The invention relates to a method for fitting or retrofitting a sinter cooler (1), which sinter cooler (1) comprises a cooler grate chain with an endless chain of cooler cars (2). In order to provide means for increasing the effectiveness of the sinter cooler, the invention provides that the method for fitting comprises, for at least one cooler car (2), installing a lamella grate (10) for holding sinter material and allowing air flow through the grate so that a support structure (13) is connected to the cooler car (2) and a plurality of lamellae (12) are supported by and individually movable with respect to the support structure (13), and are disposed to allow air flow between neighbouring lamellae (12). The support structure (13) comprises at least one support element (14) disposed underneath the plurality of lamellae (12) to support the plurality of lamellae (12), and at least one downholder (15) that is adapted to limit an upward motion of at least one lamella (12) is installed such that at least a portion of the downholder (15) is disposed above the at least one lamella (12). In case of retrofitting a sinter cooler (1) comprising a rigid grate (5) for holding sinter material, the method for retrofitting further comprises removing the rigid grate (5) before installing the lamella grate (10).

A method for fitting or retrofitting a sinter cooler, which sinter cooler has a cooler grate chain with an endless chain of cooler cars, the method including, installing a lamella grate for holding sinter material and allowing air flow through the grate so that a support structure is connected to the cooler car and a plurality of lamellae are supported by and individually movable with respect to the support structure, and are disposed to allow air flow between neighbouring lamellae, where the support structure has at least one support element disposed underneath the plurality of lamellae to support the plurality of lamellae, and at least one downholder that is adapted to limit an upward motion of at least one lamella installed such that at least a portion of the downholder is disposed above the at least one lamella.

A device for treating bulk material with a gas, the device including a grate through which gas can flow from an under-grate space to the upper side and which conveys a layer of bulk material in a conveying direction from a loading end to a discharge end. The grate has a plurality of mutually adjacent rows, each of which includes at least one bar that is elongate in the conveying direction and may be moved alternately back and forth in the conveying direction. Driving is controlled such that the forward stroke of the at least one bar of two adjacent rows takes place at the same time, while the rearward stroke of the at least one bar of two adjacent rows takes place at different times.

A device for treating bulk material with a gas, the device including a grate through which gas can flow from an under-grate space to the upper side and which conveys a layer of bulk material in a conveying direction from a loading end to a discharge end. The grate has a plurality of mutually adjacent rows, each of which includes at least one bar that is elongate in the conveying direction and may be moved alternately back and forth in the conveying direction. Driving is controlled such that the forward stroke of the at least one bar of two adjacent rows takes place at the same time, while the rearward stroke of the at least one bar of two adjacent rows takes place at different times.