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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Instructions are provided by supplies of laboratory equipment. An oxygen calorimetric bomb is necessary for this test.
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. 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.
The lid should have a hole in astn centre of a diameter of 1. Drying and weighing procedures as above. Small retorts of this type are conveniently heated by electricity which allows close control of temperature. Note down the different weights in percentage of the total initial weight in the following order: The acceptability r346 the product will be determined by it’s compliance with f346 values zstm down in the specification.
Non-condensable gases may be collected and analysed but more usually are simply burned to waste. Container made from wire cloth 3. Combining values from the two systems may result in non-conformance with the standard.
This practice also provides an analysis sample of coke from the gross or divided sample. These results are combined with the sieve analysis of the fine material excluded from the tumbler test to give a total evaluation of the charcoal’s quality.
The new charcoal producer quickly learns what can be done by himself and which e346 of the laboratory work can be contracted.
The drum is rotated at 24 r346 for one hour total 1, rev. When the required temperature is reached the retort is allowed to cool to room temperature and the yield of charcoal, tars and pyroligneous acid measured by weighing. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
But there are many which will be required only once a year or even less, particularly in a small plant. Accurately weigh grammes of dried sample and put it on screen No.
Chapter 8. Quality control of charcoal and by-products
The right to access the electronic files of ASTM Standards is for purposes of viewing for individual use only. The laboratory staff must be familiar with the different standards used for quality control of charcoal and by-products.
An offtake pipe leads through a condenser which collects the tars and pyroligneous d364 produced from the thermal decomposition of the wood. If you like to setup a quick demo, let us know at support madcad. Enter your account email address to request a password reset: Used for charcoal briquettes. Historical Version s – view previous versions of standard.
Dry the sample at a temperature of C not higher to reduce moisture content to zero. 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.
A white precipitate s346 barium sulphate will immediately appear.
You currently cannot view this content. Search book title Enter keywords for book title search. Remember me for one month. 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.
View Document – New York Codes, Rules and Regulations
Please login to your authorized staff account to use this feature. In the case of solid wood, pieces of an approximate size of 5 x 5 x 5 cm.
Release pressure and discharge the combustion ast by several rinsings with water into a beaker the contents of d3466 calorimeter must be completely transferred. The most common method being calorimetric combustion of the charcoal with the addition of diluted d46 hydroxide to convert sulphur to sulphates, which are largely precipitated with barium chloride as barium sulphate.
The most common set is: For charcoal and charcoal briquettes. The figures in per cent indicate the reduction in size suffered during the test. It is not necessary to detail all the standards which are used but merely to indicate a typical system. This practice may be used to provide a representative sample of the coke from which it is collected.
This is to prevent the finer charcoal cushioning the effect of rumbling on the coarse material during the test. Crushing is done manually in a porcelain mortar with a pestle. Put the hot crucible into a desiccator with calcium chloride as a desiccant, until the sample has cooled. For analysis, a set of standard screens with different mesh sizes are used. Large consumers, such as the steel or electrical industries, have their own quality control laboratories staffed by trainee operatives.
After rumbling the charcoal is sieve-analysed to ast, the size reduction which has occurred.
Standard Practice for Collection and Preparation of Coke Samples for Laboratory Analysis
satm Link to Active This link will always route atsm the current Active version of the standard. 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. 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.