1、Designation: C 416 97 (Reapproved 2007)Standard Classification ofSilica Refractory Brick1This standard is issued under the fixed designation C 416; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number
2、 in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This classification is limited to silica brick meeting thefollowing requirements:Alumina (Al2O3) content of less than 1.50 %.Titania (TiO2)
3、content of less than 0.20 %.Iron oxide (FeO3) content of less than 2.50 %.Calcium oxide (CaO) content of less than 4.00 %.Average modulus of rupture of not less than 500 psi (3.45MPa).1.2 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is ther
4、esponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 133 Test Methods for Cold Crushing Strength and Modu-lus of Rupture of RefractoriesNOT
5、E 1Chemical analysis of refractory products is determined by acombination of x-ray fluorescence (XRF) and inductively coupled plazma(ICP) using standard reference materials (SRM), including various typesof minerals and refractory materials that are available from the NationalInstitute of Standards a
6、nd Technology3and other appropriate sources.3. Significance and Use3.1 The presence of certain impurities in silica brick tends tolower their refractoriness and service limits. This classificationpermits those familiar with refractories to predict the refracto-riness of silica brick from their alkal
7、i and alumina contents.4. Basis of Classification4.1 Flux Factor Silica brick are classified on the basis ofimpurities by the use of a “flux factor,” which is equal to thepercent of alumina plus twice the percent of total alkalies.4.2 Types:4.2.1 Type ASilica brick having a flux factor of 0.50 orles
8、s.4.2.2 Type BAll other silica brick falling within the scopeof this classification.5. Test Methods5.1 The properties listed in this classification shall bedetermined in accordance with the following ASTM methods:5.1.1 Modulus of RuptureTest Method C 133.5.1.2 Chemical AnalysisXRF and ICP.6. Retests
9、6.1 Because of variables resulting from sampling and thelack of satisfactory reproducibility in tests conducted bydifferent laboratories, the material may be resampled andretested when requested by either the manufacturer or thepurchaser. This may apply in instances when the first testresults do not
10、 conform to the requirements prescribed in thisclassification. The final results to be used shall be the averageof at least two sets of results, each of which has been obtainedby following in detail the specified testing procedures.7. Keywords7.1 brick; refractories; silica1This classification is un
11、der the jurisdiction of ASTM Committee C08 onRefractories and is the direct responsibility of Subcommittee C08.92 on The JosephE. Kopanda Subcommittee for Editorial, Terminology and Classification.Current edition approved Oct. 1, 2007. Published November 2007. Originallyapproved in 1958. Last previo
12、us edition approved in 2002 as C 416 84 (2002).2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available fro
13、m National Institute of Standards and Technology (NIST), 100Bureau Dr., Stop 1070, Gaithersburg, MD 20899-1070, http:/www.nist.gov.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM International takes no position respecting the va
14、lidity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is su
15、bject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headqu
16、arters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This stand
17、ard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).C 416 97 (2007)2
