Secondary Crushing: Achieving Premium Quality Aggregates

May 18, 2024
Secondary Crushing: Achieving Premium Quality Aggregates
The secondary crushing section is where raw crushed stone is refined into the high-quality aggregates our customers depend on. This stage consists of three interconnected crushing processes, each designed to progressively reduce particle size and improve shape.
The first process involves our two RC-54 HP 300 Cone Crushers from Cederapids, USA. These machines handle oversize material from the primary section and crush it again to produce fully reduced particles. A third cone crusher is planned to increase our capacity beyond 700 TPH.
Next in line is the 48S Style D Gyrasphere Crusher from Telsmith TP40, USA — a powerful gyratory reduction crusher that operates on a spring relief mechanism. This type of crusher is well-suited for handling hard, abrasive stone like gabbro without excessive wear.
The crushed material is then screened through our LJ series 3-deck screens from Cederapids, USA. These screens sort the output by particle size and route appropriately sized material to the final shaping stage, while oversized material is recycled back through the cone crushers.
The most critical step in our secondary section is the HP 600 Nordberg Barmac B9100 VSI from Metso, France. This vertical shaft impactor shapes the stone by removing sharp edges and producing a cubical aggregate that meets both BSI and ASTM international standards — a benchmark of quality in the industry.
