METHOD FOR MANUFACTURING PULP FROM CLASSIFIED WOOD MATERIAL

摘要

The invention relates to a method for adjusting the fibrous properties of chemical, mechanical or chemi-mechanical pulp, for adjusting the uniformity of the properties and for decreasing any variation in quality. According to the method, raw wood material is used in the pulping process, which is selected on the basis of how high up the stem the raw wood material comes from. The raw wood material is classified by bolts at any stage in connection with the felling of the wood or in the plant or at any stage of the processing chain of the wood between the felling of the tree and the pulping process or the felling of the tree and the grinding or refining processes.