摘要
针对钒渣钠化焙烧提钒工艺过滤系统钒回收率低、运行成本高等问题,结合产线现有流程装备,对球磨浸出和板框过滤系统进行了升级改造。为避免在输送过程中杂物堵塞、提高料浆输送和过滤洗涤效率,球磨浸出系统加装滚筒筛去除浆液中大颗粒物料及杂物,使用水力旋流器将胶体及细小颗粒分离。研究了回转窑出料量对水力旋流器设备匹配的影响,经过优化调整试验,沿过滤带运动的垂直方向两侧各布置3台水力旋流器,出口直径分别为25 mm和35 mm。板框过滤机被真空带式过滤器替换后,设备维护费用降低83.65%,同时研究了工艺参数对过滤效率和钒收率的影响,在真空带15 mm料层厚度和梯度洗涤最优工艺条件下,尾渣中钒平均含量从0.1%降至0.087%,钒收率提高0.53%,实现了浆料过滤过程高效率运行。
Aiming at the problems of low vanadium recovery rate and high operating cost in the filtration system of vanadium extraction after vanadium slag sodding and roasting,combined with the existing process equipment of the production line,we upgraded and reformed the ball mill leaching and plate and frame filtration system,respectively.In order to avoid the clogging of debris in the conveying process,improve the efficiency of slurry conveying,filtration and washing,the ball mill leaching system is equipped with a drum screen to remove large particles and debris in the slurry,colloidal and fine particles are separated using hydrocyclone,the rotary kiln discharge were research on the impact of matching hydrocyclone equipment,after the optimization and adjustment of the test,three hydrocyclone were set along the movement of filtration belt on each side with the exit diameter of 25 mm and 35 mm,respectively.After the plate and frame filter was replaced by a vacuum belt filter,the maintenance cost of the equipment was reduced by 83.65%.The effects of process parameters were studied experimentally on the filtration efficiency and vanadium yield.Under the optimal process conditions of vacuum belt with 15 mm material layer thickness and gradient washing,the average vanadium content in the tailings decreased from 0.1%to 0.087%,and the vanadium yield increased by 0.53%,realizing high-efficiency operation of the slurry filtration process.
作者
周雅平
万贺利
王少伟
刘帅峰
李兰杰
Zhou Yaping;Wan Heli;Wang Shaowei;Liu Shuaifeng;Li Lanjie(Chengde Vanadium and Titanium New Materials Co.,Ltd.,Chengde,067002,Hebei;HBIS Materials Technology Research Institute,Shijiazhuang 050023,Hebei)
出处
《河北冶金》
2024年第9期75-78,共4页
Hebei Metallurgy
关键词
钒渣
钒收率
真空带式过滤器
梯度洗涤
水力旋流器
料层厚度
vanadium slag
vanadium recovery
vacuum belt filter
gradient washing
hydrocyclone
layer thickness
