王冲,刘勇兵,曹占义,张元源,陈永弟

• 1:吉林大学材料科学与工程学院
• 2:长春师范学院工程学院

摘要(Abstract)：

以长白山地区白云石为实验对象,在不同温度、不同时间下进行煅烧实验,通过TG和DTA等热分析手段,以及利用XRD和SEM对白云石分解前后的组织结构进行观察分析,确定了白云石分解过程及相应的组织转变过程。结果表明:长白山地区白云石中的MgO和CaO的分子比为1:1,矿物呈隐晶质组织。热分解过程分两步完成:第一步反应:CaMg(CO3)2=CaCO3+MgO+CO2↑,第二步反应:CaCO3=CaO+CO2↑;最佳煅烧参数是:煅烧温度700℃,恒温时间3 h。此外,在930℃下恒温煅烧3 h开始形成团聚结构,白云石表面过烧活性降低。

关键词(KeyWords)： 白云石;煅烧;显微结构

Abstract:

Keywords:

基金项目(Foundation): 国家高技术研究发展“863计划”资助项目(2002AA001022)

作者(Author): 王冲,刘勇兵,曹占义,张元源,陈永弟

DOI: 10.13289/j.issn.1009-6264.2013.02.006

参考文献(References)：

• [1]冯小平,张正文,谢峻林.轻烧白云石的煅烧工艺对活性度的影响[J].矿产综合利用,2007(1):13-15,25.FENGXiao-ping,ZHANG Zheng-wen,XIE Jun-lin.The influence of calcining technology on the activity of light-burned dolomite[J].MultipurposeUtilization of Mineral Resources,2007(1):13-15,25.
• [2]Claudio Delle Piane,Luigi Burlini,Bernard Grobety.Reaction-induced strain localization:Torsion experiments on dolomite[J].Earth and PlanetaryScience Letters,2007,256(1-2):36-46.
• [3]金奕,周云,余亮,等.白云石显微结构与其冶金性能的关系[J].安徽工业大学学报,2007,24(3):236-238.JIN Yi,ZHOU Yun,YU Liang,et al.Relationship of the microstructure and the metallurgical performance of the dolomite[J].Journal of AnhuiUniversity of Technology,2007,24(3):236-238.
• [4]林有希,高诚辉,陈明辉.碳酸钙晶须增强聚醚醚酮自润滑复合材料的动态力学行为[J].材料热处理学报,2009,31(6):36-40.LIN You-xi,GAO Cheng-hui,CHEN Ming-hui.Dynamic mechanical behavior of CaCO3 whisker and polytetrafluoroethylene filled polyetheretherketonecomposites[J].Transactions of Materials and Heat Treatment,2009,31(6):36-40.
• [5]Galai H,Pijolat M,Nahdi K,et al.Mechanism of growth of MgO and CaCO3 during a dolomite partial decomposition[J].Solid State Ionics,2007,178(15):1039-1047.
• [6]Beruto D T,Vecchiattini R,Giordani M.Solid products and rate-limiting step in the thermal half decomposition of natural dolomite in a CO2(g)atmosphere[J].Thermochimica Acta,2003,405:183-194.
• [7]潘波,尹国祥,高心魁,等.烧结温度对MgO-CaO材料结构和性能的影响[[J].材料热处理学报,2010,31(6):1-6.PAN Bo,YIN Guo-xiang,GAO Xin-kui,et al.Influence of sintering temperature on microstructure and property of MgO-CaO material[J].Transactionsof Materials and Heat Treatment,2010,31(6):1-6.
• [8]Katia Gallucci,Stefano Stendardo,Pier Ugo Foscolo.CO2 capture by means of dolomite in hydrogen production from syn gas[J].International Journalof Hydrogen Energy,2008,33(12):3049-3055.
• [9]谢晓丽,严云,胡志华.白云石煅烧制备水泥基胶凝材料的实验研究[J].非金属矿,2011,34(2):32-35,49.XIE Xiao-li,YAN Yun,HU Zhi-hua.Experimental study on preparation of cementitious material from calcined dolomite[J].Non-Metallic Mines,2011,34(2):32-35,49.

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