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
- Study on synergistic leaching of potassium and phosphorus from potassium feldspar and solid waste phosphogypsum via coupling reactions
- 中国化学工程学报（英文版） 2024年65卷第1期页码：117-129
- 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：
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  中图分类号：
- 纸质出版：2024
- Accepted：
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Chao Li, Shizhao Wang, Yunshan Wang, 等. Study on synergistic leaching of potassium and phosphorus from potassium feldspar and solid waste phosphogypsum via coupling reactions[J]. 中国化学工程学报（英文版）, 2024,65(1):117-129.

coupling reactions[J]. 中国化学工程学报, 2024, 65(1): 117-129.
Chao Li, Shizhao Wang, Yunshan Wang, 等. Study on synergistic leaching of potassium and phosphorus from potassium feldspar and solid waste phosphogypsum via coupling reactions[J]. 中国化学工程学报（英文版）, 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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Study on synergistic leaching of potassium and phosphorus from potassium feldspar and solid waste phosphogypsum via coupling reactions

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

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摘要

Abstract

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Keywords

references