Installation for treatment of minerals on a continuous circular grill

摘要

Pelletised ores are treated with hot gases on a continuous circular rotary grid mounted for rotation on a fixed base. Radial beams form cradles supporting the grid. The grid is made up of bars sitting on the radial beams. The grid rotates through various treatment zones with each zone having an upper box and a lower box with respect to the grid with the boxes fixed in position and fluid-tight. The radial beams are cooled and are mounted on concentric rings rotating at the same angular velocity. The mounting of the beams on the concentric rings permits free radial expansion of the beams. The vertical, lateral sides of the radial beams are connected by flexible members allowing tangential expansion of the radial beams.