The grain stability of calcined petroleum coke determines the resistance to breakdown of +4 mm particles used in the manufacture of carbon anodes for use . Designation: D/DM − Standard Practice for. Collection and Preparation of Coke Samples for Laboratory Analysis1 This standard is issued under the. ASTM D Standard Practice for Collection and Preparation of Coke Samples for Laboratory Analysis.

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The right to access f346 electronic files of ASTM Standards is for purposes of viewing for individual use only. The container is made of copper or stainless steel and constitutes in effect a small closed retort. For charcoal and charcoal briquettes.

The most common set is: The most common test used in viscosity determination of pyroligneous acid is the Engler-scale. Search book title Enter keywords for book title search.

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The lid should have a hole in the centre of a diameter of 1. Place the crucible in a wire triangle firmly on a tripod and heat the bottom gently with a Bunsen burner, placed at a distance of not less than 6 cm from the crucible. For analysis, a set of standard screens with different mesh sizes are used.

A correction can be made for moisture content to express ash on a moisture free basis. The difference between initial weight and weight of sample after combustion will be expressed as a percentage of the initial weight and represents the ash content. Drying and weighing procedures as above.


The drum is rotated at 24 rpm for one hour total 1, rev. The rise in temperature is monitored with the thermocouple and allowed to rise to asgm temperature over a few hours.


This practice also provides an analysis sample of coke from the gross or divided sample. Small-scale charcoal producers for economic reasons, engage the services of an existing laboratory, either through a university or privately.

Various countries have developed ast own standard f346 for quality control of solid fuels and these are applied with some modifications to the testing of charcoal. C346 cooling, the contents of the beaker are poured through a weighed glass filter which collects the barium-sulphate precipitate. This practice may be used to provide a representative sample of the coke from which it is collected. You currently cannot view this content. The analysis samples can be used to determine the value of the coke represented, its ability to meet specifications, as well as for other purposes.

Enter your personal account email address to request a password reset: The conditions in the small retort are not very similar to continuous large-scale retort systems.

Dry the sample at a temperature of C not higher to reduce moisture content to zero.

Release pressure and discharge the combustion residues by several rinsings with water into a beaker the contents of the calorimeter must be completely transferred. Prepare sample as above. Shake the whole screen set for two minutes. The testing methods for by-products are derived from standard analytical procedures for liquid chemicals and gaseous fuels. The most important of these test methods which apply to charcoal testing are listed on the following page.

Content only available by subscription. The charcoal maker engaging in export business may rely on his partners abroad, who are normally well equipped, and have capable staff to deal with problems which arise and provide customers with advice. The retort should be heated gently with the burner flame to allow the moisture to be driven off and avoid overheating of the charge at any point.


The procedure can be facilitated by using a machine for the shaking. An oxygen calorimetric bomb is necessary for this test.

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Then weigh the residue remaining on each screen. Quality control of charcoal and by-products 8. Method for charcoal and charcoal briquettes. The loss of weight will be calculated as a percentage of the initial wet weight. Because d3466 the variability of coke and the wide variety of sampling equipment, ashm must be exercised in all stages of sampling, from system specifications and equipment procurement to equipment acceptance testing and actually taking the final sample.

Values are state ins SI units when inch-pound units are not used in practice. The effect of tumbling on the charcoal is tested as follows. The values stated in each system may not asmt exact equivalents; therefore, each system shall be used independently of the other. The rim of the lid must comfortably overlap the rim of the crucible to prevent intake of air.

Small retorts of this type are conveniently heated by electricity which allows close control of temperature.