ISO 10143:2019 PDF

Carbonaceous materials for the production of aluminium — Calcined coke for electrodes — Determination of the electrical resistivity of granules

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Title (English):

ISO 10143:2019

Carbonaceous materials for the production of aluminium — Calcined coke for electrodes — Determination of the electrical resistivity of granules

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 5
Publication date:: July 26, 2019
Edition:: ISO IS 10143 edition 3 version 1
ICS:: 71.100.10

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Description (English):

This document specifies a method for the determination of the electrical resistivity of granular carbon (calcined or graphitized) used in the manufacture of carbon electrodes for the production of aluminium. The measurement of electrical resistivity assists in assessing the extent of coke calcination. The electrical resistivity of the coke aggregate will influence the electrical resistivity of the coke electrodes made from it. In general, a more highly calcined coke will have a lower electrical resistivity if other factors, such as grain size, are similar.

Technical details

Technical committee: ISO/TC 226 - Materials for the production of primary aluminium
SKU: ISO 10143:2019

Abstract

Overview

ISO 10143:2019 specifies a laboratory test method for determining the electrical resistivity of granular carbon (calcined or graphitized) used in aluminium electrode manufacture. The standard defines sample preparation, apparatus, test procedure and result expression to assess the degree of coke calcination - a key factor influencing the electrical resistivity of electrodes for aluminium production.

Key topics and technical requirements

Test principle: Place a measured test portion of granules in a cylindrical holder with electrical contacts, apply a fixed mechanical pressure and a constant direct current, then measure the voltage drop and column height to calculate resistivity.
Apparatus essentials:
- Sample holder and plunger with removable base (see figure in standard).
- Length-measuring device (±0.1 mm) and plastic reference cylinder (22 mm ±0.01 mm).
- Test machine able to apply 3 MPa ±1% pressure and limit plunger velocity to ≤10 mm/s.
- Power supply providing 1 A ±0.002 A DC; voltmeter capable of ±0.01 mV resolution.
- Oven for drying (110 °C to 120 °C depending on procedure).
Sample preparation:
- Follow ISO 6375 for sampling.
- For calcined petroleum coke: dry at 110 °C ±5 °C for 12 h, de-oil via solvent extraction (ISO 8723) or heating (ISO 6997), crush and sieve to obtain 1.4 mm to 1.0 mm fraction.
- General preparation: divide by sieving into fractions (>1.0 mm, 0.5–1.0 mm,

Related standards

Standards mentioned in the description

Overview

Key topics and technical requirements

Test principle: Place a measured test portion of granules in a cylindrical holder with electrical contacts, apply a fixed mechanical pressure and a constant direct current, then measure the voltage drop and column height to calculate resistivity.
Apparatus essentials:
- Sample holder and plunger with removable base (see figure in standard).
- Length-measuring device (±0.1 mm) and plastic reference cylinder (22 mm ±0.01 mm).
- Test machine able to apply 3 MPa ±1% pressure and limit plunger velocity to ≤10 mm/s.
- Power supply providing 1 A ±0.002 A DC; voltmeter capable of ±0.01 mV resolution.
- Oven for drying (110 °C to 120 °C depending on procedure).
Sample preparation:
- Follow ISO 6375 for sampling.
- For calcined petroleum coke: dry at 110 °C ±5 °C for 12 h, de-oil via solvent extraction (ISO 8723) or heating (ISO 6997), crush and sieve to obtain 1.4 mm to 1.0 mm fraction.
- General preparation: divide by sieving into fractions (>1.0 mm, 0.5–1.0 mm,

ISO 10143:2019 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

Related standards

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