Leaching calcium from phosphogypsum desulfurization slag by using ammonium chloride solution: Thermodynamics and kinetics study

Yanjun Zhong; Ting Shi; Qiuge Chen; Xiushan Yang; Dehua Xu; Zhiye Zhang; Xinlong Wang; Benhe Zhon

doi:10.1016/j.cjche.2019.08.006

Your Location：

Home >

Browse articles >

Leaching calcium from phosphogypsum desulfurization slag by using ammonium chloride solution: Thermodynamics and kinetics study

Chemical Engineering Thermodynamics | Updated：2026-01-06

- Leaching calcium from phosphogypsum desulfurization slag by using ammonium chloride solution: Thermodynamics and kinetics study
- Leaching calcium from phosphogypsum desulfurization slag by using ammonium chloride solution: Thermodynamics and kinetics study
- 中国化学工程学报（英文版） 2020年28卷第1期页码：208-215
- Affiliations：
  
  School of Chemical Engineering, Engineering Research Center of Comprehensive Utilization and Clean Processing of Phosphorus Resources of Ministry of Education, Sichuan University,Chengdu,China,610065
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2019.08.006
  中图分类号：
- 纸质出版：2020
- Accepted：
Scan QR Code
Yanjun Zhong, Ting Shi, Qiuge Chen, 等. Leaching calcium from phosphogypsum desulfurization slag by using ammonium chloride solution: Thermodynamics and kinetics study[J]. 中国化学工程学报（英文版）, 2020,28(1):208-215.

Yanjun Zhong, Ting Shi, Qiuge Chen, Xiushan Yang, Dehua Xu, Zhiye Zhang, Xinlong Wang, Benhe Zhon. Leaching calcium from phosphogypsum desulfurization slag by using ammonium chloride solution: Thermodynamics and kinetics study[J]. Chinese Journal of Chemical Engineering, 2020, 28(1): 208-215.
Yanjun Zhong, Ting Shi, Qiuge Chen, 等. Leaching calcium from phosphogypsum desulfurization slag by using ammonium chloride solution: Thermodynamics and kinetics study[J]. 中国化学工程学报（英文版）, 2020,28(1):208-215. DOI： 10.1016/j.cjche.2019.08.006.

Yanjun Zhong, Ting Shi, Qiuge Chen, Xiushan Yang, Dehua Xu, Zhiye Zhang, Xinlong Wang, Benhe Zhon. Leaching calcium from phosphogypsum desulfurization slag by using ammonium chloride solution: Thermodynamics and kinetics study[J]. Chinese Journal of Chemical Engineering, 2020, 28(1): 208-215. DOI： 10.1016/j.cjche.2019.08.006.

摘要

Abstract

Phosphogypsum (PG) desulfurization slag is a calcium-rich residue from reductive decomposition of PG using sulfur as the reductant. We proposed a technology of preparation light calcium carbonate with PG desulfurization slag

which mainly contains two steps:leaching and carbonizing. In this work

we concentrated on the former

in which ammonium chloride aqueous solution was utilized as leaching agent to extract calcium from the slag

and conducted thermodynamics and kinetics study on it. FactSage software was employed to do thermodynamic and phase equilibrium diagram calculations. The influence of leaching conditions including agitation speed

initial concentration of leaching solution

reaction temperature

and liquid/solid ratio on the calcium leaching rate was discussed in detail by means of experiment optimal design. A kinetic model developed from the shrinking core model was given to describe the leaching process. The apparent kinetic activation energy (

) of the leaching reaction was calculated to be 10.58 kJ·mol

-1

关键词

Keywords

references

浏览量

490

Downloads

CSCD

文章被引用时，请邮件提醒。

Submit

工具集

关联资源

Optimizing energy efficiency in fluid catalytic cracking units with GA and NSGA-II: A comprehensive simulation and multi-factor analysis

Mass transfer and kinetic behavior studies on cycloaddition of carbon dioxide with propylene oxide catalyzed by ionic liquid in microchannel reactor

Bastnaesite carbochlorination process with fluorine fixation agents:An approach for low-waste rare earth extraction

Mechanisms governing coal ash fusion temperature by phosphorus

Physicochemical properties of UO3 products synthesized via a flame denitrification reactor