钒渣空白焙烧高效清洁提钒技术  

HIGH- EFFICIENCY CLEAN VANADIUM- EXTRACTING TECHNIQUE OF VANADIUM SLAG BLANK CALCINATION

作　　者：李兰杰[1] 陈东辉[1] 白瑞国[1] 刘雅健 王少伟[1] 陈育红[1] 

机构地区：[1]河北钢铁集团承钢公司,河北承德067002

出　　处：《河北冶金》2014年第12期29-33,共5页Hebei Metallurgy

基　　金：国家重点基础研究发展规划(973)基金资助项目(编号:2013CB632605);国家科技支撑项目(编号:2012BAE06B04)

摘　　要：针对现有钒渣焙烧提钒工艺中存在焙烧温度高、炉窑结圈、转浸率低、产生大量氨氮废水等问题,研究了钒渣空白焙烧过程钒尖晶石相的氧化过程及机理,得出结论:钒铁尖晶石相在600℃以后即可完全氧化分解,钒渣经过750℃以上的温度一次焙烧后钒转化率>95%。通过钒渣Na OH水热碱浸实验,在180℃碱浸2 h条件下可以使钒浸出率达到95%以上。在空白焙烧-水热碱浸过程中,无有害气体及废水排放,属于高效清洁提钒生产技术。To solve the problems in present vanadium - slag calcinating vanadium - extracting process： high calcinating temperature, furnace ringing, low extraction rate, a large quantity of ammonia nitrogen waste wa- ter, it is researched the oxidation process and mechanism of vanadium spinal phase in vanadium - slag blank calcination process. The research conclusion shows that the ferrovanadium spinal phase can be completely ox- idized and decomposed when temperature being over 600 ℃, the vanadium conversion rate of vanadium - slag can be over 95% after primary roast in over 750 ℃. In the procedure of blank calcinations - hydrother- mal alkali leaching, no harmful air and waste water are produced, and it is a high - efficiency and clean va- nadium - extraction technique.

关 键 词：钒渣 焙烧 清洁 提钒技术 

分 类 号：TF646[冶金工程—钢铁冶金]