Through the support for reconstruction from the disaster of the great earthquake in the eastern Japan in 2011, The Iron Technology and History Forum” of the Iron and Steel Institute of Japan received a request to study the molten iron and steel production in low height furnace with iron-sand smelting, and started up “IMPRESSIVE”, the research workshop of the Iron Manufacturing Process Engineering and Scientific Study in Vetus Iron in 2013. The research workshop IMPRESSIVE has studied the process engineering of ironmaking with iron sand under dynamic states in a low height furnace. As results, in the iron-sand refining using a low-height furnace, the subjects of unit operations in the dynamic state are considered to be three couplings of reactivity of wood charcoal, basicity of iron sand and furnace structure with tuyere. Combining these unit operations, the metal discharge shows a variety including flow out like a serpent and its composition being converted into higher purity molten pig iron.
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