GBT19494.2-2004 煤炭机械化采样 第2部分煤样的制备.pdf

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1、ICS73.040D21中华人民共和国国家标准GB/T19494.2-2004煤炭机械化采样第2部分:煤样的制备Mechanicalsamplingofcoal-Part2:Methodforsamplepreparation(ISO13909-1:2001Hardcoalandcoke-Mechanicalsampling-Part1:Generalintroduction,ISO13909-4:2001Hardcoalandcoke-Mechanicalsampling-Part4:Coal-Preparationoftestsamples,NEQ)2004-04-30发布2004

2、-10-01实施w.".中华人民共和国国家质量监督检验检疫总局发布勺口中国国家标准化管理委员会GB/T19494.2-2004目次前言‘························，····························，······················································⋯⋯皿1范围····················，·，····‘················，，·，··························································一12规范性引用

3、文件·，···，，，，甲甲-。。‘·········，，，，，，，，·““·······，·······。“···⋯⋯，一，，，，.，13术语和定义··········，······································，·····················。·。。·····。·‘··················⋯⋯14试样制备精密度·································································.....··········..............⋯⋯25试样的构成·······

4、······························································································.⋯⋯26缩分························································‘···················································⋯⋯37破碎·······················，·，···························，，··························

5、·····‘·····················⋯⋯138混合·····················，·-······“‘··················-·············································⋯⋯149空气干燥···············，·························································，，······························⋯⋯141。各种煤样的制备········，······························

6、···································.·.............⋯⋯1411存查煤样·····································································································⋯⋯1812制样设备的设计················································。········............····................⋯⋯19GB/T19494.2-2004目i青GB/T19494(

7、煤炭机械化采样》分为三个部分:—第1部分:采样方法;—第2部分:煤样的制备;—第3部分:精密度测定和偏倚试验。本部分为GB/T19494的第2部分，对应于ISO13909-1:2001《硬煤和焦炭机械化采样第1部分:绪言》和ISO13909-4:2001(硬煤和焦炭机械化采样第4部分:煤试样制备》。本部分与前述两标准的一致性程度为非等效，主要差异如下:—按中国人的思维逻辑，对标准的结构层次做了修改;—对ISO23909-1和ISO13909一中