GB/T 6730.2-1986 introduces the weight method for determining the moisture content of iron ore. A certain amount of iron ore samples are dried in a specified temperature environment, and the moisture content is calculated by measuring the weight change of the samples before and after drying. The standard strictly regulates the collection and preparation process of the samples to ensure that the samples are representative. Detail the drying temperature, time and other conditions, as well as the accuracy requirements and operation specifications of the weighing instrument. Through rigorous steps to ensure the accuracy of measurement results, provide key data for iron ore mass evaluation, and are widely used in iron ore mining, processing and trade.