晶化时间对钢渣微晶玻璃结构和性能的影响  

Effect of crystallization time on micro structure and properties of steel slag based glass-ceramics

作　　者：张凯[1] 武文斐[1,2] 李保卫[2] 

机构地区：[1]内蒙古科技大学能源与环境学院,内蒙古包头014010 [2]内蒙古科技大学白云鄂博矿稀土及铌资源高效利用省部共建教育部重点实验室,内蒙古包头014010

出　　处：《华中科技大学学报（自然科学版）》2014年第5期71-74,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：内蒙古自治区高等学校科学技术研究资助项目(NJZY13130)

摘　　要：以熔融热态钢渣为起始原料,在高温状态下加入质量比为1.0∶1.5的石英砂对钢渣进行调质,得到的钢渣玻璃熔体采用熔融法制备微晶玻璃.利用差热分析（DTA）、X射线衍射（XRD）、扫描电子显微镜/能谱仪（SEM/EDS）研究晶化时间对微晶玻璃析晶和性能的影响.结果表明：微晶玻璃的主晶相为透辉石[（Mg6Al2Fe2）Ca（Si1.5Al5）O2],晶体形貌为块状,直径约为10～20μm,分布均匀.随着晶化时间的增加,样品的密度、显微硬度、耐腐蚀性呈逐渐增强的变化趋势.经700℃核化2h,900℃晶化5h后的微晶玻璃综合性能较好.Simulated molten steel slag was used as raw materials to prepare glass-ceramics using melting-quenching method. Quartz sand was added in to adjust the steel slag component with the mass ratio of 1.0 ： 1.5. Effect of crystallization time on the structure and properties of steel slag based glass- ceramics was studied by differential thermal analysis （DTA）, X-ray diffraction （XRD）, scanning electron microscope （SEM） and energy dispersive X-Ray spectrometer （EDS）. The results show that the main phases in glass-ceramics samples are diopside [- （Mg6 A12 Fe2 ） Ca （Si1. 5 Al5 ）O2 ]. Granular crystals are uniformly distributed in the glass matrix with an average particle size of 10～20μm. With theincrease of crystallization time, the density, corrosion resistance, and micro hardness increase gradually. The sample has good comprehensive properties after nucleation at 700℃ for 2 h, followed by crystallization at 900℃ for 5 h.

关 键 词：资源循环利用 热态钢渣 晶化时间 节能减排 微晶玻璃 微观结构 

分 类 号：TD981[矿业工程—选矿]