عنوان مقاله [English]
Ore sorting proposed as an important step in the ore dressing of chromite processing and limited results have been reported in this field. By using this method, which is included in the classification of physical separations, significant energy savings and increased production are made. In this project, the separation of chromite has been accomplished by designing and building an ore sorting device. For this purpose, minerals are first imaged by a 3D scanner, and after creating a cloud of points, the volume of the corresponding stone piece is obtained, and based on that, the equivalent diameter of the stone piece is determined. Then ores placed on the device’s conveyor and the mass of each pieces are measured by load cell sensor and the density of minerals determined. Finally, according to the size and specified conditions of each fraction, the grade of stone pieces determined and based on the specified limit for grade, it is directed to the concentrate section (valuable part) or tailings (non-valuable part). The obtained results illustrated that the Sabzevar chromite with a grade of 26.16 percent with gaunge minerals after ore sorting, produces an initial concentrate with 33.11 and 83.92 percent of the grade and recovery respectively.