【作者】 穆松； 马保国； 王耀城； 蹇守卫；

【Author】 MU Song MA Bao-guo WANG Yao-cheng JIAN Shou-wei (Key Laboratory for Silicate Materials Science and Engineering of Ministry of Education, Wuhan University of Technology, Wuhan 430070, China)

【机构】 武汉理工大学硅酸盐材料工程教育部重点实验室；

【摘要】 我国现有大量煤矸石的产生与堆存占用了大量土地,并导致严重的环境污染,因此,综合高效大量利用煤矸石是迫切需要解决的问题。研究了高掺量煤矸石多孔烧结制品在不同烧结温度下的物理力学性能、烧成收缩率、体积密度与孔型特征。结果表明,当烧成温度增加至1100℃时,全煤矸石试样(B100)和煤矸石-页岩试样(B70a30和B50a50)均发生较大的体积变形,各试样体积变化的程度为:B50a50>B70a30>B100。在相同的烧成温度下,与全煤矸石试样相比较,掺入塑化剂页岩的试样具有较好的强度与高的收缩率。与全煤矸石比较,在相同的烧结温度条件下,掺加了塑化剂页岩的试样具有较低的24h吸水率与显气孔率,满足如下规律:B50a50<B70a30<B100。SEM表明1000℃时,B50a50试样存在大量1～20μm的连通性圆形孔洞,表现为无序分布;此外,还存在少量大小约为1～10μm的封闭性气孔。更多还原

【Abstract】 Production and pile-up of large amount of coal gangues results in serious environment pollution and taking up much land in China.Therefore,it is a urgent problem for us to utilize comprehensively and effectively coal gangue.This paper studied performance of sintered porous product with addition of high amount of coal gangue at different temperatures,including physical mechanical performance,sintering linear shrinkage,vol- ume density and porous characteristic.Results show that pure coal gangue sample (B100) and coal gangue-shale sample (B70a30 and B50a50)produce relative high volume change at 1100℃,the degree of sample volume change was BS0a50>B70a30>B100.At the same temperature,samples with addition of shale as a plasticizer have better strength and high shrinkage than pure coal gangue sample.Besides,24h water absorption and ap- parent porous of samples with addition of shale were lower than that of pure coal gangue,and the sequence was B50a50<B70a30<B100.SEM photograph indicates that there are lots of 1-20μm connected pores distributed into B50a50 sample.Besides,1-10μm closed pores can be seen into the sample too.更多还原