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BS ISO 4695:2021

BS ISO 4695:2021

$102.76

Iron ores for blast furnace feedstocks. Determination of the reducibility by the rate of reduction index

Published By Publication Date Number of Pages
BSI 2021 22
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This document specifies a method to provide a relative measure for evaluating the extent to and ease with which oxygen can be removed from iron ores, when reduced under conditions resembling those prevailing in the reduction zone of a blast furnace.

This document is applicable to lump ores, sinters and hot-bonded pellets.

PDF Catalog

PDF Pages PDF Title
2 National foreword
6 Foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms and definitions
4 Principle
10 5 Sampling, sample preparation and preparation of test portions
5.1 Sampling and sample preparation
5.2 Preparation of test portions
6 Apparatus
13 7 Test conditions
7.1 General
7.2 Reducing gas
7.2.1 Composition
7.2.2 Purity
7.2.3 Flow rate
7.3 Heating and cooling gas
7.4 Temperature of the test portion
14 8 Procedure
8.1 Number of determinations for the test
8.2 Chemical analysis
8.3 Reduction
15 9 Expression of results
9.1 Calculation of the reducibility index
16 9.2 Repeatability and acceptance of test results
10 Test report
17 11 Verification
18 Annex A (normative) Flowsheet of the procedure for the acceptance of test results
19 Annex B (informative) Derivation of equation for reducibility

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BS ISO 4695:2021
$102.76