Method and apparatus for recovery and recycling of heat from hot

Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes

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55 75, 55179, 165 47, 266155, C21B 500

Patent

active

045418640

ABSTRACT:
The present invention relates to a method and an apparatus for the recovery and recycling of heat from hot exhaust gases, specifically from exhaust gases in metallurgical processes and from warm gases having an exiting temperature of below about 800.degree. C. According to the preferred embodiment of the present invention, warm or hot exhaust fuel gases transfer their retained heat to the lower portions of vertically positioned, capillary-type action heat transfer pipes. Cold air is then directed past the upper portion of the heat pipes, thereby transferring the heat of the heat transfer pipes to the cold air. The now heated air gains further heat, prior to introduction into the blast furnace, by passing over, previously heated refractory gratings.

REFERENCES:
patent: 2434419 (1948-01-01), Laughlin et al.
patent: 4252772 (1981-02-01), Way
patent: 4326344 (1982-04-01), Smith

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