This Standard specifies a method to provide a relative measure for evaluating the degree of size degradation of iron ores when reduced in a fized bed at the temperature of 550 ℃ and then tumbled in a tumble drum at room temperaturem under conditions resembling those prevailing i the low-temperature reduction zone of a blast furnace.
JIS M 8720:2009 Referenced Document
JIS M 8700 Iron ore and direct reduced iron -- Vocabulary*， 2013-01-21 Update
JIS M 8702 Iron ores -- Sampling and sample preparation procedures*， 2019-03-20 Update
JIS M 8706 Iron ores and direct reduced iron -- Determination of size distribution by sieving*， 2022-07-20 Update
JIS Z 8401 Rounding of numbers*， 2019-01-01 Update
JIS Z 8801-1 Test sieves -- Part 1: Test sieves of metal wire cloth*， 2019-01-01 Update
JIS Z 8801-2 Test sieves -- Part 2: Test sieves of perforated metal plate*， 2022-02-21 Update
JIS M 8720:2009 history
2023JIS M 8720:2023 Iron ores -- Determination of low-temperature reduction-disintegration
2017JIS M 8720 AMD 1:2017 Iron ores -- Determination of low-temperature reduction-disintegration (Amendment 1)
2009JIS M 8720:2009 Iron ores -- Determination of low-temperature reduction-disintegration
2001JIS M 8720:2001 Iron ores -- Determination of low-temperature reduction-disintegration