加工, 机制砂

Abstract: In order to respond to national policies，reduce natural sand and gravel mining，increase the production of manufactured sand and gravel，and achieve the purpose of protecting the ecological environment，a stone field in South China uses granite for construction to produce crushed stone aggregates and manufactured sand products. A dry-wet combination process of pre-screening-multi-stage screening and crushing-wet sand washing was proposed. The fine-grained mud powder is pre-screened by mud powder screening，and then three kinds of sand and stone aggregate products and stone powder are obtained by four-stage closed-circuit crushing and screening. At the same time，the by-product fine-grained mud powder and stone powder can be used as raw materials to enter the manufactured sand production line with the mining stripping material to produce manufactured sand. The tailings and mud powder can also be used as raw materials for porcelain making. Through this process，the utilization rate of ore and operation efficiency are improved，and the utilization of resources is maximized.

Key words: granite, aggregate processing, mechanism sand