配煤对煤灰熔融特性影响的实验研究  

EXPERIMENTAL STUDY OF THE EFFECT OF COAL BLENDING ON COAL ASH FUSIBILITY

作　　者：焦发存[1] 李慧[1] 邓蜀平[2] 董众兵[1] 

机构地区：[1]安徽理工大学化学工程系,安徽淮南硕士生232001 [2]中国科学院山西煤化所,太原高级工程师030001

出　　处：《煤炭转化》2006年第1期11-14,18,共5页Coal Conversion

基　　金：安徽省教委自然科学基金资助项目(2004kj125);淮南市重大科技项目(2003001).

摘　　要：高灰熔点淮南煤A分别与低灰熔点煤G和B按不同配比相配,制成两种配煤灰样,用5E-AF型智能灰熔点测定仪测定其在弱还原性气氛下的熔融特征温度,利用X射线衍射(XRD)分析了配煤灰样在不同温度和不同配比下矿物组成的变化.结果表明,配煤能有效改善煤灰熔融特性,配煤灰熔点与配比之间是非线性关系;高温下矿物形态的转变是导致配煤煤灰灰熔点变化的主要原因,莫来石有增高灰熔点的作用,石英与钙长石和铁橄榄石等矿物共存时,能够形成低熔点的共晶体使得灰熔点降低.The ash fusibility of two kinds of blended coal samples were studied in weakly reducing atmosphere by 5E-AF Ⅱ Smart Ash Fusion Analyzer. The transformation of mineral composition under the different temperature and blended coal ratios were examined by X-ray diffraction （XRD）. The results show that the ash fusibility can be improved effectively by coal blending and the relationship between ash fusion points and blending coal ratios is nonlinear. Transformation of mineral matters results in the change of ash fusion point. Mullite derived from the clay mineral in high temperature can increase ash fusion point. Quartz, anorthite and fayalite coexisting in blends will produce a low-melting eutectic mixture which decreases the ash fusibility temperature.

关 键 词：配煤 灰熔融特性 化学组成 矿物组成 相图 

分 类 号：TQ533[化学工程—煤化学工程]