Gravity Separation/Destoning

Gravity separation is a key process for removing soil, stones and glass and other heavier contaminants. It can also be useful for removing lighter contaminants and damaged/shrivelled grains.

Goods are shaken on a sloping mesh table, the shaking process is designed to drive goods up to the top of the slope, a large fan blows air through the mesh table and this causes the lighter fractions to ride on the air currents and drift to the bottom of the slope. The goods therefore end up segregated according to their specific gravity.

Some of the more common products that we process for gravity separation/destoning include:

• Adzuki Beans
• Alubia Beans
• Amaranth
• Baby Green Lima Beans
• Baby White Lima Beans
• Beluga Lentils
• Black Barley
• Black Kidney Beans
• Black Lentils
• Black Quinoa
• Black Rice
• Black Turtle Beans
• Blackeye Beans
• Borlotti Beans
• Brown Beans
• Brown Linseed
• Brown Rice
• Buckwheat
• Bulgur Wheat
• Butter Beans
• Channa Dall
• Chia Seed
• Chick Peas
• Coriander
• Cracked Freekeh Wheat
• Cranberry Beans
• Cumin Seed
• Dark Red Kidney Beans
• Dark Speckled Green Lentils
• Desi Chickpeas
• Flageolet Beans
• Freekeh Wheat
• Golden Linseed
• Great Northern Beans
• Green Lentils
• Gunga Peas
• GWS Pumpkinseed
• Hemp Seed
• Large Lima Beans
• Maize
• Maple Peas
• Marrowfat Peas
• Millet
• Mung Beans
• Mung Dal
• Peabeans
• Pearl Barley
• Pearled Spelt
• Pinto Beans
• Popcorn
• Poppy Seed
• Pumpkinseed
• Red Quinoa
• Red Rice
• Red Split Lentils
• Rosecocoa Beans
• Rye Berries
• Sorghum Seed
• Spelt Wheat
• Sunflower Seed
• Toor Dall
• Urid Beans
• Urid Dall
• Wheat Berries
• White Quinoa
• White Rice
• White Maize
• Whole Brown Lentils
• Yellow Split Peas

To view the full range of processing services that we offer, click here.

If you would like further details on our gravity separation/destoning process, or to discuss your processing requirements then please do get in touch on 01223 834100 or hello@granta.uk.com.