ISO 12981-1:2000 アルミニウムの製造に使用される炭素質材料—煆焼コークス—二酸化炭素に対する反応性の測定—パート1：質量損失法 | ページ 2

Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.

Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this part of ISO 12981 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

International Standard ISO 12981-1 was prepared by Technical Committee ISO/TC 47, Chemistry, Subcommittee SC 7, Aluminium oxide, cryolite, aluminium fluoride, sodium fluoride, carbonaceous products for the aluminium industry.

ISO 12981 consists of the following parts, under the general title Carbonaceous materials used in the production of aluminium — Calcined coke — Determination of the reactivity to carbon dioxide:

• Part 1: Loss in mass method
• Part 2: Thermogravimetric method

Introduction

The reactivity of a calcined coke to carbon dioxide is assessed by determining the loss in mass of a sample exposed in accordance with the following chemical reaction:

C + CO₂ → 2 CO

This determination allows an assessment of the later anode reactivity to carbon dioxide in the electrolysis cell.

1 Scope

This part of ISO 12981 specifies a method for the determination, by a loss in mass method, of the reactivity of calcined petroleum coke, used in the manufacture of anodes for the production of aluminium, to carbon dioxide.

2 Normative references

The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO 12981. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of ISO 12981 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.