| abstract |
METHOD TO PRODUCE MECHANICAL PULP, AND USE OF MECHANICAL PULP PRODUCED. The present invention concerns a method for producing mechanical pulp, the method comprising: introducing the raw material of the mechanical pulp, refining the raw material in a first refining stage with the objective of forming the mechanical pulp, adjusting the pH of the mechanical pulp between 9 and 11 in a process step in which a first process delay is arranged, the first process delay being at least 0.5 hour, classify the mechanical pulp in an acceptable first load (A1) and a first rejected charge (R1), treat with ozone the first rejected charge (R1) whose pH at the beginning of the ozonation process is between 9 and 11, refine the first rejected charge (R1) ozonized in a second refining phase until at least one part of this belongs to a second acceptable charge, and combine the acceptable charges. The present invention also concerns the use of mechanical pulp. |