River pebble, granite, sandstone and limestone are common materials for sand making, which will produce more waste rock chips in the process of production and processing. The size of these debris is different, the content of 2.36-4.75mm and below 0.15mm is higher, while the content of 0.3-1.18mm is less. The stacking of waste rock chips affects the environment and takes up land resources. Processing waste rock chips for pulverizing can not only realize 100% utilization of resources, but also solve the problem of “sand shortage”.

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