有色金属科学与工程
有色金屬科學與工程
유색금속과학여공정
JIANGXI NONFERROUS METALS
2014年
3期
21-27
,共7页
刘肖%刘起航%湛文龙%梁磊%任海亮%吴铿
劉肖%劉起航%湛文龍%樑磊%任海亮%吳鏗
류초%류기항%담문룡%량뢰%임해량%오갱
熔融气化炉%块煤成焦和粉化%矿相微观结构%风口试样
鎔融氣化爐%塊煤成焦和粉化%礦相微觀結構%風口試樣
용융기화로%괴매성초화분화%광상미관결구%풍구시양
melter gasifier%coal pyrolysis and pulverization%mineral microstructure%tuyere sample
采用200 kg级炼焦炉对熔融气化炉主要使用的2种块煤进行了不同时间的半焦裂解试验,比较了2种块煤成焦后的粒度分布和强度变化,发现B煤在炼焦炉内粉化严重,随结焦时间的延长其粒度降解度一直在升高,而A煤降解度在达到最大值后开始下降.对比了2种块煤生成半焦的矿相微观结构,A煤生成的半焦主要以镶嵌结构和各向同性结构为主,而B煤生成的半焦主要以类丝炭和各向同性结构为主;2种半焦均含有未成焦煤.通过分析熔融气化炉内取出的风口试样中不同粒度的含碳物质其矿相微观结构,认为在炉缸内<6.3 mm的颗粒由2种块煤裂解成焦后的粉化现象所引起,且B煤的粉化是主要因素.
採用200 kg級煉焦爐對鎔融氣化爐主要使用的2種塊煤進行瞭不同時間的半焦裂解試驗,比較瞭2種塊煤成焦後的粒度分佈和彊度變化,髮現B煤在煉焦爐內粉化嚴重,隨結焦時間的延長其粒度降解度一直在升高,而A煤降解度在達到最大值後開始下降.對比瞭2種塊煤生成半焦的礦相微觀結構,A煤生成的半焦主要以鑲嵌結構和各嚮同性結構為主,而B煤生成的半焦主要以類絲炭和各嚮同性結構為主;2種半焦均含有未成焦煤.通過分析鎔融氣化爐內取齣的風口試樣中不同粒度的含碳物質其礦相微觀結構,認為在爐缸內<6.3 mm的顆粒由2種塊煤裂解成焦後的粉化現象所引起,且B煤的粉化是主要因素.
채용200 kg급련초로대용융기화로주요사용적2충괴매진행료불동시간적반초렬해시험,비교료2충괴매성초후적립도분포화강도변화,발현B매재련초로내분화엄중,수결초시간적연장기립도강해도일직재승고,이A매강해도재체도최대치후개시하강.대비료2충괴매생성반초적광상미관결구,A매생성적반초주요이양감결구화각향동성결구위주,이B매생성적반초주요이류사탄화각향동성결구위주;2충반초균함유미성초매.통과분석용융기화로내취출적풍구시양중불동립도적함탄물질기광상미관결구,인위재로항내<6.3 mm적과립유2충괴매렬해성초후적분화현상소인기,차B매적분화시주요인소.
Through the different pyrolysis time tests in 200 kg coke oven of lump coal mainly used in melter gasifier, namely A coal and B coal, the size distribution and strength change of the two coals after coking are compared. Results show that the pulverization of B coal in coke oven was severe, whose size degradation rate (DR) always increases with the coking time prolonging. On the contrary, the DR of A coal decreases once reaching the maximum value. The mineral microstructures of semi coke formed by the two coal pyrolysis in coke oven are also compared. It is found that semi coke formed by A coal is mainly mosaic and isotropy structure, and the other semi coke formed by B coal is mainly fusain and isotropy structure. There is still some coal residue in both semi cokes. Through the mineral microstructure analysis of different particle size of carbon-containing materials in tuyere samples taken out from melter gasifier, it is discovered that the particles less than 6.3 mm in hearth are caused by the semi coke pulverization which is mainly from B coal.