5.1 Moisture, as determined by this instrumental test method, is used for calculating other analytical results to a dry basis using procedures in Practice D3180.
5.2 Moisture can be used in conjunction with the air-dry moisture loss determined by Test Method D3302 to determine total moisture in coal. Total moisture is used for calculating other analytical results to an as-received basis using Practice D3180.
5.3 Ash yield is the residue remaining after heating the coal and coke samples (see Note 1).
Note 1: The ash obtained differs in composition and amount from the mineral constituents present in the original coal. Combustion causes an expulsion of all water, the loss of carbon dioxide from carbonates, the conversion of iron pyrite into iron oxides and sulfur oxides, and other chemical reactions. Ash yield, as determined by this test method, can differ from the amount of ash produced in furnace operations or other combustion systems because combustion conditions influence the chemistry and amount of ash.
5.4 Ash yield is used, (1) as a parameter for evaluating sampling procedures and coal cleaning processes, (2) in the ultimate analysis calculation of oxygen by difference using Practice D3176, (3) in calculations including material balance, reactivity and yields of products relevant to coal conversion processes such as gasification and liquefaction, (4) in calculations to estimate the loading on electrostatic precipitators and on the fly ash and bottom ash disposal systems as well as erosion rates on boiler systems.
5.5 Volatile matter yield, when determined as herein described, may be used to (1) indicate coke yield on carbonization, (2) provide the basis for purchasing and selling, or (3) establish combustion characteristics.
5.6 Fixed carbon is a calculated value. It is the difference between 100 and the sum of the percent moisture, ash, and volatile matter. All percents shall be on the same mo......
3、自动化程度高:采用计算机实时通讯技术和自适应控制技术,将电子天平集成到仪器内部,结合自动称量机构,采用热重分析法,自动称样、自动送样、自动处理数据、结果计算、报表打印和存储等,实现无人值守。4、操作简便:试验过程中无需取放坩埚盖、送样和取样,同时利用国外气缸自动控制水、灰部分上盖的开关,避免高温辐射和烫伤的危险。...
本文针对生产中用的煤、焦炭以及冶金材料分析中存在的方法不便和不足问题,探讨高频红外碳硫吸收法测定这类材料中的碳和硫的方法,实现了快速分析,且结果可与经典的国家标准化学分析法相比。 ...
Standard Test Method for Thermal Stability by Thermogravimetry ASTM E1641-2007 用热重分析法的分解动力学用标准试验方法 Standard Test Method for Decomposition Kinetics by Thermogravimetry ASTM E2043-1999(2006) 热重分析法测量农业辅助剂溶液中不挥发物质的标准试验方法...
因此,太原市一直在不断尝试各种办法,比如燃煤置换措施,而焦炭的民用就成为其中一个方向。”太原市环保局局长陈继光说。 2015年8月,太原市环境监测中心站对民用洁净焦炭和城中村普遍使用的民用煤的燃烧排放情况进行了比对监测。在监测的同时,还邀请了锅炉、热工、煤质分析、环保等方面的专家,对民用洁净焦炭的燃烧情况进行评估。 ...
Copyright ©2007-2022 ANTPEDIA, All Rights Reserved
京ICP备07018254号 京公网安备1101085018 电信与信息服务业务经营许可证:京ICP证110310号