|
| DEM simulation and experimental study on flow and segregation of multi-sized particles in a rotary kiln |
| Received:March 21, 2021 Revised:April 26, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7511/jslx20210321001 |
| KeyWord:rotary kiln discrete element method size segregation multi-sized particles force chain |
| Author | Institution |
| 赵东昇 |
江苏科技大学 冶金与材料工程学院, 张家港 ;张家港江苏科技大学 产业技术研究院 精细冶金研究所, 张家港 |
| 邱家用 |
江苏科技大学 冶金与材料工程学院, 张家港 ;张家港江苏科技大学 产业技术研究院 精细冶金研究所, 张家港 |
| 居殿春 |
江苏科技大学 冶金与材料工程学院, 张家港 ;张家港江苏科技大学 产业技术研究院 精细冶金研究所, 张家港 |
| 孙健 |
扬州市职业大学 机械工程学院, 扬州 |
| 余水 |
江苏科技大学 冶金与材料工程学院, 张家港 ;张家港江苏科技大学 产业技术研究院 精细冶金研究所, 张家港 |
| 齐渊洪 |
钢铁研究总院先进钢铁流程及材料国家重点实验室, 北京 |
|
| Hits: 474 |
| Download times: 278 |
| Abstract: |
| In order to clarify the movement behavior and segregation mechanism of particles in a rotary kiln,the DEM simulations and experiments of the particle flow process under three filling sequences were carried out.It is shown that the particle flow zone in a rotary kiln can be divided into free tumbling zone,percolation stagnant zone and kiln wall carrying zone.The particle velocity in the free tumbling zone is the largest,while that in the percolation stagnant zone is the smallest.In the process of axial transport,the particles in the kiln undergo radial segregation to form a sandwich structure.The small particles form a core in the center of the percolation stagnant zone under the percolation effect.The large and medium-sized particles are concentrated in the free tumbling zone and the kiln wall carrying zone.The distribution of particle force chains in the kiln is uneven.The strong force chains are distributed near the kiln wall,and the weak ones are embedded throughout the free tumbling zone and percolation stagnant zone,and those in the percolation stagnant zone are thin and dense.When there is an axial velocity difference between particles with different sizes near the kiln head,the particles mix in the axial direction and undergo radial segregation. |
|
|
|