ISO 7764:2006
(Main)Iron ores - Preparation of predried test samples for chemical analysis
Iron ores - Preparation of predried test samples for chemical analysis
ISO 7764:2006 specifies a method for the preparation of predried test samples of natural iron ores, and iron ore concentrates and agglomerates, including sinter products, which are to be used for the determination of analytical values of constituents on a dry basis. The method is not applicable to the following types of ores: processed ores containing metallic iron (direct-reduced iron); natural or processed ores in which the mass fraction of sulfur is higher than 0,2 %; natural or processed ores in which the content of combined water is higher than 2,5 % by mass.
Minerais de fer — Préparation des échantillons préséchés pour analyse chimique
General Information
- Status
- Published
- Publication Date
- 26-Apr-2006
- Technical Committee
- ISO/TC 102/SC 2 - Chemical analysis
- Drafting Committee
- ISO/TC 102/SC 2 - Chemical analysis
- Current Stage
- 9093 - International Standard confirmed
- Start Date
- 24-Jun-2022
- Completion Date
- 13-Dec-2025
Relations
- Consolidated By
ISO/TS 17444-1:2012 - Electronic fee collection - Charging performance - Part 1: Metrics - Effective Date
- 06-Jun-2022
- Effective Date
- 15-Apr-2008
Overview
ISO 7764:2006 is an internationally recognized standard developed by ISO that specifies the method for preparing predried test samples of natural iron ores and their concentrates for chemical analysis. This preparation is essential for determining the analytical values of ore constituents on a dry basis, ensuring precise and reproducible chemical composition results. The standard applies specifically to natural iron ores, iron ore concentrates, and agglomerated products such as sinter but excludes certain ore types, including those with high sulfur content, combined water content above defined limits, or containing metallic iron.
Key Topics
Scope and Applicability
The method defined in ISO 7764:2006 is targeted at the preparation of test samples for chemical analysis but excludes:- Processed ores containing metallic iron (direct-reduced iron)
- Ores with sulfur content above 0.2% by mass
- Ores having combined water content greater than 2.5% by mass
Sample Preparation Process
- Drying test samples at a controlled temperature of 105 °C ± 2 °C until constant mass is achieved
- Employing laboratory equipment such as precision balances (minimum readability 0.0001 g), drying ovens, and appropriate weighing bottles (glass or heat-resistant plastic)
- Cooling samples in desiccators with self-indicating silica gel to prevent moisture absorption during weighing
- Using laboratory samples prepared with particle sizes less than 100 µm in accordance with ISO 3082
Quality Control Measures
Ensuring the sample is representative and homogeneous through thorough mixing and multiple incremental sampling
Accurate mass determination by comparing weights before and after dryingNormative References
ISO 7764 refers to complementary standards such as ISO 3082 for sampling and sample preparation and ISO 2596 for hygroscopic moisture determination when applicable.
Applications
ISO 7764:2006 is essential for laboratories and industries involved in iron ore quality assessment, mining operations, and processing plants where accurate chemical analysis of iron ores impacts:
Quality Assurance in Iron Ore Processing
Reliable determination of dry-basis constituent values enables better control over beneficiation and sintering processes.Trade and Contract Compliance
Preparation of standardized test samples supports contractual obligations by ensuring consistent and reproducible chemical assay results.Research and Development
Accurate and standardized sample drying methodologies facilitate research on ore characteristics and metallurgical behaviors.Environmental and Regulatory Reporting
Analytical results derived from properly prepared samples help meet environmental monitoring and reporting requirements.
Related Standards
- ISO 3082:2000 – Iron ores: Sampling and sample preparation procedures for correct laboratory sample representation.
- ISO 2596:1994 – Iron ores: Determination of hygroscopic moisture in analytical samples by gravimetric and Karl Fischer methods. Used when ISO 7764 is not applicable due to moisture constraints.
- Other iron ore relevant ISO standards related to chemical analysis and sample preparation to ensure a comprehensive approach to ore assessment.
Keywords: ISO 7764, iron ores, sample preparation, predried test samples, chemical analysis, iron ore concentrates, sinter products, drying method, laboratory sample, iron ore standard, ISO iron ore standards, ore chemical testing, analytical sample drying, iron ore quality control.
Frequently Asked Questions
ISO 7764:2006 is a standard published by the International Organization for Standardization (ISO). Its full title is "Iron ores - Preparation of predried test samples for chemical analysis". This standard covers: ISO 7764:2006 specifies a method for the preparation of predried test samples of natural iron ores, and iron ore concentrates and agglomerates, including sinter products, which are to be used for the determination of analytical values of constituents on a dry basis. The method is not applicable to the following types of ores: processed ores containing metallic iron (direct-reduced iron); natural or processed ores in which the mass fraction of sulfur is higher than 0,2 %; natural or processed ores in which the content of combined water is higher than 2,5 % by mass.
ISO 7764:2006 specifies a method for the preparation of predried test samples of natural iron ores, and iron ore concentrates and agglomerates, including sinter products, which are to be used for the determination of analytical values of constituents on a dry basis. The method is not applicable to the following types of ores: processed ores containing metallic iron (direct-reduced iron); natural or processed ores in which the mass fraction of sulfur is higher than 0,2 %; natural or processed ores in which the content of combined water is higher than 2,5 % by mass.
ISO 7764:2006 is classified under the following ICS (International Classification for Standards) categories: 73.060.10 - Iron ores. The ICS classification helps identify the subject area and facilitates finding related standards.
ISO 7764:2006 has the following relationships with other standards: It is inter standard links to ISO/TS 17444-1:2012, ISO 7764:1985. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ISO 7764:2006 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 7764
Second edition
2006-05-01
Iron ores — Preparation of predried test
samples for chemical analysis
Minerais de fer — Préparation des échantillons préséchés pour analyse
chimique
Reference number
©
ISO 2006
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Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
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International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 7764 was prepared by Technical Committee ISO/TC 102, Iron ore and direct reduced iron, Subcommittee
SC 2, Chemical analysis.
This second edition cancels and replaces the first edition (ISO 7764:1985), which has been technically revised.
INTERNATIONAL STANDARD ISO 7764:2006(E)
Iron ores — Preparation of predried test samples for chemical
analysis
1 Scope
This International Standard specifies a method for the preparation of predried test samples of natural iron ores,
and iron ore concentrates and agglomerates, including sinter products, which are to be used for the
determination of analytical va
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