XB/T 211-2015 Concentrate of samarium, europium, and gadolinium oxide
1 Scope
This standard specifies the requirements, test methods, inspection rules, marking, packaging, transportation and storage, as well as quality certificate for concentrate of samarium, europium, and gadolinium oxide.
This standard is applicable to concentrate of samarium, europium, and gadolinium oxide produced by extraction separation. This product is primarily used as a raw material for extracting individual rare earth elements such as samarium, europium, gadolinium, terbium, and dysprosium for further processing.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 8170 Rules of rounding off for numerical values & expression and judgment of limiting values
GB/T 12690.2 Chemical analysis methods for non-RE impurity of rare earth metals and their oxides - Determination of ignition loss content of rare earth oxides - Gravimetric method
GB/T 23594.1 Chemical analysis methods of rare earth contents in samarium-europium-gadolinium concentrates - Part 1: Determination of total rare earth oxide content - Gravimetry
GB/T 23594.2 Chemical analysis methods of rare earth contents in samarium-europium-gadolinium concentrates - Part 2: Determination of fifteen rare earth oxide relative contents - Inductively coupled plasma emission spectrometry
3 Requirements
3.1 Chemical composition
3.1.1 The chemical composition of solid concentrate of samarium, europium, and gadolinium oxide shall meet those specified in Table 1. For certain concentrate of samarium, europium, and gadolinium oxide, it shall be separately agreed by the supplier and the purchaser.
Contents
Foreword I
1 Scope
2 Normative references
3 Requirements
4 Test methods
5 Inspection rules
6 Marking, packaging, transportation and storage
