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 retort should be heated gently with the astn flame to allow the moisture to be driven off and avoid overheating of the charge at any point. Values are state ins SI units when inch-pound units are not used in practice.

Enter your account email address to request a password reset: Preparation of charcoal sample. Small-scale charcoal producers for economic reasons, engage the services of an existing laboratory, either through a university or privately. ASTM grants you a license as follows: Non-condensable gases may be collected and analysed but more usually are simply burned to waste. The rise in asstm is monitored with the thermocouple and allowed to rise to final temperature over a few hours.

You currently cannot view this content. Combustion takes place under an excess of oxygen and the pressure is kept at 20 atm.

Standards for charcoal testing are derived from fuels such as coal or coke and, in some cases, are modified to apply specifically to charcoal analysis. Crushing is done manually in a porcelain mortar with a pestle.

Prepare sample as above.

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. The most important of these test methods which apply to charcoal testing are listed on the following page.


The conditions in the small retort are not very similar to continuous large-scale retort systems. 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. After minutes, open the gas adjusting screw and the air control of the Bunsen burner to full capacity and continue heating until the small flame above the pinhole of the lid has ceased.

Chapter 8. Quality control of charcoal and by-products

The electronic file may not be reproduced in any way. The extensive data on the carbonisation of the various species of eucalypts quoted by 20 were obtained in this way and show how comparative studies of this type can asttm as a guide in choice of raw material. Combining values from the two systems may result in non-conformance with the standard.

Crush sample in a porcelain mortar and accurately weigh 3 grammes. Please login to your authorized staff account to use this feature. The figures in per cent indicate the reduction in size suffered during the test.

Price variations may also apply where standard quality indicators are not met. For analysis, a set of standard screens with different mesh sizes are used.

But there are many which will be required only once a year or even less, particularly in a small plant. Large consumers, such as the steel or electrical industries, have their own quality control laboratories staffed by trainee operatives. Fixed carbon content is an important parameter in steel making charcoal since this is the agent which reduces the iron ore to metallic iron and limits which must be met are often specified.


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Search book title Awtm keywords for book title search. This practice also provides an analysis sample of coke from the gross or divided sample. The value for the fixed carbon is calculated as xstm Put the hot crucible into a desiccator with calcium chloride as a desiccant, until the sample has cooled.

Dry the sample at a temperature of C not higher to reduce moisture content to zero. Drying and weighing procedures as above.

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For charcoal and charcoal briquettes. The loss of weight will be calculated as a percentage of the initial wet weight. The most common set is: The buying specification of large industrial users and others will refer to various parameters measured in the process of quality control.

The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.

Are you sure you want to empty the cart? Note down the different weights in percentage of the total initial weight in the following order: This practice also provides an analysis sample of coke from the gross asym divided sample.