Abstarct: Silica is a harmful mineral in iron production at direct reduction which due to the high percentage of silica in Chadormalu concentrate and its resulting increased costs, the reduction of silica is extremely important. Most of times, silica grade is more than 2% and also with a lot of volatility. The purpose of this project is to investigate the possibility of reducing the silica grade in final iron concentrate as much as possible and provide a high quality product of iron and silica. For this purpose, samples were produced and prepared by chemical analysis and size classification. Then using magnetic separation and flotation methods, some experiments were designed by which each of the parameters such as magnetic field intensity, size and feed solid percent for magnetic separation and collector dosage, solid percent, and agitation speed for flotation were studied. The results showed that the intensity of the magnetic field of 3200 gauss, feed size of 35 microns and a solid percent of 30, the lowest grade of silica is achieved as 1.53 percent with the iron content of 65/2. And also the collector dosage of 320 g/t, solid percent of 35 and agitation speed of 320 rpm had the greatest impact on reducing the grade silica in flotation process in which 1/55 % of silica with iron content of 68.8 % was achieved. The results of the validation tests have confirmed these findings. Thus, at least 1% of the silica grade in Chadormalu final concentrate was reduced which has a great benefit for Mobarakeh steel complex.