| 摘要 |
<p>The processing comprises screening for dividing the pulp into an accept and a reject fraction, of which the reject fraction constitutes 10-40%. The reject fraction is dewatered, impregnated with sodium sulphite and preheated with steam. Thereafter refining is carried out under pressure and steam development. Only this steam is used for preheating the reject fraction. After the refining, so-called latency-treatment is carried out whereafter the reject fraction is returned to the mechanical pulp, possibly via additional screening.</p> |
