ISO 12742:2020
Copper, lead and zinc sulfide concentrates — Determination of transportable moisture limits — Flow-table method
This document specifies a flow-table method for the determination of the transportable moisture limit (TML) of copper, lead and zinc sulfide concentrates, which can liquefy during transport.
It is applicable to the determination of the TML of concentrates containing 10 % to 80 % (mass fraction) of lead, 10 % to 65 % (mass fraction) of zinc or 10 % to 55 % (mass fraction) of copper and is applicable to TML values in the range 3 % to 28 % (mass fraction).
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Sampling and sample preparation
6.1 General
6.2 Laboratory sample
6.3 Sample preparation
7 Procedure
7.1 General
7.2 Preparation of test portions
7.2.1 General
7.2.2 Filling the mould
7.2.3 Tamping pressure
7.2.4 Tamping procedure
7.2.5 Removal of the mould
7.2.6 Dropping the flow table
7.3 Identification of the flow state
7.4 Preliminary flow moisture point
7.4.1 Preparation of test portion
7.4.2 Determination of preliminary flow moisture point
7.4.3 Addition of water for preliminary flow moisture point test
7.4.4 Treatment of sample received above the flow moisture point
7.5 Main flow moisture point determination
7.5.1 Preparation of test portions
7.5.2 Determination of main flow moisture point
7.5.3 Addition of water for main flow moisture point determination
7.6 Graphical method
7.6.1 Preparation of test portions
7.6.2 Determination of flow moisture point
7.7 Moisture determination
8 Expression of results
8.1 Main flow moisture point
8.2 Flow moisture point determined by the graphical method
9 Validation of main flow moisture point
10 Test report
Annex A (normative) Description of equipment used to determine TML
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Sampling and sample preparation
6.1 General
6.2 Laboratory sample
6.3 Sample preparation
7 Procedure
7.1 General
7.2 Preparation of test portions
7.2.1 General
7.2.2 Filling the mould
7.2.3 Tamping pressure
7.2.4 Tamping procedure
7.2.5 Removal of the mould
7.2.6 Dropping the flow table
7.3 Identification of the flow state
7.4 Preliminary flow moisture point
7.4.1 Preparation of test portion
7.4.2 Determination of preliminary flow moisture point
7.4.3 Addition of water for preliminary flow moisture point test
7.4.4 Treatment of sample received above the flow moisture point
7.5 Main flow moisture point determination
7.5.1 Preparation of test portions
7.5.2 Determination of main flow moisture point
7.5.3 Addition of water for main flow moisture point determination
7.6 Graphical method
7.6.1 Preparation of test portions
7.6.2 Determination of flow moisture point
7.7 Moisture determination
8 Expression of results
8.1 Main flow moisture point
8.2 Flow moisture point determined by the graphical method
9 Validation of main flow moisture point
10 Test report
Annex A (normative) Description of equipment used to determine TML
Bibliography