The present invention relates to a cooler for cooling particulate material which has been subjected to heat treatment in an industrial kiln, such as a rotary kiln for manufacturing cement clinker. This cooler comprises an inlet, an outlet, end wall, side walls, a bottom and a ceiling, at least three reciprocating supporting lanes for receiving, supporting and transporting the material to be cooled, the lanes are moving following the walking floor principles as well as means for injecting cooling gas into the material through grate plates in the lanes. The present invention relates to an increasing in the vertical shearing height, and still having stationary clinker on top of the grate plates, see FIG. 5. The length of the tilted element (16) is L and the distance (13) between two devices is G. The angle between the element (16) and horizontal is alfa (18). Since the air is distributed evenly from the full grate plate area it is obvious and understandable that the L*cosines(alfa) becomes a shadow area where all air from the region in the grate plate will go through the stationary clinker and leave the tip of L at this one point only. Again, it is not good for the heat recuperation to have a shadow area too bigas it, again, gives an uneven air flow through the clinker bed, damaging the heat recuperation. The vertical shearing height is on the other hand L*sinus(alfa). But if alfa becomes too large (approximately above 60 deg.), it will block the sliding effect, as now the clinker will not get forced over the plate's L-part, and then the wished larger vertical shearing is not achieved. It is hereby a compromise to get a certain vertical shearing: L*sinus(alfa) by not having a too large shadow area L*cosines(alfa), but still having the angle alfa so low that the clinker will slide at Lsee FIG. 5.

A grate bar (for forming a plank of a conveyor grate for transporting bulk material) includes at least an up-facing surface for supporting bulk material, a down-facing surface for supporting the grate bar on at least one grate bar rest, front end and rear-end sides, first and second profiled narrow sides. The first and second profiled narrow sides are complementary to one another and form a moving gap therebetween if and/or when the first profiled narrow side of the chosen grate bar is positioned adjacent to the second profiled narrow side of a neighboring grate bar (that is identical to the chosen grate bar at least with respect to the profile of the second profiled narrow side). The grate bar can be easily replaced if a front edge between the up-facing surface and the front-end side has a front edge curvature, a rear edge between the up-facing surface and the rear-end side has a rear edge curvature and the rear edge curvature is complementary to the front edge curvature.

A cooler (1) for cooling hot bulk goods (17) preferably iron ore sinter: The cooler has a grate surface (16) for holding the hot bulk goods (17) to be treated to reduce the dust emissions and at the same time to also enable maintenance measures on the cooler (1). Covers are located in the region of the feed point (2) and the removal point (3). The device herein provides an additional boundary, which prevents the removal of dust particles of size over 150 m. The boundary is a stationary first wall (12) and a stationary second wall (11) and the boundary extends over a partial segment, and preferably over the entire region, of the uncovered grate surface (16). A supporting structure (18) is provided, to which the first wall (11) and the second wall (12) are fastened.

A grate bar (for forming a plank of a conveyor grate for transporting bulk material) includes at least an up-facing surface for supporting bulk material, a down-facing surface for supporting the grate bar on at least one grate bar rest, front end and rear-end sides, first and second profiled narrow sides. The first and second profiled narrow sides are complementary to one another and form a moving gap therebetween if and/or when the first profiled narrow side of the chosen grate bar is positioned adjacent to the second profiled narrow side of a neighboring grate bar (that is identical to the chosen grate bar at least with respect to the profile of the second profiled narrow side). The grate bar can be easily replaced if a front edge between the up-facing surface and the front-end side has a front edge curvature, a rear edge between the up-facing surface and the rear-end side has a rear edge curvature and the rear edge curvature is complementary to the front edge curvature.

A method can be used to cool bulk material in a fine material cooler. The method may involve admitting bulk material to be cooled into the fine material cooler through a material inlet, conveying the coarse material with a first mechanical or pneumatic conveying unit, and conveying the fine material with a second conveying unit in a conveying direction through the fine material cooler to a material outlet. The bulk material may have a fine material proportion of 70% to 95% and a coarse material proportion of 5% to 30%. The fine material may have a grain size of 10-5 mm to 4 mm, and the coarse material may have a grain size of 4 mm to 100 mm.

A clinker inlet distribution grate for feeding a conveyor grate with clinker, previously discharged from a kiln onto the clinker inlet distribution grate wherein the clinker inlet distribution grate comprises at least a chute with at least two grate elements being arranged one besides the other providing a chute enables to easily remove clinker agglomerations, so called snowmen if at least a first of said at least two grate elements is static and that at least a second of said at least two grate elements is movable orthogonally to the cross direction of the chute.

A method for cooling solid residues of a combustion process, which are deposited onto the conveying surface of a conveyor belt of a conveying device and are conveyed in the direction of a solid residue outlet, wherein during conveying heat is transferred from the solid residues to a gaseous coolant. The method is characterized in that the conveyor belt is acted upon by coolant only on its side oriented away from the conveying surface, the conveyor belt is essentially impermeable to the coolant and at least part of the coolant heated by contact with the conveyor belt is extracted on that side oriented away from the conveying surface.

A grate plate used in a grate cooler for bulk material, comprising a first region alternately covered by a further grate plate during use and having at least one pocket for holding bulk material as an autogenous wear protection layer, and a second region not covered during use, and also having at least one bulk material pocket and at least one cooling air opening leading to a grate plate underside. The height of the first region pockets is smaller than the second region pockets height. The base of the first region pockets is formed by multiple segments having upper surfaces as bulk material contact surfaces and between which gap-like cooling air channels are formed. Openings of the cooling air channels are oriented at an angle to vertical, such that an acute angle occurs between the conveying direction and the direction of the cooling air flow via these openings.

A method can be used to cool bulk material in a fine material cooler. The method may involve admitting bulk material to be cooled into the fine material cooler through a material inlet, conveying the coarse material with a first mechanical or pneumatic conveying unit, and conveying the fine material with a second conveying unit in a conveying direction through the fine material cooler to a material outlet. The bulk material may have a fine material proportion of 70% to 95% and a coarse material proportion of 5% to 30%. The fine material may have a grain size of 10-5 mm to 4 mm, and the coarse material may have a grain size of 4 mm to 100 mm.

A clinker inlet distribution grate for feeding a conveyor grate with clinker, previously discharged from a kiln onto the clinker inlet distribution grate wherein the clinker inlet distribution grate comprises at least a chute with at least two grate elements being arranged one besides the other providing a chute enables to easily remove clinker agglomerations, so called snowmen if at least a first of said at least two grate elements is static and that at least a second of said at least two grate elements is movable orthogonally to the cross direction of the chute.