烧结过程碳燃烧模拟研究

Simulation study on carbon combustion during sintering process

在考虑孔隙率的基础上采用缩核模型,研究了单颗粒煤焦在烧结床上的燃烧过程,通过数值模拟着重研究了不同氧含量和环境温度下烧结过程中煤焦颗粒的燃烧状况。研究发现:烧结过程中煤焦着火点为973K时,燃烧所能达到的最高温度为1650K;随着灰层增加,颗粒反应速率下降;提高助燃剂中氧含量及环境温度有助于颗粒的燃烧;颗粒尺寸对于烧结过程有着重要的影响。

On the basic of shrinking core model considering porosity,focus on the progress of coal-ore combustion in the sintering- bed,using simulation method to study the influence of different oxygen contents and environment temperatures on the sintering progress. The study results show that while the burning temperature is 937K,the highest temperature during the combustion can be 1650K. The reaction rate of the particle decreases while the thickness of the ash increases. Higher oxygen content and environment temperature will improve the coal- ore combustion,and particle size has a great impact on the sintering progress.