A study of the Use of Eucalyptus cameldulensis Wood in theProduction of Bleached Kraft Paper Pulp

The denficiency of cellulosic raw material in our country is an important impeding problem that
wood and paper industries are encountered with.Based on world-wide experiences, it has been proven that substitution of hard wood fast growing species can be a good alternative. Among these hard wood
fast growing trees Eucalyptus cameldulensis must be preferred due to acceptable growing ability in
Irans, provinces. In this study the possibility of using kraft E.cameldulensis pulp was investigated. The lab scale kraft pulp production was as follows: canstant parameters: cooking temperature 160, 170, L/W=5/1 and sulfidity 25%, variable parameters: Cooking time 3 hours. Active alkali 19% and 22%.
In the trial with the cooking time of 3 hours and active alkality of 19% the screen yield was 40.02%,
with a kappa number of 30.45, and it was chosen as the treatment with optimom cooking conditions.
The pulp produced was bleached whith oxygen. Physical and strenght properties of refined and
bleached eucalyptus pulp at 400,450 and 500 ml,csf freeness were determined. The pulp at 400 ml,csf freenesss was selected due to is higher hand sheet strength properties.