BS ISO 556:2020 pdf free.Coke (greater than 20 mm in size]一Determination of mechanical strength.
BS ISO 556 This document specifies a method for the determination of the mechanical strength of coke having a particle size greater than 20 mm.
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 728, Coke (nominal top size greater than 20 mm)一Size analysis by sieving ISO 18283, Hard coal and coke一Manual sampling ISO 13909-6, Hard coal and coke一Mechanical sampling一Part 6: Coke一Preparation of test samples.No terms and definitions are listed in this document. ISO and IEC maintain terminological databases for use in standardization at the following addresses:ISO Online browsing platform: available at https://www.iso.org/obp
一IEC Electropedia: available at http://www.electropedia.org/A sample of coke greater than 20 mm in size (Micum and Irsid tests) and of known size distribution is subjected to mechanical stresses in a rotating drum. If desired, a sample of coke may also be analysed with a bottom size greater than 20 mm [e.g. 40 mm or 60 mm). Should the starting bottom size of coke used be different from 20 mm, it shall be stated in the test report. The degree of breakdown of the coke is evaluated by a process of sieving and size analysis after 100 drum revolutions (Micum test) and, if desired, after a total of 500 drum revolutions (Irsid test). Micum and Irsid tests may be performed on the same coke sample. Table 1 lists sample and test conditions as well as results in conducting Micum, Irsid and half Micum/ half Irsid tests.The drum shall have an opening on the cylindrical surface through which the coke is charged and discharged. The opening shall be fitted with a cover, the inner portion of which shall be of 10 mm steel plate of the same curvature as the drum, and which shall be of the same size as the opening so that when the cover is secured, the inside face is substantially level with the internal surface of the drum. A  rubber gasket should be fitted around the cover to minimize loss of dust.BS ISO 556 pdf download.