British Standards Institution

Source:: ISO
Committee:: ISE/58 - (Disbanded 23.05.22) Iron ores
Categories:: Standardization. General rules | Manufacturing | Mining and minerals | Metalliferous metals | Iron ores

Scope

This International Standard specifies an EDTA photometric titration method using fusion decomposition for the determination of the total iron content of iron ores. This method is applicable to a concentration range of 37,00 % to 72,00 % (m/m) of total iron in natural iron ores, iron ore concentrates, and agglomerates, including sinter products.

Purpose

At the SC 2 meeting in SHENYANG 2018, the delegates accepted the Convener’s report of WG53 (N 2297) and agree to form a new Study Group (SG 35) to investigate the new wet chemistry method developed by Professor Subiao Peng. The delegates agree that a call for experts to join SG 35 will be made via CIB ballot, with interest in participation indicated by delegates from the following countries: Australia, Brazil, Canada, China, Japan, South Africa, and Sweden. see Resolution 6 : ISO/TC102 SC2 N2317 Resolutions of 28th Meeting 2018 Shenyang V12. The result of CIB ballot showed that 10 member committees agreed to register this PWI at Stage 00.99 and the designation of this PWI as ISO/PWI 21826-2, Zero vote against, and 5 abstentions due to lack of national expert input. Three countries (Brazil, China and Sweden) agree to participate in SG35 to investigate this project. The draft of the method was presented in ISO/TC102 SC2 N2333. This method uses fusion decomposition combined with EDTA titration technique, is promising with good accuracy and does not rely on microwave digestion equipment. The precision test within China labs meet the expectations for: m= 35%-72%, Sd =0.077%, SL =0.073%, SR=0.114%, r=0.21%, P=0.28%, R=0.32%

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal

Proposal start date:

29/10/2021

Proposal end date:

12/12/2021

2. Draft

3. Public Comments

4. Comment Resolution

5. Approval

6. Publication

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Standards Development

ISO/PWI 21826-2 - Iron ores — Determination of total iron content — EDTA photometric titration method — Part 2: Fusion decomposition method

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