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Title: Multiple hearth furnace for reducing iron oxide

Abstract

A multiple moving hearth furnace (10) having a furnace housing (11) with at least two moving hearths (20) positioned laterally within the furnace housing, the hearths moving in opposite directions and each moving hearth (20) capable of being charged with at least one layer of iron oxide and carbon bearing material at one end, and being capable of discharging reduced material at the other end. A heat insulating partition (92) is positioned between adjacent moving hearths of at least portions of the conversion zones (13), and is capable of communicating gases between the atmospheres of the conversion zones of adjacent moving hearths. A drying/preheat zone (12), a conversion zone (13), and optionally a cooling zone (15) are sequentially positioned along each moving hearth (30) in the furnace housing (11).

Inventors:
 [1];  [1]
  1. Charlotte, NC
Issue Date:
Research Org.:
Nu-Iron Technology, LLC (Charlotte, NC)
Sponsoring Org.:
USDOE
OSTI Identifier:
1039758
Patent Number(s):
8133299
Application Number:
12/513,872
Assignee:
Nu-Iron Technology, LLC (Charlotte, NC)
Patent Classifications (CPCs):
C - CHEMISTRY C21 - METALLURGY OF IRON C21B - MANUFACTURE OF IRON OR STEEL
F - MECHANICAL ENGINEERING F27 - FURNACES F27D - DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
DOE Contract Number:  
FG36-05GO15185
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Brandon, Mark M, and True, Bradford G. Multiple hearth furnace for reducing iron oxide. United States: N. p., 2012. Web.
Brandon, Mark M, & True, Bradford G. Multiple hearth furnace for reducing iron oxide. United States.
Brandon, Mark M, and True, Bradford G. Tue . "Multiple hearth furnace for reducing iron oxide". United States. https://www.osti.gov/servlets/purl/1039758.
@article{osti_1039758,
title = {Multiple hearth furnace for reducing iron oxide},
author = {Brandon, Mark M and True, Bradford G},
abstractNote = {A multiple moving hearth furnace (10) having a furnace housing (11) with at least two moving hearths (20) positioned laterally within the furnace housing, the hearths moving in opposite directions and each moving hearth (20) capable of being charged with at least one layer of iron oxide and carbon bearing material at one end, and being capable of discharging reduced material at the other end. A heat insulating partition (92) is positioned between adjacent moving hearths of at least portions of the conversion zones (13), and is capable of communicating gases between the atmospheres of the conversion zones of adjacent moving hearths. A drying/preheat zone (12), a conversion zone (13), and optionally a cooling zone (15) are sequentially positioned along each moving hearth (30) in the furnace housing (11).},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {3}
}