BS ISO 12742-2020 Copper, lead and zinc sulfide concentrates一 Determination of transportable moisture limits一Flow-table method.
1 Scope
This document specifies a 1lowtable method for the determrnation of the transportable moisture limit (TML) of coppes lead and zinc sulfide concentrates, which can liquefy dunng transporl
It is applicable to the detcrmrnation nithe TML of concentrates containing 10% to HO % (mass fraction) of lead. 10% to 65% macc 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).
2 NormatIve references
The following docunwnts are referred to in the text lii such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. Far undated r-eferences, the latest edition of the referenced document (induding any amendmentsi applies.
ISO 10251. Copper, ka4 zinc and .Hckei Concentrates — 1)etermmauon of moss loss of bulk mat erloi on drying ISO 12743, Copper. kod zinc and nickel concentrates — Sampling procedures for determination o(nwtal and moisture content
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
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3.1 flow moisture point
percentage or moisture at which a flow state is reached
transportable moisture limit
maximum percentage of moisture that a cargo can contain duflng transport without the risk of liquefaction
4 PrincIple
The moisture content of the sample ii adjusted by mixing 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 tle while observing the behaviour of the sample. When sufficient water has been added to the sample so that.BS ISO 12742 pdf download.