1、Designation: C 607 88 (Reapproved 2005)Standard Practice forCoking Large Shapes of Carbon-Bearing Materials1This standard is issued under the fixed designation C 607; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. A number 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 practice covers the preparation of coking ofcarbon-bearing material for subsequent testing such as modu-lus of ruptu
3、re, slag testing, thermal conductivity, and thermalexpansion. Test Methods C 831 is the specified method fortesting residual carbon.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for i
4、nformation onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regu
5、latory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 133 Test Methods for Cold Crushing Strength and Modu-lus of Rupture of RefractoriesC 767 Test Method for Thermal Conductivity of CarbonRefractoriesC 768 Practice for Drip Slag Testing Refractory Materials atHigh Temperature
6、3C 831 Test Methods for Residual Carbon, Apparent Re-sidual Carbon, and Apparent Carbon Yield in CokedCarbon-Containing Brick and ShapesC 832 Test Method of Measuring the Thermal Expansionand Creep of Refractories Under LoadC 874 Practice for Rotary Slag Testing of Refractory Mate-rials3. Significan
7、ce and Use3.1 This practice is useful for preparing coked specimensfor subsequent testing where the shapes desired cannot be fittedinto the coking box described in Test Methods C 831.3.2 This practice can be very sensitive to heating rates incoking. Thus, strict adherence to the coking procedure isn
8、ecessary.4. Apparatus4.1 Furnace, gas-, oil-, or electric-fired, with heating cham-ber capable of receiving the coking box shown in Fig. 1.4.2 Box, stainless steel, essentially as shown in Fig. 1.5. Preparation of Samples5.1 Refer to the appropriate test method(s) or practice (forexample, Test Metho
9、ds C 133, Test Method C 767, PracticeC 768, Test Methods C 831, Test Method C 832, or PracticeC 874) for sample requirements.6. Procedure6.1 Spread a 2-in. (51-mm) layer of dry metallurgical coke,passing a No. 12 (1.70-mm) sieve or a 10-mesh Tyler StandardSeries, over the bottom of the coking box.6.
10、2 Push the sample tray through the coke until it rests onthe bottom.6.3 Set the specimens approximately 1 in. (25 mm) apart inthe tray, and uniformly spaced from the box sides.6.4 Place a protected thermocouple inside the box and nearthe center specimens for temperature control.6.5 Secure the lid on
11、 the box to prevent excessive leakage.6.6 Place the loaded box in the furnace heating chamberwith the nitrogen inlet, thermocouple, and outlet pipe extend-ing through a bricked-up door.6.7 Purge the coking box with nitrogen containing no morethan 10 ppm (10 mg/L) oxygen and maximum dew point of76F (
12、60C). Thereafter, provide sufficient flow of 3 to4ft3/h (24 to 32 mL/s) to maintain positive pressure within thebox throughout the entire heating and cooling period (Note 1).If desired, the gases and liquids escaping from the coking boxthrough the outlet pipe may be ignited outside the furnace.NOTE
13、1The purpose of the nitrogen is to prevent oxidation of thecarbonaceous residues within the brick.6.8 Heat the furnace so that the thermocouple within the boxregisters 250F (120C) after the first hour; then heat thefurnace so that the box is heated at a rate of 400 6 20F (2206 11C)/h to 1800 6 20F (
14、980 6 11C).6.9 Hold the temperature for 3 612 h, starting from thetime 1780F (970C) is reached in the box.1This practice is under the jurisdiction ofASTM Committee C08 on Refractoriesand is the direct responsibility of Subcommittee C08.04 on Chemical Behaviors.Current edition approved Dec. 1, 2005.
15、Published December 2005. Originallyapproved in 1967. Last previous edition approved in 2000 as C 607 88 (2000).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 s
16、tandards Document Summary page onthe ASTM website.3Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6.10 After completing the hold period, shut off the furnaceand allow the coking box to cool naturally within the furnace.6.1
17、1 Remove the samples from the coking box after the boxhas cooled sufficiently to handle.7. Keywords7.1 carbon yield; coking; loss of ignition; refractories;residual carbonASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedi
18、n 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 subject to revision at any time by the responsible technical committee and mu
19、st 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 Headquarters. Your comments will receive careful consideration at a meeting of th
20、eresponsible 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 standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C70
21、0, 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).FIG. 1 Coking BoxC 607 88 (2005)2
