The iron ore concentrate production factory of Opal Parsian Sangan Co. was commissioned in April 2012 as the first iron ore concentrate production factory in the Sangan region. The factory set a new production record in 2019 by producing more than 3 million tons of iron ore concentrate.
The company's crushing plant supplies the iron ore input of the company's concentrate production factory with a capacity of 3.1 million tons and an hourly rate of 700 tons. The input ore is ground in three stages by three different millers, including an Autogenous Mill, Ball Mill, and Tower Mill. The ore size is reduced from 200 millimeters to 350 microns in the autogenous mill, to 70 microns in the ball mill, and 38 microns at the end of the milling process in the tower mill.
After each milling, magnetic separators, which increase the iron grade, are utilized to increase the degree of liberation, and the product is sent to the next stage mill. The concentrate passes through a flotation circuit to decrease the amount of sulfur. Next, the concentrate is dewatered using a filter press, and the high-grade iron ore concentrate with a Fe content of more than 65%, a size of 38 microns, and a maximum humidity of 9.5% is sent for stockpiling and entering the pellet production factory.