Iron ore contains important minerals such as hematite, magnetite, goethite, an‎d limonite, with hematite an‎d magnetite being the most extracted minerals. Nowadays, high-grade sources are gradually decreasing an‎d cannot meet the deman‎ds of the steel industry. Therefore, low-grade sources can be utilized, which, if composed of crystalline hematite minerals, can be concentrated using existing methods; however, if they do not have a crystalline structure, a new method is required. Additionally, the steel industry produces a large amount of carbon dioxide gas, causing climate change an‎d environmental pollution. This research focused on the method of producing magnetite concentrate by converting hematite minerals from the tailings of the Tang-e-Zagh iron processing an‎d development plant. The results showed that hydrogen gas, as a reducing agent, an‎d a furnace derived from a shaft furnace are suitable for fine grain size, an‎d at a temperature of 650 degrees Celsius for a duration of 5 minutes, this sample is responsive. The sample was exposed to hydrogen gas as a reducing agent in the furnace derived from the shaft furnace at temperatures of 450, 500, 550, 600, an‎d 650 degrees Celsius for durations of 1, 5, an‎d 15 minutes. Then, the initial concentrate was separated using a magnetic separator with 1200 Gauss, followed by grinding to a particle size of less than 38 microns, an‎d the final concentrate was obtained again using a magnetic separator with 800 Gauss.

مهدي نصيري سروي

علي احمدي عامله , بيژن طاهري