低硅铁尾矿制备建筑陶粒及其性能研究  

Study on preparation and performances of building ceramisite with low silica iron tailings

作　　者：王德民 胡百昌 储腾跃 赵学超 

机构地区：[1]武汉三源特种建材有限责任公司,湖北武汉430083

出　　处：《新型建筑材料》2016年第2期36-38,51,共4页New Building Materials

摘　　要：以低硅铁尾矿为主要原料,黏土为粘结剂,煤粉和KD粉为造孔剂,对铁尾矿建筑陶粒配方进行了研究,并以筒压强度、吸水率、堆积密度和显气孔率为主要指标考察了造孔剂选择、物料配比和焙烧工艺对烧成陶粒性能的影响。结果表明:铁尾矿建筑陶粒原料铁尾矿、黏土、煤粉和KD粉的适宜质量配比为83:8:3:6,铁尾矿利用率高达80%以上;在焙烧温度1160℃和保温时间60min的条件下,烧成陶粒符合GB/T 17431.1—2010《轻集料及其试验方法》中900级轻粗集料的技术要求;微观SEM图像显示陶粒内部疏松多孔,XRD图像表明焙烧过程中生成了硅酸盐类新物质碱玄岩。Taking a low silicon iron tailings as the main raw material and clay as binder, building ceramisite was produced by adding the pore-forming agent of coal dust and KD dust. Using cylinder compressive strength,water absorption,bulk density and apparent porosity rate as the main indexes,performances of ceramisite were analyzed by selection of pore-forming agent,ratio of raw materials and sintering parameters. The results indicated that the suitable formula for ceramisite is the mass ratio of iron railings, clay,coal dust,and KD dust is 83：8：3：6. Comprehensive utilization of the iron tailings is more than 80%. Under the heat preserva- tion for 60 min at 1160 ~C,the ceramisite that meets the level 900 light coarse aggregate in standard GB/T 17431.1--2010 ＂Light aggregate and its test method＂ can be produced. Inside of eeramisite was porous from SEM images,and tephrite as new crystalline of silicates emerged during sintering from XRD images.

关 键 词：低硅铁尾矿 建筑陶粒 碱玄岩 性能 

分 类 号：TU52[建筑科学—建筑技术科学]