按质量比为m(污泥):m(盐渍土):m(蒙脱土)=75:20:5的配比,将料球分别烧至1000℃、1050℃、1100℃和1150℃,研究了焙烧温度对污泥陶粒烧胀过程和结构特征的影响.结果表明,1100℃时陶粒的主晶相是石英、蓝晶石和钙长石,1150℃时陶粒的主晶相是莫来石、石英和蓝晶石.莫来石是由蓝晶石转化而来,在高温时形成富硅铝和富钙的液相以及二液分相现象,最后生成莫来石、玻璃体和钙长石.陶粒烧胀的原因是在还原气氛下发生铁碳反应.陶粒内部形成玻璃体为主体,中间有莫来石增强相的结构,陶粒断面形成致密结构和均匀的封闭孔.
With the mass ratio of sludge:saline soil:montmorillonite being 75:20:5,the effect of calcina-tion temperature (1000 ℃,1100 ℃,1050 ℃ and 1150 ℃)on the sintering process and structural characteristics of sludge ceramsite was studied.Results showed that quartz,kyanite and anorthite were the main crystalline phases of ceramsite at 1100 ℃,while the mullite,quartz and kyanite were those of ceramsite at 1150 ℃.Rich silicon aluminum from kyanite and rich calcium from liquid phase were transformed at high temperature,which caused the dual-liquid-phase separation phenomenon.Meanwhile,kyanite was transformed into mullite,and in the end,mullite,vitreous and anorthite were produced.The reason of the burning expansion of the ceramic is the iron carbon reaction under the reduction atmosphere.A compacted structure of ceramsite with a few mullite reinforcing phases can be found in the glass phase,and the uniform and closed pores are formed in ceramsite section.
参考文献
| [1] | 贺君;王启山;任爱玲.污水厂污泥制轻质陶粒研究现状及应用前景[J].城市环境与城市生态,2003(6):13-14. |
| [2] | G.R. Xu;J.L Zou;G.B. Li.Effect of sintering temperature on the characteristics of sludge ceramsite[J].Journal of hazardous materials,20082(2):394-400. |
| [3] | 杜欣;金宜英;张光明;王兴润;聂永丰.城市生活污泥烧结制陶粒的两种工艺比较研究[J].环境工程学报,2007(4):109-114. |
| [4] | 王佳福;吕剑明.利用城市污泥制备陶粒的研究[J].硅酸盐通报,2012(3):706-710. |
| [5] | 刘明伟;许国仁;李圭白.Fe2O3对污泥与底泥制备轻质陶粒性能的影响[J].哈尔滨工业大学学报,2012(10):18-21. |
| [6] | Chen-Chiu Tsai;Kuen-Sheng Wang;Ing-Jia Chiou.Effect of SiO_2-Al_2O_3-flux ratio change on the bloating characteristics of lightweight aggregate material produced from recycled sewage sludge[J].Journal of hazardous materials,20061/3(1/3):87-93. |
| [7] | LIU Junzhe;LIU Rui;HE Zhimin;BA Mingfang;LI Yushun.Preparation and Microstructure of Green Ceramsite Made from Sewage Sludge[J].武汉理工大学学报（材料科学版）（英文版）,2012(1):149-153. |
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