期刊
IRONMAKING & STEELMAKING
卷 37, 期 2, 页码 81-88出版社
TAYLOR & FRANCIS LTD
DOI: 10.1179/030192309X12506804200663
关键词
Hydrogen reduction; Iron oxide concentrate; Ironmaking; Rate analysis; Suspension reduction
资金
- American Iron and Steel Institute [TRP 0403C]
- US Department of Energy [DE-FC36-97ID13554]
A novel ironmaking technology is under development at the University of Utah. This technology produces iron directly from fine iron oxide concentrate by a gas-solid suspension reduction, utilising hydrogen as the main reducing agent for high reactivity, for the elimination of carbon dioxide release during ironmaking operations and also pursuing the direct use of concentrates to bypass the problematic pelletisation/sintering and cokemaking steps in the steel industry. This paper is mainly focused on the kinetic feasibility tests of the proposed process showing that the reduction rate was fast enough to obtain 90-99% reduction within 1-7 s at 1200-1500 degrees C, depending on the amount of excess hydrogen supplied with the iron oxide. This indicates that the reduction rate of concentrate particles by hydrogen containing gases is sufficiently fast for a suspension reduction process and forms the most important basis for the new technology.
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