Process simulation and energy integration in the mineral carbonation of blast furnace slag

Jianqiu Gao; Chun Li; Weizao Liu; Jinpeng Hu; Lin Wang; Qiang Liu; Bin Liang; Hairong Yue; Guoquan Zhang; Dongmei Luo; Siyang Tang

doi:10.1016/j.cjche.2018.04.012

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Process simulation and energy integration in the mineral carbonation of blast furnace slag

Process Systems Engineering and Process Safety | Updated：2026-01-06

- Process simulation and energy integration in the mineral carbonation of blast furnace slag
- Chinese Journal of Chemical Engineering Vol. 27, Issue 1, Pages: 157-167(2019)
- Affiliations：
  
  School of Chemical Engineering, Sichuan University,Chengdu,China,610065
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2018.04.012
  CLC：
- Published：2019
- Accepted：
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Jianqiu Gao, Chun Li, Weizao Liu, Jinpeng Hu, Lin Wang, Qiang Liu, Bin Liang, Hairong Yue, Guoquan Zhang, Dongmei Luo, Siyang Tang. Process simulation and energy integration in the mineral carbonation of blast furnace slag[J]. Chin.J.Chem.Eng., 2019, 27(1): 157-167.
DOI：

Jianqiu Gao, Chun Li, Weizao Liu, Jinpeng Hu, Lin Wang, Qiang Liu, Bin Liang, Hairong Yue, Guoquan Zhang, Dongmei Luo, Siyang Tang. Process simulation and energy integration in the mineral carbonation of blast furnace slag[J]. Chin.J.Chem.Eng., 2019, 27(1): 157-167. DOI： 10.1016/j.cjche.2018.04.012.

摘要

Abstract

Large quantities of blast furnace (BF) slag and CO

are discharged annually from iron and steel industries

along with a large amount of waste heat. The mineral carbonation of BF slag can not only reduce emissions of solid waste but also realize the in-situ fixation of CO

with low energy consumption if integrated with the waste heat utilization. In this study

based on our previous works

Aspen Plus was employed to simulate and optimize the carbonation process and integrate the process energy. The effects of gehlenite extraction

MgSO

carbonation

and aluminum ammonium sulfate crystallization were studied systematically. The simulation results demonstrate that 2.57 kg of BF slag can sequester 1 kg of CO

requiring 5.34 MJ of energy (3.3 MJ heat and 2.04 MJ electricity)

and this energy includes the capture of CO

from industrial flue gases. Approximately 60 kg net CO

emission reduction could be achieved for the disposal of one ton of BF slag. In addition

the by-product

aluminum ammonium sulfate

is a high value-added product. Preliminary economic analysis indicates that the profit for the whole process i

s 1127 CNY per ton of BF slag processed.

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