Overview
ISO 10752:2019 - "Coal sizing equipment - Performance evaluation" defines standardized principles and methods for expressing the results of performance tests on coal sizing equipment. The document covers performance parameters, test procedures, size-measurement techniques and recommended presentation formats for devices used in coal preparation, including screens, classifiers, and other sizing equipment. The standard is written for two‑product separations; multiproduct separations can be assessed as a series of two‑product tests.
Key technical topics and requirements
- Scope and equipment categories: Applies to all sizing equipment types (screens, classifiers, others) and focuses on two‑product separations.
- Performance criteria to determine:
- Feed rate (mass/volume)
- Reference size of separation (partition size and/or equal errors size)
- Sharpness of separation (expressed as probable error)
- Misplaced material and its distribution by size
- Material placement efficiencies (coarser Ef, finer Ec) and overall separation index
- Degree of difficulty (near‑size material) and other feed characteristics
- Performance parameters and metrics: The standard defines theoretical yield, partition curve, partition size, equal‑errors size, misplaced‑material curves, material placement efficiency, and near‑size material-all used for consistent performance expression.
- Test procedures and sampling:
- No single test procedure fits all equipment; the standard gives general recommendations on feed/product flow measurement (weighing, belt weighers, timed increments) and representative sampling.
- Sampling and size analyses should follow compatible methods with the equipment principle (e.g., sieving for screens, cyclone series for cyclones). Sieving guidance refers to ISO 1953.
- Yield determination can be by direct mass measurement or, where necessary, by size analyses (Annex A).
- Analytical and presentation methods: Reconstituted feed size distribution, partition curve, misplaced material curves, tabular and graphical presentation requirements and worked examples (vibrating screen, cyclone, deduster) are included.
Practical applications and users
ISO 10752:2019 is intended for:
- Coal preparation and mineral processing engineers conducting performance tests
- Equipment manufacturers validating and comparing screens, cyclones, and classifiers
- Test laboratories and quality assurance teams reporting separation performance
- Plant operators and procurement teams evaluating equipment selection and predicting separation results
Use cases include objective comparison of different sizing devices, design validation, commissioning tests, and producing standardized test reports to support procurement and process optimization.
Related standards
Keywords: ISO 10752:2019, coal sizing equipment, performance evaluation, partition size, sharpness of separation, material placement efficiency, screens, classifiers, size analysis, sieving, cyclone.