| 摘要 |
<p>An apparatus for removing dross from molten metals comprises an enclosed vessel for holding a body of the metal, means defining a pool within the vessel arranged to permit overflow of metal and dross from the main body of metal when this reaches a predetermined level in the vessel, means for propelling metal and dross from the pool downwardly through a passage below said predetermined level into a well, outside the vessel, the top of the well being operable to the atmosphere so that the separated dross may be recovered by conventional techniques, e.g. shimming, there also being a passage below said level connecting the well and the body of metal for the return of the cleaned metal. A spray producer may be provided in the vessel for directing the dross towards the pool and the means for removing the dross and metal from the pool may be a helicoidal screw arrangement with a hole provided at the top of the pool defining wall to arrange for tangential delivery of metal and dross to the pool. The specific embodiment disclosed is for the removal of dross from molten aluminium which has been used in the subhalide distillation of aluminium.</p> |
