BS-6870-2.1-1987 ISO-8558-1985.pdf
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1、BRITISH STANDARD BS 6870-2.1: 1987 ISO 8558:1985 Analysis of aluminium ores Part 2: Chemical methods Section 2.1 Method of preparation of pre-dried test samples ISO title: Aluminium ores Preparation of pre-dried test samples UDC 553.492:543 Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:4
2、8:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6870-2.1:1987 This British Standard, having been prepared under the direction of the Non-ferrous Metals Standards Committee, was published under the authority of the Board of BSI and comes into effect on 28 August 1987 BSI 01-2000 The following BSI
3、references relate to the work on this standard: Committee reference NFM/31 Draft for comment 84/41558 DC ISBN 0 580 16053 X National foreword This Section of BS 6870 has been prepared under the direction of the Non-ferrous Metals Standards Committee. It is identical with ISO 8558:1985 “Aluminium ore
4、s Preparation of pre-dried test samples”, published by the International Organization for Standardization (ISO). Terminology and conventions. The text of the International Standard has been approved as suitable for publication as a British Standard without deviation. Some terminology and certain con
5、ventions are not identical with those used in British Standards; attention is drawn especially to the following. Wherever the words “International Standard” appear, referring to this standard, they should be read as “Section of BS 6870”. A British Standard does not purport to include all the necessa
6、ry provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1
7、and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Cross-reference International StandardCorresponding British Standard ISO 8557:1985BS 68
8、70 Analysis of aluminium ores Section 2.2:1987 Method for determination of hygroscopic moisture in analytical samples: gravimetric method (Identical) Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:48:35 GMT+00:00 2006, Unco
9、ntrolled Copy, (c) BSI BS 6870-2.1:1987 BSI 01-2000i Contents Page National forewordInside front cover 1Scope and field of application1 2Reference1 3Principle1 4Apparatus1 5Sampling and samples1 6Procedure1 Publication referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Dec
10、06 14:48:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:48:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6870-2.1:1987 BSI 01-20001 1 Scope and field of application This International Standard specifies a method for the preparation
11、 of pre-dried test samples which are to be used for the determination of analytical values of constituents in aluminium ores on a dry basis. When the analytical constituent to be calculated on a dry sample basis is aluminium or for determination of loss of mass at 1 075 C, ISO 8557 shall be used. 2
12、Reference ISO 8557, Aluminium ores Determination of hygroscopic moisture in analytical samples Gravimetric method. 3 Principle Drying of a test sample to constant mass at a temperature of 105 C. 4 Apparatus Ordinary laboratory apparatus and 4.1 Weighing bottle, low form. 4.2 Laboratory oven, capable
13、 of being controlled at 105 2 C. 4.3 Desiccator, containing either actived alumina, fresh magnesium perchlorate or diphosphorus pentoxide as desiccant. NOTEActivated alumina should be freshly activated by heating at 300 10 C overnight. 5 Sampling and samples A laboratory sample with a particle size
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