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1、BRITISH STANDARD BS 6147:1989 ISO 3852:1988 Methods for Determination of bulk density of iron ores UDC 553.31 + 622.341.1:531.755.22 Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6147:1989 This British Standard, having been prepared und
2、er the direction of the Iron and Steel Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 31 August 1989 BSI 11-1999 First published as BS 6147-1 and BS 6147-2 August 1981 First revision as BS 6147 The following BSI references relate to the wor
3、k on this standard: Committee reference ISM/58 Draft for comment 89/40778 DC ISBN 0 580 17536 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Iron and Steel Standards Policy Committee (ISM/-) to Technical Committee ISM/58, upon which t
4、he following bodies were represented: British Steel Industry Institution of Mining and Metallurgy Coopted members Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6147:1989
5、BSI 11-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Normative references1 3Definitions1 4Apparatus1 5Sample1 6Procedure2 7Expression of results2 8Test report3 Table Repeatability of the test2 Publications referred toInside back cover Licensed Copy: sheffi
6、eldun sheffieldun, na, Wed Dec 06 14:54:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6147:1989 ii BSI 11-1999 National foreword This British Standard has been prepared under the direction of the Iron and Steel Standards Policy Committee and is identical with ISO 3852:1988 “Iron ores Determinatio
7、n of bulk density”, published by the International Organization for Standardization (ISO). This British Standard replaces BS 6147-1 and BS 6147-2:1981, which are now withdrawn. The method contained in BS 6147-1:1981 is included in this British Standard. The method contained in BS 6147-2:1981, which
8、was applicable to samples having a maximum particle size greater than 40 mm, has been replaced in this revision by a method applicable to ores having any maximum particle size. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are r
9、esponsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International StandardCorresponding British Standard ISO 3081:1986 BS 5660 Methods of sampling iron ores Part 1:1987 Manual method of increment sam
10、pling (Identical) ISO 3082:1987Part 2:1987 Mechanical method of increment sampling and sample preparation (Identical) ISO 3083:1986BS 5661:1987 Method for preparation of samples of iron ores by manual means (Identical) ISO 3087:1987 BS 5663 Methods of testing iron ores Part 1:1987 Determination of m
11、oisture content (Identical) ISO 4701:1985Part 2:1987 Determination of size distribution by sieving (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 4, an inside back cover and a back cover. This standard has been updated (see copyr
12、ight 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 14:54:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6147:1989 BSI 11-19991 1 Scope This International Standard speci
13、fies two methods for measuring the bulk density of natural and processed iron ores. Method 1 is applicable to iron ores having a maximum particle size of 40 mm or smaller. Method 2 is applicable to iron ores having any maximum particle size. NOTEThe measured bulk density does not necessarily represe
14、nt the bulk density of compacted or piled-up natural and processed iron ores. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid.
15、All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards
16、. ISO 3081:1986, Iron ores Increment sampling Manual method. ISO 3082:1987, Iron ores Increment sampling and sample preparation Mechanical method. ISO 3083:1986, Iron ores Preparation of samples Manual method. ISO 3087:1987, Iron ores Determination of moisture content of a consignment. ISO 4701:1985
17、, Iron ores Determination of size distribution by sieving. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 maximum particle size the particle size expressed in terms of the aperture of the sieve on which approximately 5 % (m/m) of an iron ore is re
18、tained 3.2 bulk density the mass in air of a unit volume of an iron ore, including the voids within and between the particles 4 Apparatus 4.1 Method 1 4.1.1 Small container, made of metal, cylindrical in form, and having an internal diameter of 400 mm 2 mm and an internal height of 400 mm 2 mm (inne
19、r volume: approximately 0,05 m3). The container shall be constructed of metal of sufficient thickness to ensure the rigidity of the walls and the base of the container under the conditions of the test. The container shall be reinforced by a steel band around the outside periphery at the top, and sha
20、ll have two handles, 180 apart, attached to the outer surface by welding. A carriage or other suitable device may be provided to facilitate transportation of the container within the laboratory. The volume of the container, V, in litres, shall be determined with a precision of 0,1 litre using potabl
21、e water of known density. 4.1.2 Weighing device, having a sensitivity of 1/1 000 or better, and a capacity adequate for the masses to be determined. 4.1.3 Drying oven, suitably ventilated, capable of being controlled at 105 C 5 C and of sufficient size to accommodate the test sample. 4.1.4 Increment
22、 shovel, No. 50, as specified in Table 6 of ISO 3081. 4.2 Method 2 4.2.1 Container(s), such as a truck or railway wagon, of regular geometrical shape, with smooth inner surfaces of the walls and bottom, and in good general condition. The container shall have sufficient capacity to hold, when filled,
23、 a minimum of 10 tonnes of sample and a minimum height of the sample bed of 500 mm. The minimum length, width and height of the containers should be 10 times the maximum particle size of the sample. 4.2.2 Weighing device, preferably of the platform type, having a sensitivity of 1/200 or better and a
24、 capacity adequate for the masses to be determined. 5 Sample The sample shall be representative of the ore and should be taken and prepared in accordance with the procedure agreed upon between the parties concerned. NOTEPrinciples of ISO 3081, ISO 3082, and/or ISO 3083 should be respected in taking
25、and preparing samples according to the purposes of the test. The quantity of sample should be sufficient to fill the container three times, with a small overflow, and to provide for the determination of size distribution and moisture content, the two main factors which affect bulk density. In the ca
26、se of Method 2 the sample shall have a minimum mass of 35 tonnes, the recommended mass being 50 tonnes. NOTEA sample of mass 35 tonnes has a volume of approximately 14 m3 to 23,6 m3, according to the material. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:30 GMT+00:00 2006, Uncontroll
27、ed Copy, (c) BSI BS 6147:1989 2 BSI 11-1999 6 Procedure Carry out the test in duplicate in both methods. Simultaneously with the test, the moisture content and the size distribution should be determined in accordance with the procedure specified in ISO 3087 and ISO 4701, respectively. 6.1 Method 1 T
28、he test may be carried out using an as received, air-dried, or oven-dried sample. If the test is made on an oven-dried basis, dry the sample at 105 C 5 C to constant mass. 6.1.1 Weigh the dried container (4.1.1) and record the mass, m0, to the nearest 0,2 kg. 6.1.2 Fill the container with the sample
29、 of as received, air-dried or oven-dried material, using the shovel (4.1.4). Empty the shovel from a height not exceeding 50 mm above the surface of the material in the container. Fill the container carefully, in order to prevent evident segregation. After filling the container to overflowing, draw
30、a straight-edge across the top of the container to make the heaped surface level. 6.1.3 Transfer the filled container to the weighing device (4.1.2) without loss of sample from the container. Weigh the filled container and record the mass, m1, to the nearest 0,2 kg. 6.1.4 Repeat the test on a furthe
31、r charge of material or by recharging the same material, using the same container. 6.2 Method 2 6.2.1 Measure the length, width and height of the container (4.2.1) with a precision of 0,5 % and then calculate and record its volume, V. Weigh the empty container and record the mass, m0. 6.2.2 With the
32、 container on a level surface, discharge the sample into it manually or by mechanical means, taking care to avoid breakage or segregation of particles. Level off the upper surface across the top of the container, verifying by visual inspection and removing or pushing down any particles which would a
33、ppear to obstruct the passage of a straight-edge if it were pulled across the top of the container. 6.2.3 Weigh the filled container and record the mass, m1. 6.2.4 Repeat the test using the same or a second container of similar capacity, which also has been determined according to 6.2.1. 7 Expressio
34、n of results 7.1 Calculation The bulk density, ap, expressed in kilograms per cubic metre, is given by the equation where Round off the result to four significant figures.1) NOTEThe SI unit for density is kg/m3. However the use of units outside the SI which are accepted by the CIPM will be practical
35、 under certain circumstances. If the unit tonne/m3 is used, the result of the test should be expressed to two decimal places. 1 000 kg/m3 = 1 tonne/m3 = 1 kg/l 7.2 Repeatability and acceptance of test results The difference between the results of duplicate tests shall not differ by more than the val
36、ue given in the Table. Table Repeatability of the test If the difference between the results of duplicate tests does not exceed the repeatability given in the Table, the mean value shall be reported. If the difference between the results of duplicate tests exceeds the repeatability, a single third t
37、est shall be carried out. If any two results of the three tests comply with the repeatability, the respective two results together with their mean value shall be reported. If any two results do not comply, all three results together with their mean value shall be reported. m0is the mass, in kilogram
38、s, of the empty container; m1is the mass, in kilograms, of the container plus sample; Vis the volume, in cubic metres, of the container. 1) Annex B (Guide for the rounding of numbers) to ISO 31-0:1981, should be applied. MethodRepeatability 15 % relative to the mean value 2100 kg/m3 ap m1m0 V - -= L
39、icensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6147:1989 BSI 11-19993 8 Test report The test report shall include the following information: a) reference to this International Standard; b) details necessary for the identification of the s
40、ample, including statement of the condition of the sample; i.e. as received, air-dried or oven-dried; c) date and method of calibration of the container; d) statement of the capacity and sensitivity of the weighing device; e) result of the test and the accepted measured values (together with the qua
41、lification “as received”, “air-dried”, or “oven-dried”); f) any quality characteristics of the sample which may have had an influence on the result, i.e.: moisture content; size distribution; total iron content, if available; geological type. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14
42、:54:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 blank Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:30 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6147:1989 BSI 11-1999 Publications referred to See national foreword Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:30
43、 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6147:1989 ISO 3852:1988 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international
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