Direct smelting reduction furnace

The utility model discloses a direct smelting reduction furnace and belongs to the technical field of non-blast furnace ironmaking. The reduction furnace comprises a flue gas chamber, a methane-rich gas spray gun, an oxygen-rich gas spray gun, a fuel gas spray gun, a solid powder spray gun, a hearth lining, a front furnace, a slag hole, a direct smelting reduction furnace, a conical section and the like; the lower part of the direct smelting reduction furnace is cylindrical, a hearth lining is built in the direct smelting reduction furnace and is communicated with the front furnace, the upper part of the direct smelting reduction furnace is sequentially connected with a conical section and a flue gas chamber, and a gas outlet is formed in the flue gas chamber; a water cooling wall is arranged on the inner surface of the furnace shell of the direct smelting reduction furnace; a slag hole is formed above the hearth; the direct smelting reduction furnace is provided with a solid powder spray gun in the circumfer