1.1 这些试验方法包括在规定的焦化处理后测定含碳砖和形状中的残余碳含量。它们提供了两种程序。第一个步骤是基于碳的燃烧及其作为二氧化碳的测量。然而，当对含有碳化硅或其他碳化物的制品使用第一步骤时，将不区分以碳化物形式存在的碳和以元素碳形式存在的炭。第二个步骤提供了一种计算表观残余碳（基于点燃焦化样品后的重量损失）、表观含碳材料含量和表观碳产率的方法。如果第二个步骤用于含有金属添加剂或碳化物的砖或形状，则必须认识到，金属或碳化物的氧化或两者都会导致重量增加。这样的体重增加会极大地改变结果，在解释数据时必须牢记这一点。 1.2 以英寸磅为单位的数值应视为标准。括号中给出的值仅供参考。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 3.1 这些测试方法设计用于含碳产品。焦化含碳砖或形状的残余碳含量指示了在使用中有多少碳可用于抵抗炉渣侵蚀或氧化损失。 表观碳产率给出了作为残余碳保留的总含碳物质的相对效率的估计。 3.2 残余碳直接影响沥青或含树脂耐火材料的几个性能，如点燃的孔隙率、密度、强度和热导率。 3.3 这些测试方法适用于产品开发、制造控制和规范验收。 3.4 这些试验方法对试样尺寸、焦化速率等非常敏感。；因此，严格遵守这些测试方法至关重要。 3.5 可还原成分的可识别量，如Fe 2. O 3. ，将对结果产生显著影响。因此，当测试从服务中移除的砖时，通过这些测试方法获得的值将不同。在绝对意义上尝试使用这些测试方法时，必须牢记这一点。 3.6 金属和碳化物等可氧化成分会对结果产生显著影响。 在使用第二个程序时必须牢记这一点，该程序基于点燃焦化试样后的重量损失测量。 3.7 含有镁金属的砖或形状的测试存在特殊问题，因为这种金属具有高度挥发性，并且在焦化过程中可能从样品中损失大量的镁。在解释含镁砖的测试结果时，必须牢记这一点。此外，镁可以很容易地与大气湿度反应。在储存含有镁的砖块时，必须牢记这一点。

1.1 These test methods cover the determination of residual carbon content in carbon-bearing brick and shapes after a prescribed coking treatment. They provide two procedures. The first procedure is based on the combustion of carbon and its measurement as carbon dioxide. However, when using the first procedure for articles that contain silicon carbide or other carbides, no distinction will be made between carbon present in the form of a carbide and carbon present as elemental carbon. The second procedure provides a method for calculating apparent residual carbon (on the basis of weight loss after igniting the coked specimens), apparent carbonaceous material content, and apparent carbon yield. If the second procedure is used for brick or shapes that contain metallic additives or carbides, it must be recognized that there will be a weight gain associated with the oxidation of the metals, or carbides, or both. Such a weight gain can change the results substantially, and this must be kept in mind when interpreting the data. 1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 3.1 These test methods are designed for use with carbon-containing products. The residual carbon content of a coked carbon-containing brick or shape is an indication of how much carbon may be available, in service, to resist slag attack on, or oxidation loss of, that body. Apparent carbon yield gives an estimate of the relative efficiency of the total carbonaceous matter to be retained as residual carbon. 3.2 Residual carbon has a direct bearing on several properties of a pitch or resin-containing refractory, such as ignited porosity, density, strength, and thermal conductivity. 3.3 These test methods are suitable for product development, manufacturing control, and specification acceptance. 3.4 These test methods are very sensitive to specimen size, coking rates, etc.; therefore, strict compliance with these test methods is critical. 3.5 Appreciable amounts of reducible components, such as Fe 2 O 3 , will have a noticeable effect on the results. Thus, values obtained by these test methods will be different when brick removed from service is tested. This must be kept in mind when attempting to use these test methods in an absolute sense. 3.6 Oxidizable components such as metals and carbides can have a noticeable effect on the results. This must be kept in mind when using the second procedure, which is based on measuring weight loss after igniting the coked specimens. 3.7 Testing of brick or shapes that contain magnesium metal presents special problems since this metal is highly volatile and substantial amounts of the magnesium can be lost from the sample during the coking procedure. This must be kept in mind when interpreting the results of testing of brick that contains magnesium. In addition, magnesium can react readily with atmospheric humidity. This must be kept in mind when storing brick that contains magnesium.