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US 7,452,497 B2Granted
Furnace sidewall structure of rotary hearth furnace
AssigneeNippon Steel Corporation
InventorsTomoaki Shibata, Shinji Shima
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AssigneeNippon Steel Corporation
InventorsTomoaki Shibata, Shinji Shima
Estimating the term…
A furnace sidewall structure of a rotary hearth furnace for making direct reduced iron which is agglomerated iron ore or waste iron oxide containing a reducing agent on a rotary hearth by heating or for heating at least one steel piece, wherein the rotary hearth furnace includes an outer furnace sidewall and an inner furnace sidewall, wherein at least one of the outer furnace sidewall and the inner furnace sidewall is polygonal. The furnace sidewall structure can be prepared with lower manufacturing costs relative to conventional circular profile rotary hearth furnace with respect to the furnace sidewall. The production thereof is easy with respect to manufacturing and with respect to the fact that the dimensional accuracy of the manufactured furnace sidewall can be easily adjusted. Also, there is associated a shorter installation/construction work period and a reduction in the installation/construction cost.
A furnace sidewall structure of a rotary hearth furnace for manufacturing direct reduced iron from compacts, wherein the compacts are a mixture of iron ore or waste iron oxide and carbonaceous material as a reducing agent, wherein the compacts are placed on a rotating hearth and are reduced in a high-temperature atmosphere to thereby produce said reduced iron, or for heating at least one steel piece on the rotating hearth in a high-temperature atmosphere, said furnace sidewall structure comprising:
A furnace sidewall structure of a rotary hearth furnace for manufacturing direct reduced iron from compacts, wherein the compacts are a mixture of iron ore or waste iron oxide and carbonaceous material as a reducing agent, wherein the compacts are placed on a rotating hearth and are reduced in a high-temperature atmosphere to thereby produce said reduced iron, or for heating at least one steel piece on the rotating hearth in a high-temperature atmosphere, said furnace sidewall structure comprising:
A furnace sidewall structure of a rotary hearth furnace for manufacturing direct reduced iron from compacts, wherein the compacts are a mixture of iron ore or waste iron oxide and carbonaceous material as a reducing agent, wherein the compacts are placed on a rotating hearth and are reduced in a high-temperature atmosphere to thereby produce said reduced iron, or for heating at least one steel piece on the rotating hearth in a high-temperature atmosphere, said furnace sidewall structure comprising:
Dependencies are inferred from the claim text.