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ASTM C874-99(2004)

(Practice)

Standard Practice for Rotary Slag Testing of Refractory Materials

Standard Practice for Rotary Slag Testing of Refractory Materials

SIGNIFICANCE AND USE
This practice outlines a procedure which, when appropriate evaluation methods are added, can be useful in the development of new products or in the selection of products to be used in contact with a particular slag composition.
A gradient exists through the test specimens that is controlled by the thermal conductivity of the specimens and backup material. The slag is constantly renewed so that a high rate of corrosion is maintained. The flow of the slag can cause mechanical erosion of materials. The tilt and rotational speed of the furnace will affect the amount of mechanical erosion.  
Use caution in interpreting results when materials of vastly different types are included in a single run. Care must be taken to prevent oxidation of carbon-containing materials during heat up; failure to do so can result in highly erratic results. A reference refractory specimen, or specimens, should be used for comparison.
SCOPE
1.1 This practice describes a procedure for comparing the behavior of refractories to the action of molten slag in a rotating test furnace. A reference material should be included in each test and run for comparison. No numeric results are obtained from this practice. Numeric evaluation of test results is the responsibility of the test operator. The test and equipment are patterned after a method developed by Valley Dolomite Corporation.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-Aug-2004
ICS
81.080 - Refractories
Technical Committee
C08 - Refractories
Drafting Committee
C08.04 - Chemical Behaviors
Current Stage
Ref Project

Relations

Replaces
ASTM C874-99 - Standard Practice for Rotary Slag Testing of Refractory Materials
Effective Date
01-Sep-2004
Replaced By
ASTM C874-99(2009) - Standard Practice for Rotary Slag Testing of Refractory Materials
Effective Date
01-Mar-2009
Referred By
ASTM C607-88(2016) - Standard Practice for Coking Large Shapes of Carbon-Bearing Materials
Effective Date
01-Sep-2004

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ASTM C874-99(2004) - Standard Practice for Rotary Slag Testing of Refractory MaterialsASTM C874-99(2004) - Standard Practice for Rotary Slag Testing of Refractory Materials
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ASTM C874-99(2004) - Standard Practice for Rotary Slag Testing of Refractory Materials
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:C 874–99 (Reapproved 2004)
Standard Practice for
Rotary Slag Testing of Refractory Materials
This standard is issued under the fixed designation C 874; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Apparatus
1.1 This practice describes a procedure for comparing the 3.1 Furnace, consisting of a cylindrical shell, typically 18
behavior of refractories to the action of molten slag in a in. (456 mm) long and with a 10-in (254-mm) inside diameter,
rotatingtestfurnace.Areferencematerialshouldbeincludedin mounted on rollers and motor driven. Both the rotation and tilt
each test and run for comparison. No numeric results are of the furnace along its long axis should allow for adjustment.
obtained from this practice. Numeric evaluation of test results 3.2 Burner—A gas-oxygen torch capable of heating the
istheresponsibilityofthetestoperator.Thetestandequipment furnace to 3200°F (1760°C). The burner should be equipped
are patterned after a method developed by Valley Dolomite with flowmeters to monitor gas and oxygen flows.
Corporation . 3.3 Optical Pyrometer.
1.2 The values stated in inch-pound units are to be regarded 3.4 Tools, for (1) a means of feeding slag pellets into
as the standard. The values given in parentheses are for furnace, and (2) to assemble and dismantle the furnace.
information only. 3.5 Gas Atmosphere Analyzer and Sampling Equipment.
1.3 This standard does not purport to address all of the 3.6 Mold, to form plastic, castable, and rammed samples.
safety concerns, if any, associated with its use. It is the 3.7 Molds, to form slag pellets.
responsibility of the user of this standard to establish appro- 3.8 Abrasive Saws, to cut brick samples.
priate safety and health practices and determine the applica- 3.9 Supply of Granular Refractory Backup Material.
bility of regulatory limitations prior to use. 3.10 Safety Equipment.
2. Significance and Use 4. Test Specimens
2.1 This practice outlines a procedure which, when appro- 4.1 Test specimens should be 9 in. (228 mm) long and have
priate evaluation methods are added, can be useful in the a cross section as shown in Fig. 1. The 1.75 by 9-in. (44 by
development of new products or in the selection of products to 228-mm) face should be an original surface.
be used in contact with a particular slag composition. 4.2 One or more reference samples should be included in
2.2 A gradient exists through the test specimens that is each test run.
controlled by the thermal conductivity of the specimens and
5. Assembly
backup material. The slag is constantly renewed so that a high
5.1 Six test specimens, as described in Section 4, shall
rate of corrosion is maintained. The flow of the slag can cause
mechanical erosion of materials. The tilt and rotational speed constitute a test lining. This lining can be assembled around a
hexagonal shaped mandrel with 1.75-in. (44-mm) faces and
of the furnace will affect the amount of mechanical erosion.
2.3 Use caution in interpreting results when materials of taped or steel-banded for subsequent handling. The lining
should be positioned midway in the 18-in. (456-mm) length of
vastly different types are included in a single run. Care must be
taken to prevent oxidation of carbon-containing materials the shell. Any suitable granular or castable refractory material
may be installed behind the test lining.
during heat up; failure to do so can result in highly erratic
results. A reference refractory specimen, or specimens, should 5.2 It has been found convenient to use precast plugs to fill
the two ends of the shell. These should be 4.5 in. (114 mm)
be used for comparison.
thick by 10 in. (254 mm) in diameter to fit inside the shell. The
hexagonal holes in the plug should match those of the test
lining. For basic slags, the plugs should be formed using a
ThispracticeisunderthejurisdictionofASTMCommitteeC08onRefractories
and is the direct responsibility of Subcommittee C08.04 on Chemical Behaviors.
98 % MgO ramming or casting mix; for acid slags, the plugs
Current edition approved Sept. 1, 2004. Published October 2004. Originally
shall be formed using a +90 %Al O ramming or casting mix.
2 3
approved in 1977. Last previous edition approved in 1999 as C 874 – 99.
2 The whole assembly should be held in place by retaining rings
Cash, P., “Measuring Refractory Resistance to Hot Slags,” Ceramic Age,
August 1966, pp. 20–29. bolted to each end of the shell.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C 874–99 (2004)
NOTE 1—Dimensions are in inches.
NOTE 2—Six cuts are needed for complete lining.
SI Equivalents
in. mm
1.75 44
2.5 64
3.0 76
4.5 114
FIG. 1 Cross Section of Cut Brick Samples for Lining the
...

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