化工进展
化工進展
화공진전
CHEMICAL INDUSTRY AND ENGINEERING PROGRESS
2014年
5期
1142-1150
,共9页
李艳红%赵文波%常丽萍%王美君%王平艳%杨荣
李豔紅%趙文波%常麗萍%王美君%王平豔%楊榮
리염홍%조문파%상려평%왕미군%왕평염%양영
热塑性%炼焦机理%焦炭质量预测%矿物质
熱塑性%煉焦機理%焦炭質量預測%礦物質
열소성%련초궤리%초탄질량예측%광물질
thermoplastic%coking mechanism%coke quality prediction%mineralogy
综述了煤的热塑性、炼焦机理和焦炭质量预测的研究进展。煤的化学结构如煤中镜质组的烷基侧链和移动氢的含量决定了煤的热塑性,核磁共振、质子磁共振热分析、拉曼光谱和电子顺磁共振谱等从分子水平解释煤的热塑性、配合煤的相互作用和炼焦机理。塑性成焦机理认为,良好的氢传递和分子重排是炼焦中获得优质焦炭的重要条件,塑性成分在焦炭光学组织形成中非常关键,改变加热速率可使煤的光学组织形成机理改变。碱度指数(modified basicity index,MBI)、复合焦势(composite coking potential,CCP)和组合煤指数(combined coal index,CCI)等参数可精确地预测焦炭反应后强度和焦炭反应性。矿物质对焦炭强度的影响是研究热点,控制焦炭的裂纹和尺寸是未来焦炭质量的要求。
綜述瞭煤的熱塑性、煉焦機理和焦炭質量預測的研究進展。煤的化學結構如煤中鏡質組的烷基側鏈和移動氫的含量決定瞭煤的熱塑性,覈磁共振、質子磁共振熱分析、拉曼光譜和電子順磁共振譜等從分子水平解釋煤的熱塑性、配閤煤的相互作用和煉焦機理。塑性成焦機理認為,良好的氫傳遞和分子重排是煉焦中穫得優質焦炭的重要條件,塑性成分在焦炭光學組織形成中非常關鍵,改變加熱速率可使煤的光學組織形成機理改變。堿度指數(modified basicity index,MBI)、複閤焦勢(composite coking potential,CCP)和組閤煤指數(combined coal index,CCI)等參數可精確地預測焦炭反應後彊度和焦炭反應性。礦物質對焦炭彊度的影響是研究熱點,控製焦炭的裂紋和呎吋是未來焦炭質量的要求。
종술료매적열소성、련초궤리화초탄질량예측적연구진전。매적화학결구여매중경질조적완기측련화이동경적함량결정료매적열소성,핵자공진、질자자공진열분석、랍만광보화전자순자공진보등종분자수평해석매적열소성、배합매적상호작용화련초궤리。소성성초궤리인위,량호적경전체화분자중배시련초중획득우질초탄적중요조건,소성성분재초탄광학조직형성중비상관건,개변가열속솔가사매적광학조직형성궤리개변。감도지수(modified basicity index,MBI)、복합초세(composite coking potential,CCP)화조합매지수(combined coal index,CCI)등삼수가정학지예측초탄반응후강도화초탄반응성。광물질대초탄강도적영향시연구열점,공제초탄적렬문화척촌시미래초탄질량적요구。
Coal thermoplasticity,coking mechanism and coke quality prediction are reviewed. Coal chemical structures control thermoplastic behavior of coal,such as alkyl side chains of vitrinite and mobile hydrogen content. HNMR,proton magnetic resonance thermal analysis,Raman and electron paramagnetic resonance spectroscopy provide valuable information for interpreting thermoplasticity, synergistic effects of coal blend and coking mechanism. Hydrogen transfer and molecular rearrangement are also important in the development of plasticity,and a plasticizing component is important for coke texture formation. It is also possible to pass from one mechanism to the other by changing heating rate during carbonization. Modified basicity index,composite coking potential and combined coal index of coal blend are correlated with coke strength after reaction and coke reactivity index. The effect of mineral matter on coke strength and reactivity are the focus of study. There is still much work to do in the control of fractures and coke size to guarantee coke quality.