Experimental Research of the Ignition of Converter Gases by Hot Particles

doi:10.3969/j.issn.1005-3026.2015.09.027

Journal of Northeastern University:Natural Science ›› 2015, Vol. 36 ›› Issue (9): 1342-1346.DOI: 10.3969/j.issn.1005-3026.2015.09.027

• Resources & Civil Engineering • Previous Articles Next Articles

Experimental Research of the Ignition of Converter Gases by Hot Particles

SHANG Rong-xue¹， LI Gang¹， YU Li-fu¹， DONG Mao-lin²

1. School of Resources & Civil Engineering， Northeastern University， Shenyang 110819， China; 2. SISDI Engineering Co.， Ltd.， Chongqing 401122， China.

Received:2014-07-28 Revised:2014-07-28 Online:2015-09-15 Published:2015-09-14
Contact: LI Gang
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Abstract

Abstract: In order to analyze the explosion risk of converter gases in the process of reclaiming， a set of test devices for converter gas ignition by iron oxide particles heated radiatively was set up. The rules of mixture ignition at varied initial temperatures and with particle diameters were investigated， based on the explosion pressure and temperature changes of converter gases/air mixtures. The results showed that when the particle diameters are constant， the sensitive concentrations of converter gases/air mixtures increase by 5% if the initial temperature changes from 100℃ to 35℃. The ignition temperatures of 1.5mm-diameter particles drop by 137.6， 145 and 134.5℃ compared to the 0.5mm-diamete particles when the initial temperature is 35， 100 and 200℃ respectively. When the particle diameters are 0.5mm， 1.0mm and 1.5mm separately， the ignition temperatures decrease by 19.8， 11.6 and 16.7℃ with the initial temperature changing from 200℃ to 35℃. The research findings can provide a reference for limiting hot particle diameters before high temperature converter gases enter heat exchangers.

Key words: hot particle, converter gas, laser heating, particle diameter, ignition temperature

CLC Number:

TD712.7

SHANG Rong-xue， LI Gang， YU Li-fu， DONG Mao-lin. Experimental Research of the Ignition of Converter Gases by Hot Particles[J]. Journal of Northeastern University:Natural Science, 2015, 36(9): 1342-1346.

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Experimental Research of the Ignition of Converter Gases by Hot Particles

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