关键词: 铁精矿, 脱硫, 过氧化氢, 循环试验

Abstract: In order to improve the quality of iron concentrate and meet the requirements of low sulfur raw materials for iron and steel smelting，the desulfurization test was carried out with a magnetic iron con⁃ centrate from Daye as the test material and hydrogen peroxide as the oxidant. The effects of hydrogen perox⁃ ide concentration，reaction temperature，sulfuric acid dosage and reaction time on the desulfurization of the iron concentrate were investigated. The results showed that when the solid-liquid ratio is 1∶2，the optimum desulfurization conditions are as follows.The amount of hydrogen peroxide is 20 g，the amount of sulfuric ac⁃ id is 10 g，the reaction temperature is 40 ℃，and the reaction time is 30 min. The results of the cycle test showed that under the condition of ensuring the concentration of hydrogen peroxide，2 g of hydrogen perox⁃ ide is added each time，and the desulfurization rate is still maintained at a high level. Finally，the sulfur content in the iron concentrate is reduced to 0.2%，and the iron recovery rate is 97%.

Key words: iron concentrate, desulfurization, hydrogen peroxide, cycle test