A comminution model parametrization for low consistency refining

作者：Berna Jorge Enrique Rubiano^*; Martinez D Mark; Olson James A

来源：Powder Technology, 2018, 328: 288-299.

DOI：10.1016/j.powtec.2018.01.031

• Wood pulp
• Low consistency refining
• Fibre shortening
• Comminution model
• Mechanical pulp

Fibre shortening is typically an unwanted morphological change during low consistency refining that degrades pulp. A comminution model parametrization was proposed to assess fibre shortening during the low consistency refining of mechanical pulps. Fibre length distribution data from before and after refining with a variety of pulp types, net-powers, feed flow rates, angular velocities and plate geometries was analyzed. The estimated parameters from the comminution model showed to have correlations with refiner gap: the cutting rate had an inversely proportional power-law relationship with the refiner gap; narrower gaps promoted fibre cutting at the middle of the fibre whereas wider gaps promoted a more uniform cutting. Plate geometry was also demonstrated to have a role in the fibre cutting location. The proposed parametrization was compared to other modeling works using the likelihood ratio test, showing that it is appropriate to describe the results reported.

• 出版日期2018-4-1