PLATE-FORMED GRATE ELEMENT FOR A MOVABLE GRATE OF A FURNACE

The plate-formed grate element (1) has a top wall (12), a front end (14) and a back end (15). The front end has a lower inwardly curved wall portion (16) adapted to maintain a predetermined clearance with a back tip edge of a corresponding grate element. The grate element has an outwardly curved front wall (22) having a nominal wall thickness varying by less than ±35 per cent and extending from the top wall of the grate element to the lower inwardly curved wall portion of the front end, and a front tip edge (23) of the front end is formed by the outwardly curved front wall at its connection with the lower inwardly curved wall portion. At least one downwardly projecting cooling rib (19) extends into an area (13) formed between the outwardly curved front wall and the lower inwardly curved wall portion and is connected to these.