AbstractsEngineering

Beneficiation of iron ore is the term applied to the many processes or combination of processes by which the ore is made more adaptable for smelting in the iron blast-furnace. Iron ore beneficiation methods are largely determined by the nature of iron ores as well as by the blast-furnace requirements. In modern blast-furnace practice the structure of the ore and the chemical composition are both of importance. Certainly, the higher the iron content and the lower the silica, phosphorus and sulphur, the more desirable the ore becomes, but if its structure is bad, that is, if the blast-furnace gases penetrate the lumps of ore with difficulty, the ore is even less satisfactory than one of poorer chemical composition but more porous structure. [...]