GB/T 28882-2012 English PDF (GBT28882-2012)

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GB/T 28882-2012: Rare earth carbonate of ion-absorbed type rare earth ore
GB/T 28882-2012
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.99
H 65
GB/T 28882-2012
Rare earth carbonate of ion-absorbed type rare earth ore
离子型稀土矿碳酸稀土
ISSUED ON: NOVEMBER 05, 2012
IMPLEMENTED ON: MAY 01, 2013
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.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Requirements ... 5
4 Test methods ... 5
5 Inspection rules ... 6
6 Marking, packaging, transportation, storage and quality certificates ... 7
Rare earth carbonate of ion-absorbed type rare earth ore
1 Scope
This Standard specifies the requirements, test methods, inspection rules and packaging,
marking, transportation, storage and quality certificates of rare earth carbonate of ion-
absorbed type rare earth ore.
This Standard applies to rare earth carbonate of ion-absorbed type rare earth ore, which
are mainly used as raw materials for grouping rare earths or separating single rare earth
compounds.
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 and expression and judgement
of limiting values
GB/T 14635 Rare earth metals and their compounds - Determination of total rare
earth content
GB/T 16484.12 Chemical analysis methods of rare earth chloride and light rare earth
carbonate - Part 12: Determination of sulfate radical
GB/T 16484.18 Chemical analysis methods of rare earth chloride and light rare earth
carbonate - Part 18: Determination of ignition loss content in light rare earth
carbonate - Gravimetry
GB/T 16484.21 Chemical analysis methods of rare earth chloride and light rare earth
carbonate - Part 21: Determination of iron oxide content - 1,10-phenanthroline
spectrophotometry
GB/T 17803 Designation system for rare earth products
GB/T 18882.1 Chemical analysis methods of mixed rare earth oxide of ion-absorbed
type RE ore - Determination of fifteen REO relative content
GB/T 18882.2 Chemical analysis methods for mixed rare earth oxide of ion-
absorbed type RE ore - Determination of aluminum oxide content
4.1.4 The analysis method of Al2O3 in products shall be carried out in accordance with
the provisions of GB/T 18882.2.
4.1.5 The analysis method of SO42- in products shall be carried out with reference to the
provisions of GB/T 16484.12.
4.1.6 The analysis method of loss on ignition in products shall be carried out in
accordance with the provisions of GB/T 16484.18.
4.1.7 The analysis of SiO2 and ammonia nitrogen in products shall be carried out in
accordance with the method negotiated by the supplier and purchaser.
4.2 Rounding off of numerical values
Carry out in accordance with the provisions of GB/T 8170.
4.3 Product appearance
Check visually.
5 Inspection rules
5.1 Inspection and acceptance
5.1.1 The products shall be inspected by the supplier’s quality inspection department.
It shall ensure that the products comply with the provisions of this Standard and fill in
product quality certificates.
5.1.2 The purchaser shall inspect the received products. If the inspection results are
inconsistent with the provisions of this Standard, it shall report it to the supplier within
2 months from the date of receipt of the products, and the supplier and purchaser will
negotiate and resolve. If arbitration is needed, an organization recognized by both
parties can be entrusted to conduct the arbitration, and samples can be taken jointly at
the purchaser’s.
5.2 Batching
The products shall be submitted for inspection in batches, each batch shall be composed
of products of the same designation, and the net weight of each batch shall not exceed
40 t.
5.3 Inspection items
Each batch of products shall be inspected for chemical composition and appearance.
5.4 Sampling and sample preparation
The arbitration sampling of chemical composition is taken from each bag in each batch.
The sampling volume of each bag in each batch is 100 g ~ 200 g. After thoroughly
mixing the sample, quickly reduce it to the required amount of sample and put it into
the sample bag and seal it.
5.5 Judgment of inspection results
5.5.1 If the chemical composition arbitration analysis results are inconsistent with the
provisions of this Standard, double samples will be taken from the batch of products to
conduct repeated tests on the unqualified items. If there are still unqualified test results,
the batch of products will be judged to be unqualified.
5.5.2 If the appearance inspection results are inconsistent with the provisions of this
Standard, the batch of products will be directly judged to be unqualified.
6 Marking, packaging, transportation, storage and quality
certificates
6.1 Marking and packaging
6.1.1 Indicate on the outside of each bag:
a) name of supplier;
b) product name and designation;
c) batch number;
d) net weight, gross weight;
e) date of manufacture;
f) “RAINPROOF” marking or words.
6.1.2 The inner packaging of products is a plastic bag with a seal, and the outer
packaging is a woven bag with a seal. The net weight of each bag is 40 kg. If the
purchaser has special requirements, the supplier and purchaser will negotiate separately.
6.2 Transportation and storage
The products must be protected from rain during transportation. They must be stored in
a dry place and must not be stacked in the open.
6.3 Quality certificates
Each batch of products shall be accompanied by a quality certificate, indicating: