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

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

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

Full Length Article | Updated：2026-01-06

- Study on synergistic leaching of potassium and phosphorus from potassium feldspar and solid waste phosphogypsum via coupling reactions
- Chinese Journal of Chemical Engineering Vol. 65, Issue 1, Pages: 117-129(2024)
- Affiliations：
  
  1. School of Chemical Engineering and Technology, Hebei University of Technology,Tianjin,China,300130
  2. National Engineering Research Center of Green Recycling for Strategic Metal Resources, Chinese Academy of Sciences,Beijing,China,100190
  3. School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, WA 6027, Australia 4 Key Laboratory of Carbonaceous Wastes Processing and Process Intensification of Zhejiang Province, The University of Nottingham Ningbo China,Ningbo,China,315100
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2024
- Accepted：
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coupling reactions[J]. 中国化学工程学报, 2024, 65(1): 117-129.
DOI：

coupling reactions[J]. 中国化学工程学报, 2024, 65(1): 117-129. DOI：

摘要

Abstract

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 paper. The 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 PG. The 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 paper. The results show that under optimal conditions

the leaching rate of K and P reach more than 93% and 96%

respectively. Kinetics study using shrinking core model (SCM) indicates two significant stages with internal diffusion predominantly controlling the leaching of K. The apparent activation energies of these two stages are 11.92 kJ·mol

-1

and 11.55 kJ·mol

-1

respectively.

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Related Institution

Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China

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

DOI：

摘要

Abstract

关键词

Keywords

references