Destoners

The basic principle involves flowing dry material over an inclined, vibrating, screen covered deck. The steady air flow holds the material in stratified flotation. The lighter material stays in the upper strata as it flows down the inclined vibrating deck with screens. The heavier material, such as stones, coarse sand, glass, metal, etc., travels up the inclined vibrating deck.

Destoners are placed in many different locations in a cleaning system, both before and after cleaners and gravity separators. Destoning is not only used as a means of eliminating contaminants to improve the purity of the product, but is also essential to remove stones to eliminate excessive wear on all types of grinding mills, flaking machines, etc.

Air is then dispersed through the deck and product where the separation begins. The steady air flow holds the lighter product in stratification as it advances down the inclination of the vibrating deck. The product is then directed toward the discharge end of the deck where the finished product is collected and often needs no further refinement. Forsberg destoners are known for their remarkably fast and thorough separation of heavy foreign material removal. Right now they are working throughout the world on spices, chemicals, coffee, peanuts, cereals, beans, wheat, minerals, and numerous other products.