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GB/T 16479-2020: Light rare earth carbonate Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 16479: Historical versions
Similar standardsGB/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/GBT16479-2020GB 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 ContentsForeword... 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... 8ForewordThis 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 carbonate1 ScopeThis 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 referencesThe 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 oxides3 Technical requirements3.1 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 methods4.1 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 rules5.1 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 certificate6.1 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. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 16479-2020 be delivered?Answer: The full copy PDF of English version of GB/T 16479-2020 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 16479-2020_English with my colleagues?Answer: Yes. 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