二次铝灰部分替代矾土制备铝酸盐水泥  

Preparation of aluminate cement by using the secondary aluminum ash as a partial substitute for alumina

作　　者：马文青 李灿华 都刚 李家茂[2] 李明晖 MA Wenqing;LI Canhua;DU Gang;LI Jiamao;LI Minghui(School of Metallurgical Engineering,Anhui University of Technology,Ma’anshan 243002,Anhui,China;School of Materials Science and Engineering,Anhui University of Technology,Ma’anshan 243002,Anhui,China)

机构地区：[1]安徽工业大学冶金工程学院,安徽马鞍山243002 [2]安徽工业大学材料工程学院,安徽马鞍山243002

出　　处：《有色金属科学与工程》2024年第4期527-534,共8页Nonferrous Metals Science and Engineering

基　　金：安徽工业大学人才启动基金资助项目(DT18100039)。

摘　　要：针对铝酸盐水泥原料矾土资源稀缺、价格昂贵的问题,本文探究了二次铝灰部分替代矾土作为原料制备铝酸盐水泥的可行性。煅烧实验结果表明,Al_(2)O_(3)含量60%、煅烧温度1350℃、保温时间1 h为较优的制备条件,掺入标准砂进行自然养护,对水化3 d和28 d的铝酸盐水泥进行SEM和EDS表征,在此条件下获得的铝酸盐水泥熟料矿物相为二铝酸钙、钙铝黄长石及少量铝酸一钙。水化28 d的铝酸盐水泥抗压强度达到85.5 MPa,抗折强度达到11.5 MPa,表明二次铝灰可部分替代矾土用于制备铝酸盐水泥。In response to the scarcity and high cost of bauxite,a raw material for aluminate cement,this study explored the feasibility of preparing aluminum cement by using secondary aluminum ash as a substitute for bauxite.The calcination experiment results showed that the optimal preparation conditions were an Al_(2)O_(3) content of 60%,a calcination temperature of 1350℃,and an insulation time of 1 h.The aluminate cement samples were mixed with standard sand for natural curing.SEM and EDS analysis were conducted on the hydrated aluminate cement samples at 3 and 28 d,respectively.Under these conditions,the mineral phases obtained in the aluminate cement clinker were dicalcium aluminate,gehlenite,and a small amount of tricalcium aluminate.The compressive strength of the aluminate cement hydrated for 28 d reached 85.5 MPa,and the flexural strength 11.5 MPa,proving that the secondary alumina ash can be used as a partial substitute for bauxite to prepare aluminate cement.

关 键 词：二次铝灰 铝酸盐水泥 煅烧矿物相 早期强度 

分 类 号：X75[环境科学与工程—环境工程] TU53[建筑科学—建筑技术科学]