Grate block for a combustion grate

A grate block for a combustion grate in which a plurality of sequential grate blocks are arranged one above the other in a step-like manner, the plurality of sequential grate blocks being configured so as to rearrange and convey combustion material during combustion by pushing movements that are carried out relative to each other, the grate block comprising:

• a block member integrally formed as a cast component, the block member including:
• an upper wall forming a support face that extends at least partially parallel with a longitudinal axis of the block member, the combustion material being conveyed along the support face of the upper wall, and a foremost end of the upper wall, when viewed in a pushing direction, forms an edge via which the support face descends into a pushing face;
• a front wall forming the pushing face, the front wall including at least one air supply opening which, when viewed as a longitudinal section, extends perpendicularly or obliquely with respect to the pushing face to supply air to the combustion grate, the front wall forming a base in a lowest region of the front wall, which is configured to be positioned on a corresponding support face of an adjacent grate block, which is adjacent in the pushing direction;
• and
• at least one side wall including at least one wear marking formed on the side wall of the grate block,
• wherein:
• at least a front support edge of the pushing face is arranged in a plane extending substantially perpendicularly to the longitudinal axis,
• the edge of the foremost end of the upper wall is offset forward with respect to the plane when viewed along the longitudinal axis and in the pushing direction,
• the at least one air supply opening is arranged below the edge of the foremost end of the upper wall and is offset backward with respect to the edge of the foremost end of the upper wall when viewed along the longitudinal axis and in the pushing direction, and
• the upper wall and the front wall each include a wall thickening region, which is thicker than a remaining portion of each of the upper wall and the front wall, each wall thickening region being formed where the upper wall and the front wall intersect each other, and each wall thickening region is curved when viewed in a longitudinal cross-section.