Abstract: A roll end (30) for a roll, in particular for a heatable roll, in a paper or board machine or in a finishing machine is made by a powder metallurgy process in a mold (20) such that a duct system (10) for a heat transfer medium is formed in connection with the manufacture of the roll end. A hot isostatic pressing process in particular is used in the manufacture.

Abstract: A roll end for a roll, in particular for a heatable roll, in a paper or board machine or in a finishing machine has a whole formed by an end flange (31) and an axle journal (32), as well as a duct system (10) situated inside the material of the roll end (30), through which in a finished roll end a heat transfer medium is arranged to circulate from outside the roll through the axle journal (32) and the roll end (31) into bores of a roll shell and back. The roll end (30) is made by a powder metallurgy process in a mould (20) such that the duct system (10) for the heat transfer medium is formed in connection with the manufacture of the roll end by the powder metallurgy process. A hot isostatic pressing process in particular is used in the manufacture.

Abstract: The invention relates to a method for measuring the properties of a stack (15) that viscous molten salt forms on the bottom of a soda recovery unit (14) while black liquor is burned therein, and for measuring the corrosion of the materials of construction of the unit (14) during the operation thereof. In the method, at least one sensor means (11) is brought into contact with said stack (15), this sensor means (11) being electrically insulated from the soda recovery unit (14). In the method, at least some electrochemical properties and the temperature of said stack (15) are measured with this sensor means (11). The data measured with this sensor means (11) are fed to a measuring and data acquisition unit (12), and said measuring and data acquisition unit (12) is controlled by a control unit (13).