材料期刊网

攀枝花钒钛磁铁矿,矿物组成复杂，属于“难选、难烧、难炼”的矿石，选矿难度大，其精矿产品含铁品位低，TiO2高。采用阶磨阶选工艺可提高铁品位2-2.5％，但TiO2没有降低。精矿具有“低铁、低硅，高钛、高铝、高亚铁、高硫，高熔点”的特点，同时精矿粒度粗，制粒性能差，影响烧结透气性。该精矿初始熔点高，生成液相量少，烧结矿矿物组成复杂，严重影响强度与冶金性能。烧结采取使用生石灰强化制粒技术，提高烧结矿碱度，添加普通矿粉降低烧结矿TiO2，采取高负压、大风量烧结等强化技术，钒钛磁铁精矿烧结与高炉冶炼取得了重大技术突破，攀枝花钒钛磁铁矿利用水平与价值取得重大效果。

Vanadium and titanium magnetite is a ores with the complex mineral composition so that it is difficult to beneficiate,sinter,smelt. specially , the beneficiation is very difficulty, and its products is low-grade iron and high TiO2 in Panzhihua.the grade of iron 2-2.5% was increased by stage-grinding-stage-concentration technology ,but TiO2 was no lower.The Concentrate with the characteristics in "low iron, low silicon, high titanium, high aluminum, high-ferrous, high-sulfur, high melting temperature"，at the same time ,so the sintering permeability is influenced because granulation capability is worse due to concentrate coarse particle size . The strength and metallurgical properties were affected severely as sinter liquid was less and complex mineral composition owing to high melting temperature point of concentrate.Vanadium titanium magnetite concentrate sintering and smelting blast furnace have made significant technological breakthrough and its’ utilization level and value significant results were obtained by using of quicklime to strengthen granulation technology, increasing sinter basicity, adding ordinary ore to lower TiO2, using high negative pressure-high winds ect.