摘要
以洛南石英砂为原料,在超声场条件下酸洗去除铁杂质,考察了酸洗时间、酸洗温度、液固比(液体体积毫升与固体质量克的比,下同)、酸质量分数、超声频率等因素对铁杂质去除率的影响,得到最优工艺条件为:酸洗时间25 min、酸洗温度45℃、液固比10∶1、酸质量分数10%、超声频率80 kHz、超声功率270 W。在此最优条件下,铁去除率可达到97.84%。超声辅助条件下盐酸酸洗除铁动力学符合缩核模型,受产物层扩散控制,除铁反应的表观活化能为11.83 kJ·mol^(-1)。
Using Luonan quartz sand as the raw material,iron impurities were removed by acid leaching under ultrasonic field conditions.The effects of acid leaching time,acid leaching temperature,liquid-solid ratio(the ratio of liquid volume milliliter to solid mass gram,the same below),acid mass fraction and ultrasonic frequency on the removal rate of iron impurities were investigated.The optimal process conditions were obtained as follows:acid leaching time 25 min,acid leaching temperature 45℃,liquid-solid ratio10∶1,acid mass fraction 10%,ultrasonic frequency 80 kHz,and ultrasonic power 270 W.Under these optimal conditions,the Fe removal rate reached 97.84%.The kinetics of iron removal by hydrochloric acid leaching under ultrasonic-assisted conditions conforms to the shrinking core model and is controlled by the diffusion of product layer.The apparent activation energy of Fe removal reaction is 11.83 kJ·mol^(-1).
作者
李峰
陈飞鹏
乔成芳
刘明宝
崔孝炜
刘倩
LI Feng;CHEN Feipeng;QIAO Chengfang;LIU Mingbao;CUI Xiaowei;LIU Qian(Shaanxi Engineering Research Center for Mineral Resources Clean&Efficient Conversion and New Materials,Shangluo University,Shangluo Shaanxi 726000,China;Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo Shaanxi 726000,China;Qinling Mineral Resources Utilization Industry College,Shangluo University,Shangluo Shaanxi 726000,China;Shaanxi Zhongtai Materials Technology Co.,Ltd.,Shangluo Shaanxi 726000,China;Shangluo Key Laboratory of Silicon-based Materials,Shangluo Shaanxi 726000,China)
出处
《当代化工》
2025年第11期2575-2578,2585,共5页
Contemporary Chemical Industry
基金
陕西省科技创新团队项目(项目编号:2025RS-CXTD-039)
陕西省实验室重点项目(项目编号:2025SYS-SYSZD-063)
陕西省秦创原“科学家+工程师”队伍建设项目(项目编号:2025QCY-KXJ-191)
商洛市区域创新项目(项目编号:2024-新材料(2024)-0004)
商洛市“科技副总”人才项目(项目编号:2024-KJFZ-02)
商洛市科技计划项目(项目编号:2022-J-0005)
商洛学院科研平台发展专项项目(项目编号:24KYZX01)。
关键词
石英砂
超声波
酸洗
铁
气泡
动力学模型
Quartz sand
Ultrasonic
Acid leaching
Iron
Bubble
Kinetic modeling
