简介：ThearticledescribestheexperiencesofalternativematerialsforthemanufacturingoftherefractorymaterialsinthecompanyP-DRefractoriesCZa.s.Theattentionisfocusedonenergyby-products(EBP).Energyby-productsaregeneratedduringburninganddesulphurizationinthermalpowerplants.Classicalhigh-temperatureflyash(classFflyashaccordingtoASTMC618)isthemostimportantandflyashfromfluidizedtechnology(classCflyash)isthesecondgroup.IntheCzechRepublic,powerplantsproduceabout14milliontonsofenergyby-productseveryyear.Utilizationoftheseproductsinceramictechnologymeansareductionofrawmaterialcostsandalsoithelpstoreduceadverseenvironmentalimpact.ClassFflyash(FFA)andcinderfromhightemperaturecombustion(CD)wereusedinlightweightinsulationfireclaybricks.Wecanusethesematerialsasagrogandalighteningagentformaterialswithbulkdensityover900kg·m-3andclassificationtemperatureupto1150℃.ClassCflyash(CFA)isbeingtestedinawiderangeoftherefractorymaterials.Forexample,itcanbeusedinlightweightfireclaybricks,fireclaybricksforstoves,acid-resistantfireclaybricksorrefractorycastables.Therangeofpotentialproducts,whereEBPcouldbeused,isverywideandenergyby-productshavebecomeanimportantrawmaterialsource.

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简介：Anionomer类型水运的聚氨酯分散(手)被获得从poly(丙烯乙二醇)(PPG)，isophoronediisocyanate(IPDI)和通过修改prepolymerisocyanate的dimethylolpropionic酸(DMPA)处理。聚氨酯的二个系列被准备(组A和B)并且一个新预言模型基于灰关系分析被介绍在几个性质上预言原料的影响顺序例如固体内容，粘性，酸数字和聚氨酯的电解稳定性。模型罐头成功地通过设计示范实验在性质上预言原料的影响，这被发现。而且，预言模型的结果证明DMPA在粘性，部分酸价值和电解稳定性起一个关键作用。

简介：夜晚拍摄不比白天,特别是人像拍摄需要照明做辅助光,才能得到明亮清晰的照片,一般使用闪光灯补光为主。由于灯距、功率或拍摄时曝光控制的影响,会造成夜景人像明显光照过度,使照片效果不好,失去了夜景人像的味道。