ISO 567:2021

Coke - Determination of bulk density in a small container

This document specifies a method for the determination of the bulk density of coke in a cubical or cylindrical container of small capacity (0,2 m3). It is applicable to coke with a nominal top size not greater than 125 mm.

Coke — Détermination de la masse volumique en vrac dans un récipient de petites dimensions

General Information

• Status: Published
• Publication Date: 26-Aug-2021
• ICS: 75.160.10 - Solid fuels
• Technical Committee: ISO/TC 27/SC 3 - Coke
• Drafting Committee: ISO/TC 27/SC 3 - Coke
• Current Stage: 6060 - International Standard published
• Start Date: 27-Aug-2021
• Due Date: 31-May-2022
• Completion Date: 27-Aug-2021

Relations

• Revises: ISO 567:1995 - Coke - Determination of bulk density in a small container
• Effective Date: 23-Apr-2020

Overview

ISO 567:2021 is an internationally recognized standard developed by the International Organization for Standardization (ISO) that specifies a precise method for determining the bulk density of coke using a small container. This standard applies specifically to coke samples with a nominal top size not greater than 125 mm and involves measuring the mass of coke in a cubical or cylindrical container with a capacity of 0.2 cubic meters. Bulk density measurement is crucial for understanding the physical characteristics of coke, such as particle shape and size distribution, which impact its behavior in industrial applications.

Key Topics

• Scope of Measurement
  ISO 567:2021 targets the determination of coke bulk density in small containers, either cubical or cylindrical, with a volume of 0.2 m³.

• Sample Preparation and Sampling Techniques
  Representative coke samples should be collected according to ISO 13909-5 or ISO 18283 standards to ensure consistent and reliable testing results. Recommended sample masses range from 600 kg to 1,000 kg depending on particle size.

• Apparatus Specifications
  The standard requires a rigid, waterproof container with a smooth inner surface and precisely known volume. Weighing equipment with accuracy better than 0.1% error or 250 g is essential for both empty and filled container masses.

• Test Procedure
  The process includes:

  • Determining the empty container mass and verifying its volume using water filling.
  • Charging the container with coke in layers with a controlled fall height (not exceeding 250 mm).
  • Leveling the surface and weighing the container plus coke.
  • Performing duplicate tests for accuracy.
  • Measuring total moisture content following ISO 579 and applying it to calculate dry bulk density.

• Calculations and Results Reporting
  Bulk density is calculated as the mass of coke per container volume, corrected for moisture content. Results must be reported to three significant figures and include test conditions, sample information, and moisture content for transparency.

• Precision and Repeatability
  The standard specifies that duplicate tests by the same operator should not vary by more than 30 kg/m³, assuring test repeatability. However, reproducibility between laboratories is not defined due to potential sample alterations during transport.

Applications

The ISO 567:2021 method is widely used in industries where coke quality and characteristics substantially impact operational efficiency and product quality, including:

• Metallurgical Processes
  Precise bulk density data are essential in blast furnace operations and coke handling to optimize combustion, packing, and airflow.

• Quality Control and Product Specification
  Coke producers and consumers use this standard to verify product quality, ensuring that coke meets specified physical requirements.

• Research and Development
  Bulk density measurements contribute to developing new coke types or refining existing products by analyzing physical behavior in controlled conditions.

• Material Handling and Storage
  Determining coke bulk density helps design appropriate storage containers, transport mechanisms, and handling protocols based on material weight and volume relationships.

Related Standards

ISO 567:2021 complements and references several related ISO standards for comprehensive coke analysis, including:

• ISO 579 - Coke: Determination of total moisture content, crucial for dry basis bulk density calculations.
• ISO 728 - Coke: Size analysis by sieving, for understanding particle size distribution.
• ISO 13909-5 and ISO 13909-6 - Hard coal and coke mechanical sampling and sample preparation protocols.
• ISO 18283 - Manual sampling methods for coke ensuring representative sample acquisition.
• ISO 1013 - Coke: Determination of bulk density in large containers, providing an alternative approach for larger volume samples.

By adhering to ISO 567:2021, industries worldwide can achieve standardized, accurate, and reliable coke bulk density measurements essential for process optimization and product consistency. For more information or to obtain the standard, visit ISO’s official website.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 567
Third edition
2021-08
Coke — Determination of bulk density
in a small container
Coke — Détermination de la masse volumique en vrac dans un
récipient de petites dimensions
Reference number
©
ISO 2021
© ISO 2021
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii © ISO 2021 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Apparatus . 1
6 Test sample . 2
7 Procedure. 2
8 Expression of results . 2
9 Precision . 3
9.1 Repeatability . 3
9.2 Reproducibility . 3
10 Test report . 3
Bibliography . 4
Foreword
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electrotechnical standardization.
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described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
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iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 27, Coal and coke, Subcommittee SC 3,
Coke.
This third edition cancels and replaces the second edition (ISO 567:1995), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— General and technical revision.
— The container to be used for determination of coke bulk density can either be cubical or cylindrical
in shape with a capacity 0,2 m .
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2021 – All rights reserved

Introduction
The bulk density of coke depends on its physical characteristics, e.g. apparent relative density, shape
and size of the coke particles, and on the dimensions of the container. The container specified in this
International Standard has a capacity of 0,2 m . The
...