钒渣冷却方式对钒尖晶石颗粒大小及钠化焙烧效果的影响  

Influence of Vanadium Slag Cooling Scheme on Particle Size of Vanadium Spinel and Sodium Roasting

作　　者：付自碧[1] 尹丹凤[1] 张新霞[2] 

机构地区：[1]攀钢集团研究院有限公司,钒钛资源综合利用国家重点实验室,四川攀枝花617000 [2]昆明理工大学冶金与能源工程学院,云南昆明650093

出　　处：《钢铁钒钛》2012年第3期6-10,共5页Iron Steel Vanadium Titanium

摘　　要：对三种不同冷却方式得到的水冷钒渣、风冷钒渣和缓冷钒渣的物相结构、钒尖晶石颗粒大小进行了分析,考察了氮气气氛下1 000℃保温时间对钒尖晶石颗粒大小的影响,并对水冷钒渣、风冷钒渣和缓冷钒渣在相同条件下的钠化焙烧效果进行了比较。研究结果表明,缓冷和1 000℃保温有利于钒尖晶石颗粒长大;-0.125 mm钒渣在不添加提钒尾渣焙烧时,不同粒度范围的水冷钒渣焙烧钒转化率比同粒度范围的缓冷钒渣低1～2个百分点;-0.125 mm钒渣添加提钒尾渣焙烧时,水冷钒渣焙烧钒转化率比缓冷钒渣低0.56个百分点。Phase structures and spinels’ particle size of water-cooled vanadium slag,air-cooled vanadium slag and slowly cooled vanadium slag are analyzed,and the effect of holding time at 1 000 ℃ under nitrogen atmosphere on particle size of the vanadium spinel is studied.In addition,comparisons of sodium roasting of water-cooled vanadium slag,air-cooled vanadium slag and slowly cooled vanadium slag under the same conditions are made.According to the research,slow cooling and holding at 1 000 ℃ benefits the growth of vanadium spinel particles;for the vanadium slag of-0.125 mm roasted without vanadium extraction tailings,the conversion rate of water-cooled vanadium slag at different size range is 1%~2% lower than that of slowly cooled vanadium slag at the same size range;for the vanadium slag of-0.125 mm roasted with vanadium extraction tailings,the conversion rate of water-cooled vanadium slag is 0.56% lower than that of slowly cooled vanadium.

关 键 词：钒渣 冷却方式 钒尖晶石 粒径 钒转化率 

分 类 号：TF841.3[冶金工程—有色金属冶金]