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......
全自动工业分析仪采用标准:国标GB/T212-2008《煤的工业分析方法》。 全自动工业分析仪的功能特点: 1、内置进口万分之一电子天平,采用热重分析法,快速、自动、连续地进行19个试样的试验,每20min左右出一个样品的空干基水分、灰分、挥发分的分析结果,并自动计算出该样品的发热量、固定碳、氢含量。速度快、在线程度高,可用于指导生产。...
全自动工业分析仪采用标准:国标GB/T212-2008《煤的工业分析方法》。 全自动工业分析仪的功能特点: 1、内置进口万分之一电子天平,采用热重分析法,快速、自动、连续地进行19个试样的试验,每20min左右出一个样品的空干基水分、灰分、挥发分的分析结果,并自动计算出该样品的发热量、固定碳、氢含量。速度快、在线程度高,可用于指导生产。...
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。...
全自动工业分析仪采用标准:国标GB/T212-2008《煤的工业分析方法》。 全自动工业分析仪的功能特点: 1、内置进口万分之一电子天平,采用热重分析法,快速、自动、连续地进行19个试样的试验,每20min左右出一个样品的空干基水分、灰分、挥发分的分析结果,并自动计算出该样品的发热量、固定碳、氢含量。速度快、在线程度高,可用于指导生产。...
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