GB/T 26930.6 - 2014 Focus on the determination of coal asphalt ash for primary aluminum production. The standard defines the scope of applicable coal asphalt, elaborates on sample collection and preparation, and specifies the required instruments and equipment, such as high temperature furnaces. Standardize the operation process of ash determination, including sample burning temperature and duration, etc., and also specify the form of result calculation and reporting. Coal asphalt ash affects the production mass of primary aluminum. This standard provides a unified measurement specification for the aluminum industry, helping enterprises to accurately control the mass of raw materials, ensure the stability and efficiency of primary aluminum production, and promote the process of industry standardization.