• McNally Sayaji Engineering Limited

Roller Screen

McNally Sayaji Engineering Limited (MSEL) is one of India’s leading manufacturers of crushing, screening, milling, material handling and other heavy equipment, serving the core sectors of the economy. These sectors include coal, mining and mineral processing, power, steel, ports, cement, aluminium and non-ferrous metals. The company offers Roller Screens, suitable for classifying coarse, moist, sticky or clayey raw materials. They are used for primary screening and crusher relief as well as for classifying/control screening after the crushing process. Roller screens are arranged either horizontal or inclined. With the horizontal design, the drive of each roll is effected via bevel gear pair with common longitudinal shafts. Depending on the feeding material, one or two drives are provided. The drive for the longitudinal shafts is effected via front electro motors including fluid starter coupling, transmission gear and flexible coupling. Alternatively, the roller screen rolls can either be driven via tooth chains running in an oil bath or individually. In case of roller screens in inclined arrangement, the drive is effected via tooth chains running in an oil bath. Loamy particles, which stick to the coarse material, are separated and screened together with the final product. In case of very moist, sticky or clayey raw materials the roller screen rolls are fitted with scrapers, which clean the bottom of the rolls. They are individually adjustable. Another possibility is using surrounding scrapers being driven via gear motors including chains. The kind of scraper depends on the plant requirement. Advantages: high specific capacity at low power requirements, low spare parts requirement, smooth and quiet run, adequate primary screening machines for crushers, (i.e., hammer mill, roll crusher, etc).