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1、Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 23:49:32 MDTNo reproduction or networking permitted without license from IHS -,-,- J IS JAPANESE I N DU STR I AL STANDARD Translated and Publ
2、ished by Japanese Standards Association Iron ores-Sampling and sample preparation proced Ures ICs 73.060.10 Reference number : JIS M 8702 : 2002 (E) PROTECTED BY COPYRIGHT 37 s Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing
3、, Bernie Not for Resale, 03/11/2007 23:49:32 MDTNo reproduction or networking permitted without license from IHS -,-,- M 8702 : 2002 Foreword This translation has been made based on the original Japanese Industrial Standard revised by the Minister of Economy, Trade and Industry through deliberations
4、 at the Japanese Industrial Standards Committee, as the result of proposal for revision of Japanese Industrial Standard submitted by The Japan Iron and Steel Federation (JISF) with the draft being attached, based on the provision of Article 12 Clause 1 of the Industrial Standardization Law applicabl
5、e to the case of revision by the provision of Article 14. Consequently JIS M 8702 : 1996 is revised, also JIS M 8701 : 1996 and JIS M 8703 : 1996 are withdrawn and replaced with JIS M 8702 : 2002. This revision has been made based on IS0 3082 : 2000 Iron ores-Sampling and sample preparation procedur
6、es for the purposes of making easy to compare this Standard with International Standards; to prepare Japanese Industrial Standard conforming with International Standards; and to propose a draft of International Standard which is based on Japanese Industrial Standard. Date of Establishment: 1985-03-0
7、1 Date of Revision: 2002-03-20 Date of Public Notice in Official Gazette: 2002-03-20 Investigated by: Japanese Industrial Standards Committee Standards Board Technical Committee on Iron and Steel JIS M 8702 : 2002, First English edition published in 2002-12 Translated and published by: Japanese Stan
8、dards Association 4-1-24, Akasaka, Minato-ku, Tokyo, 107-8440 JAPAN In the event of any doubts arising as to the contents, the original JIS is to be the final authority. O JSA 2002 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
9、or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. Printed in Japan PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bern
10、ie Not for Resale, 03/11/2007 23:49:32 MDTNo reproduction or networking permitted without license from IHS -,-,- M 8702 : 2002 Contents Introduction . 1 2 3 4 4.1 4.2 4.3 5 5.1 Scope Normative references Terms and definitions . General considerations for sampling and sample preparation . Basic requi
11、rements Establishing a sampling scheme . System verification Fundamentals of sampling and sample preparation Minimization of bias . 5.1.1 5.1.2 5.1.3 5.1.4 5.2 5.3 5.4 5.4.1 5.4.2 5.5 5.5.1 5.5.2 5.5.3 5.5.4 General Minimization of particle size degradation Extraction of increments Increment mass Ov
12、erall precision Quality variation . Sampling precision and number of primary increments Mass basis sampling . Time basis sampling . Precision of sample preparation and overall precision . Preparation and measurement of gross sample . Preparation and measurement of partial samples General Preparation
13、 and measurement of each increment . 6 Methods of sampling . 6.1 Mass basis sampling . 6.1.1 Mass of increment . 1 1 1 2 3 3 4 5 5 5 5 5 6 6 7 9 10 10 11 11 11 12 12 12 13 13 13 PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employe
14、es/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 23:49:32 MDTNo reproduction or networking permitted without license from IHS -,-,- M 8702 : 2002 6.1.2 Quality variation . 6.1.3 6.1.4 Sampling interval 6.1.5 Methods of taking increments . 6.2 Time basis sampling . 6.2.1 Mass of increment
15、. Number of primary increments . 6.2.2 Quality variation . 6.2.4 Sampling interval Stratified random sampling within fixed mass or time intervals 6.2.3 Number of increments 6.2.5 6.3 6.3.1 General 6.3.2 Fixed mass intervals . 6.3.3 Fixed time intervals Methods of taking increments . 7 Sampling from
16、moving streams 7.1 7.2 7.3 7.4 7.5 7.5.1 7.5.2 7.5.3 7.5.4 7.5.5 7.6 7.7 7.7.1 7.7.2 7.7.3 7.7.4 General Safety of operations Robustness of sampling installation Versatility of sampling system . Primary samplers Location . Types of primary sampler General design criteria for primary cutters . Cutter
17、 aperture of primary sampler Cutter speed of primary sampler Secondary and subsequent samplers . On-line sample preparation . Arrangement for sample preparation . Crushers Dividers . Dryers 13 13 13 14 14 14 14 15 15 15 15 15 16 16 16 16 16 17 17 17 17 18 19 20 20 21 21 21 22 22 24 (ii PROTECTED BY
18、COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 23:49:32 MDTNo reproduction or networking permitted without license from IHS -,-,- M 8702 : 2002 7.8 Checking precision and bias 25
19、 7.9 Cleaning and maintenance 25 7.10 Example of a flowsheet . 25 8 Sampling from stationary situations . 27 8.1 General 27 8.2 Sampling from wagons . 27 8.2.1 General 27 8.2.2 Sampling devices 27 8.2.3 Number of primary increments . 27 8.2.4 Method of sampling 28 8.3 Sampling from ships, stockpiles
20、 and bunkers 28 9 Stopped-belt reference sampling . 28 10 Sample preparation . 10.1 Fundamentals . 10.1.1 General 10.1.2 Drying 10.1.3 Crushing and grinding 10.1.4 Mixing 10.1.5 Sample division Split use and multiple use of sample 10.1.6 10.2 Method of constituting partial samples or a gross sample
21、10.2.1 General 10.2.2 Method of constitution for mass basis sampling . 10.2.3 Method of constitution for time basis sampling 10.2.4 Special procedure for moisture content . 10.3 Mechanical methods of division 10.3.1 Mechanical increment division 10.3.2 Other mechanical division methods . 10.4 Manual
22、 methods of division . 10.4.1 General 29 29 29 30 30 31 31 32 32 32 32 32 33 33 33 35 37 37 (iii) PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 23:49:32 MDTNo repro
23、duction or networking permitted without license from IHS -,-,- M 8702 : 2002 10.4.2 Manual increment division 10.4.3 Manual riffle division method . 10.5 10.6 10.7 10.7.1 Mass and particle size 10.7.2 Preparation to -250 pm Preparation of sample for size determination Preparation of sample for moist
24、ure determination . Preparation of test sample for chemical analysis . 10.7.3 Final preparation . 10.7.4 Grinding to -100 pm or -160 C L r n 10.7.5 Distribution of samples for chemical analysis . 10.8 Example of sample preparation process 37 40 42 42 43 43 44 45 45 46 46 11 Packing and marking of sa
25、mple . 46 12 Determination of average quality of characteristics of lot 46 12.1 Chemical component . 46 12.2 Particle size 47 12.3 Moisture content 47 12.4 Number of digits for indication . 47 Annex A (informative) Checklist for mechanical sampling systems 49 Annex B (normative) Equation for number
26、of increments 53 Annex C (informative) Alternative method of taking the reference sample 55 Annex D (normative) Procedure for determining the minimum mass of divided gross sample for size determination using other mechanical division methods . 59 Annex E (normative) Riffle dividers . 62 Annex 1 (inf
27、ormative) Comparison table between JIS and corresponding International Standard . 64 (iv) PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 23:49:32 MDTNo reproduction
28、or networking permitted without license from IHS -,-,- JAPANESE INDUSTRIAL STANDARD JIS M 8702 : 2002 Iron ores-Sampling and sample preparation procedures Introduction This Japanese Industrial Standard has been prepared based on the third edition of IS0 3082 Iron ores-Sampling and sample preparation
29、 procedures published in 2000 with modifying the technical contents. Portions underlined with dots are the matters not stated in the original Interna- tional Standard. 1 Scope This Standard gives a) the underlying theory, b) the basic principles for sampling and preparation of samples, c) the basic
30、requirements for the design, installation and operation of sampling systems for mechanical sampling, manual sampling and preparation of samples taken from a lot under transfer to determine the chemical composition, moisture content and size distribution of the lot. Sampling and sample preparation pr
31、ocedures for physical testing are specified in IS0 10836. The methods specified in this Standard are applicable to both the loading and unloading of a lot by means of belt conveyors and other ore handling equipment to which a mechanical sampler may be installed or where manual sampling may safely be
32、 conducted. The methods are applicable to all iron ores, whether natural or processed (e.g. concentrates and agglomerates, such as pellets or sinters). WARNING - This Standard may involve hazardous materials, operations and equipment, and does not purport to address all of the safety issues associ-
33、ated with its use. It is the responsibility of the user of this Standard to establish appropriate health and safety practices and determine the appli- cability of regulatory limitations prior to use. Remarks : The International Standard corresponding to this Standard is as fol- lows. In addition, sy
34、mbols which denote the degree of correspondence in the contents between the relevant International Standard and JIS are IDT (identical), MOD (modified), and NEQ (not equivalent) ac- cording to ISO/IEC Guide 21. IS0 3082 : 2000 Iron ores-Sampling and sample preparation pro- cedures (MOD) 2 Normative
35、references The following standards contain provisions which, through reference in this Standard, constitute provisions of this Standard. The most recent editions of the standards (including amendments) indicated below shall be applied. PROTECTED BY COPYRIGHT Copyright Japanese Standards Association
36、Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 23:49:32 MDTNo reproduction or networking permitted without license from IHS -,-,- 2 M 8702 : 2002 JIS M 8705 Iron ores-Determination of moisture content of a consignment NOTE JIS M
37、8706 Iron ores-Determination of size distribution by sieving NOTE IS0 4701 Iron ores-Determination of size distribution by sieving is equivalent to the said standard. IS0 565 Test sieves-Metal wire cloth, perforated metal plate and electroformed sheet-Nominal sized openings IS0 10836 Iron ores-Sampl
38、ing and sample preparation for physical testing IS0 11323 Iron ores-Vocabulary IS0 3087 Iron ores-Determination of moisture content of a lot is equiva- lent to the said standard. 3 Terms and definitions For the purposes of this Standard, the terms and defi- nitions contained in IS0 11323 as well as
39、those given below apply. 3.1 lot Discrete and defined quantity of ore for which quality characteristics are to be assessed 3.2 vice increment quantity of ore collected in a single operation of a sampling de- 3.3 sentative in respect of the quality characteristics to be assessed sample relatively sma
40、ll quantity of ore, so taken from a lot as to be repre- 3.4 partial sample crements needed for a gross sample sample, consisting of less than the complete number of in- 3.5 gross sample sample, comprising all increments, entirely representative of all quality characteristics of a lot 3.6 test sample
41、 sample, prepared to meet all specific conditions for a test 3.7 test portion part of a test sample that is actually and entirely subjected to the specific test 3.8 stratified sampling sampling of a lot carried out by taking increments from systematically specified positions and in appropriate propo
42、rtions from identified parts called strata Examples of strata, based on time, mass or space, include production periods (e.g. 5 min), production masses (e.g. 1 O00 t), holds in vessels, wagons in a train or containers. NOTE PROTECTED BY COPYRIGHT Copyright Japanese Standards Association Provided by
43、IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/11/2007 23:49:32 MDTNo reproduction or networking permitted without license from IHS -,-,- 3 M 8702 : 2002 3.9 systematic sampling selection of increments at regular intervals from a lot 3.10 mass basis
44、 sampling sampling carried out so that increments are taken at equal mass intervals, increments being as near as possible of uniform mass 3.11 time basis sampling sampling carried out so that increments are taken from free falling streams, or from conveyors, at uniform time intervals? the mass of ea
45、ch increment being proportional to the mass flow rate at the instant of taking the in- crement 3.12 proportional sample division division of samples or increments such that the mass of each retained divided portion is a fixed proportion of the mass being divided 3.13 constant mass division division
46、of samples or increments such that the re- tained divided portions are of almost uniform mass, irrespective of variations in mass of the samples or increments being divided This method is required for sampling on a mass basis. “Almost uni- form” means that variations in mass are less than 20 % in te
47、rms of the coefficient of variation. NOTE 3.14 split use of sample separate use of parts of a sample, as test samples for separate determinations of quality characteristics 3.15 multiple use of sample use of a sample in its entirety for the determina- tion of one quality characteristic, followed by
48、the use of the same sample in its en- tirety for the determination of one or more other quality characteristics 3.16 nominal top size smallest aperture size, within the range of the R20 Series (in IS0 565 : 1990, square opening), such that no more than 5 % by mass of an ore is retained on the sieve 4 General considerations for sampling and sample preparation 4.1 Basic requirements The basic requirement for a correct sampling scheme is that all parts of the ore in