Iron ore is one of the most abundant metallic elements in the earth. Its oxide is about 5% of the Earth’s crust. Common iron ore minerals are hematite (Fe2O3) with 70% iron and magnetite (Fe3O4), which has 72% iron. The average grade in iron ore is about 60 to 65 percent,
In terms of mechanical properties, the quality of the iron ore to the ore or the fine grains (particle size less than 4.75 mm), lumb, or particle size with a diameter of more than 4.76 mm and the pellets are divided. The pellets are produced by the agglomeration process of fine-grained minerals and concentrated iron minerals, and their particle size is 59.55 mm to 16 mm.