The CLASSTONER is a dry stoner and a grain classifier in one single machine. It features two stacked decks that are
easily removed and can be enclosed in the vacuum chamber.
A special feeding device that does not require any adjustment, spreads the product over the entire width of the upper deck.
This upper deck consists of three adjacent sieve sections each having different size openings.
The oscillating movement provided by two vibrating motors, combined with the upwards action of the air flow ensures proper
stratification of the product by gravity.
Consequently the heavy grain and the stones remain on the sieve while the light fraction floats over the surface of the
upper sieve and is delivered from the machine.
This allows for the air flow to carry out the first separation which is the removal of the light husks, straws and dust. The arrival of stock at the second and third sieves, after the prestratification has taken place on the first sieve, marks the beginning of the discharge of stones from the heavy product over the lower deck, where stones and particles of earth are directed upwards to the discharge.
The heavy grain fraction is discharged from its proper outlet of the lower deck while the light grain fraction is discharged from the outlet at the upper deck.
The light grain fraction (depending on the mesh opening of the second and third sieve) can vary from 2-3 % up to 20 - 25% of the machine capacity.
The main advantages of the CLASSTONER are:
- Incorporates several separations in one machine, destoning
aspirating and concentrating of impurities.
- Saves floor space.
- Reduces energy and maintenance costs.
- Reduces installation costs.
- Can be used for cleaning and destoning of a wide variety of cereals grains and other seeds.
