Sawdust (wood-sawdust)

Corn sawdust is a natural abrasive from the grinding and sifting of the corn cob. Coniex sells sawdust on pallets and in bags for the surface finishing sector.


The corn cob is made up of three parts: the heart and the periphery, where the kernels are found, make up the light part. A woody waist sandwiched between the heart and the periphery forms the hard part.

The granules obtained from the woody waist are characterized by an absence of dust, a high density and fluidity. It also has a hardness identical to iron and a good absorption capacity.

On the other hand, those obtained from the heart part and from the periphery are soft, of low density and have a very important absorption capacity, up to five times their weight in water.


These compounds are widely used in surface treatment, especially for drying parts. They are normally used in vibrating machines with internal resistances to heat the sawdust, since when it absorbs moisture from the parts, it increases in size and can become embedded in some part. part of the pieces to be dried. For this reason we use the heat of the resistances, these heat the compound, the water evaporates and the grain of sawdust returns to its initial state.

They can also be used for the polishing of metal or plastic parts by means of pastes that are impregnated in the grains and these, when in contact with the parts, produce this shine effect, currently this process is not widely used since to achieve good finishes are necessary many hours.

The hard part obtained from the crushing can also be used for pickling, for this process the grain has to be projected on the surface to be pickled with a certain speed and pressure.


Due to its great consumption in the world of surface treatment, there are different granulometries that are determined by numbers, the smaller the number, the smaller the grain, the most used are nº 2-3-4-5.