ISO 3271-2015 PDF

Full title and description

St ISO 3271-2015 — Iron ores for blast furnace and direct reduction feedstocks — Determination of the tumble and abrasion indices. This International Standard specifies a laboratory method giving a relative measure of the resistance of iron ores and ore agglomerates to size degradation caused by impact and abrasion.

Abstract

ISO 3271:2015 defines procedures to determine two comparative indices — a tumble index and an abrasion index — that quantify the tendency of lump ores, sinter and hot‑bonded pellets to degrade in size under impact and abrasive action. The results are intended for quality control, specification and comparative evaluation of feedstocks for blast furnaces and direct reduction processes.

General information

• Status: Published
• Publication date: August 2015
• Publisher: International Organization for Standardization (ISO)
• ICS / categories: 73.060.10 (Iron ores)
• Edition / version: Edition 5 (ISO 3271:2015; revision of ISO 3271:2007)
• Number of pages: 6

Summary information above follows the ISO bibliographic record for ISO 3271:2015.

Scope

ISO 3271:2015 applies to lump iron ores, sinters and hot‑bonded pellets and specifies a method to obtain comparative tumble and abrasion indices as a measure of resistance to size degradation by impact and abrasion. The method is intended for laboratory determination to support quality control, material specification and comparative assessments between lots or sources.

Key topics and requirements

• Definition of tumble index and abrasion index and their significance for blast‑furnace and direct‑reduction feedstocks.
• Test principle: controlled tumbling/abrading of a representative test portion followed by sieving and mass measurement to calculate indices.
• Requirements for sampling and sample preparation to obtain a representative test portion (refer to sampling standards for detailed procedures).
• Apparatus and consumables: tumbling drum/tumbler, sieves, balances and ancillary equipment meeting specified accuracy and construction characteristics.
• Test procedure steps, calculations for indices, result expression and reporting requirements (including identification of sample, test conditions and any deviations).
• Notes on interpretation: indices are comparative measures useful for QC and contractual specifications but do not replace process trials or full mechanical‑metallurgical evaluation.

Typical use and users

Used by mining and pelletizing companies, metallurgical laboratories, quality control and inspection bodies, commodity traders and engineering consultancies to: compare mechanical durability of iron ore products, verify conformance with contractual specifications, and support selection of feed materials for blast furnaces and direct‑reduction units.

Related standards

Standards commonly used alongside ISO 3271 include the previous edition ISO 3271:2007 (withdrawn), test methods for direct‑reduced products such as ISO 15967:2007 (tumble and abrasion indices for hot briquetted iron), low‑temperature reduction/disintegration tests ISO 4696‑1:2015 and ISO 4696‑2:2015, and sampling/sample‑preparation standards such as ISO 3082 (sampling and sample preparation procedures).

Keywords

tumble index, abrasion index, iron ore, lump ore, sinter, pellet, mechanical durability, blast furnace feedstock, direct reduction, ISO 3271, physical testing

FAQ

Q: What is this standard?

A: ISO 3271:2015 is an ISO test method that specifies how to determine the tumble and abrasion indices of iron ores and agglomerates to assess their resistance to degradation by impact and abrasion.

Q: What does it cover?

A: It covers the laboratory procedure, apparatus requirements, sample handling, calculations and reporting needed to obtain comparative tumble and abrasion indices for lump ores, sinter and hot‑bonded pellets.

Q: Who typically uses it?

A: Mining companies, pellet producers, metallurgical and QC laboratories, purchasers and traders of iron ore feedstocks, and engineering/consultancy organizations engaged in process design and material specification.

Q: Is it current or superseded?

A: ISO 3271:2015 is the current published version (published August 2015) and it replaces ISO 3271:2007; users should check with their national standards body or ISO for any subsequent reviews or amendments.

Q: Is it part of a series?

A: It is part of the suite of ISO standards covering physical testing and evaluation of iron ores and agglomerates (committee ISO/TC 102/SC 3). Related documents address reducibility, reduction‑disintegration and sampling procedures (examples: ISO 4696‑1/‑2, ISO 15967, ISO 3082).

Q: What are the key keywords?

A: tumble index; abrasion index; iron ore durability; sinter; pellets; blast furnace feedstock; direct reduction; mechanical testing; ISO 3271.