摘要
工业V2O3产品为粉状，堆密度仅为0．6～1．2g/cm3，不利于提高其后续冶炼收率；由于V2O3的熔点较高，只能选择物理方法提高其密度。采用干法造粒成型工艺，通过降低压辊转速、增加压辊压强等方法可以获得相对密度较高的造粒物，造粒过程中采用多次排气，并施加120N／cm2的机械成型压力，使其密度提高到1．7～2．1g／cm3；使用高密度氧化钒制备钒铁，钒收率由89％～92％提高到94％～97％，且钒铁产品的结晶品质有所改善。
The industrial vanadium trioxide is powdery with bulk density of 0. 6 - 1.2 g/cm3, which is not good for recovering vanadium in the following vanadium alloy smelting process. Due to the high melting point of V2O3, only the physical method could be employed to increase the V2O3 density. In this paper, the non-slurry pelletizing process is introduced. Granular V2O3 with high relative bulk density can be acquired by reducing the roller＇s rotation speed and increasing the roller＇s pressure, etc. The bulk density of the granular V2O3 increases to 1.7 - 2. 1 g/cm3 through employing 5 exhaust processes and exerting 120 N/cm2 of mechanical molding pressure during pelletizing. V yield increases from 89% -92% to 93% -96% or even higher by using high-density V2O3 in the FeV metallurgy process. The V content in FeV alloy also slightly increases.
出处
《钢铁钒钛》
CAS
北大核心
2014年第2期20-25,共6页
Iron Steel Vanadium Titanium
基金
国家科技支撑计划基金资助项目(编号:2012BAE06B04)
国家重点基础研究发展计划(973计划)基金资助项目(编号:2013CB632605)
关键词
三氧化二钒
堆密度
干法造粒
成型压力
钒收率
V2O3, bulk density, non-slurry pelletizing, molding pressure, vanadium yield
