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
郭拴全 1牛芳银 1康敏 1郭梅 1宁新霞 1邢相栋2
作者信息
- 1. 西安西北有色地质研究院有限公司,陕西西安 710054;陕西省矿产资源综合利用工程技术研究中心,陕西西安 710054
- 2. 西安建筑科技大学冶金工程学院,陕西西安 710054
- 折叠
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V3+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,V2O5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.
Abstract
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,pre-dominately in the V3+.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 V2O5 reaches approximately 71％.The blank roasting of the ash is con-trolled 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[-89 750/(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Key words
vanadium phosphate ore/power generation ash/blank roasting/vanadium leaching/apparent reac-tion activation energy/kinetic equation引用本文复制引用
基金项目
陕西省科技厅项目(2022ZDLSF07-10)
出版年
2024
NETL
NSTL
万方数据