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Effect of Different Chemical Composition on Coal Melting Characteristics under Weak Reducing Atmosphere

ZHU Jin-meng;CAI Hui-wu;DANG Nan-nan;College of Chemistry and Chemical Engineering,Xi'an University of Science and Technology;  
In this paper,the effect of kaolin,Ca2SiO3,Fe2O3,CaO,Al2O3,SiO2 on the fusion of characteristics of Ningxia coal ash under the weak reducing atmosphere was studied.The results indicate that: with the steadily added quantity of SiO2,Al2O3,Fe2O3 and CaO,the ash fusion temperatures would all be first decreasing and then increasing; acidic mineral kaolin can significantly improve the ash temperature; alkaline mineral Ca2SiO3 can reduce the fusion temperature of the ash.In a certain temperature range,kaolin,Al2O3 and SiO2can improve the ash fusion temperature,and kaolin is better;Ca2SiO3,Fe2O3 and CaO can reduce the ash fusion temperature,and the effect of Ca2SiO3 is more obvious.
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