ISO 4701:2019

Iron ores and direct reduced iron — Determination of size distribution by sieving

This document specifies the methods to be employed for determination of size distributions by sieving of iron ore and direct reduced iron (excluding briquetted iron), utilizing sieves having aperture sizes of 36 µm or larger. The size distribution is expressed in terms of mass and percentage mass, passed or retained on selected sieves. The purpose of this document is to provide a basis for any testing of iron ore and direct reduced iron involving size determination for use by contracting parties in the sale and purchase of these materials. When this document is used for comparative purposes, the concerned parties will agree on the selection of the detailed method to be employed in order to eliminate sources of subsequent controversy.

Minerais de fer et minerais de fer préréduits — Détermination de la granulométrie par tamisage

General Information

• Status: Published
• Publication Date: 15-Apr-2019
• ICS: 73.060.10 - Iron ores
• Technical Committee: ISO/TC 102/SC 1 - Sampling
• Drafting Committee: ISO/TC 102/SC 1 - Sampling
• Current Stage: 9020 - International Standard under periodical review
• Start Date: 15-Apr-2024
• Completion Date: 15-Apr-2024

Relations

• Revises: ISO 4701:2017 - Iron ores and direct reduced iron — Determination of size distribution by sieving
• Effective Date: 23-Apr-2020

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 4701
Fifth edition
2019-04
Iron ores and direct reduced iron —
Determination of size distribution by
sieving
Minerais de fer et minerais de fer préréduits — Détermination de la
granulométrie par tamisage
Reference number
ISO 4701:2019(E)
©
ISO 2019

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ISO 4701:2019(E)

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© ISO 2019
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ii © ISO 2019 – All rights reserved

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ISO 4701:2019(E)

Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principles and planning . 2
4.1 General . 2
4.2 Purpose of the analysis . 2
4.3 Impact of ore and DRI properties . 2
4.3.1 Effect of moisture content. 2
4.3.2 Degradation of material . 3
4.3.3 Magnetic ores . 3
4.4 Nature of sample . 4
4.5 Choice of sieving method . 4
4.6 Maximum particle size permitted on a sieve . 4
4.7 Specified loading of sieves . 5
4.7.1 General. 5
4.7.2 Batch sieving with a single sieve or nest of sieves . 5
4.7.3 Loading of continuous sieving machines . 6
4.8 Sieving time . 6
4.8.1 General.
...