In the construction of expressway (highway), there are very high requirements for the shape and grading of concrete sand and gravel aggregates, especially for the needle and flake content in basalt (diabase) gravels, and the cone breaking or impact crushing processing technology can no longer meet the requirements. Our company has introduced a new crushing and screening process that can well meet the technical requirements of the new sand machine for crushing and shaping; The new sand machine is a necessary equipment for producing high-performance concrete aggregates and high-quality stones, which can fully meet the technical requirements for producing high-performance concrete aggregates for expressways.
Artificial sand and stone aggregate process: materials (limestone, marble, granite, etc.) enter the coarse crushing equipment through the feeder, and the coarse crushed aggregate enters the fine crusher for secondary crushing and shaping, and then is transported to the screening device through the belt conveyor for aggregate grading. After meeting the required finished aggregate, excess and unqualified aggregate is sent to the sand making equipment, The aggregate crushed by the sand machine is transported by the belt conveyor and then enters the screening workshop for grading. In this way, the intermediate crushing device, sand making device and screening device form a closed cycle to process the incoming materials into the required finished sand aggregate. Artificial sand and gravel can be produced by dry method or wet method. In consideration of environmental protection and water conservation, the sand can be classified by air separator, which is conducive to environmental protection and the adjustment and control of stone powder content at any time.