ISO 12989-1:2000 アルミニウムの製造に使用される炭素質材料—焼き付けされたアノードとサイドウォールブロック—空気に対する反応性の決定—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 12989 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.

International Standard ISO 12989-1 was prepared by Technical Committee ISO/TC 47, Chemistry, Subcommittee SC 7, Aluminium, cryolite, aluminium fluoride, sodium fluoride, carbonaceous products for the aluminium industry.

ISO 12989 consists of the following parts, under the general title Carbonaceous materials used in the production of aluminium — Baked anodes and sidewall blocks — Determination of the reactivity to air:

• Part 1: Loss in mass method

The thermogravimetric method will be the subject of a future part 2 to ISO 12989.

Introduction

The combustion of carbonaceous materials in air leads to undesirable losses that should be minimized in many industrial processes.

The loss of carbonaceous anode material from burning with air is of importance in predicting the behaviour of the anodes during the aluminium reduction process.

1 Scope

This part of ISO 12989 specifies a loss-in-mass method for the determination of the reactivity of carbonaceous products to air. The method was developed especially for anodes used in the production of aluminium.

2 Normative references

The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO 12989. 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 12989 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.