Polygonal rotary oxidation furnace

The utility model discloses a polygonal rotary oxidation furnace which comprises a support and a rotary furnace body mounted on the support, the rotary furnace body comprises a polygonal hearth, a material inlet/outlet formed in one end of the polygonal hearth, and an air inlet formed in the other end of the polygonal hearth; the polygonal hearth is divided into a horizontal-section hearth and an inclined-section hearth, and the inclined-section hearth is close to the feeding and discharging port and is gradually narrowed from the inner wall of one side of the horizontal-section hearth to the caliber of the feeding and discharging port; the longitudinal section of the inner wall of the polygonal hearth is in an equilateral hexagon shape or an equilateral octagon shape. The hearth structure of the rotary oxidation furnace is improved, the cross section of the inner wall of the hearth is in an equilateral hexagon shape or an equilateral octagon shape, the motion state of alloy powder is in a playing and overtur