Production of blast-furnace gasBlast-furnace gas, produced during the manufacture of iron in blast furnaces, is aby-product fuel from the process and is consumed at the blast furnace, elsewhereon the manufacturing site, and sometimes sold to other enterprises. The blastfurnace is not designed to be a fuel conversion device but behaves like one. In orderto trace and account for the fuel and energy flows, the inputs to and outputs froma blast furnace must be divided between the transformation matrix and the energysector. Annex 1, Section 3, describes the principles of blast furnace operations andprovides guidance on the reporting of the production and use of fuels at blastfurnaces.The reporting of blast-furnace fuel use has recently changed. Formerly, all fuelsused at blast furnaces were reported as inputs to the transformation process. TheIEA then employed a model to divide the fuels between the transformation andenergy sectors. This is hidden in the published summary balance formats becausethe inputs and outputs to blast furnaces are within the Coal column.
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