Analysis of abrasion mechanism of grinding media in a planetary mill with DEM simulation

2010 ◽  
Vol 21 (2) ◽  
pp. 212-216 ◽  
Author(s):  
Akira Sato ◽  
Junya Kano ◽  
Fumio Saito
2006 ◽  
Vol 19 (10) ◽  
pp. 984-994 ◽  
Author(s):  
R.Y. Yang ◽  
C.T. Jayasundara ◽  
A.B. Yu ◽  
D. Curry

2017 ◽  
Vol 54 (6) ◽  
pp. 377-383 ◽  
Author(s):  
Shosei Hisatomi ◽  
Sho Fukui ◽  
Mitsuaki Matsuoka ◽  
Yuki Tsunazawa ◽  
Chiharu Tokoro ◽  
...  

2007 ◽  
Vol 554 ◽  
pp. 59-64 ◽  
Author(s):  
Malgorzata Sopicka-Lizer ◽  
Marta Tańcula ◽  
Tomasz Pawlik ◽  
V Kochnev ◽  
E. Fokina

Nano-structured β-sialon precursor powders were obtained as a result of milling in a planetary mill with a high acceleration. Various mixtures of initial nitrides/oxides have been prepared as β-sialon precursor with low (0.4-1.0z) substitution and were milled in a planetary mill of acceleration 28g (TTD, Russia) with zirconia or silicon nitride balls for a various times (30-45 min). The resultant powder showed various extents of crystalline lattice deformation: smaller crystallites, dislocations, bumpy surface. The degree of lattice destruction was influenced by the milling time and grinding media, however various mixture components showed diverse susceptibility to deformation.


Author(s):  
Zixin Yin ◽  
Yuxing Peng ◽  
Tongqing Li ◽  
Zhencai Zhu ◽  
Zhangfa Yu ◽  
...  

The wear of lifter in ball mill directly affects the grinding efficiency and economic cost. However, how to evaluate the variation of wear process and predict the wear distribution of lifter is poorly developed. To this end, a laboratory-scale ball mill was used to evaluate the variation of wear process of the lifter in different milling conditions of mill speed, ball filling, grinding media size and shape. Besides, a wear prediction method was used to compare and validate the experimental results. The experimental results showed that the Abbott-Firestone curve can evaluate the lifter surface topography. The wear rate of the lifter specimen is increased first and then decreased with mill speed and grinding media size. Increasing ball filling will increase the wear rate, and the grinding media shape of ball has a maximum wear rate. The wear characteristics of the lifter specimen are consisting of impact pit, indentation, plastic deformation and scratch. Furthermore, the discrete element method (DEM) simulation showed that the wear behavior on the upper surface is higher than that on the side surface of the lifter. The DEM simulation with Archard wear model is an effective tool to investigate the wear distribution on the lifter, which is in good consistent with the wear behavior measured by the experiment.


2018 ◽  
Vol 14 (4) ◽  
pp. 41-48
Author(s):  
I V Milyukova ◽  
S V Sobyanin

The study of the agglomeration limit of quartz powder grinding at the AGO-2 planetary mill was carried out. For operation, several modes were selected, 3 basic modes with a coefficient of filling grinding media φ=0,5; 0,6; 07, as well as one additional mode with a filling factor φ=0,4 and a smaller proportion of quartz powder. The agglomeration limit for quartz during mechanical activation on AGO-2 is the average powder diameter of 1.5 µm, and the maximum value of the specific surface is 15,000 cm2/g. The paper proposes a method for calculating the energy intensity of the AGO-2 activator, by which it was possible to estimate the optimal mode of treatment of quartz to obtain ultrafine particles with a load factor φ=0,4 and a time of mechanical activation up to 60 seconds. Determination of the average size and specific surface area of the particles after mechanical activation was carried out by the method of gas permeability Of the pocket - Goat using the device PSH-11. Measuring the temperature of the mixture of grinding media and powder in the drum was made contact thermometer TK-5.09, equipped with a thermocouple 3V9-500.


Minerals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 55
Author(s):  
Simon Larsson ◽  
Juan Manuel Rodríguez Prieto ◽  
Hannu Heiskari ◽  
Pär Jonsén

Modeling of wet stirred media mill processes is challenging since it requires the simultaneous modeling of the complex multiphysics in the interactions between grinding media, the moving internal agitator elements, and the grinding fluid. In the present study, a multiphysics model of an HIG5 pilot vertical stirred media mill with a nominal power of 7.5 kW is developed. The model is based on a particle-based coupled solver approach, where the grinding fluid is modeled with the particle finite element method (PFEM), the grinding media are modeled with the discrete element method (DEM), and the mill structure is modeled with the finite element method (FEM). The interactions between the different constituents are treated by loose (or weak) two-way couplings between the PFEM, DEM, and FEM models. Both water and a mineral slurry are used as grinding fluids, and they are modeled as Newtonian and non-Newtonian fluids, respectively. In the present work, a novel approach for transferring forces between grinding fluid and grinding media based on the Reynolds number is implemented. This force transfer is realized by specifying the drag coefficient as a function of the Reynolds number. The stirred media mill model is used to predict the mill power consumption, dynamics of both grinding fluid and grinding media, interparticle contacts of the grinding media, and the wear development on the mill structure. The numerical results obtained within the present study show good agreement with experimental measurements.


AIChE Journal ◽  
2021 ◽  
Author(s):  
Yixiong Lin ◽  
Chen Yang ◽  
Cheolyong Choi ◽  
Wei Zhang ◽  
Kazui Fukumoto ◽  
...  
Keyword(s):  

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