YS/T 231-2015 in English

1 Scope

This standard specifies the requirements, test methods, inspection rules and marking, packaging, transport, storage as well as quality certificate and order (or contract) content of tungsten concentrate.

This standard is applicable to tungsten concentrate products obtained through mineral processing, which are used for the production of ammonium paratungstate, tungstic acid, ammonium metatungstate, tungsten oxide, etc.

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 1480 Metallic Powders - Determination of Particle Size by Dry Sieving
GB/T 4414 Methods of Sampling and Sample Preparation of Tungsten Concentrates in Bags
GB/T 6150 (All Parts) Methods for Chemical Analysis of Tungsten Concentrates
GB/T 26019 Methods for Chemical Analysis of High Impurity Tungsten Mineral - Determination of Tungsten Trioxide Content - Twice Separation and Igniting Gravimetric Method

3 Requirements

Foreword i
1 Scope
2 Normative References
3 Requirements
4 Test Methods
5 Inspection Rules
6 Marking, Packaging, Transport, Storage and Quality Certificate
7 Order (or Contract) Content