DRY STONE SEPARATOR
(DOUBLE)

Stone separation by specific gravity and dynamic vibration

Specially designed to remove stones, glass and high-density foreign matter that threaten product quality and the safety of downstream machines on grain and pulse processing lines. This high-engineering machine delivers flawless separation on all granular materials — wheat, barley, maize, chickpea, bean, anise, thyme, sesame, rice and hazelnut. Twin execution (two working units within the footprint of one machine).

WORKING PRINCIPLE

Vibro-motor-driven feed — homogeneous surface distribution: product entering the machine is spread completely homogeneously and evenly across the specially woven high-strength steel-wire screen surface by the linear oscillating motion created by twin vibro-motors. Built-in aspirator and fluidised (“boiling”) bed: the integrated internal aspirator applies a continuous air stream upward through the screen surface; this air lightens the product’s specific gravity and keeps it suspended (fluidised) on the screen. Reverse stone discharge — density-based separation: the lightened, fluidised kernels flow gravitationally down the screen’s incline, while the denser stones settle onto the steel wire; the special weave geometry (weft) of the wire delivers upward mechanical impacts to the stones, making them climb against the product flow and be ejected from the system.

KEY ADVANTAGES

• Versatile product handling: The machine works successfully not only in wheat and flour milling but also across all pulses (chickpea, bean, lentil), oilseeds (sesame) and nuts (hazelnut).

• Practical visual adjustment (plexiglass): Sturdy transparent plexiglass covers let the fluidising motion of the product on the screen be clearly observed from outside during operation, so the air flow and vibration level can be set error-free.

• Modular models and capacities: Various industrial types and models are available, optimised for different plant sizes and capacity requirements.

ENGINEERING NOTE

The success of this system rests on flawless synchronisation of aerodynamic lift and mechanical vibration. With the controlled pressure differential created by the internal aspirator, even a precise weight difference between grain and stone is turned into flawless separation.