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 laboratory staff must be familiar with the different standards used for quality control of charcoal and by-products. The most important of these test methods which apply to charcoal testing are listed on the following page.
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Check weight and temperatures at intervals until weight loss is under 0. Used for charcoal briquettes.
The most common set is: By heating charcoal with exclusion of air oxygen volatile matter and gases are expelled. The drum is rotated at 24 rpm for one hour total 1, rev.
The testing methods for by-products are derived from standard analytical procedures for liquid chemicals and gaseous fuels. The value for the fixed carbon is calculated as follows: The charcoal is first sieved by hand to remove material which passes a 1.
Accurately weigh one gramme of the dry powdered sample and insert it into the calorimeter following the instructions satm by the equipment supplier. After rumbling the charcoal is sieve-analysed to measure the size reduction which has occurred. You currently cannot view this content.
An oxygen calorimetric bomb is necessary for this test. According to estimated ash content accurately weigh three or five grammes in a platinum or porcelain crucible with lid.
The test would be done by contract with a commercial testing authority, perhaps a university. The right to s346 the electronic files of ASTM Standards is for purposes of viewing for individual use only. This indicates that all volatile matter has been driven off.
Dry the sample at a temperature of C not higher to reduce moisture content to zero. Print 1 2 3 4 5 page sstarting from page current page. Are you sure you want to empty the cart? The new charcoal producer quickly learns what can be done by himself and which part of the laboratory work can be contracted.
A correction can be made for moisture content to express ash on a moisture free basis.
Chapter 8. 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. After cooling, the contents of the beaker are poured through a weighed glass filter which collects the barium-sulphate precipitate. When the ml calibration mark has been reached stop and weigh the charcoal fines. The container is made of copper or stainless steel and constitutes in effect a small closed retort.
Small retorts of this type are conveniently heated by electricity which allows close control of temperature. This practice may be used to provide a representative sample of the coke from which it is collected. This practice also provides an analysis sample of coke from the gross or divided sample.
Standard Practice for Collection and Preparation of Coke Samples for Laboratory Analysis
No items in cart. They all operate according to the general scheme of comparison of the sample with a liquid of known viscosity.
The loss of weight will be calculated as a percentage of the initial wet weight. The most common method being calorimetric combustion of the charcoal with the addition of diluted sodium hydroxide to convert sulphur to astn, which are largely precipitated with barium chloride as barium sulphate.
After rinsing the qstm several times with distilled water, oven dry it and weigh.
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Prepare sample as above. Continue drying and reweigh at one-hour intervals until the loss is not more than 0. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.