GB/T 10322.2-2000 in English

《GB/T 10322.2-2000铁矿石 评定品质波动的实验方法》由TC317（全国铁矿石与直接还原铁标准化技术委员会）归口，主管部门为中国钢铁工业协会。
本标准规定了评定各种类型铁矿石品质波动的实验方法，适用于铁矿石贸易和各种取制样装置。

Scope

This standard specifies the test methods for assessing quality fluctuations of various types of iron ores, and is applicable to iron ore trade and various sampling and preparation devices. This standard specifies two different methods. The first method is to take sub-samples according to the stratified sampling method or systematic sampling method described in GB/T 10322.1, and then alternately merge and analyze several pairs of sub-samples. The second method is to take and analyze individual incremental samples and then analyze the data using the method of variance. Less work is done with alternating duplicate samples, and the variable method can better estimate quality fluctuations and thus better estimate sampling bias. The variable method is more suitable for precise sampling operations. Note: This test method is generally also suitable for timed sampling if the flow rate is substantially uniform.