Titanium-bearing magnetite ore is generically defined as magnetite with > 1% titanium dioxide (TiO2) and is usually vanadium-bearing. The iron and titanium occur as a mixture of magnetite (Fe3O4) and ilmenite (FeTiO3) with vanadium oxide usually occurring within the solid solution of the titanium-bearing magnetite phase. These ores are currently widely processed in blast furnaces via modified ironmaking processes. Typically, vanadium is recovered as a by-product from the ironmaking process, while the diluted titania slag is stockpiled. Fluxless smelting in a direct-current open-arc furnace is proposed as an opportunity to improve iron and vanadium recovery and potentially unlock the titanium as a slag product. Slags produced from a pilot study are compared to industrial slags produced from ilmenite. The findings from the pilot test show that slag produced under fluxless smelting conditions in an open-arc electric furnace is remarkably similar to industrial ilmenite slags. The test conditions were varied to evaluate the slag and metal composition, and furnace operation, under increasing reducing conditions. The study showed that the slag and metal product was remarkably similar to industrial slag produced from ilmenite.

中文翻译：

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钛磁铁矿无助熔剂冶炼富二氧化钛渣的评价

含钛磁铁矿一般定义为二氧化钛 (TiO2) 含量 > 1% 的磁铁矿，通常含钒。铁和钛以磁铁矿 (Fe3O4) 和钛铁矿 (FeTiO3) 的混合物形式存在，而氧化钒通常存在于含钛磁铁矿相的固溶体中。这些矿石目前通过改良的炼铁工艺在高炉中广泛加工。通常，钒作为炼铁过程的副产品被回收，而稀释的二氧化钛渣则被储存起来。建议在直流明弧炉中进行无助熔剂冶炼，以提高铁和钒的回收率，并有可能将钛作为炉渣产品解锁。将试点研究生产的炉渣与钛铁矿生产的工业炉渣进行比较。中试结果表明，在明弧电炉无助熔剂冶炼条件下产生的炉渣与工业钛铁矿渣非常相似。改变试验条件以评估炉渣和金属成分，以及在增加还原条件下的熔炉操作。研究表明，炉渣和金属产品与钛铁矿生产的工业炉渣非常相似。