Method for producing mechanical pulp, and use of mechanical pulp produced

摘要

Method for producing mechanical pulp, and use of mechanical pulp produced.The present invention relates to a method for producing mechanical pulp, the method comprising: introducing the raw material of mechanical pulp, refining the raw material in a first stage refining with the aim to form the mechanical pulp, adjust the pH of the pulp mechanics between 9 and 11 A process step in which a first delay of the process is arranged.The first delay of the process being at least 0.5 hour, classify the mechanical pulp in a first load acceptable (A1) and a first load rejected (R1), treating with ozone to the first load rejected (R1) whose pH at the beginning of the ozonisation process is between 9 and 11.Refine the first load rejected (R1) ozonized in a second phase of refining until at least a part of belonging to a second load acceptable, and combine the loads are acceptable. The present invention also relates to the use of mechanical pulp.