GB/T 16479-2008 English PDF (GBT16479-2008)

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GB/T 16479-2008: Light rare earth carbonate
GB/T 16479-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.99
H 65
Replacing GB/T 16479-1996
Light rare earth carbonate
碳酸轻稀土
ISSUED ON. MARCH 31, 2008
IMPLEMENTED ON. SEPTEMBER 01, 2008
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3 
1 Scope ... 4 
2 Normative references ... 4 
3 Requirements ... 4 
4 Test methods ... 5 
5 Inspection rules ... 5 
6 Marking, packaging, transportation, storage ... 6 
Foreword
This standard is a revision of GB/T 16479-1996 “Rare earth carbonate”. As
compared with GB/T 16479-1996, the main changes of this standard are as
follows.
- CHANGE the standard name to “Light rare earth carbonate”;
- According to the requirements of GB/T 17803-1999 “Designation system
for rare earth products”, USE digital designation;
- CANCEL the designation of the original RE2(CO3)3 • XH2O-H1, ADD the
product designation of 193244C;
- ADD the evaluation index of praseodymium oxide content and non-rare
earth impurities alumina, zinc oxide; CANCEL the evaluation index of
sodium oxide;
- CHANGE the evaluation of calcium oxide and magnesium oxide from the
resultant assessment to the component assessment;
- MAKE appropriate adjustments to the content of rare earth elements of
each designation as well as the content of other non-rare earth impurities.
This standard was proposed by the Rare Earth Office of the National
Development and Reform Commission.
This standard shall be under the jurisdiction of the National Rare Earth
Standardization Technical Committee.
Responsible drafting organization of this standard. Inner Mongolia Baotou Steel
Rare Earth High-Tech Co., Ltd.
Participated drafting organizations of this standard. Guangdong Zhujiang Rare
Earth Co., Ltd., Yixing Xinwei Licheng Co., Ltd.
The main drafters of this standard. Li Dong, Wang Jing, Liu Hengchang, Guo
Meiqin, Jin Yanhua, Yu Zhichun.
This standard replaces the standard previously issued as follows.
- GB/T 16479-1996.
Light rare earth carbonate
1 Scope
This standard specifies the requirements, test methods, inspection rules,
packaging, marking, transportation and storage of light rare earth carbonate.
This standard is applicable to light rare earth carbonates prepared by chemical
methods using the light-rare-earth-based rare earth minerals as raw materials.
It is mainly used as a raw material for separating a single rare earth product,
preparing a rare earth polishing powder, or as a raw material for producing
mixed rare earth oxide for electrolysis purposes.
2 Normative references
The provisions in following documents become the provisions of this standard
through reference in this standard. For the dated references, the subsequent
amendments (excluding corrections) or revisions do not apply to this standard;
however, parties who reach an agreement based on this standard are
encouraged to study if the latest versions of these documents are applicable.
For undated references, the latest edition of the referenced document applies.
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 12690 (all parts) Chemical analysis methods of non-rare earth
impurities in rare earth metals and the oxides
GB/T 16484 (all parts) Chemical analysis methods of rare earth chloride and
light rare earth carbonate
3 Requirements
3.1 Chemical composition
Product designation and chemical composition shall meet the requirements of
Table 1. If the purchaser has special requirements, the supplier and the
purchaser may negotiate separately.