Measurement and control of containing-fluorine particulate matter emission during spent pot lining combustion detoxification process

Funian Han; Liang Yu; Xinyun Mo; Lu Zhang; Jiaqi Jia; Jingmeng Dong; Shaopeng Gu

doi:10.1016/j.jhazmat.2023.130748

Measurement and control of containing-fluorine particulate matter emission during spent pot lining combustion detoxification process

J Hazard Mater. 2023 Apr 5:447:130748. doi: 10.1016/j.jhazmat.2023.130748. Epub 2023 Jan 6.

Authors

Funian Han¹, Liang Yu², Xinyun Mo¹, Lu Zhang³, Jiaqi Jia³, Jingmeng Dong⁴, Shaopeng Gu⁵

Affiliations

¹ College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; Chongqing Key Laboratory of Vanadium-Titanium Metallurgy and New Materials, Chongqing University, Chongqing 400044, China.
² College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China. Electronic address: yuliang@cqu.edu.cn.
³ College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China.
⁴ College of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China.
⁵ College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063210, China.

PMID: 36669415
DOI: 10.1016/j.jhazmat.2023.130748

Abstract

The particle size distribution (PSD), composition, morphology, and formation mechanism of particulate matter (PM) released from the combustion of spent pot lining with and without CaSiO₃ were investigated. The results showed that NaF and Na₃AlF₆ were found to be the main compositions of PM, and the particle size distribution of PM shows a bimodal distribution. CaSiO₃ substantially inhibited the emission of PM by transforming NaF, Na₃AlF₆, and CaF₂ into stable Ca₄Si₂O₇F₂. Moreover, CaSiO₃ also limited the formation of high hazardous PM_0.2 by providing SiO₂, Al₂O₃, and NaAlSiO₄ with high melting points as the core of promoting the growth of PM in particle size.

Keywords: Combustion; Detoxification; Particulate matter; Spent pot lining.