Recovery of heat from molten slag from metallurgical processes

Apparatus for recovering heat from slag from a metallurgical process, comprising:

• a vessel with an open top for containing the slag;
• a cover structure for covering the top of the vessel with a space formed between the cover structure and the surface of the slag;
• radiant heat absorbing means disposed in said space and communicating with piping outside the cover structure, a fluid medium being passed through the radiant heat absorbing means thereby to absorb heat radiated by the slag and transfer the heat to the heat absorbing means for utilization;
• and means for exposing part of the slag of relatively higher temperature on the surface of the slag.

Apparatus for recovering heat from slag from a metallurgical process, comprising:

• a plurality of vessels with open tops adapted to contain portions of the slag and disposed end-to-end in a circle;
• a plurality of trucks coupled end-to-end in said circle and each supporting a respective one of the vessels;
• rail means laid out in said circle and supporting said trucks thereon;
• an annular cover structure for covering the tops of the vessels from above with a space formed therebetween;
• radiant heat absorbing means disposed in said space and communicating with piping outside the cover structure, a fluid medium being passed through the radiant heat absorbing means thereby to absorb heat radiated by the slag and transfer the heat to the heat absorbing means for utilization;
• and means for agitating the slag in each vessel thereby to remove any cooled slag layer from the upper surface of the slag and to stir the slag in molten state as well as in subsequently solidified condition at high temperature.