高硅铝煤灰熔融流动特性的调控研究进展

Review on the regulation of ash fusion and flow characteristics of high silicon-aluminum coals

在对添加剂(钙基、镁基、铁基)、生物质(K、Na)、配煤三种调控方法讨论的基础上,对煤灰流动温度的变化规律进行了分析,并从低温共熔、成键机理和吉布斯自由能角度论述了流动温度降低的机制。最后对预测煤灰流动温度的方法(最小二乘法、多元线性回归分析)进行了归纳。为添加剂、生物质和配煤调控高硅铝煤的灰熔融流动特性提供指导,从而促进高硅铝煤的高效洁净转化。

Based on discussion of the three regulation methods of additives(calcium based,magnesium based,iron based),biomass(K,Na)and coal blending,the change rules of flow temperature(FT)were analyzed,and the mechanisms for the decrease of FT were discussed from the perspectives of low temperature eutectics,bonding mechanism,and Gibbs free energy.Finally,different methods(least square method,multiple linear regression analysis)for predicting coal ash FT were induced.This might guide the selection of coal type,additive,biomass species and ratio,and brought out theoretical support for clean and efficient utilization of high silicon aluminum coal.