BS ISO 13543-2016 Copper lead zinc and nickel sulfide concentrates Determination of mass of contained metal in a lot《硫化铜、铅、锌和镍精矿 批量测定所含金属的质量》.pdf

1、BS ISO 13543:2016Copper, lead, zinc and nickelsulfide concentrates Determination of mass ofcontained metal in a lotBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS ISO 13543:2016 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO

2、 13543:2016.The UK participation in its preparation was entrusted to TechnicalCommittee NFE/36, Copper lead and zinc ores and concentrates.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessarypr

3、ovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 81812 7ICS 73.060.99Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was publish

4、ed under the authority of theStandards Policy and Strategy Committee on 30 June 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 13543:2016 ISO 2016Copper, lead, zinc and nickel sulfide concentrates Determination of mass of contained metal in a lotConcentrs sulfu

5、rs de cuivre, de plomb, de zinc et de nickel Dtermination de la masse de mtal contenu dans un lotINTERNATIONAL STANDARDISO13543Second edition2016-06-01Reference numberISO 13543:2016(E)BS ISO 13543:2016ISO 13543:2016(E)ii ISO 2016 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2016, Published in

6、 SwitzerlandAll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can

7、be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 13543:2016ISO 13543:2016(E)Foreword iv1 S

8、cope . 12 Normative references 13 Terms and definitions . 14 Determination of mass of contained metal . 24.1 General . 24.2 Wet mass of the lot 24.3 Metal content of the lot 24.4 Dry mass of the lot . 24.5 Mass of contained metal . 24.5.1 Major elements 24.5.2 Precious metals . 35 Determination of v

9、ariance of mass of contained metal . 36 Examples of calculation of contained metal and its variance 46.1 Static scale . 46.1.1 General 46.1.2 Mass of contained copper 46.1.3 Mass of contained gold . 56.2 Draft survey . 6Bibliography 8 ISO 2016 All rights reserved iiiContents PageBS ISO 13543:2016ISO

10、 13543:2016(E)ForewordISO (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

11、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) o

12、n all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted

13、. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying an

14、y or all such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of us

15、ers and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplement

16、ary information.The committee responsible for this document is ISO/TC 183, Copper, lead, zinc and nickel ores and concentrates.This second edition cancels and replaces the first edition (ISO 13543:1996), which has been technically revised.iv ISO 2016 All rights reservedBS ISO 13543:2016INTERNATIONAL

17、 STANDARD ISO 13543:2016(E)Copper, lead, zinc and nickel sulfide concentrates Determination of mass of contained metal in a lotWARNING This International Standard may involve hazardous materials, operations and equipment. It is responsibility of the user of this International Standard to establish a

18、ppropriate health and safety practices and determine the applicability of regulatory limitations prior to use.1 ScopeThis International Standard specifies the method for determining the mass of contained metal in a lot, based on the wet mass, moisture content and dry basis metal content of the lot.

19、The procedure for estimating the variance and confidence intervals for the mass of contained metal is also specified.2 Normative referencesThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only t

20、he edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 10251, Copper, lead, zinc and nickel concentrates Determination of mass loss of bulk material on dryingISO 12743, Copper, lead, zinc and nickel concentrates Sampling

21、 procedures for determination of metal and moisture contentISO 12744, Copper, lead, zinc and nickel concentrates Experimental methods for checking the precision of samplingISO 12745, Copper, lead and zinc ores and concentrates Precision and bias of mass measurement techniques3 Terms and definitionsF

22、or the purposes of this document, the following terms and definitions apply.3.1lotquantity of concentrate to be sampled3.2wet mass of the lotcombined mass of concentrate and moisture of the lot at the time of weighing and sampling3.3moisture determinationquantitative measurement of the mass loss of

23、the moisture test portion under the conditions of drying specified in ISO 102513.4chemical analysisquantitative determination of the required chemical constituents of the analysis test portion3.5precisionmeasure of the random variations within a set of measurements ISO 2016 All rights reserved 1BS I

24、SO 13543:2016ISO 13543:2016(E)3.6dry mass of the lotmass of concentrate in the lot after correcting for the mass of moisture in the lot4 Determination of mass of contained metal4.1 GeneralThe mass of contained metal in a lot is determined from measurements of the wet mass, moisture content and dry b

25、asis metal content.4.2 Wet mass of the lotThe wet mass of the lot shall be determined using static scales, belt scales or draft surveys. However, due to their superior precision, static scales are recommended.4.3 Metal content of the lotSamples for chemical analysis shall be collected in accordance

26、with ISO 12743 and analysed in accordance with the relevant ISO chemical analysis standards.4.4 Dry mass of the lotCalculate the dry mass of the lot using Formula (1):mmMDW=1100(1)wheremDis the dry mass of the lot, in tonnes;mWis the wet mass of the lot, in tonnes;M is the moisture content of the lo

27、t, in percent of the wet mass (mass fraction).4.5 Mass of contained metal4.5.1 Major elementsFor the major elements copper, lead, zinc, and nickel, the mass of contained metal in the lot is given by Formula (2):mmaMDL=100(2)wheremMis the mass of contained metal in the lot, in tonnes;mDis the dry mas

28、s of the lot, in tonnes;aLis the metal content of the lot on a dry basis, in percent (mass fraction).2 ISO 2016 All rights reservedBS ISO 13543:2016ISO 13543:2016(E)Alternatively, Formula (2) may be rewritten as Formula (3):mmFaMWL=100(3)where F is the moisture factor given by Formula (4):FM=1100(4)

29、4.5.2 Precious metalsFor the precious metals silver and gold, the mass of contained metal in the lot is given by Formula (5):mmFaMWL=1000(5)wheremMis the mass of contained metal in the lot, in kilograms;mWis the wet mass of the lot, in tonnes;F is the moisture factor;aLis the precious metal content

30、of the lot on a dry basis, in grams per tonne (mass fraction).5 Determination of variance of mass of contained metalThe variance of the mass of contained metal in the lot may be determined from Formula (3) by taking the partial derivatives with respect to the wet mass, the moisture factor and the me

31、tal content of the lot as given in Formula (6):smmsmFsmasMMWWMFMLT222222=+2(6)wheresM2is the estimated variance of the mass of contained metal in the lot;sW2is the estimated variance of the wet mass of the lot;sF2is the estimated total variance of the moisture factor = (sH/100)2with sHbeing the tota

32、l precision (one standard deviation) of moisture determination;sT2is the estimated total variance of the metal content of the lot.NOTE The estimated total variances of the moisture factor and the metal content include the contributions from primary sampling, sample processing and analysis. ISO 2016

33、All rights reserved 3BS ISO 13543:2016ISO 13543:2016(E)Determining the partial derivatives and substituting them into Formula (6) gives Formula (7):sFasmasmFMLWWLFW222222100 100 100=+sT2(7)Formula (7) may be simplified as Formula (8):smsmsFsaMMWWFTL22222222=+(8)Formula (8) is applicable to both the

34、major elements and the precious metals.The variance of the wet mass of the lot shall be determined in accordance with the procedures specified in ISO 12745 for estimating the precision of mass measurement techniques. The variances of the moisture factor and the metal content of the lot shall be dete

35、rmined according to the procedures specified in ISO 12744. The analyses shall be carried out according to the methods prescribed in relevant International Standards.6 Examples of calculation of contained metal and its variance6.1 Static scale6.1.1 GeneralAssume a 500 t lot containing a mass fraction

36、 of 30 % copper, a mass fraction of 10 g of gold/t and a mass fraction of 8 % moisture is weighed using a static hopper scale with a capacity of 25 t, i.e. 20 hopper loads. The precision (one standard deviation) of the hopper scale is 0,1 % relative. The lot is divided into 10 sub-lots and a single

37、moisture determination is carried out on each subsample. A single lot sample is constituted for chemical analysis. The total precisions of the copper, gold and moisture determinations (one standard deviation) are mass fractions of 0,05 % copper, 0,5 g of gold/t and 0,1 % moisture absolute, respectiv

38、ely.6.1.2 Mass of contained coppermW= 500 tsW2225 0110020 0 0125=,F = =18100092,sF2201100100 0000001=()=,aL= 30 % copper4 ISO 2016 All rights reservedBS ISO 13543:2016ISO 13543:2016(E)sT2= (0,05)2= 0,002 5Formulae (3) and (8) givemMtcopper=500 09230100138,sM2222221380 01255000 000000 10920 002530138

39、= +=,0 00000005 0 00000012 0 000002 780 00095 0 002 30052 9,+()=+= 0 056,Calculation of the standard deviation sMgivessM= 0,24 t copperHence, at the 95 % confidence level (i.e. two standard deviations), the mass of contained copper metal ismM= 138 0,5 t copper (i.e. 0,4 % relative)The 95 % confidenc

40、e range is 137,5 t of copper to 138,5 t of copper.The precision of the measured copper content of the lot is the major contributor to the uncertainty in the mass of contained metal. The uncertainty can be reduced by carrying out additional analyses on the lot sample, or, in future, by analysing each

41、 sub-lot separately.6.1.3 Mass of contained goldmW= 500 tsW2225 0110020 0 0125=,F = =18100092,sF2201100100 000000 1,()=aL= 10 g of gold/tsT2205 025=()=,Formulae (5) and (8) givemMkggold=500 09210100046, ISO 2016 All rights reserved 5BS ISO 13543:2016ISO 13543:2016(E)sM222222460 01255000 000 000 1092

42、0251046 0= +=,0000000 05 0 000000 12 0 002 50 000 001 10000 00250052 90+()=+=,053Calculation of the standard deviation sMgivessM= 0,23 kg goldHence, at the 95 % confidence level, the mass of contained gold ismM= 4,6 0,5 kg gold (i.e. 11 % relative)The 95 % confidence range is 4,1 kg of gold to 5,1 k

43、g of gold.The precision of the measured gold content of the lot is the major contributor to the uncertainty in the mass of contained metal. Once again, the uncertainty can be reduced by carrying out additional analyses on the lot sample, or, in future, by analysing each sub-lot separately.6.2 Draft

44、surveyAssume a lot containing a mass fraction of 30 % copper and 8 % moisture has a wet mass of 25 000 t. If the wet mass is determined by draft survey with a relative precision (one standard deviation) of 1 % and the copper and moisture content of the lot have been determined with total precisions

45、(one standard deviation) of mass fractions of 0,05 % copper and 0,1 % moisture absolute respectively, thenmW= 25 000 tsW2225000 110062 500= F = =18100092, sF22011000 000001=,aL= 30 % coppersT2200500025=()=,Hence, Formulae (3) and (8) givemMtcopper=25 000 092301006900,6 ISO 2016 All rights reservedBS

46、 ISO 13543:2016ISO 13543:2016(E)sM2222269006250025 0000 000 0010920 00253069= +=,000 0 00010000 0012000000284761 57 13349512+ +()=+=, ,Calculation of the standard deviation sMgivessM= 70 t copperHence, at the 95 % confidence level, the mass of contained copper metal ismM= 6 900 140 t copper (i.e. 2,

47、0 % relative)The 95 % confidence range is 6 760 t of copper to 7 040 t of copper.Clearly, the precision of mass determination is the major contributor to the uncertainty in the mass of contained metal. This situation is typical when the wet mass of the lot is determined by draft survey, which is muc

48、h less precise than using weigh hoppers. ISO 2016 All rights reserved 7BS ISO 13543:2016ISO 13543:2016(E)Bibliography1 ISO 10258, Copper sulfide concentrates Determination of copper content Titrimetric methods2 ISO 10378, Copper, lead and zinc sulfide concentrates Determination of gold and silver Fire assay gravimetric and flame atomic absorption spectrometric method3 ISO 10469, Copper sulfide concentrates Determination of copper Electrogravimetric method4 ISO 11441, Lead sulfide concentrates Determination of lead content Back titration of EDTA after precipitation of lead