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Similar standardsGB/T 24487-2022: Alumina---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/GBT24487-2022GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 71.100.10 CCS H 30 Replacing GB/T 24487-2009 Alumina 氧化铝 Issued on: MARCH 09, 2022 Implemented on: OCTOBER 01, 2022 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 Terms and definitions... 6 4 Designation... 6 5 Requirements... 6 6 Test methods... 8 7 Inspection rules... 9 8 Marking, packaging, transportation, storage and quality certificate... 10 9 Order form (or contract) contents... 11 Bibliography... 12ForewordThis document was drafted in accordance with the rules given in GB/T 1.1-2020, Directives for standardization - Part 1.Rules for the structure and drafting of standardizing documents. This document replaces GB/T 24487-2009, Alumina. Compared with GB/T 24487- 2009, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) Change the scope of application (see Chapter 1; Chapter 1 of the 2009 edition); b) Change the classification of alumina designations, add AO-G designation, and delete AO-3 designation (see Chapter 4; 3.1 of the 2009 edition); c) Change the requirements for chemical compositions and physical properties (see 5.1 and 5.2; 3.2 and 3.3 of the 2009 edition); d) Change the calculation rules for Al2O3 content (see 6.1.2; 3.2.1 of the 2009 edition); e) Change the contents of inspection and acceptance (see 7.1; 5.1 of the 2009 edition); f) Change the provisions on batch weight in batch (see 7.2; 5.2 of the 2009 edition); g) Add requirements for sample preparation (see 7.4.3). Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying patents. This document was proposed by the China Nonferrous Metals Industry Association. This document shall be under the jurisdiction of National Technical Committee 243 on Nonferrous Metals of Standardization Administration of China (SAC/TC 243). Drafting organizations of this document. China Aluminum Shandong Co., Ltd., Aluminum Corporation of China Limited, Shandong Hongqiao New Material Co., Ltd., Chalco Zhengzhou Nonferrous Metals Research Institute Co., Ltd., Yunnan Aluminium Co., Ltd., Yunnan Wenshan Aluminum Co., Ltd., China Aluminum Mining Company Limited, Shandong Nanshan Aluminium Co., Ltd., Zhongdiantou Shanxi Aluminum Co., Ltd., Baotou Aluminum Co., Ltd. Main drafters of this document. Sun Hongxi, Qian Jize, Han Jizeng, Cao Jianjun, Song Jianghong, Shi Lei, Liu Huijun, Li Zhigang, Sun Yuanlin, Shao Jing, Sun Shuju, Zhang Jingbo, Zhu Yangkun, Tian Rui, Pan Shoudao, Fang Hui, Song Dawei, Zhang Xiaoping. Alumina1 ScopeThis document specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation, storage, quality certificate and order form (or contract) contents of alumina (Al2O3). This document applies to alumina produced from raw materials such as bauxite, recycled alumina raw materials, etc., used for the production of metallic aluminum by molten salt electrolysis, as well as to alumina used as raw materials for the production of corundum, ceramics, refractory products and other alumina chemical products.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 6609.1, Chemical analysis methods and determination of physical performance of alumina - Part 1.Determination of trace elements content - Inductively coupled plasma atomic emission spectrometry method GB/T 6609.2, Chemical analysis methods and determination of physical performance of alumina - Part 2.Determination of loss of mass at 300 ℃ and 1 000 ℃ GB/T 6609.3, Chemical analysis methods and Determination of physical performance of alumina - Determination of silicon dioxide content - Molybdenum blue photometric method GB/T 6609.4, Chemical analysis methods and determination of physical performance of alumina - Determination of ferric oxide content - Orthophenanthroline photometric method GB/T 6609.5, Chemical analysis methods and Determination of physical performance of alumina - Determination of sodium oxide content GB/T 6609.13, Chemical analysis methods and Determination of physical performance of alumina - Determination of calcium oxide content - Flame atomic absorption spectrophotometric method GB/T 6609.24, Chemical analysis methods and Determination of physical performance of alumina - Measurement of the angle of repose GB/T 6609.25, Chemical analysis methods and determination of physical performance of alumina - Part 25.Method for the determination of tapped and untapped density GB/T 6609.27, Chemical analysis methods and determination of physical performance of alumina - Part 27.Particle size analysis - Sieves method GB/T 6609.30, Chemical analysis methods and determination of physical performance of alumina - Part 30.Determination of trace elements - Wavelength dispersive X-ray fluorescence spectrometric method GB/T 6609.32, Chemical analysis methods and determination of physical performance of alumina - Part 32.Determination of a-alumina content by X-ray diffraction GB/T 6609.33, Chemical analysis methods and determination of physical performance of alumina - Part 33.Determination of attrition index GB/T 6609.35, Chemical analysis methods and determination of physical performance of alumina - Part 35.Determination of specific surface area - Nitrogen adsorption method GB/T 6609.36, Chemical analysis methods and determination of physical performance of alumina - Part 36.Determination of flow time GB/T 8170, Rules of rounding off for numerical values & expression and judgement of limiting values GB/T 19077.1, Particle size analysis - Laser diffraction method3 Terms and definitionsNo terms and definitions need to be defined in this document.4 DesignationAlumina is divided into three designations according to its main chemical compositions and physical properties. AO-G, AO-1 and AO-2.5 Requirements5.1 Chemical compositions6 Test methods6.1 Chemical compositions 6.1.1 The chemical compositions of alumina shall be calculated on a dry basis after drying at 300 ℃ ± 5 ℃ for 2 h. 6.1.2 Calculation of Al2O3 content. 100% minus the contents of SiO2, CaO, Fe2O3, Na2O and the loss on ignition. 6.1.3 The contents of SiO2, Fe2O3, Na2O, CaO and other compositions shall be determined in accordance with the provisions of GB/T 6609.3, GB/T 6609.4, GB/T 6609.5 and GB/T 6609.13, or in accordance with the provisions of GB/T 6609.1 and GB/T 6609.30.GB/T 6609.3, GB/T 6609.4, GB/T 6609.5 and GB/T 6609.13 are arbitration methods. 6.1.4 The determination of loss on ignition shall be carried out in accordance with the provisions of GB/T 6609.2. 6.1.5 The determination of trace element contents such as Mn, V, Zn, Ti, Ga, K, etc. shall be carried out in accordance with the provisions of GB/T 6609.1. 6.2 Physical properties 6.2.1 The specific surface area shall be determined in accordance with the provisions of GB/T 6609.35. 6.2.2 The content of particles with a particle size less than 45 μm and particles with a particle size greater than or equal to 150 μm in the particle size distribution shall be determined in accordance with the provisions of GB/T 6609.27. 6.2.3 The content of particles with a particle size less than 20 μm in the particle size distribution shall be determined in accordance with the provisions of GB/T 19077.1. 6.2.4 The flow time shall be determined in accordance with the provisions of GB/T 6609.36. 6.2.5 The angle of repose shall be determined in accordance with the provisions of GB/T 6609.24. 6.2.6 The attrition index shall be determined in accordance with the provisions of GB/T 6609.33. 6.2.7 The α-Al2O3 content shall be determined in accordance with the provisions of GB/T 6609.32. 6.2.8 The bulk density shall be determined in accordance with the provisions of GB/T 6609.25. 6.3 Appearance quality The appearance quality of alumina shall be inspected visually.7 Inspection rules7.1 Inspection and acceptance 7.1.1 Alumina shall be inspected by the supplier's technical supervision department to ensure that the product quality complies with the provisions of this document and to fill in the product quality certificate. 7.1.2 The buyer shall inspect the received products in accordance with the provisions of this document. If the inspection results are inconsistent with the provisions of this document, it shall be reported to the supplier within 30 days from the date of receipt of the product and resolved through negotiation between the supplier and the buyer. If arbitration is required, the arbitration sampling shall be taken on the buyer’s side and carried out by the supplier and the buyer jointly. 7.1.3 If necessary, the buyer may, in accordance with the terms of the order form (or contract), enter the supplier's site to conduct pre-delivery inspection and acceptance of the products to be delivered. 7.2 Batch Alumina shall be submitted for inspection in batches. Each batch shall consist of products of the same designation. The weight of each batch of bagged alumina or bulk alumina in tank trucks shall not exceed 2 000 tons. 7.3 Inspection items Each batch of alumina shall be inspected for chemical composition, physical properties and appearance quality. 7.4 Sampling and sample preparation 7.4.1 Sampling during production process Manufacturers can refer to GB/T 6609.22 to develop sampling plans for the production process and use them as the basis for factory inspection. 7.4.2 Arbitration sampling 7.4.2.1 For each batch of bagged alumina, at least 20 bags shall be randomly selected. Insert a copper (or stainless-steel) tube probe with a diameter of 15 mm ~ 20 mm along 8.2.1 The outer packaging of alumina shall be made of polypropylene plastic woven bags or other materials suitable for product packaging, transportation and storage to ensure that the product quality meets the technical requirements of this document. 8.2.2 When the product is delivered, the compartment shall be cleaned or covered with protective materials. Products of different designations shall not be mixed. 8.2.3 Products shall be stored in batches in a clean, dry warehouse and shall not be contaminated. 8.3 Quality certification Each batch of products shall be accompanied by a quality certificate, which indicates. a) supplier information; b) product name and designation; c) batch number and net content; d) analysis and inspection results and the stamp of the supplier’s technical (quality) supervision department; e) a reference to this document; f) production date or packaging date.9 Order form (or contract) contentsThe order form (or contract) for the materials listed in this document shall include the following. a) product name; b) designation; c) net content; d) a reference to this document; e) others. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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