; and (c) the metal is not melted in thefurnace where the purification takes place. Acid Open-Hearth Process. Theacid open-hearth furnace is heated byburning within it gas and air, eachof which has been highly preheatedbefore it enters the combustion cham-ber. A section of the furnace is shownin… … STEEL CONSTRUCTION 15 duced as described. The impurities are oxidized by an excess ofoxygen in the furnace gases over that necessary to burn the gas.This action is so slow, however, that the 3 to 4 per cent of carbonin tlie pig iron takes a long time for combustion. The operation
Building, Iron and steel · Steel, Structural · Theses
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