简介:摘要:本文选取有代表性的两种高灰熔融温度煤样,通过向煤中分别添加不同质量比例的CaO和MgO试剂,分析添加钙镁助熔剂后煤灰熔融温度的变化规律。得到结论:A煤添加4%钙镁复配助熔剂后,随着钙镁比的增大煤灰熔融温度总体呈下降趋势,当WCaO:WMgO=10:0时,煤灰流动温度降至最低为1375℃。B煤添加6%钙镁复配助熔剂后,随着钙镁比的增大煤灰熔融温度均先降低后升高的趋势,呈“V”型;当WCaO:WMgO=5:5时,煤灰流动温度降至最低为1297℃。
简介:Darkhumour:makingjokesaboutthingsthatareusuallyconsideredtobeseriousorsad.Expertssaythatlaughingisanabilitythatisspecifictohumanbeings.Nootheranimaldoesit.Sowhydowe?ThePurposeofLaughter笑的目的Formostpeople,laughingisawayofshowingwearehappyorrelieved[宽慰的]—weusuallylaughwithotherpeoplepresent[在场的]andithelpsrelaxtheatmosphere.Anotherreasonforlaughteristhatithelpsusdealwiththesensitiveareaofsocialmorality[道德观],orsituationswhicharenormallyserious,likedeath,diseaseorwar.Thisiswherehumoursometimesgets'dark.'