GB/T 16479-2020 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 16479-2020 | English | 105 |
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Light rare earth carbonate
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| GB/T 16479-2008 | English | 90 |
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Light rare earth carbonate
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| GB/T 16479-1996 | English | 199 |
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Rare earth carbonate
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GB/T 16479-2020: Light rare earth carbonate---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT16479-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.99
H 65
Replacing GB/T 16479-2008
Light rare earth carbonate
Issued on. NOVEMBER 19, 2020
Implemented on. OCTOBER 01, 2021
Issued by. State Administration for Market Regulation;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Technical requirements... 5
4 Test methods... 7
5 Inspection rules... 7
6 Marks, packaging, transport, storage and quality certificate... 8
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 16479-2008 “Light rare earth carbonate”.
Compared with GB/T 16479-2008, in addition to editorial modifications, the
main technical changes are as follows.
- modified text description of the scope (see Clause 1 of this Edition);
- modified normative references (see Clause 2 of this Edition);
- added product classification (see 3.1 of this Edition);
- added character designations (see 3.1, 3.2 of this Edition);
- added content requirements for lanthanum oxide (La2O3) in all product
designations (see 3.2 of this Edition);
- added radioactivity requirements for product designations (LaCe)x(CO3)y-
65Ce, (LaCePr)x(CO3)y-58Ce (see 3.2 of this Edition);
- added content requirements for praseodymium oxide (Pr6O11), neodymium
oxide (Nd2O3), manganese oxide (MnO2), sodium oxide (Na2O), and lead
oxide (PbO) of product designation (LaCe)x(CO3)y-65Ce (see 3.2 of this
Edition);
- modified some content requirements for product designation
(LaCe)x(CO3)y-65Ce; modified the total rare earth (REO) content from not
less than 44% to not less than 45%, cerium oxide (CeO2) content from not
less than 62% to 62%~68%, sulfate (SO42-) content from not more than
0.05% to not more than 0.03%, chloride (Cl-) content from not more than
0.2% to not more than 0.15%, calcium oxide (CaO) content from not more
than 0.5% to not more than 0.05%, magnesium oxide (MgO) content from
not more than 0.1% to not more than 0.01% (see 3.2 of this Edition, 3.1 of
Edition 2008);
- added content requirements for neodymium oxide (Nd2O3), sodium oxide
(Na2O) and lead oxide (PbO) of product designation (LaCePr)x(CO3)y-58Ce
(see 3.2 of this Edition);
- modified some content requirements for product designation
(LaCePr)x(CO3)y-58Ce; modified the total rare earth (REO) content from not
less than 44% to not less than 45%, praseodymium oxide (Pr6O11) content
from not less than 4% to 4%~7%, content of other rare earth impurities from
the margin to not more than 0.3%, calcium oxide (CaO) content from not
more than 0.5% to not more than 0.2%, alumina (Al2O3) content from not
more than 0.05% to not more than 0.015% (see 3.2 of this Edition, 3.1 of
Edition 2008);
- deleted content requirements for magnesium oxide (MgO) of product
designation (LaCePr)x(CO3)y-58Ce (see 3.1 of Edition 2008);
- modified some content requirements for product designation
(LaCePrNdEu)x(CO3)y-0.2Eu; modified cerium oxide (CeO2) content from
not less than 48% to 48%~52%, praseodymium oxide (Pr6O11) content from
not less than 5% to 4%~6%, neodymium oxide (Nd2O3) content from not
less than 15% to not less than 14.2%, Europium oxide (Eu2O3) content from
0.18% to not more than 0.175%, alumina (Al2O3) content from not more
than 0.07% to not more than 0.06% (see 3.2 of this Edition, 3.1 of Edition
2008);
- added fluorine (F-) content requirements for product designation
(LaCePrNdEu)x(CO3)y-0.2Eu (see 3.2 of this Edition);
- deleted technical indicators of product designation 193244C (see 3.1 of
Edition 2008);
- modified description of appearance quality (see 3.3 of this Edition, 3.2 of
Edition 2008);
- added determination requirements for appearance quality inspection
results (see 5.5.2 of this Edition).
This Standard was proposed by and shall be under the jurisdiction of National
Technical Committee on Rare Earth of Standardization Administration of China
(SAC/TC 229).
The drafting organizations of this Standard. China North Rare Earth (Group)
High-Tech Co., Ltd., Yiyang Hongyuan Rare Earth Co., Ltd., Baotou Rare Earth
Research Institute, Baotou Huamei Rare Earth Tech Co., Ltd.
Main drafters of this Standard. Liu Jianjun, Li Peizhong, Gu Yuchen, Sun
Guangjie, Gao Huicong, Xie Ping, Xu Tao, Chen Yuehua, Guo Yu.
Versions of standard substituted by this Standard are.
- GB/T 16479-1996, GB/T 16479-2008.
Light rare earth carbonate
1 Scope
This Standard specifies technical requirements, test methods, inspection rules,
marks, packaging, transport, storage and quality certificates for light rare earth
carbonate.
This Standard is applicable to light rare earth carbonate prepared by chemical
method with bastnaesite-monazite mixed concentrate as raw material. It is
mainly used to separate single rare earths, prepare rare earth polishing
materials, catalytic materials, and mixed rare earth metals.
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
judgement of limiting values
GB/T 12690 (all parts), Chemical analysis methods of non-rare earth
impurities in rare earth metals and the oxides
3 Technical requirements
3.1 Product classification
The products are divided into three designations. (LaCe)x(CO3)y-65Ce,
(LaCePr)x(CO3)y-58Ce, (LaCePrNdEu)x(CO3)y-0.2Eu, according to chemical
composition.
3.2 Chemical composition
The chemical composition of the product shall meet the requirements of Table
1.If the purchaser has special requirements for the product, the supplier and
the purchaser may negotiate separately.
3.3 Appearance quality
3.3.1 The product is in the form of powders.
4 Test methods
4.1 Chemical composition
4.2 Numerical rounding
Numerical rounding is carried out in accordance with the provisions of GB/T
8170.
4.3 Appearance quality
Under natural scattered light, conduct visual inspection.
5 Inspection rules
5.1 Inspection and acceptance
5.1.1 The product is inspected by the supplier’s technical supervision
department to ensure that the quality of the product meets the requirements of
this standard and fill in the quality certificate.
5.1.2 The purchaser shall inspect the products received. If the inspection result
5.2 Batching
Products shall be submitted for inspection in batches. Each batch shall be
composed of products of the same designation.
5.3 Inspection items
Each batch of products shall be inspected for chemical composition and
appearance quality.
5.4 Sampling and sample preparation
5.5 Determination of inspection results
5.5.1 When the arbitration analysis result of chemical composition does not
conform to the provisions of this Standard, then take double samples from the
batch of products to repeat the inspection on the nonconforming items. If there
are still nonconforming items, the batch of products shall be rejected.
5.5.2 When the results of the appearance inspection do not conform to the
provisions of this Standard, the batch of products shall be directly rejected.
6 Marks, packaging, transport, storage and quality certificate
6.1 Marks
The outside of each barrel (box, bag) shall indicate.
6.2 Packaging
Products are packed in double-layer plastic bags. Put into a plastic woven bag
after being sealed by hot pressing or rope tie.
6.3 Transport and storage
Strictly prevent rain and moisture absorption during product transportation.
Store in a dry place. Stacking in open air is not allowed.
6.4 Quality certificate
Each batch of products shall be accompanied by a quality certificate, indicating.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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