Granulometric analysis and separation options of dry sawdust exhausted from narrow-kerf frame sawing machines

This paper presents granulometric analyses of dry pine sawdust produced by narrow-kerf frame sawing machine, type PRW-15, in the process of longitudinal sawing of wood, and dry spruce sawdust produced by narrow-kerf frame sawing machine, type CLASIC 150/200, in the process of longitudinal re-sawing of spruce wood. The dry sawdust is a polydisperse bulk material with grain dimensions ranging between 84.7 µm and 28.2 mm. In view of the shape of grains, coarse and medium coarse fractions of dry sawdust mostly consist of fibrous grains. The fine fraction consists of isometric grains - cube shape. The analyses of conditions of separation of dry spruce and pine sawdust in separators and filters shows that battery separators with elements T4/630 and filters are suitable for the separation of sawdust produced in re-sawing operations of wood carried out with narrowkerf frame sawing machines, type CLASIC 150/200 and PRW 15.