Effect of Compaction Pressure and Moisture Content on Post-Agglomeration Elastic Springback of Pellets
Abstract
:1. Introduction
2. Materials and Methods
- −
- Differences in the moisture content of the material have a significant impact on elastic springback.
- −
- Differences in the compaction pressure significantly affect elastic springback.
3. Results and Discussion
3.1. Statistical Analysis
3.1.1. Miscanthus
3.1.2. Silphium
3.1.3. Sida
3.1.4. Elastic Springback vs. Pressure and Moisture Content
3.1.5. Elastic Springback vs. Density and Durability
4. Conclusions
- These studies have shown the influence of compaction pressure and moisture on post-agglomeration elastic springback. Depending on the features of the material, the influence of compaction pressure and moisture is different. The analysis showed clear differences for all tested raw materials. This may be related to the biological structure of the plant itself and its chemical composition.
- Analysis of correlation values showed that elastic springback vs. durability correlation is absent for all the plants studied. For the correlation analysis of elastic springback vs. density, the correlation value depends on specific plants. The results showed that elastic springback clearly affects the density (for miscanthus and silphium). This information is very important to optimize the pellet production process.
- Areas of springback high value in the pattern of process parameters (P, MC) were determined, and these areas indicate directions for further research to minimize springback at these process parameters. In these zones, the influence of other factors such as temperature and degree of defragmentation should be studied.
- The appearance of elastic springback causes decrease of density. Therefore, material preparation processes and compaction process parameters must strive to minimize the elastic springback. This will result in an improvement of density and certainly not decrease of durability (there was no correlation between elastic springback and durability).
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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SS | df | MS | F Value | p-Value | |
---|---|---|---|---|---|
Intercept | 5905.110 | 1 | 5905.110 | 15,096.26 | 0.000000 |
Pressure | 39.057 | 3 | 13.019 | 33.28 | 0.000000 |
Moisture | 182.245 | 2 | 91.123 | 232.95 | 0.000000 |
Pressure × Moisture | 8.821 | 6 | 1.470 | 3.76 | 0.008861 |
Error | 9.388 | 24 | 0.391 |
SS | df | MS | F Value | p-Value | |
---|---|---|---|---|---|
Intercept | 6998.309 | 1 | 6998.309 | 24,931.12 | 0.000000 |
Pressure | 77.152 | 3 | 25.717 | 91.62 | 0.000000 |
Moisture | 31.750 | 2 | 15.875 | 56.55 | 0.000000 |
Pressure × Moisture | 8.794 | 6 | 1.466 | 5.22 | 0.001455 |
Error | 6.737 | 24 | 0.281 |
SS | df | MS | F Value | p-Value | |
---|---|---|---|---|---|
Intercept | 5809.750 | 1 | 5809.750 | 12,955.44 | 0.000000 |
Pressure | 47.081 | 3 | 15.694 | 35.00 | 0.000000 |
Moisture | 40.533 | 2 | 20.266 | 45.19 | 0.000000 |
Pressure × Moisture | 7.102 | 6 | 1.184 | 2.64 | 0.041374 |
Error | 10.763 | 24 | 0.448 |
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Styks, J.; Knapczyk, A.; Łapczyńska-Kordon, B. Effect of Compaction Pressure and Moisture Content on Post-Agglomeration Elastic Springback of Pellets. Materials 2021, 14, 879. https://doi.org/10.3390/ma14040879
Styks J, Knapczyk A, Łapczyńska-Kordon B. Effect of Compaction Pressure and Moisture Content on Post-Agglomeration Elastic Springback of Pellets. Materials. 2021; 14(4):879. https://doi.org/10.3390/ma14040879
Chicago/Turabian StyleStyks, Jakub, Adrian Knapczyk, and Bogusława Łapczyńska-Kordon. 2021. "Effect of Compaction Pressure and Moisture Content on Post-Agglomeration Elastic Springback of Pellets" Materials 14, no. 4: 879. https://doi.org/10.3390/ma14040879