摘要
以钒尾矿为主要硅铝原料制备陶粒,对粉煤灰和黏土的添加比例、制粒工艺参数、焙烧制度进行了系统的研究。结果表明,质量比为6∶3∶1的钒尾矿、粉煤灰、黏土混合料,在制粒水分为8%,制粒时间为20 min,生陶粒预热温度为350℃,预热时间为30 min,焙烧温度为1 180℃,焙烧时间为12 min时,制得的陶粒堆积密度为691kg/m3,吸水率为1.4%,筒压强度为10.7 MPa。XRD和SEM分析表明,在由钒尾矿生成陶粒的过程中生成了莫来石,并产生了对陶粒强度起支撑作用的非晶态凝胶相。
Took stone-coal vanadium tailing as the main Si-Al materials for ceramsite synthesis,the influence of the content of the clay and the fly ash,pellitezation parameters and roasting conditions was studied.The results show that when the ratio of vanadium tailing,fly ash and clay is 6∶3∶1,granulating water is 8%,granulating time is 20 min,the green balls are roasted when preheating temperature is 350 ℃,the time is 30 min and the roasting temperature is 1 180 ℃ and the time 12 min.The bulk density of porcelain granule is 691 kg/m3,the water absorption is 1.4% and the compression strength is 10.7 MPa.XRD and SEM analysis indicate that in the process of ceramsite synthesis,mullite and amorphous state has been generated,which significantly affects the strength of ceramsite.
出处
《金属矿山》
CAS
北大核心
2012年第1期161-165,共5页
Metal Mine
基金
"十二五"国家科技支撑计划重点项目(编号:2011BAB05B04)
关键词
钒尾矿
陶粒
原料配比
性能指标
Vanadium tailing
Ceramsite
Ratio of materials
Performance index
