固废资源合成堇青石工艺及其性能研究  

Synthesis technology and properties of cordierite from solid waste resources

作　　者：谭栖桐 赵惠忠[1] 余俊[1] 张寒[1] 谈利强 Tan Qitong;Zhao Huizhong;Yu Jun;Zhang Han;Tan Liqiang(不详;The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,湖北武汉430081 [2]浙江父子岭特种耐火材料有限公司,浙江湖州313108

出　　处：《耐火材料》2024年第3期185-189,共5页Refractories

基　　金：辽宁省科技攻关项目(2022JH1/1080005)。

摘　　要：为了合理利用固废资源、缓解资源紧张,根据堇青石的化学组成,以质量分数分别为12%的电熔镁砂收尘粉、40%的电熔刚玉收尘粉、48%的石英尾砂为原料,分别在1320、1350、1380、1390、1400、1410℃保温3 h煅烧,制备堇青石质耐火原料,研究了煅烧温度对堇青石试样相组成、显微结构、物理性能等的影响。结果表明:在1390℃之前,镁铝尖晶石和方石英逐渐反应生成堇青石直至方石英相完全消除,当煅烧温度达到1390℃时,试样中的堇青石相含量达94%(w),次晶相为镁铝尖晶石,此时试样的热膨胀系数最低,为3.2×10^(-6)℃^(-1),体积密度较低,为1.85 g·cm^(-3),热导率较低,为1.279 W·(m·K)^(-1),显微结构较致密,综合性能最优。To effectively utilize solid waste resources and relieve resource constraints,cordierite refractory raw materials were prepared according to the chemical composition of cordierite,using 12 mass%fused magnesia dust powder,40 mass%fused corundum dust powder and 48 mass%quartz tailings as starting materials,calcining at 1320,1350,1380,1390,1400 and 1410℃for 3 h,respectively.The effects of the calcination temperature on the phase composition,microstructure and physical properties of the cordierite specimens were studied.The results show that below 1390℃,magnesium aluminate spinel and cristobalite gradually react to form cordierite until cristobalite is completely exhausted;when the calcination temperature reaches 1390℃,the cristobalite content in the sample reaches 94 mass%,and the secondary crystal phase is magnesium aluminate spinel;at this time,the sample has the optimal comprehensive performance:the lowest thermal expansion coefficient of 3.2×10^(-6)℃^(-1),a low bulk density of 1.85 g·cm^(-3),a low thermal conductivity of 1.279 W·(m·K)^(-1)and dense microstructure.

关 键 词：电熔刚玉收尘粉 电熔镁砂收尘粉 石英尾砂 固相合成法 堇青石 

分 类 号：TQ175[化学工程—硅酸盐工业]