Cleaning of nuts and oilseeds

Nuts and oilseeds are delivered to processors in different packaging and container sizes. In addition to cardboard packaging, jute or plastic bags are used, which means that strings from the bags also get into the product stream. In a first process step, these are removed by air classification.

In the subsequent processing step, coarse impurities such as pieces of wood and leaves are separated, as is the removal of very fine components such as sand or insect fragments.

In addition to the above-mentioned impurities with a low specific gravity, impurities with a high specific gravity such as metals or stones can also be contained. Two further cleaning steps are therefore required.

Either magnetic separators or metal separators are used to remove ferritic or metallic foreign matter. In the final cleaning step, other contaminants with a high specific weight, such as stones, are removed with the help of a heavy-particle separator.