Removing fines from crushed stone usually involves a process of screening and washing. Here are the common steps:
Screening: Use a vibrating screen to separate fine particles from larger stone pieces. The screen will have different sizes of apertures, allowing you to sort out the fines effectively.
Washing: If the screening doesn’t remove all fines, washing the crushed stone can help. This can be done using a wash plant, which typically consists of a hopper, screen, spray bars, and a sand screw or other dewatering device.
Air Classification: This method uses air to lift fines away from larger particles. It’s less common but can be effective, particularly in dry conditions where water use is a concern.
Cycloning: In this process, water and crushed stone are fed into a cyclone, where centrifugal forces help to separate the fines from the larger materials.
Settling Ponds: Sometimes, the washed fines are directed to settling ponds where water can evaporate or be recycled, leaving behind finer material.
Mechanical Scrubbing: In some cases, mechanical scrubbing machines can help to remove adherent fines on the surfaces of the stone.
Ensure that the method chosen aligns with environmental regulations and resource availability.
