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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Crushing is done manually in a porcelain mortar with a pestle. In addition the electronic files may not be downloaded or distributed elsewhere over computer networks or otherwise.
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The lid should have a hole in the centre of a diameter of 1. Therefore, the lower the per cent figure the better the charcoal.
Because of the variability of coke and the wide variety of astj 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.
Zstm extensive data on the carbonisation of the various species of eucalypts quoted by 20 were obtained in this way and show how comparative studies of this type can serve as a guide in choice of raw material. The retort d3466 filled to about 0. The most common 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. Remember me for one month.
The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Accurately weigh grammes of dried sample and put it on screen No.
This practice also provides an analysis sample of coke from the gross or divided sample.
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Are you sure you want to empty the cart? Enter your personal account email address to request a password reset: 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. Historical Version s – view previous versions of standard. According to estimated ash content accurately weigh three or five grammes in a platinum or porcelain crucible with lid.
Crush or grind sample and weigh accurately 3 grammes in a platinum or porcelain crucible with a lid. Calculate barium sulphate content by weight difference. Check weight and temperatures at intervals until weight loss is under 0.
The drum is rotated at 24 rpm for one hour total 1, rev.
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.
Accurately weigh one gramme of the dry powdered sample and insert it into the calorimeter following the instructions given by the equipment supplier.
The acceptability of the product will be determined by it’s compliance with the values laid down in the specification. Such modifications must be mentioned in the charcoal analysis report. Values are state ins SI units when inch-pound units are not used in practice. The laboratory staff must be familiar with the different standards used for quality control of charcoal and by-products.
If you like to setup a quick demo, let us know at support madcad. Method for charcoal and charcoal briquettes. For analysis, a set of standard screens with different mesh sizes are used. Continue drying and reweigh at one-hour intervals until the loss is not more than 0.
Content only available by subscription. Large consumers, such as the steel or electrical industries, have their own quality control laboratories staffed by trainee operatives.
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The procedure can be facilitated by using a machine for the shaking. Accurately weight one gramme of the powdered sample in a platinum preferable or porcelain crucible with a lid with the following dimensions: The most common set is: Note down the different weights in percentage of the total initial weight in the following order: Register for a trial account.
Container made from wire cloth 3. 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. It is not necessary to detail all the standards which are used but merely to indicate a typical system.
Shake the whole screen set for two minutes. A correction can be made for moisture content to express ash on a moisture free basis. Small retorts of this type are conveniently heated by electricity which allows close control of temperature. A simple apparatus for these tests is shown in Fig. Historical Version s – view previous versions of standard Translated Version s: But there are many which will be required only once a year or even less, particularly in a small plant.
Small-scale charcoal producers for economic reasons, engage the services of an existing laboratory, either through a university or privately.
The charcoal is first sieved by hand to remove material which passes a 1. Enter your account email address to request a password reset: The test would be done by contract with a commercial testing authority, perhaps a university.