Iron being one of the most important raw materials of the industry is of silver brightness in its pure form and it easily oxidizes and it is found in free form in the nature rarely. Iron ores are oxides, sulphure, sulphate and iron ores.
The most frequently used in cement industry is hematite and limonit.
Hematite: Its color is iron black in the form of crystal and sometimes it is multi-colored and red in the aggregated form. It is easily breakable. Composition of hematite is 70% Fe and 30% oxygen.
Limonit: Its color is yellowish brown, reddish Brown and blackish. Limonit is found in every area and it is very widespread and also it is a mineral forming large deposits.
Iron ore is supplied from the producer companies.