磷钒矿发电灰渣空白焙烧工艺及动力学研究  

Study on Blank Roasting Process and Kinetics of Power Generation Ash from Vanadium Phosphate Ore

作　　者：郭拴全 牛芳银 康敏 郭梅 宁新霞 邢相栋[3] GUO Shuan-quan;NIU Fang-yin;KANG Min;GUO Mei;NING Xin-xia;XING Xiang-dong(Xi′an Northwest Nonferrous Geological Research Institute Co.,Ltd.,Xi′an710054,China;Shaanxi Engineering and Technology Research Center for Comprehensive Utilization of Mineral Resources,Xi′an 710054,China;School of Metallurgical Engineering,Xi′an University of Architecture and Technology,Xi′an 710054,China)

机构地区：[1]西安西北有色地质研究院有限公司,陕西西安710054 [2]陕西省矿产资源综合利用工程技术研究中心,陕西西安710054 [3]西安建筑科技大学冶金工程学院,陕西西安710054

出　　处：《稀有金属与硬质合金》2024年第2期6-10,共5页Rare Metals and Cemented Carbides

基　　金：陕西省科学技术厅项目(2022ZDLSF07-10)。

摘　　要：以磷钒矿发电灰渣为原料,对其空白焙烧工艺及动力学进行了研究。结果表明:灰渣中钒主要以钒云母形式存在,而且主要呈V^(3+)价态;灰渣空白焙烧适宜的工艺参数为:焙烧前将灰渣磨矿至细度为-0.074 mm占90%,在880~900℃温度下焙烧16 h, V_(2)O_5浸出率可达71%左右;灰渣空白焙烧反应由界面化学反应控制,表观反应活化能为89.75 kJ/mol,动力学方程为1-(1-x)^(1/3 )=114.47exp[-89 750/(RT)]t。The blank roasting process and kinetics of power generation ash from vanadium phosphate ore were studied.The results show that in the ash,vanadium mainly exists in the form of vanadium mica,predominately in the V^(3+).The optimum process parameters for the blank roasting of the ash are as follows:grinding 90%of the ash to a fineness of-0.074 mm before roasting and then roasting the ash at 880~900℃for 16 h,the leaching rate of V_(2)O_5 reaches approximately 71%.The blank roasting of the ash is controlled by interfacial chemical reaction,with an apparent activation energy of 89.75 kJ/mol and a kinetic equation of 1-(1-x)^(1/3)=114.47exp[-89750/(RT)]t.

关 键 词：磷钒矿 发电灰渣 空白焙烧 钒浸出 表观反应活化能 动力学方程 

分 类 号：TF841.3[冶金工程—有色金属冶金]