煤炭转化2012，Vol.35Issue(4)：7-10,25,5.
含钙矿物对褐煤灰熔融特性的影响研究
EFFECTS OF THE CALCIUM MINERALS ON MELTING CHARACTERISTICS OF LIGNITES ASH
摘要
Abstract
By the methods of acid decalcification and added minerals, the effects of different fractions in calcium mineral and its contents on lignite ash melting characteristics were investigated on the ash fusion temperature analyzer. The results show that calcium oxide micro-crystallites, which generated from ashing process of organic calcium, are more easily interact with other minerals and form glassy materials, or low melting point eutectic materials (e. g. anorthite, gehlenite) , than calcium oxide particles from the transformation of inorganic calcium minerals, and results in the drop of lignite ash melting point. Both two lignite ash melting points firstly decreased, and then increased with the increase of calcium oxide content, and when the calcium oxide content is in the range of 30%-35%, the ash melting point is the lowest. With the increase of calcium oxide content, the position of HLH ashes in SiO2-Al2O3-CaO three phase diagrams moves from high melting point mullite district to the lower melting point of anorthite and gehlenite area, finally reaches the high melting point di-calcium silicate zone, and XLT ashes move from anorthite to gehlenite to di-calcium silicate zone.关键词
褐煤/灰熔融特性/含钙矿物质Key words
lignite/ash melting characteristics/calcium minerals分类
化学化工引用本文复制引用
李风海,贾建波,黄戒介,房倚天..含钙矿物对褐煤灰熔融特性的影响研究[J].煤炭转化,2012,35(4):7-10,25,5.基金项目
国家高技术研究发展计划(863)项目(2008AA050302)、中国科学院知识创新项目(KGGX2-YW-320)和煤转化国家重点实验室开放基金资助项目(J12-13-102). （863）
