BS ISO 4701:2019

What is BS ISO 4701-Determination of size distribution by sieving about? 

ISO 4701 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 purpose of ISO 4701 is to provide the user with 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. 

Who is ISO 4701-Determination of size distribution by sieving for?  

ISO 4701 on the determination of size distribution by sieving is beneficial for: 

• Manufacturers and producers of iron ore 
• Department of energy and mining 
• Industries and factories of natural gas 
• Chemical engineers 
• Test laboratories 

Why should you use ISO 4701-Determination of size distribution by sieving? 

ISO 4701 helps you to: 

• To measure the mass and calculate the percentage mass of ore or DRI passing or retained on one or more specification sieves 
• To generate an overall size distribution curve 

These guidelines of ISO 4701 help you to segregate iron uniformly through sieving for sale and purchase.  

What’s changed since the last update?  

BS ISO 4701: 2019 supersedes BS ISO 4701:2017, of which it constitutes a minor revision. The following change has been made: 

• In Annex C, a formula has been included to correct the maximum mass to be retained on the sieve at completion of sieving in accordance with the actual bulk density of iron ore