Energy Conservation in Sintering Ignition Process Based on Comprehensive Ignition Intensity

摘要

Ignition is the start point of the sintering circuit, which plays an important role during the whole sintering process. The gas consumption accounts for 80% energy cost in the sintering ignition process. Therefore, gas flow reduction is of great significance to energy conservation in the sintering ignition process. In current study, the concept of comprehensive ignition intensity (CII) was introduced to determine the ignition effect. The experimental results indicate that the value of CII increases with higher air-fuel ratio at gas flow of 550 and 600 Nm~3/h. From another point of view, given constant Clf value, lower gas flow can be achieved with higher air-fuel ratio. Based on the comprehensive ignition intensity, the ignition parameters were optimized and the gas flow was subsequently reduced. By increasing the air-fuel from 5.5 to 6.6, the gas flow is reduced from 450 Nm~3/h (8.1 GJ/h) to around 350 Nm~3/h (6.3 GJ/h).