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This study focused on iron making related informatio n through analyzing slags and furnace wall collected from iron production site of Suryong-ri Wonmorongi, Chungj u. Total Fe content of slags were from 36.98% to 44.47% and this range was general recovery rate of iron in ancient. Compounds of calcium included slags was supposed to add intentionally during smelting pr ocess as deoxidation agent in order that these helped to se parate iron from impurities. Furnace wall didn't make of high alumina clay because of low Al

Scientific Analysis of Slags and Furnace Wall collected from Iron Production Site at Suryong-ri Wonmorongi in Chungju