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GB/T 20169-2015 PDF in English


GB/T 20169-2015 (GB/T20169-2015, GBT 20169-2015, GBT20169-2015)
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GB/T 20169-2015: PDF in English (GBT 20169-2015)

GB/T 20169-2015
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.99
H 65
Replacing GB/T 20169-2006
Mixed rare earth oxide of ion-absorbed type rare earth ore
离子型稀土矿混合稀土氧化物
ISSUED ON. SEPTEMBER 11, 2015
IMPLEMENTED ON. APRIL 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
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Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Requirements ... 6 
4 Test methods ... 7 
5 Inspection rules ... 7 
6 Symbols, packaging, transport, storage and quality certificate ... 9 
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).
This Standard was proposed by and shall be under the jurisdiction of the
National Technical Committee for Standardization of Rare Earth (SAC/TC 229).
Major drafting organizations of this Standard. Jiangxi South Rare Earth High-
tech Co., Ltd, and Guangdong Zhujiang Rare Earth Co., Ltd.
Main drafters of this Standard. Chen Feiyu, Tao Yong, Zhang Shaofu, Xie Liyun,
Wen Shijie, Jin Yanhua and Wang Shuying.
Mixed rare earth oxide of
ion-absorbed type rare earth ore
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
GB/T 16484.12 Chemical analysis methods of rare earth chloride and light
rare earth carbonate - Part 12. Determination of sulfate radical
GB/T 17803 Designation system for rare earth products
3.3.1 The product is light yellow or brownish yellow powder according to
different rare earth compositions.
3.3.2 The product shall be clean, without any visible inclusions.
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.
4.1.2 The method for analyzing the alumina content shall be in accordance
with the provisions of GB/T 18882.2.
4.1.3 The method for analyzing the water content shall be in accordance with
the provisions of GB/T 12690.3.
4.1.4 The method for analyzing the loss on ignition shall be in accordance with
the provisions of GB/T 12690.2.
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.
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.