A Stone Separator removes stones, mud balls, glass and other heavy impurities from grains such as wheat, rice, maize, pulses, barley, sesame, chickpeas and seeds. It works primarily on the difference in specific gravity/density between the grain and heavy impurities.
Common industry names
Stone Separator
Grain Destoner
De-stoner Machine
Gravity Destoner
Gravity Type Stone Separator
Suction Gravity Destoner
Paddy Destoner
Wheat Destoner
Grain Stone Removing Machine
Heavy Impurity Separator
Typical working principle
Grain enters through a controlled feeding system.
Vibrating/sieving action spreads the grain.
Air passes through the product bed.
Lighter grains float/move differently, while stones and other heavy particles concentrate separately.
Separate outlets discharge clean grain and stones
