ESS Smelting Technology

The envirosteel smelter is a rectangular furnace with a large free board volume and multiple channel inductors mounted below the hearth. The raw materials are charged against the back wall forming an inclined heap sloping toward the front long wall. The feed blend is spread in thin layers over the s...

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Bibliographic Details
Published in:JOM (1989) 2017-02, Vol.69 (2), p.325-334
Main Authors: Erasmus, L. J., Fourie, L. J.
Format: Article
Language:English
Subjects:
Boards
Channels
Chemistry/Food Science
Coal
Earth Sciences
Engineering
Environment
Furnaces
Hearths
Heat exchangers
Inductors
Iron compounds
Metal oxides
Metallurgy
Physics
Radiation
Raw materials
Reduction (metal working)
Thermal energy
Thin films
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Summary:The envirosteel smelter is a rectangular furnace with a large free board volume and multiple channel inductors mounted below the hearth. The raw materials are charged against the back wall forming an inclined heap sloping toward the front long wall. The feed blend is spread in thin layers over the surface of the heap and is heated by exposure to radiation from the free board. Reducing conditions in the top layer of the heap permit gas–solid reduction. Metal, in the hearth of the furnace, flows into the channel inductor where it is heated. The heated metal flows back against the front long wall to under the heap. The bottom of the heap is continuously melted by energy transferred from the metal layer. The two off-gas ducts are located in the short end walls. The combustion air is heated to around 800°C by a furnace gas in an external heat exchanger.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-016-2170-0