摘要
鉴于粉煤灰和煤矸石的产量很大,其资源化利用率问题备受关注。将超细粉煤灰、煤矸石和黏土按一定比例在不同温度下焙烧成薄板状砖,同时以粉煤灰代替超细粉煤灰作为对照组。研究了用超细粉煤灰和煤矸石代替部分黏土焙烧成砖块的优越性,并研究了超细粉煤灰烧结料性能的机理。研究表明:1100℃焙烧100 min,掺超细粉煤灰比掺等量的粉煤灰试样物理性能好,吸水率能达到10%以下;强度为MU30优等级;导热系数为0.41 W/(m·K)。试样块XRD图谱上出现明显的石英、莫来石特征峰;SEM电镜观察可见,石英将少量莫来石覆盖,烧结试样致密性优良;TG-DTA热机理显示试样的的最佳烧结温度为1150℃。这项研究表明了粉煤灰超细化处理的必要性。
In view of production of fly ash and coal gangue being very large, much attention has been paid to the problem of its resource utilization. Using ultra-fine fly ash, coal gangue and clay to roast into lamellose brick at different temperatures by certain proportion, at the same time, using fly ash to replace ultra-fine fly ash as the contrast group. This paper studies the superiority of using ultra-fine fly ash and coal gangue instead of clay to roast into brick and the mechanism of ultra-fine fly ash sintered material. Research shows that： the brick mixed with ultra-fine fly ash than an equal amount of fly ash has better physical properties after roasting 100 min in 1100 ＊C. Bibulous rate can reach 10%; compressive strength reaches MU30 high-class level; thermal coefficient of conduction is 0.41 W/（m.K）. There are significant characteristics peaks of quartz and mullite on the XRD diffraction pattern of bricks. SEM photos show that quartz cover a small amount of mullite and sintered sample is the dense. TG-DTA thermal mechanism shows that the best sinterning temperature of the sample is 1150℃. The study shows the necessity of ultra-fine fly ash processing.
出处
《非金属矿》
CAS
CSCD
北大核心
2018年第2期7-10,共4页
Non-Metallic Mines
基金
2017年度安徽高校省级自然科学重大研究项目(KJ2017ZD08)
2017年国家级大学生创新创业训练计划项目(201710361052)
关键词
超细粉煤灰
煤矸石
烧结
机理研究
莫来石
ultra-fine fly ash
coal gangue
sinterning
mechanism research
mullite
