Overview - ISO 3082:2017 (Iron ores - Sampling and sample preparation procedures)
ISO 3082:2017 defines the theory, principles and basic requirements for sampling and sample preparation of iron ores (natural and processed, e.g., concentrates, pellets, sinters). The standard covers mechanical and manual sampling of lots under transfer - typically during loading and discharging by belt conveyors and other ore-handling equipment - to determine chemical composition, moisture content, particle size distribution and other physical/metallurgical properties. Bulk density is excluded and is obtained using ISO 3852 (Method 2).
Keywords: ISO 3082:2017, iron ores sampling, sample preparation, mechanical sampling, manual sampling, belt conveyor sampling, moisture content, chemical composition.
Key technical topics and requirements
- Fundamentals and theory: Minimization of sampling bias, particle-size degradation, and procedures to achieve representative increments and overall precision.
- Sampling schemes and system verification: How to establish sampling plans, verify performance and check precision and bias.
- Methods of sampling: Mass-basis and time-basis sampling, stratified random sampling, sampling intervals, increment mass and number of increments.
- Sampling from moving streams: Design and placement of primary samplers, cutter types, aperture and speed considerations, safety, robustness and versatility of installations.
- Sample preparation processes: Drying, crushing, grinding, mixing, division (mechanical and manual), and preparing test samples to nominal top sizes (e.g., 250 µm; further grinding to 100 µm or 160 µm where required).
- Online preparation and equipment: Crushers, dividers, dryers and flowsheet examples for automated sampling systems.
- Special situations: Sampling from trucks, wagons, ships, stockpiles and stopped-belt reference sampling.
- Quality control and documentation: Requirements for checking precision and bias, reserve samples, packing and marking, and maintenance/cleaning of samplers.
- Normative references and formulae: Includes mathematical formulae for number of increments (Annex B) and inspection guidance (Annex A).
Practical applications and target users
ISO 3082:2017 is used to ensure representative sampling and reproducible results for:
- Mining and iron-ore producers (ore handling and transfer points)
- Port and bulk handling operators (loading/discharging by belt conveyors)
- Metallurgical plants and pellet/sinter producers (quality control)
- Analytical and QA/QC laboratories (sample preparation protocols)
- Equipment manufacturers (design of mechanical samplers, cutters, dividers)
- Traders, inspectors and auditors involved in contractual quality verification
Adopting ISO 3082 helps reduce commercial disputes, improve laboratory reproducibility and provide defensible data for metallurgical accounting, moisture determination and particle size analysis.
Related standards
- ISO 3852 (Method 2) - referenced for bulk density determination.
- Consult other ISO and industry sampling and testing standards for complementary analytical methods and reporting.
