Title:
FINISHER-HEARTH-MELTER FURNACE AND METHOD OF USING FOR IRON-MAKING / STEEL-MAKING
Document Type and Number:
WIPO Patent Application WO2003064708
Kind Code:
A8
Abstract:
The invention is a furnisher-hearth-melter furnace (14), and method for iron-making/stell-making using the furnisher-hearth-melter furnace. In the method the refractory surface of the hearth (13) is coated with carbonaceous hearth conditioners and refractory compounds and charged with pre-reduced metallized iron. The pre-reduced metallized iron is reveled, then heated until molten and then reacted with carbon and reducing gas until any residual iron oxide is converted to iron having a low sulfur content. Nascent slag separates from the molten iron forming carburized iron nuggets. The nuggets are cooled and then the iron nuggets and the hearth conditioners, including the refractory compounds are discharged onto a screen (80) which separates the iron nuggets from the hearth conditioners. The hearth conditioners are recycled and the iron nuggets are either prepared for sale or for additional treatment, such as alloying in a final melter (96).
Inventors:
HOFFMAN GLENN E (US)
KLAWONN ROBERT M (US)
KLAWONN ROBERT M (US)
Application Number:
PCT/US2003/001157
Publication Date:
September 18, 2003
Filing Date:
January 15, 2003
Export Citation:
Assignee:
MIDREX INTERNAT B V ROTTERDAM (CH)
HOFFMAN GLENN E (US)
KLAWONN ROBERT M (US)
HOFFMAN GLENN E (US)
KLAWONN ROBERT M (US)
International Classes:
C21B11/00; C21B11/10; C21B13/00; C21B13/10; C21B13/12; C21B13/14; (IPC1-7): C21B11/10; C21B13/12
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