ASTM D346 PDF
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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Accurately weigh one gramme of the dry d364 sample and insert it into the calorimeter following the instructions given by the equipment supplier. After rinsing the filter several times with distilled water, oven dry it and weigh. But there are many which will be required only once a year or even less, particularly in a small plant. Such modifications must be mentioned in the charcoal analysis report.
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. When the required temperature is reached the retort is allowed to cool to room temperature and the yield of charcoal, tars and pyroligneous acid measured by weighing.
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Standard Practice for Collection and Preparation of Coke Samples for Laboratory Analysis
Crushing is done manually in a porcelain mortar x346 a pestle. Screen size, ash content and friability are also often specified by large buyers. The conditions in the small retort are not very similar to continuous large-scale retort systems. Accurately weight one gramme of the powdered sample in a platinum preferable or porcelain crucible with a lid with the following dimensions: 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.
This practice also provides an analysis sample of coke from the gross or divided sample. The most common test used in viscosity determination of pyroligneous acid is the Engler-scale. The buying specification of large industrial users and others will refer sstm various parameters measured in the process of quality control.
Register for a trial account. The figures in per cent indicate the reduction in size suffered during the test. After ignition, the calorimeter has to be shaken for about half an hour. The retort is filled to about 0. ASTM D usually modified for charcoal. 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. They all operate according to the general scheme of comparison of the sample with a liquid ast, known viscosity.
The loss of weight will be calculated as a percentage of the initial wet weight. The value for the fixed carbon is calculated as follows: The weight obtained multiplied by 10 gives the bulk density per litre. The most common set is: Small-scale charcoal producers for economic reasons, engage the sstm of an existing laboratory, either through a university or privately.
Price variations may also apply where standard quality indicators are not met. The charcoal is first sieved by hand to remove material which passes a 1.
Content only available by subscription. Note down the different weights in percentage of the total initial weight in the following order: Special apparatus can be purchased.
The most important of these test methods which apply to charcoal testing are listed on the following page. 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.
Chapter 8. Quality control of charcoal and by-products
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Various countries have developed their own standard methods for quality control of solid fuels and these are applied with some modifications to the testing of charcoal.
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This practice may be used to provide a representative sample of the coke from which it is collected. Put the hot crucible into a desiccator with calcium chloride as a desiccant, until the sample has cooled. 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.
Crush sample in a porcelain mortar and accurately weigh 3 grammes. Testing must follow standardized methods in all cases to ensure that the results can be compared and the analysis repeated.
ASTM grants you a license as follows: This practice may be used to provide a representative sample of atm coke from which it is collected. The difference between the initial weight represents the volatile content.
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The drum is rotated at 24 rpm for one hour total 1, rev. These gases are called volatiles and consist of tarry vapours and non-condensible gases. These results are combined with the sieve analysis of the fine material excluded satm the tumbler test to give a total evaluation of the charcoal’s quality. Historical Version s – view previous versions of standard.
Combining values from the two systems may result in non-conformance with the standard. However, they have great value for comparison between various raw materials since the behaviour of known materials can be compared with new type raw materials or the effect of changing carbonisation temperature can be studied in a comparative way.
Enter your personal account email address to request a password reset: Release pressure and discharge the combustion astn by several rinsings with water into a beaker the contents of the calorimeter must be completely transferred.
Are you sure you want to empty the cart? The laboratory staff must be familiar with the different standards used for quality control of charcoal and by-products. Large consumers, such as the steel or electrical industries, have their own quality control laboratories staffed by trainee operatives.