Ключевые слова: classification of rocks classifier, classifying screen, concentrate, department manufactory, dressing, enriching, enterprise iron ore concentration grinder, fabricator, factory, grader, gravitate wash mineral dressing, grinding mill benefication, manufactory, mill, mineral processing metalurgy heavy economics, operation shopfloor, ore dressing, ore dressing treatment classifier, picking plant shop, plant, production unit, separation mining smelting ore benefication, sizer, sizing screen, work, workshop,