The ADDAMS Density Separation Process—known as Specific Gravity Separation—is a critical step in Seed and Grain processing that separates particles based on their bulk density (weight per unit volume). This technique is used after basic cleaning and is essential for upgrading seed quality by removing damaged, immature, infested, or non-viable seeds that may be similar in size and shape to good seeds but differ in weight.
How ADDAMS Density Separation Works:
- The process is typically carried out using a Gravity Separator (also called a Specific Gravity Table and Densiometric Table), which uses a combination of:
- Vibrations (to stratify the seeds into layers based on density)
- Inclination (to guide movement along the table)
- Airflow (to lift lighter materials)
- This results in heavier, viable seeds moving to one side of the table and lighter, inferior seeds moving to the opposite side for discharge.
Key Principles of ADDAMS Gravity Separator:
Heavier particles (healthy, mature seeds) sink to the bottom layer and move in one direction.
Lighter particles (broken, immature, insect-damaged seeds) stay in the top layer and are carried away in another direction.
The machine’s settings can be fine-tuned to suit different seed types and moisture conditions.
Components of an ADDAMS Gravity Separator:
- Feed hopper
- Oscillating deck (vibrating and inclined)
- Adjustable air blower
- Discharge outlets (for heavy, middling, and light fractions)
Benefits of an ADDAMS Gravity Separator:
- Improves seed purity, vigor, and germination rate
- Removes contaminants that size-based methods can’t separate
- Essential for certified seed production
- Adds commercial value by producing uniform, high-quality lots
Typical Applications of an ADDAMS Gravity Separator:
- Gravity Separation of Cereals (wheat, barley, oats)
- Gravity Separation of Pulses (peas, lentils)
- Gravity Separation of Oilseeds (canola, sunflower)
- Gravity Separation of Vegetables and Specialty Seeds
Applicable Industries of an ADDAMS Gravity Separator:
- Grain Food Processing Lines.
- Pulses Food Processing Lines.
- Oil Seed Food Processing Lines.
- Grain Feed Processing Lines.
- Grain Malt Processing Lines.
- Field Seed Processing Lines.
- Forage Seed Processing Lines.
- Grass Seeds Processing Lines.
- Vegetable Seeds Processing Lines.
- Nuts Processing Lines.
The ADDAMS De-Stoner Separation Process is a specialized method in Seed and Grain processing used to separate heavy impurities such as stones, metal fragments, glass, and soil clods from the seed lot. These contaminants are typically similar in size to the seeds but significantly denser, making size-based cleaning ineffective. De-stoning is essential for ensuring product safety and quality and protecting processing equipment.
How the ADDAMS De-Stoner Separation Process Works:
- A De-Stoner machine operates on the principle of gravity and airflow, using a vibrating deck and air suction or pressure to stratify the materials:
- Vibration and airflow cause the seed mixture to become fluidized on a perforated deck.
- Due to deck inclination and vibration, heavier particles (stones, metal, clods) sink to the bottom and move in one direction.
- Lighter particles (good seeds) float upward and move in the opposite direction, exiting through a separate outlet.
Key Components of ADDAMS De-Stoner Separation:
- Feed Hopper – regulates material input.
- Vibratory or Oscillating Deck – usually tilted and perforated.
- Air Blower and/or Suction Fan provides adjustable airflow to fluidize the material.
- Stone and Seed Outlets – separate discharge points for heavy and light fractions.
Benefits of ADDAMS De-Stoner Separation:
- Removes high-density contaminants that are missed by air-screen or size graders.
- Improves product safety for food-grade processing.
- Prevents equipment damage downstream in milling or packaging.
- Enhances seed quality for both consumption and planting purposes.
Typical Applications ADDAMS De-Stoner Separation:
- De-Stoning of Cereals (wheat, barley, oats)
- De-Stoning of Pulses (peas, lentils)
- De-Stoning of Oilseeds (canola, sunflower)
- De-Stoning of Vegetables and Specialty Seeds
- De-Stoning of Herbs & Leaves
Applicable Industries of an ADDAMS De-Stoner Separators:
- Grain Food Processing Lines.
- Pulses Food Processing Lines.
- Oil Seed Food Processing Lines.
- Grain Feed Processing Lines.
- Grain Malt Processing Lines.
- Field Seed Processing Lines.
- Forage Seed Processing Lines.
- Grass Seeds Processing Lines.
- Vegetable Seeds Processing Lines.
- Nuts Processing Lines.
