The Relationship between Sinter Mix Composition and Flame Front Properties by a Novel Experimental Approach

ABSTRACT

This study explores a new technique for iron ore sintering to assess some flame front properties in a laboratory test, such as the flame front speed, combustion zone duration time, combustion zone thickness, combustion rate, and study the relationship between sinter mix composition and flame front properties. Results agree with those obtained by other researchers using embedded thermocouples and also predictions from a numerical sintering model well. When flame front moves forward, combustion zone duration time (DTCZ) and thickness increases. DTCZ increases from 1.65 min at the top interface to 1.80 min at the bottom interface. Combustion zone thickness is closely related with flame front speed. Melt in the iron ore sintering process has a large influence on flame front parameters, which affects oxygen diffusion on the coke surface, sinter bed permeability, and the heat transfer. Coke combustion rate is closely related with flame front speed and single coke particle burn-out time.

KEYWORDS:

• Flame front properties
• Iron ore
• Sintering

Additional information

Funding

This work was supported by Zhejiang Provincial Public Welfare Project of China (2017C31062).