ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Regular Article
Hot Airflow Ignition with Microwave Heating for Iron Ore Sintering
Zhucheng HuangLingyun YiTao JiangYuanbo Zhang
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JOURNALS OPEN ACCESS

2012 Volume 52 Issue 10 Pages 1750-1756

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Abstract

At present coal gas with high calorific value is used in ignition (CGI) of iron ore sintering, which brings about problems of high energy consumption and environmental pollution. In this paper, the ignition model using microwave heating (MHI) was developed. Took raw materials of a domestic sintering plant as sample, model calculations showed that the minimum ignition temperature was 638.54°C and the energy consumption was 42.03 MJ/m2 for MHI process in ignition time of 1.5 min. According to the sintering experiments, with ignition at 660°C for 1.5 min the main indexes of sinter qualities and production in MHI were better than those of CGI (1050°C) process. And the ignition energy consumption (IEC) in MHI was 43.77 MJ/m2, which was far less than 185.13 MJ/m2 of CGI. Results also show other advantages of sufficient combustion of coke, better mineralized sinter and less polluted flue gas in MHI process.

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© 2012 by The Iron and Steel Institute of Japan
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