GB/T 20169-2015Mixed rare earth oxide of ion-absorpted type rare earth ore (English PDF)
离子型稀土矿混合稀土氧化物
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 11, 2015
Implementation date
April 1, 2016
Scope
GB/T 20169-2015 is the English-translated version of 离子型稀土矿混合稀土氧化物.
GB/T 20169-2015 is the Chinese standard "Mixed rare earth oxide of ion-absorbed type rare earth ore". Its scope clause reads: This Standard specifies the requirements, test methods, inspection rules, and symbols, packaging, transport, storage and quality certificate for the mixed rare earth oxide of ion-absorbed type rare earth ore.
This Standard is applicable to the mixed rare earth oxide of ion-absorbed type rare earth ore prepared by using the chemical method, where ion-absorbed type rare earth ore is used as the raw material.
The mixed rare earth oxide of ion-absorbed type rare earth ore is mainly used as the raw material for grouping rare earth aggregates or separating single rare earth compounds.
Its clauses include requirements; test methods; inspection rules. It was issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on SEPTEMBER 11, 2015 and took effect on APRIL 1, 2016.
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Document preview — GB/T 20169-2015
National Standard of the People's Republic of China
- ICS
- 77.120.99
- Classification
- H 65
- Replacing
- GB/T 20169-2006
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- Foreword3
- 1 Scope5
- 2 Normative references5
- 3 Requirements6
- 4 Test methods7
- 5 Inspection rules7
- 6 Symbols, packaging, transport, storage and quality certificate9
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 20169-2006 Mixed rare earth oxide of ion-absorbed type rare earth ore.
Compared with GB/T 20169-2006, the major technical changes in this Standard are as follows.
- ADD the character grade (SEE Chapter 3);
- COMBINE eight grades into five grades (SEE Chapter 3);
- LIST the Y2O2 indicator in each grade individually (SEE Table 1);
- DELETE the indicator in each grade (SEE Table 1 in 2006 edition);
- MODIFY the indicator in each grade to (Pr6O11 + Nd2O3) content indicator (SEE Table 1);
- MODIFY the indicator in each grade to (Sm2O3 + Gd2O3) content indicator (SEE Table 1);
- MODIFY the Al2O3 content in non-rare earth impurities from 1.2% to 1.5% (SEE Table 1);
- ADD the assessment indicator of each grade for non-rare earth impurity SiO2 (SEE Table 1); and - ADD the assessment indicator of each grade for loss on ignition (SEE Table 1).
1 Scope
This Standard specifies the requirements, test methods, inspection rules, and symbols, packaging, transport, storage and quality certificate for the mixed rare earth oxide of ion-absorbed type rare earth ore.
This Standard is applicable to the mixed rare earth oxide of ion-absorbed type rare earth ore prepared by using the chemical method, where ion-absorbed type rare earth ore is used as the raw material. The mixed rare earth oxide of ion-absorbed type rare earth ore is mainly used as the raw material for grouping rare earth aggregates or separating single rare earth compounds.
2 Normative references
The following documents are essential to the application of this document. For dated references, only the editions with the dates indicated are applicable to this document. For undated references, only the latest editions (including all the amendments) are applicable to this document.
GB/T 8170 Rules of rounding off for numerical values & expression and judgement 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 12690.3 Chemical analysis methods for non-RE impurity of rare earth metals and their oxides - Determination of water content of rare earth oxides - Gravimetric method
GB/T 14635 Rare earth metals and their compounds - Determination of total rare earth contents
3 Requirements
3.1 Product classification
The mixed rare earth oxide of ion-absorbed type rare earth ore is divided into 5 grades according to its chemical compositions. The designation system shall comply with the provisions of GB/T 17803.
3.2 Chemical compositions
The chemical compositions of the product shall comply with the provisions of Table 1. For the Demander's special requirements for the product, it is advisable to be determined in consultation by the Supplier and the Demander.
4 Test methods
4.1 Chemical compositions
4.1.1 The method for analyzing the total amount of rare earth shall be in accordance with the provisions of GB/T 14635.
4.1.5 The method for analyzing the sulfate radical (SO42-) shall be in accordance with the provisions of GB/T 16484.12. The silicon dioxide (SiO2) shall be analyzed in accordance with the method negotiated by the Supplier and the Demander.
4.1.6 The method for analyzing the content of rare earth oxide components shall be in accordance with the provisions of GB/T 18882.1.
4.2 Rounding off for numerical values
PERFORM in accordance with the provisions of GB/T 8170.
4.3 Appearance quality
Visual inspection.
5 Inspection rules
5.1 Check and acceptance
5.1.1 Check
The products shall be inspected by the Supplier's Quality Inspection Department, so as to ensure that the product quality is in line with the provisions of this Standard. In addition, FILL in the quality certificate.
5.1.2 Acceptance
The Demander shall inspect the received products in accordance with the provisions of this Standard.
5.2 Lot grouping
Products shall be submitted in batches for inspection. Each batch shall consist of the same grade of products.
5.3 Inspection items
Each batch of products shall be inspected for chemical compositions and appearance.
5.4 Sampling and sample preparation
The number of arbitration samples shall be in accordance with the provisions of Table 2. The sample volume for each piece (bag) shall not be less than 50g.
MIX evenly. Rapidly DIVIDE the samples into the amount required by quartering.
Immediately INSERT the samples into a clean and dry sample bag (bottle). SEAL the bag (bottle) afterwards.
5.5 Determination of the inspection results
6 Symbols, packaging, transport, storage and quality certificate
6.1 Symbols
The outside of each piece (bag) shall be indicated with.
6.2 Packaging
A plastic bag shall be used as the inner packaging of the product. SEAL the bag afterwards. A woven bag shall be used as the outer packaging of the product. SEAL the bag afterwards.
6.4 Quality certificate
Each batch of products shall be accompanied by a quality certificate, indicated with. […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
Referenced standards
Normative references
- GB/T 8170Rules of rounding off for numerical values & expression and judgement of limiting values
- GB/T 12690.2Chemical analysis methods for non-rare earth impurities in rare earth metals and their oxides - Part 2: Determination of the loss on ignition of rare earth oxides - Gravimetric method
- GB/T 12690.3Chemical analysis methods for non-rare earth impurities in rare earth metals and their oxides - Part 3: Determination of the water content of rare earth oxides - Gravimetric method
- GB/T 14635Rare earth metals and their compounds - Determination of total rare earth content
Similar standards
Editions of GB/T 20169
| Edition | Title | Revision | Status |
|---|---|---|---|
| GB/T 20169-2015 | Mixed rare earth oxide of ion-absorpted type rare earth ore | current edition | Current |
| GB/T 20169-2006 | Mixed rare earth oxide of ion-absorpted type rare earth ore | previous edition | Superseded |
This page sells the current edition, GB/T 20169-2015. Earlier editions are listed for reference only.
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Related Standards
GB/T 12690.2-2015 — Chemical analysis methods for non-rare earth impurities in rare earth metals and their oxides - Part 2: Determination of the loss on ignition of rare earth oxides - Gravimetric method
GB/T 12690.20-2024 — Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides - Part 20: Determination of minor amounts of fluorine and chlorine in rare earth oxides - Ion chromatography method
GB/T 12690.21-2024 — Chemical analysis methods for non-rare earth impurities of rare earth metals and their oxides - Part 21: Determination of sulfate radical content in rare earth oxides - Barium sulfate turbidimetry
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