Combustion characteristics of Inner Mongolia lignite semi-coke
ZHANG Qingwei
SHEN Baohong
QU Sijian
XIE Qiang
Abstract：In order to use Wulagai lignite (Inner Mongolia) efficiently,taking -6 mm Wulagai lignite as raw material,the test prepared the Wulagai lignite semi-coke in muffle which was used to simulate the industrial carbonization furnace.Then the proximate analysis,calorific value,grindability index,combustion dynamics of semi-coke,relationship between pyrolysis condition and semi-coke combustion charac-teristics were researched.The results showed that,the final temperature of pyrolysis was the main influencing factor,the influence of heating rate and holding time ware not significant.The reaction activity of semi-coke improved with the rise of final temperature and heat preserva-tion time,while the influence on combustion characteristics index was opposite. The semi-coke which was obtained at 600 ℃ pyrolysis had superior calorific value of 24.50 MJ/ kg which was 77% higher than that of raw coal. The combustion characteristics index were 1.4× 10-7%2 / (min2??℃ 3 ),the suitable fuel ratio R ranged from 7 to 9,which was a fine fuel.
Keywords：lignitepyrolysissemi-cokecombustion characteristicactivation energy
Publication Date：2014-01-01
Pages：6( 46-51 )