【AS澳大利亚标准】AS TR2.11.11-2008 Certified reference materials Coal—Preparation and certification of ASCRM 011-11(Hardgrove grindability index).doc

tr 2.11-112008accessed by university of south australia on 06 mar 2008tr 2.11-112008technical reportcertified reference materialscoalpreparation and certification ofascrm 011-11(hardgrove grindability index)this australian technical report was prepared by committee mn-001, coal and coke. it was approved on behalf of the council of standards australia on 24 january 2008.this technical report was published on 27 february 2008.the following are represented on committee mn-001:australasian institute of mining and metallurgyaustralian building codes boardaustralian coal associationaustralian coal preparation societyaustralian institute of energycoalfield geology council of nswcsiro, energy technologydepartment of natural resources, mines and energy, qldminerals council of australianational generators forumuniversity of newcastleuniversity of new south walesuniversity of queenslandadditional interests:acirl limitedstandards australia wishes to acknowledge the participation of the expert individuals that contributed to the development of this standard through their representation on the committee.accessed by university of south australia on 06 mar 2008keeping standards up-to-dateaustralian standards are living documents that reflect progress in science, technology and systems. to maintain their currency, all standards are periodically reviewed, and new editions are published. between editions, amendments may be issued.standards may also be withdrawn. it is important that readers assure themselves they are using a current standard, which should include any amendments that may have been published since the standard was published.detailed information about australian standards, drafts, amendments and new projects can be found by visiting .authe standard is downloaded from standard sharingstandards australia welcomes suggestions for improvements, and encourages readers to notify us immediately of any apparent inaccuracies or ambiguities. contact us via email at .au, or write to standards australia, gpo box 476, sydney, nsw 2001.tr 2.11-112008accessed by university of south australia on 06 mar 2008technical reportcertified reference materialscoalpreparation and certification ofascrm 011-11(hardgrove grindability index)originated as tr 2.111989. previous edition tr 2.11-102006.revised and redesignated as tr 2.11-112008.copyright standards australiaall rights are reserved. no part of this work may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher.published by standards australia gpo box 476, sydney, nsw 2001, australiaisbn 0 7337 8559 x5tr 2.11-112008prefaceto meet the needs of the coal industry, the standards australia committee mn-001, coal and coke has coordinated the preparation and certification of reference coal samples for the calibration of hardgrove grindability machines, as required by as 1038.20.these australian standard certified reference materials (ascrms) are available from standards australia in sets of four, and are designated ascrm 011-11 a, b, c and d. samples in each set are 4.0 mm nominal top size and approximately 2 kg mass. each set is accompanied by a certificate.these samples represent a replacement for the asrm 011-10 set a, b, c and d issued in2006.contentspage1scope .3 2referenced document . 33the australian reference machine . 34calibration of the australian reference machine . 35selection of samples . 46sample preparation . 47regression equation selection . 48results . 49certified values. 5the standard is downloaded from standard sharingaccessed by university of south australia on 06 mar 200810certificate of analysis . 7 standards a.auaccessed by university of south australia on 06 mar 2008standards australiatechnical reportcertified reference materialscoalpreparation and certification of ascrm 011-11 (hardgrove grindability index)1 scopethis document describes the preparation and certification of the coal sample set, ascrm 011-11.2 referenced documentthe following document is referred to in this document: as1038coal and cokeanalysis and testing1038.20 part 20: higher rank coalhardgrove grindability index3 the australian reference machinethe australian reference machine is maintained by acirl limited for the verification of standard reference samples for hardgrove grindability determination.the bowl and race components were replaced with new components in december 1997. the parts being manufactured and certified in accordance with the requirements of as 1038.20.4 calibration of the australian reference machinethe australian reference machine was calibrated with a reference coal sample set supplied by the american society for testing and materials, (astm 08-07), and subsequent check against (asrm 011-10). the results of this test work are given in table 1.table 1calibration and check of national hardgrove machinereference coalmass passing 75 m test sieve, gastm 08-07 value39588299test 1 test 23.44 3.546.24 6.289.69 9.7611.89 11.96mean3.496.269.7311.93asrm 011-1032507297test 1 test 22.03 2.074.72 4.727.56 7.5011.01 11.04mean2.054.727.5311.035 selection of samplesaustralian coals were selected to cover the range of hardgrove grindability index (hgi)values normally encountered. the following types were used:(a) sample a = wilkie creek, (thermal coal) qld. (b)sample b = hunter valley (thermal coal), nsw.(c) sample c = blackwater stewarton c (thermal coal), qld. (d)sample d = norwich park (coking coal), qld.6 sample preparationapproximately 100 kg of each sample was prepared using the following procedure:(a) the coal was crushed to pass 4.0 mm, air dried, mixed and divided by rotary sample division into 48 subsamples of approximately 2 kg mass.(b) a 1 kg test portion was extracted from each of four subsamples of samples, a, b, c and d. these were prepared and analysed for hardgrove grindability index in accordance with the requirements of as 1038.20.7 regression equation selectionfor quality control purposes, the results of testing the astm reference coals were compared against those for the previous asrm 011-10 reference coals. the comparison was deemed to be within an acceptable range, and the linear regression equation for the astm certified reference coal (equation 1) was adopted for verification of the ascrm 011-11 hgi reference coals (see clause 8).2wherehgi=7.078x+13.935, r= 1.000. . . (1)x=the mass % of material passing a 75 m sieve determined in accordance with as 1038.20.accessed by university of south australia on 06 mar 20088 resultsthe duplicate results shown in table 2 were obtained from the tests carried out inclause 6(b) and use of the regression equation (equation 1) given in clause 7.table 2ascrm 011-11 hgi analytical resultstestsampleabcdtest 131.3531.2148.4148.4865.7566.1792.3692.65test 231.4231.8448.5548.3465.6865.5491.8791.66test 331.4932.0648.4849.0465.7565.8292.6592.36test 431.7031.3548.6948.4165.8965.9691.8792.08mean31.5548.5565.8292.19std dev.0.000.000.150.20range0.850.700.630.99the standard is downloaded from standard sharing standards a.auaccessed by university of south australia on 06 mar 20089 certified valuesthe values for the set of samples are given in table 3.table 3certified values (ascrm 011-11)samplehgia32b49c66d92note: to minimize deterioration of the samples, containers should be kept tightly sealed and the samples stored in a cool, dark place.the standard is downloaded from standard sharingaccessed by university of south australia on 06 mar 2008notesaccessed by university of south australia on 06 mar 2008standards australiacertified reference materialsascrm 011-11coal certificate of analysisanalysis for hardgrove grindability index (hgi)certified valuessamplehgia32b49c66d92note: to minimize deterioration of the samples, containers should be kept tightly sealed and the samples stored in a cool, dark place.accessed by university of south australia on 06 mar 2008the standard is downloaded from standard sharingaccessed by university of south australia on 06 mar 2008standards australiastandards australia develops australian standards and other documents of public benefit and national interest. these standards are developed through an open process of consultation and consensus, in which all interested parties are invited to participate. through a memorandum of understanding with the commonwealth government, standards australia is recognized as australias peak non-government national standards body. standards australia also supports excellence in design and innovation through the australian design awards.for further information visit .auaustralian standardscommittees of experts from industry, governments, consumers and other relevant sectors prepare australian standards. the requirements or recommendations contained in published standards are a consensus of the views of representative interests and also take account of comments received from other sources. they reflect the latest scientific and industry experience. australian standards are kept under continuous review after publication and are updated regularly to take account of changing technology.international involvementstandards australia is responsible for ensuring the australian viewpoint is considered in the formulation of international standards and that the latest international experience is incorporated in national standa