BS ISO 567:2021 pdf download.Coke — Determination of bulk density in a small container
This document specifies a method for the determination of the bulk density of coke in a cubical or cylindrical container of small capacity (0,2 m 3 ). It is applicable to coke with a nominal top size not greater than 125 mm.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 579, Coke — Determination of total moisture
ISO 728, Coke — Size analysis by sieving
ISO 13909‑5, Hard coal and coke — Mechanical sampling — Part 5: Coke — Sampling from moving streams
ISO 13909‑6, Hard coal and coke — Mechanical sampling — Part 6: Coke — Preparation of test samples
ISO 18283, Hard coal and coke — Manual sampling
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
coke bulk density
mass of a portion of coke divided by the volume of the container, which is filled by that portion under specified conditions outlined in the procedure
A container of known mass and volume is filled with coke and the increase in mass is determined.
5.1 Cubical or cylindrical container, of small capacity (0,2 m 3 ), with a smooth inner surface, and rigidly constructed. The exact volume of the small container shall be known. The container shall be waterproof and be resistant to deformation. A 200 l container (44 gallon drum) or a 100 l container is suitable for this purpose. A 44 gallon drum sliced to a height of 50 % is also suitable for this purpose.
5.2 Mass determination scale/machine, preferably of the platform type, of minimum capacity 200 kg and sufficiently accurate that the mass determination error does not exceed 0,1 % of the maximum load or 250 g, whichever is the smaller.
6 Test sample Take a representative sample in accordance with ISO 13909‑5 or ISO 18283. It is recommended that enough sample is taken to allow duplicate determinations and a reserve. Test samples of 3 × 200 kg for cokes ≤100 mm and for cokes 125 mm × 100 mm sample masses of 1 000 kg are recommended.
7 Procedure Determine the mass of the empty container by weighing the empty container, clean and dry on the scale or weighing machine (5.2) and record its mass, m 1 . Fill the container with water of known density until maximum capacity then determine the mass again. Determine the mass of water in the container and calculate the exact volume of the container in cubic metres, V.
NOTE The initial determination of m 1 and the volume of the container need only to be done in duplicate once during the first test. Thereafter these results are recorded and can be used for subsequent tests.
The container is emptied, cleaned and dried before proceeding with the test. It is recommended that the strip‑mixing and splitting technique outlined in ISO 13909‑6 and ISO 18283 be used to form the increments from the test sample that are charged to the container. Charge the coke slowly into the container until pieces of coke project above the top of the container across the whole surface.
The height of drop of the coke shall not exceed 250 mm from the mouth of the implement being used to transfer the coke to the container, to the bottom of the container. Slide a straight bar across the top of the container and remove any pieces of coke, which obstruct its passage. Determine the mass of the container plus the coke sample on the scale or weighing machine (5.2) and record its mass, m 2 . Carry out a duplicate determination by repeating the procedure using a second portion of the test sample. When the duplicate determinations are completed combine the test samples and prepare this sample for total moisture in accordance with ISO 13909‑6 or ISO 18283. The resultant total moisture test sample, M, shall be analysed in duplicate in accordance with ISO 579.BS ISO 567 pdf download.