The utility model discloses a steam drying machine that dry copper concentrate was used, it includes the tubulose box that the level was arranged, on the box, the lower part is provided with feed inlet and discharge gate respectively, the inner wall department of said box has arranged the heating unit, and is provided with material conveying unit in the box, and row outside the discharge gate is located is again carried to the material that dynamic mechanism driving material conveying unit will fall into in the box compared with the prior art, the utility model discloses set up material conveying unit in the box, carry the copper concentrate through material conveying unit, can effectively reduce the wearing and tearing of copper concentrate to equipment such as heating units like this to the stability and the reliability of improve equipment operation.