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GB/T 44034-2024: Iron ores - Sampling of slurries
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GB/T 44034-2024: Iron ores - Sampling of slurries

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ICS 73.060.10 CCSD31 National Standards of People's Republic of China Iron ore slurry sampling method (ISO 16742.2014, IDT) Released on 2024-05-28 2024-12-01 implementation State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface III 1 Scope 1 2 Normative references 1 3 Terms and Definitions 2 4 General conditions for slurry sampling 2 5 Basic principles of sampling and sample preparation 5 6 Minimum solid mass of bulk and duplicate samples 10 7 Timed Sampling 11 8 Timing stratified sampling 12 9 Mechanical sampling of dynamic slurry flows 12 10 Manual sampling of dynamic slurry flows 15 11 Sampling of static slurry 16 12 Sample preparation procedure 16 13 Packaging and labeling of samples 17 Appendix A (Informative) Demonstration of the correct design of the slurry sampling device Figure 18 Appendix B (Informative) Demonstration of incorrect design of slurry sampling device Figure 21 Appendix C (Normative) Tools for manual sampling 24 Reference 25

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is equivalent to ISO 16742.2014 "Sampling methods for iron ore slurries". Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by the China Iron and Steel Association. This document is under the jurisdiction of the National Iron Ore and Direct Reduced Iron Standardization Technical Committee (SAC/TC317). This document was drafted by. Baosteel Co., Ltd., Baosteel Zhanjiang Iron & Steel Co., Ltd., Beijing Zhongkuang Dongfang Mining Co., Ltd., Beijing Qidian Technology Co., Ltd. and Metallurgical Industry Information Standards Research Institute. The main drafters of this document are. Chen Hailan, Kang Xiping, Yu Bishuang, Cui Hongwei, Wang Chunsheng, Feng Huibin, Cao Jiangang, Ma Bo, Zhao Jingjing, Duan Guoying, Fu Caiming, and Zhang Junsheng. Iron ore slurry sampling method Warning---This document may involve hazardous materials, operations and equipment. This document does not discuss safety issues related to their use. It is the user's responsibility to determine the applicability of the regulations for safety and health protection prior to use.

1 Scope

This document specifies the basic method for sampling slurries formed by mixing iron ore fines with a nominal maximum particle size of < 1 mm and water. When the mixing ratio is very high, the material is in the form of a paste (about 80% solids, depending on the particle size distribution of the solids). This mixture is exactly called Pastes. This document does not cover the sampling of pastes. The procedures described in this document are applicable to the sampling of iron ore transported in the form of a slurry flow. These slurries can be free fall or Slurry is enclosed in a pipe, chute, chute, spiral or similar conduit. This document does not cover the sampling of slurries in pressure pipes. Satisfactory sampling can only be carried out at a switching point before the pressurized pipe at the end of the pipe when the slurry is no longer under pressure. In addition, sampling of static slurries (e.g. slurries that are settling or agitated in tanks, vessels or dams) is not recommended and is not covered by this document. This document describes procedures designed to provide samples representative of the solids slurry and particle size distribution to be examined. After the slurry sample has been filtered, the wet sample containing the solids in the slurry can be used for drying (if necessary) or for comparing a Chemical or physical measurement of one or more quality characteristics. The sampling methods described in this document are applicable to slurries that require testing to verify compliance with product specifications. The results can be used as the basis for settlements between trading partners or to estimate a set of mean characteristics and variances that describe a system or process. If the flow rate is not too high, compared with other sampling procedures, the reference method is to circulate the entire slurry within the prescribed time or volume interval. Transfer to a container, ensuring that all parts of the slurry flow are transferred to the container in the same period of time. This document is consistent with the ISO 3082 The reference incremental sample is as close as possible to the incremental sample taken by the sampling procedure being evaluated.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. Note. GB/T 10322.1-2014 Iron ore sampling and sample preparation methods (ISO 3082.2009, IDT) ofqualityvariation) Note. GB/T 10322.2-2000 Test method for evaluating quality fluctuation of iron ore (ISO 3084.1998, IDT) Note. GB/T 10322.3-2000 Test method for checking sampling accuracy of iron ore (ISO 3085.1996, IDT) Note. GB/T 10322.5-2016 Determination of moisture content in iron ore delivery batches (ISO 3087.2011, IDT) Note. GB/T 20565-2022 Terminology of iron ore and direct reduced iron (ISO 11323.2010, IDT) ...