MTT 925-2004 工业型煤落下强度测定方法

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1、准标网www.zhunbiao.com免费下载ICS75.160.01D21备案号:15475-2005MT中华人民共和国煤炭行业标准MT/T925-2004工业型煤落下强度测定方法Dropshattertestofindustrialbriquette2004-12-14发布2005-06-01实施国家发展和改革委员会发布准标网www.zhunbiao.com免费下载MT/T925-2004目次前言················································。··。······················，·

2、···························一Q1范围································，········，···························，·····································，·一12规范性引用文件··········，················································，·······························⋯⋯13方法提要··················，·········

3、····，······。··································，··························⋯⋯14仪器设备··············，·································。···························。······，············⋯⋯15型煤试样的采取和制备·························································】··············⋯⋯“·⋯‘·⋯26测定步骤·

4、····································································································⋯⋯27结果计算····················。··················································································一28方法精密度···························································

5、，·····。····························⋯⋯2准标网www.zhunbiao.com免费下载MT/T925-2004前言本标准参照GB/T15459-1995《煤的抗碎强度测定方法》而制定。对不适用于型煤的条款作了改变。改变的主要内容如下:—对标准适用的型煤粒度范围做了规定;—采用试验后粒度大于13mm的型煤块质量计算落下强度。本标准由中国煤炭工业协会科技发展部提出。本标准由全国煤炭标准化技术委员会归口。本标准起草单位:煤炭科学研究总院煤炭分析实验室。本标准主要起草人:李宏图、姚恩题、韩锦德。本标准为首次制定。准标网ww

6、w.zhunbiao.com免费下载MT/T925-2004工业型煤落下强度测定方法1范围本标准规定了工业型煤落下强度测定用的仪器设备、型煤试样、测定步骤、结果表达和方法精密度。本标准适用于各种工业型煤。2规范性引用文件下列文件中的条款通过本标准的引用而成为本标准的条款。凡是注日期的引用文件，其随后所有的修改单(不包括勘误的内容)或修订版均不适用于本标准，然而，鼓励根据本标准达成协议的各方研究是否可使用这些文件的最新版本。凡是不注日期的引用文件，其最新版本适用于本标准MT/T915工业型煤样品采取方法MT/T916工业型煤样品制备方法3方法提要一定量

7、的型煤样品，从2m高处自由落下到规定厚度的钢板上。将落下的型煤中粒度大于13mm的型煤块再次落下，共落下3次，以第3次落下后粒度大于13mm的型煤块质量占原型煤试样质量的百分数，表示型煤的落下强度。4仪器设备4.1天平:感量1g,4.2圆孔筛:孔径13mm,4.3试验架:如图1所示。钢板厚度不小于15mm，长约1200mm,宽约900mm。四周挡板高约200mm。最好有一边活动，以便于清扫。标记杆可调。1—标记杆;2—挡板;3—钢板。图1试验架示意图准标网www.zhunbiao.com免费下载MT/T925-20045型煤试样的采取和制备按照MT/

8、T915的规定采取型煤样品，再按照MT/T916的规定用长带法缩分出6kg型煤样品，其中外形基本完整、无裂纹