煅烧温度对铝型材厂污泥晶相结构的影响  

POLYCRYSTALLINE STRUCTURE OF WASTE SLAG IN ALUMINUM FACTORY AT DIFFERENT CALCINING TEMPERATURE

作　　者：曾令可[1] 牛艳鸽[1] 刘艳春[1,2] 王慧[1] 彭志杰 刘平安[1] 税安泽[1] 程小苏[1] 

机构地区：[1]华南理工大学材料科学与工程学院,广州510640 [2]广州锐得森特种陶瓷有限公司,广州510435 [3]佛山市新合铝业有限公司,佛山528226

出　　处：《中国陶瓷》2009年第8期30-33,共4页China Ceramics

基　　金：广东省科技攻关项目;编号:2008B010600038

摘　　要：铝型材厂污泥的主要成分是γ-AlOOH,其中部分是晶体,部分是无定形体。本研究将污泥分别于450℃、600℃、800℃、900℃、1000℃和1200℃进行了煅烧,探讨污泥在不同温度下的晶相变化,采用化学全分析、XRD和SEM表征了污泥的化学组成,在不同温度下的晶相结构和显微结构,为对其进行充分而有效的回收利用提供理论依据。实验结果表明:与常规的转化规律不同,污泥在450℃、600℃和800℃的试样中均形成了γ-Al2O3和无定形结构的微晶,随着温度的升高,γ-Al2O3的含量增加而无定形体的含量降低;当煅烧温度上升至1000℃时,γ-Al2O3全部转化为α-Al2O3。The waste slag of aluminum factory composed of crystalline γ-AlOOH and amorphous solid was calcined at 450℃, 600℃, 800℃, 900℃, 1000℃ and 1200℃ respectively. Its chemical composition, their polycrystatline structures and microstructures were characterized by analysis of chemical composition, XRD and SEM and the results can provide us suitable data for its comprehensive applications. Both γ-Al2O3 and amorphous solid were formed in the samples at 450℃ , 600℃ and 800℃ . The contents of γ-Al2O3 increase and amorphous solid decrease with the rise of calcining temperature, and they are completely transformed into α-Al2O3 when the temperature increased up to 1000V .

关 键 词：铝厂污泥 Γ-AL2O3 Α-AL2O3 晶相结构 

分 类 号：TQ174.4[化学工程—陶瓷工业]