Study on the Influence of Mineralizer on the Structures and Spectral Properties of Calcium Aluminates
ZHENG Huai-li1,LIU Jun-yu2,LI Lin-tao2,LI Fang3
1. Key Laboratory of the Three Gorges Reservoir Region’s Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China 2. College of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China 3. College of Chemistry, Sichuan University, Chengdu 610064，China
Abstract：The present paper investigated the effect of mineralizer on the structure and properties of calcium aluminates formation. Calcium aluminates powder was synthesized under high temperature calcination by mixing bauxite, limestone and a certain amount of mineralizer. The product structure, compositional information and spectral properties were carefully characterized by XRD, IR and DTA-TG, and the mineralization mechanism of mineralizer was studied during the process of calcium aluminates preparation. The results showed that calcium aluminates powder could be obtained under lower temperature calcination after adding mineralizer to the raw materials. The main products of the reaction were CaAl10O18 and CaAl2Si2O8 without mineralizer, however, the main products of the reaction were CaAl3BO7 and Ca3Al10O18 with mineralizer, in which Al2O3 could be extracted easily, while CaAl2Si2O8 was reduced greatly in which Al2O3 could not be extracted easily. At the same time, it is easy for calcspar to decompose after adding mineralizer. It is favorable to Al—Si bond break and Al stripping from bauxite .These facts could improve the extraction rate of Al2O3 from raw materials. Also, in the case of adding mineralizer to the raw mixes, the crystal structure and composition are changed, which is beneficial to reducing calcination temperature.
Key words：Structure of calcium aluminates;Mineralizer;Spectra properties;Mineralization mechanism
郑怀礼1，刘君玉2，李林涛2，李 方3 . 矿化剂对铝酸钙粉的结构与光谱性能的影响[J]. 光谱学与光谱分析, 2009, 29(11): 3028-3032.
ZHENG Huai-li1,LIU Jun-yu2,LI Lin-tao2,LI Fang3 . Study on the Influence of Mineralizer on the Structures and Spectral Properties of Calcium Aluminates. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(11): 3028-3032.
[1] Gaki A, Chrysafi R, Kakali G. Journal of the European Ceramic Society, 2007, 27: 1781. [2] XIA Wei, LEI Ming-kai, LUO Xi-xian, et al(夏 威, 雷明凯, 罗昔贤，等). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2008，28(1)：41. [3] ZHANG Zhan-mei，ZHENG Huai-li，CHEN Chun-yan(张占梅，郑怀礼，陈春艳). Techniques and Equipment for Environmental Pollution Control(环境污染治理技术与设备)，2006，7(6)：52. [4] LU Sheng, FANG Rong-li, XIE Xiao-bin(陆 胜，方荣利，解晓斌). Chemical Industry and Engineering Progress(化工进展), 2003, 22(3): 391. [5] QIN Jing-yan, WANG Yu-jiang, REN He-ping, et al(秦景燕，王玉江，任和平，等). Bulletin of the Chinese Ceramic Society(硅酸盐通报), 2002, 21(3): 51. [6] Asmi D, Low I M, O’Connor B H, et al. Journal of Materials Processing Technology, 2001, 118(1-3): 219. [7] CHENG Feng, HONG Yan-ruo, SUN Jia-lin, et al(陈 峰，洪彦若，孙加林，等). Refractory Material(耐火材料)，2004, 38(6)：417. [8] CHENG Feng, HONG Yan-ruo, SUN Jia-lin, et al(陈 峰，洪彦若，孙加林，等). Refractory Material(耐火材料)，2004, 38 (4): 245. [9] Shahriar Iftekhar, Jekabs Grins, Gunnar Svensson, et al. Journal of the European Ceramic Society，2008, 28(4)：747. [10] YANG Hong-zhang, SUN Jia-lin, ZHANG Rong-hui(杨宏章，孙加林，章荣会). Journal of the Chinese Ceramic Society(硅酸盐学报), 2006，34(4)：452. [11] Kwon Woo-Teck，Kim Young-Phil，Kim Younghee, et al. Materials Science Forum, 2006, 510-511: 622. [12] Ostrowski C，Zelazny J. Journal of Thermal Analysis and Calorimetry, 2004，75(3): 867. [13] Mercurya J M Rivas, Turrillasb X, de Aza A H, et al. Journal of Solid State Chemistry，2006，179：2988. [14] YAO Lin-bo, GAO Zhen-min(姚林波，高振敏). Acta Mineralogica Sinica(矿物学报), 2007, 27(3/4): 255.
