Stone crushing and screening involves several stages to break down rocks into the desired aggregate sizes. These stages are performed using various crushers and screening equipment, each with a specific function.
1. Raw Material Collection and Loading
Rocks are collected from the quarry and transported to the crushing facility.
2. Primary Crushing
Rocks are initially broken into smaller pieces. Jaw crushers or impact crushers are typically used in this stage.
3. Secondary Crushing
Smaller rocks are further reduced in size. Cone crushers or secondary impact crushers are commonly used for this step.
4. Tertiary Crushing
The rocks are crushed to finer sizes. This stage involves the final size reduction, producing high-quality aggregates. Tertiary crushers are used here.
5. Screening (Classification)
Crushed rocks are classified according to size using screening machines. Vibrating screens or rotary screens are used.
6. Washing (Optional)
Dirty stones are cleaned using washing equipment, especially important for producing aggregates for concrete and asphalt.
7. Storage and Distribution
Final products are stored and later distributed according to their intended use.