ISO 20292:2009 PDF

Materials for the production of primary aluminium — Dense refractory bricks — Determination of cryolite resistance

Title (English):

ISO 20292:2009

Materials for the production of primary aluminium — Dense refractory bricks — Determination of cryolite resistance

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 7
Publication date:: April 29, 2009
Edition:: ISO IS 20292 edition 1 version 1
ICS:: 71.060.50

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Description (English):

ISO 20292:2009 covers materials for the production of primary aluminium. ISO 20292:2009 specifies a method for the determination of the resistance of dense refractory bricks to cryolite melt with excess sodium fluoride.

Technical details

Technical committee: ISO/TC 226 - Materials for the production of primary aluminium
SKU: ISO 20292:2009

Abstract

Overview

ISO 20292:2009 specifies a standardized laboratory method to assess the cryolite resistance of dense refractory bricks used in the production of primary aluminium. The test evaluates how refractory brick materials resist attack and infiltration by a molten cryolite mixture (cryolite with excess sodium fluoride) under controlled high-temperature conditions that simulate electrolyte exposure in aluminium electrolysis cells.

Keywords: ISO 20292:2009, cryolite resistance, dense refractory bricks, primary aluminium, refractory testing

Key topics and technical requirements

Scope and principle
- Measures resistance of dense refractory bricks to a molten cryolite/NaF mixture at 950 °C for 24 h in air.
- Reaction and infiltration areas are quantified and described visually (photocopies/photographs).
Sample preparation
- Minimum two bricks from the batch; test pieces taken from different bricks.
- Test crucible: bore of (57 ± 1) mm diameter and (40 ± 1) mm depth in a ~110 × 110 × 65 mm brick piece; lids ~10 mm thick.
Test mixture and loading
- Powder mix: 60% cryolite (Na3AlF6, ≥97% purity) and 40% sodium fluoride (NaF, ≥99% purity), particle size

Related standards

Other ISO standards

Overview

Keywords: ISO 20292:2009, cryolite resistance, dense refractory bricks, primary aluminium, refractory testing

Key topics and technical requirements

Scope and principle
- Measures resistance of dense refractory bricks to a molten cryolite/NaF mixture at 950 °C for 24 h in air.
- Reaction and infiltration areas are quantified and described visually (photocopies/photographs).
Sample preparation
- Minimum two bricks from the batch; test pieces taken from different bricks.
- Test crucible: bore of (57 ± 1) mm diameter and (40 ± 1) mm depth in a ~110 × 110 × 65 mm brick piece; lids ~10 mm thick.
Test mixture and loading
- Powder mix: 60% cryolite (Na3AlF6, ≥97% purity) and 40% sodium fluoride (NaF, ≥99% purity), particle size

ISO 20292:2009 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

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