%0 Journal Article
%T Effect of mineral composition on coal ash fusion temperature<br>煤灰中矿物质组成对煤灰熔融温度的影响
%A LU Tao
%A ZHANG Lei
%A ZHANG Ye
%A FENG Yun
%A LI Han-xu
%A <br>芦涛
%A 张雷
%A 张晔
%A 丰芸
%A 李寒旭
%J 燃料化学学报
%D 2010
%I 
%X Nine different fusion temperature coals were selected, and the relationship between ash fusion temperature and ash mineral composition and content were studied by using XRD. The mineral transformation of typical coal ashes in reducing atmosphere was also investigayed. The results show that the mineral phases of coal ashes which are ashed at 815 ℃ mainly include quartz, anhydrite, hematite, portlandite, lime and potash feldspar. Higher anhydrite and hematite content and lower portlandite content would result in lower ash fusion temperature. As the heating temperature increases, the content of quartz, anhydrite and portlandite in coal ash decreases in reducing conditions and some new mineral phases are formed. Mullite is formed, which leads to higher ash fusion temperature. However, the formation of anorthite and hedenbergite at 1 100 ℃ in the heating process is the main reason for the ash melting temperature lowing.
%K X-ray diffraction(XRD)
%K coal ash
%K mineral composition
%K ash fusion temperature<br>
%K X-射线衍射
%K 煤灰
%K 矿物组成
%K 灰熔融温度
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=C6AB115B41BD2F1616ECDB095B69B8ED&aid=ABB9904A31DF3B9765284969A0A7D030&yid=140ECF96957D60B2&vid=16D8618C6164A3ED&iid=CA4FD0336C81A37A&sid=EA389574707BDED3&eid=D3E34374A0D77D7F&journal_id=0253-2409&journal_name=燃料化学学报&referenced_num=1&reference_num=10