Study on synergistic leaching of potassium and phosphorus from potassium feldspar and solid waste phosphogypsum via coupling reactions

作     者：Chao Li Shizhao Wang Yunshan Wang Xuebin An Gang Yang Yong Sun Chao Li;Shizhao Wang;Yunshan Wang;Xuebin An;Gang Yang;Yong Sun

作者机构：School of Chemical Engineering and TechnologyHebei University of TechnologyTianjin 300130China National Engineering Research Center of Green Recycling for Strategic Metal ResourcesChinese Academy of SciencesBeijing 100190China School of EngineeringEdith Cowan University270 Joondalup DriveJoondalupWA 6027Australia Key Laboratory of Carbonaceous Wastes Processing and Process Intensification of Zhejiang ProvinceThe University of Nottingham Ningbo ChinaNingbo 315100China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2024年第65卷第1期

页      面：117-129页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 

基　　金：jointly supported by the National Key Research and Development Program of China (2019YFC1905800) the National Key Research & Development Program of China (2018YFC1903500) the commercial project by Beijing Zhong Dian Hua Yuan Environment Protection Technology Co., Ltd. (E01211200005) the Regional key projects of the science and technology service network program (STS program) of the Chinese Academy of Sciences (KFJ-STS-QYZD-153) the Ningbo Science and Technology Innovation Key Projects (2020Z099, 2022Z028) the Ningbo Municipal Commonweal Key Program (2019C10033) the support of Mineral Resources Analytical and Testing Center, Institute of Process Engineering, Chinese Academy of Science 

主　　题：Phosphogypsum Potassium feldspar Coupling reaction Leaching Waste treatment Kinetics 

摘      要：To achieve the resource utilization of solid waste phosphogypsum(PG)and tackle the problem of utilizing potassium feldspar(PF),a coupled synergistic process between PG and PF is proposed in this *** study investigates the features of P and F in PG,and explores the decomposition of PF using hydrofluoric acid(HF)in the sulfuric acid system for K leaching and leaching of P and F in *** impact factors such as sulfuric acid concentration,reaction temperature,reaction time,material ratio(PG/PF),liquid–solid ratio,PF particle size,and PF calcination temperature on the leaching of P and K is systematically investigated in this *** results show that under optimal conditions,the leaching rate of K and P reach more than 93%and 96%,*** study using shrinking core model(SCM)indicates two significant stages with internal diffusion predominantly controlling the leaching of *** apparent activation energies of these two stages are 11.92 kJ·mol^(-1)and 11.55 kJ·mol^(-1),respectively.