摘要
利用X-射线荧光分析仪、X-射线衍射仪、光学显微镜、扫描电子显微镜等手段研究了Texaco气化炉炉渣的化学组成、物相组成、岩相结构和显微结构;并利用气化炉渣为主要原料制备了墙体材料,采用碳热还原氮化法合成了sialon粉体,结果表明:1)Texaco煤气化炉炉渣主要化学成分为SiO2,Al2O3,CaO和残余碳,其中含有很高的玻璃相和不定形物质;2)气化炉渣为多孔结构,残余碳多为海绵状多孔结构,不定形玻璃相较为致密;3)当气化炉渣磨细粉添加量达到70%时经烧成可制得MU7.5以上墙体材料,烧成试样体积密度较低,可望保温隔热;4)利用气化炉渣为主要原料,通过碳热还原氮化可合成主要成分为Ca-α-sialon和β-sialon的粉体.
X-ray fluorescence spectrometry（XRF）, X-ray powder diffractometry（XRD）, optical microscope（OM） ,scanning electron microscopy（SEM）were used to investigated the chemical composi- tion, phase constituents, petrographical structure and microstructure of gasification slag from Texaco gasifier. Building materials were fabricated using gasification slag as main raw materials. Sialon powders were synthesized by carbothermal reduction nitrodation of gasification slag. The results showed that： 1） The main chemical constituents of gasification slag are SiO2, Al2O3, CaO and residual carbon. The main phase are vitreous glass and amorphous carbon, minor phase are quartz and calcite; 2） Gasification slag is porous. Residual carbon is sponge-like structure and vi- treous glass is dense; 3） Building materials above MU7.5 can be manufactured when 70% gasifi- cation slag fine is added. The sample fired which has lower volume density has characteristic of thermal-resistance; 4） Sialon powders with Ca-a-sialon and β-sialon as main crystalline phases can be synthesized by carbotherma[ reduction method using gasification slag as raw materials.
出处
《煤炭转化》
CAS
CSCD
北大核心
2009年第4期30-33,共4页
Coal Conversion
关键词
气化炉渣
组成
显微结构
墙体材料
赛隆
gasification slag, composition, microstructure, building materials, sialon
