Abstract: A grate element (1) for a grate surface, e.g. in a clinker cooler, is shaped in the form of a box between the walls (3, 4) of which a number of surface-defining grate bars (5, 6) are mutually arranged so that, between them, they form fine gas channels (7). The grate bars (5, 6) alternately consist of bars (5) having a substantially rectangular cross section and bars (6) having a cross section substantially of the form of an inverted T. The rectangular bars (5) overlap the transverse sections (6a) of the T-bars, each of which is provided at the free end with a projecting, longitudinal bead (17), whereas each of the rectangular bars (5) at the sides facing the T-bars (6) are correspondingly configured with depending, longitudinal beads (15).

Abstract: A grate element (1) for a grate surface, e.g. in a clinker cooler, is shaped in the form of a box between the walls (3, 4) of which a number of grate surface-defining grate slats (5, 6) are mutually arranged so that, between them, they form fine gas slots (7). Under each of these slots (7) the grate element 1 comprises an L-shaped slat (9) the ends of which are fixed to the side walls (3, 4) and the body (6) of which is fixed along its entire length to the overlying grate slat (5) so that the foot (12) of the L-shaped slat is positioned parallel to the grate slats (5).Hereby it is obtained that the grate element is effectively cooled, that the pressure loss through the grate element is appropriately large, that the grate element is protected against falling-through of material and that maintenance work in connection with the replacement of grate elements is facilitated.

Abstract: A grate element for a grate surface, e.g. in clinker cooler, comprises a top plate which is shaped in the form of a box having a surface which is plane at one end, whereas at the other end it consists of in cross section downwardly curved slats which, between them, form slots. The grate element further comprises a corrugated bottom plate which is provided with longitudinal rows of slots and projections rising into the slots of the top plate, and gas channels which are defined by the underside of the slats of the top plate and the upper side of the bottom plate, and open at the slots in the two plates. Accordingly, the top plate of the grate element is effectively cooled, the pressure loss through the grate element is appropriately large, the grate element is protected against falling-through of material and maintenance work in connection with the replacement of grate elements is facilitated.