Dynamics of contact of the suspension jet with an obstacle during grinding of plant polymers
https://doi.org/10.53374/1993-0135-2025-4-64-74
Abstract
It is known that the process of grinding fibrous polymers from coniferous and deciduous wood is very important in the technology of producing paper and cardboard. Knife and non-knife grinding methods are used for this purpose. From the practice of this process, knife grinding is used in the technology of obtaining the finished product in pulp and paper production in the vast majority of cases.
When using knife grinding, the main effect on the fiber is considered to be mechanical. At the same time, with an increase in the speed of rotation of the rotor of knife mills, hydrodynamic effects during the flow of fibrous suspensions in the working areas of knife machines begin to play a serious role in the process of grinding fibrous semi-finished products. It is still not clear at what speeds of movement of fibrous suspensions it is necessary to take into account the effect of hydrodynamic forces on the grinding process.
To solve this problem, the analysis of the contact of the suspension jet with an obstacle during grinding of plant polymers was carried out. The phenomenon of suspension contact during grinding is observed in both knife-free and knife installations. In knife machines, the slurry flows during the process come into contact with the inner surfaces of the rotor and stator, and especially they hit the surfaces of the working bodies of the mill.
In this regard, the calculation of the instantaneous impact of a suspension jet with an obstacle was carried out.
About the Authors
Yu. D. Alashkevich
Reshetnev Siberian State University of Science and Technology
Russian Federation
Russian Federation
31, Krasnoyarskii rabochii prospekt, Krasnoyarsk, 660037
A. V. Ushakov
Reshetnev Siberian State University of Science and Technology
Russian Federation
Russian Federation
31, Krasnoyarskii rabochii prospekt, Krasnoyarsk, 660037
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Review
For citations:
Alashkevich Yu.D., Ushakov A.V. Dynamics of contact of the suspension jet with an obstacle during grinding of plant polymers. Conifers of the boreal area. 2025;43(4):64-74. (In Russ.) https://doi.org/10.53374/1993-0135-2025-4-64-74
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