PD ISO/TR 18230:2015 pdf free.Iron ores一Determination of loss on ignition一Nonoxidised ores. This Technical Report describes a gravimetric method for the determination of the loss in mass of non- oxidized iron ores, when ignited at 1 000 °C. This method is applicable to a concentration range of a mass fraction of—3,0 % to 7,0% loss on ignition in natural iron ores, iron ore concentrates and agglomerates, and sinters. The method is not applicable to the following: a) processed ores containing metallic iron (direct reduced iron); b) natural or processed ores in which the sulfur content is higher than a mass fraction of 0,2 %; c) internationally traded ores with combined water greater than 2,5 %. NOTE I Loss on ignition can be used as an estimate ol combined water. NOTE 2 This method is intended for in-house use and is not intended for referee purposes. 2 Principle A test portion is heated in a muffle furnace at 1 000 °C for 60 mm and cooled in a desiccator. The decreased mass of the test portion is then measured. 3 Reagents During the analysis, use only reagents of recognized analytical grade. 3.1 Silica gel, dried at 105 °C for 4 h. 4…