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GB/T 25949-2010: Aluminium ores -- Preparation of samples Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 25949-2010: Aluminium ores -- Preparation of samples---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/GBT25949-2010GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 73.060.40 H 30 GB/T 25949-2010 / ISO 6140.1991 Aluminum Ores – Preparation of Samples (ISO 6140.1991, IDT) Issued on: DECEMBER 23, 2010 Implemented on: SEPTEMBER 1, 2011 Issued by. General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 1 Scope... 4 2 Normative References... 4 3 Terms and Definitions... 4 4 Fundamentals of Sample Preparation... 5 5 Precision of Sample Preparation... 15 6 Bias in Sample Preparation... 15 7 Preparation of Samples for the Determination of Total Moisture... 15 8 Preparation of Samples for Chemical Analysis... 16 9 Preparation of Samples for Physical Testing... 17 10 Packing and Labelling of Samples... 18 Annex A (Normative) Sample Preparation Diagrams... 20 Annex B (Informative) Examples of Mechanical Mixers... 22 Annex C (Informative) Mechanical Sample Dividers... 24 Annex D (Informative) Manual Sampling Implements... 28 Annex E (Informative) Examples of Riffles... 30 Annex F (Informative) Particle Size Reduction Equipment... 31ForewordThis Standard was drafted as per the rules specified in GB/T 1.1-2009. This Standard used translation method to equivalently adopt ISO 6140.1991 Aluminum Ores – Preparation of Samples. This Standard’s Annex A is normative; while Annexes B, C, D, E, and F are informative. This Standard shall be under the jurisdiction of National Technical Committee on Nonferrous Metals of Standardization Administration of China (SAC/TC 243). Drafting organizations of this Standard. Aluminum Corporation of China Limited, Shandong Branch; and China Nonferrous Metals Industry Standards, Metrology and Quality Research Institute. Chief drafting staffs of this Standard. Shao Jing, Jiang Tao, Wang Zhaowen, Teng Xiaofeng, Sun Hongxi, Zhong Yimei, and Liu Qian. Aluminum Ores – Preparation of Samples1 ScopeThis Standard specifies methods of treatment of gross samples and subsamples of aluminum ores with a view to the preparation of samples for the determination of moisture, chemical analysis and physical testing. This Standard is applicable to all aluminum ores.2 Normative ReferencesThe following documents are essential to the application of this Document. For the dated documents, only the versions with the dates indicated are applicable to this Document; for the undated documents, only the latest version (including all the amendments) is applicable to this Document. GB/T 25945-2010 Aluminum ores - Sampling procedures (ISO 8685.1992, IDT) GB/T 25947-2010 Aluminum ores - Determination of the moisture content of bulk material (ISO 9033.1989, IDT) GB/T 25950-2010 Aluminum ores - Experimental determination of the heterogeneity of constitution (ISO 6138.1991, IDT) ISO 565.1990 Test sieves - Metal wire cloth, perforated metal plate and electroformed sheet - Nominal sizes of openings3 Terms and DefinitionsFor the purposes of this Standard, the following terms and definitions apply. 3.1 Chemical analysis sample The sample crushed to pass a sieve aperture of 150 μm used for the determination of chemical characteristics of the aluminum ore. 3.2 Division The process of decreasing the sample mass (without modification of the particle size of the constituent parts) where a representative part of the sample is retained while rejecting the ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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