Influence of briquetting and pyrolysis on lignite slurryability
GAO Jingjing
CHU Mo
LYU Hailong
ZHAO Man
YANG Xiaomin
Abstract：To improve the slurryability of lignite,taking Xinjiang lignite,lignite semi-coke and briquette semi-coke as raw material,com-pare their slurryability.The results show that the optimum gradation of semi-coke is that the mass ratio of coarse powder and fine powder is 6 ∶ 4,the best dosage of additives is 1.2%,the greatest coal water mixture( CWM) concentration is 60.1%,the apparent viscosity is 1153 mPa.s.Under the same gradation and additives dosage,the greatest CWM concentration of lignite and semi-coke are 48.7% and 56.8%. Proximate analysis and the surface structure research of coal sample show that the moisture and volatile of Xinjiang lignite,semi-coke and briquette semi-coke decrease,fixed carbon increase,the pore radius decrease,specific surface area increase,pore volume change is not ob-vious with the increase of upgrading modification.So for lignite,upgrading and modification can improve the degree of coalification and slur-ryability,make the structure more close,decrease the porosity.
Keywords：lignitesemi-cokebriquette semi-cokecoal water mixtureslurryabilitycoal quality characteristicsurface structure
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 51-54 )