BS-6043-4.10-1991.pdf
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1、BRITISH STANDARD BS 6043-4.10: 1991 Methods of sampling and test for Carbonaceous materials used in aluminium manufacture Part 4: Cold ramming pastes Section 4.10 Determination of the apparent porosity of baked rammed paste NOTEIt is recommended that this Section be read in conjunction with the gene
2、ral information in BS 6043-4.0, published separately. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:36:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6043-4.10:1991 This British Standard, having been prepared under the direction of the Chemicals Standards Policy Committee, was publishe
3、d under the authority of the Standards Board and comes into effect on 30 September 1991 BSI 10-1999 The following BSI references relate to the work on this standard: Committee reference CIC/24 Draft for comment 90/54850 DC ISBN 0 580 19935 5 Committees responsible for this British Standard The prepa
4、ration of this British Standard was entrusted by the Chemicals Standards Policy Committee (CIC/-) to Technical Committee CIC/24, upon which the following bodies were represented: Aluminium Federation British Ceramic Research Ltd. Chemical Industries Association Institute of Petroleum Refractories As
5、sociation of Great Britain Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:36:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6043-4.10:1991 BSI 10-1999i Contents Page Committees responsibleInside front cover Forewordii 1Scope1 2Pri
6、nciple1 3Reagent1 4Apparatus1 5Materials1 6Sampling1 7Preparation of test samples1 8Procedure1 9Calculation and expression of results1 10Test report2 Publication(s) referred toInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:36:19 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
7、 BS 6043-4.10:1991 ii BSI 10-1999 Foreword This Section of BS 6043 has been prepared under the direction of the Chemicals Standards Policy Committee to provide a method of test for cold ramming pastes used in the production of aluminium. There is no corresponding International Standard; however, it
8、is intended, upon publication of this Section of BS 6043, that it be offered to the International Organization for Standardization (ISO) for possible adoption as an International Standard. It is essential that BS 6043-2.6, BS 6043-4.1, BS 6043-4.6 and BS 6043-4.7 be read in conjunction with this Sec
9、tion of BS 6043. This standard describes a method of test only, and should not be used or quoted as a specification defining the characteristics of a product. Reference to this Section should indicate that the method of test used complies with BS 6043-4.10:1991. A British Standard does not purport t
10、o include all the necessary 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,
11、 pages i and ii, pages 1 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. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:36:1
12、9 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6043-4.10:1991 BSI 10-19991 1 Scope This Section of BS 6043 describes a method for the determination of the apparent porosity of baked rammed cold ramming paste used in aluminium manufacture. NOTEThe titles of the publications referred to in this stand
13、ard are listed on the inside back cover. 2 Principle A baked test piece is produced from a test sample of cold ramming paste by ramming under regulated conditions followed by baking according to a defined programme. The test piece is weighed and measured and its apparent density is calculated. The t
14、est piece is crushed and ground to a fine powder and the density of the powder in xylene is measured. The apparent porosity of the test piece is calculated from its apparent density and the density of the powder in xylene. 3 Reagent WARNING. Refer to the reagent suppliers health and safety data shee
15、ts for the precautions which are to be observed for the safe use of xylene. 3.1 Xylene, general purpose reagent grade, of density approximately 0.860 g/mL. 4 Apparatus 4.1 Ordinary laboratory apparatus 4.2 Ramming apparatus, and the other apparatus described in clause 4 of BS 6043-4.7:1991. 4.3 Pykn
16、ometer, and the other apparatus described in clause 5 of BS 6043-2.6:1986. 4.4 Jaw crusher, or other crushing device, capable of crushing the baked test piece to approximately 6 mm or smaller particle size without introducing contamination, e.g. by abrasion of the facing of the jaws. 5 Materials Use
17、 the materials described in clause 5 of BS 6043-4.7:1991. 6 Sampling Prepare a representative laboratory sample of cold ramming paste in accordance with BS 6043-4.1. 7 Preparation of test samples Prepare three groups of test samples, each comprising at least three test samples from the laboratory sa
18、mple (see clause 6) by the method described in 7.1 and 7.2 of BS 6043-4.7:1991. 8 Procedure 8.1 Preparation of baked test pieces Prepare three groups, each comprising three rammed test pieces 50 mm in diameter and 50 2 mm in height, from the test samples (see clause 6) by the procedure described in
19、8.1 of BS 6043-4.7:1991 using the ramming apparatus. If the cold ramming paste requires pre-curing before being baked, pre-cure the test pieces in accordance with 8.3 of BS 6043-4.7:1991. Bake the rammed test pieces by the procedure described in 8.4 of BS 6043-4.7:1991. Weigh and measure the test pi
20、eces and calculate their apparent density in accordance with 9.1 of BS 6043-4.7:1991. NOTEIf test pieces produced in accordance with BS 6043-4.7 have already been used for the determination of the cold crushing strength by the method described in BS 6043-4.9, material recovered from that determinati
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