OXIDISED WHITE LIQUOR IN AN OXYGEN DELIGNIFICATION PROCESS

摘要

The invention refers to a method for an integrated treatment of cellulosepulp. The method includes the steps: providingsaid cellulose pulp (1), providing a determined quantity of white liquor (2)including alkali and sulphur components, providingan oxygen-containing gas, oxidising (5) the sulphur components of the whiteliquor by the supply of a part of said gas in such a waythat at least a part of the sulphur is present in the form of sulphate,transporting the cellulose pulp having a certain kappa number toat least one mixing device (4), and supplying the oxidised white liquor fromthe oxidising step to the cellulose pulp, supplying a partof said gas to the cellulose pulp in said mixing device, mixing the cellulosepulp with the oxidised white liquor and said gas in saidmixing device, and transporting the cellulose pulp from said mixing device toa delignification reactor (6) for oxygen delignificationof said cellulose pulp, wherein the kappa number is reduced.