Bluestone belongs to medium-low hardness sedimentary rock (Moh’s hardness about 3-4), the main component is calcium carbonate, which is widely used in the fields of construction, road and so on. Its crushing and sand making solution needs to be comprehensively designed according to the output demand, discharge specification and environmental protection requirements. The following are typical configurations and optimisation suggestions based on industry practice:
Process Flow Design
Basic Flow
Coarse crushing: bluestone raw material → vibrating feeder → jaw crusher (output ≤ 100mm stone).
Medium crushing: coarse crushed material → impact crusher (secondary crushing to ≤40mm).
Screening: Vibrating screen separates qualified materials from returned materials, and the returned materials are recycled for crushing.
Sand making: qualified material→iroller sand making machine (finished sand 0-5mm).
Cleaning: sand washing machine dewatering and dust removal→finished sand storage.
Optimised Solution
Bluestone crushing and sand making core equipment configuration
Primary crushing equipment
Jaw crusher
Jaw crusher: used for coarse crushing of large bluestone (feed size ≤1500mm), large crushing ratio, high capacity, can produce medium-sized stone (30-100mm).
Advantage: deep cavity design to increase production, wear-resistant parts to reduce maintenance costs.
Medium/fine crushing equipment
Impact crusher
Impact crusher: suitable for medium-hard materials, with both crushing and shaping functions, and even granularity (finished product size ≤40mm).
Sand Making Equipment
Roller type sand making machine
Roller type sand making machine: the finished product has rounded grain shape (0-5mm), reasonable grading, and the size of the discharged material is controlled by adjusting the roller spacing, with low energy consumption and simple maintenance.
Auxiliary equipment
Vibrating feeder: feed the material evenly to avoid overloading the equipment. Vibrating screen: multi-layer screening (2-4 layers), separating different specifications of finished products.
Sand washing machine: cleaning dust and impurities, improving the cleanliness of sand. Conveyor and dust removal system: belt conveyor connects the process, and bag type dust collector reduces dust pollution.
