METHODOLOGICAL APPROACH to STUDYING STRUCTURAL and MECHANICAL PROPERTIES of SUSPENSION of MAGNETITE NANOPARTICLES in DISPERSION
S. P. Ostapenko, A. S. Opalev
Mining Institute, Kola Science Center, Russian Academy of Sciences, Apatity, Russia
Keywords: Iron ore, magnetite, quartz, nanoparticles in dispersion, suspension, computer model, chain model, translational diffusion coefficient, viscosity, digital transformation
Abstract
For the computerization of studies aimed at improvement of processing technology of iron ore, the methodological approach is proposed to the analysis of structure and mechanical properties in suspension of magnetite nanoparticle dispersion. The approach involves the simulation modeling of motion of nanoparticle aggregates in liquid and the calibration of the model parameters using the experimental data on the viscosity dependence on the temperature and shear velocity. The structure of an aggregate of magnetite particles is analyzed, and the length and composition of a particle chain formed as a result of magnetic dipole-dipole interaction are determined. In terms of magnetite and quartz suspension, it is shown that as a consequence of internal rotation, the chain aggregate tangling takes place concurrently with the increase in the suspension viscosity in the presence of the opposite-charged particles.
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