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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Large consumers, such as the steel or electrical industries, have their own quality control laboratories staffed by trainee operatives.
Standard Practice for Collection and Preparation of Coke Samples for Laboratory Analysis
The charcoal is first sieved by hand to remove material which passes a 1. The test would be done by contract with a commercial testing authority, perhaps a university. 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. Pour the charcoal sample as received from the plant, or storage a little at a time into a ml calibrated cylinder.
ASTM D346/D346M – 11
When the ml calibration mark has been reached stop and weigh the charcoal fines. Continue procedure as described for raw material above.
Non-condensable gases may be collected and analysed but more usually are simply burned to waste. When the required temperature is reached the retort is allowed to cool asttm room temperature and the yield of charcoal, tars and pyroligneous acid measured by weighing.
The effect of tumbling on the charcoal is tested as follows. Dry the sample at a temperature of C not higher to reduce moisture content to zero.
The container is made of copper or stainless steel and constitutes in effect a small closed retort. Search book title Enter r346 for book title search. The procedure can be facilitated by using a machine for the shaking. For charcoal and charcoal briquettes. Place the crucible in a wire triangle firmly on a d46 and heat the bottom gently with a Bunsen burner, placed at a distance of not less than 6 cm from the crucible.
Combining values from the two systems may result in non-conformance with the standard. An offtake pipe leads through a condenser which collects the tars and pyroligneous acids produced from the thermal decomposition of the wood.
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. Historical Version s – view previous versions of standard Translated Version s: Prepare sample as above. The lid should have a hole in the centre of a diameter of 1.
Special apparatus can be purchased. No items in cart. Check weight and temperatures at intervals until weight loss is under 0.
ASTM International – Standard References for ASTM D / DM – 11
It is not necessary to detail all the standards which are used but merely to indicate a typical system. The most common set is: An oxygen calorimetric bomb is necessary for this test. 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.
The weight obtained multiplied by 10 gives the bulk density per litre. This practice may be used to provide a representative sample of the coke from which it is collected. If you like to setup a quick demo, let us know at support madcad. But there are many which will be required only once a year or even less, particularly in a small plant.
The new charcoal producer quickly learns what can be done by himself and which part of the laboratory v346 can be contracted.
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