1.1 本试验方法包括热重法（TGA）测定铝还原工业中使用的成型碳阳极和阴极块的空气反应性和除尘。仪器选择涵盖各种类型，具有各种热条件、样本容量、结构材料以及确定质量损失和后续反应速率的程序。该试验方法标准化了样品形状、反应温度、暴露表面上的气体速度和反应时间等变量，从而使在不同仪器上获得的结果具有相关性。 1.2 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 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）。本标准的用户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（TBT）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》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 空气反应率用于量化碳伪影与空气反应的趋势。这种不必要的副反应所消耗的碳不适用于将氧化铝还原为初级金属的初级反应。一些公司使用空气反应性除尘率来量化碳制品的焦炭骨料或结合剂焦炭与这些气体选择性反应的趋势。这些气体对粘结焦炭或碳制品的焦炭集料的优先侵蚀会导致一些碳脱落或 灰尘 ，使碳无法用于还原氧化铝的初级反应，更重要的是，降低了铝还原池的效率。 5.2 空气反应性和除尘率的比较有助于选择用于铝还原行业特定冶炼技术的商业阳极制造原材料。 5.3 空气反应率用于评估有效性和选矿过程或用于研究目的。

1.1 This test method covers the thermogravimetric (TGA) determination of air reactivity and dusting of shaped carbon anodes and cathode blocks used in the aluminum reduction industry. The apparatus selection covers a significant variety of types with various thermal conditions, sample size capability, materials of construction, and procedures for determining the mass loss and subsequent rate of reaction. This test method standardizes the variables of sample shape, reaction temperature, gas velocity over the exposed surfaces, and reaction time such that results obtained on different apparatuses are correlatable. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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 ====== 5.1 The air reactivity rates are used to quantify the tendency of a carbon artifact to react with air. Carbon consumed by this unwanted side reaction is unavailable for the primary reactions of reducing alumina to the primary metal. Air reactivity dusting rate is used by some companies to quantify the tendency of the coke aggregate or binder coke of a carbon artifact to selectively react with these gases. Preferential attack of the binder coke or coke aggregate of a carbon artifact by these gases causes some carbon to fall off or dust , making the carbon unavailable for the primary reaction of reducing alumina and, more importantly, reducing the efficiency of the aluminum reduction cell. 5.2 Comparison of air reactivity and dusting rates is useful in selecting raw materials for the manufacture of commercial anodes for specific smelting technologies in the aluminum reduction industry. 5.3 Air reactivity rates are used for evaluating effectiveness and beneficiation processes or for research purposes.