Grate bar for rotary furnace

The utility model provides a grate bar for a rotary furnace, which comprises a grate bar support frame, a grate bar body is arranged on the grate bar support frame, and a heat-resistant layer is arranged at the upper part of the grate bar body; wherein the grate bar body comprises a grate body cross beam, a grate body waist part is arranged at the lower part of the grate body cross beam, and supporting legs are arranged at the two ends of the grate body waist part; a groove is formed in one end of the grate body cross beam, a supporting block assembly is arranged in the groove, a first T-shaped protrusion is arranged on the lower surface of the grate body cross beam, and a first T-shaped groove matched with the first T-shaped protrusion is formed in the upper surface of the grate body waist portion. According to the grate bar, the grate bar body can be rapidly detached from the grate body supporting frame to be replaced by arranging the supporting assembly; the supporting columns are arranged on the grid sect