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

Container made from wire cloth 3. Print 1 2 3 4 5 page sstarting from page current page. Calculate barium sulphate content by weight difference. The test would be done by contract with a commercial testing authority, perhaps a university. The procedure can be facilitated by using a machine for the shaking. Accurately weigh grammes of dried sample and put it on screen No.


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Combining values from the two systems may result in non-conformance with the standard. Pour the charcoal sample as received from the plant, or storage a little at a time into a ml calibrated cylinder. After rumbling the charcoal is sieve-analysed to measure the size reduction which has occurred. 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. Quality control of charcoal and by-products 8.

For charcoal and charcoal briquettes. A white precipitate of barium sulphate will immediately appear. The most important of these test methods which apply to charcoal testing are listed on the following page. There were no books found for the applied search filters.


Grinding is not recommended because the heat generated would satm drive off part of the volatiles. The testing methods for by-products are derived from standard analytical procedures for liquid chemicals and gaseous fuels.

The figures in per cent indicate the reduction in size suffered during the test. This practice may be used to provide a representative sample of the coke from which it is collected.

ASTM D346/D346M – 11

After ignition, the calorimeter has to be shaken for about half an hour. If you like to setup a quick demo, let us know awtm support madcad.

The new charcoal producer quickly learns what can be done by himself and which part of the laboratory work can be contracted. This practice also provides an analysis sample of coke from the gross or divided sample. The retort is filled to about 0. Then weigh the residue remaining on each screen. The yields of charcoal and liquid products can be easily measured and the effect of carbonising temperature studied. Testing must follow standardized methods in all cases to ensure that the results can be compared and the analysis repeated.

Combining values from the two systems may result in non-conformance with the standard. The rise in temperature is monitored with the thermocouple and allowed to rise to final temperature over a few hours.

Drying and weighing procedures as above. According to estimated ash content accurately weigh three or five grammes in a platinum or porcelain crucible with lid.

The rim of the lid must comfortably overlap the rim of the crucible to prevent intake of air. 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.


Put the hot crucible into a desiccator with calcium chloride as a desiccant, until the sample has cooled. This practice may be used to provide a representative sample of the coke from which s346 is collected.

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The loss of weight will be calculated as a percentage of the initial wet weight. Historical Version s – view previous versions of standard Translated Version s: The electronic file may not be reproduced in any way. Continue drying and reweigh at one-hour intervals until the loss is not more than 0. Therefore, the lower the per cent figure aastm better the charcoal. The acceptability of the product will be determined by it’s compliance with the values laid down in the specification.

No items in cart. 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. Crush or grind sample and weigh accurately 3 grammes in a platinum or porcelain crucible with a lid.