ISO 9055:1988 PDF

Carbonaceous materials for the production of aluminium — Pitch for electrodes — Determination of sulfur content by the bomb method

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Title (English):

ISO 9055:1988

Carbonaceous materials for the production of aluminium — Pitch for electrodes — Determination of sulfur content by the bomb method

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 4
Publication date:: December 15, 1988
Edition:: ISO IS 9055 edition 1 version 1
ICS:: 71.100.10

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Description (English):

A sample is oxidized by combustion in a bomb containing oxygen under pressure. The sulphur is gravimetrically determined in the bomb washings in the form of barium sulfate. The method is applicable to pitches of both coal ta and petroleum origin, provided that they contain at least 0,1 % (m/m) sulfur.

Technical details

Technical committee: ISO/TC 226 - Materials for the production of primary aluminium
SKU: ISO 9055:1988

Abstract

Overview

ISO 9055:1988 specifies a laboratory method for determining sulfur in pitch for electrodes (carbonaceous materials used in aluminium production) using the bomb combustion (general bomb) method. A weighed sample is oxidized by combustion in an oxygen‑pressurized bomb; the sulphur oxidizes to sulfate, which is recovered from the bomb washings and gravimetrically determined as barium sulfate (BaSO4). The method is applicable to coal‑tar and petroleum‑derived pitches containing at least 0.1% (m/m) sulfur.

Key topics and technical requirements

Scope and applicability: Pitches for electrodes used in aluminium production with ≥0.1% S.
Principle: Combustion in an oxygen bomb; precipitation of sulfate as BaSO4; gravimetric weighing and conversion to %S using a conversion factor (0.1373).
Sampling and sample preparation: Follow ISO 6257 for sampling. Grind hard samples to

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and technical requirements

Scope and applicability: Pitches for electrodes used in aluminium production with ≥0.1% S.
Principle: Combustion in an oxygen bomb; precipitation of sulfate as BaSO4; gravimetric weighing and conversion to %S using a conversion factor (0.1373).
Sampling and sample preparation: Follow ISO 6257 for sampling. Grind hard samples to

ISO 9055:1988 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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