AS ISO 12742:2021 pdf free download – Copper, lead and zinc sulfide concentrates-Determination of transportable moisture limits – Flow-table method

AS ISO 12742:2021 pdf free download – 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) olcopper, 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) olcopper and is applicable to TML. values in the range 3 % to 28% (mass fraction).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edEtlon cited appllcs For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 10251, Copper, lead, zinc and nickelconcentrutes — Determination of moss loss of bulk material on dryin,q ISO 12743, Copper, lead, zinc and nickel concentrates — Sampling procedures for determination of metal and moisture content
3 Terms and definitions
For the purposes ol this document, the following terms and dehnitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www .orJobp
— IEC Electropedia: available at http://www.electropedia,org/
3.1
flow moisture point
percentage of moisture at which a flow state Is reached
transportable moisture limIt
maximum percentage o moisture that a cargo can contain during transport without the risk of liquefaction
4 Principle
The moisture content of the sample is adlusted by mxlng with water. The mixture Is converted to a conical shape using a mould and tamper. The sample is placed on the flow table and the mould is removed. The flow characteristics are determined by repeated dropping of’ the flow table while observing the behaviour of the sample. When sufficient water has been added to the sample so that plastic deformation occurs during the dropping of the flow table, the sample Is considered to be at its flow moisture point.
The TMI. is calculated as 90 % of the flow moisture point.
This document specifies a flow-table method for the determination of the transportable moisture limit (TML) olcopper, 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) olcopper and is applicable to TML. values in the range 3 % to 28% (mass fraction).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edEtlon cited appllcs For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 10251, Copper, lead, zinc and nickelconcentrutes — Determination of moss loss of bulk material on dryin,q ISO 12743, Copper, lead, zinc and nickel concentrates — Sampling procedures for determination of metal and moisture content
3 Terms and definitions
For the purposes ol this document, the following terms and dehnitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www .orJobp
— IEC Electropedia: available at http://www.electropedia,org/
3.1
flow moisture point
percentage of moisture at which a flow state Is reached
transportable moisture limIt
maximum percentage o moisture that a cargo can contain during transport without the risk of liquefaction
4 Principle
The moisture content of the sample is adlusted by mxlng with water. The mixture Is converted to a conical shape using a mould and tamper. The sample is placed on the flow table and the mould is removed. The flow characteristics are determined by repeated dropping of’ the flow table while observing the behaviour of the sample. When sufficient water has been added to the sample so that plastic deformation occurs during the dropping of the flow table, the sample Is considered to be at its flow moisture point.
The TMI. is calculated as 90 % of the flow moisture point.