نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشکده مهندسی معدن، دانشکدگان فنی، دانشگاه تهران، تهران، ایران.
2 دانشکده مهندسی معدن، نفت و ژئوفیزیک دانشگاه صنعتی شاهرود
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Roller screens are key equipment in mineral processing lines, and their proper performance has a direct impact on separation efficiency, production capacity, and maintenance costs. In addition to affecting the separation performance, changing operating parameters can also affect the mechanical behavior of rollers, increasing deformation, stress, and ultimately reducing the equipment life. Despite the importance of this issue, the simultaneous study of the effect of operating parameters on the mechanical behavior of rollers using coupled modeling and experimental validation has received little attention so far. In this study, assuming elastic behavior of the rollers and using specific operating conditions, the effect of the under-screen gap and feed capacity on the mechanical behavior of roller screen rollers was investigated using the coupled discrete-element-finite-element method (DEM-FEM) at laboratory and industrial scales. The innovation of this research is the development and validation of a coupled DEM–FEM model for analyzing the mechanical behavior of rollers through experimental measurements with strain gauges. The results showed that reducing the underscreen gap from 9.75 to 9 mm increased the average total roller deformation by 29.71%. Also, on an industrial scale, with the increase in operating capacity from 120 to 200 t/h, the roller deformation increased from 1.89 × 10-2 to 2.95 × 10-2 mm. The validation results also indicated that the average difference between the values obtained from simulation and experimental measurements is less than 5%, which confirms the accuracy and reliability of the developed model. This model can be used as an efficient tool for designing, evaluating, and optimizing the operating conditions of roller screens.
کلیدواژهها [English]
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