This Sankey diagram of energy flows in a “pusher type reheating furnace” illustrates an article on ‘Reheating Furnaces in Steel Plants’ by Satyendra on the ISPAT Guru blog.

Unit of flow is not clear, but the main stream arriving from the top represents the baseline 100% (508 units) of which a portion can be recuperated and fed back into the furnace as preheated air.

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