One of the main problems in the steel industry of Iran is the depletion of iron magnetite deposits that could be processed with simple low intensity magnetic separation. Due to the high volume of hematite/goethite reserves in the country, the production of iron ore from these deposits can help to provide the raw material in the steel production chain. Methods of gravity separation, flotation, high intensity magnetic separation and reducing roasting followed by low intensity magnetic separation are used to process hematite ores. The capability of these methoses is significantly decreased in hematite/goethite resources and they are complex ores to respond to conventional processing technologies. The reduction of hematite and goethite minerals to magnetite which is followed by low-intensity magnetic separation, is one of the new solutions to process such ores. The aim of this study was to investigate the effect of some key parameters of roasting process including temperature, the amount of reducing agent, particle size and time on the separation efficiency. First, using HSC 6 software the thermodynamic conditions and stable species were evaluated. The effect of process parameters on grinding, magnetic separation was investigated. According to the results, optimum conditions for grinding was 10 minutes at 250 rpm, Davis Tube magnetic separation by the magnetic field strength of 600 gauss and fluctuations of 120 rpm. The optimum results for the reduction process was the temperature of 800 °C for 30 minutes with 4% reducing material with the particle size was 5 to 10 mm. characterization of the feed and the concentrate of low intensity magnetic separation by XRF analysis showed that the content of iron oxide was increased from 46.9% to 67.2% with 85.3% recovery. In order to study the different reduction sources, the reduction process was performed in optimum conditions with coal and gilsonite. In reduction by coal, iron content and total iron recovery were 68.5% and 91.7%, for 67.3% and 85.2% for gilsonite. In order to evaluate the results of reducing roasting method, the production of concentrates from hematite/goethite ore were performed by high-intensity magnetic separation and direct flotation process. The roasting method which results in reducing both the type of reduction, the resulting product has iron content and recovery is much higher, high intensity magnetic and flotation method. Highintensity magnetic procedure iron content and recovery iron of 54.3% and 67.0%, in the analysis tree of flotation, iron content and recovery of iron of 58.5% and 37.6%. According to the results, an efficient process based on reduction roasting and low-intensity magnetic separation was proposed to treate low grade hematite/goethite ores. Keywords: reducing roasting, hematite, goethite, magnetite concentrate, low inte