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With the continuous application of new research methods such as numerical simulation, the research on superfine pulverization has gone from simple experimental research to grinding mechanism and microscopic dynamics in the mill, which is of great significance for the development and design optimization of ultrafine pulverizing equipment. .
Zhang Guowang simulated the flow field of the ultra-fine agitating mill using the computational fluid dynamics software CFX. Xiao Xiao et al., Compared the influence vertical stirred ball mill and the magnetic iron ore dissociated. The laser particle size analyzer, mineral dissociation analyzer (MLA) and scanning electron microscope were used to measure the particle size distribution, mineral dissociation degree and the cross-sectional morphology of the newly formed -38 μm mineral particles. The results show that the agitating mill can selectively increase the dissociation degree of magnetite. The magnetite dissociation degree of the newly formed -38μm product in the agitating mill is 8.1% higher than that in the ball mill. Zhang Renbing et al. The energy consumption of ultrafine grinding of GN8 mill based on grinding dynamics was studied. Using quartz as raw material, the mathematical relationship of the input energy E of the mill under different impeller speeds was studied.
Hao Jingru et al. used finite element fluid dynamics analysis software to calculate the fluid field in the squirrel-cage grinding mill. The results show that there is an annular region with high velocity gradient inside and outside the radial direction of the agitator rotor, which is the main working area with significant grinding effect.
ALHinde et al. [217] proposed a simplified method to simulate the comminution process. When X.Ye et al studied the effect of cleaning the surface of a bead mill, Hui copper ore and the flotation effect on later produced, the thickness of the particles on the recovery recovery need to add additional collector. Matt Sinnott et al. conducted a pilot-scale vertical mill with a screw stirrer and a rod stirrer by means of DEM. The medium flow state, energy absorption rate and distribution, equipment wear, related flow structure, mixing and transmission efficiency were analyzed. Alex jankovic et al. studied the effect of agitated mills on the particle size distribution of a product through extensive laboratory and semi-industrial experiments. By pulverizing the ore ultrafinely to 20 μm or less, a product having a narrower particle size distribution than that of the ore can be obtained.
CTJayasundara et al. [222] used the numerical simulation method of DEM to study the flow state of different characteristic media in the mill for a simplified horizontal agitating mill with only filling medium. The flow state of the medium in the mill is analyzed from the velocity distribution, spatial distribution, collision frequency, collision strength and energy consumption of the driving medium. Matthew D. Sinnott et al. used the DEM simulation method to study the influence of the shape of the medium in the spiral vertical stirring mill on the flow state and energy utilization of the medium. In the case of simulation using differently shaped media (spherical and block media), the difference in medium transport, stress distribution, energy dissipation and wear in the agitator mill is obtained.
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