Dynamics of fines distribution in a white-water network

A dynamic model of a typical white-water network of a newsprint mill has be en developed to study the effect of disturbances on the fibrous material di stribution. The mass profiles show a progressive fines buildup in the wet e nd; the highest observed fines content is at the headbox. Low fines retenti on implies that fines are being continuously recycled back in the white-wat er. The effect of headbox fines oh retention has been modeled by using a li near function, the parameters of which were obtained by mass balance around the machine forming zone.