Operation Analysis of a SAG Mill under Different Conditions Based on DEM and Breakage Energy Method
Abstract
:1. Introduction
2. Simulation Principle Characteristics
2.1. Discrete Element Method
2.2. Hertz–Mindlin with Bonding
2.3. Breakage Model
3. SAG Model and Simulation Scheme
3.1. SAG Mill Model
3.2. Parameter Settings
3.3. Simulation Scheme Design
4. Simulation Results Analysis
4.1. Single Parameter Case Analysis
4.2. Mixed Parameter Case Analysis
5. Conclusions
Author Contributions
Funding
Acknowledgments
Conflicts of Interest
References
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Symbol | Description | Value | Symbol | Description | Value |
---|---|---|---|---|---|
Impact breakage parameter used in the calculation of the t10 | 0.051 | Impact breakage parameter used in the calculation of the t10 | 60.4 | ||
Maximum particle size fracture energy (J/kg) | 44.9 | Median particle size (mm) | 4.3 | ||
Fitting parameters of fracture energy | 1.28 | Minimum particle size for breakage (mm) | 10−2 | ||
Standard deviation of the fracture energy | 0.46 | Minimum collision energy (J) | 10−4 | ||
Damage constant | 3.0 |
Type of Acation | Coefficient of Restitution | Static Friction Coefficient | Rolling Friction Coefficient |
---|---|---|---|
Rock–Rock Collisions | 0.3 | 0.65 | 0.05 |
Rock–Steel Collisions | 0.5 | 0.4 | 0.05 |
Rock–Mill Collisions | 0.5 | 0.4 | 0.1 |
Steel–Steel Collisions | 0.75 | 0.35 | 0.1 |
Steel—Mill Collisions | 0.75 | 0.5 | 0.2 |
Material | Density (kg/m3) | Shear Modulus (Pa) | Poisson’s Ratio |
---|---|---|---|
Steel ball | 7800 | 7 × 1010 | 0.3 |
Rock | 2600 | 1 × 107 | 0.3 |
Lining board | 7200 | 6.8 × 1010 | 0.3 |
Case | Other Parameter Settings | Research Parameter |
---|---|---|
1 | 30% of mill volume, 10% steel ball ratio | Mill speed ratio |
2 | 75% critical speed of mill, 10% steel ball ratio | Fill level ratio |
3 | 75% critical speed of mill, 30% of mill volume | Steel ball ratio |
Case | Mill Speed Ratio (%) | Fill Level Ratio (%) | Steel Ball Ratio (%) |
---|---|---|---|
0 | 80% | 15% | 10% |
1 | 75% | 15% | 10% |
2 | 85% | 15% | 10% |
3 | 80% | 10% | 10% |
4 | 80% | 20% | 10% |
5 | 80% | 15% | 6% |
6 | 80% | 15% | 14% |
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Xie, Q.; Zhong, C.; Liu, D.; Fu, Q.; Wang, X.; Shen, Z. Operation Analysis of a SAG Mill under Different Conditions Based on DEM and Breakage Energy Method. Energies 2020, 13, 5247. https://doi.org/10.3390/en13205247
Xie Q, Zhong C, Liu D, Fu Q, Wang X, Shen Z. Operation Analysis of a SAG Mill under Different Conditions Based on DEM and Breakage Energy Method. Energies. 2020; 13(20):5247. https://doi.org/10.3390/en13205247
Chicago/Turabian StyleXie, Qiyue, Caifengyao Zhong, Daifei Liu, Qiang Fu, Xiaoli Wang, and Zhongli Shen. 2020. "Operation Analysis of a SAG Mill under Different Conditions Based on DEM and Breakage Energy Method" Energies 13, no. 20: 5247. https://doi.org/10.3390/en13205247