Patent ID: 6253927
Filing Date: 2001-07-03
Classification: B07B

Abstract:
A roller screen for screening pellets for sintering, comprising several rotating rollers of essentially equal diameters installed in succession at given clearances and arranged transversally in relation to the proceeding direction of material that is placed on the rollers to be screened, a separate rotation motor for rotating each roller, and an adjusting member for adjusting the mutual position of the rollers in order to screen a desired particle size, the screen path of the roller screen including three successive screening parts installed on the same level, which are mutually connected so that each roller of the screening parts is provided with a separate rotation motor, and the speed of rotation of a roller increases in the proceeding direction of the material towards the final end of the roller screen, the spaces between rollers being separately adjustable in the different screening parts, the second screening part being used to adjust the average size of pellets that are fed for sintering through the third screening part.