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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Moisture and Immersion Pan
Shake the whole screen set for two minutes. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other.
A correction can be made for moisture content to express ash on a moisture free basis. An offtake pipe leads through a condenser which collects x346 tars and pyroligneous acids produced from the thermal decomposition of the wood.
After cooling, the contents of the beaker are poured through a weighed glass filter which collects the barium-sulphate precipitate. Preparation of charcoal sample. The laboratory staff must be familiar with the different standards used for quality control of charcoal and by-products.
Print 1 2 3 4 5 page sstarting from page current page. Crush sample in a porcelain mortar and accurately weigh 3 grammes. Screen size, ash content and friability are also often specified by large buyers. You currently cannot view this content.
Standard Practice for Collection and Preparation of Coke Samples for Laboratory Analysis
After rumbling the charcoal is sieve-analysed r346 measure the size reduction which has occurred. The electronic file may not be reproduced in any way. It is the responsibility of the user of this astmm to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 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.
Historical Version s – view previous versions of standard Translated Version s: 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.
Note down the different aastm in percentage of the total initial weight in the following order: Small retorts of this type are conveniently heated by electricity which allows close control of temperature. The container is made of copper or stainless steel and constitutes in effect a small closed retort. According to estimated ash content accurately weigh three or five grammes in a platinum or porcelain crucible with lid.
Release pressure and discharge the combustion residues by several rinsings with water into a beaker the contents of the calorimeter must be completely transferred. Put the hot crucible into a desiccator with calcium chloride as a desiccant, until the sample has cooled. Combustion takes place under an excess of oxygen and the pressure is kept at 20 atm.
Enter your account email address to request a password reset: For analysis, a set of standard screens with different mesh sizes are used. The most aatm method being calorimetric combustion of the charcoal with the addition of diluted sodium hydroxide to convert sulphur to sulphates, which are largely precipitated with barium chloride as barium sulphate.
Such modifications must be mentioned in the charcoal analysis report. 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. Because of the variability of coke and the wide variety of sampling equipment, caution must be exercised in all stages of sampling, from system specifications and equipment procurement to equipment acceptance testing and actually taking the final sample.
The charcoal is first sieved by hand to remove material which passes a 1.
ASTM International – Standard References for ASTM D / DM – 11
Historical Version s – view previous versions of standard. 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.
By heating charcoal with exclusion of air oxygen volatile matter and gases are expelled. Please sign into an account with a subscription to this content, or email for help at d3446 madcad.
Because of the variability of coke and the wide variety of sampling equipment, caution must be exercised in all stages of sampling, from system specifications and equipment procurement to equipment acceptance testing and actually taking the e346 sample.
The new charcoal producer quickly learns what can be done by himself and which part of the laboratory work can be contracted. Combining values from the two systems may result in non-conformance with the standard.