@article { author = {Ghasemi, A.R. and Hasankhoei, A.R. and Razi, E. and Parsapour, Gh.A. and Banisi, S.}, title = {Increasing drying efficiency by modifying the design of feed chute of the Gol-e-Gohar pelletizing plant ball mill}, journal = {Journal of Mining and Environment}, volume = {10}, number = {1}, pages = {213-221}, year = {2019}, publisher = {Shahrood University of Technology}, issn = {2251-8592}, eissn = {2251-8606}, doi = {10.22044/jme.2018.7447.1599}, abstract = {Pelletizing plant of the Gol-E-Gohar mining and industrial company consists of a burner, a dry ball mill (6.2 m × 13 m), and an air separator. The ball mill consists of a 2 m-long drying and an 11 m-long grinding chambers. The iron ore concentrate is fed to the drying chamber by a feed chute. It was found that when the feed moisture content increased from 1.3% to 3.5%, the throughput decreased by 12% (35 t/h) indicating a low performance of the dryer. Monitoring the wear rate of flights for a period of 12 months showed that the first 0.8 m (59%) length of the dryer length did not experience any wear. To overcome this problem, various feed chute designs with different geometries were simulated by the KMPCDEM© software. With the aim of arriving at a proper material trajectory, where the total length of the dryer is used, a new feed chute was selected. The simulation results indicated that if the height of the feed chute is increased from 1.60 to 2.26 m and the slope is increased from 45 to 48 degrees the material arrives at the first 0.48 m of the drying chamber. In this manner, the unused part of the drying chamber decreases from 59% to 36% of the length. After installation of the new feed chute during a period of three months, the throughput increased by 36 t/h.}, keywords = {Pelletizing Plant,Dryer,Feed Chute,Falling Location,KMPCDEM©}, url = {https://jme.shahroodut.ac.ir/article_1322.html}, eprint = {https://jme.shahroodut.ac.ir/article_1322_c32d7e94c557213d6d053917ba0231a2.pdf} }