摘要
首次以孔径长度分布函数为基础，结合比表面积和孔隙率等参数，建立了石灰石煅烧过程中产物CaO孔隙孔径分布模型。并结合实验结果，对CaO孔的分布特性及其受烧结影响而不断演化的过程进行了模拟研究。研究时将0～50A、50～200A、200A以上这3种孔径范围的孔进行了重点分段分析，计算表明3个孔径范围（0～50A、50～200A、200A以上）的孔在不同的煅烧阶段对比表面积的贡献是不断发生变化的。在此基础上提出了最佳煅烧率的概念。最佳煅烧率随着煅烧温度的提高而向后推迟。
Based on the distribution function of pore lengths and in combination with such parameters as specific surface area and porosity etc.A pore diameter distribution model was established for the first time for CaO product generated in the process of limestone calcination.In conjunction with experimental results,a simulation study was conducted of CaO pore distribution characteristics and their continuously evolving process whenbeing subjected to the influence of sintering.In the course of the study,a section-by-section analysis has been made with emphasis on the pores with a diameter in the range of 0～50 ?,50～200 ? and over 200 ?.The calculation results indicate that the contribution from the pores in three ranges of pore diameters(0～50 ?,50～200 ? and over 200 ?) to specific surface areas in different calcination stages undergoes a continuous change.On this basis,a concept of optimum calcination rate is proposed,which will take place later with an increase in calcination temperature.
出处
《热能动力工程》
CAS
CSCD
北大核心
2006年第4期370-372,共3页
Journal of Engineering for Thermal Energy and Power
基金
电力行业青年科技促进费基金资助项目(SPQKJ02-07)
华北电力大学博士学位基金资助项目(09310015)
关键词
石灰石
CaO煅烧
孔径发布
最佳煅烧率
limestone,CaO,calcination,pore diameter distribution,optimum calcination rate
