煤矸石可燃组分对铅锌尾矿陶粒性能的影响%Effects of Combustible Components of Coal Gangue on Properties of Lead-Zinc Tailing Ceramsite
河南省科学院 河南建筑材料研究设计院有限责任公司 郑州大学材料科学与工程学院 河南郑矿机器有限公司
2024-12-31
陶粒 煤矸石 可燃组分 铅锌尾矿 重金属固化
本论文研究了煤矸石中碳和硫可燃组分对陶粒物理性能和重金属固化性能的影响,采用XRD和SEM等测试方法分析了陶粒物相组成和微观结构变化。结果表明,煤矸石中的碳和硫可燃组分会增加陶粒的表观密度和抗压强度,显著降低吸水率,并减弱陶粒的重金属固化能力,但所制得的陶粒满足环境安全性要求。碳和硫组分的加入可以改善陶粒的高温反应,促进莫来石和石英转化为钙长石。碳和硫组分低温时具有燃烧造孔作用和高温时具有增加液相作用,可以降低陶粒的开气孔含量。%In this paper,the effects of carbon and sulfur combustible components from coal gangue on the physical properties and heavy metal solidification properties of ceramsite were studied.The phase composition and microstructure changes of ceramsite were analyzed by XRD and SEM.The results show that the carbon and sulfur combustible components in coal gangue increase the apparent density and compressive strength of ceramsite,significantly reduce the water absorption and weaken the heavy metal solidification ability of ceramsite.The prepared ceramsite meets the environmental safety requirements.The addition of carbon and sulfur components could promote the transformation of mullite and quartz into anorthite and reduce the content of open pores due to the effects of forming pores by combustion at low temperature and increasing liquid phase at high temperature.
