In above shown application a washing drum,designed for 800t/h has been changed against KISA – doubleshaft logwashers for 400t/h each. Severely muddy crushing material with grain size 2-250mm has been charged. The washing effect, has been many times higher, compared with the washing drum. Additionally the water consumption decreased considerably. The continuous material feeding is done by a KISA – feed belt: an essential condition for good washing results.