ASTM C831-1998(2017) Standard Test Methods for Residual Carbon Apparent Residual Carbon and Apparent Carbon Yield in Coked Carbon-Containing Brick and Shapes&x2009 《焦化含碳砖和型材中残余碳 表观.pdf
《ASTM C831-1998(2017) Standard Test Methods for Residual Carbon Apparent Residual Carbon and Apparent Carbon Yield in Coked Carbon-Containing Brick and Shapes&x2009 《焦化含碳砖和型材中残余碳 表观.pdf》由会员分享,可在线阅读,更多相关《ASTM C831-1998(2017) Standard Test Methods for Residual Carbon Apparent Residual Carbon and Apparent Carbon Yield in Coked Carbon-Containing Brick and Shapes&x2009 《焦化含碳砖和型材中残余碳 表观.pdf(7页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C831 98 (Reapproved 2017)Standard Test Methods forResidual Carbon, Apparent Residual Carbon, and ApparentCarbon Yield in Coked Carbon-Containing Brick andShapes1This standard is issued under the fixed designation C831; the number immediately following the designation indicates the year
2、oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 These test methods cover the determination of residualcar
3、bon content in carbon-bearing brick and shapes after aprescribed coking treatment. They provide two procedures.The first procedure is based on the combustion of carbon andits measurement as carbon dioxide. However, when using thefirst procedure for articles that contain silicon carbide or othercarbi
4、des, no distinction will be made between carbon present inthe form of a carbide and carbon present as elemental carbon.The second procedure provides a method for calculatingapparent residual carbon (on the basis of weight loss afterigniting the coked specimens), apparent carbonaceous materialcontent
5、, and apparent carbon yield. If the second procedure isused for brick or shapes that contain metallic additives orcarbides, it must be recognized that there will be a weight gainassociated with the oxidation of the metals, or carbides, orboth. Such a weight gain can change the results substantiallya
6、nd this must be kept in mind when interpreting the data.1.2 The values stated in inch-pound units are to be regardedas the standard. The values given in parentheses are forinformation only.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is
7、 theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on sta
8、ndard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C571 Test Method for Chemical Analysis of Ca
9、rbon andCarbon-Ceramic Refractories (Withdrawn 1995)3D2906 Practice for Statements on Precision and Bias forTextiles (Withdrawn 2008)3E11 Specification for Woven Wire Test Sieve Cloth and TestSieves3. Significance and Use3.1 These test methods are designed for use with carbon-containing products. Th
10、e residual carbon content of a cokedcarbon-containing brick or shape is an indication of how muchcarbon may be available, in service, to resist slag attack on, oroxidation loss of, that body. Apparent carbon yield gives anestimate of the relative efficiency of the total carbonaceousmatter to be reta
11、ined as residual carbon.3.2 Residual carbon has a direct bearing on several proper-ties of a pitch or resin containing refractory such as ignitedporosity, density, strength, and thermal conductivity.3.3 These test methods are suitable for productdevelopment, manufacturing control, and specification
12、accep-tance.3.4 These test methods are very sensitive to specimen size,coking rates, etc.; therefore, strict compliance with these testmethods is critical.3.5 Appreciable amounts of reducible components, such asFe2O3, will have a noticeable effect on the results. Thus, valuesobtained by these test m
13、ethods will be different when brickremoved from service is tested. This must be kept in mindwhen attempting to use these test methods in an absolute sense.3.6 Oxidizable components such as metals and carbides canhave a noticeable effect on the results. This must be kept in1These test methods are und
14、er the jurisdiction of ASTM Committee C08 onRefractories and are the direct responsibility of Subcommittee C08.04 on ChemicalBehaviors.Current edition approved Nov. 1, 2017. Published November 2017. Originallyapproved in 1976. Last previous edition approved in 2013 as C831 98 (2013).DOI: 10.1520/C08
15、31-98R17.2For 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.3The last approved version of this historical standa
16、rd is referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Princi
17、ples for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1mind when using the second procedure, which is based onmeasuring weight loss after igniting the coked specimens.3.7 Testing of brick or s
18、hapes that contain magnesium metalpresents special problems since this metal is highly volatile andsubstantial amounts of the magnesium can be lost from thesample during the coking procedure. This must be kept in mindwhen interpreting the results of testing of brick that containsmagnesium. In additi
19、on, magnesium can react readily withatmospheric humidity. This must be kept in mind when storingbrick that contains magnesium.4. Apparatus4.1 For Coking:4.1.1 Gas or Electric Furnace, with heating chamber ca-pable of receiving the coking box shown in Fig. 1.NOTE 1Samples should not be subjected to t
20、hermal gradients greaterthan 40 F (22 C) during heatup. In electric furnaces with silicon carbideheating elements, the length of the box should be parallel to theseelements.4.1.2 Inner and Outer Box, stainless steel (or equivalentalloy), as shown in Figs. 1-3.4.2 For CO2Absorption:4.2.1 Laboratory P
21、ulverizer,4designed to provide a sealed,dustproof grinding chamber, and having a capacity of at least50 g of sample.4.2.2 Combustion-Tube Furnace, capable of operating at183 F (1000 C)4.2.3 CO2Absorption Train, as described in Fig. 4 and inTest Method C571.NOTE 2Commercial automatic and semi-automat
22、ic carbon determi-nators may replace the apparatus described in 4.2.2 and 4.2.3.4.3 The precision obtained with these instruments shallmeet the requirements specified in Section 10.4Typical grinders are: Blueler Mill, Applied Research Laboratories, Sunland,CA; Laboratory Disc Mill, Angstrom, Inc., B
23、ellville, MI; and Shatter Box, SpexIndustries, Inc., Metuchen, NJ.FIG. 1 Outer Coking Box (Dimensions are in Inches)C831 98 (2017)25. Preparation of Test Specimens5.1 This method assumes that the number of specimenstested will be a statistically valid sample of the entire lot ofbrick or shapes being
24、 evaluated. The exact number is usuallyarrived at by mutual agreement between parties concerned.5.2 Although sample brick from either the 412-in. (114-mm)or the 6-in. (152-mm) series may be tested, it is preferable touse the larger size for the test. Cut slices 1 6132 in. (25 60.8 mm) in thickness p
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMC83119982017STANDARDTESTMETHODSFORRESIDUALCARBONAPPARENTRESIDUALCARBONANDAPPARENTCARBONYIELDINCOKEDCARBONCONTAININGBRICKANDSHAPESX2009

链接地址:http://www.mydoc123.com/p-508467.html