b'PULP REFININGAccurate pulp refining analysis with Mets Fibres renewed FORE tool By Markku Rimpilinen, Hube Helsinki, for Mets FibreProper pulp refining gives paper or paperboard the desired propertiesA B Cand can often produce cost savings,Statortoo. Mets Fibres Pulp Refining Audit service provides precise data on how to optimise pulp refining in order to achieve the best possible results. The FORE software used in the serviceRotorhas been updated: while some new features have been added to the tool, the basic functions remain unchanged.Fibres are collectingGrits facing eachGrits have passed by The Pulp Refining Audit service produces refining recommendationsto the grit edge of other - majoreach other, formation quickly and accurately, and it presentsthe rotor refining energyof the fibres for next the results and recommendationsdelivery to fibres sequence beginsclearly and graphically. A PulpRefining Audit is applicable for all fibreFigure 1. Refining Stages between grits.types, including mechanical pulps and mill broke. SPECIFIC RECOMMMENDATIONS BASED ON AThe FORE program itself contains data CALCULATION on the properties of the refiners and ADVANTAGES OF A REFINING AUDIT Refining audit always starts an analysisrefiner fillings used in the industry and The Pulp Refining Audit servicewith the FORE software. The FORE toolit can be updated if the customers focuses on analysing the refining lineis based on calculation models thatmachinery is not in the FORE library.performance and its suitability to refinehave been developed in universities the existing furnish for the particularand research institutions. Calculation of the available refining paper or board grade. power and refining intensity (SEL and The basic data needed in the analysisC-factor if applicable) are included inTo release the full potential of pulp, theinclude: the analysis. SEL (specific edge load) optimisation of refining lines enables: the auditDescription of the refining process is a widely used parameter describing Cost savings in refining energy Type of refiner and refiner fillingspulp refining. SEL is the intensity Cost savings in raw materials providesor blades used directed to the fibres from the rotor Improved dewatering andrecommendationsRefiner energyedge to the stator edge. The mechanical runnability for improvingMinimum and maximum flow inspection of the refiner is excluded Improved quality of paper or board the refiningFurnish consistency from the study.process andFibre typeAs a result, the audit providesend-productLength and coarseness of the An experienced technical manager runs recommendations for improvingquality as wellfibre used the analysis. The program combines the the refining process and end- as reducingTarget of refining data, calculates parameters describing product quality as well as reducing productionDesired characteristics of the finalthe refining and indicates how the pulp production costs. costs. product used in a given process is refined. WORLD PULP&PAPER 13'