ISO 21283:2018
Iron ores — Determination of specific surface area — Test method using air-permeability apparatus (Blaine)
ISO 21283:2018 specifies a method to determine the fineness of iron ores in terms of specific surface area, using the manual Blaine air-permeability apparatus.
ISO 21283:2018 is applicable to pellet feeds in the range of 400 cm2/g to 2 500 cm2/g of specific surface area.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Sampling, sample preparation and preparation of test portions
5.1 Sampling and sample preparation
5.2 Preparation of test portions
6 Apparatus
6.1 General
6.2 Specific
7 Procedure
7.1 Calibration of apparatus
7.1.1 General
7.1.2 Measurement of cell volume
7.1.3 Determination of the mass of CRM
7.1.4 Preparation of the compacted bed of CRM
7.1.5 Determination of the equipment constant, K1
7.2 Permeability test with the pellet feed sample
7.2.1 Mass of the test portion
7.2.2 Preparation of the bed of the test portion
7.2.3 Permeability tests
8 Expression of results
8.1 Calculation of the Blaine specific area (BSA)
8.2 Repeatability and acceptance of test results
9 Test report
10 Verification
Annex A (normative) Flowchart of the procedure for the acceptance of test results
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Sampling, sample preparation and preparation of test portions
5.1 Sampling and sample preparation
5.2 Preparation of test portions
6 Apparatus
6.1 General
6.2 Specific
7 Procedure
7.1 Calibration of apparatus
7.1.1 General
7.1.2 Measurement of cell volume
7.1.3 Determination of the mass of CRM
7.1.4 Preparation of the compacted bed of CRM
7.1.5 Determination of the equipment constant, K1
7.2 Permeability test with the pellet feed sample
7.2.1 Mass of the test portion
7.2.2 Preparation of the bed of the test portion
7.2.3 Permeability tests
8 Expression of results
8.1 Calculation of the Blaine specific area (BSA)
8.2 Repeatability and acceptance of test results
9 Test report
10 Verification
Annex A (normative) Flowchart of the procedure for the acceptance of test results